Intake system for an internal combustion engine

Details Intake system for an internal combustion engine Intake system for an internal combustion engine

1986-10-28

1988-11-29

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123491, F02D 4106, F02D 4114

Patent

active

047873574

ABSTRACT:
An intake system utilizing an air-fuel control which is changed in accordance with the coolant temperature. When the coolant temperature is lower than the first coolant temperature, an open loop control is carried out in accordance with the coolant temperature so that a fluctuation of the air-fuel ratio can be restricted so as to obtain a stability. An air-fuel feedback control is carried out between the first and second coolant temperatures wherein the air-fuel ratio is maintained at the stoichiometric value so that an increase of NO.sub.X emitted from the engine can be suppressed. In the region in which the coolant temperature exceeds the second temperature, an air-fuel feedback control is carried out in the lean mixture side of the stoichiometric value in accordance with the coolant temperature to thereby improve the emission performance of the engine.

REFERENCES:
patent: 4321903 (1982-03-01), Kondo
patent: 4357922 (1982-11-01), Rosenzopf
patent: 4483301 (1984-11-01), Yamada
patent: 4566419 (1986-01-01), Ninomiya
patent: 4580539 (1986-04-01), Kitahara
patent: 4628883 (1986-12-01), Kataoka

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