Inter-cylinder-injection fuel controller for an internal combust

Details Inter-cylinder-injection fuel controller for an internal combust Inter-cylinder-injection fuel controller for an internal combust

1998-01-28

1999-11-23

Wolfe, Willis R.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

123295, F02B 502

Patent

active

059881380

ABSTRACT:
An inter-cylinder-injection fuel controller for an internal combustion engine maintaining stable operation performance at a low cost. The inter-cylinder-injection fuel controller comprises a control unit 8B for controlling the injectors in a mode of the compression stroke injection or in a mode of the intake stroke injection, wherein various sensors 20 include an amount-of-intaken-air sensor and a crank angle sensor, and said control unit includes change-in-the-running-speed suppressing portion 82, 83 for suppressing a change in the running speed caused by a change in the external load in the mode of the compression stroke injection by correcting the amount F of supplying fuel, a rich determining portion 85 for forming a rich signal RC when a target air-to-fuel ratio A/Fo based upon the corrected amount of supplying fuel is on the side more rich than a predetermined lower-limit value .alpha., an air-to-fuel-ratio clipping portion 86 for clipping the controlled air-to-fuel ratio to the lower-limit value in response to the rich signal, an amount-of-deviation operation means for operating the amount of deviation .DELTA.A/F between the lower-limit value and the target air-to-fuel ratio in response to the rich signal, and parameter correction portion 87, 88 for correcting the control parameters toward the direction of increasing the output depending upon the amount of deviation.

REFERENCES:
patent: 4883038 (1989-11-01), Nakaniwa
patent: 5020504 (1991-06-01), Morikawa
patent: 5078107 (1992-01-01), Morikawa
patent: 5875756 (1999-03-01), Kamura et al.

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