Method for controlling the heating of an electrically heatable c

Details Method for controlling the heating of an electrically heatable c Method for controlling the heating of an electrically heatable c

1995-06-02

1996-12-31

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60297, 60300, F01N 320

Patent

active

055882919

ABSTRACT:
A catalytic converter is connected downstream of an internal combustion engine of a motor vehicle and has at least a short portion to be quickly electrically heated. A method for controlling the heating of the catalytic converter includes turning on electric heating only after a delay after starting the internal combustion engine, if a rate of temperature change in the heatable portion of the catalytic converter, being caused by heat contained in exhaust gases of the internal combustion engine, is no greater than approximately a rate of temperature change attainable by electric heating.

REFERENCES:
patent: 2942932 (1960-06-01), Elliott
patent: 3957444 (1976-05-01), Goto
patent: 5146743 (1992-09-01), Maus et al.
patent: 5315824 (1994-05-01), Takeshima
patent: 5339628 (1994-08-01), Maus
Patent Abstracts of Japan, vol. 131, No. 89, May 8, 1989 & JP-87-0170487 (Yanmar) Jul. 8, 1987.

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