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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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Форма поиска

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 4037. Отображено 100.
09-02-2012 дата публикации

Cam follower

Номер: US20120031223A1
Автор: Norbert Geyer, Stefan Dorn
Принадлежит: Schaeffler Technologies AG and Co KG

A cam follower for a high-pressure fuel pump of an internal combustion engine, which has a cam roller that is accommodated in a pocket of the cam follower. The cam roller has a bore and the bore is mounted by on a pin which is seated at the ends in receptacles of opposite walls of the pocket. The cam roller runs with its end sides directly in front of the walls. Each end side of the cam roller takes the form of an outer surface of a spherical zone, and each wall is smooth and straight, at least in the region of its run-on piece at the respective end side of the cam roller.

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Номер записи: 1
29-03-2012 дата публикации

Electrically activated carburettor

Номер: US20120074600A1
Автор: Christian Kellermann
Принадлежит: Makita Corp

In order to create an electrically activated carburettor for petrol engines with an air funnel for sucking in fuel from a fuel line leading into the air funnel which is connected to a fuel chamber and between fuel chamber and orifice in the air funnel a fuel jet for adjusting a fuel quantity that can be sucked in from the fuel chamber because of vacuum in the air funnel that can be flexibly adapted as carburettor more preferably for power implements, which overcomes the abovementioned disadvantages of the prior art and has a simple, sturdy construction which allows constant long-term behaviour, it is proposed that in series connection with the fuel jet at least two Tesla diodes are provided, between which a pumping chamber with a pumping unit is located.

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Номер записи: 2
02-08-2012 дата публикации

High pressure pump

Номер: US20120195779A1
Автор: Osamu Hishinuma, Teppei MATSUMOTO, Yuichi Irino
Принадлежит: Denso Corp, Nippon Soken Inc

A plunger stopper is installed to a cylinder hole forming portion of a cylinder forming member. The plunger stopper cooperates with a step portion of a plunger to limit movement of the plunger in a state where a slide surface of the plunger contacts an inner peripheral wall surface of the cylinder hole.

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Номер записи: 3
22-11-2012 дата публикации

Internal combustion engine fuel supply system

Номер: US20120291747A1
Автор: Günther Zauner, Jean-Charles Pouillard, Ralph Jurjevec, Roland Ennsmann
Принадлежит: BRP Powertrain GmbH and Co KG

An internal combustion engine has a fuel supply system which has a fuel pump driving mechanism that limits the relative motion between a part of the mechanism contacting a plunger of the pump and the plunger.

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Номер записи: 4
11-07-2013 дата публикации

Fuel supply system for internal combustion engine

Номер: US20130174809A1
Автор: Hidekazu Hironobu, Masaaki Nagashima, Yosuke Kosaka
Принадлежит: Honda Motor Co Ltd

A fuel supply system for an internal combustion engine capable of executing calculation of an energization time of the electromagnetic valve at proper timing and thereby properly controlling the amount of fuel to be discharged from the fuel pump toward a fuel injection valve. In the fuel supply system, when a predetermined timing corresponding to a predetermined crank angle position of the engine deviates from a predetermined cam angle timing which is within a predetermined time period including a timing at which a top of a cam nose of the driving cam is abutting a plunger, and preceding and following the timing, and corresponds to a predetermined rotational angle position of the driving cam, the calculation timing of the energization time is corrected such that the calculation timing is made closer to the cam angle timing.

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Номер записи: 5
30-01-2014 дата публикации

ENGINE

Номер: US20140026863A1
Автор: Ito Ryosuke, SUMI Takuya
Принадлежит: MAKITA CORPORATION

An engine includes: a piston; a carburetor having a diaphragm fuel pump, the diaphragm fuel pump including a pump chamber configured to suck and discharge fuel and a diaphragm chamber to which a pressure to drive the pump chamber is applied; and a communicating passage configured to connect between the diaphragm chamber and a negative pressure part in which a negative pressure is created due to movement of the piston. A flowback prevention part is formed in the communicating passage to allow fluid to move only in on direction from the diaphragm chamber to the negative pressure part. 1. An engine comprising:a piston;a carburetor having a diaphragm fuel pump; a pump chamber configured to suck and discharge fuel; and', 'a diaphragm chamber to which a pressure to drive the pump chamber is applied; and, 'the diaphragm fuel pump includinga communicating passage configured to connect between the diaphragm chamber and a negative pressure part in which a negative pressure is created due to movement of the piston,wherein a flowback prevention part is formed in the communicating passage to allow fluid to move only in on direction from the diaphragm chamber to the negative pressure part.2. The engine according to claim 1 , wherein the negative pressure part is a crank chamber in which the piston slidably moves.3. The engine according to claim 2 , wherein the flowback prevention part is formed in a crank chamber side opening in a cylinder part.4. The engine according to claim 3 , wherein:the communicating passage is formed in a side member that contacts the cylinder part; andthe side member is configured to position and fix the flowback prevention part in the cylinder part.5. The engine according to claim 1 , wherein the communicating passage is connected to an atmospheric pressure opening passage configured to communicate with a space under atmospheric pressure.6. The engine according to claim 1 , wherein the diaphragm chamber is connected to an atmospheric pressure opening ...

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Номер записи: 6
30-01-2014 дата публикации

FUEL PUMP

Номер: US20140030119A1
Автор: Honda Yoshihiko
Принадлежит:

A fuel pump includes a housing, a pump section disposed within the housing on a first side thereof, a motor section disposed within the housing on a second side thereof and communicating with the pump section, and an upper body closing an end of the housing on the second side. A fuel chamber, into which fuel flows from the pump section through the motor section toward the second side of the housing, and a first branch fuel path, which is connected to the fuel chamber, are provided between the upper body and a motor. A discharge port is connected to the fuel chamber. A supply port is connected to the first branch fuel path, and the fuel in the fuel chamber is provided to the supply port through the first branch fuel path. 1. A fuel pump comprising:a housing including an inlet port disposed on a first side of the housing;a pump section disposed within the housing on the first side, the pump section communicating with the inlet port;a motor section disposed within the housing on a second side and communicating with the pump section, the motor section including a motor configured to drive the pump section; andan upper body closing an end of the housing on the second side, the upper body including a discharge port communicating with the motor section and an outlet port communicating with the motor section, whereina fuel chamber, into which fuel flows from the pump section, and a first branch fuel path, which is connected to the fuel chamber, are provided between the upper body and the motor,the discharge port is connected to the fuel chamber, the fuel in the fuel chamber being directly provided to the discharge port without being provided through the first branch fuel path, andthe outlet port is connected to the first branch fuel path, the fuel in the fuel chamber being provided to the outlet port by being provided through the first branch fuel path.2. The fuel pump as in claim 1 , wherein the first branch fuel path extends in a first direction from the fuel chamber ...

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Номер записи: 7
06-02-2014 дата публикации

Drain for Fuel Pump

Номер: US20140034018A1
Автор: Christopher Robert Jones, Eric Lee Rogers, Stephen Robert Lewis, Venkata R. Tatikonda
Принадлежит: Caterpillar Inc

A fuel pump and method for draining such and for providing a lubrication fluid sump level for startup of the fuel pump are disclosed. The fuel pump may comprise a housing, a first plunger apparatus, and a camshaft rotatably mounted in the housing. The camshaft has a first end and a second end and may define a bore extending from the first end to the second end. The camshaft may include a first interface operatively connected to the first plunger apparatus.

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Номер записи: 8
20-02-2014 дата публикации

Pump Unit for a High-Pressure Pump

Номер: US20140050597A1
Автор: Anatoliy Lyubar, Dancia Stegemann, Michael Absmeier, Xaver Gebhardt
Принадлежит: Continental Automotive GmbH

A pump unit includes a pump housing having a low-pressure inlet and a high-pressure outlet. A working medium is fed via the low-pressure inlet to a working chamber formed in the pump housing. The working medium is discharged from the working chamber via the high-pressure outlet. The pump unit also includes a pump piston channel formed in the pump housing and having a longitudinal axis. The pump unit has a first pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically to the working chamber. The pump unit also has a second pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically via a compensation volume to the first pump piston, wherein the compensation volume is coupled hydraulically to a compensation unit configured to adapt the compensation volume based on a pressure in the working chamber.

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Номер записи: 9
04-01-2018 дата публикации

HIGH-PRESSURE PUMP AND PRODUCTION METHOD THEREOF

Номер: US20180003138A1
Автор: NAKAOKA Masaharu
Принадлежит:

A pump body of a high-pressure pump includes a pressure chamber formed in a deep portion of a cylinder. A plunger reciprocates within the cylinder to vary a volume of the pressure chamber. A discharge path and a supply path are formed in the pump body and extend in a radial direction of the cylinder from the pressure chamber. A pin provided at an end of the plunger in the pressure chamber protrudes in one radial direction of the plunger to the outside of an inner circumference of the cylinder. In this case, the pin is engaged with a step portion between the cylinder and the pressure chamber in a state before attachment of the high-pressure pump to an internal combustion engine. Accordingly, separation of the plunger from the cylinder is avoidable. 1. A high-pressure pump comprising:a cylinder;a pump body including a pressure chamber having a larger inside diameter than an inside diameter of the cylinder, the pressure chamber provided in a deep portion of the cylinder;a plunger that reciprocates within the cylinder to vary a volume of the pressure chamber;a fuel path formed in the pump body so as to extend in a radial direction of the cylinder from the pressure chamber; anda protrusion portion protruding in one radial direction from an end of the plunger in the pressure chamber to the outside of an inner circumference of the cylinder.2. The high-pressure pump according to claim 1 , wherein:the cylinder and the pump body are formed integrally; andthe pump body closes the pressure chamber on a side opposite to the plunger.3. The high-pressure pump according to claim 1 , wherein:the protrusion portion is a column-shaped member fixed to a hole or a screw hole formed at the end of the plunger on a side protruding to the pressure chamber.4. The high-pressure pump according to claim 3 , wherein:the column-shaped member is a pin press-fitted and fixed to the hole formed at the end of the plunger on the side protruding to the pressure chamber.5. The high-pressure pump ...

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Номер записи: 10
03-01-2019 дата публикации

Mecha-Hydraulic Actuated Inlet Control Valve

Номер: US20190003435A1
Автор: Huebner Lars, Vukadinovic Vlade
Принадлежит: WOODWARD, INC.

The subject matter of this specification can be embodied in, among other things, a fluid control device that includes a housing defining a plunger cavity in fluid communication with a fluid inlet and a fluid outlet, a valve having a shaft having a first end and a second end, and a stopper at the first end configured to block a fluid circuit between the fluid inlet and the fluid outlet in a first configuration of the inlet control valve and connect the fluid circuit in a second configuration of the inlet control valve, and a plunger configured for axial movement within the plunger cavity, defining a shaft cavity having an inner wall extending from an enclosed end to an open end in fluid communication with the fluid outlet, and configured to accommodate axial movement of the shaft within the shaft cavity. 1. A fluid control device comprising:a housing defining a plunger cavity in fluid communication with a fluid inlet and a fluid outlet; a shaft having a first end and a second end; and', 'a stopper at the first end, configured to block a fluid circuit between the fluid inlet and the fluid outlet in a first configuration of the inlet control valve and connect the fluid circuit in a second configuration of the inlet control valve; and, 'a valve comprisinga plunger configured for axial movement within the plunger cavity, defining a shaft cavity having an inner wall extending from an enclosed end to an open end in fluid communication with the fluid outlet, and configured to accommodate axial movement of the shaft within the shaft cavity.2. The fluid control device of claim 1 , wherein the shaft and the inner wall define a fluid passage from the open end to the enclosed end.3. The fluid control device of claim 2 , wherein the shaft cavity and the shaft are configured such that the fluid passage has a predetermined cross-section.4. The fluid control device of claim 1 , further comprising a biasing member configured to urge the valve toward the first configuration.5. The ...

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Номер записи: 11
13-01-2022 дата публикации

Roller tappet for a fuel pump

Номер: US20220010691A1
Автор: Norbert Geyer
Принадлежит: Schaeffler Technologies AG and Co KG

A roller tappet for a fuel pump is provided that has a guide housing which includes a drive-side and output-side section of the same external diameter, and a separate support body extending longitudinally through the guide housing. An upper face on the drive-side section carries a pin with a roller thereon. A lower face of the output-side section interacts at least indirectly with an arrangement for a pump piston. The guide housing includes a drive-side section and an output side section that are separate, axially spaced rings connected to one another via the support body. The support body has a first ring area with the upper face and a second ring area with the lower face. The first ring area is connected to an inner jacket of the drive-side section and the second ring area is connected to an inner jacket of the output-side section.

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Номер записи: 12
13-01-2022 дата публикации

INTEGRATED TAPPET ASSEMBLY

Номер: US20220010870A1
Автор: Benham Eric A., Duncan Richard E., Edwards Romaine O., Jeffries Neil, Phillips Ross A., Sethuraman Karthik, Trocki Marian, VALENTIN Steven
Принадлежит:

A tappet assembly () used in mechanical equipment includes a tappet body () having a cylindrical shape and including a lower carrier portion () and an upper shell portion () having a cavity () defined by an inner wall () of the upper shell portion () and a top surface () of the lower carrier portion (). The lower carrier portion () and the upper shell portion () are integrally formed as a single-piece unit. A post () extends upwardly from the top surface () of the lower carrier portion () and is configured to reduce a peak contact pressure associated with the tappet body (). 1100. A tappet assembly () used in mechanical equipment , comprising:{'b': 108', '152', '158', '150', '160', '158', '154', '152', '152', '158, 'a tappet body () having a cylindrical shape and including a lower carrier portion () and an upper shell portion () having a cavity () defined by an inner wall () of the upper shell portion () and a top surface () of the lower carrier portion (), the lower carrier portion () and the upper shell portion () being integrally formed as a single-piece unit; and'}{'b': 162', '154', '152', '108, 'a post () extending upwardly from the top surface () of the lower carrier portion () and being configured to reduce a peak contact pressure associated with the tappet body ().'}2152. The tappet assembly of claim 1 , wherein the lower carrier portion () has a substantially solid body.3162154152. The tappet assembly of claim 1 , wherein the post () is positioned substantially at a center of the top surface () of the lower carrier portion ().4162. The tappet assembly of claim 1 , wherein the post () is a cylindrical column.5164166108. The tappet assembly of claim 1 , wherein a lubricant feed groove () is disposed on an outer wall () of the tappet body () and is configured to receive a lubricant.6. The tappet assembly of claim 5 , wherein the lubricant is an oil or a fuel.7164158152. The tappet assembly of claim 5 , wherein the lubricant feed groove () continuously extends ...

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Номер записи: 13
20-01-2022 дата публикации

VALVE ACTUATION SYSTEM FOR ENGINE AND VALVE LIFTER AND ROCKER ARM FOR SAME

Номер: US20220018266A1
Автор: Ganesan Selvaganpathi, JR. John Stephen, Pipis
Принадлежит: CATERPILLAR INC.

A valve actuation system for an engine includes a rotatable camshaft, an injector actuation linkage, and a valve actuation linkage. The valve actuation linkage includes a valve lifter, a valve pushrod, and a rocker arm. At least one of a rocker arm center plane defined by the valve rocker arm or a lifter roller center plane defined by the valve lifter is spaced an offset distance from a pushrod axis, providing an increased contact width between an injector roller in the injector actuation linkage and one of a plurality of cam lobes of the camshaft. The valve lifter includes a fork defining a center plane spaced an offset distance from a center axis of the valve lifter. A rocker arm includes a screw bore offset relative to a rocker arm center plane. 1. A valve actuation system for an engine comprising:a camshaft including a plurality of cam lobes and being rotatable about a camshaft axis;an injector actuation linkage including an injector lifter having an injector roller in contact with a first one of the plurality of cam lobes;a valve actuation linkage including a valve lifter defining a reciprocation axis, a pushrod seat centered on the reciprocation axis, and a lifter roller in contact with a second one of the plurality of cam lobes adjacent to the first one of the plurality of cam lobes;the valve actuation linkage further including a valve rocker arm structured to couple with an engine valve, and a valve pushrod coupled between the valve lifter and the valve rocker arm and in contact with the pushrod seat;the valve rocker arm defining a pivot axis and a rocker arm center plane extending through a center point of the pivot axis;the lifter roller defining a rotation axis and a lifter roller center plane extending through a center point of the rotation axis;the valve pushrod defining a pushrod axis extending through the valve pushrod, the valve lifter, and the valve rocker arm; andat least one of the rocker arm center plane or the lifter roller center plane is ...

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Номер записи: 14
12-01-2017 дата публикации

High Pressure Fuel Pump and Associated Drive Device

Номер: US20170009720A1
Автор: SCHMIDBAUER Thomas
Принадлежит: Continental Automotive GmbH

The present disclosure relates to internal combustion engines in general. Some embodiments may include a drive device for a high-pressure fuel pump of an internal combustion engine. It may include an eccentric ring in frictional connection with a drive shaft for converting a rotational movement of the drive shaft about a drive shaft rotational axis into a translational movement; a tappet spaced apart from the eccentric ring for passing on the translational movement from the eccentric ring; and at least two pivoting bodies disposed between the eccentric ring surface and the tappet surface and in contact with the eccentric ring surface and with the tappet surface. The eccentric ring may include at least one flat eccentric ring surface. The tappet may include at least one flat tappet surface. The pivoting bodies may each include a respective extension axis running parallel to the drive shaft rotational axis and pivot about the extension axis. 1. A drive device a high-pressure fuel pump of an internal combustion engine , the drive device comprising:an eccentric ring in frictional connection with a drive shaft for converting a rotational movement of the drive shaft about a drive shaft rotational axis into a translational movement;wherein the eccentric ring includes at least one flat eccentric ring surface;a tappet spaced apart from the eccentric ring for passing on the translational movement from the eccentric ring;wherein the tappet includes at least one flat tappet surface; andat least two pivoting bodies disposed between the eccentric ring surface and the tappet surface and in contact with the eccentric ring surface and with the tappet surface;wherein the pivoting bodies each include a respective extension axis running parallel to the drive shaft rotational axis;wherein the pivoting bodies pivot about the extension axis.2. The drive device as claimed in claim 1 , wherein the pivoting bodies each include a respective first contact surface in contact with the tappet ...

