Control device for diesel engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorAkiyuki IEMURA
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Abstract
A control device for a diesel engine that is capable of restraining deterioration of a combustion state in a wide range of temperature environment conditions, in a diesel engine including an EGR device. In the control device for a diesel engine including the EGR device which recirculates exhaust gas from an exhaust passage to an intake passage, means for performing reduction correction that reduces an exhaust gas recirculation amount by the EGR device when the combustion state of the diesel engine is deteriorated, means for acquiring a temperature correlation value having a correlation with a cylinder temperature at a time of ignition of the diesel engine, and means for restricting execution of reduction correction when the temperature correlation value is smaller than a threshold value.
Claims18
A control device for a diesel engine including an EGR device that recirculates exhaust gas from an exhaust passage to an intake passage, the control device comprising:
- control means configured to perform reduction correction that reduces an exhaust gas recirculation amount by the EGR device when a combustion state of the diesel engine is deteriorated;
- first acquisition means configured to acquire a temperature correlation value having a correlation with a cylinder temperature at a time of ignition of the diesel engine;
- and
- restriction means configured to restrict execution of the reduction correction when the temperature correlation value is smaller than a predetermined threshold value.
A diesel engine comprising:
- an EGR device that recirculates exhaust gas from an exhaust passage to an intake passage;
- and
- a controller programmed to:
- (i) perform reduction correction that reduces an exhaust gas recirculation amount by the EGR device when a combustion state of the diesel engine is deteriorated,
- (ii) acquire a temperature correlation value having a correlation with a cylinder temperature at a time of ignition of the diesel engine, and
- (iii) restrict execution of the reduction correction when the temperature correlation value is smaller than a predetermined threshold value.
Dependencies are inferred from the claim text.