초록 ▼

The exhaust emission of a hybrid vehicle is improved by providing a technology of achieving effective functioning of a regenerative catalytic apparatus by utilizing a feature of the hybrid vehicle of being driven by selectively operating an internal combustion engine and an auxiliary power source. T

The exhaust emission of a hybrid vehicle is improved by providing a technology of achieving effective functioning of a regenerative catalytic apparatus by utilizing a feature of the hybrid vehicle of being driven by selectively operating an internal combustion engine and an auxiliary power source. The regenerative catalytic apparatus in a hybrid vehicle is provided with a hybrid mechanism for driving the vehicle by selectively operating an internal combustion engine and an auxiliary power source; an exhaust-purifying catalyst provided in an exhaust passage of the internal combustion engine for purifying exhaust flowing in the exhaust passage; and heat-storage mechanism for storing heat generated in the internal combustion engine while the internal combustion engine is in an operating state, and utilizing the stored heat to suppress decrease in the temperature of the exhaust-purifying catalyst after the internal combustion engine is stopped.

대표청구항 ▼

The exhaust emission of a hybrid vehicle is improved by providing a technology of achieving effective functioning of a regenerative catalytic apparatus by utilizing a feature of the hybrid vehicle of being driven by selectively operating an internal combustion engine and an auxiliary power source. T

The exhaust emission of a hybrid vehicle is improved by providing a technology of achieving effective functioning of a regenerative catalytic apparatus by utilizing a feature of the hybrid vehicle of being driven by selectively operating an internal combustion engine and an auxiliary power source. The regenerative catalytic apparatus in a hybrid vehicle is provided with a hybrid mechanism for driving the vehicle by selectively operating an internal combustion engine and an auxiliary power source; an exhaust-purifying catalyst provided in an exhaust passage of the internal combustion engine for purifying exhaust flowing in the exhaust passage; and heat-storage mechanism for storing heat generated in the internal combustion engine while the internal combustion engine is in an operating state, and utilizing the stored heat to suppress decrease in the temperature of the exhaust-purifying catalyst after the internal combustion engine is stopped. m 1, wherein the step of regenerating the third stage is performed by injecting fuel upstream of the second stage and downstream of the first stage. 11. The method of claim 1, wherein the third stage is regenerated by one or more of the following operations: intake throttling, increased exhaust gas recirculation, or post-combustion fuel injection. 12. The method of claim 1, wherein the first stage and second stage form a continuously regenerating carbon trap. 13. The method of claim 1, wherein regenerating the third stage is performed by increasing carbon monoxide at the third stage. 14. The method of claim 1, further comprising the step of continuously regenerating the second stage. 15. The method of claim 14, wherein the step of continuously regenerating is in response to monitoring the balance point temperature at the second stage. 16. The method of claim 14, wherein the regenerating is performed by adjusting the air-fuel ratio in the exhaust.