Dual-frequency coil array for a magnetic resonance imaging (MRI) system

A dual-frequency coil array for a magnetic resonance imaging (MRI) system is provided. The coil array includes a first coil element having a pair of dual-frequency loop coils and a second coil element having a pair of dual-frequency loop coils. The coil array further includes at least one capacitive mesh configured to decouple the pairs of dual-frequency loop coils of the first and second coil elements.

METHOD AND APPARATUS TO REDUCE ENGINE NOISE IN A DIRECTION INJECTION ENGINE

A method to reduce engine noise in a multi-cylinder direct injection internal combustion engine. The internal combustion engine includes a high pressure fuel pump having both an inlet valve fluidly connected to a fuel source and an outlet valve typically connected to a pressurized fuel rail. In order to reduce engine noise, especially at low engine speeds, the timing of the opening of either the fuel pump inlet valve or fuel pump outlet valve is varied so that it coincides with the opening of the fuel injectors. 1. In a multi-cylinder direct injection internal combustion engine having at least one fuel injector per cylinder which , when open , injects fuel into its associated cylinder and a high pressure fuel pump having an inlet valve and an outlet valve , a method for reducing engine noise comprising the steps of:varying the timing of the opening of one of the fuel pump inlet valve and the fuel pump outlet valve to substantially coincide with opening of the fuel injectors.2. The method as defined in and further comprising the steps of:determining the engine speed,only varying said timing when the engine speed is less than a predetermined threshold.3. The method as defined in wherein the pump includes a multi-lobe cam which drives a pump plunger and wherein said varying step comprises the step of varying the cam angle of the cam.4. The method as defined in wherein said varying step comprises the steps of:determining a crank angle of an engine crankshaft,calculating an inverse angular frequency of the crank angle,comparing the difference between the fuel pump inlet valve timing and the fuel injector timing multiplied by the inverse angular frequency of the crank angle to a predetermined threshold, andvarying the timing of the fuel pump inlet valve timing to more closely correspond to said fuel injector timing only when the difference between the fuel pump inlet valve timing and the fuel injector timing multiplied by the inverse angular frequency of the crank angle ...

FUEL DELIVERY SYSTEM

A fuel delivery system for a direct injection internal combustion engine having two fuel rails and a plurality of fuel injectors attached to and fluidly connected with each fuel rail. A first fuel pump has its output connected with the first fuel rail while a second fuel pump has its output connected with the second fuel rail. A crossover pipe fluidly connects the outlets of both the first and second pumps. Both the first pump and the second pump each have an intake stroke and a pumping stroke. Furthermore, the intake stroke of the first pump coincides with the pumping stroke of the second pump and vice versa. 1. A fuel delivery system comprising:a first and second fuel rails, each fuel rail having a fuel passageway,a plurality of fuel injectors, at least two of said fuel injectors fluidly connected to the fuel passageway of each fuel rail,a first fuel pump having a first pumping cycle, said first fuel pump having an inlet connected to a fuel source and an outlet fluidly connected to said fuel passageway of said first fuel rail,a second fuel pump having a second pumping cycle, said second fuel pump having an inlet connected to a fuel source and an outlet fluidly connected to said fuel passageway of said second fuel rail,a crossover pipe fluidly connecting the outlets of said first and second fuel pumps,wherein each of said first and second pumping cycles has an intake stroke and a pumping stroke, andwherein said intake stroke of said first pump coincides with the pumping stroke of said second pump and the pumping stroke of said first pump coincides with the intake stroke of said second pump.2. The fuel delivery system of wherein said first and second pumps are each piston pumps.3. The fuel delivery system of wherein each of said pumps is a cam driven pump.4. The fuel delivery system of wherein said first and second pumps are substantially identical with each other.5. The fuel delivery system of and comprising a pressure relief valve fluidly connected between said ...