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Номер записи: 15
11-01-2018 дата публикации

HIGH-PRESSURE PUMP AND METHOD FOR MANUFACTURING SAME

Номер: US20180010562A1
Автор: NAKAOKA Masaharu, Oikawa Shinobu
Принадлежит:

A plunger of a high-pressure pump is provided reciprocatably on an inner side of a cylinder. A holder disposed on an opposite side of the cylinder from a pressurizing chamber includes a large tubular portion that provides a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion that is disposed on an opposite side of the large tubular portion from the cylinder. A pin inserted into a hole of the plunger at a position corresponding to the large tubular portion protrudes radially outward from the outer wall of the plunger and is accommodated in a space on an inner side of the large tubular portion. 1. A high-pressure pump comprising:a cylinder;a pump body that includes a pressurizing chamber provided in an end portion of the cylinder;a plunger that is disposed reciprocatably on an inner side of the cylinder and is capable of changing a volume of the pressurizing chamber;a cylindrical member that is disposed coaxially with the cylinder on an opposite side of the cylinder from the pressurizing chamber, and the cylindrical member including a large tubular portion which defines a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion having an inner diameter smaller than an inner diameter of the large tubular portion and being located on an opposite side of the large tubular portion from the cylinder; anda locking member protruding radially outward from the outer wall of the plunger at a position corresponding to the large tubular portion of the cylindrical member, the locking member being accommodated in the space on an inner side of the large tubular portion.2. The high-pressure pump according to claim 1 , whereinthe cylinder and the pump body are integrated together, andthe pump body closes an opposite side of the pressurizing chamber from the plunger.3. The high-pressure pump according to claim 1 , whereinthe locking member is capable of being ...

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Номер записи: 16
19-01-2017 дата публикации

TAPPET ASSEMBLY FOR USE IN AN INTERNAL COMBUSTION ENGINE HIGH-PRESSURE FUEL SYSTEM

Номер: US20170016418A1
Автор: Brune John E., Smith Scott P.
Принадлежит: GT TECHNOLOGIES

A tappet assembly for use in translating force between a camshaft lobe and a fuel pump assembly via reciprocal movement within a tappet cylinder having a guide slot. The tappet assembly includes a bearing assembly having a shaft and a bearing rotatably supported by the shaft for engaging the lobe. An intermediate element has a first aperture, a shelf for engaging the fuel pump assembly, and a pair of arc-shaped bearing surfaces rotatably engaging the shaft when the bearing engages the lobe and the shelf engages the fuel pump assembly. An annular body has a second aperture and at least one stop member abutting the intermediate element to align the first aperture with the second aperture. An anti-rotation clip is disposed so as to extend through the apertures and cooperates with the stop member to substantially prevent rotational and axial movement of the intermediate element with respect to the body. 1. A tappet assembly for use in translating force between a camshaft lobe and a fuel pump assembly via reciprocal movement within a tappet cylinder having a guide slot , said tappet assembly comprising:a bearing assembly having a shaft and a bearing rotatably supported by said shaft for engaging the camshaft lobe;an intermediate element having a first aperture, a shelf for engaging the fuel pump assembly, and a pair of arc-shaped bearing surfaces rotatably engaging said shaft when said bearing engages the camshaft lobe and said shelf engages the fuel pump assembly;an annular body having a second aperture and at least one stop member abutting said intermediate element so as to align said first aperture with said second aperture;an anti-rotation clip disposed so as to extend through said first aperture and said second aperture, said anti-rotation clip cooperating with said stop member so as to substantially prevent rotational and axial movement of said intermediate element with respect to said annular body.2. The tappet assembly as set forth in claim 1 , wherein said ...

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Номер записи: 17
18-01-2018 дата публикации

METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE

Номер: US20180017010A1
Автор: MOLLAR Andrea, NIEDDU Stefano
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method and apparatus are disclosed for determining the fuel quantity that is actually injected by a fuel injector in an internal combustion engine. A fuel injector is operated to perform a fuel injection. The first discharge stroke of the fuel pump is deactivated following a start of the fuel injection for preventing the discharge stroke from delivering fuel into the fuel rail. A value of a pressure drop caused into the fuel rail by the fuel injection is calculated. A value of a fuel quantity injected by the fuel injection is calculated on the basis of the calculated value of the pressure drop. 114-. (canceled)15. A method of operating an internal combustion engine having a fuel rail in fluid communication with at least one fuel injector and a fuel pump configured to perform a discharge stroke after each fuel injection performed by the fuel injector , the method comprising:performing a fuel injection with the fuel injector;deactivating the fuel pump during a first discharge stroke following a start of the fuel injection to prevent said first discharge stroke from delivering fuel into the fuel rail;calculating a pressure drop value in the fuel rail resulting from the fuel injection;calculating a quantity of fuel injected by said fuel injection based on the pressure drop value.16. The method according to further comprising:calculating a difference between the calculated quantity of fuel injected and a predetermined target value thereof; andadjusting a subsequent fuel injection using the calculated difference.17. The method according to claim 16 , wherein calculating the pressure drop value comprises:measuring a first value of a fuel rail pressure before the start of said fuel injection;measuring a second value of the fuel rail pressure after the end of said fuel injection; andcalculating the pressure drop value as a difference between the first and the second measured values of the fuel rail pressure.18. The method according to claim 17 , wherein measuring the first ...

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Номер записи: 18
17-01-2019 дата публикации

Fuel Injection System For An Internal Combustion Engine

Номер: US20190017481A1
Автор: Scheller Max
Принадлежит: Continental Automotive GmbH

The present disclosure relates to internal combustion engines. Various embodiments may include a fuel injection system for an internal combustion engine comprising: a high-pressure fuel pump with a pressure chamber and a pump piston; a high-pressure region downstream of the pump piston; and a valve arrangement connecting the pressure chamber to the high-pressure region. The valve arrangement includes an outlet valve and a pressure-limiting valve. The outlet valve and the pressure-limiting valve are mounted in two separate receptacle bores in a common valve housing. The receptacle bores extend along a longitudinal axis of the valve housing. The valve housing defines a central flow bore. The receptacle bores are each fluidly connected to the central flow bore by a bore intersection. 1. A fuel injection system for an internal combustion engine , the system comprising:a high-pressure fuel pump with a pressure chamber housing a pump piston moving to pressurize a fuel;a high-pressure region downstream of the high-pressure fuel pump into which the pump piston feeds the pressurized fuel; anda valve arrangement connecting the pressure chamber to the high-pressure region;wherein the valve arrangement includes an outlet valve with an outlet valve closing element preloaded against an outlet valve seat counter to a pressure force acting from the pressure chamber;the valve arrangement includes a pressure-limiting valve with a pressure-limiting valve closing element preloaded against a pressure-limiting valve seat counter to a pressure force acting from the high-pressure region;the outlet valve and the pressure-limiting valve are mounted in two separate receptacle bores in a common valve housing;the two separate receptacle bores extend along a longitudinal axis of the valve housing from a junction surface at a first longitudinal end of the valve housing into the valve housing;the valve housing defines a central flow bore at a second longitudinal end arranged opposite the first ...

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Номер записи: 19
21-01-2021 дата публикации

CONTROL DEVICE FOR ENGINE

Номер: US20210017929A1
Автор: Chikada Tetsuya, Ito Michio, KAWAI Yusuke, Miyamae Toru, NISHIDA Masami, NISHIMURA Kazuhiro, TAKEMOTO Kazuhiro, TOKUNAGA Tatsuhiro, YAMASHITA Shigeki
Принадлежит:

A control device for controlling an engine provided with a fuel pump including a pressurizing chamber, a plunger inserted into the pressurizing chamber and which changes a volume of the pressurizing chamber, and an on-off valve configured to open and close a suction port, is provided. When a pressurizing cycle consists of a period of pressurizing stroke in which the volume of the pressurizing chamber is reduced to allow fuel to be pressurized and a period of suction stroke in which the volume of the pressurizing chamber is increased to allow fuel to be drawn into the pressurizing chamber, a closing cycle of the on-off valve is controlled so that a ratio of the closing cycle to the pressurizing cycle becomes smaller in a second combustion mode where a partial compression-ignition combustion is performed than in a first combustion mode where SI combustion is performed. 1. A control device for controlling an engine provided with a fuel injector configured to inject fuel into a cylinder , a spark plug configured to ignite a mixture gas inside the cylinder , a fuel storage configured to store fuel to be introduced into the fuel injector , a fuel pump configured to pump fuel into the fuel storage , and a low-pressure fuel passage through which fuel to be introduced into the fuel pump flows , the control device comprising: a combustion controller to switch a combustion mode of the mixture gas between a first combustion mode and a second combustion mode by controlling each component of the engine according to an operating state of the engine; and', 'a pump controller to control the fuel pump,, 'a processor configured to executewherein in the first combustion mode, the mixture gas is combusted by SI combustion where the spark plug ignites the mixture gas, and in the second combustion mode, a portion of the mixture gas is combusted by spark ignition (SI) combustion where the spark plug ignites the mixture gas, and then the remaining mixture gas is combusted by compression ...

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Номер записи: 20
26-01-2017 дата публикации

FUEL INJECTION DEVICE

Номер: US20170022949A1
Автор: NONAKA Takumi, Watanabe Hideki
Принадлежит:

A fuel injection device for smooth discharge of a gas accumulated therein comprising a fuel pump, a solenoid valve for injecting pressurized fuel into the intake passage of an engine, a high-pressure fuel passage extending from the fuel pump to the solenoid valve and has a medially positioned constant-pressure chamber, and a fuel return passage connected to a fuel return pipe, with the fuel return passage extending from the constant-pressure chamber and having a medially positioned priming pump. The constant-pressure chamber is configured with the top wall in the upper space thereof disposed above the opening of the high-pressure fuel passage opposite the solenoid valve, the fuel return passage opens into the upper space at a position above the opening of the high-pressure fuel passage, and the gas accumulating in the constant-pressure chamber is discharged from the upper space toward the fuel tank via the fuel return passage. 1. A fuel injection device , comprising:a fuel pump that pressurizes fuel;a constant pressure chamber,a first high-pressure fuel passage extending from the fuel pump to the constant pressure chamber and a second high-pressure fuel passage extending from the constant pressure chamber towards an intake passage; anda fuel return passage that extends from the constant pressure chamber towards a fuel tank,wherein the constant pressure chamber includes an upper wall positioned above first and second openings to the first and second high-pressure fuel passages, and a third opening to the fuel return passage positioned above the first and second openings to the first and second high-pressure fuel passages.2. The fuel injection device according to claim 1 , further comprising a priming pump connected to the fuel return passage.3. The fuel injection device according to claim 1 , further comprising a fuel return pipe connected to the fuel return passage.4. The fuel injection device according to claim 2 , further comprising first and second check valves ...

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Номер записи: 21
24-01-2019 дата публикации

SELF-ALIGNING CAM FOLLOWER ROLLER DEVICE

Номер: US20190024773A1
Автор: CHAMBONNEAU Charles, Chollet Mickael, Hauvespre Benoît, Perrotin Thomas, Rabin Michel, Thibault Mathieu, TRONQUOY Nicolas
Принадлежит:

A cam follower roller device including a tappet body extending along a longitudinal axis and defining a tappet bore, a pin centered on a transverse axis, through holes having mounting ends for supporting the pin on the tappet body, and a roller rotatably mounted on the pin around the transverse axis, the roller having a cylindrical outer surface, a central cylindrical bore and two frontal end faces. Transverse gaps are provided between frontal end faces of the roller and the tappet bore, and the central cylindrical bore of the roller is mounted around an annular rolling surface of transverse convex profile. 1. A cam follower roller device comprising:a tappet body extending along a longitudinal axis and defining a tappet bore,a pin centered on a transverse axis, support means mounting ends of the pin on the tappet body, anda roller rotatably mounted on the pin around the transverse axis, the roller having a cylindrical outer surface, a central cylindrical bore and two frontal end faces, andtransverse gaps provided between frontal end faces of the roller and the tappet bore, the central cylindrical bore of the roller being mounted around an annular rolling surface of transverse convex profile.2. The cam follower roller device according to claim 1 , wherein the roller is directly mounted around the pin claim 1 , the pin comprising an outer surface forming the annular rolling surface of transverse convex profile.3. The cam follower roller device according to claim 1 , wherein the cam follower roller device further comprises a sliding bushing interposed between central cylindrical bore of roller and an outer surface of pin claim 1 , the sliding bushing comprising an outer surface forming the annular rolling surface of transverse convex profile.4. The cam follower roller device according to claim 1 , wherein the transverse convex profile of the annular rolling surface is logarithmic.5. The cam follower roller device according to claim 1 , wherein the tappet body comprises ...

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Номер записи: 22
04-02-2016 дата публикации

MECHANICAL FUEL PUMP DEACTIVATION

Номер: US20160032878A1
Автор: Cecil Adam C.
Принадлежит:

A mechanical fuel pump is disclosed for delivering fuel to an engine of a vehicle, the mechanical fuel pump having an activated configuration and a deactivated configuration. A dual fuel system and method are also disclosed for use with the mechanical fuel pump. 1. A fuel pump comprising:a rotatable camshaft including at least one lobe;a pump housing defining a pump chamber;a pump piston reciprocally mounted in the pump chamber; and a first configuration wherein the deactivating element transfers movement of the at least one lobe to the pump piston to deliver fuel to an engine; and', 'a second configuration wherein the deactivating element absorbs movement of the at least one lobe to deactivate the fuel pump., 'a deactivating element operatively positioned between the at least one lobe and the pump piston, the deactivating element having2. The fuel pump of claim 1 , wherein the deactivating element is rigid in the first configuration and collapsible in the second configuration.3. The fuel pump of claim 1 , wherein the deactivating element comprises:an outer body;an inner body; and a locked position corresponding to the first configuration, wherein the inner body moves with the outer body in the locked position; and', 'an unlocked position corresponding to the second configuration, wherein the inner body moves relative to the outer body in the unlocked position., 'at least one locking pin being movable between4. The fuel pump of claim 3 , wherein claim 3 , in the unlocked position of the at least one locking pin claim 3 , at least one spring forces the at least one locking pin radially inward and away from the outer body.5. The fuel pump of claim 3 , wherein the at least one locking pin is biased in the unlocked position.6. The fuel pump of claim 3 , wherein claim 3 , in the locked position of the at least one locking pin claim 3 , a pressurized fluid in the inner body forces the at least one locking pin radially outward and toward the outer body.7. The fuel pump of ...

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Номер записи: 23
17-02-2022 дата публикации

High-Pressure Fuel Pump

Номер: US20220049674A1
Автор: Dong Ziang, Huang Yingsa, JIANG Xiaoyan
Принадлежит:

A high-pressure fuel pump includes a drive shaft, and a vane pump and a plunger pump which are driven by the drive shaft. The vane pump is configured to supply pre-pressurized fuel to the plunger pump. The drive shaft includes a cam configured to drive a piston rod of the plunger pump such that the plunger pump alternately executes a fuel suction stroke and a fuel discharge stroke. The drive shaft further includes a shaft portion for driving a rotor of the vane pump. The vane pump is configured such that for each fuel suction stroke of the plunger pump the vane pump provides a fuel supply cycle that is advanced by a phase angle relative to the fuel suction stroke. 1. A high-pressure fuel pump , comprising:a drive shaft; anda vane pump and a plunger pump which are driven by the drive shaft, the vane pump being configured to supply pre-pressurized fuel to the plunger pump;wherein the drive shaft comprises a cam configured to drive a piston rod of the plunger pump such that the plunger pump executes a working cycle consisting of a fuel suction stroke and a fuel discharge stroke alternating with each other,wherein the drive shaft further comprises a shaft portion for driving a rotor of the vane pump, andwherein the vane pump is configured such that for each fuel suction stroke of the plunger pump the vane pump provides a fuel supply cycle that is advanced by an advance phase angle relative to the fuel suction stroke.2. The high-pressure fuel pump as claimed in claim 1 , wherein:the vane pump is configured such that a starting point of each fuel suction stroke of the plunger pump falls within a trough of one fuel supply cycle of the vane pump; and/oran end point of the fuel suction stroke falls within a trough of the following fuel supply cycle of the vane pump.3. The high-pressure fuel pump as claimed in claim 1 , wherein the vane pump comprises multiple radially slidable vanes borne by the rotor claim 1 , the multiple vanes being uniformly distributed at equal angular ...

