Re: [MV] 4 wheel steering on an M998

From: Jim Newton (jnewton@laurel.com)
Date: Wed Jun 11 2003 - 20:29:42 PDT


Hi All...

A while back I saw a write up on an experimental HMMWV being evaluated
by the military that was fitted as a hybrid...electric generator
connected to the diesel engine, and a powerful electric motor at each
wheel.

Since there were no drive lines or drive axles, all four wheels could
mechanically steer, and they could steer really tight...all the way to
90 degrees each way! This was great for parallel parking!

The really cool part was that it could also pivot about its center
like a tank by reversing the motors on one side and forwarding the
motors on the other. It just spun right around with the wheels all
pointed straight!

I believe it had the same standard 6.5 diesel engine connected to a
generator instead of the transmission and transfer case. No batteries
were needed that I can remember, so the weight was comparable to a
standard HMMWV.

I just looked on Google and found this one, but I think it is
different than the one I saw but similar specs:

  http://www.pei-idt.com/hmmwv1.htm

I don't see anything on GL right now. ;)

>> But seriously, whether somebody has tried it or not, it might be much
>> easier to do on a HMMWV than on the typical truck, because the rear wheels
>> are already mounted on ball joints with CV joints on the half-shafts, and
>> are held in place by adjustable radius rods, which could hypothetically be
>> attached to some sort of steering mechanism instead of directly to the
>> frame. Maybe a hydraulic steering cylinder, slaved off the front steering
>> system in some fashion, would be a way to do it.
>
>My point exactly. And thinks about the reduced turning radius and diagonal
>parking. I've seen a movie of a hmmwv with 4ws at www.amghummer.com, but
>that seems to be a "2 steering wheels" implementation.
>
>Now that some of the new GM trucks have 4WS, I would imagine there'd be some
>newly-inspired interest in it.
>
>Vadim.
>
>
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-- 

Jim "Ike" Newton

o 1984 M1007 CUCV Military Suburban 6.2 Liter (378 CID) Turbo-Diesel Engine 5/4 Ton Cargo Capacity, 4WD

o 1971 M35A2 Military Troop/Cargo Truck "Deuce and a Half" 478 CID Turbo-Diesel Multi-Fuel Engine Air Shift Front Axle 2 1/2 Ton Cargo Capacity, 6WD

See These Trucks at www.CUCV.NET Keyword Searching of 22,000 Electronic TMs at www.MILDOCS.com



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