G - Physics – 05 – D
Patent
G - Physics
05
D
340/73, 341/38.1
G05D 7/06 (2006.01) F02D 41/04 (2006.01) F02D 41/14 (2006.01) G05D 11/13 (2006.01)
Patent
CA 1143454
CLOSED LOOP SENSOR CONDITION DETECTOR ABSTRACT OF THE DISCLOSURE An electronic control unit for regulating the air/fuel ratio of an internal combustion engine is disclosed. The electronic control unit has an open loop calibration for regulating air/fuel ratio that is corrected with a closed loop signal developed by an inte- gral controller. The integral controller bases the closed loop correction signal on a signal from an exhaust gas composition sensor located in the engine exhaust manifold. Various conditions of the system are sensed by a closed loop sensor condition detector to provide information on whether the sensor is up to operating temperature and is operative. If the exhaust gas sensor is functioning and the operating system parameters indicate the system opera- tion should move to closed loop control, the loop is closed by the condition detector. Included in the condi- tion detector circuit is a timer whose cycle is RPM depen- dent. The timer will time out if the sensor has not indi- eated an operational capability in one timing cycle or a set number of RPM counts and will generate a signal indi- eating a sensor failure. After closing the loop, the detector circuit will check for a sensor transition on a periodic basis related to the authority of the integral controller and provide a signal to open the closed loop if the transition does not occur. A rich burst generator is provided to perturbate the loop periodically to produce a rich transition of the sensor if it is operable. A latching failure indicator circuit is additionally included in the system to energize a visual indicator and alert an operator if the failure condition occurs.
326383
Bendix Corporation (the)
Macrae & Co.
LandOfFree
Latched indicator circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Latched indicator circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Latched indicator circuit will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-679234