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Номер записи: 24
30-01-2020 дата публикации

LIGHTWEIGHT-CONSTRUCTION ROLLER TAPPET

Номер: US20200032678A1
Автор: Geyer Norbert
Принадлежит: SCHAEFFLER TECHNOLOGIES AG & CO. KG

This disclosure relates to a roller tappet, in particular for a high-pressure fuel pump. The roller tappet is guided in a direction of a longitudinal axis thereof in a housing receptacle and is driven in the longitudinal direction by cams of a camshaft. The roller tappet has a tappet body. The tappet body has a tappet skirt, a pump piston contact seat, and a rotatably mounted roller, by means of which the roller tappet is supported on the camshaft. The tappet body has a guide cylinder, which is mounted in the housing receptacle and on which the roller is mounted, and a cup-shaped sleeve having the pump piston contact point, which cup-shaped sleeve is supported axially and radially in the guide cylinder. 1. A multi-part roller tappet for a high-pressure fuel pump , which is adapted to be guided in a direction of a longitudinal axis thereof in a housing receptacle and is adapted to be driven movably in a longitudinal direction by cams of a camshaft , the roller tappet comprising:a tappet body including a tappet skirt,a pump piston contact seat,a rotatably mounted roller adapted to support the roller tappet on the camshaft,the tappet body further comprising a guide cylinder adapted to be mounted in the housing receptacle and on which the roller is supported, the pump piston contact seat,', 'a radially outward-facing radial ring between axial ends of the sleeve, and', 'the guide cylinder includes a cylindrical constriction groove at an axial level of the radial ring of the sleeve,', 'the radial ring of the sleeve is secured on an inner lateral surface of the constriction groove,', 'the sleeve includes an end ring with a radially projecting bead,', 'the guide cylinder includes two supports in a region of an axial end of the guide cylinder which is close to the roller, the supports each having a hole to receive a pin which rotatably supports the roller, and', 'the radially projecting bead rests axially against the two supports., 'a cup-shaped sleeve having2. The roller ...

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Номер записи: 25
05-02-2015 дата публикации

FUEL SUPPLY PUMP

Номер: US20150037182A1
Автор: Aoki Kenji
Принадлежит:

A fuel supply pump in which even when a tappet slides at high speed, a sliding balance of the tappet is maintained and improved durability is achieved by preventing one-sided contact between the tappet and a cylinder hole. 1. A fuel supply pump comprising:a pump housing;a cylinder head that is fitted to a cylinder hole formed in the pump housing;a plunger that is slidably fitted to a sliding hole formed in the cylinder head;a tappet that is slidably fitted to the cylinder hole;a cam shaft that is rotatably supported in a cam chamber formed inside the pump housing so as to communicate with the cylinder hole;a cam that is formed integrally with the cam shaft; anda plunger spring that is interposed between the cylinder head and the tappet,wherein the tappet is configured to have a cylindrical tappet body and a roller,wherein a cylindrical guide ring is fixed into the cylinder hole, andwherein in the tappet body and a cylindrical portion of the guide ring, a tappet side guide portion and a guide ring side guide portion which can be fitted thereto in an axial direction are provided in at least two locations at equal intervals.2. The fuel supply pump according to claim 1 ,further comprising means for preventing pivotal movement of the guide ring which is configured between the guide ring and at least one of the pump housing and the cylinder head.3. The fuel supply pump according to claim 1 ,wherein the guide ring includes a seat flange portion which seats the plunger spring, and the seat flange portion is interposed between the plunger spring and the cylinder head.4. The fuel supply pump according to claim 1 ,wherein the guide ring is molded integrally with the cylinder head.5. The fuel supply pump according to claim 1 ,wherein a shape of the tappet side guide portion is a tapered shape.6. The fuel supply pump according to claim 1 ,wherein the guide ring side guide portion is formed in a concave shape and the tappet side guide portion is formed in a convex shape.7. The ...

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Номер записи: 26
04-02-2021 дата публикации

FUEL INJECTION SYSTEM AND CONTROLLER FOR FUEL INJECTION SYSTEM

Номер: US20210033043A1
Автор: ISHIKAWA Tamaki
Принадлежит:

A fuel pump includes a camshaft that rotates in accordance with operation of an engine and a tappet provided in contact the camshaft. An ECU includes an angle determination unit configured to determine whether a rotation angle from a start of rotation of the camshaft when starting the engine is under a predetermined angle required for forming an oil film on a sliding portion of the tappet, and a control unit configured to, when the rotation angle from the start of rotation of the camshaft is determined to be under the predetermined angle, execute a limit process including at least one of limiting a fuel discharge pressure of the fuel pump or limiting a rotation of the camshaft. 1. A controller for a fuel injection system including a fuel pump having a camshaft that rotates in accordance with operation of an internal combustion engine , a tappet provided in contact with a cam of the camshaft that converts the rotation of the camshaft into linear motion , and a plunger that reciprocates according to the linear motion of the tappet , the fuel pump being configured to suck and discharge fuel according to the reciprocation of the plunger , an accumulator that stores high pressure fuel discharged from the fuel pump , and a fuel injection valve that injects the high pressure fuel stored in the accumulator into a combustion chamber of the internal combustion engine , the controller comprising:an angle determination unit configured to determine whether a rotation angle from a start of rotation of the camshaft when starting the internal combustion engine is under a predetermined angle required for forming an oil film on a sliding portion of the tappet, and when the rotation angle from the start of rotation of the camshaft is determined to be under the predetermined angle, execute a limit process including at least one of limiting a fuel discharge pressure of the fuel pump or limiting a rotation of the camshaft, and', 'when the rotation angle is determined to have exceeded the ...

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Номер записи: 27
06-02-2020 дата публикации

Multi-part roller tappet

Номер: US20200041018A1
Автор: Norbert Geyer
Принадлежит: Schaeffler Technologies AG and Co KG

A roller tappet, in particular for a high-pressure fuel pump, is provided that is guided in the direction of the longitudinal axis thereof in a housing receptacle and is driven translatably in the longitudinal direction by cams of a camshaft. The roller tappet has a tappet body. This tappet body has a tappet skirt, a pump piston contact point (9), and a rotatably mounted roller (4), by which the roller tappet is supported on the camshaft. The tappet body has a guide cylinder (1), which is mounted in the housing receptacle and on which the roller (4) is supported, and a cup-shaped sleeve (7) having the pump piston contact point (9), which cup-shaped sleeve is supported in the guide cylinder (1) by a radial ring (8). A cylindrical constriction (5) is formed in the guide cylinder (1) in the region of the radial ring support.

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Номер записи: 28
03-03-2022 дата публикации

High pressure pump for vehicle

Номер: US20220065206A1
Автор: Hyeong Kyun Park, Jin Sung Kim, Kyung Chul HAN
Принадлежит: Hyundai Kefico Corp

A high pressure pump includes a housing with a chamber formed inside and a flow control valve and a discharge check valve installed in the chamber; a piston installed to operate up and down in an assembly hall formed in the housing to compress fuel in the chamber to a high pressure; a cylinder forming a gap between an inner circumferential surface and the piston and guiding reciprocation of the piston; and a support member seated on a stepped surface of the housing to surround an outside of the cylinder and configured to elastically support the housing and the cylinder, thereby reducing friction while preventing fuel leakage between the piston and the cylinder.

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Номер записи: 29
25-02-2021 дата публикации

FUEL INJECTION PUMP

Номер: US20210054815A1
Автор: Makino Tadaaki, TAKAMIZAWA Satoru
Принадлежит:

A fuel injection pump includes: a tappet configured to reciprocate by rotation of a cam; a cylinder that supports the tappet to reciprocate; and a plunger configured to reciprocate with the tappet. The tappet includes: a tappet body supported by the cylinder to reciprocate; a pin supported on both sides in an axial direction of the pin by the tappet body; a roller rotatably fitted to an outer peripheral side of the pin; a washer disposed between at least one end surface of the roller in the axial direction and an inner peripheral surface of the tappet body. The washer has at least one protrusion to be in contact with a stopper of the tappet body in either of two rotational directions. 1. A fuel injection pump comprising:a tappet configured to reciprocate by rotation of a cam;a cylinder that supports the tappet to reciprocate; anda plunger configured to reciprocate with the tappet to discharge pressurized fuel, wherein a tappet body supported by the cylinder to reciprocate,', 'a pin supported on both sides in an axial direction of the pin by the tappet body,', 'a roller rotatably fitted to an outer peripheral side of the pin, the roller rotating and reciprocating by rotation of the cam to cause the plunger and the tappet body to reciprocate, and', 'a washer disposed between at least one end surface of the roller in the axial direction and an inner peripheral surface of the tappet body, and', 'the washer has at least one protrusion to be in contact with a stopper of the tappet body in either of two rotational directions., 'the tappet includes'}2. The fuel injection pump according to claim 1 , whereinthe washer is formed in an annular shape, and an inner circumference of the washer is supported by the pin, the roller, or a bush fitted to the outer peripheral side of the pin to rotatably support the roller.3. The fuel injection pump according to claim 1 , whereinan end surface of the washer facing the roller has an abrasion resistance coating.4. The fuel injection pump ...

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Номер записи: 30
23-02-2017 дата публикации

FUEL RAIL FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20170051715A1
Автор: Avireddi Prashanth, McCune Donald J.
Принадлежит:

A fuel rail for a direct injection engine. The fuel rail includes an elongated tubular housing which defines an elongated main chamber. An elongated tube is disposed in the main chamber of the housing and defines an inlet chamber inside of the tube and an annular outlet chamber between the housing and the tube. The tube has a fuel inlet open to its inlet chamber and adapted for connection with a fuel pump. At least two orifices are formed through the tube which fluidly connects the inlet chamber with the outlet chamber. The orifices are positioned and sized to minimize fuel pressure gradients in the fuel rail caused by fuel injection by the fuel injectors. 1. A fuel rail for a liquid fuel injection internal combustion engine having fuel injectors fluidly connected to the rail comprising:an elongated tubular housing defining an elongated main chamber,an elongated tube disposed in said main chamber of said housing and defining an inlet chamber inside said tube and an annular outlet chamber between said housing and said tube,said tube having a fuel inlet open to said inlet chamber,at least two orifices formed through said tube which fluidly connects said inlet chamber to said outlet chamber, said orifices being positioned and independently sized.2. The fuel rail as defined in and comprising a plurality of longitudinally spaced orifices formed through said tube which fluidly connects said inlet chamber to said outlet chamber.3. The fuel rail as defined in wherein the fuel rail supplies fuel to a fixed number of fuel injectors and wherein said at least one orifice comprises said fixed number of orifices.4. The fuel rail as defined in and comprising said fixed number of longitudinally spaced fuel injector ports formed through said housing and wherein said orifices are positioned intermediate said fuel injector ports or intermediate an end fuel injector port and an end of said housing.5. The fuel rail as defined in and comprising at least one spacer in said outlet chamber ...

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Номер записи: 31
21-02-2019 дата публикации

PUMPING ASSEMBLY TO FEED FUEL, PREFERABLY DIESEL FUEL, TO AN INTERNAL COMBUSTION ENGINE

Номер: US20190055942A1
Автор: Scamarcio Riccardo
Принадлежит:

A pumping assembly to feed fuel, preferably diesel fuel, to an internal combustion engine is provided with an electric gear pump () having two gears () mounted one inside the other, and of which one is an annular rotor () mounted rotatably on the inside of a stator () through the interposition of a support bearing (), which is delimited by a substantially cylindrical side wall () having at least one strip () of elastically deformable material which is substantially parallel to a rotation axis () of said rotor (). 13637672829332929423433373442433033434247. A pumping assembly to feed fuel to an internal combustion engine () , the pumping assembly comprising a high-pressure pump () to feed fuel to the internal combustion engine (); and a gear pump () to feed fuel to the high-pressure pump (); the gear pump () comprising an electric motor () having a stator () , an annular rotor () mounted on an inside of the stator () and coupled to the stator () in a rotary manner through the interposition of a support bearing () , and an outer gear () on on an inside of the rotor (); and an inner gear () , which is mounted on an inside of and is coupled to said outer gear (); the support bearing () being delimited by a substantially cylindrical side wall () coaxial to a rotation axis () of the rotor (); wherein the side wall () of the support bearing () comprises at least one strip () of elastically deformable material.2473033. A pumping assembly according to claim 1 , wherein the strip () of elastically deformable material is substantially parallel to the rotation axis () of the rotor ().342464746. A pumping assembly according to claim 1 , wherein the support bearing () is axially delimited by two opposite end faces (); the strip () of elastically deformable material extending between the two end faces ().447. A pumping assembly according to claim 1 , wherein the strip () of elastically deformable material is made of rubber.5434244303345. A pumping assembly according to claim 1 , ...

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Номер записи: 32
28-02-2019 дата публикации

Modular Direct Injection Fuel Pump Assembly

Номер: US20190063389A1
Автор: Haines Jason
Принадлежит:

The present invention relates generally to a modular direct injection fuel pump assembly that can be used as a primary or auxiliary fuel pump and that can be retrofitted easily to existing engines, and preferably to engine-driven vehicles, and that can be used to provide the pressure and flow required for a direct injection system, to improve the performance of a direct injection system, as part of the conversion of a port fuel injection system to a direct injection system, or to replace or supplement an existing direct injection system. 1. A modular direct injection fuel pump assembly comprising:(a) a housing comprising an engine mount and one or more mounting points;(b) within the housing, a drive mechanism; and(c) at least one direct injection fuel pump mounted to at least one of said mounting points, wherein said direct injection fuel pump is operatively connected to said drive mechanism.2. The direct injection fuel pump assembly of claim 1 , wherein said drive mechanism is operatively connected to a combustion engine claim 1 , said operative connection between said drive mechanism and said combustion engine comprises a pulley claim 1 , said drive mechanism comprises a camshaft comprising one or more lobes claim 1 , and said operative connection between said camshaft and said direct injection fuel pump comprises a plunger mechanically linking at least one lobe of said camshaft operatively to said direct injection fuel pump.3. The direct injection fuel pump assembly of comprising two mounting points claim 2 , wherein one direct injection fuel pump is mounted to each of said mounting points claim 2 , said camshaft comprises two or more lobes claim 2 , and each of said direct injection fuel pumps is operatively connected to said camshaft claim 2 , said operative connection comprising a plunger.4. The direct injection fuel pump assembly of claim 3 , wherein each mounting point is separated from each other mounting point by approximately 180 degrees.5. The direct ...

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Номер записи: 33
28-02-2019 дата публикации

FOLLOWER MECHANISM

Номер: US20190063580A1
Автор: Abrahamson Scott
Принадлежит:

A follower mechanism including an outer cup having a substantially cylindrical side wall, an annular lip portion disposed at a first end of the side wall, and an annular ledge disposed on the side wall, the annular ledge being disposed in a plane that is transverse to a longitudinal center axis of the follower mechanism. An inner cup includes an annular lip extending outwardly therefrom and a pair of shaft apertures, and is disposed in the outer cup so that the lip abuts the annular ledge of the outer cup and is non-rotatably fixed thereto by the annular lip of the outer cup which abuts the lip of the inner cup. A shaft is received in the shaft apertures, and a roller follower is rotatably received on the shaft such that a portion of the roller follower extends axially outwardly beyond the annular lip portion of the outer cup. 1an outer cup having an inner surface and an outer surface defining a substantially cylindrical side wall, a first annular lip portion disposed at a first end of the side wall, and a second annular lip portion disposed at a second end of the side wall, wherein the first and second annular lip portions extend radially and inwardly from the side wall;a spacer element including a cylindrical side wall, a top wall extending inwardly from a first end of the sidewall, and a bottom edge disposed along a second end of the side wall, wherein the spacer element is disposed inside the outer cup with its bottom edge adjacent the second annular lip portion of the outer cup;an inner cup including a pair of shaft apertures, the inner cup being disposed in the outer cup so that a bottom surface of the inner cup abuts the top wall of the spacer element and is axially fixed thereto by the second annular lip portion of the outer cup which abuts a top edge of the inner cup;a shaft having a first end and a second end, each of the first end and the second end being disposed in a corresponding one of the shaft apertures; anda roller follower rotatably received on ...

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Номер записи: 34
27-02-2020 дата публикации

Energy-storing-type high pressure electric fuel pump, fuel-supplying apparatus, and applications thereof

Номер: US20200063728A1
Автор: Chengwen Liu, Daguang Xi, Ping Zhang, Yanxiang Yang
Принадлежит: Zhejiang Fai Electronics Co Ltd

An energy-storing-type high-pressure electric fuel pump comprises an electromagnetic driving apparatus and a plunger sleeve cylinder component. The plunger sleeve cylinder component comprises a high-pressure volume, a plunger sleeve having a plunger hole, and a plunger capable of sliding within the plunger hole. A clearance volume of the plunger in the plunger hole is a high-pressure fuel chamber. A clearance volume between the electromagnetic driving apparatus and the plunger sleeve cylinder component forms a low-pressure fuel chamber. Under the action of the electromagnetic driving apparatus, the plunger sleeve cylinder component sucks a fuel in the low-pressure fuel chamber into the high-pressure fuel chamber and pressure-feeds the fuel into the high-pressure volume. The electromagnetic driving apparatus comprises an energy storage apparatus, a movable part, and a still part.

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Номер записи: 35
09-03-2017 дата публикации

Fuel injection system

Номер: US20170067429A1
Автор: Lihang Nong
Принадлежит: Picospray Inc

A fuel injector is provided. The fuel injector includes a sleeve having a first end proximate an outlet; a piston slidingly received in the sleeve, the piston having a first end proximate the outlet; a pumping chamber at least partially defined by the sleeve between the first end of the piston and the outlet; and a normally-open inlet valve through which fuel passes to enter the pumping chamber.

