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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2964. Отображено 100.
12-04-2012 дата публикации

Single piston sleeve valve with optional variable compression ratio capability

Номер: US20120089316A1
Автор: James M. Cleeves, Michael A. Willcox, Michael Hawkes, Simon David Jackson
Принадлежит: Pinnacle Engines Inc

An internal combustion engine can include a piston moving in a cylinder and a junk head disposed opposite the piston head in the cylinder. The junk head can optionally be moveable between a higher compression ratio position closer to a top dead center of the piston and a lower compression ratio position further from the top dead center position of the piston. At least one intake port can deliver a fluid comprising inlet air to a combustion chamber within the cylinder. Combustion gases can be directed out of the combustion volume through at least one exhaust port. One or both of the intake port and the exhaust port can be opened and closed by operation of a sleeve valve that at least partially encircles the piston. Related articles, systems, and methods are described.

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Номер записи: 1
08-11-2012 дата публикации

Spark ignition four-stroke cycle engine

Номер: US20120279471A1
Автор: Yasuhito Yaoita
Принадлежит: Individual

A second exhaust poppet valve 9 is provided in a portion of a combustion chamber expanded out of a main cylinder 1 . A valve cover 7 reciprocates within a sub-cylinder 4 and covers a bottom surface of the second exhaust poppet valve 9 . A first exhaust valve 10 and an intake poppet valve 11 are provided so as to face an upper surface of a piston 2 . After the second exhaust poppet valve 9 is opened and hot high-pressure burned gas starts to flow away, the first exhaust poppet valve 10 is opened. As a result, the temperature of the first exhaust poppet valve 10 is reduced and the compression ratio can be increased. Then, a work amount of the piston is increased. The increased work amount compensates an amount of cooling loss due to increasing a surface area of the combustion chamber.

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Номер записи: 2
08-11-2012 дата публикации

Two-stroke internal combustion engine with variable compression ratio and an exhaust port shutter and a method of operating such an engine

Номер: US20120283932A1
Автор: David Blundell, James William Griffith Turner
Принадлежит: Lotus Cars Ltd

A two-stroke internal combustion engine for varying the compression ratio and the area of an exhaust port of a cylinder includes at least one piston reciprocable within a cylinder, an exhaust port opened and closed by the piston during the reciprocal motion thereof, moveable shutter means for varying the effective area of the exhaust port, a compression ratio variation mechanism for varying a compression ratio of the cylinder, sensor means for measuring one or more operating characteristics of the engine and for generating signals corresponding thereto, and a control unit which processes the signals generated by the sensor means and controls the motion of the shutter means accordingly and controls the compression ratio variation mechanism to vary the compression ratio of the cylinder; wherein the engine can operate with a compression ratio in the range 30:1 to 50:1.

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Номер записи: 3
16-05-2013 дата публикации

Valve opening and closing control apparatus

Номер: US20130118428A1
Автор: Hiroki Mukaide, Naoto Toma, Shigemitsu Suzuki
Принадлежит: Aisin Seiki Co Ltd

A valve opening and closing time control apparatus includes; a relative rotation angle control unit performs most delayed angle setting control of setting a relative rotation angle between a driving side rotating body and a driven side rotating body to the most delayed angle when performing an automatic stop, and most delayed angle restriction control of maintaining the relative rotation angle in the most delayed angle from a beginning of the automatic start until reaching a set timing when the automatic start-up begins, and releasing a maintenance of the most delayed angle after the setting timing.

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Номер записи: 4
30-05-2013 дата публикации

Crankshaftless internal combustion engine

Номер: US20130133626A1
Автор: Hyunjun HONG, Jerok Chun, Sangmoo Lee, Wonjin Jo, Youngjic Kim
Принадлежит: Hyundai Motor Co

A crankshaftless internal combustion engine includes a power shaft unit in which a transferring path of a power system is selected depending on a deactivated state and an activated state of a cylinder and a cylinder separator separating a power system of the deactivated cylinder from the power shaft unit by control of an ECU, thereby improving fuel efficiency due to a uniform change in volume of a combustion chamber of the cylinder and increasing reduction in Nox of exhaust gas, and particularly, a plurality of cylinders are controlled in a variable cylinder scheme to further improve fuel efficiency and be optimal to even EM improvement.

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Номер записи: 5
29-08-2013 дата публикации

VARIABLE COMPRESSION RATIO SYSTEMS FOR OPPOSED-PISTON AND OTHER INTERNAL COMBUSTION ENGINES, AND RELATED METHODS OF MANUFACTURE AND USE

Номер: US20130220279A1
Автор: Cleeves James M.
Принадлежит: PINNACLE ENGINES, INC.

Various embodiments of methods and systems for varying the compression ratio in opposed-piston engines are disclosed herein. In one embodiment, an opposed-piston engine can include a first phaser operably coupled to a first crankshaft and a second phaser operably coupled to a corresponding second crankshaft. The phase angle between the crankshafts can be changed to reduce or increase the compression ratio in the corresponding combustion chamber to optimize or at least improve engine performance under a given set of operating conditions. 1. A method for varying the compression ratio in an engine having a first piston that cooperates with a second piston to define a combustion chamber therebetween , the method comprising:moving the first piston back and forth in a first cycle between a first bottom dead center (BDC) position and a first top dead center (TDC) position according to a first piston timing;moving the second piston back and forth in a second cycle between a second BDC position and a second top dead center TDC position according to a second piston timing;while moving the first piston according to the first piston timing and the second piston according to the second piston timing, periodically opening and closing at least one passage in fluid communication with the combustion chamber according to a valve timing; and changing the first piston timing relative to the valve timing; and', 'changing the second piston timing relative to the valve timing., 'while maintaining the valve timing, varying the compression ratio of the combustion chamber by'}2. The method of wherein the first piston is operably coupled to a first crankshaft and the second piston is operably coupled to a second crankshaft claim 1 , and wherein varying the compression ratio of the combustion chamber includes:changing a first phase angle of the first crankshaft relative to the valve timing; andchanging a second phase angle of the second crankshaft relative to the valve timing.3. The method of ...

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Номер записи: 6
17-10-2013 дата публикации

Variable stroke assembly

Номер: US20130269658A1
Автор: Raymond Sydney O'DONNELL
Принадлежит: Individual

There is proposed a variable stroke assembly having a primary crank, the primary crank having a primary axis of rotation; a hypocycloid gear set having at least one internal gear and at least one spur gear, the internal gear having an axis of rotation that coincides with the primary axis of rotation of the primary crank and the spur gear having a secondary axis of rotation, wherein the primary crank cooperatively engages and rotates within the internal gear about the primary axis of rotation, the spur gear pivotally mounted on the primary crank such that the secondary axis of rotation is offset from the primary axis of rotation; a secondary crank having a third axis of rotation, wherein the secondary crank cooperatively engages the spur gear such that the third axis of rotation is further offset from the primary and secondary axis of rotation; a connecting rod, with a first and second end, the first end of connecting rod is pivotally connected to the secondary crank, wherein operation the connecting rod travels in a substantially linear motion that translates into rotational motion of the secondary crank, spur gear and primary crank.

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Номер записи: 7
24-10-2013 дата публикации

Internal combustion engine with partial deactivation and method for the operation of an internal combustion engine of said type

Номер: US20130276747A1
Автор: Albert Breuer, Helmut Hans Ruhland, Jan Linsel, Moritz Klaus Springer, Thomas Lorenz
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

A system is provided for an internal combustion engine comprising, at least two cylinders wherein the at least two cylinders form at least two groups, wherein each group comprises at least one cylinder, the at least one cylinder of at least one group being formed as a cylinder which can be activated in a load-dependent manner and which is deactivated if a predefined load is undershot. The at least two groups are characterized by different cylinder volumes, the at least one cylinder of a first group having a lesser cylinder volume and the at least one cylinder of a second group having a greater cylinder volume; and the at least one cylinder of the second group comprises an activatable and deactivatable cylinder. Use of the first cylinder group, and deactivation of the second cylinder group during partial loads increases engine efficiency and fuel economy.

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Номер записи: 8
24-10-2013 дата публикации

Auto-ignition internal combustion engine with partial deactivation and method for the operation of an internal combustion engine of said type

Номер: US20130276749A1
Автор: Albert Breuer, Helmut Hans Ruhland, Jan Linsel, Moritz Klaus Springer, Thomas Lorenz
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems are provided for improving the operation of a multi-cylinder auto-ignition internal combustion engine. By configuring the cylinders in multiple groups based on compression ratios, and operating the cylinders in a load-dependent manner, fuel consumption may be improved.

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Номер записи: 9
13-02-2014 дата публикации

Control system for internal combustion engine

Номер: US20140041607A1
Автор: Eiji Takahashi, Ryosuke Hiyoshi, Shinobu Kamada
Принадлежит: Nissan Motor Co Ltd

A control system is provided with a piston TDC (top dead center) position variable mechanism and a valve operational characteristics variable mechanism. An actual distance between the valve and the piston of closest approach is calculated based on the actual operation states of these mechanisms. In addition, a limit distance of closest approach necessary to avoid interference between the valve and the piston is set, and, the piston TDC position variable mechanism and the valve operational characteristics variable mechanism are controlled to be driven to increase the actual distance.

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Номер записи: 10
13-02-2014 дата публикации

DRIVE CONTROL SYSTEM

Номер: US20140041638A1
Автор: Irisawa Yasuyuki
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

In a hybrid type vehicle designed to use an engine and motor generators to drive the vehicle, the engine is provided with a variable compression ratio mechanism and a variable valve timing mechanism. When the requested output of the engine increases, minimum fuel consumption rate maintenance control maintaining a mechanical compression ratio at a maximum mechanical compression ratio and in that state increasing the engine speed so as to satisfy the requested output of the engine and torque increase control lowering the mechanical compression ratio and increasing the engine torque are selectively performed. 1. A drive control system comprising:an engine;an output regulating system enabling setting of a desired combination of an engine torque and an engine speed giving a same engine output, wherein the output regulating system comprises a motor generator, and the motor generator operates as both an electric motor and a generator;a variable compression ratio mechanism able to change a mechanical compression ratio of the engine;a variable valve timing mechanism able to control a closing timing of an intake valve of the engine;a throttle valve arranged in an intake passage of the engine; andan electronic control unit that includes control logic which, when executed, selectively performs, in accordance with a required output of the engine when the required output of the engine increases:a minimum fuel consumption rate maintenance control that satisfies the required output of the engine by increasing the engine speed in a state maintaining the mechanical compression ratio at a predetermined compression ratio or more; anda torque increase control that increases the engine torque by controlling the closing timing of the intake valve to increase an amount of intake air into a combustion chamber while maintaining the throttle valve at a fully open state, and lowering the mechanical compression ratio to the predetermined compression ratio or less, whereina boundary output for ...

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Номер записи: 11
02-01-2020 дата публикации

SUPPORTING ARRANGEMENT FOR AN ECCENTRIC MEMBER OF AN ADJUSTING ARRANGEMENT, AND ADJUSTING ARRANGEMENT

Номер: US20200003130A1
Автор: Paul Michael
Принадлежит:

A supporting arrangement for an eccentric member () of an adjusting arrangement () of a connecting rod () of a reciprocating piston internal combustion engine having at least one piston rod () that is guided displaceably by a piston () and a seal member () is connected to the supporting piston () in a supporting cylinder () which is provided in the connecting rod () and has a longitudinal axis (). The supporting piston () enclosing at least one cylinder chamber () with the supporting cylinder (). A side () of the the supporting piston () that is directed toward the cylinder chamber () has a brake piston () that can be moved in the longitudinal axis (). The brake piston () is mounted on the supporting piston () and can be prestressed by a spring (). 1. A supporting arrangement for an eccentric member of an adjusting arrangement of a connecting rod of a reciprocating piston internal combustion engine having at least one piston rod guided displaceably by a piston and a seal that is connected to the supporting piston in a supporting cylinder that is provided in the connecting rod and has a longitudinal axis , the supporting piston enclosing at least one cylinder chamber with the supporting cylinder wherein the supporting piston has a brake piston on a side directed toward the cylinder chamber , the brake piston is mounted on the supporting piston , and is prestressed by means of prestressing means and can be moved in the longitudinal axis.2. The supporting arrangement of claim 1 , wherein the prestressing means has at least one spring member.3. The supporting arrangement of claim 2 , wherein the prestressing means is configured as a leaf spring arrangement that is supported on a wall.4. The supporting arrangement of claim 1 , wherein the brake piston has an opening arrangement configured as a nozzle.5. The supporting arrangement of claim 4 , wherein the opening arrangement is configured as a throttle opening.6. The supporting arrangement of claim 4 , wherein the opening ...

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Номер записи: 12
07-01-2021 дата публикации

Adaptive any-fuel camless reciprocating engine

Номер: US20210003087A1
Автор: Peter Sinsheimer, Raymond Mitchell Spearrin, Tsu-Chin Tsao
Принадлежит: UNIVERSITY OF CALIFORNIA

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine.

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Номер записи: 13
03-01-2019 дата публикации

Internal Combustion Engine with Improved Efficiency

Номер: US20190003405A1
Автор: Fluhler Herbert U.
Принадлежит:

A reciprocating, internal combustion engine comprises a turbine connected to the exhaust port of a cylinder. The turbine receives exhaust gas from the cylinder and a power capture means transfers the power generated by the turbine to at least one of power storage device, a turbocharger, a compressor, and vehicle locomotion. 1. A reciprocating , internal combustion engine , said engine comprising:a cylinder comprising an intake port and an exhaust port;a turbine connected to the exhaust port and configured to receive exhaust gas from the cylinder to drive the turbine; anda power capture means configured to transfer power generated by the turbine to at least one of power storage device, a turbocharger, a compressor, and vehicle locomotion.2. The engine of claim 1 , wherein the power capture means comprises one or more of an electrical power system claim 1 , a mechanical power system claim 1 , a pneumatic power system claim 1 , a compressor system claim 1 , and a hydraulic power system.3. The engine of claim 2 , wherein said power capture means is an electrical power system comprising:an electrical generator connected to the turbine,an electronic controller connected to the electrical generator, anda battery connected to the electrical generator and electronic controller.4. The engine of claim 3 , further comprising one or more of:an electric motor providing vehicle locomotion receiving power from the battery,a turbocharger receiving power from the battery, anda compressor receiving power from the battery.5. The engine of claim 2 , wherein said power capture means is a mechanical power system comprising a mechanical drive mechanically coupled to the turbine through a mechanical linkage comprising a torque converter and/or a variable ratio transmission and wherein said mechanical drive provides mechanical power to one or more of a compressor claim 2 , a turbocharger claim 2 , a generator claim 2 , and a drive system providing locomotion.6. A reciprocating claim 2 , ...

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Номер записи: 14
10-01-2019 дата публикации

CONTROL DEVICE TO ACHIEVE VARIABLE COMPRESSION RATIO FOR TRIANGLE ROTARY ENGINE

Номер: US20190010806A1
Автор: Chen Wei, FAN Baowei, LU Yao, PAN Jianfeng
Принадлежит:

The present invention provides an actuator that can realize the different compression ratios of the rotary engine. The invention actuator described above, includes three parts: the eccentric shaft part, the triangle rotor part and the control system. The eccentric shaft part which is described above, includes the front part of the eccentric shaft, the combination of electric three jaw and the rear part of the eccentric shaft. The triangle rotor part which is described above, includes the variable volume actuator, the front part of the rotor and the rear part of the rotor. The control system which is described above, includes the control system of electric three jaw and the rotating joint. The expansion and contraction of the electric three jaw described above, are controlled by the control system of electric three jaw described above. The eccentric shaft part described above passes through the triangle rotor part described above, to make the combination of electric three jaw to arrange in the annular groove described above. The reciprocating motion of the variable volume actuator described above, is controlled by the expansion and contraction of the claw top of the electric three-jaw. The invention can adjust the engine compression ratio through the whole compression ratio adjustment system, to make the rotary engine always work in the best compression ratio under different working conditions. Therefore, the invention can improve the performance of rotary engine significantly. 1. (canceled)2. The actuator of claim 6 , which can achieve different compression ratios for rotary engine claim 6 , wherein the surroundings of the variable volume plate claim 6 , is arranged with the seal groove; The seal groove described above claim 6 , is equipped with the wave spring; The sealing strip which is used as a seal between the variable volume plate and the rotor pocket claim 6 , is installed on the outside of the wave spring.3. The actuator of claim 6 , which can achieve ...

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Номер записи: 15
14-01-2021 дата публикации

VARIABLE-COMPRESSION-RATIO INTERNAL COMBUSTION ENGINE

Номер: US20210010416A1
Автор: FUJITA Hidehiro, ICHIHARA Hiroki, Ookuma Satoru
Принадлежит:

An upper oil pan assembly is attached to the lower portion of a cylinder block. An opening is formed on a side wall of the upper oil pan assembly. The variable compression ratio mechanism changes a top dead center position of a piston in accordance with the rotational position of a control shaft to thereby change the compression ratio. The control shaft is rotationally driven by an actuator. At least a portion of the actuator is fixed to a main bearing cap in a state in which at least a portion thereof is positioned on the outer side of an upper oil pan assembly. 1. A variable-compression-ratio internal combustion engine comprisinga case member that is attached to a lower portion of a cylinder block and that forms a crank chamber together with the cylinder block;a plurality of bearing members that are attached to the lower portion of the cylinder block and that, with the cylinder block, forms a crankshaft bearing portion that rotatably supports a crankshaft therebetween;a multi-link piston crank mechanism that is positioned inside the crank chamber and that changes a top dead center position of a piston in accordance with a rotational position of a control shaft to thereby change a compression ratio; andan actuator that is fixed to a plurality of the bearing members in a state in which at least a portion thereof is positioned on an outer side of the case member, and that rotationally drives the control shaft of the multi-link piston crank mechanism,the case member having an opening on a side surface along a cylinder row direction,the actuator having a fixing part that closes the opening, andthe fixing part being fixed by bolts to the plurality of bearing members from the opening.2. (canceled)3. The variable-compression-ratio internal combustion engine according to claim 1 , further comprisinga link member that is connected so as to be orthogonal to the control shaft, whereinthe actuator rotationally swings the link member to rotationally drive the control shaft ...

