New Veriable Speed transmission

Discussion in 'General Motoring' started by mike, Oct 21, 2006.

  1. mike

    DeserTBoB Guest

    Brilliant idea...so the driver, instead of shifting 4 times during
    acceleration, would keep one hand on a control lever ALL the time to
    adjust the belt position while watching the tach, right?

    Why not call GM with this idea? They're so stupid, they'd buy
    anything!
     
    DeserTBoB, Oct 25, 2006
    #21
  2. DESERTBOB (not its real name) is a troll.
    It regularly frequents at least twenty news groups,
    including many rabid/sex/racist/liberal idiot/wannabee mechanic groups.

    Normally, it starts off with reasonable, even witty lines,
    but rapidly drifts into lies, abuse and stupidity.
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    See it's pathetic picture and myspace page at this URL- as it searches
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    http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile&friendid=30321125

    It had 2 Ebay usernames, both banned due to abuse, auction
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    It is a sad creature, deserving of pity, not anger.
    Any direct response simply feeds it,
    but it will go away if you ignore it.
     
    duty-honor-country, Oct 25, 2006
    #22
  3. mike

    Bret Ludwig Guest

    DeserTBoB wrote:
    The aircraft industry has been that stupid since the late 30s. See
    "constant speed propeller".
     
    Bret Ludwig, Oct 26, 2006
    #23
  4. mike

    DeserTBoB Guest

    CSPs were/are hardly the same thing. Prop speed is a constant; a road
    vehicle's load and speed changes almost infinitely.
     
    DeserTBoB, Oct 26, 2006
    #24
  5. mike

    Dave Gower Guest

    Like most people here, I've killfiled this Desert Bob creep, but this
    exchange highlights just how practical a manual-only CVT might be. In fact
    they do exist. There are several CVT autosticks for sale, including
    top-level Calibers and Compasses. They use a 6 -speed fixed detent system
    (more in some systems), so they shift sequentially like paddle-shifts in
    expensive supercars. I suppose one could also allow the driver to program in
    the position and number of preset "gears".

    Another possibility I've seen mentioned is more detents (say 15 or more) but
    set it up so that the driver can slide a shifter over more than one click,
    thereby determining how big a gap he wants between the "gears".
     
    Dave Gower, Oct 26, 2006
    #25
  6. mike

    Steve Guest

    Not really- prop speed is under PILOT CONTROL, not truly "constant".
    Most airplanes with "constant speed" propellors have two power levers
    instead of just a throttle- one lever is the prop control, which sets
    RPM. The other lever is the throttle. The pilot can set the prop speed
    to where he wants it and independently control engine torque with the
    throttle, and also increase prop speed (for more power, or actually more
    "thrust") or decrease it (for more fuel efficiency) at will. What the
    pilot does NOT control directly is the actual pitch of the prop blades-
    the prop governor controls that based on the selected prop speed, the
    throttle (torque applied to the prop) and also airplane speed (the speed
    of the air hitting the prop affects where the pitch has to be set to
    maintain a constant RPM.

    I also was thinking that a CVT with a manual control lever would be
    almost exactly like flying an airplane with prop control. Really cool
    (for 5 minutes) then a PITA after that :)
     
    Steve, Oct 26, 2006
    #26
  7. mike

    phreaq Guest

    First I am amassed at the wealth of information here about CVT's, I had
    no idea so many of them were used on cars back then.

    My only 2 cents: I belive the Saturn Vue AWD V6 came with a CVT
     
    phreaq, Aug 12, 2007
    #27
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