Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1984-08-15
1986-01-28
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, 204 1T, 204424, F02B 300, G01N 2758
Patent
active
045664196
ABSTRACT:
A gas sensor of constant-current type is used to detect a gas component in exhaust gases from an internal combustion engine so as to perform feedback control of air/fuel ratio of an air-fuel mixture supplied to the engine. In order to detect an air/fuel ratio which is richer than a stoichiometric value, a voltage applied to the gas sensor is set to a high value so that the gas sensor does not exhibit a constant-current characteristic. In the case it is desired to detect an air/fuel ratio which is either richer or leaner than the stoichiometric value, the voltage may be changed between the high value and a lower value at which the gas sensor exhibits a constant-current characteristic. Engine parameters are detected to determine whether the engine requires a rich mixture or a lean mixture, and the voltage may be changed as the result of such determination. An output current of the gas sensor is detected to ascertain air/fuel ratio so that air/fuel ratio is controlled to a desired value suitable for engine operating condition.
REFERENCES:
patent: 4156404 (1979-05-01), Anzas
patent: 4170965 (1979-10-01), Aono
patent: 4208993 (1980-06-01), Peter
patent: 4214563 (1980-07-01), Hosaka
patent: 4226221 (1980-10-01), Asano
patent: 4237829 (1980-12-01), Asano et al.
patent: 4332225 (1982-06-01), Cox et al.
patent: 4344317 (1982-08-01), Hattori et al.
patent: 4354468 (1982-10-01), Sone et al.
patent: 4355618 (1982-10-01), Muller et al.
patent: 4356065 (1982-10-01), Dietz
patent: 4359030 (1982-11-01), Sone et al.
patent: 4430976 (1984-02-01), Kondo et al.
Fujisawa Hideya
Ninomiya Masakazu
Omori Norio
Suzuki Atsushi
Nelli Raymond A.
Nippondenso Co. Ltd.
LandOfFree
Apparatus and method for controlling air-to-fuel ratio for an in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling air-to-fuel ratio for an in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling air-to-fuel ratio for an in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1300603