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Номер записи: 16
14-01-2021 дата публикации

PISTON FOR INTERNAL COMBUSTION ENGINE HAVING A TARGET, AND INTERNAL COMBUSTION ENGINE COMPRISING SUCH A PISTON

Номер: US20210010443A1
Автор: Dury Philippe, Miehe Yves
Принадлежит:

A piston for an internal combustion engine comprises a skirt defining an inner space of the piston and having a skirt bottom; and a target arranged under the skirt bottom to engage with a passage detector arranged in the engine. The target is supported by a holding body held at least partially inside the inner space of the piston. The present disclosure likewise relates to an engine comprising such a piston. 1. A piston for an internal combustion engine , comprising:a skirt defining an inner space of the piston and having a skirt bottom; anda target arranged under the skirt bottom to engage with a passage detector arranged in the engine, the target being supported by a holding body held at least partially inside the inner space of the piston.2. The piston of claim 1 , further comprising a piston pin claim 1 , wherein the holding body is held by the piston pin.3. The piston of claim 2 , wherein the holding body comprises a flexible arm.4. The piston of claim 3 , wherein the flexible arm comprises a recess allowing passage of a foot of a connecting rod.5. The piston of claim 3 , wherein the flexible arm is in forced contact with an inner surface of the skirt in two support zones diametrically opposed to each other.6. The piston of claim 1 , wherein the holding body is clipped onto the skirt bottom.7. The piston of claim 6 , wherein the holding body comprises one of a groove and a spigot claim 6 , and the skirt bottom comprises the other of the groove and the spigot claim 6 , the groove and spigot configured to engage one another.8. The piston of claim 1 , wherein the skirt bottom includes at least one notch configured to receive the target therein.9. The piston of claim 1 , wherein the target comprises a magnetic or metallic body.10. An internal combustion engine claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a piston according to ;'}a cylinder housing defining at least one cylinder and having at least one bore opening under the cylinder; anda ...

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Номер записи: 17
10-01-2019 дата публикации

Control device of engine and control method of engine

Номер: US20190010862A1
Автор: Tsuyoshi Matsuda
Принадлежит: Nissan Motor Co Ltd

An engine includes a variable compression-ratio mechanism adapted to change a compression ratio of an engine and a supercharger adapted to supply a compressed air to the engine. An engine control device that controls the engine controls the variable compression-ratio mechanism by setting target compression ratio such that the higher responsiveness of a supercharging pressure rise by the supercharger is, the lower the target compression ratio is.

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Номер записи: 18
09-01-2020 дата публикации

DEVICE FOR CONTROLLING THE COMPRESSION RATE OF A VARIABLE COMPRESSION RATIO ENGINE, COMPRISING A TWO-WAY SOLENOID VALVE PROVIDED WITH A SECONDARY CIRCUIT FOR FLUID REFILLING

Номер: US20200011254A1
Автор: Besson Francois, Bigot Sylvain, Teyssier Benjamin
Принадлежит:

A device for controlling the compression rate of a variable compression ratio engine comprises: an actuating cylinder comprising a piston defining two chambers for receiving a pressure fluid, a pressure accumulator supplying the pressure fluid, a first fluid circuit connecting the upper chamber to the accumulator and comprising a first valve assembly for controlling the flow of the fluid in the first fluid circuit, and a second fluid circuit connecting the lower chamber to the accumulator and comprising a second valve assembly for controlling the flow of a fluid in the second fluid circuit. At least one of the fluid circuits comprises a bypass conduit arranged so as to connect one of the chambers to the accumulator. The bypass conduit comprises a non-return valve. 1. A device for controlling a compression ratio of a variable compression ratio engine , comprising:an actuating cylinder comprising a piston defining two chambers intended for receiving a pressurized fluid on opposing sides of the piston;a pressure accumulator supplying the pressurized fluid;a first fluid circuit connecting a first chamber of the two chambers to the accumulator and comprising a first valve assembly for controlling the flow of the fluid in the first fluid circuit;a second fluid circuit connecting a second chamber of the two chambers to the accumulator and comprising a second valve assembly for controlling the flow of the fluid in the second fluid circuit;wherein at least one of the first fluid circuit and the second fluid circuit has a bypass conduit connecting at least one chamber of the two chambers to the accumulator, the bypass conduit including a non-return valve configured to block flow of the fluid from the at least one chamber to the accumulator.2. The device of claim 1 , wherein the bypass conduit is arranged to make a circuit parallel to the respective fluid circuit connected to the chamber to which the bypass conduit is connected.3. The device of claim 2 , wherein the bypass ...

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Номер записи: 19
09-01-2020 дата публикации

Rotational Angle Determining Device and Phase Shift Detection Method Therefor

Номер: US20200011255A1
Автор: ARAI Kazuhiko, MAMADA Hiroyuki, OOBA Shingo
Принадлежит:

A rotational angle determining device periodically samples a resolver signal output from a resolver receiving an alternating current excitation signal, the sampling being performed at a timing at which the excitation signal reaches a peak or trough value, based on a timer signal to which initial phase alignment is performed with respect to the excitation signal, and then the device performs A/D conversion of a voltage value of the sampled resolver signal, to determine the rotational angle of the rotor of the resolver. The excitation signal is periodically sampled at a predetermined timing based on the timer signal, and a presence or absence of a phase shift between the excitation and timer signals is detected based on a change in A/D converted value ADn (n=1, 2, . . . ) obtained by A/D conversion of a voltage value of the sampled excitation signal. 1. A rotational angle determining device comprising:a resolver that receives an alternating current excitation signal, and outputs an alternating current resolver signal induced by the excitation signal and having an amplitude that changes corresponding to a rotational angle of a rotor;a resolver signal converting unit that periodically samples the resolver signal at a timing at which the excitation signal reaches a peak or trough value in a case in which no phase shift has occurred between the excitation signal and a timer signal, based on the timer signal to which initial phase alignment is performed with respect to the excitation signal, and performs A/D conversion of a voltage value of the sampled resolver signal; anda rotational angle calculating unit that calculates a rotational angle of the rotor based on a first converted value obtained by the A/D conversion performed by the resolver signal converting unit,the rotational angle determining device further comprising:an excitation signal converting unit that periodically samples the excitation signal at a predetermined timing based on the timer signal, and performs A ...

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Номер записи: 20
18-01-2018 дата публикации

ACTUATOR FOR LINK MECHANISM FOR INTERNAL COMBUSTION ENGINE

Номер: US20180016972A1
Автор: NAGAI Kishiro, ONIGATA Junichiro
Принадлежит: Hitachi Automotive Systems, Ltd.

Provided is an actuator for a link mechanism for an internal combustion engine, which is capable of improving a degree of freedom in layout while reducing the number of components. The actuator for a link mechanism for an internal combustion engine according to the present invention includes a rolling bearing provided between a wave generator of a wave gear speed reducer and a housing or a motor housing. An inner ring of the rolling bearing is fixed to the wave generator. A restricting portion configured to restrict movement of an outer ring of the rolling bearing to both sides in an axial direction with respect to the housing or the motor housing is provided. 1. An actuator for a link mechanism for an internal combustion engine , the actuator comprising:a control link having one end portion coupled to the link mechanism for the internal combustion engine;a control shaft configured to change a posture of the control link through rotation;a housing configured to rotatably support the control shaft; anda wave gear type speed reducer configured to transmit a rotation speed of an output shaft of a drive motor to the control shaft after reducing the rotation speed, a circular spline provided in the housing and having internal teeth;', 'a flex spline arranged on an inner side of the circular spline and having external teeth formed on an outer periphery, the flex spline being configured to transmit the rotation to the control shaft;', 'a wave generator configured to be rotated by the output shaft of the drive motor to warp the flex spline into an ellipsoidal shape so as to partially mesh the external teeth of the flex spline with the internal teeth of the circular spline, and configured to rotate a meshed portion between the flex spline and the circular spline; and', 'a rolling bearing provided between the wave generator and the housing or a motor housing for the drive motor and including an inner ring fixed to the wave generator,, 'the wave gear type speed reducer ...

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Номер записи: 21
18-01-2018 дата публикации

BALL BEARING IN PARTICULAR CONNECTING ROD BALL BEARING AND CONNECTING ROD WITH THE BALL BEARING

Номер: US20180016974A1
Автор: Kaufmann Dietmar, Schulze Dietmar
Принадлежит:

A ball bearing including a ball head that is arranged at a support rod, wherein the ball head is supported in a ball head receiver of an exterior component, and wherein the ball head is secured at its outer surface by at least one radially inward protruding safety element of the ball head receiver against sliding out of the ball head receiver. The invention also relates to a connecting rod including the ball bearing. 1. A ball bearing , comprising:a ball head that is arranged at a support rod,wherein the ball head is supported in a ball head receiver of an exterior component, andwherein the ball head is secured at its outer surface by at least one radially inward protruding safety element of the ball head receiver against sliding out of the ball head receiver.2. The ball bearing according to claim 1 ,wherein the exterior component includes at least one recess at an outer wall, andwherein a base of the at least one recess forms a safety element at least in portions.3. The ball bearing according to claim 1 ,wherein the ball head receiver includes a cambered space which is adjoined in an axial direction by a cylindrical space, andwherein the at least one recess is arranged at a transition between the cambered space and the cylindrical space or in the cylindrical space.4. The ball bearing according to claim 2 , wherein the at least one radially inward protruding safety element is formed in that the base of the recess forms an undercut at least in a portion of the base.5. The ball bearing according to claim 1 , wherein the recess is a bore hole with a bore hole base.6. The ball bearing according to claim 1 , wherein two or more bore holes are arranged at a circumference of the exterior component.7. The ball bearing according to claim 1 , wherein the recess is provided as a ring groove in the outer wall of the exterior component.8. The ball bearing according to claim 2 ,wherein the safety element is formed by a camber of the base of the recess, andwherein the base of the ...

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Номер записи: 22
18-01-2018 дата публикации

ACTUATOR OF VARIABLE COMPRESSION RATIO MECHANISM AND ACTUATOR OF LINK MECHANISM

Номер: US20180016975A1
Автор: NAGAI Kishiro, ONIGATA Junichiro, Yamada Yoshihiko
Принадлежит: Hitachi Automotive Systems, Ltd.

An actuator of a variable compression ratio mechanism includes: a control link; an arm link; a control shaft; a housing including a receiving portion in which a connection portion between the second end portion of the control link and the arm link is received, and a support hole formed within the housing, and rotatably supporting the control shaft; and a speed reduction device, the control shaft including a fixing portion inserted and fixed within the receiving portion in a fixing hole formed in the arm link at a predetermined axial position, and a first journal portion which is formed at a tip end portion of the control shaft, which has a diameter smaller than a diameter of the fixing portion, and which is supported by a first bearing hole formed in the support hole. 1. An actuator of a variable compression ratio mechanism arranged to vary at least one of an upper dead center position and a lower dead center position of a piston of an internal combustion engine , and to vary a mechanical compression ratio , the actuator comprising:a drive motor;a control shaft arranged to be rotated by the drive motor;a member including a fixing hole to which the control shaft is fixed by a press-fit, the member being arranged to transmit a driving force of the control shaft to the variable compression ratio mechanism; anda housing including a receiving portion that receives a section in which the member is fixed to the control shaft, and that is opened in a radial direction of the control shaft, and a support hole that is opened to the receiving hole, and that rotatably supports the control shaft.2. The actuator for the variable compression ratio mechanism as claimed in claim 1 , wherein the actuator further comprises a speed reduction device which is arranged to reduce a rotation speed of the drive motor claim 1 , and to transmit the speed-reduced rotation to the control shaft; and the speed reduction device includes an inner gear which has a circular shape claim 1 , which is ...

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Номер записи: 23
18-01-2018 дата публикации

FAILURE DIAGNOSIS APPARATUS FOR VARIABLE COMPRESSION RATIO MECHANISM

Номер: US20180016995A1
Автор: KATO Naoto, MORIGUCHI Ryutaro, SHIBAIKE Yushi, SUGIHIRA Shigehiro
Принадлежит:

A failure diagnosis apparatus according to the present disclosure is applied to a variable compression ratio mechanism that can switch the compression ratio of an internal combustion engine between at least a first compression ratio and a second compression ratio lower than the first compression ratio. When the variable compression ratio mechanism is controlled so as to set the compression ratio of the internal combustion engine to the second compression ratio, the failure diagnosis apparatus advances the ignition timing of one cylinder to a knock inducing ignition timing more advanced than the MBT that does not lead to the occurrence of knock if the actual compression ratio of that cylinder is the second compression ratio but leads to the occurrence of knock if the actual compression ratio of that cylinder is the first compression ratio and diagnoses failure of the variable compression ratio mechanism on the basis of whether knock occurs or not. 1. A failure diagnosis apparatus for a variable compression ratio mechanism for use in a spark-ignition internal combustion engine provided with a variable compression ratio mechanism capable of switching the compression ratio of the internal combustion engine having a plurality of cylinders between at least a first compression ratio and a second compression ratio lower than the first compression ratio and including a compression ratio changing mechanism provided in each of the cylinders of the internal combustion engine , a knock sensor attached to the internal combustion engine , and an ignition plug attached to each of the cylinders of the internal combustion engine ,the failure diagnosis apparatus comprising:a controller comprising at least one processor configured to:perform advancing process for diagnosis to advance the ignition timing of one cylinder of the internal combustion engine to a knock inducing ignition timing more advanced than the MBT that does not lead to the occurrence of knock if the actual compression ...

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Номер записи: 24
17-01-2019 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20190017434A1
Автор: Lindner Stefan, Vogel Stefan
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine for a motor vehicle included a crankshaft, at least one piston coupled to the crankshaft for performing strokes in a cylinder as a consequence of a rotation of the crankshaft. An eccentric shaft is coupled to the crankshaft and to the piston in such a manner that through it strokes of the piston are extendable. The internal combustion engine further includes a phase adjuster for adjusting a phase of the coupling of the eccentric shaft to the crankshaft and/or a stroke adjuster for adjusting strokes of the piston, in particular an extension of strokes of the piston by the eccentric shaft. 115-. (canceled)16. An internal combustion engine for a motor vehicle , comprising:a crankshaft;a piston coupled to the crankshaft for performing strokes in a cylinder as a consequence of a rotation of the crankshaft; andan eccentric shaft coupled to the crankshaft and to the piston in such a manner that the strokes of the piston are extendable; andan adjustment mechanism selected from the group consisting of a phase adjuster configured to adjust a phase of a coupling of the eccentric shaft to the crankshaft, and a stroke adjuster configured to adjust an extension of the stroke of the piston by the eccentric shaft.17. The internal combustion engine according to further comprising a second piston coupled to the crankshaft for performing strokes in a second cylinder as a consequence of the rotation of the crankshaft claim 16 , wherein the eccentric shaft is coupled to the crankshaft and to the second piston in such a manner that the strokes of the second piston are extendable.18. The internal combustion engine according to further comprising a second stroke adjuster configured to adjust an extension of the stroke of the second piston by the eccentric shaft.19. The internal combustion engine according to claim 16 , further comprising an adjustable crank drive operably coupling the crankshaft claim 16 , the eccentric shaft and the piston.20. The internal ...

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Номер записи: 25
16-01-2020 дата публикации

Drive Apparatus and Drive Method for Brushless Motor

Номер: US20200021228A1
Автор: Hano Masaki
Принадлежит:

A drive apparatus and a drive method for a brushless motor, capable of reducing noise occurring due to pulse shift processing, is provided. The drive apparatus for the brushless motor comprises one shunt resistor and a controller. The shunt resistor measures a phase current of the three-phase brushless motor. The controller measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current. The controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value. 1. A drive apparatus for a three-phase brushless motor , comprising:a shunt resistor for measuring a phase current of the brushless motor; anda controller that measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current, in which the controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value.2. The drive apparatus for the brushless motor claim 1 , according to claim 1 , wherein the controller comprises a drive circuit that drives the brushless motor claim 1 , and a control unit that controls the drive circuit.3. The drive apparatus for the brushless motor claim 2 , according to claim 2 , wherein the drive circuit comprises a three-phase bridge circuit claim 2 , each phase of which is provided with a pair of switching elements claim 2 , the drive circuit converting a direct-current power supplied from a power source into an alternating-current power claim 2 , to supply the alternating-current ...

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Номер записи: 26
26-01-2017 дата публикации

ROTARY VALVE ENGINE

Номер: US20170022909A1
Автор: Trentham O. Paul
Принадлежит:

A reciprocating engine includes an engine body presenting an internal chamber and a fluid intake that supplies intake fluid to the internal chamber. The engine also includes a piston that oscillates within the internal chamber during engine operation. The engine body includes a block and a head that form the internal chamber. 1. A reciprocating engine comprising:an engine body presenting an internal chamber and a fluid intake that supplies intake fluid to the internal chamber;a piston that oscillates within the internal chamber during engine operation,said engine body including a head that presents a passage intersecting the internal chamber; anda head plug adjustably axially positioned at least partly within the passage, with movement of the head plug axially along the passage serving to adjust the compression ratio of the internal chamber.2. The reciprocating engine as claimed in claim 1 ,said head plug presenting a lower combustion surface that defines a plug concave opening.3. The reciprocating engine as claimed in claim 2 ,said plug concave opening defining a spherical cap shape.4. The reciprocating engine as claimed in claim 2 ,said piston presenting a side surface and an upper combustion surface that defines a piston concave opening spaced from the side surface, with the concave openings being opposed to one another.5. The reciprocating engine as claimed in claim 4 ,said concave openings each defining a spherical cap shape,said concave openings being adjacent one another and cooperatively forming an approximately spherical combustion volume within the internal chamber when the piston is located at top dead center.6. The reciprocating engine as claimed in claim 5 ,said piston concave opening comprising a semispherical opening.7. The reciprocating engine as claimed in claim 6 ,said upper combustion surface including a planar upper surface that surrounds the semispherical opening and cooperates with the engine body to define a bump clearance dimension when the ...

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Номер записи: 27
25-01-2018 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20180023486A1
Автор: YAMASHITA Yoshiyuki
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A control device of an internal combustion engine provided with a compression ratio control part controlling a mechanical compression ratio to a target compression ratio. The compression ratio control part is configured provided with an optimum compression ratio calculating part calculating an optimum compression ratio in an engine operating state based on the engine operating state, a permittable changed compression ratio calculating part calculating a permittable changed compression ratio giving an effect of improvement of the fuel efficiency even considering the amount of fuel consumed by driving a motor when the optimum compression ratio is higher than a target compression ratio, and a target compression ratio changing part changing the target compression ratio to the permittable changed compression ratio if the optimum compression ratio is higher than the target compression ratio and the optimum compression ratio becomes the permittable changed compression ratio or more. 1. A control device for an internal combustion engine for controlling an internal combustion engine provided with:an engine body; anda variable compression ratio mechanism configured to drive a motor to thereby enable change of a mechanical compression ratio of the engine body,which control device comprises a compression ratio control part configured to control the mechanical compression ratio to a target compression ratio,the compression ratio control part comprising:an optimum compression ratio calculating part configured to calculate an optimum compression ratio in the engine operating state based on the engine operating state;a permittable changed compression ratio calculating part configured to calculate a permittable changed compression ratio higher than the target compression ratio giving the effect of improvement of the fuel efficiency even if considering the amount of fuel consumed by driving the motor when the optimum compression ratio is higher than the target compression ratio; anda ...