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Номер записи: 36
24-03-2022 дата публикации

METHOD FOR MANAGING A PISTON PUMP FOR A HEAT ENGINE

Номер: US20220090557A1
Автор: MOINE Xavier
Принадлежит:

Disclosed is a method for managing a piston pump using a computer of a vehicle, the pump including a guide, a piston slidably mounted in the guide, and a solenoid, suitable for moving the piston, the method including, as long as the fuel pressure in the compression chamber of the pump is below a predetermined pressure threshold, a step of the computer controlling the solenoid in order to move the piston to its high position, and a step of the computer detecting that the predetermined pressure threshold has been exceeded when the current value, measured after a predetermined period, is greater than or equal to a predetermined reference value so that the computer ceases to control the solenoid. 1. A method for managing a piston pump of a fuel injection system on board a combustion engine vehicle using a computer of said vehicle , in the starting phase of the vehicle during which the pump operates to pressurize the fuel when the combustion engine has not yet started , said pump comprising a guide , a piston slidably mounted in said guide in order to form a fuel compression chamber , and a solenoid suitable for , when a control current generated by the computer passes through the solenoid , moving the piston between a low position in which the compression chamber is suitable for being emptied of fuel and a high position in which the compression chamber is suitable for being filled with fuel— the intake phase— and a return spring acting on the piston to return the piston to the low position in the absence of said control current passing through the solenoid— the compression phase— said method comprising , as long as the fuel pressure in the compression chamber is below a predetermined pressure threshold:the piston initially being under the effect of the return spring, causing the computer controlling the solenoid to move the piston to the piston's high position,after a predetermined period, causing the computer to measure a value of the intensity of the current passing ...

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Номер записи: 37
16-03-2017 дата публикации

FUEL SUPPLY APPARATUS FOR INTERNAL COMBUSTION ENGINE

Номер: US20170074202A1
Автор: ASAYAMA Kazuhiro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A fuel supply apparatus for an internal combustion engine includes a motor, a fuel pump, an alternator, a centrifugal clutch, and an electronic control unit. The centrifugal clutch is configured to, when the rotation speed of the output shaft of the motor is higher than or equal to an engaging rotation speed, connect the output shaft of the motor with the rotary shaft of the alternator. The engaging rotation speed is a rotation speed higher than a rotation speed of the rotary shaft at which torque that acts on the rotary shaft as a result of generation of electric power by the alternator becomes maximum and is a rotation speed lower than a rotation speed at which torque for driving the high-pressure fuel pump cannot be provided by only the motor at the time when the motor is driven at rated output power. 1. A fuel supply apparatus for an internal combustion engine , the fuel supply apparatus comprising:a motor including an output shaft;a fuel pump configured to be driven by rotation of the output shaft of the motor, the fuel pump being configured to supply pressurized fuel to the internal combustion engine;an alternator including a rotary shaft that rotates with rotation of a crankshaft of the internal combustion engine, the alternator being configured to generate electric power as the rotary shaft is rotated;a centrifugal clutch interposed between the output shaft of the motor and the rotary shaft of the alternator, the centrifugal clutch being configured to, when a rotation speed of the output shaft of the motor is higher than or equal to an engaging rotation speed, connect the output shaft of the motor with the rotary shaft of the alternator, the centrifugal clutch being configured to, when the rotation speed of the output shaft of the motor is lower than the engaging rotation speed, disconnect the output shaft of the motor from the rotary shaft of the alternator, the engaging rotation speed being a rotation speed higher than a rotation speed of the rotary shaft ...

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Номер записи: 38
16-03-2017 дата публикации

FUEL PUMP MOUNTING STRUCTURE FOR ENGINE

Номер: US20170074221A1
Автор: Miyamae Toru, SHIMOGAWA Yuki
Принадлежит: MAZDA MOTOR CORPORATION

In a structure for mounting, on a cylinder block, a fuel pump including a fuel pump drive shaft which is rotated by receiving a driving force of a crankshaft, and a fuel pump body which is operated as the fuel pump drive shaft is rotated for pumping fuel, the cylinder block includes a flange portion, on an end portion of the cylinder block in the crankshaft direction, projecting from a surface of the end portion along the crankshaft direction in a direction orthogonal to the crankshaft direction. The flange portion includes a bearing portion which rotatably supports the fuel pump drive shaft, and a pump accommodating hole portion which accommodates the fuel pump body. The fuel pump drive shaft is rotatably supported on the bearing portion, and the fuel pump body is accommodated in the pump accommodating hole portion. 1. A fuel pump mounting structure for an engine , for mounting , on a cylinder block , a fuel pump including a fuel pump drive shaft which is rotated by receiving a driving force of a crankshaft , and a fuel pump body which is operated as the fuel pump drive shaft is rotated for pumping fuel , whereinthe cylinder block includes a flange portion, on an end portion of the cylinder block in a crankshaft direction, projecting from a surface of the end portion along the crankshaft direction in a direction orthogonal to the crankshaft direction, the flange portion including a bearing portion which rotatably supports the fuel pump drive shaft, and a pump accommodating hole portion which accommodates the fuel pump body,the fuel pump drive shaft is rotatably supported on the bearing portion, andthe fuel pump body is accommodated in the pump accommodating hole portion.2. The fuel pump mounting structure for an engine according to claim 1 , whereina cam for driving the fuel pump body is formed on an axially intermediate portion of the fuel pump drive shaft, andthe flange portion includes a flange portion body, and a cover member mounted on the flange portion body ...

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Номер записи: 39
02-04-2015 дата публикации

Mechanical System, Injection Pump And Valve Actuator Comprising Such A Mechanical System And Manufacturing Method

Номер: US20150090205A1
Автор: Benoît Hauvespre, Charles Chambonneau, Francois Champalou, Nicolas Berruet, Samuel Viault
Принадлежит: SKF AB

A mechanical system, comprising a tappet including a body, a support element defining two bores centered on a first axis, a pin comprising two opposite ends each adapted to be fitted in one of the two bores, and a roller element positioned between the two bores along the first axis and movable in rotation relative to the pin around the first axis. The support element is distinct from the body and fixed thereto, and the support element also comprises at least one antirotation device integrally formed thereto. The mechanical system can be integrated into an injection pump and/or a valve actuator.

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Номер записи: 40
02-04-2015 дата публикации

Mechanical System, Injection Pump And Valve Actuator Comprising Such A Mechanical System And Manufacturing Method

Номер: US20150090209A1
Автор: Berruet Nicolas, CHAMBONNEAU Charles, Hauvespre Benoît, Viault Samuel
Принадлежит: AKTIEBOLAGET SKF

A mechanical system comprising: a tappet, including a body; an insert mounted in the body; a pin extending along a first axis; and a roller element movable in rotation relative to the pin around the first axis. The insert supports the pin, while the body supports the insert, along at least one first direction parallel to a second axis which is perpendicular to the first axis. The mechanical system can be integrated into an injection pump and/or a valve actuator. 1. A mechanical system , comprising:a tappet including a body,an insert mounted in the body,a pin extending along a first axis, anda roller element movable in rotation relative to the pin around the first axis,wherein the insert supports the pin, while the body supports the insert, along at least one first direction parallel to a second axis which is perpendicular to the first axis.2. The mechanical system according to claim 1 , wherein the body includes at least one local deformation adapted to prevent the insert from moving along the first direction when the mechanical system is in service.3. The mechanical system according to claim 1 , the body includes at least one local deformation adapted to prevent the insert from moving along a second direction opposed to the first direction along the second axis when the mechanical system is in service.4. The mechanical system according to claim 1 , wherein the insert comprises two support portions and the pin comprises two opposite ends claim 1 , each supported by one of the two support portions of the insert along at least the first direction.5. The mechanical system according to claim 1 , wherein the body has a cylindrical shape centered on the second axis.6. The mechanical system according to claim 1 , wherein the tappet is devoid of any through hole extending between an outer surface and an inner surface of the body.7. The mechanical system according to claim 1 , further comprising two ribs resting on either side of the ends of the pin for axial retention of ...

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Номер записи: 41
21-03-2019 дата публикации

Welded high-pressure fuel pump roller tappet

Номер: US20190085731A1
Автор: Haijun Ren, HUA Dong, Na Xu
Принадлежит: Hangzhou XZB Tech Co Ltd

A welded high-pressure fuel pump roller tappet, which is used for the fuel injection system in an engine, includes a guide sleeve, a U-shaped holder and a pin-shaft-roller set. Symmetrical positions on the upper portion of left and right sidewalls of the guide sleeve are provided with inflexed flanges. Two sides of the flange are folded inwardly to form a limiting slot. The U-shaped holder includes a bottom plate and side plates located on left and right sides of the bottom plate. Symmetrical positions on two side plates are provided with axle holes. The pin-shaft-roller set is set up between two side plates of the U-shaped holder. Symmetrical positions on the upper portion of the flange are provided with opening slots. After assembly, the U-shaped holder is located between two flanges. Two side plates are located inside the limiting slots in the flanges.

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Номер записи: 42
21-03-2019 дата публикации

HIGH-PRESSURE FUEL PUMP

Номер: US20190085804A1
Автор: Han Kyung Chul, Hong Chun Ky, Kim Jin Sung, Nah Eun Woo
Принадлежит:

Disclosed herein is a high-pressure fuel pump. The high-pressure fuel pump includes a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage. The high-pressure fuel pump further includes a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber; and a discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of fuel stored in the chamber is equal to or greater than a first pressure, the discharge valve including an open-and-close member that makes line contact with an inlet of the discharge valve to close the inlet. 1. A high-pressure fuel pump comprising:a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw the fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage;a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber; anda discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of the fuel stored in the chamber is equal to or greater than a first pressure, the discharge valve including an open-and-close member that makes line contact with an inlet of the discharge valve to close the inlet.2. The high-pressure fuel pump according to claim 1 , wherein the discharge valve comprises:a valve housing inserted into and coupled to the discharge flow passage, and having the inlet through which the fuel is drawn into the valve housing;the open-and-close ...

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Номер записи: 43
21-03-2019 дата публикации

HIGH-PRESSURE FUEL PUMP

Номер: US20190085807A1
Автор: Han Kyung Chul, Hong Chun Ky, Kim Jin Sung, Nah Eun Woo
Принадлежит:

A high-pressure fuel pump includes a housing including a chamber, an inlet flow passage to draw fuel into the chamber, and a discharge flow passage to discharge fuel out of the chamber. The high-pressure fuel pump further includes a piston disposed in the housing and configured to compress fuel, a sleeve coupled to the housing and configured to support the piston and form a space for storing fuel, a discharge valve disposed in the discharge flow passage and configured to open when a pressure of fuel stored in the chamber is equal to or greater than a first pressure, and a pressure relief valve disposed in a relief flow passage that communicates with the discharge flow passage and the space. The pressure relief valve is configured to open when a pressure of fuel supplied into the relief flow passage is equal to or greater than a second pressure. 1. A high-pressure fuel pump comprising:a housing including a chamber provided to compress fuel supplied thereinto, an inlet flow passage that communicates with the chamber to draw the fuel into the chamber through the inlet flow passage, and a discharge flow passage that communicates with the chamber to discharge the fuel out of the chamber through the discharge flow passage;a piston disposed in the housing and configured to linearly reciprocate to compress the fuel supplied into the chamber;a sleeve coupled to the housing and configured to support the piston and form a space for storing the fuel within the housing;a discharge valve disposed in the discharge flow passage of the housing and configured to open when a pressure of the fuel stored in the chamber is equal to or great than a first pressure; anda pressure relief valve disposed in a relief flow passage which is formed in the housing and communicates with the discharge flow passage and the space, the pressure relief valve being configured to open when a pressure of the fuel supplied into the relief flow passage is equal to or greater than a second pressure.2. The high ...

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Номер записи: 44
30-03-2017 дата публикации

SINGLE PISTON PUMP WITH REDUCED PISTON SIDE LOADS

Номер: US20170089311A1
Автор: Lucas Robert G.
Принадлежит:

In a tappet-driven single piston pump, piston side loads caused by return spring out-of-squareness are eliminated by effectively piloting the piston return spring, preferably the associated spring seat, by the tappet, thereby allowing the tappet to bear the spring side load. The piston engages and is returned by the spring seat, but radial clearance between the piston and spring seat is greater than radial clearance between the spring seat and tappet, thus eliminating side loading imparted to the piston. The spring seat can be considered a piston retainer, in which the piston is not closely attached to the retainer but instead exhibits a predefined radial clearance greater than the piloting clearance between the retainer and the tappet. 1. A cam-driven high pressure single piston fuel pump having a pump housing , a pumping chamber within the pump housing , a piston with one end in the pumping chamber and another end outside the pump housing , a bore within the housing in which the piston reciprocates on a pumping axis between a retracting motion during which fuel is delivered to the pumping chamber and a pumping motion during which the piston pressurizes fuel in the pumping chamber , a tappet coaxially aligned with the piston , having one end adapted to be reciprocally driven by a rotating cam and another end operatively associated with the other end of the piston for reciprocating the piston; a coil return spring seated between the housing and a retainer , with the return spring and retainer coaxially aligned with the piston and operatively associated with the piston , for biasing the other end of the piston away from the pumping chamber; wherein the tappet and the retainer have radially overlapping concentric walls with a radial gap that accommodates side loads on the spring.2. The fuel pump of claim 1 , wherein the other end of the piston is operatively associated with the retainer by a profiled tip of the piston that is captured in a recess of the retainer with ...

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Номер записи: 45
09-04-2015 дата публикации

Mechanical System, Injection Pump And Valve Actuator Comprising Such A Mechanical System And Manufacturing Method

Номер: US20150096515A1
Автор: Benoît Hauvespre, Charles Chambonneau, Francois Champalou, Nicolas Berruet, Samuel Viault
Принадлежит: SKF AB

A mechanical system, comprising a support element, a pin extending along a first axis and comprising two opposite ends, each adapted to be fitted in the support element for radial retention of the pin relative to the first axis, and a roller element movable in rotation relative to the pin around the first axis. The mechanical system includes two ribs resting on either side of the ends for axial retention of the pin along the first axis. The mechanical system can be integrated into either an injection pump or a valve actuator.

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Номер записи: 46
19-03-2020 дата публикации

HIGH-PRESSURE PUMP

Номер: US20200088147A1
Автор: Koga Tatsuro, Matsumoto Noriya
Принадлежит:

In a high-pressure pump, a relief valve seating surrounds an opening of a relief valve passage of a valve seat main body in a first space, A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction. 1. A high-pressure pump comprising:a pump body including a pressurizing chamber that pressurizes a fuel, and a discharge passage through which the fuel pressurized and discharged by the pressurizing chamber flows;a valve seat portion including a relief valve seat;a discharge valve member that is disposed in the discharge passage and allows a flow of the fuel in a direction away from the pressurizing chamber from one side to another of the discharge valve member;a relief valve member that is disposed in the discharge passage between the pressurizing chamber and a downstream of the discharge valve member and allows a flow of the fuel in a direction toward the pressurizing chamber from one side to another of the relief valve member;a relief valve urging member that urges the relief valve member in a direction away from the pressurizing chamber; anda support portion that guides a reciprocating movement of the relief valve member in an axial direction, whereinthe relief valve member includes a relief valve main body having a rod shape, a relief valve seat portion capable of contacting the relief valve seat, and a valve member protrusion portion provided radially outward of the relief valve main body and contacting one end of the relief valve urging member,the support ...

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Номер записи: 47
28-03-2019 дата публикации

PISTON DEVICE AND PUMP DEVICE

Номер: US20190093616A1
Автор: Hocker Klaus, Klein Patrick, Kopp Fabian
Принадлежит:

In order to provide a piston device that is of simple construction and provides optimised sealing, it is proposed that the piston device should include the following: a housing that includes a piston receptacle; a piston that is arranged to be linearly displaceable in the piston receptacle; a main gasket element that separates a first medium space from a second medium space, and a supplementary gasket element, different from the main gasket element, for sealing in a region between the piston and the piston receptacle. 2. A piston device according to claim 1 , wherein the piston receptacle includes a guide device against which the piston abuts and by means of which the piston is guided in linearly displaceable manner claim 1 , wherein the supplementary gasket element abuts on one side against a guide element of the guide device and on the other against the piston.3. A piston device according to claim 2 , wherein the guide element takes the form of a hollow slide cylinder.4. A piston device according to claim 2 , wherein the piston is movable to and fro between two end positions claim 2 , wherein claim 2 , in one end position of the piston claim 2 , in which it is moved to the maximum extent in the direction of the second medium space claim 2 , the supplementary gasket element is arranged in an end region of the guide device that faces the second medium space.5. A piston device according to claim 1 , wherein the supplementary gasket element takes a resilient form and/or the form of a sealing ring forming a closed ring claim 1 , in particular a piston ring forming a closed ring.6. A piston device according to claim 1 , wherein the supplementary gasket element has a projection that protrudes radially outwards and forms a sealing edge for the supplementary gasket element to abut against the piston receptacle.7. A piston device according to claim 1 , wherein the supplementary gasket element is received in a ring-shaped groove claim 1 , wherein the groove is preferably ...

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Номер записи: 48
06-04-2017 дата публикации

Fuel pump

Номер: US20170096988A1
Автор: Hirokazu Yokoyama, Kazuhiro Asayama, Satoki TAKAGI
Принадлежит: Toyota Motor Corp

A fuel pump includes a plunger that reciprocates in a cylinder. The fuel pump further includes a first mover connected to the plunger, a second mover serving as a counterweight for the first mover, an electromagnet provided between the first mover and the second mover, a first magnetic member provided between the first mover and the second mover, and a first spring urging the first mover and the second mover away from each other. Further, a second magnetic member is provided between both of the electromagnet and the first magnetic member and a first inclined surface of the first mover, while a third magnetic member is provided between both of the electromagnet and the first magnetic member and a second inclined surface of the second mover.

