Method of and device for controlling the burn-off of a measuring

Details Method of and device for controlling the burn-off of a measuring Method of and device for controlling the burn-off of a measuring

1985-03-19

1986-04-01

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

73 35, F02P 1700, F02P 1902

Patent

active

045790981

ABSTRACT:
Disclosed is a method of and a device for controlling a burn-off function of a measuring resistor, particularly heated wire or heated film in an air flow sensor of an internal combustion engine. The burn-off operation for fast cleaning the measuring resistor is normally made either periodically or in response to preset operational conditions of the engine. The invention interrupts this burn-off function when detrimental operational condition of the engine depending on the rotary speed has occurred. The stoppage of the burn-off function preferably occurs after a simultaneous detection of a predetermined temperature value detected by a sensor.

REFERENCES:
patent: 3533381 (1970-10-01), Schmid et al.
patent: 3796198 (1974-03-01), Mauch et al.
patent: 4058089 (1977-11-01), Schmidt et al.
patent: 4334186 (1982-06-01), Sasayama et al.
patent: 4397283 (1983-08-01), Komaroff et al.

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