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US 2018/0283343 A1Published application
Method for Starting an Internal Combustion Engine
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorDin WABBALS
Life of this patent
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Abstract
A method for starting or stopping an internal combustion engine which reduces starter loading and engine vibrations is provided. The method includes varying a valve stroke of at least one cylinder of the engine such that during the starting or stopping procedure the at least one cylinder undergoes decompression.
Claims14
A method for starting or stopping an internal combustion engine, comprising the acts of:
- initiating a starting operation or a stopping operation,
- varying a valve stroke of an intake valve of at least one cylinder of the internal combustion engine such that the at least one cylinder is placed in a decompression state in which a reduced pressure is achieved relative to a pressure that would be present in the at least one cylinder when the valve stroke of the intake valve is a full valve stroke.
The method as claimed in claim, wherein
- all of the at least one cylinder are decompressed when the internal combustion engine is started.
The method as claimed in claim, wherein
- the varying the valve stroke of the inlet valve to obtain the decompression state of the at least one cylinder of the internal combustion engine is performed is obtained by varying the valve stroke of the inlet valve during an overrun operation.
A computer program product comprising:
- machine-readable code contained on a tangible medium, the machine-readable code being configured to be executable on a computer device to
- initiate a starting operation or a stopping operation,
- vary a valve stroke of an intake valve of at least one cylinder of the internal combustion engine such that the at least one cylinder is placed in a decompression state in which a reduced pressure is achieved relative to a pressure that would be present in the at least one cylinder when the valve stroke of the intake valve is a full valve stroke.
A control device for an internal combustion engine, comprising:
- a computer configured to
- initiate a starting operation or a stopping operation,
- vary a valve stroke of an intake valve of at least one cylinder of the internal combustion engine such that the at least one cylinder is placed in a decompression state in which a reduced pressure is achieved relative to a pressure that would be present in the at least one cylinder when the valve stroke of the intake valve is a full valve stroke.
Dependencies are inferred from the claim text.