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Номер записи: 49
14-04-2016 дата публикации

SYSTEM AND METHOD FOR LUBRICATING A FUEL PUMP

Номер: US20160102642A1
Автор: Basmaji Joseph, Bidner David Karl, Elie Larry Dean, Pursifull Ross Dykstra, Soltis Richard E., Surnilla Gopichandra
Принадлежит:

Systems and methods for diagnosing and operating an engine with a fuel pump that supplies fuel to a fuel injector that may be temporarily deactivated are described. In one example, injection of fuel may commence in response to a level of lubrication of a fuel pump. The system and methods may extend fuel pump life in systems where fuel injection may be deactivated. 1. A method for operating a pump in a system , comprising:solely mechanically driving a movable structural component of the pump for supplying a fluid;displacing the fluid from the pump from a stationary structural component of the fuel pump housing the movable structural component;diagnosing operation of the pump in response to an electrical property between the movable structural component and the stationary structural component via measurement of the electrical property by a controller; andadjusting an actuator of the system in response to the diagnosed operation.2. The method of claim 1 , where the pump is driven via an engine camshaft or crankshaft.3. The method of claim 1 , where the electrical property is a resistance.4. The method of claim 1 , wherein the electrical property is a capacitance.5. The method of claim 1 , where the movable structural component is a piston or an impeller.6. The method of claim 1 , where the stationary structural component is a cylinder wall or a pump housing.7. The method of claim 1 , further comprising providing an electric insulator between the movable structural component and the stationary structural component and indicating pump degradation in response to an electrical resistance of the pump less than a threshold value.8. The method of claim 1 , further comprising adjusting fluid flow through the pump in response to an electrical resistance of the pump less than a threshold value.9. A method for operating a fuel pump claim 1 , comprising:reducing flow through the fuel pump in response to an engine operating condition; andincreasing flow through the fuel pump via ...

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Номер записи: 50
26-03-2020 дата публикации

TAPPET

Номер: US20200095901A1
Автор: Backert Georg, Dotterweich Michael, Fichtner Alexander, Geyer Norbert, Reichel Matthias
Принадлежит: SCHAEFFLER TECHNOLOGIES AG & CO. KG

A tappet is proposed, for a fuel pump or for a valve timing gear, in each case of an internal combustion engine, comprising a hollow-cylindrical housing, which includes two separate portions lying in line one after the other, which are fitted together in a region of their facing inner faces and are permanently connected to one another by way of a joint. The tappet has a roller on its driving side and an abutment for a follower part on its driven side, which abutment is formed on a separate insert. The abutment is radially supported on the housing in the fitted-together region of the two portions, wherein the insert has a middle annular collar, from which on the one hand a sleeve portion protrudes in the direction of the driving side and on the other hand a dome-like attachment protrudes towards the driven side. 1. A tappet for a fuel pump or for a valve timing gear , in each case of an internal combustion engine , the tappet comprising:a hollow cylindrical housing having two separate portions which lie successively in alignment, the two portions joined together in a joined region of their facing inner faces and permanently connected together via a joint;a roller on a drive side of the cylindrical housing; a first side from which a sleeve portion protrudes in a direction of the drive side; and', 'a second side from which a dome-like attachment protrudes towards the output side;', radially supported at the joined region of the two portions by an outer ring of the annular collar; and', 'axially supported by an outer face of the sleeve portion that rests on at least one radial indentation of a drive-side portion of the two portion; and, 'wherein the insert is, 'an end face of the dome-like attachment has the abutment configured to engage the follower part., 'a central annular collar including, 'an abutment configured for a follower part on an output side of the cylindrical housing, the abutment formed on a separate insert that is radially supported on the cylindrical ...

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Номер записи: 51
21-04-2016 дата публикации

High pressure pump for a fuel injection system

Номер: US20160108875A1
Автор: Friedrich Boecking, Marco Lamm
Принадлежит: ROBERT BOSCH GMBH

The invention relates to a high pressure pump for a fuel injection system, in particular a common rail injection system, comprising a housing part ( 1 ) with a bore ( 2 ), in which a pump piston ( 3 ) is received such that it can be moved with a reciprocating movement, which pump piston ( 3 ) is supported via a tappet assembly ( 4 ) on a cam ( 5 ) or eccentric and delimits a pump working chamber ( 6 ) in the axial direction, which pump working chamber ( 6 ) can be filled with fuel via an upstroke valve ( 7 ) which is integrated into the high pressure pump. According to the invention, a feed bore ( 8 ) is configured in the housing part ( 1 ) in order to supply the upstroke valve ( 7 ) with fuel, which feed bore ( 8 ) is connected to a bore ( 11 ) of a further housing part ( 12 ), which bore ( 11 ) connects a pump interior chamber ( 9 ) and a tappet chamber ( 10 ).

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Номер записи: 52
05-05-2016 дата публикации

METHOD AND APPARATUS FOR OPERATING AN EC-FUEL PUMP

Номер: US20160123267A1
Автор: KAHLERT Andreas
Принадлежит:

A method for operating an electronically commutated fuel pump with an upstream fuel pump electronics unit of a motor vehicle, wherein the fuel pump is operated at a predefined speed, the method includes detecting a speed irregularity of the electronically commutated fuel pump, the speed irregularity being determined by examining the synchronicity between rotary field and rotor of the fuel pump, and switching over the speed of the electronically commutated fuel pump to a higher speed value than the predefined speed until a stable operation of the fuel pump without loss of synchronicity between rotary field and rotor of the fuel pump is achieved, the switchover of the fuel pump to the higher speed is performed by a predefined speed jump or is performed at predefined speed steps, the speed being increased until stable operation of the fuel pump is achieved. 1. A method for operating an electronically commutated fuel pump with an upstream fuel pump electronics unit of a motor vehicle , the fuel pump being operated at a predefined speed , the method comprising:detecting a speed irregularity of the electronically commutated fuel pump, the speed irregularity being determined by examining the synchronicity between rotary field and rotor of the fuel pump; andswitching over the speed of the electronically commutated fuel pump to a higher speed value than the predefined speed until a stable operation of the fuel pump without loss of synchronicity between rotary field and rotor of the fuel pump is achieved, the switchover of the fuel pump to the higher speed being performed in one step by a predefined speed jump or being performed at predefined speed steps, the speed being increased until stable operation of the fuel pump is achieved.2. The method of claim 1 , wherein the speed of the fuel pump is lowered again after a predefined time once a speed value for stable operation has been reached.3. The method of claim 1 , wherein the fuel pump is operated again at the predefined ...

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Номер записи: 53
05-05-2016 дата публикации

MULTIPLE STAGE FUEL PUMP

Номер: US20160123288A1
Автор: CHOI Won Young, Sohn In Seok, YU Gyu Sang
Принадлежит:

A multi-stage fuel pump includes a casing having a fuel intake formed on one side thereof and a fuel discharge port formed on the other side thereof, and a plurality of impellers provided within the casing, having a plurality of blades disposed on a circumferential surface in an outward direction of the circumferential surface and having blade chambers formed between the blades and penetrating through upper and lower surfaces of the impellers to allow fuel to be discharged and introduced to and from upper and lower sides of the blades, and formed in multiple stages, wherein fuel intaken through the fuel intake according to rotation of the impellers is discharged to the fuel discharge port through the blade chambers of the impellers, and the numbers of the blades of each of the impellers are different, thereby reducing blade passage frequency (BPF) noise generated according to rotation of the impellers. 1. A multi-stage fuel pump comprising:a casing having a fuel intake formed on one side thereof and a fuel discharge port formed on the other side thereof; anda plurality of impellers provided within the casing, having a plurality of blades disposed on a circumferential surface in an outward direction of the circumferential surface and having blade chambers formed between the blades and penetrating through upper and lower surfaces of the impellers to allow fuel to be discharged and introduced to and from upper and lower sides of the blades, and formed in multiple stages,wherein a flow channel is formed such that fuel intaken through the fuel intake according to rotation of the impellers is discharged to the fuel discharge port through the blade chambers of the impellers, andthe numbers of the blades of each of the impellers are different.2. The multi-stage fuel pump of claim 1 , wherein the impellers are formed to have different outer diameters and have different numbers of blades claim 1 , or are formed to have the same outer diameter and have different numbers of ...

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Номер записи: 54
21-05-2015 дата публикации

Camshaft and follower geometry

Номер: US20150136051A1
Автор: Timothy W. Kunz
Принадлежит: Delphi Technologies Inc

An internal combustion engine includes a camshaft with a lobe rotatable about a camshaft axis and a follower and which follows the lobe and is reciprocated along a follower axis by the lobe. A contact force is generated between the lobe and the follower such that the contact force is cyclic between a minimum contact force and a maximum contact force. The follower axis is offset from the camshaft axis such that the lobe contacts the follower at a contact point that is substantially aligned with the follower axis when the maximum contact force is generated between the lobe and the follower. In this way, the side load on the follower is minimized.

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Номер записи: 55
10-05-2018 дата публикации

Fuel Supply Device and Fuel Supply Method

Номер: US20180128225A1
Автор: Makoto Kounosu, Renzo KANDA, Seiichi Kitamura
Принадлежит: Mitsui Engineering and Shipbuilding Co Ltd

A fuel supply device includes: a linear actuator; a reciprocating pump having a boosting piston driven by the linear actuator and configured to reciprocate in an axial direction, the reciprocating pump being configured to suck the fuel when the boosting piston moves in a first direction and configured to boost and eject the fuel when the boosting piston moves in a second direction; and a controller configured to control driving of the linear actuator so as to adjust an amount of the fuel ejected from a boosting cylinder per reciprocating time by adjusting a ratio of a fuel ejection time and a fuel suction time of the reciprocating pump without changing the reciprocating time of the boosting piston in accordance with a load of the internal combustion engine. The adjustment adjusts a stroke length of the boosting piston and a moving speed of the boosting piston in the second direction.

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Номер записи: 56
10-05-2018 дата публикации

AN OIL LUBRICATED COMMON RAIL DIESEL PUMP

Номер: US20180128226A1
Автор: Krause Richard, Laity Kevin J., Thornthwaite Ian Roy
Принадлежит:

An oil lubricated common rail diesel pump includes a pumping assembly and a drivetrain assembly. The pumping assembly includes a pump housing and a plunger mounted along a pumping axis. The drivetrain assembly includes a driveshaft and a cam mounted within a first chamber of a drivetrain housing. The plunger is arranged for reciprocating linear movement along the pumping axis within a second chamber of the housing upon rotation of the cam. The drivetrain assembly also includes a guide mounted within the housing between the cam and the plunger and being adapted to receive a cam follower. At least the housing is adapted to be substantially filled with oil in use and the guide includes at least one flow passage communicating between the first chamber and the second chamber. 115-. (canceled)16. An oil lubricated common rail diesel pump comprising:a pumping assembly; anda drivetrain assembly; a pump housing; and', 'a plunger mounted along a pumping axis;', 'the drivetrain assembly comprising:, 'the pumping assembly comprising a drivetrain housing having a first chamber and a second chamber;', 'a cam mounted within the first chamber, the plunger being arranged for reciprocating linear movement along the pumping axis within the second chamber upon rotation of the cam; and', 'a guide mounted within the drivetrain housing between the cam and the plunger and being adapted to receive a cam follower; wherein at least the drivetrain housing is adapted to be substantially filled with oil in use and the guide comprises at least one flow passage communicating between the first chamber and the second chamber of the drivetrain housing, wherein the drivetrain housing comprises an oil inlet adapted to deliver oil to the first chamber of the drivetrain housing in a region of the cam., 'a driveshaft;'}17. The oil lubricated common rail diesel pump according to claim 16 , wherein the guide comprises a guide body comprising first and second ends and the at least one flow passage extends ...

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Номер записи: 57
11-05-2017 дата публикации

CAM FOLLOWER ROLLER DEVICE WITH INSERT

Номер: US20170130616A1
Автор: Hauvespre Benoît, Perrotin Thomas, Viault Samuel
Принадлежит: AKTIEBOLAGET SKF

The cam follower roller device provides a tappet body an insert mounted in the tappet body and provided with a central core and with at least two side tabs a pin mounted at least on the tabs of the insert, and a roller mounted on the pin. The insert further provides at least one stiffener disposed between the core and each tab 1. A cam follower roller device comprising:a tappet body,an insert mounted in the tappet body and provided with a central core and with at least two side tabs,a pin mounted at least on the tabs of the insert,a roller mounted on the pin, andat least one stiffener disposed between the core and each tab.244242628. The device according to claim 1 , wherein each stiffener () extends at least along a part of the junction between the core () and an associated tab ( claim 1 , ) of the spacer.3242628. The device according to claim 2 , wherein each stiffener further extends both on the core () and on the associated tab ( claim 2 , ) of the spacer.4. The device according to claim 1 , wherein each stiffener extends towards the roller.5. The device according to claim 1 , wherein the insert and the stiffeners are made in one part.64446. The device according to claim 1 , wherein Device according to any of the preceding claims claim 1 , wherein each stiffener ( claim 1 , ) is made by local plastic deformation of the insert.7. The device according to claim 1 , wherein the insert is made of stamped metal sheet.8. The device according to claim 1 , wherein each stiffener comprises a rib.9. The device according to claim 1 , wherein each tab of the insert comprises a receiving housing into which an end of the pin is mounted.10. The device according to claim 9 , wherein the tappet body comprises axial blocking means for maintaining the pin into the receiving housings.11. The device according to claim 1 , wherein the tappet body further comprises at least one retaining means cooperating with the insert for axially retaining the insert relative to the tappet body.12. ...

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Номер записи: 58
21-05-2015 дата публикации

HIGH-PRESSURE PUMP

Номер: US20150139825A1
Автор: KUROYANAGI Masatoshi, Matsunaga Yasuaki, Urushizaki Mamoru
Принадлежит:

During a pressurization stroke of a high-pressure pump, a cylinder inner wall and a plunger receive a fuel pressure from the pressurization chamber. Meanwhile, an upper housing does not receive the fuel pressure from the pressurization chamber, so that its thickness can be made thin. A cylinder is comprised of a bottom portion, a cylindrical portion and a large-diameter cylindrical portion. When inserting the large-diameter cylindrical portion into a large engaging hole, the bottom portion and the cylindrical portion are not brought into contact with a lower housing. A high liquid-tightness between the bottom portion, the cylindrical portion and a small engaging hole can be ensured. 1. A high-pressure pump comprising:a plunger performing a reciprocating movement;a cylinder having a cylinder inner wall on which the plunger reciprocatably slides;a pressurization chamber defined between the cylinder inner wall and a top surface of the plunger;the cylinder having a suction port and a discharge port which communicate with the pressurization chamber;a housing having a suction passage which communicates with the suction port and a discharge passage which communicates with the discharge port;a cup-shaped cover having a first through-hole confronting the suction passage and a second through-hole confronting the discharge passage; the cup-shaped cover accommodating the housing and defining a fuel gallery into which a fuel flows;a fuel suction portion disposed in the suction passage in such a manner as to extend through the first through-hole so that the fuel flowing into the pressurization chamber passes; anda fuel discharge portion disposed in the discharge passage in such a manner as to extend through the second through-hole so that the fuel discharged from the pressurization chamber passes.2. A high-pressure pump according to claim 1 , whereinthe first through-hole of the cup-shaped cover and the fuel suction portion are connected by welding, and the second through-hole of ...

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Номер записи: 59
01-09-2022 дата публикации

ROLLER TAPPET FOR A HIGH-PRESSURE FUEL PUMP

Номер: US20220275778A1
Автор: Geyer Norbert, Junker Marco
Принадлежит: SCHAEFFLER TECHNOLOGIES AG & CO. KG

The disclosure relates to a roller tappet for a high-pressure fuel pump. The roller tappet includes a housing that accommodates a cam contact roller next to a drive-side annular face of the housing. A bridge piece sits on an inner lateral surface of the housing, after the cam contact roller, as viewed from the drive-side annular face. An outer end face of the bridge piece has a rest for a pump piston. A separate adapter bolt protrudes from the rest beyond the output-side annular face of the housing; an end face of the adapter bolt, remote from the bridge piece, serves as a direct rest for the pump piston. An annular disc sits next to the output-side annular face of the housing, and the bore of said annular disc surrounds and retains the adapter bolt. 1. A roller tappet for a high-pressure fuel pump , the roller tappet comprising: a cam contact roller arranged on a drive-side of the housing,', 'a bridge arranged: i) on an inner lateral surface of the housing, and ii) between the cam contact roller and an output-side annular face of the housing, the bridge piece having a rest configured for actuating a pump piston,, 'a housing havinga separate annular disc arranged on an output-side of the housing,a separate adapter bold extending from the rest beyond the output-side annular face of the housing, and an end face of the adapter bold, remote from the bridge piece, is configured as a direct rest for a pump piston, anda bore of the annular disc surrounds and retains the adapter bolt.2. The roller tappet of claim 1 , wherein the bore of the annular disc is integrally formed with an annular collar claim 1 , the annular collar protruding axially from the annular disc and retaining the adapter bolt with a press fit.3. The roller tappet of claim 1 , wherein the bore of the annular disc is integrally formed with an annular collar claim 1 , the annular collar protruding axially from the annular disc claim 1 , and the adapter bolt includes a ring extension having a ring step ...

