Method for metering fuel into combustion chambers of an internal combustion engine
First Claim
1. A control unit which controls metering of fuel to at least one combustion chamber of an internal combustion engine, including at least one combustion chamber having at least one pilot injection and one main injection per combustion cycle, combustion features being processed and an effect of a fuel quantity injected prior to the main injection being ascertained from the combustion features, the control unit being adapted to ascertain an actual value of a combined effect of at least two pilot injections per combustion cycle and to regulate an actual value to a setpoint value via an intervention on at least one of the pilot injections.
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Abstract
A method and control unit for metering fuel into at least one combustion chamber of an internal combustion engine comprising at least one pilot injection and one main injection per combustion cycle, combustion features being detected and an effect of a fuel quantity injected prior to the main injection being ascertained from the combustion features. An actual value of a combined effect of at least two pilot injections per combustion cycle is ascertained and the actual value is regulated to a setpoint value via an intervention on at least one of the pilot injections.
19 Citations
10 Claims
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1. A control unit which controls metering of fuel to at least one combustion chamber of an internal combustion engine, including at least one combustion chamber having at least one pilot injection and one main injection per combustion cycle, combustion features being processed and an effect of a fuel quantity injected prior to the main injection being ascertained from the combustion features, the control unit being adapted to ascertain an actual value of a combined effect of at least two pilot injections per combustion cycle and to regulate an actual value to a setpoint value via an intervention on at least one of the pilot injections.
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2. A control unit adapted to meter fuel into at least one combustion chamber of a combustion engine, the control unit adapted to control unit adapted to perform steps comprising:
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injecting at least one pilot injection and one main injection per combustion cycle; detecting combustion features; ascertaining an effect of a fuel quantity injected prior to the main injection from the combustion features; ascertaining an actual value of a combined effect for at least two pilot injections per combustion cycle; and regulating the actual value to a setpoint value via an intervention on at least one of the pilot injections.
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3. A method for metering fuel into at least one combustion chamber of an internal combustion engine, comprising:
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injecting at least one pilot injection and one main injection per combustion cycle; detecting combustion features; ascertaining an effect of a fuel quantity injected prior to the main injection from the combustion features; ascertaining an actual value of a combined effect for at least two pilot injections per combustion cycle; and regulating the actual value to a setpoint value via an intervention on at least one of the pilot injections. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification