Patent ID: 8555615
Filing Date: 2013-10-15
Classification: B60K,B60L,B60W,F02D,F02M,Y02T

Abstract:
1. An internal combustion engine exhaust gas control system, which is applied to a hybrid vehicle that is powered by an internal combustion engine and an electric motor, the internal combustion engine exhaust gas control system comprising: an exhaust gas control catalyst provided in an exhaust passage of the internal combustion engine; an exhaust throttle valve, provided downstream of the exhaust gas control catalyst, that changes a sectional area of the exhaust passage; an electronic control unit; a memory, the memory storing instructions that when executed cause the electronic control unit to perform as: wherein: the first catalyst warm-up device increases the fuel injection quantity to increase a temperature of exhaust gas flowing into the exhaust gas control catalyst to a target exhaust gas temperature when the opening amount of the exhaust throttle valve is reduced to a target opening amount, the target exhaust gas temperature is calculated by adding a reference temperature difference to a detected exhaust gas control catalyst temperature, and an increase amount of the fuel injection quantity is reduced as the target opening amount of the exhaust throttle valve is reduced.