A New Control Strategy of Wet Dual Clutch Transmission (DCT) Clutch and Synchronizer for Seamless Gear Preselect

2013 ◽  
Vol 6 (2) ◽  
pp. 535-551 ◽  
Author(s):  
Mohammad Adhitya ◽  
Rashad Mustafa ◽  
Artur Plötner ◽  
Ferit Küçükay
Keyword(s):  
Control Strategy ◽  
Dual Clutch Transmission

Downshifting Control Strategy for Dual Clutch Transmission With Single Clutch Slippage

2016 ◽  
Author(s):  
Jikai Liu ◽  
Biao Ma ◽  
Heyan Li ◽  
Man Chen ◽  
Jianwen Chen
Keyword(s):  
Control Strategy ◽  
Control Strategies ◽  
Bench Test ◽  
Dual Clutch Transmission ◽  
Pressure Profiles ◽  
Simulation Results ◽  
And Control ◽  
Engagement And Disengagement ◽  
External Loads ◽  
Good Agreement

The cooperation mode between the engagement and disengagement clutches for vehicles equipped with Dual Clutch Transmission (DCT) is of vital importance to achieve a smooth gearshift, in particular for the downshift process as its unavoidable power interruption during the inertia phase. Hence, to elevate the performance of DCT downshifting process, an analytical model and experimental validation for the analysis, simulation and control strategy are presented. Optimized pressure profiles applied on two clutches are obtained based on the detailed analysis of downshifting process. Then, according to the analysis results, a novel control strategy that can achieve downshift task with only one clutch slippage is proposed. The system model is established on Matlab/Simulink platform and used to study the variation of output torque and speed in response to different charging pressure profiles and various external loads during downshifting process. Simulation results show that, compared with conventional control strategies, the proposed one can not only avoid the torque hole and power circulation, but shorten the shift time and reduce the friction work. Furthermore, to validate the effectiveness of the control strategy, the bench test equipped with DCT is conducted and the experiment results show a good agreement with the simulation results.

A Test Study of Wet Dual Clutch Transmission during Vehicle Launch

2012 ◽  
Vol 490-495 ◽  
pp. 86-90
Author(s):  
Wei Sun ◽  
Yu Long Hua ◽  
Guo Qiang Liu
Keyword(s):  
Control Strategy ◽  
Dual Clutch Transmission ◽  
Evaluation Indexes ◽  
Slipping Friction ◽  
Test Study ◽  
Experimental Vehicle ◽  
Clutch Control

This paper focuses on the model and analysis of wet dual clutch transmission (DCT) during vehicle launch. Two evaluation indexes, slipping friction work and degree of jerk, is presented, and a single clutch control strategy is established and has been validated after applied for an experimental vehicle equipped with a wet dual clutch transmission.

A robust torque control approach for gear shift of a parallel hybrid electric vehicle with dual clutch transmission

2020 ◽  
Vol 68 (5) ◽  
pp. 399-405
Author(s):  
Sooyoung Kim ◽  
Seibum Choi
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Hybrid Electric Vehicle ◽  
Internal Combustion Engines ◽  
Torque Control ◽  
Dual Clutch Transmission ◽  
Control Approach ◽  
Shift Quality ◽  
Smoothing Effects ◽  
Hybrid Electric

This article proposes a robust control strategy for gear shifts of a parallel-type hybrid electric vehicle (HEV) equipped with a dry dual clutch transmission (DCT). A vehicle equipped with DCT requires accurate torque transfer control through the driveline during gear shifts to ensure good shift quality in the absence of smoothing effects from torque converter. Unlike conventional vehicles driven only by internal combustion engines, a HEV can utilize the drive motor to improve its gear shifting performances. In this article, an integrated torque and speed control strategy is developed to minimize the driveline oscillations that occur during gear shifts and to complete the shift as fast as the driver wants. A robust H-infinity controller is designed to control transmission output torque as well as clutch slip speed, particularly in inertia phase that mostly determines the total shift quality. The effectiveness of the proposed control strategy as well as its robustness is verified by comparative studies using a proven vehicle model developed in MATLAB/SimDriveline.

Down-Shift Control for Wet Dual Clutch Transmission Based on FCMAC

2013 ◽  
Vol 753-755 ◽  
pp. 1800-1803
Author(s):  
Chun Hua Xu
Keyword(s):  
Intelligent Control ◽  
Control Strategy ◽  
Control Unit ◽  
Control Program ◽  
Cerebellar Model Articulation Controller ◽  
Accuracy Control ◽  
Dual Clutch Transmission ◽  
Transmission Control ◽  
Gear Shift ◽  
Shift Control

