Isuzu Motors Limited

Shin Amagasaki

Tatsuo Mashiko

Masanobu Minezawa

Yasuhisa Oomura

Kazuhiro Kodaira

Akihiro Tozuka

Takuya Mito

An exhaust purification system that includes a selective catalytic reduction to purify NOx contained in an exhaust gas by using ammonia produced from urea water and an NOx sensor to acquire a value of the NOx contained in the exhaust gas, and the exhaust purification system includes: a reach time measurement unit that measures a reach time of the NOx value acquired by the NOx sensor, the reach time being a required time for the NOx value to reach, from a first predetermined determinative NOx value, a second predetermined determinative NOx value, which is higher than the first determinative NOx value; and a determination unit that determines that malfunction occurs in the NOx sensor when the reach time measured by the reach time measurement unit is equal to or shorter than a first predetermined determinative time.

Exhaust purification system

Provided is a breather pipe structure for a liquid reducing agent storage tank which ensures that a liquid reducing agent can be supplied without trouble even if a breather pipe in the liquid reducing agent storage tank is clogged with frozen liquid reducing agent. In a breather pipe structure for a liquid reducing agent storage tank () which stores a liquid reducing agent () and which has a breather pipe () for introducing/discharging air attached on top of the liquid reducing agent storage tank (), a lower end () of the breather pipe () in the liquid reducing agent storage tank () is arranged to extend along a liquid reducing agent defrosting piping () provided in the liquid reducing agent storage tank ().

Breather pipe structure for liquid reducing agent storage tank

Growing community of inventors

Fujisawa, Japan

Shin Amagasaki