Cylinder-pressure-based electronic engine controller and method
AssigneeDelphi Technologies, Inc.
InventorsHarry L. Husted, Clinton W. Erickson, Ashish D Punater, Karl A. Schten, Gerald A Kilgour, Michael P. Conyers
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Abstract
An engine data acquisition and control system measures cylinder pressure at a high degree of resolution and then processes it for portions of the combustion cycle of interest for performing combustion calculations. The data are utilized to calculate combustion parameters, and the combustion parameters may be utilized to control the engine's fuel and/or spark timing/duration, and other variables affecting the combustion process. The system architecture provides for acquisition of very large amounts of data without unduly loading the CPU.
Claims34
An engine control system utilizing cylinder pressure, comprising:
- a plurality of pressure sensors configured to measure cylinder pressures of an internal combustion engine during combustion events and generate analog cylinder pressure data concerning combustion events;
- at least one analog-to-digital converter operably connected to the pressure sensors to convert analog cylinder pressure data from the pressure sensors into digital cylinder pressure data;
- a plurality of memory buffers, wherein each memory buffer is configured to receive digital cylinder pressure data from the analog-to-digital converter, wherein each memory buffer has sufficient capacity to store digital cylinder pressure data for multiple combustion events of an internal combustion engine;
- the control system utilizing the digital cylinder pressure data from the memory buffers to calculate combustion parameters, wherein the digital cylinder pressure data utilized during portions of the engine cycle that are in the vicinity of a combustion event have a first angular resolution, and wherein the digital cylinder pressure data utilized during other portions of the engine cycle has a second angular resolution that is lower than the first angular resolution, the control system providing control of an internal combustion engine based, at least in part, on the calculated combustion parameters.
An engine control system for internal combustion engines having a plurality of cylinders, the control system comprising:
- a plurality of pressure sensors configured to measure the cylinder pressure of each cylinder of an internal combustion engine and provide cylinder pressure data;
- an on-board controller operably connected to the pressure sensors, wherein the on-board controller is configured to be mounted in a vehicle to provide control during engine operation;
- and wherein:
- the on-board controller utilizes cylinder pressure data from the pressure sensors to calculate at least one combustion parameter for a combustion event occurring during an engine cycle, and wherein the at least one combustion parameter is calculated before another combustion event occurs during the next engine cycle, and the combustion parameter is used to control the next combustion event occurring during the next engine cycle.
A closed-loop engine control system utilizing measured cylinder pressure to control engine input affecting combustion in a four-cycle internal combustion engine, the control system comprising:
- a plurality of pressure sensors configured to measure cylinder pressures of an internal combustion engine during combustion events and generate cylinder pressure data concerning combustion events;
- a fuel injection system configured to provide fuel to the cylinders of an internal combustion engine;
- wherein the control system utilizes the cylinder pressure data to calculate combustion parameters, and provides control of at least one of a volume of fuel supplied to a cylinder and the timing of the fuel supplied to a cylinder of an internal combustion engine by the fuel injection system based, at least in part, on the combustion parameters.
Dependencies are inferred from the claim text.