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Номер записи: 28
25-01-2018 дата публикации

Expandable Joint for Variable Compression Ratio Engines

Номер: US20180023487A1
Автор: Mendler Edward Charles
Принадлежит:

According to the present invention an expandable joint is made without removable bearing caps by preassembling eccentric bushings onto the hinge pin. The expandable joint has a hinge type construction, but with the journals for each side of the hinge being spaced apart so that the distance between the two sides of the hinge changes with rotation of the hinge pin. The expandable joint of the present invention is assembled by sliding the hinge pin into the hinged joint with the eccentric bushings attached. Once the hinge pin is in place, the eccentric bushings are locked in place with fasteners so that they do not rotate. After the eccentric bushings are locked in place, the hinge pin can be turned to expand the joint. The expandable joint is intended for use in variable compression ratio engines, where expansion of the joint changes the compression ratio of the engine. 1246810. An eccentric hinged joint () having a first bearing housing () having a plurality of primary journal bearings () , and a second bearing housing () having a plurality of secondary journal sockets () , and{'b': 12', '14', '16, 'a hinge pin () having a plurality of primary journals () and a plurality of secondary journals (),'}{'b': 14', '18', '16', '20', '20', '18, 'said primary journals () defining a first journal axis () and said secondary journals () defining a second journal axis (), said second journal axis () being offset from said first journal axis (),'}{'b': 2', '22', '22', '10, 'wherein said eccentric hinged joint () further includes one or more eccentric bushings (), said one or more eccentric bushings () being located in said second secondary journal sockets (),'}{'b': 14', '6', '16', '22', '2, 'said primary journals () being rotatably mounted in said primary journal bearings (), and said secondary journals () being rotatably mounted in said eccentric bushings () for providing eccentric motion of the eccentric hinged joint ().'}22422102210. The eccentric hinged joint of claim 1 , ...

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Номер записи: 29
10-02-2022 дата публикации

METHOD FOR PROVIDING VARIABLE COMPRESSION RATIO IN A COMBUSTION ENGINE AND DEVICE FOR THE METHOD

Номер: US20220042467A1
Автор: Hedman Mats
Принадлежит: Hedman Ericsson Patent AB

The present invention concerns a method for providing a variable compression ratio in a combustion engine, where the combustion chamber () is formed substantially by a piston bowl in the main piston (), comprising a secondary piston () being displaceable against spring action between an upper/outer position which provides minimal volume of the combustion chamber () and lower/inner position which provides maximum volume of the combustion chamber (), or in a position therebetween depending on introduced air mass before the compression stroke. The method is characterized in arranging said secondary piston () resting on a spring () with substantially constant spring force adapted such that introduced air mass is to be compressed to a predetermined pressure at the end of the compression stroke. The invention also concerns a corresponding device and a diesel engine comprising such a device. 1. A method for providing a variable compression ratio in a diesel engine comprising a combustion chamber formed substantially by a piston bowl in a main piston , the diesel engine comprising a secondary piston being displaceable against spring action between an upper/outer position which provides minimal volume of the combustion chamber and a lower/inner position which provides maximum volume of the combustion chamber , or in a position therebetween depending on introduced air mass before a compression stroke , wherein the method comprises:arranging said secondary piston resting on a spring with substantially constant spring force adapted such that introduced air mass is compressed to a predetermined pressure at an end of the compression stroke, wherein the predetermined pressure is substantially equal when said secondary piston is in said upper/outer position and in said lower/inner position.2. The method according to claim 1 , wherein said spring force further is adapted such that the secondary piston is displaced to the lower/inner position during a working stroke when fuel is ...

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Номер записи: 30
24-01-2019 дата публикации

METHOD FOR PRODUCING A UNIT CONSISTING OF ECCENTRIC ROD AND PISTON OF A CONNECTING ROD OF AN INTERNAL COMBUSTION ENGINE

Номер: US20190024579A1
Автор: Paul Michael
Принадлежит:

A method is provided for producing an assembly of an eccentric rod () and a piston () of a connecting rod of an internal combustion engine having an adjustable compression ratio. The method includes providing an eccentric rod () having a first end () for attachment to an eccentric lever of an eccentric adjusting device of the connecting rod and a second end () for attachment to a piston () that can be guided in a hydraulic chamber of the connecting rod. The method then includes arranging the second end () of the eccentric rod () in the piston (); introducing an injection-molding tool () into the piston (); and injection-molding a circumferentially closed retaining ring () between the piston (), the second end () of the eccentric rod () and the injection-molding tool (). 1. A method for producing an assembly that includes an eccentric rod and a piston of a connecting rod of an internal combustion engine that has an adjustable compression ratio , the method comprising:providing the eccentric rod having a first end for attachment to an eccentric lever of an eccentric adjusting device of the connecting rod and a second end for attachment to a piston that is configured to be guided in a hydraulic chamber of the connecting rod;providing the piston which, in the mounted state of the connecting rod, is guided in the hydraulic chamber of the connecting rod;arranging the second end of the eccentric rod in the piston;introducing an injection-molding tool into the piston;injection-molding a circumferentially closed retaining ring between the piston, the second end of the eccentric rod and the injection-molding tool; andremoving the injection-molding tool.2. The method of claim 1 , wherein the second end of the eccentric rod is a ball head and the piston has a ball shell segment claim 1 , the step of arranging the second end of the eccentric rod in the piston comprises inserting the ball head at the second end of the eccentric rod partially into the ball shell segment in the ...

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Номер записи: 31
23-01-2020 дата публикации

METHODS AND SYSTEM FOR OPERATING AN ENGINE

Номер: US20200025113A1
Автор: Ali Imtiaz, Alobiedat Lyth, Clark Timothy Joseph, Glugla Christopher Paul
Принадлежит:

Systems and methods for operating an engine that includes a compression ratio linkage for adjusting engine compression ratio are described. The systems and methods provide different ways of changing a compression ratio of an engine based on forecast or anticipated engine operating conditions. In one example, the forecast or anticipated engine operating conditions may include a forecast or anticipated transmission gear shift. 1. An engine operating method , comprising:adjusting an engine's compression ratio via a controller responsive to present engine speed and engine load;forecasting a shifting of a transmission from a first gear to a second gear via the controller; andadjusting an engine's compression ratio via the controller responsive to an engine speed and engine load based on the forecasted shifting of the transmission.2. The method of claim 1 , where the engine's compression ratio is adjusted before the shifting of the transmission from the first gear to the second gear.3. The method of claim 2 , where adjusting the engine's compression ratio before the shifting of the transmission from the first gear to the second gear includes beginning to change the engine's compression ratio beginning at a time before the shifting of the transmission from the first gear to the second gear begins claim 2 , the time being a time the shifting of the transmission from the first gear to the second gear begins minus a time for a compression ratio changing actuator to change the engine from its present compression ratio to a compression ratio based on engine speed and engine load after shifting the transmission from the first gear to the second gear.4. The method of claim 1 , where the first gear is a higher gear than the second gear so that the shifting of the transmission from the first gear to the second gear is a downshift.5. The method of claim 1 , where the first gear is a lower gear than the second gear so that the shifting of the transmission from the first gear to the ...

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Номер записи: 32
28-01-2021 дата публикации

SYSTEM AND METHOD FOR ENGINE CONTROL WITH PRESSURE REACTIVE DEVICE TO CONTROL COMBUSTION TIMING

Номер: US20210025322A1
Автор: FLOWERS Daniel L., KILLINGSWORTH Nicholas, WHITESIDES Russell A.
Принадлежит: Lawrence Livermore National Security, LLC

The present disclosure relates to a system for controlling ignition of an intake charge directed into an internal combustion engine. The system may have a movable component operably associated with at least one of a piston of the engine or a combustion chamber of the engine. The movable component may be tuned to deflect in response to a predetermined pressure being reached in a cylinder in which the piston is housed. The movable component operates to deflect in response to the predetermined pressure being reached in the cylinder as the piston travels toward top dead center during its compression stroke, to change a compression ratio of the engine. 1. A system for controlling ignition of an air/fuel mixture intake charge directed into an internal combustion engine , the system comprising:a piston;a movable component operably associated with the piston of the engine;the movable component being tuned to move in response to a predetermined pressure being reached in the combustion chamber during movement of the piston within a cylinder of the engine, as the piston travels toward top dead center during its compression stroke, to change a compression ratio of the engine; anda dashpot operably associated with the piston for providing a biasing force which is applied to the movable component.2. The system of claim 1 , wherein the piston has a first skirt portion adapted to be coupled to a connecting rod of the engine claim 1 , and wherein the movable component comprises:a second skirt portion coupled to the first skirt portion and movable independently of the first portion; andthe second skirt portion including a crown.3. The system of claim 2 , wherein the dashpot is interposed between the first and second skirt portions to provide a biasing force against which the movable component acts claim 2 , the biasing force being overcome when the predetermined pressure is reached in the combustion chamber claim 2 , thus enabling the second skirt portion to move toward the first ...

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Номер записи: 33
04-02-2016 дата публикации

IC ENGINE CYLINDER AND PISTON

Номер: US20160032844A1
Автор: Oppermann Dean Alan, Siuchta Grzegorz
Принадлежит: International Engine Intellectual Property Company , LLC

An internal combustion engine has at least one engine cylinder which is closed at an end by a cylinder head and within which a piston reciprocates. The cylinder head has a plunger receptacle and the piston has a plunger which, when the piston is reciprocating within the engine cylinder over an engine cycle's range between BDC and an intermediate position spaced from both TDC and BDC, fully opens the plunger receptacle to the interior of the engine cylinder, and which, when the piston is reciprocating over an engine cycle's range between the intermediate position and TDC position, enters the plunger receptacle to compress an air-fuel mixture at higher compression ratio in the plunger receptacle where it is ignited and subsequently used to ignite the rest of the mixture during piston downstroke. 1. An internal combustion ignition engine comprising:an engine cylinder which has a lengthwise extending central axis and an interior within which an air-fuel mixture which has been introduced into the engine cylinder combusts to power the engine;a cylinder head closing an axial end of the engine cylinder;a piston which, during engine cycles, reciprocates axially within the engine cylinder between a TDC position and a BDC position and which comprises a piston head confronting the cylinder head;the cylinder head and the piston head collectively comprising a plunger receptacle in one of the cylinder head and the piston head, and in the other of the cylinder head and the piston head, a plunger a) which when the piston is reciprocating over an engine cycle's range between BDC position and a first intermediate position spaced from both TDC position and BDC position, fully opens the plunger receptacle to the interior of the engine cylinder, b) which when the piston is reciprocating over an engine cycle's range between the first intermediate position and a second intermediate position which is spaced between the first intermediate position and TDC position, cooperates with the ...

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Номер записи: 34
01-02-2018 дата публикации

CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20180030906A1
Автор: Eiraku Akira, HATTORI Masanori, HIRAOKA Shinichi, KAGEURA Yoshiyuki, SASAKI Keisuke, YOSHIOKA Teppei
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

To improve accuracy in misfire determination, a control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine includes a controller configured to: determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value and to make the misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed. 1. A control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine , comprising:a controller configured to:determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value; andmake said misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed.2. A control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine , comprising:a controller configured to:determine that a misfire occurs in a misfire determination target cylinder if the magnitude of rotational fluctuation is equal to or larger than a misfire criterion value, the magnitude of rotational fluctuation being the difference between a misfire correlative value with the misfire determination target cylinder defined as a cylinder for which misfire determination is performed and the ...

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Номер записи: 35
31-01-2019 дата публикации

Infinitely Variable Compression Ratio Mechanism of a Reciprocating Double-acting Piston-Type Gas Compressor

Номер: US20190032553A1
Автор: Sokalski Mark Albert
Принадлежит:

A crank-piston mechanism for a reciprocating double-acting piston-type gas compressor that allows for infinitely variable compression ratios during operations. The mechanism includes a gear pin crankshaft, a forward piston-connecting rod, a rearward piston-connecting rod, a forward crosshead, a rearward tubular crosshead, and a tandem piston assembly. The forward piston-connecting rod and the rearward piston-connecting rod are each rotatably connected to the gear pin crankshaft about two parallel but offset axes. On the opposite end, the forward piston-connecting rod and the rearward piston-connecting rod are connected to the forward crosshead and the rearward tubular crosshead, respectively. Wherein, the forward crosshead is slidably mounted within the rearward tubular crosshead. The forward crosshead is connected to a forward piston from the tandem piston assembly and the rearward tubular crosshead is connected to a rearward piston from the tandem piston assembly. The forward piston and the rearward piston are aligned for reciprocating motion. 1. An infinitely variable compression ratio mechanism of a reciprocating double-acting piston-type gas compressor comprises:a gear pin crankshaft;a forward piston-connecting rod;an at least one rearward piston-connecting rod;a forward crosshead;a rearward tubular crosshead;a forward piston shaft;a rearward piston tube;a tandem piston assembly;the forward piston-connecting rod being terminally and rotatably connected to the gear pin crankshaft about a forward piston rotation axis;the rearward piston-connecting rod being terminally and rotatably connected to the gear pin crankshaft about a rearward piston rotation axis;the forward piston rotation axis and the rearward piston rotation axis being positioned parallel and equally offset to each other;the forward crosshead being terminally and rotatably connected to the forward piston-connecting rod, opposite the gear pin crankshaft;the rearward tubular crosshead being terminally ...

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Номер записи: 36
31-01-2019 дата публикации

CONTROL METHOD AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20190032622A1
Автор: HASHIMOTO Hiroki, Kassai Masaharu
Принадлежит: NISSAN MOTOR CO., LTD.

A control method for internal combustion engine includes forming an air-fuel mixture leaner than that at a stoichiometric air-fuel ratio in a cylinder by first fuel injection, performing second fuel injection to inject fuel toward the vicinity of a discharge channel of an ignition plug during a period in which the air-fuel mixture is undergoing a low temperature oxidation reaction in a compression stroke, and after the second fuel injection, performing spark ignition by the ignition plug at a timing at which a spark of the ignition plug reaches the fuel injected by the second fuel injection. 1. A control method for internal combustion engine , comprising:forming an air-fuel mixture leaner than that at a stoichiometric air-fuel ratio in a cylinder by first fuel injection;performing second fuel injection to inject an amount of fuel to make an air-fuel ratio of the air-fuel mixture in the entire cylinder including the air-fuel mixture formed by the first fuel injection leaner than the stoichiometric air-fuel ratio toward the vicinity of a discharge channel of an ignition plug during a period in which the air-fuel mixture is undergoing a low temperature oxidation reaction in a compression stroke; andperforming spark ignition by the ignition plug at a timing at which a spark of the ignition plug reaches the fuel injected by the second fuel injection after the second fuel injection.2. The control method for internal combustion engine according to claim 1 , wherein:the internal combustion engine includes a supercharger; andsupercharging by the supercharger is performed so that the low temperature oxidation reaction occurs.3. The control method for internal combustion engine according to claim 1 , wherein:the internal combustion engine includes a variable compression ratio mechanism; anda compression ratio is increased by the variable compression ratio mechanism so that the low temperature oxidation reaction occurs.4. A control device for internal combustion engine claim 1 ...

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Номер записи: 37
04-02-2021 дата публикации

ENGINE WITH VARIABLE COMPRESSION RATIO

Номер: US20210033023A1
Автор: Makartchouk Andrei
Принадлежит:

A compression ratio varying arrangement of an engine is adapted to work with a crankshaft having at least one crankpin offset from the centerline of the crankshaft. An eccentric has an internal bore engaged with the crankpin, and an external cylindrical surface that has a centerline that is offset from the centerline of the internal bore. A connecting rod is engaged with the external cylindrical surface of the eccentric, and a piston is connected to the connecting rod. An eccentric lever is attached to the eccentric. A compression ratio adjustment link is connected to the eccentric lever. A compression ratio adjustment mechanism is connected to the compression ratio adjustment link. The compression ratio adjustment mechanism controls the orientation of the connecting rod eccentric, and thereby the compression ratio of the engine, by extending or retracting the compression ratio adjustment link. 1. A vehicle having an Engine with a Variable Compression Ratio , comprising:a crankshaft having at least one crankpin offset from the centerline of the crankshaft;a connecting rod eccentric having an eccentric internal bore engaged with the at least one crankpin, the connecting rod eccentric further having an eccentric external cylindrical surface, the eccentric external cylindrical surface having a centerline that is offset from the centerline of the eccentric internal bore;a connecting rod engaged with the eccentric external cylindrical surface of the connecting rod eccentric, and a piston connected to the connecting rod;an eccentric lever attached to the connecting rod eccentric;a compression ratio adjustment link connected to the eccentric lever; anda compression ratio adjustment mechanism connected to the compression ratio adjustment link.2. The vehicle of claim 1 , wherein:the eccentric lever extends through a connecting rod window in the connecting rod.3. The vehicle of claim 1 , wherein:the compression ratio adjustment mechanism is connected to and controlled by a ...

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Номер записи: 38
12-02-2015 дата публикации

Early exhaust valve opening for improved catalyst light off

Номер: US20150040876A1
Автор: James M. Cleeves, Michael A. Willcox
Принадлежит: Pinnacle Engines Inc

Energy to speed heating of a catalyst associated with an internal combustion engine can be provided in the form of sensible energy (heat) via hot combustion products. In some variations, timing of opening and/or closing of an exhaust valve can be manipulated to increase sensible heat delivered to the catalyst in the exhaust gases.

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Номер записи: 39
08-02-2018 дата публикации

Control system for internal combustion engine

Номер: US20180038297A1
Автор: Akira Eiraku, Keisuke Sasaki, Masanori Hattori, Shinichi Hiraoka, Teppei YOSHIOKA, Yoshiyuki Kageura
Принадлежит: Toyota Motor Corp

A control system is applied to an internal combustion engine having a plurality of cylinders, a variable compression ratio changer configured to change the compression ratio of each of the cylinders of the internal combustion engine individually, in-cylinder injection valves that inject fuel into the respective cylinders, and in-passage injection valves each of which injects fuel into an intake passage corresponding to each of the cylinders. To reduce differences in the air-fuel ratio among the cylinders during changing the compression ratio, the control system makes the proportion of the quantity of fuel injected through the in-passage injection valves to the total quantity of fuel injected through the in-cylinder injection valves and the in-passage injection valves larger during the time in which the compression ratios of all the cylinders are being changed than during the time in which the compression ratios of all the cylinders are fixed.

