City driving econ: Faster accel in lower gears vs. Slower accel in higher gears?

[cRiPpLe_rOoStEr]

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.

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.

[Grant-53]

A few years ago BMW did a study that indicated 3/4 throttle acceleration was optimal. Also note that slow acceleration will affect traffic flow and the traffic signal operation algorithm.

[Piwoslaw]

Originally Posted by Grant-53

A few years ago BMW did a study that indicated 3/4 throttle acceleration was optimal. Also note that slow acceleration will affect traffic flow and the traffic signal operation algorithm.

Sounds close to the 80% load I heard about a while ago.

[cRiPpLe_rOoStEr]

Having learned to drive in a car without a tach, maybe relying on some random arbitrary pedal-based measure could be simpler, yet sometimes it doesn't work in real-life driving. I remember so many times hitting the pedal to the floor while the Opel Corsa B struggled to keep RPM before I had to shift to a lower gear...