EXHAUST GAS CLEANING SYSTEM FOR INTERNAL COMBUSTION ENGINE AND EXHAUST GAS CLEANING METHOD FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2015/198823

A1

An exhaust gas cleaning system for an internal combustion engine is provided with, in an exhaust passage (15) of an internal combustion engine (10) and in order from an upstream side: a hydrocarbon supply means (32); an upstream side catalyst unit (31a) of an oxidation catalyst, a NOx reduction catalyst, or the like; and a catalyst-equipped fine particle collection filter (31b) having a hydrocarbon adsorption function, wherein when a vehicle on which the engine (10) is mounted accelerates after driving for a preset set time period (ta) at a temperature (Tg1) of exhaust gas (G) equal to or less than a preset set exhaust gas temperature (T0), the supply of hydrocarbon into the exhaust gas (G) is started when an exhaust gas temperature (Tg) becomes equal to or more than a preset first set temperature (T1), and the supply of hydrocarbon is terminated when a preset termination condition is satisfied. As a result, when the vehicle is accelerated from steady driving in a low-speed, low-load operation state in which the temperature (Tg1) of the exhaust gas (G) is low, and a NOx generation amount is temporarily increased, the amount of NOx emitted from the internal combustion engine (10) is reduced.

NAGAOKA DAIJI (JP)
GABE MASASHI (JP)

PCT/JP2015/066189

December 30, 2015

June 04, 2015

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ISUZU MOTORS LTD (JP)

F01N3/24; F01N3/08; F01N3/36; F02D41/10

JP2004150296A	2004-05-27
JPH06257487A	1994-09-13
JP2010007524A	2010-01-14
JPH11324661A	1999-11-26
JP2007505264A	2007-03-08

See also references of EP 3159509A4

Seiryu Patent Professional Corporation et al. (JP)
Clear stream international patent business corporation (JP)

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