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Номер записи: 40
07-02-2019 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND METHOD OF ESTIMATING COMBUSTION CHAMBER-WALL TEMPERATURE OF INTERNAL COMBUSTION ENGINE

Номер: US20190040836A1
Автор: MURAI Atsushi, Sakaguchi Shigeyuki, TOYAMA Yuichi
Принадлежит: Hitachi Automotive Systems, Ltd.

In a control device for an internal combustion engine and a method of estimating a combustion chamber-wall temperature of an internal combustion engine of the invention, a difference between a wall temperature of the combustion chamber and a cooling water temperature is set according to an integrated value of the intake air amount of the internal combustion engine after start of the fuel-cut, and the estimated value of the wall temperature of the combustion chamber during the fuel-cut is obtained based on the difference and the cooling water temperature. 1. A control device for an internal combustion engine , comprising:a fuel-cut unit that performs fuel-cut for stopping supply of fuel to a combustion chamber in a deceleration operation of an internal combustion engine;a wall temperature estimating unit that estimates a wall temperature of the combustion chamber; anda combustion control unit that controls combustion of the internal combustion engine based on an estimated value of the wall temperature of the combustion chamber,the wall temperature estimating unit setting a difference between the wall temperature of the combustion chamber and a cooling water temperature according to an integrated value of an intake air amount of the internal combustion engine after start of the fuel-cut, and obtains the estimated value of the wall temperature of the combustion chamber during the fuel-cut based on the difference and the cooling water temperature.2. The control device for an internal combustion engine according to claim 1 ,wherein the wall temperature estimating unit uses a difference between the estimate of the wall temperature of the combustion chamber at the time of start of the fuel-cut and the cooling water temperature as an initial value, and reduces the difference according to an increase in the integrated value.3. The control device for an internal combustion engine according to claim 1 ,wherein the wall temperature estimating unit changes the estimated value of ...

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Номер записи: 41
12-02-2015 дата публикации

Minimizing Alcohol Use In High Efficiency Alcohol Boosted Gasoline Engines

Номер: US20150046069A1
Автор: Daniel R. Cohn, Leslie Bromberg
Принадлежит: ETHANOL BOOSTING SYSTEMS LLC

A number of systems and methods are disclosed which increase the replenishment interval for anti-knock fluid. This is especially important during activities which require a large amount of anti-knock fluid, such as towing. In some embodiments, the systems and methods are used to reduce anti-knock fluid consumption. For example, changes to engine operation, such as rich operation, spark retarding, upspeeding, and variable valve timing, all serve to reduce the amount of anti-knock fluid required to eliminate knocking. In other embodiments, the composition of the anti-knock fluid is modified, such as by using a higher octane fluid, or through the addition of water to the anti-knock fluid. In other embodiments, the replenishment interval is increased through a larger anti-knock fluid storage capacity. In one embodiment, a three tank system is used where the third tank can be used to store gasoline or anti-knock fluid, depending on the driving conditions.

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Номер записи: 42
06-02-2020 дата публикации

ACTUATOR OF VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSION ENGINE AND VARIABLE COMPRESSION RATIO APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20200040814A1
Автор: NAGAI Kishiro, SUDA Yoshihiro
Принадлежит: Hitachi Automotive Systems, Ltd.

An actuator of a variable compression ratio mechanism for an internal combustion engine includes an arm link configured to change a posture of the variable compression ratio mechanism for the internal combustion engine by swinging, a second control shaft fixed to the arm link , and a housing including a first bearing hole a supporting the second control shaft . The housing includes a lubricant oil supply oil passage opened to a pressure-receiving range over which a contact pressure is received at the first bearing hole a from the second control shaft during an expansion stroke of the internal combustion engine. 1. An actuator of a variable compression ratio mechanism for an internal combustion engine , the actuator comprising:an arm link coupled with the variable compression ratio mechanism and configured to change a posture of the variable compression ratio mechanism for the internal combustion engine by swinging;a control shaft including the arm link;an electric motor configured to rotate the control shaft; anda housing including a bearing portion that supports the control shaft, and an oil passage opened to a pressure-receiving range over which a contact pressure is received from the control shaft during an expansion stroke of the internal combustion engine in a circumferential direction of the bearing portion.2. The actuator of the variable compression ratio mechanism for the internal combustion engine according to claim 1 , wherein the control shaft is rotatable in a predetermined angular range smaller than 360 degrees claim 1 , andwherein the pressure-receiving range is a continuous single range includingone end-side pressure-receiving range over which the bearing portion receives the contact pressure from the control shaft when a rotational angle of the control shaft is located at one end of the predetermined angular range, andanother end-side pressure-receiving range over which the bearing portion receives the contact pressure from the control shaft when the ...

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Номер записи: 43
06-02-2020 дата публикации

METHODS AND SYSTEMS FOR A VARIABLE COMPRESSION ENGINE

Номер: US20200040815A1
Автор: Sampson Alan
Принадлежит:

Methods and systems are provided for adjusting a compression ratio. In one example, a system may include rotating an eccentric ring of a crankshaft by flowing hydraulic fluid to first and second chambers to actuate the eccentric ring. 1. A system comprising:a crankshaft eccentric ring comprising a first protrusion and a second protrusion rotated by hydraulic fluid in one or more of a first chamber and a second chamber.2. The system of claim 1 , wherein the first hydraulic chamber is a low compression chamber and the second hydraulic chamber is a high compression chamber.3. The system of claim 1 , wherein the eccentric ring is sandwiched between a first counterweight and a second counterweight claim 1 , and where the first chamber is arranged in the first counterweight and the second chamber is arranged in the second counterweight.4. The system of claim 1 , wherein the first protrusion contacts only hydraulic fluid in the first chamber and where the second protrusion contacts only hydraulic fluid in the second chamber.5. The system of claim 1 , wherein hydraulic fluid flow to and from the first and second chambers is proportional claim 1 , wherein an amount of hydraulic fluid flowing into the first chamber is equal to an amount of hydraulic fluid flowing out of the second chamber or vice-versa.6. The system of claim 1 , wherein the first and second chambers are identical in size and shape claim 1 , and where the first chamber comprises a first chamber opening adjacent the first extreme end and where the second chamber comprises a second chamber opening adjacent the second extreme end.7. The system of claim 6 , wherein the first protrusion and the second protrusion are rectangular prism shaped claim 6 , and where an edge of the first protrusion nearest the first chamber opening is beveled claim 6 , and where an edge of the second protrusion nearest the second chamber opening is beveled.8. The system of claim 6 , wherein there are no other inlets or additional outlets ...

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Номер записи: 44
06-02-2020 дата публикации

VARIABLE COMPRESSION RATIO APPARATUS

Номер: US20200040816A1
Автор: Choi Myungsik
Принадлежит:

A VCR apparatus may include a connecting rod at which a small end forming a hole having a circular shape to be rotatably connected with a piston pin moving together with the piston and a large end rotatably connected with a crank pin eccentrically arranged with respect to the crankshaft are formed; an eccentric cam concentrically arranged and rotatably disposed in the hole of the small end and configured so that the piston pin is eccentrically inserted thereinto and is rotatably connected therewith; a latching pin disposed in the small end to make a reciprocal rectilinear motion in a direction of rotation axis of the small end and operated to selectively latch the small end with the eccentric cam in one among at least two relative positions between the small end and the eccentric cam; and an acting oil passage formed at the connecting rod. 1. A variable compression ratio (VCR) apparatus which is mounted in an engine rotating a crankshaft upon receiving combustion power of a mixture of air and fuel from a piston and is configured to change a compression ratio of the mixture according to a driving condition of the engine , the VCR apparatus comprising: a small end portion having a circular hole to be rotatably connected to a piston pin moving with the piston; and', 'a large end portion rotatably connected to a crank pin eccentrically mounted with respect to the crankshaft;, 'a connecting rod includingan eccentric cam concentrically mounted and rotatably mounted in the circular hole of the small end portion, wherein the piston pin is eccentrically inserted into a piston pin insertion hole of the eccentric cam and is rotatably connected with the eccentric cam;a latching pin mounted in the small end portion to make a reciprocal rectilinear motion in a direction of rotation axis of the small end portion and operated to selectively latch the small end portion with the eccentric cam in one among at least two relative positions between the small end portion and the eccentric ...

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Номер записи: 45
06-02-2020 дата публикации

VARIABLE COMPRESSION RATIO APPARATUS

Номер: US20200040825A1
Автор: Choi Myungsik
Принадлежит:

A variable compression ratio apparatus is provided. The apparatus includes a connecting rod, a small end forming an aperture to be rotatably connected with a piston pin moving together with a piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft. An acting oil passage allows hydraulic pressure to be supplied from the larger end to the small end. An eccentric cam is concentrically arranged and rotatably disposed in the aperture of the small end. The piston pin is inserted thereinto and rotatably connected therewith. A latching pin is disposed in the small end to generate a reciprocal rectilinear motion in a direction of a rotation axis of the small end and selectively latches the small end with the eccentric cam in one of at least two relative positions between the small end and the eccentric cam by hydraulic pressure. 1. A variable compression ratio (VCR) apparatus installed within an engine that rotates a crankshaft upon receiving combustion power of a fuel mixture from a piston and changes a compression ratio of the mixture based on a driving condition of the engine , the VCR apparatus comprising:a connecting rod at which a small end forming an aperture having a circular shape to be rotatably connected with a piston pin moving together with the piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft, and an acting oil passage formed such that hydraulic pressure is supplied from the second end to the small end;an eccentric cam concentrically arranged and rotatably disposed in the aperture of the small end and the piston pin is eccentrically inserted thereinto and is rotatably connected therewith;a latching pin disposed in the small end to generate a reciprocal rectilinear motion in a direction of an axis of rotation of the small end and operated to selectively latch the small end with the eccentric cam in one among at least two relative positions between ...

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Номер записи: 46
16-02-2017 дата публикации

Variable compression ratio apparatus

Номер: US20170044976A1
Автор: Myung Sik Choi
Принадлежит: Hyundai Motor Co

A variable compression ratio apparatus may include a plunger configured to move up and down in response to rotation of a crank shaft, a piston having a chamber formed thereinside, into which the plunger is inserted, and configured to move up and down with the plunger, the chamber including an upper chamber formed above the plunger and a lower chamber formed below the plunger, a spool valve configured to selectively supply oil to the upper chamber or to the lower chamber, and a controller configured to control the spool valve so that the piston moves up and down with respect to the plunger.

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Номер записи: 47
14-02-2019 дата публикации

INTERNAL COMBUSTION ENGINE CONTROL APPARATUS

Номер: US20190048807A1
Автор: ORYOJI Kazuhiro, SARUWATARI Masayuki, YONEYA Naoki
Принадлежит: Hitachi Automotive Systems, Ltd.

Because an in-cylinder temperature becomes low immediately after cold starting, it is impossible to take large ignition timing retard to avoid combustion instability and it takes time to activate a catalyst existing downstream of an internal combustion engine. 1. An internal combustion engine control apparatus including an ignition timing control unit to control an ignition timing of an ignition device attached to an internal combustion engine ,the internal combustion engine control apparatus comprising: an in-cylinder temperature raising unit that raises an in-cylinder temperature, wherein the in-cylinder temperature is raised by the in-cylinder temperature raising unit and a retard amount of the ignition timing of the ignition device is increased by the ignition timing control unit.2. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit closes an exhaust valve before a top dead center in an exhaust stroke claim 1 , thereby providing an NVO period where an exhaust is compressed.3. The internal combustion engine control apparatus according to claim 2 , wherein the ignition timing of the ignition device is retarded by the ignition timing control unit after the NVO period is provided by the in-cylinder temperature raising unit.4. The internal combustion engine control apparatus according to claim 2 , wherein gas is injected into a cylinder during the NVO period and a pressure in a combustion chamber is increased.5. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit sets an intake valve closing timing to the vicinity of a bottom dead center to eliminate blowing back to an intake pipe claim 1 , in an intake stroke or a compression stroke.6. The internal combustion engine control apparatus according to claim 1 , wherein the in-cylinder temperature raising unit increases a mechanical compression ratio in a compression stroke or an ...

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Номер записи: 48
13-02-2020 дата публикации

Eccentric member and a v-type internal combustion engine

Номер: US20200049192A1
Автор: Lambertus Hendrik De Gooijer
Принадлежит: Gomecsys BV

An eccentric member for a system for varying compression ratio of an internal combustion engine comprises two circumferential bearing portions for bearing respective big ends of connecting rods of a V-type internal combustion engine. The bearing portions are eccentric with respect to an inner surface of the eccentric member and located at a distance from each other in axial direction of the eccentric member. The eccentric member also comprises two external gears between which the bearing portions are located. The eccentric member is made of two half-sleeves which are fixed to each other at least between the bearing portions.

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Номер записи: 49
22-02-2018 дата публикации

ABNORMALITY DIAGNOSTIC DEVICE FOR A VARIABLE COMPRESSION RATIO MECHANISM

Номер: US20180052077A1
Автор: ADACHI Noriyasu, KAWAI Takayoshi, Ota Tomoya, UENO Yoshio, Watanabe Hiroshi, YAMADA Aya
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An object is to carry out an abnormality diagnosis for a variable compression ratio mechanism without adding any special hardware configuration for estimating a compression ratio. An abnormality diagnostic device for a variable compression ratio mechanism adapted to be applied to an internal combustion engine comprises a controller configured to calculate a predetermined rotational speed difference which is a rotational speed difference, between an engine rotational speed at a predetermined crank angle before or after compression top dead center and an engine rotational speed in the vicinity of the compression top dead center for a predetermined cylinder at the time of carrying out fuel cut processing, set a reference range of the predetermined rotational speed difference, and make a diagnosis that abnormality has occurred in the variable compression ratio mechanism when the predetermined rotational speed difference is out of the reference range. 1. An abnormality diagnostic device for a variable compression ratio mechanism adapted to be applied to an internal combustion engine which includes:a variable compression ratio mechanism that changes a mechanical compression ratio of an internal combustion engine by changing a volume of a combustion chamber; andan engine rotational speed sensor that is configured to obtain an engine rotational speed of said internal combustion engine;said abnormality diagnostic device comprises a controller comprising at least one processor configured to:control a change of the mechanical compression ratio by means of said variable compression ratio mechanism by supplying a command signal to said variable compression ratio mechanism;calculate a predetermined rotational speed difference which is a rotational speed difference between an engine rotational speed at a predetermined crank angle before or after compression top dead center, and an engine rotational speed in the vicinity of the compression top dead center, for a predetermined ...

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Номер записи: 50
21-02-2019 дата публикации

VARIABLE COMPRESSION RATIO DEVICE AND CONTROL METHOD THEREOF

Номер: US20190055885A1
Автор: Choi Myungsik, KIM Won Gyu
Принадлежит:

A variable compression ratio device is provided. The device includes a connecting rod connected to a piston in a cylinder and an eccentric cam interposed between a piston pin and the connecting rod. The eccentric cam moves the piston vertically to vary a compression ratio according to an eccentric cam rotation position. A hydraulic controller adjusts hydraulic fluid supplied to first and second chambers formed between the eccentric cam and the connecting rod. The first chamber rotates the eccentric cam in one direction by supplied hydraulic fluid. The second chamber rotates the eccentric cam in another direction by the supplied hydraulic fluid. A position sensor senses a piston position. A compression ratio controller calculates a target compression ratio according to an operating condition of an engine, calculates a current compression ratio based on the piston, and adjusts the eccentric cam rotation position using an oil control valve. 1. A variable compression ratio device comprising:a connecting rod connected to a piston disposed in a cylinder through a piston pin;an eccentric cam interposed between the piston pin and the connecting rod, the eccentric cam moving the piston up and down to vary a compression ratio according to a rotation position of the eccentric cam;a hydraulic controller controlling hydraulic fluid supplied to each of first and second chambers formed between the eccentric cam and the connecting rod, the first chamber rotating the eccentric cam in one direction by supplied hydraulic fluid, and the second chamber rotating the eccentric cam in another direction by the supplied hydraulic fluid;a position sensor sensing a position of the piston; anda compression ratio controller calculating a target compression ratio according to an operating condition of an engine, calculating a current compression ratio based on the piston using a signal sensed by the position sensor, and controlling the rotation position of the eccentric cam through an oil control ...

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Номер записи: 51
21-02-2019 дата публикации

METHOD AND SYSTEM FOR ENGINE CONTROL

Номер: US20190055892A1
Автор: Leone Thomas G., Martin Douglas Raymond, Miller Kenneth James
Принадлежит:

Methods and systems are provided for integrating a VCR engine with a CVT transmission. Responsive to a driver demand, a controller may determine whether to maintain a current compression ratio or transition to an alternate compression ratio based on the fuel economy benefit of the transition and further based on any engine limitations that may be incurred at the engine speed-load following the transition. To improve the net fuel economy benefit while addressing the engine limitation, a compression ratio transition may be combined with a CVT adjusted engine speed-load regime, while maintaining engine power output. 1. A method for an engine coupled with a continuously variable transmission (CVT) , comprising:for a power level, comparing engine efficiency at a current compression ratio to engine efficiency at a modified compression ratio with an adjusted engine speed-load; andin response to a higher than threshold improvement in the engine efficiency at the modified compression ratio with the adjusted engine speed-load, transitioning to the modified compression ratio and adjusting to the adjusted engine speed-load.2. The method of claim 1 , further comprising claim 1 , in response to a lower than threshold improvement in the engine efficiency claim 1 , maintaining the current compression ratio.3. The method of claim 2 , further comprising adjusting the engine speed-load while maintaining the current compression ratio claim 2 , the adjusted engine speed-load with the current compression ratio different from the adjusted engine speed-load with the modified compression ratio.4. The method of claim 1 , wherein the adjusted engine speed-load with the modified compression ratio is based on a knock limit of the engine at the modified compression ratio.5. The method of claim 4 , wherein adjusting to the adjusted engine speed-load includes increasing the engine speed while decreasing the engine load to maintain the power level as engine operation at the modified compression ...

