Device for diagnosis of a tank ventilation system of a vehicle

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

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123198D, F02M 3304, G01M 1500

Patent

active

061127280

ABSTRACT:
A device for diagnosis of a tank ventilation system of a vehicle, including a tank, an adsorption filter that communicates with the tank by way of a tank connection line and has a ventilation line, a tank ventilation valve that communicates with the adsorption filter by way of a valve line, and an on-board pressure source, by means of which the tank ventilation system can be acted upon with a pressure. A shut-off device is provided that only opens when the tank ventilation system is acted on with pressure by means of the on-board pressure source and closes when the tank ventilation system is acted on with pressure by means of a pressure source connected externally for the purpose of functionality testing.

REFERENCES:
patent: 5297529 (1994-03-01), Cook et al.
patent: 5347971 (1994-09-01), Kobayashi et al.
patent: 5349935 (1994-09-01), Mezger
patent: 5511529 (1996-04-01), Blumenstock et al.
patent: 5767395 (1998-06-01), Goto et al.
patent: 5829416 (1998-11-01), Teraoka et al.
patent: 5967124 (1999-10-01), Cook et al.

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