Hot-wire air flowmeter control system for engine

Details Hot-wire air flowmeter control system for engine Hot-wire air flowmeter control system for engine

1984-06-15

1985-03-19

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123494, 123488, 123518, 123520, F02M 3302

Patent

active

045052484

ABSTRACT:
In an internal combustion engine provided with a hot-wire air flowmeter and a canister for supplying fuel evaporated from a fuel tank into an intake passage, there exists a state where an excessively-rich mixture is supplied from the canister to the intake passage because of trouble of the canister and therefore engine stops. If the hot wire is heated in such a state as described above for removal of contaminations sticked onto the hot wire after an ignition switch has been turned off, there exists a problem such that rich mixture may be fired by the heated hot wire. To overcome this problem, an engine stop detecting means is additionally provided in order to inhibit the hot-wire from being heated up when the ignition switch is turned off after engine stop. That is, the hot wire is heated only when the engine is running before the ignition switch is turned off.

REFERENCES:
patent: 4013054 (1977-03-01), Balsley
patent: 4089214 (1978-05-01), Egami
patent: 4334186 (1982-06-01), Sasayama
patent: 4343281 (1982-08-01), Uozumi
patent: 4446838 (1984-05-01), Suzuki
patent: 4448172 (1984-05-01), Kashiwaya

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