Air/fuel ratio detecting apparatus for internal combustion engin

Details Air/fuel ratio detecting apparatus for internal combustion engin Air/fuel ratio detecting apparatus for internal combustion engin

1986-09-15

1988-06-21

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

73 23, 123589, F02D 4114, G01N 3122

Patent

active

047519070

ABSTRACT:
In an A/F ratio sensor of mixture supplied for an internal combustion engine, which has a detector for detecting the concentration of residual oxygen in exhaust gas and determines the A/F ratio by retrieving an air excess ratio table with an output of the detector, there is further provided an additional air introducing device, which introduces a predetermined quantity of air into the engine for a certain period of time, under the condition that the velocity of air flowing through a throttle valve is equal to the sonic velocity. The oxygen concentration detector is calibrated by the comparison of the outputs thereof before and after introduction of the additional air. According to this invention, the A/F ratio of the mixture can be detected accurately without the influence of the aged deterioration of the oxygen concentration.

REFERENCES:
patent: 4303049 (1981-12-01), Ikeura et al.
patent: 4391130 (1983-07-01), Nakano et al.
patent: 4502444 (1985-03-01), Rubbo et al.

Affiliated with

Also associated with

Rating

Air/fuel ratio detecting apparatus for internal combustion engin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air/fuel ratio detecting apparatus for internal combustion engin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air/fuel ratio detecting apparatus for internal combustion engin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-924855