Ud Trucks Corporation

Tomoyuki Takeda

Masakazu Yano

Takafumi Amano

Tomofumi Nakashima

Based on a fuel supplying amount in accordance with an engine operating condition, a discharge amount of a predetermined fuel component contained in exhaust gas to be discharge per unit time is estimated, and integrated by an accumulation amount of the fuel component accumulated in an exhaust purification element. Furthermore, according to an exhaust gas temperature that flows into the element, an amount of the fuel component to be removed from the element per unit time is estimated, and the amount is subtracted from the accumulation amount. When the accumulation amount is equal to or greater than a predetermined value, a determination is made that a timing to forcefully remove the fuel component accumulated in the element has arrived. Then, an alarming lamp is lightened, and a forceful removing processing is performed by raising a temperature of the exhaust gas above a temperature at which the fuel component is removed.

Growing community of inventors

Ageo, Japan

Tomoyuki Takeda