METHOD FOR CO-SIMULATION OF TWO OR MORE MATHEMATICAL MODELS

A method for the co-simulation of two or more interacting mathematical models in which each model has at least one input port and one output port for inputting and outputting values of parameters in a predefined parameter protocol. The unit of measurement is identified for each parameter in the model and a scaling factor is then generated to equalize the units of measurement for each parameter in each model. The parameter protocol for each port is then determined and a virtual bus with unique locations is configured for each parameter in the models. The parameters from the models are then configured as a function of the parameter protocol so that the same parameters from different models are associated with the same location in the virtual bus. 1. A method executed by a processor for the co-simulation of at least two interacting mathematical models , each model having at least one input port and one output port which input and output parameter values , respectively , in predetermined units of measurement , the method comprising the steps of:identifying the unit of measurement for each parameter in each model,generating scaling factors for each said parameter in each model to equalize the units of measurement for each parameter in each model,determining the parameter protocol for each model, andconfiguring a virtual bus having a unique memory location corresponding to each parameter as a function of the parameter protocol from each model so that the same parameter from each model is associated with the same unique location for said parameter in the virtual bus.2. The method as defined in wherein at least one of said models includes a parameter protocol list and wherein said identifying step further comprises the step of the processor interrogating said at least one model for its parameter protocol list and thereafter inputting the parameter protocol list by the processor.3. The method as defined in and further comprising the steps of:accessing a plurality of ...

FUEL RAIL FOR AN INTERNAL COMBUSTION ENGINE

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 ...

METHOD AND APPARATUS FOR ELECTRONIC CIRCUIT SIMULATION

A method and apparatus using a programmed processor for electronic circuit simulation in which raw data containing both independent and dependent variables is acquired. That raw data is analyzed using an analysis method which generates relationships between the independent and the dependent variables. A mathematical model is created from those relationships and this is repeated for at least two different analysis methods. The statistical error between the raw data and the computed dependent variables is then calculated and the analysis method having the smallest statistical error with sufficient sample size is selected. 1. A method using a programmed processor for electronic circuit simulation for a circuit comprising the steps of:a) acquiring a set of raw data from the circuit, said raw data containing at least one independent variable and at least one dependent variable,b) analyzing the raw data using an analysis method which generates relationships between the raw data independent and dependent variables,c) generating a mathematical model from said relationships, said mathematical model having independent variables and computed dependent variables which correspond to the raw data independent and dependent variables,d) reiterating steps b) and c) for at least one different analysis method,e) using at least a portion of the set of raw data independent variables, determining the statistical error between the computed dependent variables and the corresponding raw data dependent variables for each mathematical model, andf) selecting the analysis method and its associated mathematical model having the smallest error.2. The method of wherein said selecting step further comprises the step of determining that the sample size of the raw data exceeds a minimum amount for each mathematical model.3. The method of and comprising the steps of creating a database containing data representing adequate sample sizes for different analyses methods and wherein said step of ...

Method and apparatus for controlling a solenoid actuated inlet valve

A method and apparatus for controlling a solenoid actuated inlet valve to a pump chamber of a piston pump. A control circuit energizes the solenoid to open the inlet valve in synchronism with the reciprocation of the piston and thereafter de-energize the solenoid to initiate closure of the inlet valve. The inlet valve is decelerated following de-energization of the solenoid thus effectively reducing engine noise attributable to the inlet valve. 1. A method for controlling a solenoid actuated inlet valve to a pump chamber of a fuel pump having a piston reciprocally mounted in the pump chamber comprising the steps of:energizing the solenoid to open the valve in synchronism with the reciprocation of the piston,thereafter de-energizing the solenoid to initiate closure of the valve in synchronism with reciprocation of the piston, anddecelerating the closure of the valve following de-energization of the solenoid.2. The method as defined in wherein said deceleration step comprises the step of reenergizing said solenoid with a voltage pulse after said de-energizing step and during closure of the valve.3. The method as defined in and further comprising the steps of:measuring the mechanical shock signal of the solenoid,determining the start and stop timing of the pulse as a function of said shock signal.4. The method as defined in and further comprising the steps of:measuring the fuel pressure after the output from the pump,determining the start and stop timing of the pulse as a function of said fuel pressure.5. The method as defined in and further comprising the steps of:measuring the mechanical shock signal of the solenoid,measuring the fuel pressure after the output from the pump,determining the start and stop timing of the pulse as a function of said shock signal and said fuel pressure.6. The method as defined in wherein said decelerating step comprises the step of connecting a resistor-capacitor network across energization terminals of the solenoid.7. The method as ...

