Closed loop fuel control system for an internal combustion engine

Patent · Tue Sep 22 04:00:00 EDT 1981

OSTI ID:5849187

Pomerantz, A J

A closed loop fuel control system for an internal combustion engine is responsive to the output 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 thereafter 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 thereafter 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 controller 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.

• Assignee: General Motors Corp
• Patent Number(s): US 4290400
• OSTI ID: 5849187
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
CARBURETORS
CHEMICAL REACTIONS
CLOSED-LOOP CONTROL
COMBUSTION
CONTROL
ENGINES
EXHAUST GASES
FLUIDS
FUEL SYSTEMS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OXIDATION
SIGNALS
STOICHIOMETRY
THERMOCHEMICAL PROCESSES
WASTES