- #Piezo injector testing borders driver
- #Piezo injector testing borders full
- #Piezo injector testing borders trial
- #Piezo injector testing borders series
Reading signals from TMAP sensor is nothing like reading injector pulse timingīut what has this to do with your extra injectors and added fuel feed?įor one thing, by applying a little less electricity, the piezo crystals expand less so the injectors can open partway. The reason you could not run flex fuel without the kit is probably because of the fact that the engine will knock and that ECU does not have the range to adjust.Īs you point out the TMAP is read and its signal monitored, but in conjunction with the engines knock sensor, it sounds like the kit is just to let you run flex fuel, any extra power I don't know.
As I continue to go up in boost up to 20psi, the volts will continue to go up. So if I was running lets say 10psi of boost, the signal may be at 1.85v. The TMAP sensor is a sensor that basically reads how much boost (psi) is getting put into the engine. One of the ways it works is by taking in a voltage from the tmap sensor.
#Piezo injector testing borders driver
What electronic test equipment do you have to analyse the engine?īecause you will be trying to monitor a high voltage signal in a capacitive circuit, I'm not sure how the injector driver circuit or the injector itself will react to any load.Ī recent product that just came out for our car is a kit that allows us to run E85 and 93 octane blends.
#Piezo injector testing borders full
They are not held half open, they need the full pressure and flow of fuel for a particular time to meter out the required amount of fuel. You don't seem to understand that the injectors are fully open or fully closed. This will tell me how much of the injector nozzle is open I have never constructed my own chip like this and I am not familiar with all the hardware stuff for the electronics.Īnd I don't know how much it takes to open them half way. But in terms of discrete components, can you elaborate a little more? This would be my first project in this sort of stuff. I think you know what needs to be done as you pretty much nailed it. Then After I have the data showing how much fuel comes out of the injector in that pulse, I can create a table to convert it to the low impedance injector. So if I can take the input of the voltage I think it should tell me the pulses. How long each injector sprays, and how many times. This will tell me how much of the injector nozzle is open.
#Piezo injector testing borders trial
It will take some trial and error with some logging to determine how much volts will hold the injector all the way open. But I planned to sort of monitor it to determine how much volts the injector gets when I am pegged out at 7k RPM. And I don't know how much it takes to open them half way. I don't know the max voltage these injectors take.
The voltage is also a factor in how much fuel is sprayed. that way the speed of response will be orders of magnitude better. It might be better to use discrete components and not try to run software. What IS important is the frequency of the PWMĬan the Arduino monitor 6 individual PWM signals, calculate, then output 6 more at timing that would not make the engine suffer. We have the technology to monitor a signal and isolate it regardless of those things. Since we do not care what voltage, amps, etc are being used that is not really important. So 100% is a little confusing, but knowable from the data sheet One has to look at the start of the pulse, the duration of ON and duration of OFF, then the next pulse.īy definition, 50% is ON 50% of the time, and off 50% of the time.īy definition, a piezo has to vibrate so 100% is the maximum frequency that the device needs to operate at maximum. What needs to be known is the frequency of the pulse train
#Piezo injector testing borders series
that is a series of on and off at a high rate with durations of on and off times. Reading the Origional post, he is using piezo injectors.
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