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Номер записи: 52
03-03-2016 дата публикации

APPARATUS WITH VARIABLE COMPRESSION RATIO AND VARIABLE EXPANSION RATIO

Номер: US20160061105A1
Автор: Shen Dazi
Принадлежит:

Apparatus with variable compression ratio and variable expansion ratio for an internal combustion engine, mounted on the engine crankshaft and the assembly of the piston-connecting rod, comprising an actuating motor, a worm, a worm gear, a sun gear, a first transmission shaft, a plurality of the transmission shafts, a first eccentric sleeve, a plurality of eccentric sleeve, a front gear of the first eccentric sleeve, a plurality of the front gear of the eccentric sleeve, a plurality of the rear gear of the eccentric sleeve, a planetary gear, the rear gear of the first transmission shaft, a plurality of the front gear of the transmission shaft, and a plurality of the rear gear of the transmission shaft. An angle α between the axis of the first transmission shaft and the axis of the crankshaft is not zero, the other axes of the transmission shafts with the axis of the crankshaft coincide, or parallel but do not coincide, or form a non zero angle. 1. An apparatus with variable compression ratio and variable expansion ratio for an internal combustion engine , mounted on an engine crankshaft having a first main journal and a plurality of other orderly placed main journals and a first crankpin and a plurality of other orderly placed crankpins and an assembly of a piston-connecting rod having a bearing bush on a big end of the piston-connecting rod , comprisinga first supporting cylindrical hole in a first main journal, having an angle between an axis of the first supporting cylindrical hole and the crankshaft,each of the plurality of the other orderly placed main journals is provided respectively with a supporting cylindrical hole, an axis of each supporting cylindrical hole is either coaxial with or parallel to without overlapping an axis of the crankshaft or forms a non-zero angle between the axis of each supporting cylindrical hole and the axis of the crankshaft,an actuating motor fixed on a cylinder block of an engine,a worm connected fixedly coaxially together with ...

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Номер записи: 53
03-03-2016 дата публикации

AIR SUPPLY CONCEPTS TO IMPROVE EFFICIENCY OF VCRC ENGINES

Номер: US20160061161A1
Автор: COWANS Kenneth W.
Принадлежит:

The air supply to internal combustion engines using variable compression ratio and variable fuel supply VCRC, is improved. The improvements involve increasing thermal efficiency and/or reducing production of pollutants by this engine. The improvements can also be used with other engines that are regulated by fuel supply such as two-stroke diesel engines. These improvements are directed to engines in two basic categories; those with mechanical blowers only and those with turbo charging. 119-. (canceled)20. In a two-stroke internal combustion engine of the type in which output torque is controlled by fuel delivery and in which pollutants are minimized , while efficiency is enhanced by starting sequential combustion of fuel and air in a cyclically varying expansion volume comprising a device to initiate ignition for a first phase of combustion with a substantially uniform mixture of the fuel and air , enough richer than stoichiometric to suppress the formation of oxides of nitrogen , with said cyclically varying expansion volume containing substantially all the fuel to be burned in one cycle together with only some of the air in one cycle , and with the subsequent combining of the combustion products of said first phase of combustion with all the remaining air in said one cycle to substantially complete the combustion of all the fuel in a second phase of combustion , the two-stroke internal combustion engine including:a. a blower providing air flow to said engine;b. a coupling driving said blower, said engine, said coupling being usable to control a ratio of a rotational speed of said engine to a rotational speed of said blower;c. a controllable throttle valve in the air flow out of said blower to said engine;d. a passage between the air flow out of said controllable throttle valve and the exterior air;e. a controllable vent valve located at an end of said passage remote from said controllable throttle valve, said controllable vent valve normally being closed; andf. a ...

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Номер записи: 54
01-03-2018 дата публикации

Control Device and Control Method for Vehicle Drive Mechanism

Номер: US20180058314A1
Автор: Okamoto Naoki, SHINOZAKI Yuya
Принадлежит:

The present invention relates to a control device and to a control method for a vehicle drive mechanism including a moving body having a movability range regulated by two stoppers, and a sensor which senses a position of the moving body. The control device of the present invention learns an output of the sensor corresponding to a contact state of a high-rigidity stopper, and limits, to a lower level, an operation variable of the actuator for moving the moving body toward a low-rigidity stopper along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper. Then, the control device learns the output of the sensor corresponding to the contact state of the low-rigidity stopper, and controls the actuator based on the output of the sensor learned at both the stopper positions. 1. A control device for a vehicle drive mechanism including a moving body which is movably supported , two stoppers , each of which defines an end of a movability range of the moving body , an actuator which drives the moving body in a moving direction , and a sensor which senses a position of the moving body , the control device comprising:a learning unit that learns an output of the sensor corresponding to a contact state of each of the two stoppers,wherein the learning unit executes the learning for a high-rigidity stopper of the two stoppers prior to the learning for a low-rigidity stopper of the two stoppers.2. The control device for a vehicle drive mechanism according to claim 1 ,wherein when the low-rigidity stopper is brought into the contact state, the learning unit limits an operation variable of the actuator to a lower level along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper.3. The control device for a vehicle drive mechanism according to claim 2 ,wherein the learning unit limits the operation variable for moving the moving body toward the low-rigidity ...

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Номер записи: 55
20-02-2020 дата публикации

CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20200056537A1
Автор: HOSHIKAWA Hiroaki, Kaneko Kakuzou, MORIGUCHI Yukinaga, MURAKI Kazuo
Принадлежит: NISSAN MOTOR CO., LTD.

A control method and a control device are provided for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore. A control process includes: acquiring a temperature correlating with a cylinder bore wall temperature; fixing the mechanical compression ratio to a preset compression ratio point, in response to a condition that the acquired temperature is lower than a preset temperature point; and setting the preset temperature point higher than a point corresponding to a point of the cylinder bore wall temperature at which condensed water occurs in the cylinder bore. 17.-. (canceled)8. A control method for an internal combustion engine structured to vary a mechanical compression ratio by varying a range of slide of a piston with respect to a cylinder bore , the control method comprising:acquiring a temperature correlating with a cylinder bore wall temperature;fixing the mechanical compression ratio to a preset compression ratio point, in response to a condition that the acquired temperature is lower than a preset temperature point; andsetting the preset temperature point higher than a point corresponding to a point of the cylinder bore wall temperature at which condensed water occurs in the cylinder bore.9. The control method as claimed in claim 8 , wherein the piston includes a piston crown claim 8 , a first piston ring claim 8 , and a second piston ring claim 8 , and wherein the first piston ring is closer to the piston crown than the second piston ring claim 8 , the control method comprising:setting the preset compression ratio point to an intermediate compression ratio point between a minimum compression ratio point and a maximum compression ratio point of a range of control, wherein the first piston ring is higher in position when the mechanical compression ratio is at the preset compression ratio point than the second piston ring when the mechanical compression ratio is ...

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Номер записи: 56
20-02-2020 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20200056553A1
Автор: SARUWATARI Masayuki, YONEYA Naoki
Принадлежит: Hitachi Automotive Systems, Ltd.

There is a problem of a difficulty in estimating the temporal change of the MBT for each of cylinders with light calculation load and high accuracy. An object of the present invention is to provide a control device capable of detecting a temporal change in the fuel efficiency optimum ignition timing (MBT) for each of cylinders. Therefore, the control device for internal combustion engine includes a control unit (CPU) that estimates an optimum ignition timing of each of cylinders from the relationship between the phase angle (θTmax) at which the torque peaks and the phase angle (θPmax) at which the in-cylinder pressure peaks with respect to the ignition timing of the cylinder. 1. A control device for internal combustion engine comprising:a control unit (CPU) that estimates an optimum ignition timing of each of cylinders from the relationship between a phase angle (θTmax) at which a torque peaks and a phase angle (θPmax) at which an in-cylinder pressure peaks with respect to the ignition timing of the cylinder.2. The control device for internal combustion engine according to claim 1 , wherein the control unit changes each ignition timing during engine operation claim 1 , and plots a crank angle at which the in-cylinder pressure peaks during combustion of a certain cylinder and a crank angle at which combustion torque peaks on a two-dimensional map claim 1 , and sets the ignition timing when a slope of the combustion torque peak crank angle with respect to in-cylinder pressure peak crank angle changes claim 1 , as an estimated value of the optimum ignition timing.3. The control device for internal combustion engine according to claim 1 , wherein the control unit corrects a combustion parameter based on the estimated optimum ignition timing.4. The control device for internal combustion engine according to claim 3 , wherein the combustion parameter to be corrected is at least one or more of ignition timing claim 3 , fuel injection amount claim 3 , ignition energy claim 3 ...

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Номер записи: 57
10-03-2016 дата публикации

Control device for spark-ignition engine

Номер: US20160069280A1
Автор: Kyohei Yasuda, Takafumi Nishio, Tomomi Watanabe
Принадлежит: Mazda Motor Corp

A controller (an engine controller 100 ) feeds a fuel into a cylinder 11 through a fuel feeder (including a fuel injection valve 53 and a fuel feeding system 54 ) when the cylinder 11 is in an intake stroke and a compression stroke and if an engine body (an engine 1 ) is both in a cold running phase and under a heavy load. The engine body at or below a predetermined temperature is in the cold running phase. The load applied to the engine body is heavy when the engine body is under at least a predetermined load. The controller also lowers the upper limit of the charging efficiency of the engine body as the vaporization rate of the fuel fed into the cylinder decreases.

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Номер записи: 58
27-02-2020 дата публикации

Crank Drive for a Reciprocating-Piston Engine and a Reciprocating Piston Engine with Such a Crank Drive

Номер: US20200063655A1
Автор: GUTZER Ulrich
Принадлежит:

A crank drive for a reciprocating-piston engine includes a crankshaft which has at least one crank pin. At least one eccentric is rotatably arranged on the crank pin via which at least one connecting rod is to be rotatably mounted on the crank pin. A piston can be arranged so as to move in a translatory fashion in a cylinder having a variable compression ratio of the reciprocating-piston engine and can be coupled in an articulated fashion via the connecting rod to the crankshaft. At least one actuator shaft is arranged coaxially with respect to the crankshaft, by which actuator shaft the eccentric can be rotated relative to the crank pin by driving the actuator shaft. As a result, the compression ratio of the cylinder can be adjusted. An actuator element, by which the actuator shaft can be driven, is arranged at one end of the crankshaft and adjoins the actuator shaft in the axial direction of the crankshaft. 1. A crank drive for a reciprocating piston engine , comprising:a crankshaft having at least one crankpin journal;at least one eccentric arranged rotatably on the crankpin journal and via which a connecting rod is mounted rotatably on the crankpin journal, by which connecting rod a piston arrangeable so as to move translationally in a cylinder having a variable compression ratio is couplable to the crankshaft in an articulated manner;at least one actuating shaft arranged coaxially with respect to the crankshaft and via which the eccentric is rotatable relative to the crankpin journal by driving the actuating shaft, as a result of which the compression ratio of the cylinder is settable; andan actuator by which the actuating shaft is driven, whereinthe actuator is arranged at one end of the crankshaft and adjoins the crankshaft in an axial direction of the crankshaft.2. The crank drive according to claim 1 , whereinthe actuating shaft penetrates at least one main bearing journal of the crankshaft completely in the axial direction of the crankshaft.3. The crank ...

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Номер записи: 59
17-03-2016 дата публикации

VARIABLE COMBUSTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20160076436A1
Автор: Nakamura Makoto
Принадлежит: Hitachi Automotive Systems, Ltd.

A variable combustion system for an internal combustion engine, which suppresses mechanical compression ratio change control by a variable mechanical compression ratio control mechanism and carries out internal EGR amount change control by a variable valve actuating control mechanism on a preferential basis in a first operating region in which a compression self-ignition combustion is carried out, and which suppresses the internal EGR amount change control by the variable valve actuating control mechanism and carries out the mechanical compression ratio change control by the variable mechanical compression ratio control mechanism on a preferential basis in a second operating region in which a spark ignition combustion is carried out. 1. A variable combustion system for an internal combustion engine , comprising:a variable valve actuation control mechanism configured to control an internal EGR amount to a combustion chamber of an internal combustion engine;a variable mechanical compression ratio control mechanism configured to control a mechanical compression ratio in the combustion chamber; anda control device configured to switch a combustion form of a mixture in the combustion chamber of the internal combustion engine to any one of compression self-ignition combustion and spark ignition combustion and to control the variable valve actuating control mechanism and the variable mechanical compression ratio control mechanism,wherein the control device suppresses mechanical compression ratio change control by the variable mechanical compression ratio control mechanism and carries out internal EGR amount change control by the variable valve actuating control mechanism on a preferential basis in a first operating region in which the compression self-ignition combustion is carried out, andthe control device suppresses the internal EGR amount change control by the variable valve actuating control mechanism and carries out the mechanical compression ratio change control by ...

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Номер записи: 60
17-03-2016 дата публикации

Internal combustion engine control device and control method

Номер: US20160076465A1
Автор: Shinobu Kamada, Sho OHTSU, Taisuke IKARI
Принадлежит: Nissan Motor Co Ltd

A target compression ratio ε(t+Tact) after a prescribed time Tact has expired from a current point of time is calculated from an intake air volume drawn into a cylinder after expiration of the prescribed time Tact from the current point of time. A control command to an electric motor that drives a variable compression ratio mechanism is calculated so as to bring an actual compression ratio εr(t+Tact) after the prescribed time Tact into accordance with the target compression ratio ε(t+Tact) after the prescribed time Tact. This enables the actual compression ratio to follow the target compression ratio accurately.

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Номер записи: 61
07-03-2019 дата публикации

LINK MECHANISM ACTUATOR FOR INTERNAL COMBUSTION ENGINE

Номер: US20190072044A1
Автор: NAGAI Kishiro, ONIGATA Junichiro, SUDA Yoshihiro
Принадлежит: Hitachi Automotive Systems, Ltd.

Provided is an actuator for a link mechanism for an internal combustion engine, which is capable of enhancing the durability of a wave gear type speed reducer or a bearing portion. The actuator for a link mechanism for an internal combustion engine according to the present invention includes: a housing including a bearing portion configured to support a control shaft so that the control shaft is rotatable; and the wave gear type speed reducer configured to reduce a rotation speed of an output shaft connected to a drive motor, and to transmit the reduced rotation speed to the control shaft. A restricting mechanism is provided to one of the control shaft and the housing, and is configured to restrict movement of the control shaft toward the wave gear type speed reducer side in an axial direction by being brought into contact with another of the control shaft and the housing. 1. An actuator for a link mechanism for an internal combustion engine , the actuator comprising:a control shaft, which is to be coupled to the link mechanism for an internal combustion engine, and is configured to change a posture of the link mechanism through rotation;a housing including a bearing portion configured to rotatably support the control shaft;a drive motor configured to rotationally drive an output shaft;a wave gear type speed reducer configured to reduce a rotation speed of the output motor, and to transmit the reduced rotation speed to the control shaft; anda restricting mechanism, which is provided to one of the control shaft and the housing, and is configured to restrict movement of the control shaft toward the wave gear type speed reducer side in the axial direction by being brought into contact with another of the control shaft and the housing.2. An actuator for a link mechanism for an internal combustion engine according to claim 1 ,wherein the control shaft includes an arm to be coupled to the link mechanism,wherein the housing has a recessed portion that is capable of ...

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Номер записи: 62
05-03-2020 дата публикации

CAM ROTARY ENGINE POWER SYSTEM OF INTERNAL COMBUSTION TYPE

Номер: US20200072133A1
Автор: BIAN Yongning, HONG Pengfei, SUN Shoulin, WANG Lin, Yang Yang, ZHANG Guanglin
Принадлежит:

A cam rotary engine power system of internal combustion type, making use of the cam and a plurality of cam followers to form cam mechanisms, and forming a plurality of circumferential distributed sealing working chambers with the inner-cavity-member, the external-rotating-surface-member and the end-cover-member. The volume of those chambers change with the relative rotation of the cam and the cam followers, in which the intake, compression, power and exhaust processes of the Otto cycle are completed by valve coordination. The chemical energy produced by gas combustion is directly converted into the mechanical energy of the rotor in the form of fixed axis rotation. The power system does not set the crankshaft of piston engine, and the high pressure gas directly drives the rotor to rotate and output power. The structure of this power system is relatively simple and its parameters can be adjusted in a wide range. 1. A power system of cam rotary internal combustion engine , comprising an inner cavity member , an external rotating surface member , a cam , end cover members , cam followers , valves and valve controllers; wherein , rise and fall intervals of the cam's contour profile causing size change of the cam surface , an annular clearance with varied dimension being formed by encircling the cam with the inner surface of the inner cavity rotating surface member , the outer surface of the external rotating surface member and the end cover members , in which the coupled surfaces form the contact sealing relationship except the cam contour profile; the cam being fixed with one of the inner cavity member or the external rotating surface member and rotated relative to the other; a set of cam followers being installed on the inner cavity member or the external rotating surface member which is not fixed with the cam , sealing contact being formed by a higher pair joints between the cam followers and the smooth cam contour profile surface , so as to separate the annular ...

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Номер записи: 63
18-03-2021 дата публикации

Crankshaft and conrod assembly

Номер: US20210079839A1
Автор: Christer Odenmarck, Fredrik Strömstedt, Peter Petrov
Принадлежит: Volvo Car Corp

A crankshaft and conrod assembly (100) comprising a crankshaft (110) and a conrod (150), wherein the crankshaft (110) comprises at least one main journal (111) and one crankpin journal (112), where the crankshaft (110) is provided with an oil supply structure for supplying the crankpin journal (112) with lubrication oil and the conrod (150) with an oil pressure, wherein the oil supply structure comprises: an oil supply conduit (113) provided between the main journal and the crankpin journal (112), at least a first and a second oil supply opening (114, 115) provided at the crankpin journal (112), and a connection point (116) where the oil supply conduit (113) connects to the first and second oil supply opening (114, 115).

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Номер записи: 64
26-03-2015 дата публикации

FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20150083085A1
Автор: Hoolahan Richard Matthew, Ravenhill Paul Bartholomew
Принадлежит:

With reference to FIG. the present invention provides an internal combustion engine comprising a variable volume combustion chamber (), an air intake passage (), a throttle (), a bypass passage () which bypasses the throttle () and via which air and/or recirculated exhaust gas is supplied to the intake passage () via a delivery nozzle () located downstream of the throttle (). A fuel injector () delivers fuel to a mixing chamber and the bypass passage () is connected to the mixing chamber so that air or recirculated exhaust gas flowing through the bypass chamber entrains fuel present in the mixing chamber and a resulting mixture is delivered to the intake passage () via the delivery nozzle (). 1. An internal combustion engine comprising:a variable volume combustion chamber;an air intake passage supplying air to the combustion chamber via an air intake valve;a throttle provided in the air intake passage for throttling flow of air through the air intake passage;a venture formed in the air intake passage downstream of the throttle;a bypass passage which bypasses the throttle and via which air and/or recirculated exhaust gas is supplied to the venture of the intake passage via, a delivery outlet located in a throat of the venturi;a fuel injector;fuel and air mixing means comprising a bypass flow chamber, connected to the bypass passage, surrounding a mixing chamber, the mixing chamber being enclosed within the bypass flow chamber and arranged such that the fuel can accumulate in and fill up the mixing chamber for subsequent entrainment; anda control unit operatively associated with the injector and the intake valve to deliver fuel from the fuel injector to the mixing chamber while the air intake valve is closed;wherein the bypass passage is connected to the fuel and air mixing means so that air or recirculated exhaust gas flowing through the bypass passage passes through the mixing chamber, entrains fuel present in the mixing chamber and a resulting mixture is delivered ...

