saviour stivala wrote: ↑Mon Jun 26, 2023 2:41 am
The gist of the subject (of what I was saying) that ICE throttles and accelerator pedal positions relationship means ''throttle pedal to the floor means ICE throttles fully open - driver goes off-throttle means ICE throttles fully closed''. Some does not agree, does not see it that way. No problem there, we can discuss it further maybe even learn from different opinions from others as that is what a forum is all about. But the usual problem that crops-up is the divergence from the gist of the subject at hand, although most of what is diverted too is relevant to the subject proper, agreeing and disagreeing upon is also the norm. Then comes a time when one is asked to quate relevant rules and regulations. But will these askers be able to quate written rule and regulations confirming what they themselves are pushing forward?". Having said all that, back to the divergences from my expressed opinion that "throttle pedal to the floor means ICE throttles fully open and driver off-throttle means ICE throttles fully closed''. In my opinion what goes inside the cylinders regardless of all other possible 'conditioning' of what is intended to go in said cylinders, is totally controlled by the said cylinder throttle valve. Also my opinion that. While the ICE torque map is shaped on the test bench, and that will be what the engine will deliver, it will deliver in accordance with driver demand through the use by driver of accelerator pedal positioning by said driver "accelerator pedal to the floor max torque delivered through fully opened ICE throttles. and driver off- accelerator pedal zero torque delivered by ICE throttles being closed.
The very curt answer to that I believe is no, that's not what happens.
Extreme familiarisation with the written rules is certainly needed though, that's to interpret fully.
In very simple terms, the throttle is little more than a variable resistance potentiometer report to engine ecu. Probably digital form rather than analogue voltage.
There's many instances when ecu will be moving throttle restriction according to mapping. These all dictated by torque map, strat mode (think lift and coast etc) along with many other parameters.
These could be some of them....regen braking into store... the throttle restriction could be wide open as you don't need or want ice braking effect to run maximum kinetic through crankshaft (the less restriction the better efficiency) to store in shortest time frame/maximum energy. Likely conditional on fuel input than physical throttle restriction to give minimal torque in response to driver demand.
Down shift blip, anti stall, upshift torque reduction a few more when the throttle is either closed or open by driver command but with ecu modulating rpm shift to achieve these control conditions that are used.