Title:
触媒の暖機制御装置
Document Type and Number:
Japanese Patent JP4656193
Kind Code:
B2
Abstract:
A catalyst is provided in an exhaust passage of an engine and an evaporating section of a heat recovery device is provided upstream of the catalyst in the exhaust passage. An ECU performs an operation for compulsorily oscillating an air-fuel ratio between a lean state and a rich state as compared to a theoretical air-fuel ratio when temperature of the catalyst reaches temperature at which the catalyst has a predetermined purification capacity after the engine is started. The ECU restricts a flow of a working fluid in the heat recovery device until the temperature of the catalyst reaches the temperature at which the catalyst has the predetermined purification capacity after the engine is started.
Inventors:
Nobuaki Ikemoto
Application Number:
JP2008157373A
Publication Date:
March 23, 2011
Filing Date:
June 17, 2008
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F01N3/24; B01D53/94; F01N3/20; F01N5/02; F02G5/02
Domestic Patent References:
| JP2005016364A | ||||
| JP2003269146A | ||||
| JP2000054837A | ||||
| JP2007154717A |
Attorney, Agent or Firm:
Tsuyoshi Yamada
Yasunari Kurita
Kyoko Hino
Satoru Ando
Yasunari Kurita
Kyoko Hino
Satoru Ando