Control system for self-ignition type gasoline engine
AssigneeNissan Motor Co., Ltd.
InventorsYasunori Iwakiri, Koudai Yoshizawa, Atsushi Teraji
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Abstract
An engine control unit controls a self-ignition gasoline engine which is capable of changing a combustion condition of the engine between a self-ignition combustion and a spark-ignition combustion according to an engine operating condition. The control unit executes detecting an combustion condition in the engine, detecting a self-ignition limit of a region for executing the self-ignition combustion on the basis of the combustion condition, and varying a combustion parameter for the combustion during the self-ignition combustion so that the combustion condition approaches the self-ignition combustion limit and a self-ignition combustion operation is executed under a condition maintaining the self-ignition limit.
Claims13
A control system of a self-ignition gasoline engine, the control system changing a combustion condition of the engine between a self-ignition combustion and a spark-ignition combustion according to an operating condition of the engine, the control system comprising:
- a combustion condition detector that detects an combustion condition in the engine;
- and
- an engine control unit connected to said combustion condition detector, said engine control unit detecting a self-ignition limit of a self-ignition combustion region on the basis of the combustion condition, and varying a combustion parameter during the operation of the self-ignition combustion, so that the combustion condition approaches the self-ignition combustion limit and the self-ignition combustion operation is executed under a condition maintaining the self-ignition limit.
A control system of a self-ignition gasoline engine, the control system changing a combustion condition of the engine between a self-ignition combustion and a spark-ignition combustion according to an operating condition of the engine, the control system comprising:
- combustion condition detecting means for detecting an combustion condition in the engine;
- self-ignition limit detecting means for detecting a self-ignition limit of a self-ignition combustion region on the basis of the combustion condition;
- and
- combustion parameter varying means for varying a combustion parameter during a self-ignition combustion so that the combustion condition approaches the self-ignition combustion limit and a self-ignition combustion operation is executed under a condition maintaining the self-ignition limit.
A method of controlling a self-ignition gasoline engine which is capable of changing a combustion condition of the engine between a self-ignition combustion and a spark-ignition combustion according to an operating condition of the engine, the method comprising:
- detecting an combustion condition in the engine;
- detecting a self-ignition limit of a region for executing the self-ignition combustion on the basis of the combustion condition;
- and
- varying a combustion parameter for the combustion during the self-ignition combustion so that the combustion condition approaches the self-ignition combustion limit and a self-ignition combustion operation is executed under a condition maintaining the self-ignition limit.
Dependencies are inferred from the claim text.