WIRELESS VEHICLE CONTROL SYSTEM

A vehicle control system for a vehicle having a plurality of sensors and a plurality of actuators. The control system includes a sensor-actuator-transceiver (SAT) associated with each sensor and/or actuator to read and transmit and value of the sensor or receive a target value for the actuator and generate a control signal to the actuator. A server executes simulation software for each SAT as a software in the loop simulation which determines the target position of the actuators as the function of at least one sensor. A main transceiver at the server then transmits signals to the SATs to actuate the actuators to achieve a target value. 1. A vehicle control system for a vehicle having a plurality of sensors and a plurality of actuators , said control system comprising:a sensor-actuator-transceiver (SAT) associated with each sensor and/or actuator, each SAT being configured to read and transmit the value of its associated sensor and/or change the position of its associated actuator in response to an interrogation signal,a server configured to execute simulation software for each SAT which determines the target position of the actuators as a function of the value of at least one sensor, anda main transceiver configured to transmit signals to said SATs to actuate said actuators to move to said target position and receives sensor output data from said SATs.2. The vehicle control system as defined in wherein said SATs transmit said value to said server by wireless transmission.3. The vehicle control system as defined in wherein said main transceiver transmits to said SATs by wireless transmission.4. The vehicle control system as defined in wherein a unique SAT ID is assigned to each SAT and wherein said main transceiver communicates with said SATs by Internet Protocol (IP) packet having a target IP address and a SAT data packet containing the SAT ID claim 1 , the SAT ID being used to identify the SAT to which the transmission is directed.5. The vehicle control system as ...

Fuel delivery system

A fuel delivery system for a direct injection internal combustion engine having two fuel rails and a plurality of fuel injectors attached to and fluidly connected with each fuel rail. A first fuel pump has its output connected with the first fuel rail while a second fuel pump has its output connected with the second fuel rail. A crossover pipe fluidly connects the outlets of both the first and second pumps. Both the first pump and the second pump each have an intake stroke and a pumping stroke. Furthermore, the intake stroke of the first pump coincides with the pumping stroke of the second pump and vice versa.

Control system for an automotive vehicle

A control system for a vehicle having a plurality of subsystems in which each subsystem includes a sensor and/or actuator. A general purpose processor is programmed with a plurality of software applications in which each software application is associated with one of the vehicle subsystems. The subsystems and processor communicate with each other through an electrical bus and each subsystem includes a communication interface to receive commands from the processor as well as to send task signals to the processor. A task arbitrator prioritizes the order of execution of multiple task signals received by the processor during a preset time period. The general purpose processor then initiates execution of the software application associated with the subsystem of the sensor signal received from the task arbitrator and thereafter transmits a control signal to one or more of the subsystems via the bus as a result of execution of the associated software application.

Fuel delivery system for an internal combustion engine

A fuel delivery system for an internal combustion engine having a fuel pump with a high pressure outlet. A fuel rail defining an internal fuel chamber is fluidly connected to the fuel pump outlet. Additionally, at least two fuel injectors are fluidly connected to the fuel rail internal fuel chamber. At least one fluid check valve is fluidly positioned within the fuel rail in between two of the fuel injectors which reduces fuel pressure pulsations.

METHOD OF IDENTIFYING A VALUE OF AN UNKNOWN CIRCUIT COMPONENT IN AN ANALOG CIRCUIT

A method for identifying a value of an unknown circuit component for an analog signal having a known output profile in which a simulation list of the analog circuit is first created including the component with the unknown value. A transfer function for the known output value is then created using a programmed processor and the transfer function is then solved by the processor for the value of the unknown component. For nonlinear circuit components, a linear model is substituted for the nonlinear components prior to creating the simulation list. 1. A method of identifying unknown circuit parameter in an analog circuit comprising the steps of:creating simulation file of the analog circuit in circuit simulator including the unknown circuit parameters,generating transfer functions for designated input/output pin by using a programmed processor, andsolving said transfer function for unknown circuit parameter according to known input/output profile by using the programmed processor.2. The method as defined in wherein said solving step comprises the step of solving said transfer function at a DC steady state condition.3. The method as defined in where said transfer function comprises a Laplace transfer function.4. The method as defined in wherein said output profile is in the time domain.5. The method as defined in and comprising the step of converting said output profile to the frequency domain.6. The method as defined in wherein said converting step comprises the step of performing a Fourier transformation on said output profile.7. The method as defined in wherein said output profile is in the frequency domain.8. The method as defined in and comprising the step of substituting a mathematical circuit model for a non-linear circuit component.9. The method as defined in and comprising the step of applying a DC model linearization to the unknown component.10. The method as defined in and comprising the step of validating the value of the unknown circuit component by ...

Method and apparatus for controlling a solenoid actuated inlet valve of a fuel pump

A method and apparatus for controlling a solenoid actuated inlet valve to a pump chamber of a piston pump. A control circuit 112 energizes the solenoid 116 to open the inlet valve 104 in synchronism with the reciprocation of the piston 108 and thereafter de-energize the solenoid 116 to initiate closure of the inlet valve 104. The inlet valve 104 is decelerated following de-energization of the solenoid 116 thus effectively reducing engine noise attributable to the inlet valve 104.

