EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Japanese Patent JP3550215

B2

PURPOSE: To restrain wastefuel energy consumption by controlling the generating voltage of an alternator in response to the detected operating condition of an engine by supplying electric power from the alternator to an electric-heating type catalyst.
CONSTITUTION: Whether or not an ignition switch is turned on is judged, and when it is turned on, the detection values of an engine water temperature(TW) and an intake air temperature(TA) are read, and a TON, VEHC map determined in accordance with the TW, TA values is retrieved, and the energizing time of a heater resistance 24 and the supply voltage VEHC to an electric-heating type catalyst(EHC) are set for carrying out control. Then, it is discriminated whether or not an engine speed NE exceeds a prescribed speed NEK for judging perfect explosion, and when NE≥NEK, a changeover switch 23 is changed over to the side of a terminal 23c, and the output voltage of an alternator 21 is controlled so as to attain the previously set VEHC value for supplying electric power to the EHC. After the lapse of energizing time, the output voltage of the alternator 21 is reduced to the normal output voltage, and the changeover switch 23 is changed over to the side of the terminal 23b.

Yuichi Shimazaki
Akihisa Saito
Takayoshi Nakayama
Satoshi Teshiroki
Takuya Aoki
Hiroaki Kato
Taku Komatsuda
Hideo Furumoto

JP12064895A

August 04, 2004

April 21, 1995

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Honda motor industry stock company

F01N3/20; F01N3/24; F01N9/00; (IPC1-7): F01N3/20; F01N3/24

JP5312029A
JP4279718A
JP8239013A
JP8218855A
JP7063046A

Toshihiko Watanabe

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