Arrangement for the detection of deficiencies in a tank ventilat

Details Arrangement for the detection of deficiencies in a tank ventilat Arrangement for the detection of deficiencies in a tank ventilat

1990-07-26

1992-02-04

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123516, 123518, F02M 3302

Patent

active

050851977

ABSTRACT:
With the present tank ventilation system formed of a fuel tank, an active carbon filter, a control unit, a lambda probe, a tank ventilation valve and a flow sensor it is possible to recognize defects at the connecting lines and the ventilation valve immediately. For the recognition of the defect, a control unit is provided which examines the signals arriving from the lambda probe and from the flow sensor along with the outgoing tank ventilation control signals for unreasonable events. When a defect is recognized, the error signal is stored. A ceramic PTC resistor is preferably employed as the flow sensor.

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