I have had some ask about sharing the code. Looking back at it now it is very sloppy and inefficient so I do not want to share it. Check out Dielectric Video's channel, he has an efi project with very good code and he shares all of it for free.
I really love your work Nick, I am also currently developing thesame system for motorcycle but I'm stuck on how I can detect the valve opening so I can time when to inject fuel. any tips is highly appreciated.
hi, here its triggered off a notch in the flywheel and injects fuel every 2 rotations. The right way to do it is with a cam sensor since it rotates 1 turn for every 4 strokes of the engine
@@Sqwhirlim making one with a pic chip, 12f683. bare minimum:) my approach is that with correct signal conditioning of the VR sensor/crank signal, i can time the length of the (single) pickup tab. as i know how many degrees BTDC the tab is, i simply multiply the value by a certain factor (4, as only suitable options are 4 or 8 with this chip), perform ADC on MAP sensor. do it twice, at say 60 and 120 ATDC, and i can then compare samples, detect the slope produced on the MAP, and also compare the two strokes in much the same manner. you dont REALLY need a cam sensor or multi toothed wheel. just need to think about whats really going on in there. at idle, scope your MAP sensor. increasing vacuum on the intake, with decreasing vacuum on the power stroke. very distinctive, very easy to differentiate. the second sample is either higher, or lower, than the first sample. once you know which stroke is which, fairly simple to keep track of crank pulses to keep injecting on the intake stroke. then once it gets over a certain RPM, approx 6000 at WOT, the actual stroke no longer matters as injection time is longer than a single revolution, so have to inject on every revolution anyway, splitting the open time in half. the fun part is trying to do the program in assembly language... so far ive just figured out interrupts and how to get various open times. no tuning or ADC yet... next stage :)
@@monke.8482check out the pump used in the yamaha R15. its tiny. as its brushless, it also needs the ESC, which happens to be the power penetration into the tank, conveniently. fixed speed, comes on as soon as power is applied. you wont find anything "off the shelf" that doesnt require some type of input signal, otherwise. as most ESC's are intended for variable speed...
I can do a video of how i did everything, i dig this project out about twice a year and work on it i can do it then. It might be a while though. i have some other videos posted about it too.
I have had some ask about sharing the code. Looking back at it now it is very sloppy and inefficient so I do not want to share it. Check out Dielectric Video's channel, he has an efi project with very good code and he shares all of it for free.
Great work, I was looking for small engine efi system that I could put on my pit bike and this is perfect.
Nice beats man
That's pretty cool. I was looking to make something similar in the future.
Sounds like my first car
Sounds like a hit and miss motor. Although, the whole thing is beautiful. :)
thank you it was idling at around 500?rpm and much lower than the carburetor could do
I really love your work Nick, I am also currently developing thesame system for motorcycle but I'm stuck on how I can detect the valve opening so I can time when to inject fuel. any tips is highly appreciated.
hi, here its triggered off a notch in the flywheel and injects fuel every 2 rotations. The right way to do it is with a cam sensor since it rotates 1 turn for every 4 strokes of the engine
@@Sqwhirlim making one with a pic chip, 12f683. bare minimum:)
my approach is that with correct signal conditioning of the VR sensor/crank signal, i can time the length of the (single) pickup tab. as i know how many degrees BTDC the tab is, i simply multiply the value by a certain factor (4, as only suitable options are 4 or 8 with this chip), perform ADC on MAP sensor. do it twice, at say 60 and 120 ATDC, and i can then compare samples, detect the slope produced on the MAP, and also compare the two strokes in much the same manner.
you dont REALLY need a cam sensor or multi toothed wheel. just need to think about whats really going on in there. at idle, scope your MAP sensor. increasing vacuum on the intake, with decreasing vacuum on the power stroke. very distinctive, very easy to differentiate. the second sample is either higher, or lower, than the first sample.
once you know which stroke is which, fairly simple to keep track of crank pulses to keep injecting on the intake stroke.
then once it gets over a certain RPM, approx 6000 at WOT, the actual stroke no longer matters as injection time is longer than a single revolution, so have to inject on every revolution anyway, splitting the open time in half.
the fun part is trying to do the program in assembly language... so far ive just figured out interrupts and how to get various open times. no tuning or ADC yet... next stage :)
Nice work. Can you add a link to the code in your description? Assuming you plan to share it
thanks. im not sharing my code atm but check out dielectric video's channel he has a really good efi project with code available.
Can you share the code with me?
can you share the code please?
Can you up a video about the fuel pump? Do you think its possible to make a smaller one?
I have a video up on the fuel pump. Yes you could make it smaller depending on what your design intentions are.
@@Sqwhirl Nice, thank you again!
@@monke.8482 yeah bro
@@monke.8482check out the pump used in the yamaha R15. its tiny.
as its brushless, it also needs the ESC, which happens to be the power penetration into the tank, conveniently. fixed speed, comes on as soon as power is applied. you wont find anything "off the shelf" that doesnt require some type of input signal, otherwise. as most ESC's are intended for variable speed...
Can u make a tutorial?
I can do a video of how i did everything, i dig this project out about twice a year and work on it i can do it then. It might be a while though. i have some other videos posted about it too.