Hi,
I have spent many years programming PIC's to do all sorts of things, I haven't written any programs in the last 4 years though and I feel somewhat rusty. I have a requirement to control the speed of a petrol engine with varying load, it's a single cylinder Briggs and Stratton engine and here are my thoughts so far:-
The input is to be a hall effect device getting one pulse per rev.
The output is to be a model servo which uses 1 mSec pulse for zero travel, 2 m/Sec for full travel, 1.5m/Sec for mid travel etc.
The setpoint is to be a potentiometer.
The overspeed limit is to be 4000 rpm and it must kill the ignition and require a restart.
Has anyone written code for such a device? an automotive cruise control would be a very similar application. If no-one has, I'll get coding and leave the details here for anyone thats interested, PI control would be the preferred method but any crude control would do at the moment.
Thanks,
Kind Regards - John
I have spent many years programming PIC's to do all sorts of things, I haven't written any programs in the last 4 years though and I feel somewhat rusty. I have a requirement to control the speed of a petrol engine with varying load, it's a single cylinder Briggs and Stratton engine and here are my thoughts so far:-
The input is to be a hall effect device getting one pulse per rev.
The output is to be a model servo which uses 1 mSec pulse for zero travel, 2 m/Sec for full travel, 1.5m/Sec for mid travel etc.
The setpoint is to be a potentiometer.
The overspeed limit is to be 4000 rpm and it must kill the ignition and require a restart.
Has anyone written code for such a device? an automotive cruise control would be a very similar application. If no-one has, I'll get coding and leave the details here for anyone thats interested, PI control would be the preferred method but any crude control would do at the moment.
Thanks,
Kind Regards - John
