Hi Guys,
I'm doing some self study here on a '06 Santa Fe.
On the dealership Workshop Manual I'm studying what the data should read on the IMV and PCV valves on the Bosch CP3 Pump.

The following is a direct quote from the dealer workshop manual:
In order to control rail pressure to be optimum to current driving condition, ECM controls fuel pressure regulator valve operating current(with the method of duty-control) using RPCV signal, RPM and APS signal. The LOWER Fuel pressure regulator valve current is, the MORE fuel is supplied to common rail. Thus it leads rail pressure to be high. On the contrary, the HIGHER Fuel pressure regulator valve current is, the LESS fuel is supplied to common rail. Thus it leads rail pressure to be low. Therefore, when Fuel metering unit current becomes "0", as if there is open spot in Fuel metering unit circuit or connector is disconnected, maximum fuel quantity is supplied to common rail, so the pressure of common rail rise to maximum value."

The above info is correct, is simple and is easy to understand.

But then the manual shows the following graphs / information:


These graphs show that the duty% is increasing under acceleration but surely if the system is adding fuel, the ECU should be decreasing the IMV Duty% in it's efforts to reduce IMV current. I find this confusing and I think that this info is incorrect.
By the vay, they refer to the IMV valve as the Pressure Regulating Valve.



Would anyone like to commenton this?

Thanks for your time and effort
Regards
Eamonn