Engine air/fuel ratio sensing device

Details Engine air/fuel ratio sensing device Engine air/fuel ratio sensing device

1985-02-04

1986-09-02

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 204412, 204426, G01N 2746

Patent

active

046094520

ABSTRACT:
An engine air/fuel ratio sensing device for measuring the oxygen partial pressure or concentration in the exhaust gas of an engine. The device has a sensor and a control circuit coupled to each other. The sensor consists of an electrolyte oxygen pump cell and an electrolyte oxygen sensor cell, both cells having a gap portion therebetween. The control circuit provides a pumping current through a current limiting resistor to the pump cell and measures two terminal voltages across the current limiting resistor to derive the actual pump current and the internal resistance of the pump cell, the latter being converted into the actual temperature to which the sensor is exposed. The actual pump current and the actual temperature are used to correct the actual pump current to a proper pump current dependent on the temperature, in accordance with a predetermined equation.

REFERENCES:
patent: 4167163 (1979-09-01), Moder
patent: 4272329 (1981-06-01), Hetrick et al.
patent: 4366039 (1982-12-01), Uchida et al.
patent: 4419190 (1983-12-01), Dietz et al.
patent: 4450065 (1984-05-01), Yamada et al.
patent: 4464244 (1984-08-01), Uchida et al.
patent: 4472262 (1984-09-01), Kondo et al.
patent: 4498968 (1985-02-01), Yamada et al.

Affiliated with

Also associated with

Rating

Engine air/fuel ratio sensing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Engine air/fuel ratio sensing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine air/fuel ratio sensing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1096071