dp_tech Posted March 12, 2016 Report Share Posted March 12, 2016 (edited) I want to use fuel pump controller from Audi RS4 p/n 8E0906071A(B) with Link G4+ (PlugIn Evo 9) to drive the Deatschwerks DW300 fuel pump. As I know the Audi RS4 engine control unit sends inappropriate PWM signal (frequency 20 Hz) to the fuel pump control unit. The control unit sends a PWM control signal (frequency 20 kHz) to the fuel pump, this info from car specific manual. So, if I set three stage PWM speed control option (80Hz 33/66/100% DC) and then set up FP Speed (Auxiliary Output) at 20 Hz (same like audi controller input signal), what the value shut be output from Link ECU 80Hz at 100% duty or 20Hz?May be someone has an experience with similar application or just use a simple control by resistor? Edited March 12, 2016 by dp_tech Quote Link to comment Share on other sites More sharing options...
Scott Posted March 14, 2016 Report Share Posted March 14, 2016 So the ECU sends a 20Hz signal to the fuel pump controller. Does it then control it by altering duty cycle? If yes then I would assign the aux output as 'GP PWM' with a constant frequency of 20 Hz, and then use the 3D 'Aux X GP PWM DC' table to control the duty cycle based upon whatever condition you decide. Perhaps engine speed and injector duty cycle. Quote Link to comment Share on other sites More sharing options...
dp_tech Posted June 27, 2016 Author Report Share Posted June 27, 2016 Hi Scott,Thanks for your reply.I saw in the new software update was added open loop control for the fuel pump, what the carrier frequency of the modulation in this mode? Quote Link to comment Share on other sites More sharing options...
Simon Posted June 27, 2016 Report Share Posted June 27, 2016 In this mode the frequency is set by the setting on the Aux out set as FP Speed Quote Link to comment Share on other sites More sharing options...
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