Method for monitoring the functional capability of a tank ventin

Details Method for monitoring the functional capability of a tank ventin Method for monitoring the functional capability of a tank ventin

1995-08-03

1996-11-12

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123520, B60K 1503, G01M 1500, F02D 4114

Patent

active

055729819

ABSTRACT:
A method for monitoring functional capability of a tank venting system for a motor vehicle, includes evacuation of the tank venting system through the use of negative pressure or vacuum prevailing in the suction tube of an internal combustion engine and assessing the system based on negative pressure buildup and negative pressure letup gradients. Additionally, besides other abnormal termination criteria, the dynamics of pressure changes are also monitored and the method is immediately discontinued, if pressure fluctuations are ascertained which exceed a predetermined measure.

REFERENCES:
patent: 5193512 (1993-03-01), Steinbrenner et al.
patent: 5195498 (1993-03-01), Siebler et al.
patent: 5339788 (1994-08-01), Blumenstock et al.
patent: 5347971 (1994-09-01), Kobayashi et al.
patent: 5353771 (1994-10-01), Blumenstock et al.
patent: 5355863 (1994-10-01), Yamanaka et al.
patent: 5445015 (1995-08-01), Namiki et al.
patent: 5463998 (1995-11-01), Denz et al.
patent: 5490414 (1996-02-01), Durschmidt et al.

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