Catalyst temperature control apparatus for hybrid vehicle

Details Catalyst temperature control apparatus for hybrid vehicle Catalyst temperature control apparatus for hybrid vehicle

1999-04-23

2000-05-09

Mar, Michael

Motor vehicles

Power

Electric

180309, 60286, 701103, B60K 100

Patent

active

060590572

ABSTRACT:
In an engine mounted on a hybrid vehicle, even in an atmosphere that readily cools down a catalyst by relatively low-temperature gaseous exhausts, for example, under a fuel cut control, the structure of the invention quickly warms up the catalyst and maintains a conversion efficiency of the gaseous exhausts at a high level. When it is determined that an engine is in operation and the fuel cut control is being performed, a reflux valve is turned on to reflux the gaseous exhausts into an intake conduit. This control procedure enables the relatively low-temperature gaseous exhausts to be refluxed to the intake conduit, instead of flowing into the catalyst, thereby preventing the catalyst from being cooled down.

REFERENCES:
patent: 5172550 (1992-12-01), Takeshima
patent: 5201173 (1993-04-01), Fujimoto et al.
patent: 5265418 (1993-11-01), Smith
patent: 5323868 (1994-06-01), Kawashima
patent: 5385017 (1995-01-01), Harada
patent: 5398502 (1995-03-01), Watanabe
patent: 5492190 (1996-02-01), Yoshida
patent: 5566774 (1996-10-01), Yoshida

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