Re: hydrostatic transmission [was:Matt/Jay/power steering discussion]

[farna@xxxxxxx]

The system would actually be pretty efficient with constant pressure since the engine (preferably a diesel) could operate at it's most efficient speed at least 75% of the time. Get a little more complicated and add computer control and throttle by wire. Then the computer could vary pressure as necessary and increase engine speed when more than normal pressure was needed (or decrease it). Hmmm.... use a pressure tank reservoir and you'd have a boost for take-off without increasing engine speed, or for acceleration and engine speed could gradually increase instead of a quick throttle opening. 

Oh well, we're getting way off topic, unless you're planning on converting your Rambler/AMC... ;>

On May 9, 2005 andrew hay wrote:

> i had infinitely-variable axial piston swashplate pumps and motors in
> mind, and i think they have the necessary range.  i never got the
> engine speed / pump control entirely sussed [ideally a speed/volume
> curve matched to the engine's power], but i was envisioning a
> constant-pressure system and that would make motor control easy: as
> pressure tries to rise, the control servo increases motor volume; as
> pressure tries to fall, the reverse.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> 
> adh@xxxxxxxxxxxxxxxxx                       and think what none thought
> 
> 
> 
> .


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