I had an idea (yeah, I know, it's lonely 
) while I was reading this topic: http://syty.net/phpBB2/viewtopic.php?t=19661 . In it, Daron and Buster were talking about wanting just enough alcohol injection to prevent knock but no more, because too much will slow you down.
My idea is: what if you were to tie the knock sensing system into the alcohol injection system? You could have automatic closed-loop alky injection control.
It might be very simple to do. Connect the output from Opie's LED knock light circuit (under http://www.chitownsyty.com/tech ) to some kind of duty cycle, pressure or voltage controller on the alky injection system.
The system would then control the alky injection in a manner very similar to how the ECM controls timing: every time the knock light blinks, the alky controller could bump up the duty cycle or pressure. As time passes (based on some adjustable decay rate), the alky controller would reduce duty cycle/pressure/voltage back to a pre-determined minimum.
If you really wanted to get fancy, you could do some custom programming in the chip to change the timing control to allow the alky to have first shot at reducing knock and then have the timing reduction come in later if the alky couldn't control all the knock (two layers of control/safety).
Unfortunately, I don't know enough electronics to design the alky controller. Maybe there's a controller already out there that would work. Or, if there's interest, one of you electronics-smart guys can figure something out.
Anyways, what do you think of this idea? This would probably work for propane injection, too.
) while I was reading this topic: http://syty.net/phpBB2/viewtopic.php?t=19661 . In it, Daron and Buster were talking about wanting just enough alcohol injection to prevent knock but no more, because too much will slow you down.My idea is: what if you were to tie the knock sensing system into the alcohol injection system? You could have automatic closed-loop alky injection control.
It might be very simple to do. Connect the output from Opie's LED knock light circuit (under http://www.chitownsyty.com/tech ) to some kind of duty cycle, pressure or voltage controller on the alky injection system.
The system would then control the alky injection in a manner very similar to how the ECM controls timing: every time the knock light blinks, the alky controller could bump up the duty cycle or pressure. As time passes (based on some adjustable decay rate), the alky controller would reduce duty cycle/pressure/voltage back to a pre-determined minimum.
If you really wanted to get fancy, you could do some custom programming in the chip to change the timing control to allow the alky to have first shot at reducing knock and then have the timing reduction come in later if the alky couldn't control all the knock (two layers of control/safety).
Unfortunately, I don't know enough electronics to design the alky controller. Maybe there's a controller already out there that would work. Or, if there's interest, one of you electronics-smart guys can figure something out.
Anyways, what do you think of this idea? This would probably work for propane injection, too.
