Idle speed control system for a two-cycle engine

Details Idle speed control system for a two-cycle engine Idle speed control system for a two-cycle engine

1989-07-21

1990-11-13

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Idle speed control

123533, F02D 4116

Patent

active

049694359

ABSTRACT:
A two-cycle engine has a scavenge pump provided in an intake passage, and a fuel/air injector provided for injecting fuel directly in a cylinder of the engine together with air. A control unit has a calculator for calculating quantities of fuel and air injected from the fuel/air injector and for producing a fuel injection pulse width signal and an air injection pulse width signal based on the calculated quantities. Engine speed at idling state is compared with a desired idle speed and an error signal is produced. At least one of the pulse width signals is corrected with a correction value for controlling the injection quantity so as to cause the idle speed to converge to the desired idle speed.

REFERENCES:
patent: 4700675 (1987-10-01), Otobe et al.
patent: 4716871 (1988-01-01), Sakamoto et al.
patent: 4780827 (1988-10-01), Fujimori et al.
patent: 4785780 (1988-11-01), Kawai
patent: 4794901 (1989-01-01), Hong et al.

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