AUTOMATIC TRANSMISSIONS: TECHNOLOGY “CLUTCH-TO-CLUTCH SHIFTS” — HISTORY AND CURRENT STATUS

KRASNEVSKIY Leonid G., Corresponding Member of the NAS of Belarus, D. Sc. in Eng., Prof., Chief Research Scientist, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BELEVICH Alexander V., Director of R&D Center “Electromechanical and Hybrid Power Units of Mobile Machines” – Head of the Laboratory of Onboard Mechatronic Systems of Mobile Machines, Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The current state of technology of control of transient processes in automatic transmissions (AT) and integrated power units with AT by means of coordinated control of slipping clutches without a power flow gap is considered. The stages of development, revealing the logic of improving technology in general, its main differences from the previous ones are presented. The main components (phases of the transient process of the switching of the AT stages, identification of the moment of the stoppage of the friction piston, the characteristics of the algorithms complexes, the principles of precision control, etc.) are considered. Based on the analysis of a large volume of foreign publications, the results obtained by the world leading manufacturers of ATs in this direction are summarized. In the Russian language they are mainly published for the first time and are considered in the paper as the established new basic control technology for AT – “CTC technology” (originally – “Clutch-to-Clutch Shifts” technology).

mobile cars, automatic transmissions, mechatronic control systems, switching technology of “Clutch-to-Clutch Shifts” stages

• Poddubko S.N., Krasnevskiy L.G. Upravlenie dinamikoj perehodnyh processov avtomobilnyh silovyh ustanovok s avtomatizirovannymi privodami: sovremennaja teorija i tehnika [Control of the dynamics of transient processes in automotive
  power plants with automated drives: modern theory and technology]. Trudy OIM NAN Belarusi “Aktualnye voprosy mashinovedenija” [Proc. of the Joint Institute of Mechanical Engineering of the NAS of Belarus “Topical Issues of
  Mechanical Engineering”], 2017, no. 6, pp. 66–75.
• Narbut A.N., Shapko V.F., Arkhipov A.I. Mehanizmy plavnogo perekljuchenija peredach v transmissijah avtomobilej [Mechanisms of a smooth gear change in transmissions of cars]. Moscow, NIINAvtoprom, 1982. 37 p.
• Transmission and controls. Patent US, no. 3505907, 1970.
• The CLBT 9680 an automatic transmission for off-highway vehicles. SAE Technical Paper, 1980.
• Digital electronic controls for Detroit Diesel Allison offhighway transmissions, SAE Technical Paper.
• Development of A New Clutch-to-Clutch Shift Control Technology. SAE Technical Paper, 2002.
• Zongxuan Sun, Kumar Hebbale Challenges and Opportunities in Automotive Transmission Control. Proc. American Control Conference. Portland, 2005.
• Control method of clutch-to-clutch powered downshift in an automatic transmission. Patent US, no. 5029494, 1991.
• State detecting device for load element receiving load of working fluid and state detecting device for fluid pressure control circuit. Patent US, no. 7159506, 2007.
• Adaptive pressure control method for achieving synchronous upshifts in a multiple-ratio transmission. Patent US, no. 6994647, 2006.
• Adaptive on-coming clutch fill control for automatic transmission. Patent US, no. 6292732, 2001.
• Clutch fill control of an automatic transmission for heavy-duty vehicle applications. Mechanical Systems and Signal Processing, 2015, vol. 64–65, pp. 16–28.
• Development of smooth up-shift control technology for automatic transmissions with integrated control of engine and automatic transmissions. SAE Technical Paper, 2007.
• Virtual Clutch Controller for Clutch-to-Clutch Shifts in Planetary-Type Automatic Transmission. Research Article. Mathematical Problems in Engineering, vol. 2015. Available at: http://dx.doi.org/10.1155/2015/213162/.
• Krasnevskiy L.G., Poddubko S.N. Precizionnoe upravlenie avtomaticheskimi transmissijami: itogi 50 let razvitija [Precision control of automatic transmissions: the results of 50 years of development]. Mehanika mashin, mehanizmov i materialov [Mechanics of Machines, Mechanisms and Materials], 2015, no. 4, pp. 5–13.
• Two-Degree-of-Freedom Controller Design for Clutch Slip Control of Automatic Transmission. SAE Technical Paper, 2008.
• New Torque Converter Clutch Friction Material Bench Test Screening Procedure. SAE Technical Paper, 2009.
• Bryant M.D. Hydrodynamic Lubrication. Lecture Series, ME 383S. Available at: http://www.me.utexas.edu/~bryant/courses/me383s/DownloadFiles/LectureNotes/HydrodynamicLubr.pdf/.
• Estimation of Wet Clutch Friction Parameters in Automotive Transmissions. SAE Technical Paper, 2015.
• Cost, Effectiveness and Deployment of Fuel Economy Technologies for Light-Duty Vehicles. The National Academies Press. Available at: http://www.nap/edu21744/.
• Ksendzov V.N. Issledovanie i vybor rezhimov perekljuchenija peredach kolesnogo traktora pod nagruzkoj. Diss. kand. tehn. nauk [Research and selection of modes of gearshift of the wheeled tractor under load. Extended Abstract of Ph. D. Thesis]. Minsk, 1979.