Fuel injection control device for a diesel engine
AssigneeNissan Motor Co., Ltd.
InventorsHiroyuki Itoyama, Takanobu Aikawa
Life of this patent
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Abstract
In a diesel engine (1) provided with an exhaust gas recirculation mechanism (9, 10), a fuel injection timing is calculated by considering a delay of air aspirated by the cylinders of the engine (1) and a delay of exhaust gas recirculation. By performing fuel injection based on this fuel injection timing, conditions of combustion in a cylinder of the engine (1) are improved.
Claims12
A fuel injection control device for a diesel engine, the diesel engine comprising a fuel injection mechanism that controls a timing of fuel injection, a exhaust gas recirculation mechanism that recirculates part of exhaust gas into air introduced into a cylinder of the engine, and a turbocharger that pressurizes fresh air introduced into the cylinder of the engine, the device comprising:
- a sensor that detects a running condition of the engine;
- and
- a programmable controller programmed to:
- set a basic fuel injection timing based on the running condition of the engine;
- correct the basic fuel injection timing according to a delay of a real exhaust gas recirculation amount to a target exhaust gas recirculation amount;
- and
- control the fuel injection mechanism based on the corrected injection timing.
A fuel injection control device for a diesel engine, the diesel engine comprising means for injecting fuel, means for recirculating part of exhaust gas into air introduced into a cylinder of the engine, and means for pressurizing air introduced into the cylinder of the engine, the device comprises:
- means for detecting a running condition of the engine;
- means for setting a basic fuel injection timing based on the running condition of the engine;
- means for correcting the basic fuel injection timing according to a delay of a real exhaust gas recirculation amount to a target exhaust gas recirculation amount;
- and
- means for controlling the fuel injection mechanism based on the corrected injection timing.
A method for controlling fuel injection for a diesel engine, the diesel engine comprising a fuel injection mechanism that controls a timing of fuel injection, an exhaust gas recirculation mechanism that recirculates part of exhaust gas into air introduced into a cylinder of the engine, and a turbocharger that pressurizes fresh air introduced into the cylinder of the engine, the method comprises:
- detecting a running condition of the engine;
- setting a basic fuel injection timing based on the running condition of the engine;
- correcting the basic fuel injection timing according to a delay of a real exhaust gas recirculation amount to a target exhaust gas recirculation amount;
- and
- controlling the fuel injection mechanism based on the corrected injection timing.
Dependencies are inferred from the claim text.