Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters
Patent
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.
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Kayanuma Nobuaki
Otsuka Takayuki
Uchida Kenichi
Miller Carl Stuart
Toyota Jidosha & Kabushiki Kaisha
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