Quote:
Originally Posted by DieselCAR
Maybe this behavior is unique to TDI's. On a significant downhill grade I can shift into 5th and have very little engine braking effect - and the electronics basically cut off fuel to the engine. When the RPM's get down to around 1250, the controller starts feeding fuel to the engine again.
So implementing this behavior electronically, or some type of start/stop technology, when the engine has no load should be beneficial.
Even better of course would be some form of regenerative braking. This is where even a small battery pack might be very useful - in helping to keep the start/stop or electronic injection from needing to cycle as frequently.
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Or instead of batteries, very large capacitors?