Method and apparatus for detecting abnormal state of evaporative

Details Method and apparatus for detecting abnormal state of evaporative Method and apparatus for detecting abnormal state of evaporative

1991-06-26

1993-04-20

Miller, Carl Stuart

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123520, F02M 3900

Patent

active

052038700

ABSTRACT:
In an evaporative emission-control system having a canister for trapping a fuel-vapor evaporated from the fuel tank and a purge control valve for executing a purging, an amount of fuel-vapor trapped in the canister is measured while the engine is stopped or in an idle state. The trapped fuel-vapor is purged from the canister and mixed with an air-fuel mixture when the amount of fuel-vapor trapped in the canister is sufficient for diagnosis while the vehicle is running in a predetermined driving condition. In this purge operation, a concentration of a vapor-laden air from the canister is measured and the occurrence of an abnormal state of the evaporative emission-control system is determined when a change of the concentration of the vapor-laden air after the purging is less than a predetermined value.

REFERENCES:
patent: 4318383 (1982-03-01), Iritani et al.
patent: 4338905 (1982-07-01), Urich
patent: 4671107 (1987-06-01), Chiesa et al.
patent: 4846135 (1989-07-01), Tiphaine
patent: 4867126 (1989-09-01), Yonekawa et al.
patent: 4901702 (1990-02-01), Beicht
patent: 4949695 (1990-08-01), Uranishi
patent: 4962744 (1990-10-01), Uranishi et al.
patent: 5021071 (1991-06-01), Reddy
patent: 5067469 (1991-11-01), Hamburg

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