RE: Jetta Hybrid Conert?

["Bob Oldham" <boldham@smv.org>]

Why would you need a transmission on the rear electric drive? If the
final output from a transmission is 1:1 to the drive shaft, why not just
drive direct to the rear differential and use the ICE for accelleration
boost and base-lever cruise power? In theory on the straight and level
you could drive all electric. Or if you could get a small overdrive unit
between the motor and differential, you could have two speeds forward
for the electric.

What would happen to the transaxle of a FWD vehicle if you turned it
around? Would running it backwards hurt it? If it wouldn't, you could in
theory run a normal rotation motor (CCW?) on it using a Honda
transmittion and the motor would be in the former trunk. Possible?

Bob Oldham

-----Original Message-----
From: Rich Weiss [mailto:richheidi@techheadnet.com]
Sent: Wednesday, October 31, 2001 10:54 AM
To: ev@listproc.sjsu.edu
Subject: Re: Jetta Hybrid Conert?


The drive shaft to a rear drive axle will turn about the engine speed in
4th
gear [manual] or Drive [for an automatic]. For most "small" cars this
will
be at least 4000 RPM at 60 mph

13 inch tires turn about 950 revolutions per mile, while large
[235/75R15]
tires are about 720 revs/mi. The "final drive" ratios are up to 5:1 in a
small engined car, with down to 2:1 for a large V8, without overdrive

I would think the easiest "hybrid" to construct would take a 84-92 Honda
Civic wagon, or a Toyota Tercel, or Corolla wagon. All these were
available
as 4WD. [I'm sure there're other similar combinations, Subaru comes to
mind
also]

Install the "4wd" rear axle in your 2wd car, it bolts up to the chassis.
Install a small [6.7" ADC for example] motor in the tunnel, and follow
it
with a small manual trans, like a pre 76 Volvo. Now depending on how
many
batteries, and how you set up the controls, you can go all electric, all
IC,
or any combination. Adding 5 electric horsepower, at cruising speed
would
REALLY cut fuel consumption.

Obviously this would require "lumps" in the floor/tunnel, but easily
dooable.

Rich

----- Original Message -----
From: "VanDerWal, Peter" <vanderwp@fhu.disa.mil>
To: "'EV List'" <ev@listproc.sjsu.edu>
Sent: Tuesday, October 30, 2001 2:32 PM
Subject: Re: Jetta Hybrid Conert?


> I've been thinking about this idea and using the
motor-in-the-driveshaft.
>
> I just noticed a potential problem.  Doesn't the drive shaft only spin
at
> about 300 rpm at highway speeds?  That's way to slow for most electric
> motors.
> Not an insurmountable problem, but something to consider.
>
>
>