Waseda University

Ud Trucks Corporation

Tokyo Roki Co., Ltd.

Keishi Takada

Kiminobu Hirata

Nobuhiko Masaki

Isamu Kanaya

Jin Kusaka

Takayuki Adachi

Takeshi Mende

Fumiyuki Tsurumi

An exhaust gas pressure P, exhaust gas temperatures Tand Ton upstream and downstream of a DPF, a rotation speed Ne, a load Q, and an intake flow rate F as various operating conditions are read, and an amount of PM generated for short time &#x394;t is obtained to be added to a PM deposited amount m, and thus, to obtain an initial deposited amount. Exhaust gas properties and a space velocity SV are obtained based on various operating conditions, and the PM deposited amount m after a lapse of the short time &#x394;t is estimated from a PM deposited amount estimation equation 'm=m&#xb7;exp(&#x2212;B&#xb7;&#x394;t)' having been derived considering the exhaust gas properties and the space velocity SV. When the PM deposited amount m is equal to or more than a predetermined value, a forced regeneration processing in the DPF is executed, and thereafter, the PM deposited amount m is reset to 0.

Apparatus for and method of purifying exhaust gas

Growing community of inventors

Tokyo, Japan

Keishi Takada