Control device for cylinder-injection and spark-ignition type internal combustion engines
First Claim
1. A control apparatus for a cylinder-injection spark-ignition internal combustion engine, in which a fuel is injected directly into a combustion chamber of the internal combustion engine, comprising:
- operation state detecting means for detecting an operation state of the internal combustion engine;
injection mode setting means for setting one of a first injection mode for injecting the fuel mainly in a suction stroke and a second injection mode for injecting the fuel mainly in a compression stroke, in accordance with said detected operation state;
combustion parameter setting means for setting a value of at least one of parameters, that influence a combustion state in the combustion chamber, at a value for an injection mode set by said injection mode setting means;
combustion parameter changeover means for gradually changing the value of at least one of parameters, from a parameter value for an injection mode prior to a mode change towards a parameter value for an injection mode after the mode change, when a request for an injection mode change is set by said injection mode setting means; and
combustion state control means for controlling the combustion state of the internal combustion engine in accordance with the parameter value set by said combustion parameter setting means and changed by said combustion parameter changeover means in response to the injection mode change request.
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Accused Products
Abstract
A control apparatus that changes the fuel injection mode of a cylinder-injection spark-ignition internal combustion engine without causing a misfire or smoke, lowering the exhaust characteristics or fuel-efficiency, or bringing about a changeover shock provided. An electronic control unit (70) of the control apparatus sets a first-term injection mode for fuel injection in a suction stroke or a second-term injection mode for fuel injection in a compression stroke in accordance with the engine operation state, and sets the values of parameters, such as the fuel injection quantity, ignition timing, exhaust gas recirculation quantity, etc., which are concerned in the combustion state in the engine, at values suitable for the set injection mode, thereby controlling the engine operation. When a request for the change of the injection mode is made as the engine operation state is changed, the parameter values are changed from the values suitable for the injection mode before change into the values suitable for the injection mode after change at suitable timings.
40 Citations
29 Claims
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1. A control apparatus for a cylinder-injection spark-ignition internal combustion engine, in which a fuel is injected directly into a combustion chamber of the internal combustion engine, comprising:
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operation state detecting means for detecting an operation state of the internal combustion engine; injection mode setting means for setting one of a first injection mode for injecting the fuel mainly in a suction stroke and a second injection mode for injecting the fuel mainly in a compression stroke, in accordance with said detected operation state; combustion parameter setting means for setting a value of at least one of parameters, that influence a combustion state in the combustion chamber, at a value for an injection mode set by said injection mode setting means; combustion parameter changeover means for gradually changing the value of at least one of parameters, from a parameter value for an injection mode prior to a mode change towards a parameter value for an injection mode after the mode change, when a request for an injection mode change is set by said injection mode setting means; and combustion state control means for controlling the combustion state of the internal combustion engine in accordance with the parameter value set by said combustion parameter setting means and changed by said combustion parameter changeover means in response to the injection mode change request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A control apparatus for a cylinder-injection spark-ignition internal combustion engine, in which a fuel is injected directly into a combustion chamber of the internal combustion engine, comprising:
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operation state detecting means for detecting an operation state of the internal combustion engine; injection mode setting means for setting one of a first injection mode for injecting the fuel mainly in a suction stroke and a second injection mode for injecting the fuel mainly in a compression stroke, in accordance with said operation state; combustion parameter setting means for setting a value of at least one of parameters, that influence a combustion state in the combustion chamber, at a value for an injection mode set by said injection mode setting means; combustion parameter changeover means for changing the value of at least one of parameters, from a parameter value for an injection mode before a mode change to a parameter value for an injection mode after the mode change, when a request for an injection mode change is set by said injection mode setting means; and combustion state control means for controlling the combustion of the internal combustion engine in accordance with the parameter value set by said combustion parameter setting means and changed by said combustion parameter changeover means in response to the injection mode change request, wherein said combustion parameter changeover means changes the parameter value from the parameter value before mode change into the parameter value after mode change at a timing corresponding to the injection mode before change and the injection mode after change when the injection mode change request is discriminated.
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Specification