CONTROL METHOD FOR CVVL ENGINE

摘要

The present invention relates to a control method for a continuously variable valve lift engine, wherein the control method comprises: a step of allowing the control part of a vehicle to determine whether or not the engine is in an idle state and the oil temperature in the engine is included in a predetermined range; a step of allowing the control part to control the engine into a predetermined control state when the engine is in the idle state and the oil temperature is included in the predetermined range; and a step of allowing the control part to control the engine to be converted into a passive state if an error generation time measured by the control part exceeds a predetermined time when an error is generated in a process in which the control part controls the engine into the control state, wherein the control state is the maximum advanced state of the intake cam of a continuously variable valve lift; the engine speed is a predetermined basic idle RPM and the valve lift is in a predetermined high-lift state; the passive state is the parking state of the intake cam; and the engine speed is greater than the basic idle RPM and the valve lift is in a predetermined low-lift state. [Reference numerals] (AA) Yes; (BB) No; (S60) Control→Passive, count the number of conversions; (S70) Number > Predetermined value (C); (S80) Forcibly maintain a Passive state for a certain time; (S90) Implement a Passive state control (S40)