Method and apparatus for electronically controlling a fuel suppl

Details Method and apparatus for electronically controlling a fuel suppl Method and apparatus for electronically controlling a fuel suppl

1994-07-21

1996-12-03

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

F02D 4106

Patent

active

055797377

ABSTRACT:
Engine output fluctuations are detected based on combustion pressure, and a fuel supply quantity amended so that the output fluctuations approach a permissible limit value. The properties of the fuel being used, can be estimated based on the amendment level, using characteristics that the limit air fuel ratio for stable combustion becomes leaner as the fuel being used is more volatile. Then when the fuel being used is volatile, the target air-fuel ratio in the air-fuel ratio feedback control is made leaner, thereby improving fuel consumption and exhaust gas properties.

REFERENCES:
patent: 4942848 (1990-07-01), Terasaka
patent: 5353764 (1994-10-01), Tomisawa

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