06370870 is referenced by 64 patents and cites 1 patents.

A nitrogen oxide absorbing material (

38

) which absorbs nitrogen oxide when the reduction component concentration of exhaust gas in the exhaust passage (

31

) of an engine (

1

) is lower than a predetermined concentration, and discharges nitrogen oxide when the reduction component concentration of exhaust gas in the exhaust passage (

31

) of the engine (

1

) is higher than the predetermined concentration, and a catalyst (

38

) which promotes reduction of the discharged nitrogen oxides by a reduction component are provided. A controller (

40

) first reduces the reduction component concentration of the exhaust gas over a first predetermined time period by, for example, advancing the fuel injection timing. The controller (

40

) then increases the reduction component concentration of the exhaust gas over a second predetermined time period by, for example, retarding the fuel injection timing.

Title
Exhaust gas purifying device
Application Number
9/417012
Publication Number
6370870 (B1)
Application Date
October 12, 1999
Publication Date
April 16, 2002
Inventor
Yasuhisa Kitahara
Yokohama
US
Motohiro Shinzawa
Yokosuka
US
Jyunji Itou
Yokohama
US
Hiroshi Akama
Zushi
US
Maki Kamikubo
Yokosuka
US
Motohisa Kamijo
Yokohama
US
Agent
Foley & Lardner
US
Assignee
Nissan Motor
US
IPC
F01N 3/00
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