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Patent Searching and Data


Title:
ENGINE EXHAUST-GAS PURIFICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/125869
Kind Code:
A1
Abstract:
An engine (1) is provided with: a urea water injector (40) which is provided to an exhaust pipe (30) of the engine (1) provided to a vehicle, and which supplies urea water into the exhaust pipe (30) by way of injection; selective reduction-type catalysts (34) which are provided to the exhaust pipe (30) at a downstream side of the urea water injector (40), and which use the urea water supplied by the urea water injector (40) to reduce and purify nitrogen oxide included in exhaust gas inside the exhaust pipe (30); and a low-pressure exhaust-gas recirculation passage (45) in which exhaust gas from the exhaust pipe (30) at an upstream side of the selective reduction-type catalysts (34) is introduced and recirculated into an air inlet pipe (20) of the engine (1). In said engine (1), when an exhaust-gas recirculation valve (48) for opening and closing the low-pressure exhaust-gas recirculation passage (45) is switched from a closed state into an open state, supply of the urea water by the urea water injector (40) by way of injection is suspended.

Inventors:
TSUNEKAWA, Kiyoka (33-8 Shiba 5-chome, Minato-k, Tokyo 10, 〒1088410, JP)
Application Number:
JP2014/050800
Publication Date:
August 21, 2014
Filing Date:
January 17, 2014
Export Citation:
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Assignee:
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA (33-8, Shiba 5-chome Minato-k, Tokyo 10, 〒1088410, JP)
International Classes:
F01N3/08; F01N3/24; F02D21/08
Foreign References:
JP2008064063A2008-03-21
JP2008291671A2008-12-04
JP2005016495A2005-01-20
JP4730336B22011-07-20
Other References:
See also references of EP 2957738A4
Attorney, Agent or Firm:
AIHARA, Shiro (Hyakuraku Bldg, 8-1 Shinbashi 5-chome, Minato-k, Tokyo 04, 〒1050004, JP)
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