機(jī)械自動(dòng)化專業(yè)外文翻譯--雙離合變速器換擋動(dòng)力學(xué)及控制系統(tǒng)分析（英文）

1、Shift dynamics and control of dual-clutch transmissionsManish Kulkarni, Taehyun Shim, Yi Zhang *Department of Mechanical Engineering, University of Michigan-Dearborn, Dearborn MI 48128, United StatesReceived 4 October 20

2、05; accepted 1 March 2006 Available online 18 May 2006AbstractShifts in a dual-clutch transmission (DCT) are realized by torque transfer from one clutch to another without traction interruption due to the controlled slip

3、page of the clutches. The timing of engagement and disengagement of the two clutches is critical for achieving a smooth shift without engine flare and clutch tie-up. This paper presents an analytical model for the simula

4、tion, analysis and control of shift dynamics for DCT vehicles. A dynamic model and the control logic for the integrated vehicle have been developed using Matlab/Simulink as the simulation platform. The model has been use

5、d to study the variation in output torque in response to different clutch pressure profiles during shifts. Optimized clutch pres- sure profiles have been created for the best possible shift quality based on model simulat

6、ion. As a numerical example, the model is used for a DCT vehicle to simulate the wide-open throttle performance. Vehicle launch and shift process are both simulated to assess transmission shift quality and validate the e

7、ffectiveness of the shift control. ? 2006 Elsevier Ltd. All rights reserved.Keywords: Dual-clutch transmission; Automatic transmissions1. IntroductionThere has been a clear trend in the automotive industry in recent year

8、s towards increased ride comfort and fuel efficiency. As the power transmission unit, transmissions play an important role in vehicle performance and fuel economy. There are currently several types of transmissions and t

9、he associated technologies that offer different performance priorities when fit into a vehicle [1]. Manual transmissions have an overall efficiency of 96.2%, which is the highest efficiency value for any type of transmis

10、sion. Current production automatics have been improved to provide an efficiency of not more than 86.3%. Belt type CVT’s have an overall efficiency of 84.6%, however, the major advantage of CVT is that it allows the engin

11、e to operate in the most fuel-efficient man- ner [2]. Automated manual transmissions have the same efficiency of manual transmissions and offer operation convenience similar to conventional automatic transmissions. There

12、 exist two technically feasible designs for automated lay-shaft gearing transmissions. One uses a single clutch and is basically a manual transmission with an added-on control unit that automates the clutch and shift ope

13、rations. In this design, there is an interruption of0094-114X/$ - see front matter ? 2006 Elsevier Ltd. All rights reserved. doi:10.1016/j.mechmachtheory.2006.03.002* Corresponding author. Tel.: +1 313 593 5539. E-mail a

14、ddress: anding@umich.edu (Y. Zhang).Mechanism and Machine Theory 42 (2007) 168–182www.elsevier.com/locate/mechmtMechanism and Machine Theory? The engine output torque is interpolated in terms of the throttle angle and RP

15、M from the engine map. ? Gears have no backlash. ? All the mechanical losses are modeled as a part of the vehicle drag. ? Delays due to hydraulic actuation system are not considered. ? Clutches are modeled as Coulomb fri

16、ction elements. ? Temperature effects of the drivetrain are neglected.CL2 CL1SYN5R SYN6SYN13 SYN244 2 3 1Input ShaftOutput6 R 5Final Drive Pinion 2Final Drive Pinion 1 Intermediate Shaft 1Intermediate Shaft 2SYN5R SYN6S

17、YN13 SYN24Input ShaftOutput6 R 5SYN5R SYN6SYN13 SYN24Input ShaftOutput6 R 5Final Drive Pinion 2Final Drive Pinion 1 Intermediate Shaft 1Intermediate Shaft 2Fig. 1. DCT stick diagram.4Output Shaft4RCL1CL21 3 1 26 5Input