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A Digital Electronic Shift Schedule Control for Vehicular Automatic Transmissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1979 by SAE International in United States
Annotation ability available
A digital transmission shift schedule control has been developed which measures throttle position and vehicle speed to determine the proper gear ratio based on preprogrammed upshift and downshift schedules.
Transmission pleasability was evaluated for various degrees of resolution for these two primary input variables. Five- and six-bit vehicle speed and three- and four-bit throttle position resolutions were tested. Throttle position was measured with an experimental variable reluctance (variable frequency oscillator) device, located above the throttle pedal; vehicle speed was measured by a magnetic pickup from a toothed wheel on the transmission output shaft.
The electronic control system has been evaluated for over 4000 miles under city, highway, sea level and high altitude conditions.
|Technical Paper||Research on a Neural Network Model Based Automatic Shift Schedule with Dynamic 3-Parameters|
|Technical Paper||Research on Dynamic 3 - Parameter Shift Schedule of Automatic Transmission|
CitationCasey, G., "A Digital Electronic Shift Schedule Control for Vehicular Automatic Transmissions," SAE Technical Paper 790044, 1979, https://doi.org/10.4271/790044.
- Chana H.E. Fedewa W.L. Mahoney J.E. “An Analytical Study of Transmission Modifications as Related to Vehicle Performance and Economy,” SAE Paper No. 770418 SAE International Automotive Engineering Congress and Exposition Detroit, Michigan 28 February 4 March 1977
- Reddy J.N. “Sensors for Automotive Engine Control.” SAE Paper No. 770399 SAE International Engineering Congress and Exposition Detroit, Michigan 28 February 4 March 1977