Mitsubishi Fuso Truck & Bus Corporation

Mitsubishi Fuso and Bus Corporation

Minehiro Murata

Yoshinaka Takeda

Satoshi Hiranuma

Hiroaki Fujita

Satoshi Yamazaki

Shinichi Saito

Yoshinori Takahashi

Nobuhiro Kondo

Yasuko Suzuki

Yusuke Horii

Yasuhiro Tsutsui

Goro Iljima

An ammonia selective reduction-type NOx catalyst () is interposed in an exhaust passage of an engine () provided in a series-type hybrid electric vehicle (), and a urea water injector () is disposed in the exhaust passage to supply a urea water into exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst (). The engine () is started and stopped in accordance with the storage state of a battery (), and the urea water injector () is controlled in accordance with the operating state of the engine (). When the engine () is to be stopped, an adsorption increasing operation for increasing the amount of ammonia adsorbed by the ammonia selective reduction-type NOx catalyst () is executed over a predetermined period before the engine () is stopped.

Exhaust purification device for hybrid electric vehicle

An exhaust purification apparatus for an engine comprises an upstream casing that has a cylindrical shape and accommodates a particulate filter; an exhaust gas outlet that is formed in a side wall of the upstream casing and discharges the exhaust gas that has passed through the particulate filter; a urea-water injector that is fixed to the upstream casing located in a position opposite to the exhaust gas outlet and injects urea-water toward the exhaust gas outlet; and a downstream casing that accommodates an ammonia selective reduction-type NOx catalyst into which the exhaust gas discharged from the exhaust gas outlet flows.

Exhaust purification apparatus for engine

An exhaust purification apparatus comprises an ammonia selective reduction-type NOx catalyst that selectively reduces NOx within exhaust gas by using ammonia as a reducing agent, a urea-water supply device that supplies urea-water into the exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst, and a control unit. The control unit controls the urea-water supply device so that the urea-water is intermittently supplied according to predetermined supply duration time and predetermined supply suspension time when the urea-water is supplied from the urea-water supply device for the purpose of providing ammonia to the ammonia selective reduction-type NOx catalyst.

An engine control system includes an EGR devicewhich connects an exhaust passage Ex and an intake passage I and has an EGR valve; an intake throttle valveplaced in the intake passage I; and an engine control unit which is provided with an engine operation data calculator Aaccumulating mileages of a vehicle or an engine operation period, a fuel injection controller Acontrolling a fuel injection amount and a fuel injection timing, an EGR controller Acontrolling an opening of the EGR valve; a throttle valve controller Acontrolling an opening of the intake throttle valve; and an EGR passage cleaning controller Awhich delays a fuel injection timing Tn, increases an opening &#x3b2; g of the EGR valve, and reduces an opening &#x3b8; s of the intake throttle valve when the total mileage or the total operation period calculated by the engine operation data calculator becomes equal to a predetermined threshold.

Engine control system

Growing community of inventors

Kawasaki, Japan

Minehiro Murata