Well, it's not exactly the same, because you can, by increasing the
pressure, increase the speed of the wheels, but how can you, by
reducing the pressure, slow it down? won't it just "ignore" the change?
for example (I know it's not the same) - in a bicycle - you can
accelerate by the pedals, but you can't slow down by turning them
slower...

Mark Olson כתב:
> wrote:
>
> > In an Automatic gearbox, instead of a clutch, there's a torque
> > converter, right?
> > Now, I know that in manual gearbox, engine brake happens because the
> > engine is 100% connected to the wheels - so engine revs down = car
> > slows down.
> > However, in automatic gearbox, there's the torque converter - which is
> > generally two parts in which the engine part moves the wheel part, and
> > it's done by oil pressure. The question is - how can the engine slow
> > down the wheels - when there's no direct connection betw/ them, only an
> > oil pressure one?
>
> You might as well ask, how can an engine drive the transmission through
> the torque converter, since there's no direct mechanical connection
> between them?
>
> In other words, the torque converter works both ways.