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Номер записи: 65
12-06-2014 дата публикации

Variable cycle engine

Номер: US20140158067A1
Автор: Byong Young Choi, Gee Wook Shin, Jei Choon Yang, Jin Kook Kong, Soo Hyung Woo, Wonjun Lee, Young Hong Kwak
Принадлежит: Hyundai Motor Co

A variable cycle engine may include a first cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a second cylinder that performs an intake, a compression, an explosion, or an exhaust stroke, a connection rail that is formed near the first cylinder and the second cylinder, a first variable port that is diverged from one side of the connection rail and is connected to the first cylinder, a second variable port that is diverged from the other side of the connection rail and is connected to the second cylinder, and a first variable control valve disposed on the first variable port and a second variable control valve disposed on the second variable port, wherein the first and second variable control valves are opened or closed accordingly with respect to each other to directly connect the first cylinder with the second cylinder.

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Номер записи: 66
14-03-2019 дата публикации

CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20190078511A1
Автор: Okamoto Kazuhiko, Takahashi Eiji
Принадлежит: NISSAN MOTOR CO., LTD.

A control method for an internal combustion engine which includes a variable compression ratio mechanism: controlling the compression ratio by using a control target compression ratio whose a variation amount per unit time is limited to be equal to or smaller than a predetermined variation amount threshold value; and setting a first variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a high compression ratio side, to be smaller than a second variation amount threshold value which is the variation amount threshold value of the control target compression ratio per unit time toward a low compression ratio side. 1: A control method for an internal combustion engine which includes a variable compression ratio mechanism which is arranged to vary a compression ratio , and in which a target compression ratio is varied at the variation of the compression ratio so that an actual compression ratio cannot follow the target compression ratio , the control method comprising:controlling the compression ratio by using a control target compression ratio whose a variation amount per unit time is limited to be equal to or smaller than a predetermined variation amount threshold value, and which is varied so that a difference between the control target compression ratio and the actual compression ratio is smaller than a difference between the target compression ratio and the actual compression ratio, in place of the target compression ratio; andsetting a first variation amount threshold value which is the variation amount threshold value of the control target compression ratio toward a high compression ratio side, to be smaller than a second variation amount threshold value which is the variation amount threshold value of the control target compression ratio toward a low compression ratio side.23-. (canceled)4: The control method for the internal combustion engine as claimed in claim 1 , wherein the ...

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Номер записи: 67
23-03-2017 дата публикации

Variable compression ratio piston machine and method for adjusting the variable compression ratio piston machine

Номер: US20170082021A1
Автор: Paul GRZESCHIK, Uwe Schaffrath
Принадлежит: FEV GmbH

The present invention relates, in particular, to a variable compression ratio (VCR) piston machine comprising a crankshaft, at least one connecting rod, which is rotatably mounted on the crankshaft, wherein the connecting rod has a small bearing eye and a large bearing eye, and wherein the connecting rod has a connecting rod shaft, further comprising a compression piston, which is arranged on the connecting rod, preferably a combustion chamber piston which can be adjusted by means, for example, of an eccentric or some other adjusting element and of an adjustment system, preferably an adjustment linkage, wherein the adjustment system is supported by means of at least one support piston, which can be moved in a support cylinder of the connecting rod. A proposal is furthermore made for a method in which an adjustment accomplished by external forces acting on the adjustment system is supplemented or improved by additional adjustment forces.

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Номер записи: 68
12-03-2020 дата публикации

VARIABLE COMPRESSION RATIO ENGINE WITH MECHANICAL LOCKING PIN

Номер: US20200080473A1
Автор: Brevick John Edward, Chottiner Jeffrey
Принадлежит:

Methods and systems are provided for a VCR engine. In one example, the VCR engine includes a VCR mechanism that relies on electric power to adjust a compression ratio of the VCR engine. The compression ratio is maintained by hydraulically-assisted engagement of a mechanical locking pin with an S-link of the VCR mechanism, holding a position of the VCR mechanism while an electric motor, used to adjust a position of the S-link, may be deactivated. 1. A variable compression ratio (VCR) mechanism comprising;an S-link including a plurality of apertures and coupled to a control shaft and attached to an electric motor;a locking pin configured to alternate between a first position and a second position, the locking pin inserted through an aperture of the plurality of apertures when in the first position; anda hydraulic device configured to selectively maintain the locking pin in the first position.2. The VCR mechanism of claim 1 , wherein the electric motor actuates a translational motion of the S-link and the translational motion is converted into rotational movement of the control shaft.3. The VCR mechanism of claim 1 , wherein the plurality of apertures of the S-link are through-holes extending entirely through a thickness of the S-link and disposed along a length of the S-link claim 1 , the length perpendicular to the thickness and parallel with a direction of the translational motion of the S-link.4. The VCR mechanism of claim 3 , wherein when the locking pin is moved into the first position claim 3 , a first end of the locking pin is inserted through the aperture and into a non-moving component of a structure housing the VCR mechanism.5. The VCR mechanism of claim 4 , wherein when the locking pin is in the second position claim 4 , the locking pin is not engaged with the aperture and the locking pin is positioned within an oil chamber of the hydraulic device.6. The VCR mechanism of claim 5 , wherein when the locking pin is in the first position claim 5 , a spring in ...

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Номер записи: 69
21-03-2019 дата публикации

Control Device and Control Method for Vehicle Drive Mechanism

Номер: US20190085762A1
Автор: Okamoto Naoki, SHINOZAKI Yuya
Принадлежит:

The present invention relates to a control device and to a control method for a vehicle drive mechanism including a moving body having a movability range regulated by two stoppers, and a sensor which senses a position of the moving body. The control device of the present invention learns an output of the sensor corresponding to a contact state of a high-rigidity stopper, and limits, to a lower level, an operation variable of the actuator for moving the moving body toward a low-rigidity stopper along with an increase in an amount of change in the output of the sensor from the contact state of the high-rigidity stopper. Then, the control device learns the output of the sensor corresponding to the contact state of the low-rigidity stopper, and controls the actuator based on the output of the sensor learned at both the stopper positions. 1. A control device for a vehicle drive mechanism including a moving body which is movably supported , two stoppers , each of which defines an end of a movability range of the moving body , an actuator which drives the moving body in a moving direction , and a sensor which senses a position of the moving body , the control device comprising:a learning unit that learns an output of the sensor corresponding to a contact state of each of the two stoppers,wherein the learning unit executes learning for a first stopper of the two stoppers prior to learning for a second stopper of the two stoppers, the first stopper having a higher rigidity than the second stopper,wherein, while the moving body is brought into contact with the first stopper, an operation variable of the actuator is limited so as not to exceed a first upper limit value,wherein, while the moving body is brought into contact with the second stopper, the operation variable is limited so as not to exceed a second upper limit value, which is lower than the first upper limit value, andwherein, while the moving body rebounds off the second stopper and moves toward the first stopper, ...

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Номер записи: 70
30-03-2017 дата публикации

POSITIONING THE SWITCHING ELEMENT FOR A MECHANICALLY SWITCHED VCR CONNECTING ROD

Номер: US20170089257A1
Автор: Grzeschik Paul, Müller Christoph, Schaffrath Uwe
Принадлежит:

The invention relates to an internal combustion engine having an adjustable variable compression ratio, a crankshaft having a crankshaft center line and at least one counterweight, which has an extent with a maximum distance from the crankshaft center line, at least one connecting rod, an adjusting mechanism for adjusting the adjustable variable compression ratio, a switchover element for switching the adjusting mechanism, wherein the switchover element is arranged on the connecting rod, and an actuating element for switching over the switchover element from a first position, which corresponds to a first compression ratio, into a second position. 1. A reciprocating piston engine , in particular an internal combustion engine , having a variable compression ratio , comprising:a housing;a crankshaft rotatably mounted on the housing and having at least one crankpin and a balance weight, the outer circumferential contour of the crankshaft which is radially furthest away from the crankshaft center line describes an orbital path when the crankshaft rotates;a compression piston which is supported by a connecting rod and is guided in such a way as to be movable bidirectionally within a cylinder formed in the housing;an adjusting mechanism which is arranged on the connecting rod for adjusting a compression ratio by selectively releasing and/or blocking and/or assisting a movement of the compression piston relative to the connecting rod;a switch which is arranged on and/or in the connecting rod having a switchover element which can be actuated, in particular mechanically, for transferring the switch out of a first switching position, which corresponds to a first compression ratio, into at least one second switch position, which corresponds to a second compression ratio different from the first compression ratio, and vice versa; and wherein the connecting rod has, in the region around a crankshaft connecting-rod bearing, a connecting rod portion which, during a revolution of ...

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Номер записи: 71
05-05-2022 дата публикации

Variable compression ratio device

Номер: US20220136431A1
Автор: Almir Gonçalves Pereira, Paulo Roberto De Oliveira
Принадлежит: Individual

The present invention relates to an electromechanical device for incorporation into the design and manufacture of internal combustion engines, which comprises the joining of two specific mechanisms, the first being an elaborate mechanism, called the cam actuator, which makes it possible, through the movement of these cams, to alter, under the control of an electronic control unit, the relative position of the crankshaft with respect to the top dead center of the pistons, inside the cylinder, increasing or decreasing the compression ratio according to the requirements of the engine. The second mechanism is the rotational coupler, formed by an internally-toothed gear, the ring gear, and a shaft with external gear teeth, the sprocket, to be applied at one or both ends of the crankshaft of the engines.

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Номер записи: 72
05-05-2022 дата публикации

Upspeeded Operation Of Alcohol-Enabled Gasoline Engines

Номер: US20220136449A1
Автор: Bromberg Leslie, Cohn Daniel R.
Принадлежит:

Spark ignition engine operation at higher RPM so as to reduce alcohol requirements in high efficiency alcohol enhanced gasoline engines is disclosed. Control of engine upspeeding (use of a higher ratio of engine RPM to wheel RPM) so as to achieve an alcohol reduction objective while limiting any decrease in efficiency is described. High RPM alcohol enhanced gasoline engine operation in plug-in series hybrid powertrains for heavy duty trucks and other vehicles is also described.

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Номер записи: 73
19-03-2020 дата публикации

Variable Compression Ratio Engine by Hydraulic-Mechanical Mechansim

Номер: US20200088117A1
Автор: ElZein Ali Abed-Ali
Принадлежит:

Variable compression ratio (VCR) in reciprocating internal combustion engine must be achieved in very short time or in less than 10 degrees from TDC. To accomplish this a closed-circuit system of hydraulic cylinder pump-follower driven by End-Cam, centered on the crankshaft journal, and a hydraulic jack linked to a mechanical scissor jack. This arrangement speeds up the VCR action while reduces pressure load on the VCR mechanism and allows for higher compression ratio. The rotation of the End-Cam with respect to the hydraulic cylinder pump engages the plunger-follower with the Cam rise/lift at TDC. Then starts pumping oil to the hydraulic jack that is linked to the scissor jack and lift/push up the engine piston. Addition of an actuator to the End-Cam advances or delays VCR action. This hydraulic-mechanical system is compact is size with options for various mechanical linkages and customizable in different ways that two configurations are presented. 1a rise and return hydraulic cylinder pumps with plungers follow an End-Cam and a hydraulic jack;a fixed or actuated End-Cam with/without outer groove leading to composite End-Face-Cam;a customized mechanical linkage to hydraulic jack with preference of scissor jack type; anda Face-Cam with two concentric semi-circle grooves as an additional or sole mechanical VCR driving the mechanical, scissor, linkage.. A variable compression ratio mechanism of a reciprocating internal combustion engine, comprising: This application claims the benefit of and takes priority from U.S. Provisional Application Ser. No. 62/732,286 filed on Sep. 17, 2018, the contents of which are herein incorporated by reference.The present invention generally relates to a reciprocating internal combustion engine with a variable compression ratio using hydraulic-mechanical mechanism capable of shifting-up the TDC position towards the head cylinder, hence reduces clearance volume and increases the compression ratio of the engine.Variable compression ratio ...

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Номер записи: 74
01-04-2021 дата публикации

CONTROL METHOD OF VARIABLE STROKE ENGINE FOR REFORMING HIGH-OCTANE FUEL UNDER THE FLEXIBLE CYLINDER ENGINE (FCE) MODE

Номер: US20210095604A1
Автор: Liu Haifeng, MI Shan, Wang Hu, Wang Yang, YAO Mingfa, ZHENG Zunqing
Принадлежит:

The present invention discloses a control method of variable stroke engine for reforming high-octane fuel under the FCE mode, the ECU connected to the engine controls the amount of fuel injected from the flexible cylinder injector to the flexible cylinder and controls the switch state of inlet valve and exhaust valve of the flexible cylinder, so that the flexible cylinder can be switched between two-stroke mode and four-stroke mode according to the actual engine operating conditions; when the engine is at a small load and needs to promote combustion stability, the flexible cylinder injector injects a rich fuel with equivalence ratio greater than 1 into the flexible cylinder, the flexible cylinder is at two-stroke mode; when the engine is at a large load and needs sufficient power output, the flexible cylinder injector injects a conventional fuel into the flexible cylinder, said flexible cylinder is at four-stroke mode. 1. A control method of variable stroke engine for reforming high-octane fuel under a flexible cylinder engine (FCE) mode , wherein{'b': 7', '8, 'the variable stroke engine comprises an air inlet system, a plurality of working cylinders () and at least one combustion flexible cylinder ();'}{'b': 13', '12', '9', '12', '21', '9, 'the air inlet system comprises a turbine (), a supercharger (), a main air inlet pipe () connected to the supercharger (), and a three-way air inlet valve () provided on the main air inlet pipe ();'}{'b': 9', '21', '2', '1', '9', '2', '2', '1, 'the main air inlet pipe () is divided into two ways via the three-way air inlet valve (), one is a working cylinder air inlet pipe (), the other is a flexible cylinder air inlet pipe (), a working loop is arranged between the main air inlet pipe () and the working cylinder air inlet pipe (), and a fuel reforming loop is arranged between the working cylinder air inlet pipe () and the flexible cylinder air inlet pipe ();'}{'b': 1', '19', '8', '17', '8', '18', '20', '3', '18', '20', '8', '3, ...

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Номер записи: 75
05-04-2018 дата публикации

REDUCING UNBURNED HYDROCARBON EMISSIONS IN GASEOUS FUELLED LEAN-BURN ENGINES

Номер: US20180094594A1
Автор: Hill Philip G., McTaggart-Cowan Gordon P., Patychuk Bronson D., Wu Ning
Принадлежит:

It is a challenge to reduce unburned hydrocarbon emissions for gaseous fuelled engines, especially at low engine load conditions, to meet demanding emission regulation targets. A method for reducing unburned hydrocarbon emissions in a lean-burn internal combustion engine that is fuelled with a gaseous fuel comprises adjusting the timing for closing of an intake valve as a function of engine operating conditions by one of advancing timing for closing of the intake valve and closing the intake valve earlier during an intake stroke; and retarding timing for closing of the intake valve and closing the intake valve later during a compression stroke. The volumetric efficiency of the internal combustion engine is reduced and unburned hydrocarbon emissions are maintained below a predetermined level. 1. A method for reducing unburned hydrocarbon emissions in a lean-burn internal combustion engine that is fuelled with a gaseous fuel , the method comprising:adjusting the timing for closing of an intake valve as a function of engine operating conditions by one of:advancing timing for closing of the intake valve and closing the intake valve earlier during an intake stroke; andretarding timing for closing of the intake valve and closing the intake valve later during a compression stroke;wherein the volumetric efficiency of the internal combustion engine is reduced and unboned hydrocarbon emissions are maintained below a predetermined level.2. The method of claim 1 , wherein the engine operating conditions comprise engine load.3. The method of claim 2 , further comprising at least one of:adjusting the timing for closing the intake valve when the engine load is less than 20 50% of full engine load conditions;advancing the timing for closing the intake valve between 20 and 90 crank angle degrees; andretarding the timing for closing the intake valve between 20 and 90 crank angle degrees.4. The method of claim 2 , further comprising maintaining a higher boost pressure when the engine ...

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Номер записи: 76
28-03-2019 дата публикации

Boosted engine

Номер: US20190093575A1
Автор: Atsushi Inoue, Keiji Araki
Принадлежит: Mazda Motor Corp

A boosted engine is provided, which includes an engine body formed with a combustion chamber, a spark plug, a fuel injection valve, a booster, a boost controller, and a control unit including an operating range determining module and a compression end temperature estimating module. In a high load range, the fuel injection valve and the spark plug are controlled so that a mixture gas inside the combustion chamber starts combustion through flame propagation by ignition of the spark plug, and unburned mixture gas then combusts by compression ignition, and the boost controller is controlled to bring the booster into a boosting state. When a gas temperature inside the combustion chamber exceeds a given temperature at CTDC, the fuel injection valve is controlled so that a fuel injection end timing occurs on a compression stroke, and the spark plug is controlled so that the mixture gas is ignited after CTDC.

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Номер записи: 77
06-04-2017 дата публикации

Control Device and Control Method for Internal Combustion Engine

Номер: US20170096949A1
Автор: KIYOMURA Akira, Okamoto Naoki, SHINOZAKI Yuya
Принадлежит:

A control device for an internal combustion engine including a variable compression ratio mechanism for changing a compression ratio by using an electric actuator prohibits control of changing the compression ratio to a higher compression ratio when a failure occurs in the variable compression ratio mechanism. Thereby, upon failure occurrence, the compression ratio of the variable compression ratio mechanism at the time of the failure occurrence is maintained or reduced to less than this compression ratio so as to protect the electric actuator and prevent abrupt changes in torque. 114.-. (canceled)15. A control device for an internal combustion engine including a variable compression ratio mechanism for changing a compression ratio by using an electric actuator , whereinwhen a failure occurs in the variable compression ratio mechanism, the control device prohibits control of changing the compression ratio to a higher compression ratio, andthe control device stops current supply to the electric actuator when a drive current for the electric actuator is not reduced by a predetermined value after the control of changing the compression ratio to a higher compression ratio is prohibited.16. The control device for the internal combustion engine according to claim 15 , wherein the control device stops the current supply to the electric actuator when a condition in which the drive current for the electric actuator is not less than a predetermined value continues for a first predetermined time after the control of changing the compression ratio to a higher compression ratio is prohibited.17. The control device for the internal combustion engine according to claim 16 , wherein the control device controls the compression ratio in accordance with an operating condition of the internal combustion engine claim 16 , when claim 16 , after the drive current for the electric actuator falls below the predetermined value before the first predetermined time elapses after the control of ...

