kinarfi
Well-Known Member
Me plans are to make a cruise control by monitoring the engine speed via the tach output, 2 cycles per revolution, and convert that frequency to voltage via LM2907-8 and use that voltage to control the throttle via a servo.
I would like 1800 rpm to produce a servo pulse of 2 ms and 4500 rpm to produce a pulse of 1 ms at a frequency of 50 Hz, or vice versa, so as the engine slows down, the servo increase the throttle and as the engine speed gets faster, the throttle backs off.
I tried using vacuum - it sucked
Tried using a DC motor, that doesn't work very well either.
Now I'm trying to use a servo of the remote control variety from model air planes. Just need to figure out how to create the set point that the servo will try to maintain.
Anyone have any suggestions or experience with this?
I am running out of ideas to try.
Thanks
Kinarfi
I would like 1800 rpm to produce a servo pulse of 2 ms and 4500 rpm to produce a pulse of 1 ms at a frequency of 50 Hz, or vice versa, so as the engine slows down, the servo increase the throttle and as the engine speed gets faster, the throttle backs off.
I tried using vacuum - it sucked
Tried using a DC motor, that doesn't work very well either.
Now I'm trying to use a servo of the remote control variety from model air planes. Just need to figure out how to create the set point that the servo will try to maintain.
Anyone have any suggestions or experience with this?
I am running out of ideas to try.
Thanks
Kinarfi