Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.