Hi!
For my master thesis, I want to use a GDI Injector (BOSCH 0 261 500 533) for dosing a certain liquid into a hot stream, so not in an engine. Therefore, I need a driver for this injector. I need around 5Hz of injection frequency, which should easily be doable with a PWM control. My injector has an impendance of 1.5 ohm. It requires a boost supply of 8.5A at 65V for about 0.4ms, then around 5A at 12V for 0.15ms and 2.5A at 12V for the remainder of the time. Firstly, is it possible to make a PWM signal with different "load" outputs to create such a signal?
I have done some research and came across this thread. Somebody states that hardwarewise, all I need is:
- Some arduino board, accoring to this, all are sufficiently fast
- a driver like LM1949
- a MOSFET like VND5N07 or VND7NV
I have found a circuit here, but unfortunately, it is for a high impendance injector. What do I have to take into consideration? Is there anything I'm missing?
I'm happy for any help you can provide, thanks in advance!