Internal combustion engine

Patent · Tue Jan 04 04:00:00 EST 1983

OSTI ID:6339124

Coles, D K

A spark-ignition engine has self adaptive adjustment of the size of its fuel rations in dependence on misfires in the engine. A misfire is identified as an abnormal deficiency in energy conversion, this being detected by means of a mechanical energy discriminator which compares the quanta of energy derived from different combustion cycles. When a misfire in a particular cylinder is identified, the fuel rations to that particular cylinder are automatically increased. Overall increase of fuel rations is counteracted by gradually decreasing the fuel rations of cylinders when they are firing regularly and not producing deficient quanta of energy. In the preferred embodiment each cylinder has its own fuel injector valve. The valve is normally closed, being opened for a short interval of time during each cylinder cycle. The size of a fuel ration is regulated by varying the duration of opening of the valve. Electrical simulation of engine dynamics allows detection of misfires over a wide range of engine speeds and air intake pressures.

• Assignee: EDB-83-068006
• Patent Number(s): US 4366793
• OSTI ID: 6339124
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330101 -- Internal Combustion Engines-- Spark-Ignition
CARBURETORS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DISCRIMINATORS
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
SPARK IGNITION ENGINES
VALVES