An Overview of Current Automatic, Manual and Continuously Variable Transmission Efficiencies and Their Projected Future Improvements

Document Number: 1999-01-1259

Date Published: March 1999

Author(s):
Michael Kluger - Southwest Research Institute
Denis Long - Southwest Research Institute

Abstract:
This paper will overview current production manual, automatic, and continuously variable transmission (CVT) efficiencies and efficiency variations across the industry. For automatic transmissions, efficiencies associated with the pump and the gearbox components will be highlighted along with areas for improvements. Efficiencies associated with various types of pumps such as internal-external, gerotor, hypocycloidal, and variable displacement will be compared. For CVTs, a comparison of efficiencies for belt type and toroidal types will be provided, along with an examination of external-external and variable-displacement-type ball pumps.

File Size: 154K
Product Status: In Stock

See other papers presented at International Congress & Exposition, March 1999, Detroit, MI, USA, Session: Advancements in Light Truck Drivetrain

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