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Номер записи: 78
14-04-2016 дата публикации

METHOD FOR CONTROLLING TRANSITIONS IN A VARIABLE DISPLACEMENT ENGINE

Номер: US20160102616A1
Автор: Boyer Brad Alan, Ervin James Douglas, Ku Kim Hwe, McConville Gregory Patrick
Принадлежит:

Methods and systems are provided for controlling transitions between engine operating modes in a four-cylinder engine. One method includes transitioning engine operation between two-cylinder, three-cylinder, and four-cylinder modes wherein the transitioning includes a sequence of firing events such that successive firing events are separated by at least 120 crank angle degree intervals. 1. A method comprising transitioning an engine with only four cylinders between two-cylinder , three-cylinder , and four-cylinder modes of operation , the transitioning including a sequence of at least two firing events , wherein the at least two firing events are successive and are separated by at least 120 crank angle degrees.2. The method of claim 1 , wherein the engine operates with even firing intervals in the two-cylinder and three-cylinder modes claim 1 , and wherein the engine operates with uneven firing intervals in the four-cylinder mode.3. The method of claim 2 , wherein the firing interval in the two-cylinder mode is 360 crank angle degrees claim 2 , and wherein the firing interval in the three-cylinder mode is 240 crank angle degrees.4. The method of claim 3 , wherein only a first cylinder and a second cylinder are activated and firing during the two-cylinder mode.5. The method of claim 4 , wherein the first cylinder is deactivated and only the second cylinder claim 4 , a third cylinder and a fourth cylinder are activated and firing during the three-cylinder mode.6. The method of claim 5 , wherein during the four-cylinder mode claim 5 , all cylinders are activated and the first cylinder is fired 120 crank angle degrees after a firing event in the fourth cylinder claim 5 , the third cylinder is fired 120 crank angle degrees after firing the first cylinder claim 5 , the second cylinder is fired 240 crank angle degrees after firing the third cylinder claim 5 , and the fourth cylinder is fired 240 crank angle degrees after firing the second cylinder.7. The method of claim 6 ...

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Номер записи: 79
14-04-2016 дата публикации

METHOD FOR CONTROLLING VIBRATIONS DURING TRANSITIONS IN A VARIABLE DISPLACEMENT ENGINE

Номер: US20160102620A1
Автор: Boyer Brad Alan, Ervin James Douglas, Ku Kim Hwe, McConville Gregory Patrick
Принадлежит:

Methods and systems are provided for controlling vibrations during transitions between engine operating modes in a four-cylinder engine. One method includes timing a transition in engine operation between two-cylinder, three-cylinder, and four-cylinder modes with a sequence of firing events such that successive firing events are separated by at least 120 crank angle degree intervals. Vibrations resulting from transitions may be countered by adjusting active mounts, the active mounts being adjusted in synchronization with a valvetrain switching solenoid. 1. A method , comprising:transitioning an engine with only four cylinders between two-cylinder, three-cylinder, and four-cylinder modes of operation with a sequence of firing events, the sequence including at least two successive firing events separated by at least 120 crank angle degrees; andadjusting one or more active mounts coupled to the engine in response to the transitioning.2. The method of claim 1 , further comprising adjusting the one or more active mounts to provide a different input function during each transition between modes of operation of the engine.3. The method of claim 2 , wherein the one or more active mounts are adjusted based on a triggering of a valvetrain switching solenoid during each transition.4. The method of claim 1 , wherein the engine operates with even firing intervals of 360 crank angle degrees in the two-cylinder mode claim 1 , and wherein the engine operates with even firing intervals of 240 crank angle degrees in the three-cylinder mode.5. The method of claim 4 , wherein only a first cylinder and a second cylinder are activated and firing in the two-cylinder mode claim 4 , and wherein the first cylinder is deactivated and only the second cylinder claim 4 , a third cylinder and a fourth cylinder are activated and firing in the three-cylinder mode.6. The method of claim 5 , wherein during the four-cylinder mode claim 5 , all four cylinders are activated and the first cylinder is ...

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Номер записи: 80
26-03-2020 дата публикации

INTERNAL COMBUSTION ENGINE CONTROL METHOD AND CONTROL DEVICE

Номер: US20200095927A1
Автор: Takahashi Eiji
Принадлежит: NISSAN MOTOR CO., LTD.

A control method for an internal combustion engine is arranged to vary an engine compression ratio, and includes a control mechanism arranged to control the engine compression ratio, and a driving source arranged to drive the control mechanism. The control method includes converting an operation amount of the driving source in accordance with an attenuation rate according to the engine compression ratio, transmitting the converted operation amount to the control mechanism, and controlling the cylinder pressure based on a basic ignition timing when the attenuation rate is relatively large, and controlling the cylinder pressure based on an allowable ignition timing retarded from the basic ignition timing when the attenuation rate is relatively small. 1. A control method for an internal combustion engine which is arranged to vary an engine compression ratio , and which includes a control mechanism arranged to control the engine compression ratio , and a driving source arranged to drive the control mechanism , the control method comprising:converting an operation amount of the driving source in accordance with an attenuation rate according to the engine compression ratio;transmitting the converted operation amount to the control mechanism; andcontrolling the cylinder pressure based on a basic ignition timing when the attenuation rate is relatively large, and controlling the cylinder pressure based on an allowable ignition timing retarded from the basic ignition timing when the attenuation rate is relatively small.2. The control method for the internal combustion engine as claimed in claim 1 , wherein the attenuation rate at a predetermined middle compression ratio is set to be smaller than the attenuation rates at a high compression rate higher than the middle compression rate claim 1 , and at a low compression rate lower than the middle compression rate.3. The control method for the internal combustion engine as claimed in claim 1 , wherein the allowable cylinder ...

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Номер записи: 81
13-04-2017 дата публикации

METHOD AND DEVICE FOR DIAGNOSING A VARIABLE SETTING OF A COMPRESSION RATIO IN A RECIPROCATING INTERNAL COMBUSTION ENGINE

Номер: US20170101941A1
Автор: Gladel Pascal, HASSDENTEUFEL Armin, Jessen Holger, Kesch Bernd
Принадлежит:

A method for diagnosing a variable setting of a compression ratio in a reciprocating internal combustion engine, an error of the variable setting of the compression ratio, being signaled as a function of a measured state variable of the exhaust gas system, in particular a measured exhaust gas temperature. 111-. (canceled).12. A method for diagnosing a variable setting of a compression ratio in a reciprocating internal combustion engine , the method comprising:signaling an error of the variable setting of the compression ratio as a function of a measured exhaust gas state variable of the exhaust discharge system.13. The method of claim 12 , further comprising:measuring the exhaust gas state variable in a determined or instantaneous compression ratio in a predefined operating state;modeling the exhaust gas state variable for the determined or instantaneous compression ratio in the predefined operating state; andsignaling the error of the variable setting of the compression ratio as a function of a difference between the measured exhaust gas state variable and the modeled exhaust gas state variable.14. The method of claim 13 , wherein the exhaust gas state variable corresponds to an exhaust gas temperature claim 13 , wherein the exhaust gas temperature is modeled for the determined or instantaneous compression ratio in the predefined operating state based on a predefined exhaust gas temperature model claim 13 , the exhaust gas temperature model including at least one of the following parameters as input variables:an ignition angle or an ignition point;an engine speed;an air charge;an air-fuel ratio in the cylinders of the internal combustion engine;an exhaust gas mass flow;an ambient temperature;an ambient pressure;a cooling rate of the exhaust gas between exit from the exhaust valve and the temperature sensor; andthe determined or instantaneous compression ratio.15. The method of claim 12 , further comprising:measuring the exhaust gas state variables measured at a ...

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Номер записи: 82
13-04-2017 дата публикации

METHOD AND FUNCTIONAL MONITORING APPARATUS FOR FUNCTIONAL MONITORING OF AN APPARATUS FOR VARIABLE SETTING OF A CYLINDER COMPRESSION IN A RECIPROCATING-PISTON INTERNAL COMBUSTION ENGINE

Номер: US20170102291A1
Автор: Gladel Pascal, Jessen Holger, Kesch Bernd
Принадлежит:

A method for functional monitoring of an apparatus for variable setting of a cylinder compression in a reciprocating-piston internal combustion engine is described, including ascertaining a value of an engine parameter which is indicative of an engine position of the internal combustion engine at a defined cylinder compression; comparing the ascertained value with a further value of the engine parameter; and determining, depending on a result of the comparison, whether the apparatus for variable setting of the cylinder compression is functioning correctly. 1. A method for functional monitoring of an apparatus for variable setting of a cylinder compression in a reciprocating-piston internal combustion engine , comprising:ascertaining a value of an engine parameter which is indicative of an engine position of the internal combustion engine at a defined cylinder compression;comparing the ascertained value with a further value of the engine parameter; anddetermining, depending on a result of the comparison, whether the apparatus for variable setting of the cylinder compression is functioning correctly.2. The method as recited in claim 1 , wherein the further value is a reference value that is to be expected claim 1 , in a context of correct functioning of the apparatus claim 1 , for the engine parameter in the context of the cylinder compression claim 1 , a determination being made that the apparatus is functioning correctly if a difference between the ascertained value and the reference value is less than a predetermined threshold value.3. The method as recited in claim 1 , wherein the further value is ascertained in the context of a further claim 1 , defined claim 1 , different cylinder compression claim 1 , a determination being made that the apparatus is functioning correctly if a difference between the ascertained value and the further value is greater than a predetermined threshold value.4. The method as recited in claim 1 , wherein the value is ascertained in an ...

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Номер записи: 83
04-04-2019 дата публикации

FILTER ELEMENT FOR A CONNECTING ROD AND CONNECTING ROD FOR AN INTERNAL COMBUSTION ENGINE WITH VARIABLE COMPRESSION

Номер: US20190101054A1
Автор: Mudra Alexander, Schulze Dietmar
Принадлежит:

A filter element for a connecting rod including an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, the filter element comprising a bushing that is flowable by a hydraulic fluid along a fluid path; and at least one screen insert that is arranged in the fluid path of the bushing. The invention also relates to a connecting rod with at least one filter element. 1. A filter element for a connecting rod including an eccentrical element adjustment arrangement for adjusting an effective connecting rod length , the filter element comprising:a bushing that is flowable by a hydraulic fluid along a fluid path; andat least one screen insert that is arranged in the fluid path of the bushing.2. The filter element according to claim 1 , wherein the at least one screen insert is arranged at a face of the bushing.3. The filter element according to claim 1 , wherein the bushing includes a throttling location along the fluid path.4. The filter element according to claim 3 , wherein the throttling location is integrated into the bushing.5. A connecting rod for a variable compression internal combustion engine claim 3 , the connecting rod comprising:an eccentrical element adjustment arrangement for adjusting an effective connecting rod length, the eccentrical element adjustment arrangement including at least a first cylinder and a second cylinder, a first inlet for feeding hydraulic fluid into the first cylinders and a first outlet for draining the hydraulic fluid from the first cylinder and a second inlet for feeding hydraulic fluid into the second cylinder and a second outlet for draining the hydraulic fluid from the second cylinder;a hydraulic arrangement including at least one switch valve for controlling a hydraulic fluid flow of the connecting rod wherein the at least one switch valve includes a movable piston which is displaceable into a first switching or a second switching position, wherein the outlet of the first cylinder is ...

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Номер записи: 84
02-06-2022 дата публикации

ADAPTIVE ANY-FUEL CAMLESS RECIPROCATING ENGINE

Номер: US20220170423A1
Автор: Sinsheimer Peter, Spearrin Raymond Mitchell, Tsao Tsu-Chin
Принадлежит: The Regents of the University of California

An adaptive, any-fuel reciprocating engine using sensor feedback integration of high-speed optical sensors with real-time control loops to adaptively manage the electronic actuation schemes over a range of engine loads and fuels. The engine uses one or more optical sensors to collect specific types of gas property data via a spectroscopic technique to adaptively control various components within the engine. 1. An adaptive camless reciprocating engine , the engine comprising:a cylinder housing a reciprocating piston;a valve coupled to the cylinder;at least one electronically-controllable actuator coupled to the valve, the actuator configured to control operation of the valve;a plurality of optical sensors disposed at or near the cylinder and configured to acquire optical data within the cylinder or at a location upstream or downstream from the cylinder; anda controller coupled to the one or more optical sensors and electronically-controllable actuator in a closed control loop;wherein the controller is configured to receive data from the one or more optical sensors and process said data to actively manage actuation of the electronically-controllable actuator according to one or more parameters calculated from the acquired optical data.2. The engine of claim 1 , further comprising:a plurality of electronically-controllable actuators coupled to the controller and one or more corresponding engine components;wherein the engine components are selected from the group consisting of: an intake valve, exhaust valve, spark plug, fuel injector, and variable compression mechanism; andwherein the controller is configured to manage one or more parameters selected from the group consisting of cylinder intake/exhaust valve timing, compression ratio, spark ignition, and fuel injection.3. The engine of claim 1 , wherein the one or more optical sensors are disposed at locations for measurement of a fluid property within a cavity comprising one or more of the cylinder claim 1 , an intake ...

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Номер записи: 85
19-04-2018 дата публикации

COMPRESSION RATIO ADJUSTMENT APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20180106199A1
Автор: Nakamura Makoto, Shoji Masahiro
Принадлежит: Hitachi Automotive Systems, Ltd.

An object of the present invention is to provide a variable mechanism apparatus for an internal combustion engine capable of preventing a crown surface of a piston and intake and exhaust valves from interfering with each other or sufficiently acquiring an internal EGR effect during an exhaust stroke when a piston position at a compression top dead center is raised to achieve a high mechanical compression ratio. The variable mechanism apparatus is configured to set a piston position at an intake (exhaust) top dead center to a lower position than the piston position at the compression top dead center by a variable compression ratio mechanism. According thereto, the variable mechanism apparatus can prevent the crown surface of the piston and the intake and exhaust valves from interfering with each other or sufficiently acquiring the internal EGR effect during the exhaust stroke by setting the piston position at the exhaust top dead center to the low position when the piston position at the compression top dead center is raised to achieve the high mechanical compression ratio. 1. A compression ratio adjustment apparatus for an internal combustion engine , comprising:a variable compression ratio mechanism capable of changing a mechanical compression ratio and a mechanical expansion ratio by changing a stroke position of a piston in a four-cycle internal combustion engine,wherein the variable compression ratio mechanism sets a piston position at an exhaust top dead center to a lower position than a piston position at a compression top dead center of the piston.2. The compression ratio adjustment apparatus for the internal combustion engine according to claim 1 , wherein the variable compression ratio mechanism sets the piston position at the exhaust top dead center to the lower position than the piston position at the compression top dead center of the piston throughout an entire variable range of the variable compression ratio mechanism.3. The compression ratio ...

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Номер записи: 86
30-04-2015 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20150114338A1
Автор: FEINSTEIN Jonathan Jay
Принадлежит:

An internal combustion engine in which the power output is controlled by modulating at least one of the compression ratio, expansion ratio, ratio of expansion rate to compression rate, air to fuel ratio, and steam to air ratio. Continuous isobaric catalytic combustion followed by isothermal expansion and the use of separate compressor and expander devices are used. Control dynamically maximizes fuel efficiency for the given power demand conditions. Power output is controlled by modulating flame temperature and/or pressure instead of by throttling. Lean combustion, high compression ratio, exhaust heat recuperation, and high power density and fuel economy are provided. External cooling is minimized or eliminated. Insulation of the engine effectively reduces energy losses to friction. Interchangeable use of gasoline, hydrogen and ammonia at high fuel efficiency is made possible for transitional periods of fuel availabilities. An injector suitable for isothermal expansion is provided. 1. An internal combustion engine having a peak temperature comprising:a. a compressor for compressing inlet air,b. a heat exchanger for heating the compressed air exiting the compressor against expanded air exiting a positive displacement expander,c. a combustion chamber for heating the compressed air,d. a first injector which injects fuel into the combustion chamber to combust air and fuel,e. a positive displacement expander for expanding the compressed and heated air, said expander being separate from the compressor, andf. a controller which modulates the peak temperature to be less than a prescribed temperature by dynamically adjusting at least one of a compression ratio, an expansion ratio, an E/C ratio, and an A/F ratio.2. The internal combustion engine of further comprising a second injector which combusts the air and fuel in the expander.3. The internal combustion engine of further comprising a third injector which injects and evaporates water in the air in the engine.4. The ...

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Номер записи: 87
30-04-2015 дата публикации

METHOD AND APPARATUS FOR CONTROLLING COMBUSTION OF ENGINE HAVING MIXED COMBUSTION MODE

Номер: US20150114354A1
Автор: CHI Yo Han, CHOI Dae, JUNG Hyun Sung, LEE Hyeung Woo, PARK Seung II
Принадлежит: HYUNDAI MOTOR COMPANY

A method of controlling combustion of an engine improves unstable ignition and knocking which may be generated in an engine to which a diesel-gasoline mixed combustion mode and a gasoline mixed combustion mode are applied to low load and high load driving zones. The method includes: determining a combustion mode according to a current driving state of the engine; determining a compression ration corresponding to the combustion mode; controlling a variable compression ratio device to control a compression ratio of a cylinder; determining whether the combustion state of the engine obtained during the combustion after the control to the compression ratio satisfies a set condition; and performing a compression ratio compensation such that the combustion state of the engine satisfies the set condition with taking a combustion pressure sensor signal as a feedback signal when the set condition is not satisfied. 1. A method of controlling combustion of an engine having a mixture combustion mode where a mixture combustion of diesel and gasoline is carried out and a gasoline combustion mode where only gasoline is burnt , the method comprising:determining a combustion mode according to a current driving state of the engine from the mixture combustion mode and the gasoline combustion mode;determining a compression ration corresponding to a combustion mode according to the current driving state of the engine;controlling a variable compression ratio device to control a compression ratio of a cylinder to the determined compression ratio;determining whether the combustion state of the engine obtained during the combustion after the control to the compression ratio satisfies a set condition for securing a combustion stability; andperforming a compression ratio compensation performed by the variable compression ratio device such that the combustion state of the engine satisfies the set condition with taking a combustion pressure sensor signal as a feedback signal when the set ...

