An engine ECU executes a program including the step of calculating an injection time Astart from the engine speed and load factor when arriving at the injection calculation timing of a cylinder located in the proximity of a knock sensor, the step of calculating an injection period TAU, the step of c
An engine ECU executes a program including the step of calculating an injection time Astart from the engine speed and load factor when arriving at the injection calculation timing of a cylinder located in the proximity of a knock sensor, the step of calculating an injection period TAU, the step of calculating an injection end time Aend, the step of shortening the injection time of an in-cylinder injector when the injection time Astart or injection end time Aend is within a KCS gate, and the step of calculating the port injection period so as to inject the insufficient injection quantity from an intake manifold injector when the required injection quantity will be insufficient as a result of shortening the injection period of the in-cylinder injector.
대표청구항▼
What is claimed is: 1. A control apparatus for an internal combustion engine including a first fuel injection mechanism for injecting fuel into a cylinder, and a second fuel injection mechanism for injecting fuel into an intake manifold, operating the fuel injection mechanism based on a fuel inject
What is claimed is: 1. A control apparatus for an internal combustion engine including a first fuel injection mechanism for injecting fuel into a cylinder, and a second fuel injection mechanism for injecting fuel into an intake manifold, operating the fuel injection mechanism based on a fuel injection timing and fuel injection period, and carrying out knock determination based on an output signal from a knock sensor in a knock determination period, said control apparatus comprising: a determination unit for determining whether a noise generated by an operation of said first fuel injection mechanism overlaps with an output signal from said knock sensor in said knock determination period, a modification unit for modifying at least one of the fuel injection timing and fuel injection period of said first fuel injection mechanism so as to avoid an event of the noise generated by an operation of said first fuel injection mechanism overlapping with the output signal of said knock sensor in said knock determination period, based on a determination result from said determination unit, and a control unit for controlling said second fuel injection mechanism so as to compensate for insufficiency when a required fuel injection quantity will be insufficient under a modified fuel injection state. 2. The control apparatus for an internal combustion engine according to claim 1, wherein said modification unit conducts modification so as to shorten the fuel injection period, said control apparatus further comprising a fuel pressure control unit controlling a fuel pressure such that said required fuel injection quantity can be supplied at the modified fuel injection period. 3. The control apparatus for an internal combustion engine according to claim 1, wherein said first fuel injection mechanism includes an in-cylinder injector, and said second fuel injection mechanism includes an intake manifold injector. 4. A control apparatus for an internal combustion engine including a first fuel injection mechanism for injecting fuel into a cylinder, and a second fuel injection mechanism for injecting fuel into an intake manifold, operating the fuel injection mechanism based on a fuel injection timing and fuel injection period, and carrying out knock determination based on an output signal from a knock sensor in a knock determination period, said control apparatus comprising: a determination unit for determining whether a noise generated by at least one of an operation of said first fuel injection mechanism and an operation of a high pressure fuel system that supplies fuel to said first fuel injection mechanism overlaps with an output signal from said knock sensor in said knock determination period, a modification unit for modifying a fuel pressure of said high pressure fuel system so as to avoid an event of the noise generated by said operation overlapping with the output signal of said knock sensor in said knock determination period, based on a determination result from said determination unit, and a control unit for controlling said second fuel injection mechanism so as to compensate for insufficiency when a required fuel injection quantity will be insufficient under a modified fuel pressure. 5. The control apparatus for an internal combustion engine according to claim 4, wherein said modification unit conducts modification so as to lower said fuel pressure, said control apparatus further comprising an injection period control unit controlling the fuel injection period such that said required fuel injection quantity can be supplied at the lowered fuel pressure. 6. The control apparatus for an internal combustion engine according to claim 5, wherein said injection period control unit effects control so as to increase said fuel injection period and set the end of said fuel injection period to become later than the end of said knock determination period. 7. A control apparatus for an internal combustion engine including first fuel injection means for injecting fuel into a cylinder, and second fuel injection means for injecting fuel into an intake manifold, operating the fuel injection means based on a fuel injection timing and fuel injection period, and carrying out knock determination based on an output signal from a knock sensor in a knock determination period, said control apparatus comprising: determination means for determining whether a noise generated by an operation of said first fuel injection means overlaps with an output signal from said knock sensor in said knock determination period, modify means for modifying at least one of the fuel injection timing and fuel injection period of said first fuel injection means so as to avoid an event of the noise generated by an operation of said first fuel injection means overlapping with the output signal of said knock sensor in said knock determination period, based on a determination result from said determination means, and control means for controlling said second fuel injection means so as to compensate for insufficiency when a required fuel injection quantity will be insufficient under a modified fuel injection state. 8. The control apparatus for an internal combustion engine according to claim 7, wherein said modify means conducts modification so as to shorten the fuel injection period, said control apparatus further comprising means for controlling a fuel pressure such that said required fuel injection quantity can be supplied at the modified fuel injection period. 9. The control apparatus for an internal combustion engine according to claim 7, wherein said first fuel injection means includes an in-cylinder injector, and said second fuel injection means includes an intake manifold injector. 10. A control apparatus for an internal combustion engine including first fuel injection means for injecting fuel into a cylinder, and second fuel injection means for injecting fuel into an intake manifold, operating the fuel injection means based on a fuel injection timing and fuel injection period, and carrying out knock determination based on an output signal from a knock sensor in a knock determination period, said control apparatus comprising: determination means for determining whether a noise generated by at least one of an operation of said first fuel injection means and an operation of a high pressure fuel system that supplies fuel to said first fuel injection means overlaps with an output signal from said knock sensor in said knock determination period, modify means for modifying a fuel pressure of said high pressure fuel system so as to avoid an event of the noise generated by said operation overlapping with the output signal of said knock sensor in said knock determination period, based on a determination result from said determination means, and control means for controlling said second fuel injection means so as to compensate for insufficiency when a required fuel injection quantity will be insufficient under a modified fuel pressure. 11. The control apparatus for an internal combustion engine according to claim 10, wherein said modify means conducts modification so as to lower said fuel pressure, said control apparatus further comprising injection period control means for controlling the fuel injection period such that said required fuel injection quantity can be supplied at the lowered fuel pressure. 12. The control apparatus for an internal combustion engine according to claim 11, wherein said injection period control means includes means for effecting control so as to increase said fuel injection period and set the end of said fuel injection period to become later than the end of said knock determination period.
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이 특허에 인용된 특허 (7)
Pischinger Franz (Im Erkfeld 4 5100 Aachen DEX) Havenith Cornelis (Kerkrade NLX), Air-compressing, self-igniting engine for liquid fuel.
Yamaguchi, Koichi; Urushihara, Tomonori; Yoshizawa, Koudai; Taniyama, Tsuyoshi, System and method for enhanced combustion control in an internal combustion engine.
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