Air-fuel ratio control system for internal combustion engine

Details Air-fuel ratio control system for internal combustion engine Air-fuel ratio control system for internal combustion engine

1993-01-26

1994-10-11

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123697, F02D 4114, G01N 2726

Patent

active

053537750

ABSTRACT:
An engine temperature is measured an opening of a door is detected so an electrical conduction is made to a heater for heating a sensor element by setting a target element temperature to a relatively high level if such engine temperature (cooling water temperature Thw) is relatively low or, on the other hand, by setting the target element temperature to a relatively low level if the cooling water temperature is relatively high. Then the element temperature is detected and the heater is turned off when the element temperature has reached the target temperature.

REFERENCES:
patent: 4993392 (1991-02-01), Tanaka et al.
patent: 5148795 (1992-09-01), Nagai et al.
patent: 5156044 (1992-10-01), Benninger et al.
W. A. Whittenberger et al, "Recent Developments in Electrically Heated Metal Monoliths" SAE No. 900503 pp. 61-70, Feb. 1990.

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