Fuel pump

A high pressure fuel pump for use with a direct injection engine having a housing which defines a pump chamber. A port is formed in the housing which fluidly connects a fuel in the passageway with the pump chamber. An elongated valve is movably mounted within the housing between an open and a closed position. In its open position, the inlet passageway is fluidly connected with the pump chamber while, conversely, in the closed position the fuel valve blocks the fluid flow between the inlet passageway and the pump chamber. A circuit controls the deceleration of the valve to reduce pump noise.

Method and apparatus for simulating microcomputer-based systems

A method and apparatus for developing microcomputer-based systems. A controller model having at least one parameter is simulated and, similarly, a plant model having at least one parameter and controlled by the controller model is simulated. A user interface then has access to the parameters of the controller model and plant model and optionally suspends the execution of the controller model and plant model in response to a trigger event. The user interface determines the status of the controller model parameters and/or plant model parameters at the time of the trigger without altering the controller model parameters or plant model parameters or the program code of the controller model.

Method for generating computer software for embedded systems

A method for generating computer software for a microprocessor in an embedded system in which the system includes an input/output system (BIOS), at least one input/output channel, an application layer having at least one code module which processes input/output signals from its associated channel in the BIOS, and an operating system which schedules execution of events in the application layer. The method includes the steps of using a graphical user interface (GUI) to select channels of the BIOS by functionality. The GUI is then used to select one or more program code modules in the application layer to process the input/output signals from the BIOS and then associates the selected code modules with at least one channel in the BIOS. The GUI is then used to schedule event processing in the operating system. Upon completion, the method generates computer software in response to the selections made in the GUI to not only implement the inputs/outputs from the selected channels in the BIOS with the associated program code modules but also to implement the scheduled event processing in the operating system. The generated computer software is then stored in memory.

Verfahren und vorrichtung zur dämpfung der lautstärke einer brennstoffpumpe in einer direkteinspritz-verbrennungskammer

Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber

The present invention relates to a method and apparatus for attenuating fuel pump noise in a direct injection internal combustion engine (22). In one proposal, the direct injection fuel nozzle is suspended from a fuel rail (32) in a fashion that avoids direct metal-to-metal contact between the injector and the engine block (24). The direct injection nozzle may also be connected to the fuel rail (32) by a pair of spaced-apart seals which equalize the longitudinal pressure on the nozzle during operation. Enlarged diameter fuel reservoirs and/or a restricted orifice (96) may be provided fluidly in series between the fuel pump (36) and the direct injection nozzle in order to attenuate noise resulting from fuel pump pulsation.

燃料供給装置

【課題】 噴射器ノズルの開閉（燃焼室への燃料供給時）や燃料供給装置内での圧力変動によって燃料供給装置から過剰な騒音が発生する。 【解決手段】 二つの燃料レールと、各燃料レールに取り付けられて流体接続された複数の燃料噴射器と、を有する直噴内燃機関用燃料供給装置。第1燃料ポンプは第1燃料レールに接続された出口を備えており、第2燃料ポンプは第2燃料レールに接続された出口を備えている。交差パイプが第1燃料ポンプの出口および第2燃料ポンプの出口を流体接続している。第1燃料ポンプと第2燃料ポンプの両方ともそれぞれ吸入行程と排出行程を有している。さらに、第1燃料ポンプの吸入行程と第2燃料ポンプの排出行程は一致しており、あるいはその逆も同様である。 【選択図】 図１

資源割り当て方法及び資源割り当てシステム

【課題】適法なコピーの範囲内で、ソフトウエア資源を効率的に割り当てる。 【解決手段】本発明は、ソフトウエア資源を割り当てる方法及びシステムである。複数のタスクがネットワークから受け取られる。それぞれのタスクは、少なくとも１つのソフトウエア資源を要求する。それぞれのタスクが分析されて、タスクを実行するために要求される資源のタイプを決定する。ソフトウエア資源が利用可能であるか否かが判断され、利用可能である場合は、ソフトウエア資源がタスクに割り当てられる。利用可能でない場合は、ソフトウエア資源が利用可能になるまで、タスクはキューに格納される。 【選択図】図１４

