|
Title: rs3 8p med 9 port injection Post by: Piar on April 20, 2020, 08:25:05 AM Hi everyone. as many of you know it's possible to control port injectors via oem med 9 ecu. And one company in France doing such projects but they do not sell solution.
So the question is = how do the make it? I think that they use one single output of solenoid which controls intake manifold flaps and which one are deleted during port injector installation Title: Re: rs3 8p med 9 port injection Post by: prj on April 20, 2020, 12:17:18 PM Use any available PWM output and either make sure it can handle the current from 5 injectors in batch fire or install an amplifier.
And of course add code to run them. Title: Re: rs3 8p med 9 port injection Post by: scalp06 on April 20, 2020, 03:05:20 PM Hi everyone. as many of you know it's possible to control port injectors via oem med 9 ecu. And one company in France doing such projects but they do not sell solution. So the question is = how do the make it? I think that they use one single output of solenoid which controls intake manifold flaps and which one are deleted during port injector installation Adding this feature on your Oem ecu is a very hard work... Find a pwm output available is easy job, but reworking Ecu Sw for adding specific code for drive port injection properly is another story... definitely not a few days projets. Title: Re: rs3 8p med 9 port injection Post by: prj on April 21, 2020, 07:49:01 AM Adding this feature on your Oem ecu is a very hard work... Maybe for you. I'd say a few days project is exactly what it is.Find a pwm output available is easy job, but reworking Ecu Sw for adding specific code for drive port injection properly is another story... definitely not a few days projets. There is publicly available powerpc toolchain, so all the higher level code can be written in C, compiled and inserted. And then the references to the original logic just have to be deleted. I've made my own Boost PID controller in the past for a NA ME7 ECU, and I wrote the entire thing in asm... With about 10 configurable maps. Took me a few days. This is a lot easier. Title: Re: rs3 8p med 9 port injection Post by: SKOLS on April 22, 2020, 01:58:05 AM Maybe for you. I'd say a few days project is exactly what it is. There is publicly available powerpc toolchain, so all the higher level code can be written in C, compiled and inserted. And then the references to the original logic just have to be deleted. I've made my own Boost PID controller in the past for a NA ME7 ECU, and I wrote the entire thing in asm... With about 10 configurable maps. Took me a few days. This is a lot easier. You're right, if we consider that the goal is to pilot this in full group, with a WMi type approach. This is what the company mentioned above does. On the other hand, if the objective is to perfectly dose the additional contribution, in semi sequential mode, subject to the crankshaft position, it is a whole other story. But nothing is ever impossible. Title: Re: rs3 8p med 9 port injection Post by: prj on April 22, 2020, 02:06:51 AM Sequential gives absolutely nothing on WOT. And this is where this would be used.
On low load it's on DI anyway. So irrelevant in this case. Title: Re: rs3 8p med 9 port injection Post by: SKOLS on April 22, 2020, 04:23:51 AM Sequential gives absolutely nothing on WOT. And this is where this would be used. On low load it's on DI anyway. So irrelevant in this case. Yes, so put a switch under the pedal, with a 1€ relay and it's done.... ;D ;D Title: Re: rs3 8p med 9 port injection Post by: IamwhoIam on April 22, 2020, 04:29:48 AM :D :D :D
Title: Re: rs3 8p med 9 port injection Post by: prj on April 22, 2020, 08:05:31 AM Yes, so put a switch under the pedal, with a 1€ relay and it's done.... ;D ;D Technically, that's about how wet shot nitrous works :PYou still have to have PWM control for the quantity of the fuel (well more rather crank sync set and stop pulse). But at high load any sequential control is completely irrelevant. You could even do this with TB injection (mono-injection), but it would be hard to find an injector so big that has good atomization. WMI works great this way with two nozzles. Of course the injected fuel has to relate to load, as well as fr_w should affect it - but it's not exactly rocket science. |