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Номер записи: 60
19-05-2016 дата публикации

MECHANICAL SYSTEM FORMING A CAM FOLLOWER OR A ROCKER ARM

Номер: US20160138541A1
Автор: Hauvespre Benoît, Viault Samuel
Принадлежит: AKTIEBOLAGET SKF

A mechanical system that forms one of a cam follower or a rocker arm. The mechanical system comprises a support element including a first body portion and a second body portion, a pin extending between two opposite ends along a first axis and supported by the first body portion of the support element, and a roller mounted on pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam. The mechanical system further comprises a spacing element comprising a first body portion connected to the second body part of the support element and a second body portion adapted to be supported by a movable support. 1. A mechanical system , forming one of a cam follower or a rocker arm , the mechanical system comprising:a support element comprising a first body part and a second body part;a pin extending between two opposite ends along a first axis and supported by the first body part of the support element;a roller mounted on pin, movable in rotation relative to the pin around the first axis and adapted to roll on a cam; anda spacing element comprising a first body portion connected to the second body part of the support element and a second body portion adapted to be supported by a movable support.2. The mechanical system according to claim 1 , the second body part of the support element further comprises a cavity claim 1 ,wherein the first body portion of the spacing element is inserted and connected to the cavity.3. The mechanical system according to claim 2 , wherein the spacing element is press-fitted within the cavity of the support element.4. The mechanical system according to claim 1 , the first body portion of the spacing element further comprises at least two lateral flanges that perpendicularly extend from the second body portion of the spacing element.5. The mechanical system according to claim 4 , wherein the spacing element has a U-shape.6. The mechanical system according to claim 1 , the first body portion of the spacing element ...

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Номер записи: 61
17-05-2018 дата публикации

Pinless tappet in a common rail high pressure fuel pump

Номер: US20180135578A1
Автор: Anthony A. Shaull
Принадлежит: Cummins Inc

A system for preventing rotation of a tappet includes a tappet having an outer casing and a central axis which is configured to reciprocate linearly along the central axis. The outer casing includes a flat portion having a length along the central axis and having a width. Additionally, the system includes a lock bar fixed in position relative to the linear oscillation of the outer casing. The lock bar is positioned in proximity to the flat portion of the outer casing. Upon rotation of the outer casing about the central axis, the lock bar is configured to come into contact with the cuter casing and inhibit additional rotation of the outer casing.

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Номер записи: 62
17-05-2018 дата публикации

High-pressure pump

Номер: US20180135580A1
Автор: Noriya Matsumoto, Tatsuro Koga
Принадлежит: Denso Corp

In a high-pressure pump, a relief valve seat surrounds an opening of a relief valve passage of a valve seat main body in a first space. A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve member is provided in the first space so as to be reciprocable in an axial direction. A relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction.

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Номер записи: 63
17-05-2018 дата публикации

High-Pressure Fuel Pump and Method for Producing Same

Номер: US20180135581A1
Автор: HASHIDA Minoru, HOHKITA Atsushi, SAITO Atsuji, SASO Yuta, Suganami Masayuki, TOKUMARU Kazuaki, Tokuo Kenichiro, Usui Satoshi, YAGAI Masamichi
Принадлежит:

Provide is a high-pressure fuel pump capable of improving the degree of freedom of layout of members to be attached to a pump body and a producing method thereof. Therefore, the high-pressure fuel pump includes the suction joint that sucks fuel, the pump body formed with the pressurizing chamber that pressurizes the fuel sucked from the suction joint, and the discharge joint that discharges the fuel pressurized in the pressurizing chamber. The pump body is formed so that at least a part of the side surface portion thereof becomes a cylindrical portion or a polygonal shape portion. At least one of the discharge joint and the suction joint may be fixed on the inner peripheral side with respect to the outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion. 1. A high-pressure fuel pump comprising:a suction joint that sucks fuel;a pump body formed with a pressurizing chamber that pressurizes the fuel sucked from the suction joint; anda discharge joint that discharges the fuel pressurized in the pressurizing chamber,wherein the pump body is formed such that at least a part of a side surface portion is a cylindrical portion or a polygonal shape portion, and at least one of the discharge joint and the suction joint is fixed on an inner peripheral side with respect to an outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion.2. A high-pressure fuel pump comprising:a suction joint that sucks fuel;a pump body formed with a pressurizing chamber that pressurizes the fuel sucked from the suction joint;a discharge joint that discharges the fuel pressurized in the pressurizing chamber; andan electromagnetic suction valve mechanism,wherein the pump body is formed such that at least a part of a side surface portion is a cylindrical portion or a polygonal shape portion, and at least one of the discharge joint, the suction joint, and the electromagnetic suction valve ...

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Номер записи: 64
09-05-2019 дата публикации

Pump for Supplying High-Pressure Fuel

Номер: US20190136841A1
Автор: Aritomi Shunsuke, TAMURA Shingo, TOKUO Kenichirou, Usui Satoshi
Принадлежит:

A pump for supplying high-pressure includes a plunger, a cylinder, a body, and a holder. The uppermost end surface of the cylinder is an end of the cylinder that is closest to the pressurizing chamber. A first gap formed between the outer periphery of the cylinder and the body in the radial direction is smaller than a second gap formed in the radial direction between the inner diameter of the pressurizing chamber and the outer diameter of the plunger. A radial gap is formed in an entire area of the cylinder in an axial direction thereof. 1. A pump for supplying high-pressure fuel comprising:a plunger which pressurizes fuel in a pressurizing chamber;a cylinder which guides the reciprocating movement of the plunger on an inner peripheral side face of the cylinder;a body in which the cylinder is arranged; anda holder that is disposed between the cylinder and the body,whereinthe cylinder has an end face that is pressed against the body and which opposes the body, and wherein the entire cylinder is disposed on the side opposite to the pressurizing chamber relative to the end face,an uppermost end surface of the cylinder is the only surface of the cylinder that directly contacts the body of the pump, a radially outwardmost side of the cylinder directly contacts the holder at a given region,along a longitudinal direction of a low fuel-pressure portion of the pump, the given region is located in an upper half of the low fuel-pressure portion, andthe uppermost end surface of the cylinder is an end of the cylinder that is closest to the pressurizing chamber,a first gap formed between the outer periphery of the cylinder and the body in the radial direction is smaller than a second gap formed in the radial direction between the inner diameter of the pressurizing chamber and the outer diameter of the plunger,a radial gap is formed in an entire area of the cylinder in an axial direction thereof, andthe first gap is smaller than the second gap.2. A pump for supplying high-pressure ...

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Номер записи: 65
26-05-2016 дата публикации

INTERNAL COMBUSTION ENGINE FUEL, PREFERABLY DIESEL FUEL, FEED PUMP ASSEMBLY

Номер: US20160146170A1
Автор: Damiani Fabio, Guarino Rocco, Tavani Manuel
Принадлежит:

Internal combustion engine fuel, preferably diesel fuel, feed pump assembly, the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body (), at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder (), which is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal (). 1126221226186122526212252125264525462625485226. An internal combustion engine fuel , feed pump assembly , the pump assembly () comprising a pump body (); at least one cylinder () formed in the pump body () and extending along an axis (A); a seat () formed in the pump body () , at one end of the cylinder (); an intake valve () for selectively controlling fuel feed into the cylinder () , wherein the intake valve is housed inside the seat () and in turn comprises a valve body (); and an annular seal () extending around the axis (A) and fitted inside the seat () between the valve body () and the pump body (); the pump assembly () being characterized in that the valve body () is positioned contacting the annular seal () along a contact surface () of the valve body () and close to a surface portion adjacent to a radially inner peripheral edge () of the seal (); the valve body () having an annular step () along another surface portion adjacent to a radially outer peripheral edge () of the seal ().248502626. A fuel feed pump assembly ...

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Номер записи: 66
26-05-2016 дата публикации

PLUNGER APPARATUS FOR HIGH PRESSURE PUMP

Номер: US20160146204A1
Автор: HAN Jung Hwan
Принадлежит:

A plunger apparatus for a high pressure pump includes a plunger having a quadrangular cross section and reciprocating in an internal passage provided in a housing to deliver a low pressure fluid to a compression chamber. A guide is connected to the plunger to guide the plunger when the plunger reciprocates. 1. A plunger apparatus for a high pressure pump , comprising:a plunger having a quadrangular cross section and reciprocating in an internal passage provided in a housing to deliver a low pressure fluid to a compression chamber; anda guide connected to the plunger to guide the plunger when the plunger reciprocates.2. The plunger apparatus of claim 1 , wherein the plunger has a square pillar shape.3. The plunger apparatus of claim 1 , wherein an inner peripheral surface of the internal passage has a circular shape claim 1 , the plunger has rounded corners which correspond to the inner peripheral surface of the internal passage.4. The plunger apparatus of claim 1 , wherein the plunger has a through hole at the center thereof in a reciprocating direction claim 1 , and the guide penetrates through the through hole to guide the plunger when the plunger reciprocates linearly.5. The plunger apparatus of claim 1 , wherein a space is formed between an outer peripheral surface of the plunger and the internal passage and the fluid moves through the space part.6. The plunger apparatus of claim 1 , wherein the plunger reciprocates in the internal passage of the housing by a magnetic field of a solenoid and opens and closes a valve to deliver the low pressure fuel to the compression chamber. The present application claims the benefit of priority to Korean Patent Application No. 10-2014-0165150, filed Nov. 25, 2014, the entire contents of which is incorporated herein for all purposes by this reference.The present disclosure relates to a plunger apparatus for a high pressure pump, and more particularly, to a plunger apparatus for a high pressure pump capable of preventing a ...

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Номер записи: 67
04-06-2015 дата публикации

TAPPET

Номер: US20150152826A1
Автор: Dorn Stefan, Geyer Norbert
Принадлежит: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG

A tappet () for a high-pressure fuel pump of an internal combustion engine is provided, having a tube-like housing (), in the case of the drive-side annular face () of which two flat sections () are indented from an outer lateral surface () of the housing () lying diametrically opposite one another, in which flats a pin () is mounted which supports a roller (), wherein, axially below the roller (), an inner lateral surface () of the housing () is penetrated by a separate bridge piece (), a driven-side end face () of which acts as a rest for a tappet follower part and which bears axially firstly in the direction of the drive-side annular face () against undersides () of the flat sections () and secondly in the direction of an output-side annular face () of the housing () by way of a securing ring () which is fixed on the inner shell (), wherein the bridge piece () is held by the securing ring () such that it is clamped axially and radially without play in the housing (). 1. A tappet for a pump or a compressor , comprising a tube-shaped housing , with two flat sections indented from an outer lateral surface of the housing lying diametrically opposite each other in a drive-side annular end face of said housing , a pin carrying a roller is supported in the flat sections , a separate bridge piece passes through an inner lateral surface of the housing , axially underneath the roller , a driven-side end face of the bridge piece acts as a contact surface for a tappet follower part and is contacted axially on one side in a direction toward the drive-side annular end face on bottom sides of the flat sections and also , on the other side , in a direction toward a driven-side annular end face of the housing by a securing ring fixed on the inner lateral surface , the bridge piece is held clamped in the housing by the securing ring without play in axial and radial directions.2. The tappet according to claim 1 , wherein the bridge piece is clamped between a top side of the ...

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Номер записи: 68
25-05-2017 дата публикации

Cam follower roller device with spacer

Номер: US20170145867A1
Автор: Benoît Hauvespre, Samuel Viault, Thomas Perrotin
Принадлежит: SKF AB

The cam follower roller device provides a tappet body extending along an axis, an insert mounted in the tappet body, a pin mounted at least on the insert and a roller mounted on the pin. The device further provides a spacer having a body mounted axially against the insert and with retaining means, cooperating with the insert for fixing the spacer to the insert.

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Номер записи: 69
25-05-2017 дата публикации

Cam follower roller device with lubricant supply holes and lubricating method

Номер: US20170145877A1
Автор: Arnault Benoit, Berruet Nicolas, Hauvespre Benoît, Jouanno Guillaume, Viault Samuel
Принадлежит: AKTIEBOLAGET SKF

The cam follower roller device provides a tappet body, a pin mounted into the tappet body, and a roller mounted on the pin and provided with an outer surface and with end faces, axially delimiting the outer surface. At least one lubricant supply through-hole is formed into the thickness of the tappet body and locally faces an edge of the roller delimited between the outer surface and one of the end faces. 1. A cam follower roller device comprising:a tappet body,a pin mounted into the tappet body, anda roller mounted on the pin and provided with an outer surface and with end faces axially delimiting the outer surface, whereinat least one lubricant supply through-hole is formed into the thickness of the tappet body and locally faces an edge of the roller delimited between the outer surface and one of the end faces.2. The device according to claim 1 , wherein an axis of the lubricant supply through-hole is oriented towards the edge of the roller.3. The device according to claim 1 , wherein the lubricant supply through-hole partly faces at least one of the outer surface of the roller and the end face of the roller.4. The device according to claim 1 , wherein the lubricant supply through-hole is spaced apart from an upper face of the tappet body.5. The device according to claim 1 , wherein the lubricant supply through-hole extends into a radial plane of the device perpendicular to an axis of the tappet body.6. The device according to claim 1 , wherein the lubricant supply through-hole is tilted with respect to a radial plane of the device perpendicular to an axis of the tappet body.7. The device according to claim 1 , wherein the tappet body provides at least first and second lubricant supply through-holes formed into the thickness of the tappet body claim 1 , the first lubricant supply through-hole locally facing the edge of the roller delimited between the outer surface and the end face claim 1 , the second lubricant supply through-hole locally facing another edge of ...

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Номер записи: 70
02-06-2016 дата публикации

METHOD FOR LIFT PUMP CONTROL

Номер: US20160153385A1
Автор: Pursifull Ross Dykstra
Принадлежит:

Methods and systems are provided for controlling a low pressure pump in port fuel direct injection (PFDI) engines. One method includes, when operating a high pressure pump in a default pressure mode, pulsing the low pressure pump when pressure in a high pressure fuel rail decreases below a threshold. The method further includes, when operating the high pressure pump in a variable pressure mode, pulsing the low pressure pump based on presence of fuel vapor at an inlet of the high pressure pump. 1. A method , comprising: 'pulsing a low pressure pump when pressure in a high pressure fuel rail decreases below a threshold; and', 'when operating a high pressure pump in a default pressure mode,'} 'pulsing the low pressure pump based on presence of fuel vapor at an inlet of the high pressure pump.', 'when operating the high pressure pump in a variable pressure mode,'}2. The method of claim 1 , wherein an electronically-controlled solenoid valve is deactivated when the high pressure pump is operated in default pressure mode.3. The method of claim 2 , wherein the electronically-controlled solenoid valve is activated when the high pressure pump is operated in variable pressure mode claim 2 , and wherein the pressure in the high pressure fuel rail is regulated via the electronically-controlled solenoid valve.4. The method of claim 1 , wherein pulsing the low pressure pump includes pulsing the low pressure pump at full voltage.5. The method of claim 1 , wherein pulsing the low pressure pump includes pulsing the low pressure pump for short durations.6. The method of claim 1 , further comprising claim 1 , when operating the high pressure pump in variable pressure mode claim 1 , not pulsing the low pressure pump when pressure in the high pressure fuel rail decreases below the threshold.7. The method of claim 1 , wherein when operating the high pressure pump in the variable pressure mode claim 1 , presence of fuel vapor at the inlet of the high pressure pump is determined when an ...

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Номер записи: 71
02-06-2016 дата публикации

HIGH-PRESSURE PUMP

Номер: US20160153413A1
Автор: Dohms Ralf
Принадлежит:

The invention relates to a high-pressure pump (), in particular for a motor vehicle, for pumping a fluid, in particular fuel, such as diesel, comprising: a drive shaft (), which is supported in such a way that the drive shaft can be rotated about an axis of rotation () and which has at least one cam (); at least two pistons (); at least two cylinders () for supporting the at least two pistons (); wherein the pistons () each have a piston longitudinal axis () and the piston longitudinal axes () are oriented at an angle to each other in a projection of the piston longitudinal axes () in the direction of the axis of rotation () of the drive shaft () onto a fictitious projection plane perpendicular to the axis of rotation (), wherein each of the at least two pistons () is supported on a shaft rolling surface () of the drive shaft () having the at least one cam () indirectly by means of a respective supporting element () having a supporting rolling surface (), such that a translational motion can be performed by the at least two pistons () as the result of a rotational motion of the drive shaft (), wherein the piston longitudinal axes () of the pistons () have an axial distance in the direction of the axis of rotation () of the drive shaft (). 11. A high-pressure pump () , comprising{'b': 2', '26', '3, 'a drive shaft () mounted rotatably about a rotation axis () and having at least one cam (),'}{'b': '5', 'at least two pistons (),'}{'b': 6', '5', '5', '16', '16', '26', '2', '26', '16, 'at least two cylinders () for mounting of the at least two pistons (), the pistons () each having a piston longitudinal axis (), wherein on a projection of the piston longitudinal axes () in the a direction of the rotation axis () of the drive shaft () onto a theoretical projection plane perpendicular to the rotation axis (), the piston longitudinal axes () are oriented at an angle to each other,'}{'b': 5', '14', '15', '4', '2', '3', '5', '2, 'wherein the at least two pistons () rest ...

