초록 ▼

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, ba

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.

대표청구항 ▼

The invention claimed is: 1. A method for starting an internal combustion engine comprising: during at least a run-up in engine speed of engine staffing, adjusting intake valve closing timing of an electrically actuated valve of a cylinder in response to barometric pressure to provide a desired air

The invention claimed is: 1. A method for starting an internal combustion engine comprising: during at least a run-up in engine speed of engine staffing, adjusting intake valve closing timing of an electrically actuated 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 compared to a shorter valve opening with respect to crankshaft angle at lower altitudes. 2. The method of claim 1 further comprising adjusting said intake valve closing timing of said electrically actuated valve in response to a temperature of said engine. 3. The method of claim 1 further comprising adjusting said intake valve closing timing of said electrically actuated valve in response to a temperature of ambient air. 4. The method of claim 1 further comprising adjusting said intake valve closing timing of said electrically actuated valve in response to a desired engine torque amount. 5. A method for starting an internal combustion engine with electrically actuated valves, the method comprising: during at least engine cranking and 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 even as barometric pressure changes, where the intake valve timing adjustment compensates for changes in barometric pressure by generating a longer crank angle valve opening at higher altitudes compared to a shorter crank angle valve opening at lower altitudes. 6. The method of claim 5 where the desired air amount includes a predetermined cylinder air amount. 7. The method of claim 5 further comprising injecting a fuel amount based on the desired air amount. 8. The method of claim 7 where the fuel amount is further based on a number of fueled cylinder events. 9. The method of claim 5 where the desired air amount is further based on a temperature of said engine. 10. The method of claim 5 further comprising adjusting a spark timing based on said air amount. 11. The method of claim 7 further comprising injecting fuel directly into the cylinder. 12. 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: instructions for determining a target cylinder air amount, for at least a cylinder, based on at least an operating condition of said engine; and instructions for, during at least engine cranking and run-up, adjusting at least intake valve timing of the cylinder based on said target cylinder air amount, where said adjusting is further responsive to barometric pressure to provide a longer crank angle intake valve opening at higher altitudes compared to a shorter crank angle valve opening at lower altitudes to provide said target cylinder air amount.