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- From: Mike Wiese <mikew@apple.com>
- Subject: Re: Turbine/Infinitely Variable Transmission
- Sender: news@gallant.apple.com
- Message-ID: <1992Nov23.104023.22493@gallant.apple.com>
- X-Useragent: Nuntius v1.1.1d12
- Date: Mon, 23 Nov 1992 10:40:23 GMT
- X-Xxdate: Mon, 23 Nov 92 10:27:45 GMT
- X-Xxmessage-Id: <A735F22142010C85@wiese.apple.com>
- References: <BokLuB1w165w@netlink.cts.com>
- Organization: Apple Computer, Inc.
- Lines: 43
-
- Subject: Re: Turbine/Infinitely Variable Transmission
- From: E. Michael Smith, ems@michael.apple.com
- Date: Sun, 22 Nov 1992 03:43:35 GMT
- In article <1992Nov22.034335.24492@michael.apple.com> E. Michael Smith,
- ems@michael.apple.com writes:
- >In article <BokLuB1w165w@netlink.cts.com> jim@netlink.cts.com (Jim
- Bowery) writes:
- >>All this talk about turbine/electric hybrids seems a bit off
- >>the mark given the fact that Epilogics up in Silicon Valley
- >>has created a hard-geared infinitely variable transmission
- >>with less complexity than a typical automatic transmission.
- >
- [stuff deleted]
- >
- >With that said, can you post a bit about the way the tranny works
- >and the gear ratios it can achieve? It could be a real help in
- >making some engines that want to run at constant speed more effective.
-
- a couple years ago when I was working on solar cars with some friends at
- school, we saw an article in some mech e. magazine and sent away for more
- info. the company sent some literature and a videotape.
-
- they didn't explain how it works, you need to sign non-disclosure first.
- they were only interested in licensing the technology, not building it
- themselves.
-
- The transmission is INFINITELY variable, ie all the way from 0:1 to 1:1.
- There's no need for a clutch. A lever moved along a linear path changed
- the ratio, and it was clearly visible on the video that the output shaft
- went from zero to high speed smoothly. As the original poster mentioned,
- it is always engaged, ie it doesn't depend on friction, a variable length
- chain, or the like. hence it can handle high torque loads that CVT's
- can't. As "proof" they showed a big rig that they claimed was retrofitted
- with one of their transmissions.
-
- They claimed device is as small and efficient as a manual transmission,
- and there were no difficult to machine parts.
-
- It all sounds too good to be true, except that it sure looked like it
- worked in the video. I never did the non-disclosure, and I haven't heard
- anything about it since, so if anyone knows anything more, let us know!
-
- mike
-