METHOD AND DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE
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Accused Products
Abstract
A method for stopping an internal combustion engine, in which an air flow supplied via an air metering device, in particular a throttle valve of the internal combustion engine, is reduced after a stopping request has been ascertained, an undershoot point in time is ascertained, at which an ascertained speed of the internal combustion engine falls below a pre-definable speed threshold value, after the undershoot point in time, the air flow supplied via the air metering device of the internal combustion engine is increased again, the predefinable speed threshold value being selected in such a way that an intake cylinder no longer enters a compression stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill, a degree of opening of the air metering device to increase the supplied air flow being selected as a function of a coasting speed of the internal combustion engine.
12 Citations
21 Claims
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1-10. -10. (canceled)
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11. A method for stopping an internal combustion engine, comprising:
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supplying an air flow via an air metering device of the internal combustion engine; reducing the airflow after a stopping request has been ascertained; ascertaining an undershoot point in time, at which an ascertained speed of the internal combustion engine falls below a predefinable speed threshold value; after the undershoot point in time, increasing again the air flow supplied via the air metering device of the internal combustion engine; selecting the predefinable speed threshold value in such a way that an intake cylinder no longer enters a compression stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill; and selecting a degree of opening of the air metering device to increase the supplied air flow as a function of a coasting speed of the internal combustion engine. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A computer program containing program code that when executed results in performing a method for stopping an internal combustion engine, comprising:
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supplying an air flow via an air metering device of the internal combustion engine; reducing the airflow after a stopping request has been ascertained; ascertaining an undershoot point in time, at which an ascertained speed of the internal combustion engine falls below a predefinable speed threshold value; after the undershoot point in time, increasing again the air flow supplied via the air metering device of the internal combustion engine; selecting the predefinable speed threshold value in such a way that an intake cylinder no longer enters a compression stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill; and selecting a degree of opening of the air metering device to increase the supplied air flow as a function of a coasting speed of the internal combustion engine.
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20. An electrical storage medium for at least one of a control unit and a regulating unit of an internal combustion engine, the medium storing a computer program containing program code that when executed results in performing a method for stopping an internal combustion engine, comprising:
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supplying an air flow via an air metering device of the internal combustion engine; reducing the airflow after a stopping request has been ascertained; ascertaining an undershoot point in time, at which an ascertained speed of the internal combustion engine falls below a predefinable speed threshold value; after the undershoot point in time, increasing again the air flow supplied via the air metering device of the internal combustion engine; selecting the predefinable speed threshold value in such a way that an intake cylinder no longer enters a compression stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill; and selecting a degree of opening of the air metering device to increase the supplied air flow as a function of a coasting speed of the internal combustion engine.
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21. A control and/or regulating unit of an internal combustion engine, wherein the unit is programmed in such a way that to carry out a method for stopping an internal combustion engine, comprising:
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supplying an air flow via an air metering device of the internal combustion engine; reducing the airflow after a stopping request has been ascertained; ascertaining an undershoot point in time, at which an ascertained speed of the internal combustion engine falls below a predefinable speed threshold value; after the undershoot point in time, increasing again the air flow supplied via the air metering device of the internal combustion engine; selecting the predefinable speed threshold value in such a way that an intake cylinder no longer enters a compression stroke after the increase of the supplied air flow until the internal combustion engine is at a standstill; and selecting a degree of opening of the air metering device to increase the supplied air flow as a function of a coasting speed of the internal combustion engine.
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Specification