Combustion control system for diesel engine
AssigneeNissan Motor Co., Ltd.
InventorShuji Kimura
Life of this patent
Estimating the term…
Abstract
A combustion control system for a diesel engine provided with a fuel injection system and a sensor for detecting an ignition timing. The combustion control system comprises a control unit which is configured to control the ignition timing to be restored to a target value when the ignition timing shifts from the target value owing to circumferential factors such as cetane number of fuel. Preferably, the ignition timing is controlled to generally coincide with or be retarded relative to a fuel injection termination timing. This regulates an ignition delay period to be longer than a fuel injection period in a predetermined engine operating region, thereby effectively accomplishing so-called low temperature premix combustion.
Claims6
A combustion control system for a diesel engine, comprising:
- a section for detecting an ignition timing;
- a section for judging that the detected ignition timing is retarded relative to a target value;
- and
- a section for controlling the detected ignition timing to approach a fuel injection termination timing when the detected ignition timing is retarded relative to the target value, the controlling section including a section for accomplishing at least one of a first operation of advancing a fuel injection initiation timing, a second operation of decreasing a fuel injection rate, a third operation of raising a temperature at a terminal period of compression stroke, and a fourth operation of increasing an EGR rate.
Dependencies are inferred from the claim text.