| abstract |
In the advanced two-stage VVL operation learning control method applied to the electric two-stage VVL system of the present invention, the lift controller 10 that performs VVL control of the electric two-stage VVL system 1 is the second stage of the exhaust valve when driving the vehicle in the EV mode. The VVL operation learning for the lift is performed in the EV mode in which the engine is driven under the engine coolant temperature condition while the clutch of the engine and the motor is disconnected, or in the HEV mode in which the engine is driven within the engine overrun time. The P2, P3, P4 type hybrid vehicle, which can be applied in EV mode by performing the learning time security control (S40-2), has the characteristic of securing the engine operating time for VVL system failure diagnosis and avoidance area learning like other vehicles. . |