Battery electric vehicles (BEV) equipped with two-speed automatic mechanical transmission (AMT) have gained increasing popularity owing to advantages of a widened high-efficiency operation zone and system costs. In this study, a combined gear shift control strategy including a segmented speed regulation control and torque recovery control was developed for a two-speed AMT in BEV. The switching point of proportional integral control and sliding mode control during speed regulation process is adaptively optimized to ensure minimization of the shift time, while the maximum vehicle jerk is controlled within a defined range. The effectiveness of proposed control strategy is verified by a test bench. Results show that proposed control strategy can not only ensure the impact degree fluctuates within a predetermined range, but also achieve fast and accurate speed regulation which can reduce the speed regulation time by 17%–33%.
ChanCCBouscayrolAChenK.Electric, hybrid, and fuel-cell vehicles: architectures and modeling. IEEE Trans Vehicular Technol2010; 59(2): 589–598.
2.
RoozegarMAngelesJ.The optimal gear-shifting for a multi-speed transmission system for electric vehicles. Mech Mach Theory2017; 116: 1–13.
3.
TianYRuanJZhangN, et al. Modelling and control of a novel two-speed transmission for electric vehicles. Mech Mach Theory2018; 127: 13–32.
4.
ZhuBZhangNWalkerP, et al. Two-speed DCT electric powertrain shifting control and rig testing. Adv Mech Eng2013; 5: 323917.
5.
RuanJWalkerPDWuJ, et al. Development of continuously variable transmission and multi-speed dual-clutch transmission for pure electric vehicle. Adv Mech Eng2018; 10(2): 1687814018758223.
6.
RuanJWalkerPZhangN.A comparative study energy consumption and costs of battery electric vehicle transmissions. Appl Energy2016; 165: 119–134.
7.
GaoBLiangQXiangY, et al. Gear ratio optimization and shift control of 2-speed I-AMT in electric vehicle. Mech Syst Signal Process2015; 50-51: 615–631.
8.
YuC-HTsengC-Y.Research on gear-change control technology for the clutchless automatic–manual transmission of an electric vehicle. Proc IMechE Part D: J Automobile Engineering2013; 227(10): 1446–1458.
9.
TianYZhangNZhouS, et al. Model and gear shifting control of a novel two-speed transmission for battery electric vehicles. Mech Mach Theory2020; 152: 103902.
10.
FangSSongJSongH, et al. Design and control of a novel two-speed uninterrupted mechanical transmission for electric vehicles. Mech Syst Signal Process2016; 75: 473–493.
11.
YuJYaoLRenC, et al. Design, analysis, and experimental validation of a novel seamless automatic transmission for electric vehicle. Adv Mech Eng2018; 10(2): 1687814018760021.
12.
SorniottiAHoldstockTPiloneGL, et al. Analysis and simulation of the gearshift methodology for a novel two-speed transmission system for electric powertrains with a central motor. Proc IMechE Part D: J Automobile Engineering2012; 226(7): 915–929.
13.
KwonKSeoMMinS.Efficient multi-objective optimization of gear ratios and motor torque distribution for electric vehicles with two-motor and two-speed powertrain system. Appl Energy2020; 259: 114190.
14.
NguyenCTWalkerPDZhangN.Optimization and coordinated control of gear shift and mode transition for a dual-motor electric vehicle. Mech Syst Signal Process2021; 158: 107731.
15.
LiangJYangHWuJ, et al. Power-on shifting in dual input clutchless power-shifting transmission for electric vehicles. Mech Mach Theory2018; 121: 487–501.
16.
LiuHLeiYLiZ, et al. Gear-shift strategy for a clutchless automated manual transmission in battery electric vehicles. SAE Int J Commer Veh2012; 5(1): 57–62.
17.
PangBHongJGaoB, et al. Shift quality amelioration of EV with AMT by speed regulation. IFAC-PapersOnLine2018; 51(31): 910–917.
18.
WalkerPDFangYZhangN.Dynamics and control of clutchless automated manual transmissions for electric vehicles. J Vib Acoust2017; 139(6): 061005.
19.
ShyamAFebin DayaJL.A comparative study on the speed response of BLDC motor using conventional PI controller, anti-windup PI controller and fuzzy controller. In: 2013 International conference on control communication and computing (ICCC), Thiruvananthapuram, India, 13–15December2013. New York: IEEE.
20.
ZhuXZhangHXiJ, et al. Optimal speed synchronization control for clutchless AMT systems in electric vehicles with preview actions. In: Proceedings of the American control conference, Portland, OR, 4–6June2014, pp.4611–4616. New York: IEEE.
21.
ChaiBZhangJWuS.Robust shifting control of a motor-transmission integrated system considering anti-jerking and speed regulation for electric vehicles. IET Intell Transp Syst2019; 13(1): 141–152.
22.
TanSYangJKhajepourA, et al. H-infinity shifting control in a dual-speed transmission for electric vehicle. Int J Autom Technol2021; 22(1): 155–164.
23.
CaoWWuYChangY, et al. Speed synchronization control for integrated automotive motor-transmission powertrains over CAN through a co-design methodology. IEEE Access2018; 6: 14106–14117.
24.
HuangWHuangJYinC.Speed regulation control for an integrated motor-transmission system under external disturbances. World Electr Veh J2020; 11(3): 53.
25.
HuangJZhangJHuangW, et al. Optimal speed synchronization control with disturbance compensation for an integrated motor-transmission powertrain system. J Dyn Syst Meas Control2019; 141(4): 041001.
26.
TsengC-YYuC-H.Advanced shifting control of synchronizer mechanisms for clutchless automatic manual transmission in an electric vehicle. Mech Mach Theory2015; 84: 37–56.
27.
LiangJYangHWuJ, et al. Shifting and power sharing control of a novel dual input clutchless transmission for electric vehicles. Mech Syst Signal Process2018; 104: 725–743.
28.
HuJSunCXiaoJ, et al. A torque compensation strategy in two-speed automated mechanical transmission shift process for pure electric vehicles. Adv Mech Eng2015; 7(11): 1687814015616915.
