Delphi Technologies, Inc.

Krishnendu Kar

Sergio E Garcia

Robert Semidey

Andrew Paul Bagnasco

Edward George Himes

A system and method for controlling fuel delivery through a fuel injection system to an internal combustion engine is described. An engine controller calculates a mass of fuel for delivery to one of the cylinders through one of the fuel injectors, based upon the operation of the internal combustion engine. Gas temperature in the intake runner of the cylinder is determined, and a compensation term is selected based upon the calculated mass of fuel and the determined gas temperature in the intake runner of the cylinder. The calculated mass of fuel is adjusted using the compensation term, and the controller controls open time of the fuel injector based upon the adjusted calculated mass of fuel.

Method and apparatus to control fuel metering in an internal combustion engine

An ultra accurate gas injection system with vehicle transient air simulation is provided. The device includes an input device, at least one mass flow device, an air flow device, a controller, such as a PC based controller, and an output device. The air flow device issues an air flow rate signal indicative of at least the actual air flow rate and receives an air flow control signal. The controller issues gas and air flow control signals, repeatedly reads the air flow rate signal and compares the actual air flow rate with the target air flow rate. The controller adjusts the air flow control signal such that the actual air flow rate is substantially equal to the target air flow rate. The mass flow device injects at least one gas into the air stream which is subsequently emitted into the external system to simulate exhaust gas from a vehicle.

Ultra accurate gas injection system with vehicle transient air simulation

A method of determining the rubbing friction torque involves characterizing fuel cutoff engine deceleration, and calculating the rubbing friction torque for any combination of engine speed and powertrain temperature is calculated in accordance with a base point rubbing friction torque RFTdetermined at a base powertrain temperature Tand fuel cutoff characterization data. The calibration data characterizing fuel cutoff engine deceleration is obtained by alternately enabling and cutting off engine fuel delivery to cycle the engine speed between specified set points, and measuring and recording the engine deceleration during intervals of fuel cutoff. The rubbing friction torque RFTat a given test temperature Tis calculated according towhere DECELand DECELare the fuel cutoff engine decelerations at the test and base points, respectively, and PFT, and PFTare the pumping friction torques at the test and base points, respectively.

Method of determining rubbing friction torque in a motor vehicle powertrain

An ultra accurate gas injection system includes an input device for inputting setpoint data including a target flow rate for the flow of gas into the system. The gas flows through a mass flow controller at an actual flow rate. The mass flow controller issues a flow rate signal indicative of at least the actual flow rate and receives a flow control signal. The mass flow controller is configured to control the actual flow rate dependent at least in part upon the flow control signal. A programmable controller is electrically connected to the input device and the mass flow controller. The programmable controller receives the setpoint data from the input device and issues the flow control signal, the flow control signal being dependent at least in part upon the target flow rate contained within the setpoint data. The programmable controller repeatedly reads the flow rate signal and compares the actual flow rate with the target flow rate. The programmable controller adjusts the flow rate signal dependent at least in part upon the comparison of the actual flow rate with the target flow rate, and is configured to adjust the flow control signal such that the actual flow rate is substantially equal to the target flow rate. The programmable controller issues an output signal dependent at least in part upon the flow rate signal. An output device is electrically connected to the programmable controller and receives the output signal. The output device indicates the actual flow rate.

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Webster, NY, United States of America

Krishnendu Kar