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Номер записи: 72
17-06-2021 дата публикации

SUCTION VALVE FOR HIGH-PRESSURE FUEL PUMP

Номер: US20210180552A1
Автор: Han Kyung Chul, Hong Chun Ky, Kim Jin Sung, Park Hyeong Kyun
Принадлежит:

A suction valve of a high-pressure fuel pump for a vehicle includes a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion, and further includes a valve sleeve inserted into the valve installation space and formed with a flow hole, a valve spring seated on the valve sleeve, a valve plate elastically supported by the valve spring, and moving in conjunction with the rod, and a valve sheet formed with an introduction hole opened and closed by the valve plate, in which the valve sleeve is slid and inserted into the valve installation space, and the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve. 1. A suction valve of a high-pressure fuel pump , the suction valve comprising:a housing having an inlet through which a fuel is introduced and a pump chamber configured to press the fuel, a valve installation space arranged between the inlet and the pump chamber, and a solenoid part provided with a rod for performing a linear reciprocal motion;a valve sleeve inserted into the valve installation space and formed with a flow hole;a valve spring seated on the valve sleeve;a valve plate elastically supported by the valve spring, and moving in conjunction with the rod; anda valve sheet formed with an introduction hole opened and closed by the valve plate,wherein the valve sleeve is slid and inserted into the valve installation space, andwherein the valve sheet is fitted into and fastened to the valve installation space to support the valve sleeve to fix a location of the valve sleeve.2. The suction valve of claim 1 , wherein the valve sleeve comprises:a support part having a fixed location between a seating part formed to protrude inward from the valve installation space and the valve sheet;a guide part provided inside ...

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Номер записи: 73
11-06-2015 дата публикации

Tappet

Номер: US20150159610A1
Автор: Norbert Geyer, Stefan Dorn
Принадлежит: Schaeffler Technologies AG and Co KG

A plunger ( 1 ) for a high-pressure fuel pump is proposed, having a housing ( 2 ) which is similar to a tube and in the drive-side annular face ( 3 ) of which two flats ( 5 ) lie diametrically opposite one another which are indented from an outer shell ( 4 ) of the housing ( 2 ) and in which a pin ( 7 ) is mounted which supports a roller, wherein an inner shell ( 8 ) of the housing ( 2 ) is penetrated axially below the roller by a separate bridge piece ( 9 ), the lower face ( 10 ) of which acts as a rest for a pump piston in the case of an output-side annular face ( 11 ) of the housing ( 2 ), wherein the bridge piece ( 9 ) is fixed against rotation about an axial line of the housing ( 2 ) and is configured as a thick-walled longitudinal beam, with the result that an area ( 13 ) in the manner of a cylindrical segment remains between the longitudinal walls ( 12 ) of said longitudinal beam and the inner shell ( 8 ) of the housing ( 2 ), wherein, in order to fix the bridge piece ( 9 ) against rotation about the axial line of the housing ( 2 ), in the circumferential section of the inner shell ( 8 ) of the housing ( 2 ), in a first transverse wall ( 14 ) of the bridge piece ( 9 ), at least one projection ( 15 ) protrudes from one of the components ( 8, 14 ), which projection ( 15 ) is seated in a respectively complementary recess ( 16 ) of the respective other one of the components ( 14, 8 ).

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Номер записи: 74
08-06-2017 дата публикации

CAM FOLLOWER ROLLER DEVICE WITH REINFORCED TAPPET BODY

Номер: US20170159507A1
Автор: Corbett Richard, Hauvespre Benoît, Viault Samuel
Принадлежит: AKTIEBOLAGET SKF

The cam follower roller device provides a tappet housing extending along an axis, a pin mounted on the tappet housing and a roller mounted on the pin. The tappet housing includes a main body provided inside which the roller is mounted and with a recess delimited axially by a radial portion of the body. The tappet housing further provides at least one stiffening insert mounted in axial contact with the radial portion of the main body. 1. A cam follower roller device for a pump piston of a fuel injection pump comprising:a tappet housing extending along an axis,a pin mounted on the tappet housing, anda roller mounted on the pin, whereinthe tappet housing includes a main body provided with a recess inside which the roller is mounted and delimited axially by a radial portion of the body, and whereinthe tappet housing further includes at least one stiffening insert mounted in axial contact with the radial portion of the main body.2. The device according to claim 1 , wherein the main body of the tappet housing comprises a sleeve portion delimiting radially the recess claim 1 , the sleeve portion and the radial portion being made in one part.3. The device according to claim 1 , wherein the stiffening insert delimits an abutment surface for the pump piston that is oriented axially on the side opposite to the recess.4. The device according to claim 1 , wherein the stiffening insert is at least partly embedded in the thickness of the radial portion of the main body of the tappet housing.5. The device according to claim 1 , wherein the stiffening insert is entirely embedded in the thickness of the radial portion of the main body of the tappet housing claim 1 , the radial portion delimiting an abutment surface for the pump piston which is oriented axially on the side opposite to the recess.6. The device according to claim 1 , wherein the stiffening insert comprises at least a radial portion disposed at least in axial contact with the radial portion of the main body.7. The device ...

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Номер записи: 75
08-06-2017 дата публикации

High-Pressure Fuel Pump and Pressure Control Device

Номер: US20170159628A1
Автор: Joerg Bernhardt
Принадлежит: Continental Automotive GmbH

The present disclosure relates to a device for pressure control, including a rod and a plunger. The rod has a first end region delimiting a pressurized space and is movable along an axis between a top dead center and a bottom dead center. The plunger has a traverse substantially perpendicular to a plunger axis transmitting kinetic energy from a plunger drive to the rod in a contact region between a traverse surface and a second end region of the rod arranged opposite the first end region. The rod includes a calotte-shaped end region in the contact region of the rod and the traverse includes a calotte-shaped recess in the contact region of the traverse.

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Номер записи: 76
18-06-2015 дата публикации

Vane pump

Номер: US20150167608A1
Автор: Hiroyuki ISHIHAMA, Yoshiyuki INOSE
Принадлежит: Showa Corp

A vane pump includes: a rotor that is coupled with a rotation shaft to rotate; a plurality of vanes that are slidably held by a plurality of vane grooves which are disposed in a radiation direction in an outer circumferential portion of the rotor; a cam ring that is arranged to surround the rotor and the plurality of vanes; and a side plate that covers the cam ring and includes a supply unit which supplies a working fluid into the cam ring between the cam ring, an outer circumference of the side plate being recessed to a radially inner side of the rotation shaft to form the supply unit, in which an outer circumference of the supply unit and an inner circumference of the cam ring are shaped along each other.

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Номер записи: 77
16-06-2016 дата публикации

PULSATION DAMPER AND HIGH-PRESSURE FUEL PUMP

Номер: US20160169173A1
Автор: Yabuuchi Takeyuki
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A pulsation damper () includes a first diaphragm () and a second diaphragm () having a first pressure-receiving film portion () and a second pressure-receiving film portion () and defining a gas chamber () between the first pressure-receiving film portion () and the second pressure-receiving film portion () and an annular attachment member () configured to support the first diaphragm () and the second diaphragm (). Pressure receiving areas (A A) of the first pressure-receiving film portion () and the second pressure-receiving film portion () are different from each other. The annular attachment member () includes a large-diameter annular support portion () formed so as to surround the first pressure-receiving film portion () and to support the first diaphragm (); a small-diameter annular support portion () formed so as to surround the second pressure-receiving film portion () and to support the second diaphragm (); and an annular coupling portion () configured to couple the large-diameter annular support portion () with the small-diameter annular support portion () so as to close the gas chamber (). 1. A pulsation damper comprising:a first diaphragm including a first pressure-receiving film portion displaced upon receipt of a pressure;a second diaphragm including a second pressure-receiving film portion displaced upon receipt of a pressure, the second pressure-receiving film portion having a pressure receiving area different from a pressure receiving area of the first pressure-receiving film portion; andan annular attachment member configured to support the first diaphragm and the second diaphragm from outer peripheral sides of the first and the second pressure-receiving film portions,the annular attachment member includinga large-diameter annular support portion surrounding the first pressure-receiving film portion and supporting the first diaphragm,a small-diameter annular support portion surrounding the second pressure-receiving film portion and supporting the ...

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Номер записи: 78
15-06-2017 дата публикации

Manually Actuatable Feed Pump and Fuel System with a Feed Pump

Номер: US20170167458A1
Автор: Bannick Ulf, Deigendesch Tobias, Dietenberger Michael, Sabelberg Isgard
Принадлежит:

A manually actuated feed pump is provided with a primer bulb to be manually actuated by an operator. The primer bulb has a pump chamber. A travel-controlled valve connects the pump chamber to a fuel line. The travel-controlled valve has a valve member that is moved by an actuation travel of the primer bulb into an open position that opens the travel-controlled valve. A first spring is operatively connected to the valve member and to the primer bulb. The primer bulb acts through the first spring on the valve member. 1. A manually actuated feed pump comprising:a primer bulb configured to be manually actuated by an operator, wherein the primer bulb comprises a pump chamber;a travel-controlled valve connecting the pump chamber to a fuel line;wherein the travel-controlled valve comprises a valve member, wherein the valve member is moved by an actuation travel of the primer bulb into an open position that opens the travel-controlled valve;a first spring operatively connected to the valve member and to the primer bulb, wherein the primer bulb acts through the first spring on the valve member.2. The feed pump according to claim 1 , wherein the primer bulb acts immediately on the first spring.3. The feed pump according to claim 2 , wherein the first spring is secured against rotation relative to the primer bulb.4. The feed pump according to claim 1 , wherein the first spring in a non-actuated state of the primer bulb has a spacing relative to the primer bulb.5. The feed pump according to claim 1 , wherein the actuation travel of the primer bulb amounts to at least two times an actuation travel of the valve member for moving the valve member into the open position.6. The feed pump according to claim 1 , further comprising a second spring claim 1 , wherein the second spring is acting on the valve member in a closing direction of the travel-controlled valve.7. The feed pump according to claim 6 , wherein a spring constant of the second spring is greater than a spring constant ...

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Номер записи: 79
21-05-2020 дата публикации

INJECTING APPARATUS AND METHOD OF USING AN INJECTING APPARATUS

Номер: US20200158062A1
Автор: Kukler Ronald
Принадлежит:

An injecting apparatus for injecting a fluid under pressure into an associated chamber, the injecting apparatus including a body; a piston movable in the body under the action of fluid pressure in the associated chamber acting from externally against the piston, the piston being operable to compress fluid to be injected in a high pressure chamber, the piston being movable against the action of fluid pressure in a control chamber whereby movement of the piston is selectively controllable by controlling the fluid in the control chamber; and an injector valve and an associated injector orifice in selective fluid communication with the high pressure chamber whereby high pressure fluid from the high pressure chamber can be injected through the injector orifice upon opening of the injection valve. 144-. (canceled)45. An injector nozzle for injecting fuel into a combustion chamber of an internal combustion engine , the nozzle including a disc having a plurality of injector orifices situated around a periphery of the disc.46. An injector nozzle as defined in wherein a cross-section dimension of each orifice is less than 0.05 mm.47. An injector nozzle for injecting fuel into a combustion chamber on an internal combustion engine claim 45 , the nozzle including at least one injector orifice having a cross-section dimension of less than 0.025 mm.48. An injector nozzle as defined in claim 47 , there being at least fifty injector orifices.49. An injector nozzle as defined in claim 47 , in which a cross-section shape of each injector orifice is non-circular.50. An injector nozzle as defined in wherein the cross-section shape of each orifice has a generally flat portion.51. An injector nozzle as defined in in which the cross section shape of each orifice includes a generally U-shape portion or a generally V-shape portion.52. An injecting apparatus for injecting a fluid under pressure into an associated chamber claim 47 , the injecting apparatus including:a body,a piston movable in ...

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Номер записи: 80
25-06-2015 дата публикации

Cam follower roller device

Номер: US20150176690A1
Автор: Benoît Hauvespre, Gwenael Hingouet
Принадлежит: SKF AB

The cam follower roller device comprises a body, a shaft mounted on the body, and a roller mounted on the said shaft in a rotationally movable manner and comprising two end faces. Each of the said faces is arranged at least in part axially facing an inner wall of the body. At least one of the end faces of the roller and/or at least one of the said inner walls of the body comprise an antifriction and wear-resistant coating.

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Номер записи: 81
25-06-2015 дата публикации

Cam follower roller device

Номер: US20150176691A1
Автор: Aurelien Ghilbert-Simon, Benoît Hauvespre, Francois Champalou, Julien Maffucci, Richard Corbett
Принадлежит: SKF AB

The cam follower roller device including a body, a shaft mounted on the body, a roller mounted on the shaft in a rotationally movable manner, and at least one friction element mounted on the shaft axially between the roller and the body. The friction element is separate from the body and from the roller.

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Номер записи: 82
23-06-2016 дата публикации

Outboard motor fuel supply unit

Номер: US20160176491A1
Автор: Jun Ito
Принадлежит: Suzuki Motor Corp

A fuel supply unit includes a vapor separator that performs vapor-liquid separation for fuel pumped up by a low-pressure fuel pump; a fuel filter that filters the fuel subjected to vapor-liquid separation in the vapor separator; an in-line type high-pressure fuel pump that has an inlet port for receiving the fuel filtered by the fuel filter and pumping the fuel received from the inlet port from an outlet port, the inlet port being located under a fuel liquid level of the vapor separator; a fuel injector that injects the fuel pumped by the high-pressure fuel pump to the engine; and a fuel flow path connected from the vapor separator to the inlet port of the high-pressure fuel pump via a lower side of the inlet port of the high-pressure fuel pump, wherein the fuel filter is arranged in the lowermost part of the fuel flow path.

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Номер записи: 83
23-06-2016 дата публикации

Fuel unit pump and internal combustion engine comprising it

Номер: US20160177902A1
Автор: Richard Frank
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A fuel unit pump for an internal combustion engine, said fuel unit pump comprising a fuel unit pump body, a pumping plunger and a follower assembly for following the movement of a cam lobe of a camshaft of the internal combustion engine. The follower assembly may have a follower body connected to the pumping plunger and a roller rotatably mounted on a roller carrier and having a roller rotation axis, wherein said roller carrier is rotatably mounted on said follower body and having a roller carrier rotation axis.

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Номер записи: 84
06-06-2019 дата публикации

Cam follower roller device, notably for a fuel injection pump

Номер: US20190168306A1
Автор: CHAMBONNEAU Charles, Perrotin Thomas, Viault Samuel
Принадлежит:

A cam follower roller device comprising a tappet body extending along a longitudinal axis and defining a tappet bore, and a bearing assembly mounted in the tappet bore. The bearing assembly includes a pin centered on a pin transverse axis (the transverse axis is perpendicular to the longitudinal axis), and a roller rotatably mounted on the pin. The tappet body is made by a metal injection molding process including successive steps of mixing a metal powder with a thermoplastic binder, forming a part by injection of the mixed powder in a closed die, debinding the formed part in a furnace, sintering to densify the part, and quenching to set a tappet body hardness, to improve wear resistance and fatigue life. 1. A method of manufacturing a cam follower roller device , the method comprising steps of:obtaining a tappet body, the tappet body extending along a longitudinal axis, a tappet bore being formed along the longitudinal axis within the tappet body;mounting a bearing assembly within the tappet bore, the bearing assembly comprising a pin centered on a pin transverse axis being perpendicular to the longitudinal axis, and a roller rotatably mounted on the pin,fabricating the tappet body by a metal injection molding process including successive steps of:mixing a metal powder with a thermoplastic binder,forming a part by injection of the mixed powder in a closed die,debinding such a formed part in a furnace,sintering to densify the part, andquenching to set a tappet body hardness, to improve wear resistance and fatigue life.2. The method of manufacturing the cam follower roller device according to claim 1 , wherein the tappet body further comprises two transverse cylindrical through-holes transversally facing one another and receiving each an end of pin claim 1 , the through-holes being provided to longitudinal portions of tappet body and forming a support for the pin.3. The method of manufacturing the cam follower roller device according to claim 1 , wherein the device ...

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Номер записи: 85
21-06-2018 дата публикации

Common rail multi-cylinder fuel pump with independent pumping plunger extension

Номер: US20180171949A1
Автор: Anthony A. Shaull, Brian M. Watson, Lester L. Peters, Roberto M. Munoz
Принадлежит: Cummins Inc

A fuel pump for an internal combustion engine is provided comprising a barrel including a central bore having a longitudinal axis, a plunger disposed partially in the central bore and movable along the longitudinal axis, a spring retainer, a first coil spring having a proximal end in contact with a first section of the barrel and a distal end in contact with the spring retainer to urge the spring retainer into engagement with a tappet assembly, an extender element coupled to the plunger, and a second coil spring having a proximal end in contact with a second section of the barrel and a distal end in contact with the extender element to urge the plunger toward the spring retainer, wherein the extender element includes a counter-bore to couple the extender element to the plunger.

