ELECTROMECHANICAL VALVE TIMING DURING A START
2 Assignments
0 Petitions
Accused Products
Abstract
A method for starting an internal combustion engine with electrically actuated valves, the method comprising during at least a run-up in engine speed of engine starting, adjusting intake valve timing of an electrically actuated valve of 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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Citations
29 Claims
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1-13. -13. (canceled)
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14. A method for starting an engine comprising:
during a run-up in engine speed of engine starting, adjusting intake valve closing timing of an intake valve of a cylinder in response to barometric pressure to provide a desired air amount in said cylinder, with a longer valve opening with respect to crankshaft angle at higher altitudes as compared to a shorter valve opening with respect to crankshaft angle at lower altitudes for a given operating constraint. - View Dependent Claims (15, 16, 17)
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18. A method for starting an engine, comprising:
during engine cranking and run-up in engine speed of engine starting, requesting substantially the same engine torque at sea level and at a higher altitude, and providing said substantially same engine torque by adjusting cylinder intake valve timing to provide a desired air amount in said cylinder for given operating constraint, said torque generating a uniform engine speed at the sea level and the higher altitude. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method for starting an internal combustion engine, the method comprising:
during at least engine cranking and run-up in engine speed of engine starting, producing substantially the same engine torque at sea level and at a higher altitude, and injecting substantially the same amount of fuel at sea level and at said higher altitude into a cylinder when engine air amount is substantially the same between said sea level and said higher altitude. - View Dependent Claims (26, 27, 28, 29)
Specification