Control system for controlling DC control motor which controls o

Details Control system for controlling DC control motor which controls o Control system for controlling DC control motor which controls o

1988-02-29

1989-06-13

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Pulsed, timed, tuned or resonating exhaust

60313, 123479, 123487, F02B 2702

Patent

active

048380229

ABSTRACT:
A control system for controlling a DC control motor which controls an internal combustion engine to follow-up a target value varying continuously depending on the operation condition of the engine, the current flowing through the DC control motor being controlled through pulse width modulation. The control system comprises: means for detecting the operation condition of the engine; processor means for calculating and setting a target value depending on the operation condition of the engine; detector means for detecting the up-to-date value of the DC control motor; discriminator means for discriminating a difference between the target value and the up-to-date value to supply an output signal for changing the duty ratio of the current flowing through the DC control motor depending on the difference; a driver for energizing the DC control motor in response to the output signal from the discriminator means; and controller means for monitoring the duty ratio of the current flowing through the DC control motor and for stopping the DC control motor for a predetermined time period when the time duration during which the duty ratio takes a valu higher than a programmed duty ratio reaches a pre-set time duration. In another embodiment, the aforementioned monitoring means is replaced by the monitor means for controlling the changing rate of the up-to-date value and for increasing the duty ratio when the changing rate of the up-to-date value is less than a programmed rate.

REFERENCES:
patent: 3895611 (1975-07-01), Endo
patent: 4196702 (1980-04-01), Bowler

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