Secondary air pump control system for internal combustion engine

Details Secondary air pump control system for internal combustion engine Secondary air pump control system for internal combustion engine

1995-08-02

1997-04-01

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

60289, F01N 332

Patent

active

056155522

ABSTRACT:
A secondary air pump control system for an internal combustion engine having an air pump for supplying secondary air to the exhaust passage, comprises a voltage detector for detecting voltage applied to the air pump, a current detector for detecting current flowing through the air pump, and a switch for making a changeover between supply of electric power to the air pump and cutoff of same. The flow rate of secondary air supplied by the air pump is detected based on an output from the voltage detector and an output from the current detector. The operation of the switch is controlled based on the flow rate thus detected.

REFERENCES:
patent: 5140810 (1992-08-01), Kuroda
patent: 5333446 (1994-08-01), Itoh
patent: 5381658 (1995-01-01), Meguro
patent: 5388401 (1995-02-01), Nishizawa
patent: 5400591 (1995-03-01), Aramaki
patent: 5519992 (1996-05-01), Hosoya

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