Patent ID: 9103290
Filing Date: 2015-08-11
Classification: F01L,F02D,Y02T

Abstract:
1. A control method for a continuous variable valve lift (CVVL) engine, comprising: determining, by a control unit of a vehicle, whether the engine is in an idle state and an oil temperature of the engine is within a predetermined range; controlling, by the control unit, the engine in a predetermined control state when the engine is in the idle state and the oil temperature is within the predetermined range; and measuring, by the control unit, an error occurrence time when an error occurs in controlling the engine in the predetermined control state, and controlling the engine while switching the engine to a predetermined passive state when the error occurrence time is more than a preset time, wherein in the predetermined control state, an intake cam of the CVVL engine is in a maximum advancing state, an engine speed is a set basic idle RPM, and a valve lift is in a predetermined high lift state, and wherein in the predetermined passive state, the intake cam is in a parking state, the engine speed is larger than the basic idle RPM, and the valve lift is in a predetermined low lift state.