F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
341/38.13
F02D 28/00 (2006.01) F02D 41/14 (2006.01) F02D 41/26 (2006.01)
Patent
CA 1158339
C-3213 CLOSED LOOP FUEL CONTROL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE Abstract of the Disclosure: A closed loop fuel control system for an internal combustion engine is responsive to the out- put of a sensor monitoring the air/fuel ratio of the exhaust gases in the exhaust gas passage from the engine and therefore, after a transport time delay period dependent upon engine operating conditions, to the air/fuel ratio of the mixture supplied to the intake space of the engine and generates a first signal having a value preset to zero at each change in the sense of deviation of the sensed air/fuel ratio from a stoichiometric ratio and varying there- after at a predetermined rate dependent upon the transport time delay and a second signal having a constant value for the period of the transport time delay after a change in the sense of deviation of the air/fuel ratio from a stoichiometric ratio and there- after varying at the predetermined rate and in a sense determined by the sense of deviation of the air/ fuel ratio from the predetermined ratio. The control- ler adjusts the air/fuel ratio of the mixture supplied to the engine in accord with the sum of the first and second signals and in a direction tending to produce the stoichiometric ratio.
370760
General Motors Corporation
Gowling Lafleur Henderson Llp
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