Ud Trucks Corporation

Yasuyoshi Tomita

Kiyoshi Fukuda

An exhaust gas purification apparatus includes: a reduction catalyst converter that reduces and purifies nitrogen oxides in exhaust gas; a tank that stores a liquid reducing agent or precursor thereof; and an injection nozzle that injects the liquid reducing agent or precursor thereof stored in the tank on an exhaust gas upstream side of the reduction catalyst converter. Some of the exhaust gas flowing through an exhaust pipe is diverted to the tank by a bypass pipe, to cause an exchange of heat between the diverted exhaust gas and the liquid reducing agent or precursor thereof stored in the tank, thereby thawing the liquid reducing agent or precursor thereof frozen in the tank.

Exhaust gas purification apparatus, and method for thawing liquid reducing agent or precursor thereof

A pumping device having an identifying function is provided to allow cost reduction. A return channel and a delivery channel of a pump are connected to a suction tube equipped with a flowmeter, a return tube is connected to the return channel, a solenoid valve is disposed between the suction tube and the delivery channel, and a control unit identifying a fluid by a flow velocity difference of the flowmeter is disposed. The solenoid valve closes the delivery channel when a fluid flows in, the flowmeter measures a flow rate of a fluid sucked through the suction tube, and the fluid is returned to the return tube via the return channel. The control unit opens the solenoid valve to supply the fluid also to the delivery channel when it is identified that a fluid is an intended fluid.

Growing community of inventors

Ageo, Japan

Yasuyoshi Tomita