![]() ![]() Prior to the rise in popularity of DCT transmissions, manufacturers experimented with automated manual transmissions (AMT). The dual-clutch transmission (DCT) takes old-school manual transmission technology to the next level. Therefore, without the shifting of gears, there is no rpm drop, and the engine can be programmed to remain in its most fuel-efficient power range all the time. The CVT employs a sophisticated, continuously variable metal belt system that varies the gear ratios without actually changing gears. It is this drop in engine rpm that creates a moment where fuel economy suffers as the engine is temporarily moved out of its most fuel-efficient range.Įnter the continuously variable transmission (CVT), an idea that has been around for a while but was forced into the mainstream by manufacturers looking for a way to recover the lost fuel efficiency that occurs every time the typical automatic transmission shifts gears. The downside is that as your automatic transmission shifts gears, a noticeable drop in engine speed occurs. Accordingly, automatic transmissions started out with two or three speeds and now regularly have 10. Bicycles have evolved from the single fixed-gear units of my childhood to modern bikes with 18 speeds. Jianguo Z, Yulong L, Hongbo L et al (2010) Rapid control prototype of dry dual clutch transmission and platform test.The key takeaway for this style of transmission is that all the gear ratios are fixed, and the only way to introduce a wider gear-ratio range is to physically add additional gear sets. ![]() Mech Sci Technol Aerosp Eng 30(2):270–274Ĭheng Y, Dong P, Yang S et al (2015) Virtual clutch controller for clutch-to-clutch shifts in planetary-type automatic transmission. Zhenjun L, Fei L, Xiaohong D et al (2011) Analysis of the transmission scheme of a dual clutch transmission. Kim N, Lohse-Busch H, Rousseau A (2014) Development of a model of the dual clutch transmission in autonomie and validation with dynamometer. Hurley S, Tipton CD, Cook SP (2006) Lubricant technology for dual clutch transmissions. Xi L, Xiusheng C, Wei F (2011) Optimal control of gearshift in wet dual-clucth automatic transmission. Senatore A (2009) Advances in the automotive systems: an overview of dual-clutch transmissions. Mech Sci Technol Aerosp Eng 32(3):410–415 Zhixuan J, Yongfu D, Yougang G (2013) Simulating start of wet dual clutch automatic transmission. Mechatronics 11:29–36Ĭlark KS, Singh T, Buffa RP et al (2015) General motors front wheel drive seven speed dry dual clutch automatic transmission. Jialin S, Zhenjun L, Datong Q (2009) Anti-interference design of hardware of dual-clutch automatic transmission. Zhenjun L, Datong Q, Ming Y et al (2005) Analysis of double clutch automatic transmission for vehicles. Yang Y, Lam RC (1998) Theoretical and experimental studies on the interface phenomena during the engagement of automatic transmission clutch. Mech Drive 29(3):56–58īerger EJ, Sadeghi F, Krousgrill CM (1997) Torque transmission characteristics of automatic transmission wet clutches: experimental results and numerical comparison. Chongbo J, Shihua Y, Xiaolin G (2005) Analysis of dual clutch transmission and its application prospect. ![]()
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