摘要:
An engine has a variable valve actuation mechanism that varies lift characteristics of an intake valve. An idle speed control apparatus has a control section for controlling an intake air amount of the engine in an idle state for adjusting an actual engine speed to a target engine speed. The control section sets a control amount related to control of the intake air amount in correspondence with the lift characteristics, which are varied by the variable valve actuation mechanism. Accordingly, the engine speed in the idle state is effectively controlled in correspondence with changes of the lift characteristics.
摘要:
If a valve timing adjusting mechanism has a problem, an ECU determines whether or not actual valve timing VTa is larger than valve timing advanced angle limit value VTegr. Depending on the determination, the ECU selects a value for target valve operating angle VLt from safety angles including intermediate valve operating angle VLmid and maximum valve operating angle VLmax. Each of the safety angles VLmid, VLmax is a valve operating angle at which engine combustion is stabilized at the current valve timing. With the valve operating angle fixed at the safety angle VLmid or VLmax, a throttle valve controls intake air amount. This prevents the engine combustion from becoming unstable, thus enabling the engine to be operated in an engine safety mode.
摘要:
An ignition timing control apparatus for an engine includes a controller that sets an ignition timing considering a change of a temperature or a pressure in a combustion chamber at a time when an opening/closing characteristic of an intake valve is changed, the opening/closing characteristic including a valve opening timing and a valve closing timing at least one of which is changed by a variable valve mechanism for the engine.
摘要:
A fuel heating control method and apparatus includes an operation of a heater heating a fuel for an engine started by being driven by a starting motor. The heater is not operated until after an operation of the starting motor is substantially terminated at a time of starting the engine.