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Номер записи: 88
30-04-2015 дата публикации

VARIABLE COMPRESSION RATIO APPARATUS

Номер: US20150114356A1
Автор: Choi Myungsik, KIM Won Gyu
Принадлежит: HYUNDAI MOTOR COMPANY

A variable compression ratio apparatus may include an operating unit operated by hydraulic pressure to reciprocate the plunger, an oil control valve controlling hydraulic pressure supplied to the operating unit, an oil supplying unit storing oil supplied to the operating unit via the oil control valve and transmitting the stored oil to the oil control valve, an actuator operating the oil control valve, and a controller connected with the actuator to control the actuator according to an operational state of an engine. 1. A variable compression ratio apparatus changing a volume of a combustion chamber by an operation of a plunger configured to reciprocate in a space communicating with an interior of the combustion chamber according to an operational state of an engine , the apparatus includingan operating unit operated by hydraulic pressure to reciprocate the plunger,an oil control valve controlling the hydraulic pressure supplied to the operating unit,an oil supplying unit storing oil supplied to the operating unit via the oil control valve, and transmitting the stored oil to the oil control valve,an actuator operating the oil control valve, anda controller connected with the actuator to control the actuator according to the operational state of the engine.2. The apparatus of claim 1 , wherein the operating unit includesa hydraulic pressure cylinder formed in a hollow cylindrical shape of which one surface and another surface thereof are closed,a piston reciprocating along a length direction of the hydraulic pressure cylinder in a hollow of the hydraulic pressure cylinder, andan operating rod passing through at least one of the one surface and the another surface of the hydraulic pressure cylinder and connected to the piston and the plunger,wherein the operating rod integrally moves together with the piston and the plunger, andwherein the hollow of the hydraulic pressure cylinder is partitioned into a first chamber and a second chamber by the piston.3. The apparatus ...

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Номер записи: 89
29-04-2021 дата публикации

DUAL-CRANKSHAFT, OPPOSED-PISTON ENGINE WITH MECHANICALLY UNCOUPLED CRANKSHAFTS

Номер: US20210123389A1
Автор: SALVI ASHWIN A.
Принадлежит: Achates Power, Inc.

An opposed-piston engine with two crankshafts includes a first power transducer coupled to a first crankshaft of the two crankshafts and a second power transducer coupled to a second crankshaft of the two crankshafts. The two crankshafts are not rotatably connected, and so are free to rotate independently of each other. Phase relationships between the crankshafts may be controlled by operating the power transducers to increase, or reduce, crankshaft torque. Changes in crankshaft phase relationships cause changes in opposed piston locations, which, in turn, enable control of engine performance factors. 1. An opposed-piston engine device , comprising:an opposed-piston engine comprising a first crankshaft and a second crankshaft, configured to rotate independently of each other;a first power transducer operatively coupled to the first crankshaft;a second power transducer operatively coupled to the second crankshaft; and,a control mechanization configured to determine a rotation phase difference between the first and second crankshafts and to cause the first and second power transducers to change the rotation phase difference between the first and second crankshafts.2. The opposed-piston engine device of in which the control mechanization comprises:a first rotation sensor engaging the first crankshaft;a second rotation sensor engaging the second crankshaft; and, connected to receive signals from the first and second rotational sensors and configured to determine the rotation phase difference based on the signals received from the first and second rotational sensors; and,', 'connected to transmit signals to the first and second power transducer devices which cause the first and second power transducers to change the rotation phase difference., 'a control unit which is3. The opposed-piston engine device of in which the first and second power transducers each comprises an electric motor/generator device.4. The opposed-piston engine device of in which the change of the ...

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Номер записи: 90
27-04-2017 дата публикации

METHOD AND SYSTEM FOR ENGINE CONTROL

Номер: US20170114739A1
Автор: Glugla Chris Paul
Принадлежит:

Methods and systems are provided for coordinating cylinder deactivation adjustments with changes to individual cylinder piston displacement. In doing do, the benefits of variable displacement and variable compression ratio may be synergized. An engine can be operated with some cylinders deactivated while active cylinders operate with knock addressed while spark timing is at MBT for a longer duration. 1. A method for an engine , comprising:selectively deactivating one or more engine cylinders based on engine load; andadjusting a piston displacement to vary a compression ratio of active engine cylinders to maintain spark timing of the engine at a peak torque timing while maintaining the one or more cylinders deactivated.2. The method of claim 1 , wherein the adjusting includes claim 1 , while maintaining spark timing at the peak torque timing claim 1 , adjusting the piston displacement to reduce the compression ratio from a higher threshold compression ratio as an indication of knock increases.3. The method of claim 2 , further comprising claim 2 , reducing the compression ratio while maintaining the spark timing at the peak torque timing responsive to knock until a lower threshold compression ratio is reached claim 2 , and responsive to a further indication of knock claim 2 , retarding spark timing while maintaining the compression ratio at the lower threshold.4. The method of claim 3 , further comprising claim 3 , retarding spark timing responsive to the further indication of knock until a fuel usage amount is higher than a threshold amount claim 3 , and then reactivating a deactivated cylinder claim 3 , resuming spark timing at the peak torque timing in the active cylinders claim 3 , and raising the compression ratio of the active cylinders to or towards the higher threshold compression ratio.5. The method of claim 3 , wherein the adjusting includes claim 3 , retarding spark timing responsive to the further indication of knock until spark timing reaches a threshold ...

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Номер записи: 91
07-05-2015 дата публикации

SYSTEM AND METHOD OF CONTROLLING FUEL INJECTION PRESSURE IN AN ENGINE HAVING AN IN-CYLINDER PRESSURE SENSOR

Номер: US20150122223A1
Автор: Zukouski Russell P.
Принадлежит: International Engine Intellecutal Property Company, LLC

A method of operating an internal combustion engine is provided. An in-cylinder pressure within a cylinder of the engine is determined. A fuel injection pressure from a fuel injector disposed within the cylinder is determined. A ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure is compared to a stored threshold value. The fuel injection pressure is adjusted based upon the comparison of the ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to the stored threshold value. 1. A method of operating an internal combustion engine comprising:determining an in-cylinder pressure within a cylinder of the engine;determining a fuel injection pressure from a fuel injector disposed within the cylinder;comparing a ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to a stored threshold value; andadjusting the fuel injection pressure based upon the comparison of the ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to the stored threshold value.2. A method of operating an internal combustion engine comprising:determining an air/fuel ratio of an internal combustion engine;adjusting at least one of fuel injection quantity and intake air flow to provide an air/fuel ratio between about 15 and about 18;determining an in-cylinder pressure within a cylinder of the engine;determining a fuel injection pressure from a fuel injector disposed within the cylinder;adjusting a compression ratio of the engine based upon a comparison of a ratio of the in-cylinder pressure within the cylinder and the fuel injection pressure to a predetermined stored threshold value. The present disclosure relates to a system and method of controlling combustion within an internal combustion engine having a variety of sensors for monitoring combustion occurring within a cylinder, such that adjustments may be made to operating parameters of the internal combustion engine. The ...

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Номер записи: 92
07-05-2015 дата публикации

CONTROL DEVICE FOR VARIABLE-COMPRESSION-RATIO INTERNAL COMBUSTION ENGINE

Номер: US20150122225A1
Автор: Hiyoshi Ryosuke, Kamada Shinobu
Принадлежит:

A control device for a variable compression ratio internal combustion engine is equipped with a variable compression ratio device capable of changing an engine compression ratio of the internal combustion engine. The control device detects or estimates the temperature of an exhaust component (B11), and sets a target exhaust gas temperature based on the temperature of the exhaust component (B12). A mixing ratio and compression ratio set section (B13) sets a fuel mixing ratio and the engine compression ratio within such a range as not to exceed the target exhaust gas temperature such that energy loss becomes minimum. 1. (canceled)2. A control device for a variable compression ratio internal combustion engine equipped with a variable compression ratio device capable of changing an engine compression ratio of the internal combustion engine , the control device comprising:an exhaust component temperature acquisition section that detects or estimates a temperature of an exhaust component;a target exhaust gas temperature set section that sets a target exhaust gas temperature based on the temperature of the exhaust component; anda mixing ratio and compression ratio set section that sets a fuel mixing ratio of fuel and air and the engine compression ratio within such a range as not to exceed the target exhaust gas temperature such that energy loss is reduced, based on at least the target exhaust gas temperature,wherein in a case where an operating region is an operating region in which the temperature of the exhaust component is to be restricted to a predetermined limit value or less, and the temperature of the exhaust component is lower than the limit value, the target exhaust gas temperature set section sets the target exhaust gas temperature higher as the temperature of the exhaust component becomes lower.3. A control device for a variable compression ratio internal combustion engine equipped with a variable compression ratio device capable of changing an engine ...

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Номер записи: 93
07-05-2015 дата публикации

Control device and control method for internal combustion engine

Номер: US20150122226A1
Автор: Shinobu Kamada, Taisuke IKARI
Принадлежит: Nissan Motor Co Ltd

At the time of increasing an actual intake air amount by increasing a valve overlap period of intake and exhaust valves ( 2; 3 ), an actual compression ratio is temporarily decreased to be lower than a steady-state target compression ratio. This makes it possible to increase the valve overlap period without causing interference of the intake and exhaust valves ( 2; 3 ) with a piston ( 8 ).

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Номер записи: 94
18-04-2019 дата публикации

MOVABLE FULCRUM FOR DIFFERENTIAL AND VARIABLE-STROKE CYCLE ENGINES

Номер: US20190112976A1
Автор: Yan Hailuat D., Yan Ming Jeng
Принадлежит: Yan Engines, Ltd.

An engine includes an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis, each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine. The engine further includes a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem, an actuation mechanism configured to move the piston lever and thereby the copy point, and a guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis. 1. An engine having an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis , each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine , the engine comprising:a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem;an actuation mechanism configured to move the piston lever and thereby the copy point; anda guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis,wherein the movable fulcrum comprises a roller or a slider moveable within the guide apparatus such that the movable fulcrum point is configured to move in a direction substantially perpendicular with the cylinder axis.2. The engine of claim 1 , wherein the actuation mechanism comprises a cam follower claim 1 , coupled to the piston lever claim 1 , configured to engage and travel on a mating engine cam profile to operate the piston lever.3. The engine of claim 2 , further comprising a return mechanism configured to bias the piston lever in a direction substantially opposite the ...

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Номер записи: 95
18-04-2019 дата публикации

VARIABLE COMPRESSION RATIO RECIPROCATING PISTON ENGINE

Номер: US20190112990A1
Автор: Gottorf Simon, Habermann Knut, Schaffrath Uwe
Принадлежит:

Reciprocating-piston machine (), in particular a combustion machine, with a variable compression ratio, having 1. The reciprocating-piston machine , in particular a combustion machine , with a variable compression ratio , comprisingan adjustment for adjusting the compression ratio,having a sensor device for detecting the compression ratio,and having a controller which is designed to repeatedly activate the adjustment device if a deviation of a detected compression ratio from a setpoint compression ratio exists.2. The reciprocating-piston according to claim 1 , wherein claim 1 , for the purposes of repeating the activation of the adjustment device claim 1 , the controller is designed such that the compression ratio is initially changed over into the original state and is switched back after a period of time.3. The reciprocating-piston machine according to claim 2 , wherein the adjustment device comprises a slide claim 2 , regulator or a rotary element claim 2 , for which a multiplicity of setpoint positions claim 2 , in particular exactly two setpoint positions claim 2 , are provided claim 2 , and a deviation of a setpoint position and an actual position of the slide claim 2 , regulator or rotary element is the cause of a deviation of a detected compression ratio from the setpoint compression ratio.4. The reciprocating-piston machine according to claim 1 , characterized in that the adjustment device comprises a switchover element being either claim 1 , a connecting rod or a crankshaft claim 1 , which is arranged on a movable part of the reciprocating-piston machine claim 1 , and at least one actuating element is movable relative to the switchover element in order to thus vary the position of the switchover element.5. The reciprocating-piston machine according to claim 4 , characterized in that an adjustment travel is provided during the switchover of the switchover element claim 4 , and positive guidance is provided for a first part of an adjustment travel claim 4 , ...

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Номер записи: 96
09-04-2020 дата публикации

CONTROL DEVICE FOR DIRECT FUEL INJECTION ENGINE AND CONTROL METHOD THEREOF

Номер: US20200109682A1
Автор: Kassai Masaharu, KODAMA Takayoshi
Принадлежит: NISSAN MOTOR CO., LTD.

In a first region on a low load side of an operation region of a direct fuel injection engine, homogenous combustion is performed, while, in a second region of the operation region on a load side higher than the first region, stratified combustion is performed. In the stratified combustion, a fuel is dispersed in a cylinder by a first injection operation and a fuel is unevenly distributed in a vicinity of the ignition plug by a second injection operation. Shift control by the stratified combustion is executed at a time of shifting when an operation state of the engine has shifted from the first region to the second region, and in the shift control, a fuel in an amount larger than a target amount of the second injection operation in the second region is injected by the second injection operation and then, an injection amount of the second injection operation is decreased toward the target amount. 111.-. (canceled)12. A control method of a direct fuel-injection spark ignition engine including an ignition plug and a fuel injection valve arranged to be capable of injecting a fuel directly in a cylinder , whereinin a first region on a low load side of an operation region of the engine, homogenous combustion is performed, while, in a second region of the operation region on a load side higher than the first region, stratified combustion is performed, in stratified combustion the a fuel is dispersed in a cylinder by a first injection operation of the fuel injection valve and a fuel is unevenly distributed in a vicinity of the ignition plug by a second injection operation of the fuel injection valve;shift control by the stratified combustion is executed at a time of shifting the operation region when an operation state of the engine has shifted from the first region to the second region; andin the shift control, a fuel in an amount larger than a target amount of the second injection operation in the second region is injected in the second injection operation by controlling ...

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Номер записи: 97
14-05-2015 дата публикации

Internal combustion engine provided with variable compression ratio mechanism

Номер: US20150128911A1
Автор: Hiroyuki Tanaka, Takano NAKAI, Takashi Kawasaki, Yoshihiro Sakayanagi
Принадлежит: Toyota Motor Corp

This internal combustion engine is provided with a variable compression ratio mechanism capable of changing a mechanical compression ratio by changing the volume of the combustion chamber at the top dead center. The pressure and temperature of remaining combusted gas within the combustion chamber at the time when the exhaust valve is closed in the intake stroke is measured or estimated, the pressure and temperature of intake air supplied into the combustion chamber after the exhaust valve is closed in the intake stroke is measured or estimated, and based on the assumption that the pressure and temperature of the remaining combusted gas which saturates the volume of the combustion chamber at the time when the exhaust valve is closed in the air intake stroke become, when the intake air is supplied to the combustion chamber, equal to the pressure and temperature of the intake air, the volume of the remaining combusted gas after the change is calculated.

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Номер записи: 98
25-04-2019 дата публикации

SYSTEM AND METHOD FOR VARIABLE COMPRESSION RATIO ENGINE

Номер: US20190120147A1
Автор: Alobiedat Lyth, Leone Thomas G., Shelby Michael Howard
Принадлежит:

Methods and systems are provided for improving calibration of a variable compression ratio engine. Cylinder-to-cylinder compression ratio variations are detected and accounted for by comparing cylinder fuel flow and IMEP at each compression ratio setting. Dilution parameters including EGR and VCT schedule are also calibrated to account for the cylinder-to-cylinder compression ratio variations. 1. A method for an engine , comprising:actuating a variable compression ratio mechanism of an engine to mechanically adjust a target compression ratio of the engine in accordance with an updated calibration, the updated calibration based on each of fuel flow and peak torque of each cylinder at each compression ratio setting of the mechanism.2. The method of claim 1 , wherein the updated calibration includes:estimating the fuel flow and the peak torque of each cylinder at a plurality of compression ratio settings;quantifying a total engine fuel flow of the engine at each of the plurality of compression ratio settings as a sum of the fuel flow of each cylinder at a corresponding compression ratio setting; andlearning a total torque of the engine at each of the plurality of compression ratio settings as a sum of the torque of each cylinder at the corresponding compression ratio setting.3. The method of claim 1 , wherein the actuating includes:when driver torque demand is lower than a threshold, actuating the mechanism to one of a plurality of compression ratio settings having a lowest total engine fuel flow; andwhen driver torque demand is higher than the threshold, actuating the mechanism to another of the plurality of compression ratio settings having a highest total engine torque.4. The method of claim 3 , wherein the threshold is based on one or more of accelerator pedal position claim 3 , engine speed claim 3 , fuel octane claim 3 , ambient temperature claim 3 , and ambient humidity.5. The method of claim 1 , further comprising claim 1 , adjusting an engine dilution ...

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Номер записи: 99
25-04-2019 дата публикации

SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE

Номер: US20190120148A1
Автор: KAKO Junichi, Okazaki Shuntaro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A control system of an internal combustion engine includes an S/V ratio changing mechanism able to change an S/V ratio of a combustion chamber and a detection device having an output value changing in accordance with a hydrogen concentration in exhaust gas, which increases along with an increase in the S/V ratio, the internal combustion engine being controlled by the output value of the detection device. Further, the output value of the detection device or a parameter relating to operation of the internal combustion engine is corrected in accordance with the S/V ratio of the above S/V ratio changing mechanism. 1. A control system of an internal combustion engine comprising:an S/V ratio changing mechanism that changes an S/V ratio of a combustion chamber;a three-way catalyst which is arranged in an engine exhaust passage;an oxygen sensor or an air-fuel ratio sensor that is arranged upstream of the three-way catalyst in the engine exhaust passage and that is to output an output value changing in accordance with a hydrogen concentration in exhaust gas, which increases along with an increase in the S/V ratio; anda controller configured to control an air-fuel ratio of gas corresponding to the output value of the oxygen sensor or the air-fuel ratio sensor to be leaner so that the air-fuel ratio of gas which flows into the three-way catalyst is closer to a stoichiometric air-fuel ratio when the air-fuel ratio of gas corresponding to the output value of the oxygen sensor or the air-fuel ratio sensor is low than when the air-fuel ratio of gas is high, and so that a lean changing degree of the air-fuel ratio of gas corresponding to the output value of the oxygen sensor or the air-fuel ratio sensor is larger when the S/V ratio is high than when the S/V ratio is low.2. The control system of the internal combustion engine as set forth in claim 1 , wherein the oxygen sensor or the air-fuel ratio sensor includes an upstream side sensor which is arranged at an upstream side of the ...

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Номер записи: 100