マルチコアマイコンシステムのシミュレーション方法及びシミュレーション装置

【課題】マルチコアマイコンシステムの開発方法及び開発装置において、少なくとも一つのパラメータを有するマルチコアを有するコントローラモデルがシミュレートされ、同時に少なくとも一つのパラメータを有し前記コントローラモデルにより制御される装置モデルがシミュレートされる。 【解決手段】ユーザインターフェイスがコントローラモデルおよび装置モデルのパラメータにアクセスし、トリガーイベントに応じて選択的にコントローラモデルおよび装置モデルの実行を保留する。ユーザインターフェイスは、トリガー時にコントローラモデルおよび装置モデルのパラメータを変更することなく、コントローラモデルの各コアの種々のパラメータ及び装置モデルのパラメータの状態を決定し、決定された両コアのパラメータは表示装置に表示される。 【選択図】図１

Method for co-simulation of two or more mathematical models

A method for the co-simulation of two or more interacting mathematical models in which each model has at least one input port and one output port for inputting and outputting values of parameters in a predefined parameter protocol. The unit of measurement is identified for each parameter in the model and a scaling factor is then generated to equalize the units of measurement for each parameter in each model. The parameter protocol for each port is then determined and a virtual bus with unique locations is configured for each parameter in the models. The parameters from the models are then configured as a function of the parameter protocol so that the same parameters from different models are associated with the same location in the virtual bus.

アナログ回路における未知の回路部品の値を特定する方法

【課題】回路又は集積回路の供給業者によって指定された入出力プロファイルと一致する、アナログ回路における未知の回路パラメータを自動的に特定する方法を提供する。 【解決手段】未知の値を有する部品を含むアナログ回路のシミュレーションリストが最初に作成される、既知の出力プロファイルを有するアナログ信号に対して未知の回路部品の値を特定する方法で、既知の出力値に対する伝達関数が、プログラムされたプロセッサを使用して作成され、次に伝達関数は、未知の部品の値に対してプロセッサによって解を求められる。非線形回路部品の場合、シミュレーションリストを作成する前に、線形モデルは非線形部品に置き換えられる。 【選択図】図１

Virtual resource management tool for cloud computing service

A system and method for allocating software resources. Multiple tasks are received from a network in which each task requires at least one software resource. Each task is analyzed to determine the type of resource(s) required to execute each such task. The availability of the software resource(s) is determined and, if available, allocated to the requesting task. If the software resource(s) is not available, the task is stored in a queue until the software resource(s) becomes available.

Method of identifying a value of an unknown circuit component in an analog circuit

A method for identifying a value of an unknown circuit component for an analog signal having a known output profile in which a simulation list of the analog circuit is first created including the component with the unknown value. A transfer function for the known output value is then created using a programmed processor and the transfer function is then solved by the processor for the value of the unknown component. For nonlinear circuit components, a linear model is substituted for the nonlinear components prior to creating the simulation list.

Control system for an automotive vehicle

A control system for a vehicle having a plurality of subsystems in which each subsystem includes a sensor and/or actuator. A general purpose processor is programmed with a plurality of software applications in which each software application is associated with one of the vehicle subsystems. The subsystems and processor communicate with each other through an electrical bus and each subsystem includes a communication interface to receive commands from the processor as well as to send task signals to the processor. A task arbitrator prioritizes the order of execution of multiple task signals received by the processor during a preset time period. The general purpose processor then initiates execution of the software application associated with the subsystem of the sensor signal received from the task arbitrator and thereafter transmits a control signal to one or more of the subsystems via the bus as a result of execution of the associated software application.

Method and apparatus for controlling a solenoid actuated inlet valve

A method and apparatus for controlling a solenoid actuated inlet valve to a pump chamber of a piston pump. A control circuit energizes the solenoid to open the inlet valve in synchronism with the reciprocation of the piston and thereafter de-energize the solenoid to initiate closure of the inlet valve. The inlet valve is decelerated following de-energization of the solenoid thus effectively reducing engine noise attributable to the inlet valve.

Fuel delivery system

A fuel delivery system for a direct injection internal combustion engine having two fuel rails and a plurality of fuel injectors attached to and fluidly connected with each fuel rail. A first fuel pump has its output connected with the first fuel rail while a second fuel pump has its output connected with the second fuel rail. A crossover pipe fluidly connects the outlets of both the first and second pumps. Both the first pump and the second pump each have an intake stroke and a pumping stroke. Furthermore, the intake stroke of the first pump coincides with the pumping stroke of the second pump and vice versa.

Fuel delivery system for an internal combustion engine

A fuel delivery system for an internal combustion engine having a fuel pump with a high pressure outlet. A fuel rail defining an internal fuel chamber is fluidly connected to the fuel pump outlet. Additionally, at least two fuel injectors are fluidly connected to the fuel rail internal fuel chamber. At least one fluid check valve is fluidly positioned within the fuel rail in between two of the fuel injectors which reduces fuel pressure pulsations.