Method of monitoring a secondary air pump

Details Method of monitoring a secondary air pump Method of monitoring a secondary air pump

1997-06-26

1999-07-13

Denion, Thomas E.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60287, 60289, 60290, 60307, F01N 300

Patent

active

059210770

ABSTRACT:
A secondary air pump communicates through an air duct with an exhaust gas line of an internal combustion engine. A catalytic converter for cleaning exhaust gas is connected in the exhaust gas line. The secondary air mass pumped by the secondary air pump is measured with an air flow rate meter. A control unit compares the measured secondary air mass with the desired secondary air mass set by the control unit. If the measured secondary air mass differs from the set secondary air mass by more than a specified amount, then the control unit has detected a malfunction.

REFERENCES:
patent: 5060474 (1991-10-01), Aramaki
patent: 5381658 (1995-01-01), Meguro
patent: 5526642 (1996-06-01), Dambach et al.
patent: 5560199 (1996-10-01), Agustin et al.
patent: 5615552 (1997-04-01), Shimasaki et al.
Japanese Patent Abstracts No. 6129244 (Motokatsu et al.), dated May 10, 1994.

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