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Номер записи: 86
21-06-2018 дата публикации

High-Pressure Fuel Pump

Номер: US20180171950A1
Автор: SCHMIDBAUER Thomas
Принадлежит: Continental Automotive GmbH

The present disclosure relates to fuel systems. Some embodiments of the teachings may include a fuel pump comprising: a pump piston having a longitudinal centerline; a camshaft with at least one cam; a roller tappet arranged between the pump piston and the cam; and a tappet body and a roller rotatably held on the roller tappet. The pump piston and the tappet body may be movement-coupled with regard to movements in directions parallel to the piston longitudinal centerline. The roller may be in contact with the cam. The longitudinal centerline may intersect a geometric axis of rotation of the roller. The tappet body defines a tappet body longitudinal centerline parallel to the piston longitudinal centerline. The tappet body longitudinal centerline, in a projected view oriented parallel to the geometric axis of rotation of the roller, runs with a lateral spacing to the piston longitudinal center line. 1. A fuel pump comprising:a pump piston having a longitudinal centerline;a camshaft with at least one cam;a roller tappet arranged between the pump piston and the cam; anda tappet body and a roller rotatably held on the roller tappet;wherein the pump piston and the tappet body are movement-coupled with regard to movements in directions parallel to the piston longitudinal centerline;the roller is in contact with the cam;the longitudinal centerline intersects a geometric axis of rotation of the roller; andthe tappet body defines a tappet body longitudinal centerline parallel to the piston longitudinal centerline and the tappet body longitudinal centerline in a projected view oriented parallel to the geometric axis of rotation of the roller, runs with a lateral spacing to the piston longitudinal center line.2. The fuel pump as claimed in claim 1 , wherein claim 1 , at least at top dead center and at bottom dead center of the roller claim 1 , in the projected view claim 1 , a contact zone between the cam and the roller is laterally spaced apart from the tappet body ...

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Номер записи: 87
21-06-2018 дата публикации

High-Pressure Fuel Pump

Номер: US20180171952A1
Автор: Kulzer Stefan
Принадлежит: Continental Automotive GmbH

The present disclosure relates to high-pressure fuel pumps and the teaching may be applied to pumps in which a pump piston, by means of which a fuel is acted on with a high pressure, is guided in a guiding sleeve. In some embodiments, a high-pressure fuel pump may include: a housing having a housing recess; a pump piston for pressurizing a fuel; and a guiding sleeve arranged in the housing recess and guiding the pump piston. The guiding sleeve is connected to the housing recess with a materially engaging connection. 1. A high-pressure fuel pump comprising:a housing having a housing recess;a pump piston for pressurizing a fuel; anda guiding sleeve arranged in the housing recess and guiding the pump piston;wherein the guiding sleeve is connected to the housing recess with a materially engaging connection.2. The high-pressure fuel pump as claimed in claim 1 , wherein the materially engaging connection comprises an adhesive.3. The high-pressure fuel pump as claimed in claim 2 , wherein the adhesive is thermally stable up to a temperature of at least 180° C.4. The high-pressure fuel pump as claimed in claim 2 , wherein the adhesive is insoluble in fuels.5. The high-pressure fuel pump as claimed in claim 2 , wherein the guiding sleeve is arranged in an offset of the housing recess extending adjacent to a pressure chamber of the high-pressure fuel pump as far as a chamber at an end of the pump piston opposite the pressure chamber;wherein the offset includes an offset end face on which a guiding sleeve end face of the guiding sleeve is arranged;wherein the adhesive is disposed between the offset end face and the guiding sleeve end face.6. The high-pressure fuel pump as claimed in claim 5 , wherein the offset includes an offset side face on which a guiding sleeve side face is arranged; andwherein the adhesive is disposed between the offset side face and the guiding sleeve side face.7. The high-pressure fuel pump as claimed in claim 1 , wherein the materially engaging ...

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Номер записи: 88
06-06-2019 дата публикации

Partial Charging of Single Piston Fuel Pump

Номер: US20190170099A1
Автор: Lucas Robert G.
Принадлежит:

The valve assembly and associated pump, direct a magnetic flux path such that a carefully timed magnetic force is directly applied to an inlet valve member when a coil is energized. As a result, direct actuation of the inlet valve is achieved. This accommodates a new partial charge operating strategy that has a significant benefit to inlet pressure pulsations. The benefit of a partial charging strategy is reduced inlet pulsations and noise, especially during vehicle idle conditions when it is most objectionable. 1. A single piston fuel pump comprising: a pumping plunger reciprocally driven in a pumping chamber by a rotating cam , with the pumping chamber subject to intermittent charging of feed fuel by an inlet valve that is either directly coupled to a magnetic field or physically attached to an armature that is directly coupled to a magnetic field; and a control system responsive to the angular position of the cam , for controlling the inlet valve by altering the magnetic field to partially charge the pumping chamber before the plunger pressurizes the partially charged fuel while the pumping plunger driven along the nose of the cam.2. The pump of claim 1 , wherein the pumping chamber is partially charged while the pumping plunger is driven along the downslope of the nose and remains partially charged until the plunger pressurizes the partially charged fuel along the upslope of the nose of the cam.3. The pump of claim 1 , wherein the pumping chamber is partially charged while the pumping plunger is driven along the upslope of the nose of the cam and the pumping plunger pressurizes the partially charged fuel while further along the upslope of the nose of the cam.4. A fuel pump comprising a pump housing claim 1 , a fuel inlet connection on the housing for delivering feed fuel into an inlet flow path in the housing; a pumping chamber and associated pumping mechanism in the housing for receiving feed fuel from the inlet flow path through an inlet valve assembly claim 1 ...

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Номер записи: 89
30-06-2016 дата публикации

Roller Tappet

Номер: US20160186708A1
Автор: Ngoc-Tam Vu
Принадлежит: Continental Automotive GmbH

A roller tappet includes a roller and a roller shoe in which the roller is rotatably mounted. The roller shoe has a first lateral surface with a recess for receiving the roller, a second lateral surface opposite the first lateral surface, and a third lateral surface between the first and second lateral surfaces. The third lateral surface and at least part of the second lateral surface are each curved.

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Номер записи: 90
30-06-2016 дата публикации

ENERGY-STORING-TYPE HIGH-PRESSURE ELECTRIC FUEL PUMP, FUEL-SUPPLYING APPARATUS, AND APPLICATION METHOD THEREFOR

Номер: US20160186732A1
Автор: Liu Chengwen, Xi Daguang, Yang Yanxiang, Zhang Ping
Принадлежит: Zhejiang FAI Electronics Co., Ltd.

An energy-storing-type high-pressure electric fuel pump includes an electromagnetic driving apparatus and a plunger sleeve cylinder component. The plunger sleeve cylinder component includes a high-pressure volume, a plunger sleeve having a plunger hole, and a plunger capable of sliding within the plunger hole. A clearance volume of the plunger in the plunger hole is a high-pressure fuel chamber. A clearance volume between the electromagnetic driving apparatus and the plunger sleeve cylinder component forms a low-pressure fuel chamber. Under the action of the electromagnetic driving apparatus, the plunger sleeve cylinder component sucks a fuel in the low-pressure fuel chamber into the high-pressure fuel chamber and pressure-feeds the fuel into the high-pressure volume. The electromagnetic driving apparatus includes an energy storage apparatus, a movable part, and a still part. 1. An energy-storing high-pressure electronic fuel pump , comprising:an electromagnetic power device and a plunger sleeve assembly;wherein said plunger sleeve assembly comprises a high-pressure cavity, a plunger sleeve with a plunger hole therein, and a plunger that can slide in the plunger hole;a high-pressure fuel chamber formed in a space between the plunger and the plunger sleeve, and a low-pressure fuel chamber formed in a space between the electromagnetic power device and the plunger sleeve assembly;the electromagnetic power device controls the plunger sleeve assembly to transport fuel from the low-pressure fuel chamber to the high-pressure fuel chamber and to force the fuel to the high-pressure cavity;wherein said electromagnetic power device comprises:an energy-storing device, a moving element, and a stationary element;the electromagnetic power device is driven by a drive current to convert electric energy into an alternating bi-directional driving force to drive the moving element in reciprocating movement;in a first direction of the reciprocating movement, the energy-storing device ...

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Номер записи: 91
28-06-2018 дата публикации

PUMP ASSEMBLY AND A PROPULSION SYSTEM

Номер: US20180180005A1
Автор: DI NUNNO Davide, TRABUCCHI Luca
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A pump assembly and a propulsion system that utilizes the pump assembly includes a casing defining an opening. The pump assembly also includes a first member at least partially disposed in the opening. The first member is movable linearly relative to the opening. The pump assembly further includes a biasing member disposed in the opening. The biasing member is movable independently of the first member. The first member is movable in a first direction that applies a load to the biasing member which creates a torque on the biasing member. The pump assembly also includes a second member that separates the first member and the biasing member such that the torque on the biasing member is transferred to the second member without transferring the torque to the first member when the first member applies the load to the biasing member. 1. A pump assembly comprising:a casing defining an opening;a first member at least partially disposed in the opening and movable linearly relative to the opening;a biasing member disposed in the opening and movable independently of the first member, and wherein the first member is movable in a first direction that applies a load to the biasing member which creates a torque on the biasing member; anda second member that separates the first member and the biasing member such that the torque on the biasing member is transferred to the second member without transferring the torque to the first member when the first member applies the load to the biasing member.2. The assembly as set forth in wherein one of the casing and the first member define a groove claim 1 , and further including a protrusion fixed to one of the casing and the first member claim 1 , and wherein the protrusion is disposed in the groove to guide the first member linearly while minimizing rotation of the first member.3. The assembly as set forth in wherein the opening is disposed along a longitudinal axis and the casing defines the groove spaced from and substantially parallel ...

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Номер записи: 92
18-09-2014 дата публикации

Nitrided component surface repair

Номер: US20140272323A1
Автор: Huijun Wang, Marion B. Grant
Принадлежит: Caterpillar Inc

A plunger for fuel injection assembly is provided. The plunger includes a nitrided surface. The nitrided surface includes a damaged area. An electroless material is coated on the damaged area.

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Номер записи: 93
09-07-2015 дата публикации

TAPPET

Номер: US20150192098A1
Автор: Dorn Stefan, Geyer Norbert
Принадлежит: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG

A tappet () for a fuel injection pump, having a tube-like housing (), which accommodates a roller () for the running on a periodic lift generator inside the inner lateral surface () thereof in the region of a first ring end (). This roller has axle stumps () projecting from the end faces () of the roller, by which stumps the roller sits in recesses () in the housing (), wherein the housing () is penetrated axially by a bridge piece () underneath the roller (), the underside () of which bridge piece, which faces a second ring end () of the housing (), acts as a rest for a plunger following part. The inner lateral surface () of the housing (), proceeding from the first ring end thereof in the direction of the second ring end () and at least in the circumferential section () thereof, which surrounds an outer lateral surface () of the roller (), has a pocket-like thinned portion of material (), which levels out under a half of the height of the roller () and into which the ring edges () of the roller () project. 1. A tappet comprising , a tube-shaped housing having first and second annular end faces , a roller for a run-in of a periodic lift generator located in an area of the first annular end face within an inner lateral surface thereof , said roller has axle ends with one or more parts that project from end sides of the roller and by which the roller is seated in receptacles of the housing , a bridge piece passes through the housing axially below the roller , a lower side of said bridge piece faces the second annular end face of the housing acting at least indirectly as a contact surface for a tappet follower , the inner lateral surface of the housing has , starting from the first annular end face in a direction toward the second annular end face , as well as at least in a circumferential section thereof enclosing an outer lateral surface of the roller , a pocket-shaped reduction in material tapering slightly below half a height of the roller , with the roller ...

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Номер записи: 94
13-06-2019 дата публикации

Control device and control method for fuel pump

Номер: US20190178197A1
Автор: Seiji Okamura
Принадлежит: Toyota Motor Corp

A control device for a motor-driven fuel pump adapted for an internal combustion engine is provided. The fuel pump includes a cylinder, a mover in the cylinder, and an electric actuator configured to move the mover. The control device is configured to perform energization control on the electric actuator to reciprocate the mover so that the fuel pump draws in and discharges fuel. The control device is also configured to control a discharge count and a unit discharge amount based on an operating state of the internal combustion engine. The discharge count is a number of times of discharging fuel from the fuel pump to the fuel pipe during a period between a fuel injection from the fuel injection valve and the next fuel injection, and the unit discharge amount is an amount of fuel for one fuel discharge from the fuel pump.

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Номер записи: 95
13-06-2019 дата публикации

Control device for fuel pump and control method thereof

Номер: US20190178198A1
Автор: Seiji Okamura
Принадлежит: Toyota Motor Corp

A control device for an fuel pump includes an electronic control unit. The fuel pump is an electric fuel pump configured to supply fuel to a fuel pipe to which a fuel injection valve disposed within a cylinder of an engine is coupled. The electronic control unit executes an inter-injection discharge control of executing fuel discharge from the fuel pump at a predetermined timing between an Nth fuel injection and an (N+1)th fuel injection from the fuel injection valve. The electronic control unit changes a discharge ratio in accordance with an operational state of the internal combustion engine during the execution of the inter-injection discharge control. The discharge ratio is a ratio of the number of times of fuel discharge from the high-pressure fuel pump to the number of times of fuel injection from the fuel injection valve.

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Номер записи: 96
29-06-2017 дата публикации

FUEL PUMP

Номер: US20170184064A1
Автор: LEGE PEER CHRISTOPHER
Принадлежит: Audi AG

A fuel pump for conveying fuel includes a conveying unit having a cylinder, a plunger received in the cylinder, a pump spring received in the cylinder, an inner sleeve connected to the plunger, an outer sleeve in contact with the pump spring and in contact with a roller of a cam mechanism, and a locking bolt configured to detachably connect the inner and outer sleeves. 1. A fuel pump for conveying fuel , comprising a conveying unit including a cylinder , a plunger received in the cylinder , a pump spring received in the cylinder , an inner sleeve connected to the plunger , an outer sleeve in contact with the pump spring and in contact with a roller of a cam mechanism , and a locking bolt configured to detachably connect the inner and outer sleeves.2. The fuel pump of claim 1 , wherein the inner and outer sleeves are connected to one another in a base position of the locking bolt claim 1 , and the inner and outer sleeve are detached from one another in a rest position of the locking bolt.3. The fuel pump of claim 2 , further comprising a locking spring configured to bias the locking bolt in a direction of the base position claim 2 , said locking spring capable of being acted upon by engine oil under pressure such that the locking spring is pushed into the inner sleeve and the locking bolt is moved to the rest position claim 2 , when a force applied on the locking spring by the pressure of the engine oil exceeds a limit value to thereby cause a detachment between the inner and outer sleeves.4. The fuel pump of claim 1 , wherein the conveying unit is configured to deliver fuel only when the inner and outer sleeves are connected to one another claim 1 , and to interrupt delivery of fuel when the inner and outer sleeves are detached from one another.5. The fuel pump of claim 1 , wherein the piston moves in the cylinder at a delivery stroke claim 1 , a level of which is variable by the cam mechanism.6. An injection system for a combustion engine claim 1 , comprising:a ...

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Номер записи: 97
16-07-2015 дата публикации

Roller pin for cam actuated roller assembly

Номер: US20150198229A1
Автор: Adam C. Hill, David C. Mack, John W. Unes
Принадлежит: Caterpillar Inc

The present disclosure provides a roller pin for a fuel pump. The roller pin includes a cylindrical body made of a first material extending between a first end and a second end. The roller pin includes an intermediate portion disposed between the first end and the second end of the cylindrical body. The intermediate portion is formed by depositing a second material on the cylindrical body. The roller pin further includes a longitudinal groove extending along the intermediate portion.

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Номер записи: 98
05-07-2018 дата публикации

HIGH-PRESSURE PUMP

Номер: US20180187637A1
Автор: Matsumoto Teppei
Принадлежит:

In a high-pressure pump, a center of load in a virtual plane including an end face of a coil spring facing a pressurizing chamber in an axial direction is defined as an upper load center, and a center of load in a virtual plane including an end face of the coil spring facing a cam in the axial direction is defined as a lower load center. The coil spring is configured such that, when viewed in the axial direction, during motion of a plunger toward the pressurizing chamber by rotation of the cam, the upper load center moves in one direction along a circumference of the coil spring while the lower load center moves in an opposite direction along the circumference of the coil spring, and the lower load center substantially coincides with the upper load center and subsequently further moves in the opposite direction. 1. A high-pressure pump for pressurizing and supplying a fuel to an internal combustion engine , comprising:a cylinder including a cylinder cylindrical portion having a cylindrical shape;a plunger having a rod shape and having one end disposed to be reciprocable inside the cylinder cylindrical portion, the plunger defining a pressurizing chamber for pressurizing the fuel between an outer wall of the one end and an inner wall of the cylinder; anda coil spring formed of a wire wound in a coil shape and disposed radially outward of another end of the plunger, the coil spring urging the other end of the plunger away from the pressurizing chamber and being capable of pressing the other end of the plunger against a cam of a driven shaft of the internal combustion engine, whereina center of load in a virtual plane including an end face of the coil spring facing the pressurizing chamber in an axial direction is defined as an upper load center, and a center of load in a virtual plane including an end face of the coil spring facing the cam in the axial direction is defined as a lower load center,the coil spring is configured such that when viewed in the axial ...

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Номер записи: 99
06-07-2017 дата публикации

Roller lifter

Номер: US20170191384A1
Автор: Hideki Oka, Hiroki Fujii, Naoyuki Yamane
Принадлежит: Otics Corp

An object is to provide a roller lifter which can maintain a proper dimensional accuracy of an outer diameter. A shaft ( 25 ) rotatably supporting a roller ( 30 ) is inserted through a pair of opposed portions ( 21 ) and swaged to be fixed. A cylindrical portion ( 61 ) is disposed to be fixed at a relative position to the opposed portions ( 21 ). Upon rotation of a cam ( 90 ), the cylindrical portion ( 61 ) is reciprocated via the roller ( 30 ). The roller lifter ( 10 ) includes a first member ( 20 ) in which the shaft ( 25 ) is swaged to be fixed to the opposed portions ( 21 ) and a second member ( 60 ) separate from the first member ( 20 ) and couplable via a coupling member to the first member ( 20 ). The second member ( 60 ) includes at least the cylindrical portion ( 61 ).

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Номер записи: 100