ELECTROMECHANICAL VALVE TIMING DURING A START
First Claim
Patent Images
1. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
- during engine starting, adjusting valve timing of at least a cylinder to provide a desired air amount in said cylinder, based on at least an operating condition of said engine.
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Accused Products
Abstract
A system and method to control engine valve timing to during the start of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce hydrocarbon emissions during the start of an internal combustion engine. The method controls intake valves so that smaller adjustments are made to cylinder spark advance and air-fuel over a range of operating conditions.
149 Citations
36 Claims
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1. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
during engine starting, adjusting valve timing of at least a cylinder to provide a desired air amount in said cylinder, based on at least an operating condition of said engine. - View Dependent Claims (2, 3, 4, 5, 27, 35, 36)
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6. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
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determining a target cylinder air amount, for at least a cylinder, based on a number of fueled cylinder events;
inducting said target cylinder air amount by adjusting intake valve timing;
injecting a fuel amount based on said target cylinder air amount into said at least a cylinder; and
combusting said fuel in said cylinder. - View Dependent Claims (28)
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7. A method for starting an internal combustion engine with electrically actuated valves, the method comprising;
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determining a target cylinder fuel amount based on a number of fueled cylinder events;
inducting a cylinder air amount based on said target cylinder fuel amount by adjusting intake valve timing;
injecting fuel into cylinders; and
combusting said fuel in said cylinders. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 29)
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16. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
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determining the position of said engine in response to a request to start said engine;
determining a target cylinder fuel amount based on a number of cylinder events after determining said engine position;
inducting a cylinder air amount based on said target cylinder fuel amount by adjusting intake valve timing;
injecting fuel into cylinders based on said target cylinder air amount; and
combusting said fuel in said cylinders. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 30)
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25. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
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closing at least an exhaust valves of said engine based on a request to start said engine;
determining a target cylinder fuel amount for at least a cylinder of said engine;
inducting a cylinder air amount based on said target cylinder fuel amount by adjusting intake valve timing;
injecting fuel into said at least a cylinder;
combusting said fuel in said at least a cylinder; and
operating said at least an exhaust valve after said combustion in said at least a cylinder. - View Dependent Claims (31)
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26. A computer readable storage medium having stored data representing instructions executable by a computer to control an internal combustion engine of a vehicle, said storage medium comprising:
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instructions for determining a target cylinder air amount, for at least a cylinder, based on at least an operating condition of said engine; and
adjusting valve timing, during engine cranking and run-up, of a cylinder based on said target cylinder air amount.
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32. A method for starting an internal combustion engine with electrically actuated valves, the method comprising:
during engine starting, adjusting valve timing of at least a cylinder to provide a desired air amount in said cylinder. - View Dependent Claims (33, 34)
Specification