This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Universal Control and Protection Hydraulic Automaton for Hydromechanical Transmissions
Technical Paper
2001-01-0879
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Modern hydromechanical transmissions are equipped with electronic-hydraulic (mechatronic) control systems having much more functional capabilities compared to classic hydraulic systems.
However, automatic hydraulic systems are widely used not only as the basic transmissions' control device and a mechanical part of mechatronic systems but also as an important facility providing reliability and safety of such systems.
At the same time such an application has quite a number of restrictions, especially for transmissions with a great number of gearstages. One of the main reasons is the inability to control more than 3 or 4 stages of gears while using the vehicle's speed as a control parameter. It deals with the parabolic characteristic of the output pressure of centrifugal governor used as the vehicle speed sensor.
This restriction can be eliminated by using a hydraulic detector of torque converter's turbine (i.e. input shaft of gearbox) speed. The paper considers the operating principles, design and testing of such a hydraulic automaton capable of controlling converter's lock-up clutch. It may be used in hydromechanical transmissions as the system's back up and protection or as a self-sufficient hydraulic automaton.
Recommended Content
Authors
Topic
Citation
Krasnevski, L., Vysotski, M., and Boikov, V., "The Universal Control and Protection Hydraulic Automaton for Hydromechanical Transmissions," SAE Technical Paper 2001-01-0879, 2001, https://doi.org/10.4271/2001-01-0879.Also In
References
- An all-adaptive electronic four-speed transaxle Leisig Maurice (Chrysler Corp.) Automotive Technology International 1989
- Control method of clutch-to-clutch powered downshift in an automatic transmission Lentz K. General Motors Corp.
- Hydraulic clutch pressure control for an electronically controlled transmission Person D. et al. Ford Motor Co.
- Hydraulic Control for a power transmission with a manual range selector valve Bullock B. General Motors Corp.
- Back-up device for an electronic control system for an automatic transmission Nishikawa M. et al. Honda Giken K.K.K.
- Logic valving for a transmission control Long C. et al. General Motors Corp.
- The safety of mechatronic control systems for hydromechanical transmissions Krasnevski l. Vysotski M. Boikov V. 1999 SAE International Congress and Exposition Detroit, Michigan March 1-4 6
- Condom P. Engines for future combat aircraft: what's need and what's achievable Interavia 1982 1050 1052
- Shift signal valve hysteresis McQuinn T. General Motors Corp.
- Sheinker I.G. Shimkov A.A. Krasnevski L.G. et al. The scale of automatic hydromechanical transmissions for heavy duty automobiles Automobile Industry 1980 7 10
- Krasnevski L.G. Control of vehicles' multispeed hydromechanical transmissions Minsk Nauka i Technica 1990 256