Quote:
Originally Posted by Logic
So it has a normally open throttle valve just to charge vacuum powered ancillaries during overrun and braking/ (free power)
|
AFAIK the brake booster is the only vacuum-powered device on most (if not all) modern cars.
Quote:
I can see it getting hydraulic pressure to actuate, from the same pump that actuates the VVT, but, at a guess I'd say there's a torque sensor or 2 in the drive-train somewhere that picks up torque coming from the wheels and/or flywheel during overrun..?
Probably a braking sensor, involved in decisions to..?
|
I don't know how the electro-hydraulic actuators of the intake valves work, but the throttle plate is entirely electronically-controlled and actuated.
And most newer cars have electronic throttle pedals, regardless if gassers or Diesels.