HYBRID VEHICLE AND CONTROL METHOD FOR HYBRID VEHICLE

摘要

A hybrid vehicle including an engine (20) having a catalyst (27) in an exhaust passage, first and second motor generators (MG1, MG2), a battery (63) and a power transmission mechanism (30, 50) coupling a drive shaft (53), the engine (20) and the motor generators (MG1, MG2) by a gear mechanism such that torque is transmittable, and its control method, are provided. When a coolant temperature is a threshold or below, catalyst warm-up operation for starting the engine (20) and retarding an ignition timing by a retardation amount is executed. When a battery level is a threshold or below, forced charging operation for starting the engine (20) and charging the battery (63) by driving the first motor generator (MG1) is executed. During the forced charging operation, an engine load is changed on the basis of the battery level. When the catalyst warm-up operation is executed during the forced charging operation, the retardation amount for facilitating warm-up of the catalyst (27) is reduced as the engine load increases.