Isuzu Motors Limited

Shigeru Nihongi

Masanobu Minezawa

Hirotaka Takahashi

Shigeo Sekiyama

Takeshi Fukuoka

Sadatoshi Mogami

Kouichi Takahashi

Yutaka Suzuki

A selective catalytic reduction system includes a selective catalytic reduction device on an exhaust pipe of an engine, a urea solution tank that stores a urea solution, a float-type urea solution level sensor in the urea solution tank, a dosing valve on the exhaust pipe upstream of the selective catalytic reduction device, a urea solution injection control section that controls an amount of urea solution to be injected through the dosing valve in accordance with an amount of NOx discharged from the engine, an inclination sensor that detects an inclination angle of the urea solution tank relative to horizontal, and an inclination angle correcting section that corrects a liquid level of the urea solution, the liquid level being detected by a detection unit from the position of a float, with the inclination angle detected by the inclination sensor.

Selective catalytic reduction system, selective catalytic reduction sensor, and level sensor

A clogging detection device includes a urea water sensor which detects temperature in a urea water tank, a pressure sensor which detects pressure in a urea water feed line, an exhaust gas temperature sensor disposed in an exhaust pipe upstream of a selective catalytic reduction device, and a determination unit. When a key switch is turned on, the determination unit performs a startup control to drive a supply pump and increase the pressure in a pipe segment extending to a dosing value. If a detection value of the exhaust gas temperature sensor is no greater than a predetermined temperature, and a detection value of the urea water sensor is no smaller than a freezing temperature, then the determination unit performs emptying control for returning the urea water from the pipe segment to the urea water tank to detect clogging of the pipe segment from the detection value of the pressure sensor.

Urea water pipe clogging detection device for urea selective catalytic reduction

A turbo compound engine is provided with a rotor which is connected to the engine's output shaft so as to deliver working medium, such as intake air or exhaust gas or a mixture of the two, and a bypass line that bypasses the rotor, so that it not only utilizes the compression work and delivery work the rotor performs for a part of the braking force in the event of engine braking, but also attains a rapid and smooth increase in engine power output by allowing the working medium to bypass the rotor for a while when the engine operation mode is shifted from rotor-assisted engine brake mode to rotor-assisted engine drive mode for acceleration.

Turbo compound engine

Growing community of inventors

Yokohama, Japan

Shigeru Nihongi