Trouble warning device for an air-fuel ratio sensor

Details Trouble warning device for an air-fuel ratio sensor Trouble warning device for an air-fuel ratio sensor

1978-02-01

1980-01-08

Lazarus, Ira S.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

123 32EE, 123119EC, F02B 7708

Patent

active

041823001

ABSTRACT:
Disclosed is a trouble warning device for an air-fuel ratio sensor mounted in an internal combustion engine. The trouble warning device comprises a comparator which compares the output voltage level of the air-fuel ratio sensor with a reference voltage whose level is higher than the output voltage level of the normally operating air-fuel ratio sensor and an indicator to give warning of trouble in response to the compared result. By using this trouble warning device, correct detection of trouble and reliable warning of trouble in the air-fuel ratio sensor can be obtained.

REFERENCES:
patent: 3903853 (1975-09-01), Kizler
patent: 3948228 (1976-04-01), Luchaco
patent: 3962866 (1976-06-01), Neidhard et al.
patent: 4007589 (1977-02-01), Neidhard et al.
patent: 4027477 (1977-06-01), Storey
patent: 4029061 (1977-06-01), Asano
patent: 4057042 (1977-11-01), Aono

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