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Old 12-05-2002, 08:51 PM   #1
ciper
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Member#: 15543
Join Date: Feb 2002
Location: san francisco, ca
Vehicle:
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built

Default Wild! 4wd CVT Pleo, no center diff or propshaft?!

So the front wheels are powered by the CVT while the rear wheels have a 42 volt electric engine!

The throttle position is monitored and the correct amount of torque is applied to the rear as needed.

I have to say the PLEO is one of the coolest cars I have seen, can you imagine a forced induction intercooled cvt MICRO car with almost zero drivetrain loss? This thing must be very fast and handle like mad.

Taken from http://www.performancesubaru.com/newspress.htm

Full text:

Back to the Future for Subaru's Concept Car - Retro styling cues combined with all-wheel drive via an ingenious electric motor are highlights of Subaru's HM-01 concept car at the Frankfurt Motor Show. Designed to evoke memories of the 1958 Subaru 360 - the company's first car the HM-01 is on display on stand C06, Hall 8. Despite featuring trafficator indicator arms protruding from the A-posts and 50s style side panel crease lines, the HM-01 also succeeds in looking practical and contemporary, with a wheel-at-each-corner 'planted' look. The HM-01 uses the front wheel drive platform from the Japanese home market Pleo microcar. It's 658cc straight-four petrol engine drives the front wheels via Subaru's i-CVT (Continuously Variable Transmission). The rear wheels are driven by a 42volt electrical motor system. Cleverly, the difference between front and rear wheel speeds is synchronised electrically.



Wired Up for Sound Grip - Instead of a propeller shaft running to the rear to power the rear wheels, the HM-01 has wires that pass current to a rear mounted motor that looks after the rear drive. A central processing unit monitors driving conditions and the throttle position and distributes power in the most efficient and environmentally friendly way possible. When the car is cruising on the overrun, the momentum of the rear wheels is converted into electric power by the alternator in the rear drive unit which also recharges the batteries. The electrical components consist of a 42 volt system utilising a readily available, easily recyclable 36 volt sealed lead acid battery. This is used in conjunction with a regular 12 volt unit, a high-power 3 kW alternator and a DC-DC converter that takes the power down to 14 volts for the rest of the cars electrical system
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Old 12-05-2002, 09:15 PM   #2
RebelINS
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Join Date: Nov 2000
Chapter/Region: MWSOC
Location: Rochester, MI, USA
Vehicle:
2000 Impreza 2.5RS
2005 Impreza WRX STi

Default

That is a neat little car, and an interesting concept. I wonder if it will ever make production? I wouldn't mind owning a 360 either, just to have a piece of Scooby history, but they are pretty hard to find (even though I know SubieGal has two ).

-Wes
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Old 12-06-2002, 12:07 AM   #3
Kevin Thomas
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Location: 1997 OBS, 1996 SVX, 1988 RX
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1989 1989 XT6

Default Well

Why not turbocharge an AWD Subaru Justy with the ECVT tranny?

That's one of the things I'd like to do.
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Old 12-06-2002, 02:32 PM   #4
steve_d
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Join Date: Sep 1999
Chapter/Region: South East
Location: Lawrenceville, GA
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The eCVT will never hold it...my bud blew two of them in 1 season of autocrossing...

sjd
who's picking up his 360 this week or next...
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Old 12-06-2002, 07:33 PM   #5
vrg3
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Location: Cleveland, OH (sometimes DC)
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1993 Legacy Turbo
Burgundy

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Huh, cool...

That's very similar to the system used in Cornell University's current Hybrid Electric Vehicle:
http://www.hev.cornell.edu/

A turbocharged Miata engine run off natural gas powers the rear wheels and an electric motor powers the front. The batteries can charge by using the front motor as an alternator.
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Old 12-08-2002, 08:28 AM   #6
aspera
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Join Date: Jun 2001
Location: east of Zzyzx
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That's "through the road" four wheel drive. Besides giving the advantage of all wheel drive, it lets a front wheel drive car become a hybrid-electric vehicle without having to cram all of the electric stuff under the hood. The car loses cargo space and increases in weight, complexity, and cost.

You also have to wonder EXACTLY how the four wheel drive system works. Is it an automatic full time system? What is the torque split when different wheels lose grip? If both front wheels spin at WOT, do the rear wheels maintain maximum torque or try to match the torque being applied to the road by the front wheels (nearly nothing)?
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Old 12-08-2002, 08:31 AM   #7
aspera
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Location: east of Zzyzx
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"distributes power in the most efficient and environmentally friendly way possible"

This sounds like my low RPM torque on my WRX....environmentally conservative boost.
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