G - Physics – 01 – F
Patent
G - Physics
01
F
354/24, 123/61
G01F 9/00 (2006.01) F02D 35/00 (2006.01) F02D 41/00 (2006.01) F02D 41/14 (2006.01) G01N 27/406 (2006.01)
Patent
CA 1256998
- 1 - Abstract In an A/F ratio sensor of the mixture supplied to an internal combustion engine has a detector for detecting the concentration of residual oxygen in the exhaust gas. The apparatus determines the A/F ratio by retrieving an air excess ratio table with an output of the detector. A device introduces a predetermined quantity of additional air into the engine for a certain period of time, with the velocity of air flowing through the throttle valve being equal to the sonic velocity. The oxygen concentration detector is calibrated by a comparison of the outputs thereof before and after introduction of the additional air. In this manner the A/F ratio of the mixture can be detected accurately without being influenced by any age deterioration of the oxygen concentration detector.
519204
Ohgane Hiroaki
Ohnishi Eiichi
Ohsuga Minoru
Ohta Tadaki
Oyama Yoshishige
Hitachi Ltd.
Kirby Eades Gale Baker
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