[Shotimes] Dyno charts
BJamesjr@aol.com
BJamesjr@aol.com
Thu, 16 Jan 2003 12:56:00 -0500
> Several cars now, and more to come have CVTs, Continuously Variable
> Transmissions. Although their behaviour depends on programming, the ideal
> for performance is to let the engine rev to peak hp and the tranny will
> adjust and accelerate the car. Wide torque band no longer
> needed.
This concept has always interested me, although I'm still skeptical of the internal workings of the CVT's themselves. The computer could track your throttle position and speed and determine from that if you were trying to maintain steady state speed or accellerate. If you are trying to maintain steady state speed, the computer can calculate what rpm is most efficient for the engine in terms of fuel usage at that power level and tell the transmission to shift as required to put the engine at that power level. For accelleration it can do the same- determine what power level you want and what engine rpm is best for that level of power output. At some point it would have to determine that the power output you want is beyond efficient operation and begin transitioning to higher rpm's, all the way up to eventually the rpm equating to peak horsepower at WOT.