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- Newsgroups: rec.autos
- Path: sparky!uunet!haven.umd.edu!purdue!mentor.cc.purdue.edu!mshar
- From: mshar@mentor.cc.purdue.edu (Mike Mshar)
- Subject: Re: FLAME! Only a Manual!
- Message-ID: <BxzFD7.x4@mentor.cc.purdue.edu>
- Organization: Purdue University Computing Center
- Date: Thu, 19 Nov 1992 21:22:18 GMT
- Lines: 29
-
- > dmunroe@vcd.hp.com (Dave Munroe) writes:
-
- >>While I am not disputing the weight problems, don't you also have to factor in
- >>the power loss from the torque converter?
- >
- >There are auto trannies with lockup torque converters. I'm just guessing,
- >but I believe that at a certain rpm, they "lock up" and lose little or no
- >power through the fluid.
- >
-
- Bingo, you hit that one. Yes, many new cars with autos have a lock up
- torque converter, which effectively uses a clutching device to make the
- input and output sides of the converter lock together and turn at the same
- rate. Therefore, in this state, there is absolutely no power losses due to
- fluid friction, dry friction, etc. For an automatic at highway cruising
- speeds, it is a great thing to have.
-
- The only problem with this is that it doesn`t function during acceleration.
- So, if you have the pedal on the floor, you still get power losses that are
- associated with automatics. The only time the lock-up converter works is
- when the transmission is in high gear and the car is at a cruising
- condition. So, for acceleration purposes, there is not gain.
-
- Mike
- --
- | Michael G. Mshar | My Life-Long Goal: To keep common sense |
- | mmshar@mn.ecn.purdue.edu | alive and keep the idiots from taking over.|
- | mshar@mentor.cc.purdue.edu | \\President, Nice Guys Anonymous// |
- |____>>> United States Steel, Mechanical Engineer, Technical Services <<<____|
-