ok, one stupid question, for drive by wire throttle which outputs can be used? only injector outputs or maybe any other? asking this because I need to run it on v8 engine :)
Seems no any common output. It uses injector pwming signal translocated to drive external hardware with H-bridge. So lots of hardware modifications necessary.
Gints
Quote from: GintsK on September 12, 2013, 06:23:10 AM
Seems no any common output. It uses injector pwming signal translocated to drive external hardware with H-bridge. So lots of hardware modifications necessary.
Gints
so that means injectors in pairs on v8 if I want to use dbw :(
No! You just can't use injector pwming.
I mean if I want dbw on v8 i dont have enough injector outputs to drive throttle and 8 injector outputs
Injector PWMing signal is not INJ output. It's a different signal. Take a look to VEMS schematics: pin14 of Atmega. So you can still go fully sequential.
Quote from: GintsK on September 12, 2013, 06:34:18 PM
Injector PWMing signal is not INJ output. It's a different signal. Take a look to VEMS schematics: pin14 of Atmega. So you can still go fully sequential.
and that means free ignition output for dbw or maybe even second wideband heater for that.
? For driving DBW we need H-bridge. PWM driven, = not existing stepper chip. So 2 pairs of powerful transistors (2xPNP, 2xNPN) + electronics. External board.
In addition - we have to prepare some analog inputs with filters. Like TPS input have. And one output for safety relay. More safe would be to not use P259 chip for it.
Gints
Ok, can someone give shematics for it ? I'll try to make it working
http://www.pololu.com/catalog/product/1392
this one I'm using seems not having 4 powerfull transistors. I'm thinking will it work from that vems 500hz output he is supporting Frequency/tachometer digital input up to 2 MHz with 1 ms PID period.
(Open-loop control with no feedback also available.) open loop with no feedback would work I think.
I join the question of a scheme can be described as a block that outputs are used for what.
I searched the forum and vems.hu and found nothing