Test of Power Steering Pumps as Hydrostatic Drive

I have become pretty interested in hydrostatic hybrid drive systems and wondered if I could use hydraulic power steering pumps to serve as the "transmission" for a mini-bike. The idea would be to have the engine drive a small displacement P/S pump which would in turn "gear down" to a larger displacement P/S pump. Right now it only works if I drive the small pump with the large pump, so I get more RPM, but less torque. I think I may be able to fix the problem with a different (more modern) large pump. We'll see.

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[newinertia]

jfbrink- what if you use two identical pumps like the honda one? I have been interested in the same.... powered by a Honda GC160 5hp.

[jfbrink]

The problem with two identical pumps is that you gain no mechanical advantage. Hydraulic systems can be "geared up" or "geared down" by varying the size of the pump relative to the motor(s). So, two of the same Honda P/S pumps would be like a substitute for a 1:1 sprocket set.

[paintballforever24]

pointless??

[jfbrink]

I would say *almost* pointless.

[thiago497150]

You can try one pump and 2 motors in parallel in each wheel. In parallel you have a mechanical advantage

[joejoemcgee]

Theres a patent on this drive for pedal bikes - I was working on something similar and found the patent recently. Remember to allow for coasting... you'll need some sort of bypass valve, etc.

[joejoemcgee]

Theres a patent on this drive for pedal bikes - I was working on something similar and found the patent recently. Remember to allow for coasting... you'll need some sort of bypass valve, etc.

[ransiergroup]

Not pointless at all. Thats how inventions and new technology is developed. Good video

[superdude533]

Hey man, just wondering... im interested in making a hydrostatic drive gokart. Will this system work in reverse? Id be running it with a 980cc 24hp twin Onan.

Cheers

[superdude533]

Hey man, just wondering... im interested in making a hydrostatic drive gokart. Will this system work in reverse? Id be running it with a 980cc 24hp twin Onan.

Cheers

[deezy4488]

Like the vid. I'm lookin at buildin a motorized hydrostatic skateboard and have been havin troulble findin some cheap pumps. Thanks for the idea. what are you lookin to build?

[RCFLYER83]

So, why will it not work the other way around, powering the small pump and using the other for drive?

[RCFLYER83]

I have been thinking of building a system like this to power somthing for awhile. I was thinking you could put a bypass pipe with a valve, connected between the two hoses with a couple of t's, and it would function just like a clutch. That would be pretty neat for a mini bike. Hydroclutch!!!!!