In order to solve the problems existed in gearshift with wet dual clutch transmission; the down-shift control strategy is developed on the basis of analysis on gear shift process. Clutch pressure intelligent control arithmetic based on FCMAC (Fuzzy Cerebellar Model Articulation Controller) is designed to realize accuracy control of clutch pressure. The transmission control unit is designed, and the control program is written. Taking down-shift from 2 to 1 for example, down-shifting control strategy was drawn. After applied the introduced method into the experiments on both power-on and power-off downshift under different throttle positions, ideal shifting quality was achieved. The result indicated that the speed of vehicle changed gently without distinct impact. This essay verifies the validity of the proposed method of the strategy of shifting control.

scholarly journals Sliding Mode Variable Structure Control and Real-Time Optimization of Dry Dual Clutch Transmission during the Vehicle’s Launch

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
Zhiguo Zhao ◽  
Haijun Chen ◽  
Qi Wang
Keyword(s):  
Control Strategy ◽  
Sliding Mode ◽  
Variable Structure ◽  
Dual Clutch Transmission ◽  
Structure Control ◽  
Vehicle Velocity ◽  
Coordinating Control ◽  
Sliding Mode Variable Structure ◽  
Driver’S Intention ◽  
Real Time Optimization

In order to reflect driving intention adequately and improve the launch performance of vehicle equipped with five-speed dry dual clutch transmission (DCT), the issue of coordinating control between engine and clutch is researched, which is based on the DCT and prototype car developed independently. Four-degree-of-freedom (DOF) launch dynamics equations are established. Taking advantage of predictive control and genetic algorithm, target tracing curves of engine speed and vehicle velocity are optimally specified. Sliding mode variable structure (SMVS) control strategy is designed to track these curves. The rapid prototyping experiment and test are, respectively, conducted on the DCT test bench and in the chassis dynamometer. Results show that the designed SMVS control strategy not only effectively embodies the driver’s intention but also has strong robustness to the vehicle parameter’s variations.

Control strategy optimization for a dual-clutch transmission downshift with a single slipping clutch during the torque phase

2017 ◽  
Vol 232 (5) ◽  
pp. 651-666 ◽  
Author(s):  
Jikai Liu ◽  
Biao Ma ◽  
Heyan Li ◽  
Man Chen ◽  
Guoqiang Li
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Control Strategies ◽  
Poor Quality ◽  
Dual Clutch Transmission ◽  
Flow Conditions ◽  
Robust Controller ◽  
Simulation Results ◽  
The Relationship ◽  
Good Agreement

During the torque phase, appropriate coordination between two clutches is of vital importance to the dual-clutch transmission so that a high-quality shift is achieved without clutch interaction and engine flare, because a poor-quality shift definitely extends the shift time and increases the friction work. Concerning this problem, two different power flow conditions during the torque phase are discussed in detail, after investigation of the dual-clutch transmission downshift process and the design of an H∞ robust controller for the inertia phase. The results obtained indicate that, if two clutches are slipping simultaneously during the torque phase, either power interruption or power circulation occurs. Thus, by optimizing the relationship between the two clutches, a novel control strategy is proposed for the dual-clutch transmission so that the downshift process is accomplished with only one slipping clutch, in order to obtain the highest system efficiency. The system model was established on the MATLAB/Simulink platform and used to study the variations in the torque and the speed output in response to different control strategies. The simulation results show that, with the smooth inertia phase guaranteed by the robust controller, the proposed control strategy not only can avoid power interruption or power circulation during the torque phase but also can shorten the shift time (from 1.1 s to 0.8 s) and reduce the jerk level (from 6.8 m/s3 to 5.7 m/s3) effectively, in comparison with the conventional control strategy. Finally, to validate the effectiveness of the proposed control strategy, bench tests on a dual-clutch transmission were carried out, and the test data obtained show good agreement with the simulation results.

Adaptive Switch Control of Synchronizer for Dual Clutch Transmission

2015 ◽  
Vol 742 ◽  
pp. 500-504
Author(s):  
Hong Kui Li ◽  
Tong Li Lu ◽  
Jian Wu Zhang
Keyword(s):  
Dynamical System ◽  
Mathematical Model ◽  
Control Strategy ◽  
Control Method ◽  
Hybrid Dynamical System ◽  
Dual Clutch Transmission ◽  
Synchronization Process ◽  
Switch Control ◽  
Simulation Results ◽  
Adaptive Switch

This paper focuses on developing a novel control strategy of synchronizer for dual clutch transmission. The synchronization process is investigated and a mathematical model of synchronizer is proposed. The paper proposes a switch control method for synchronizer which is a hybrid dynamical system. The simulation results demonstrate that the performance of the switch controller is reasonable and effective.

scholarly journals Fuzzy Determination of Target Shifting Time and Torque Control of Shifting Phase for Dry Dual Clutch Transmission

2014 ◽  
Vol 2014 ◽  
pp. 1-19 ◽  
Author(s):  
Zhiguo Zhao ◽  
Haijun Chen ◽  
Yunyun Yang
Keyword(s):  
Control Strategy ◽  
Engine Speed ◽  
Torque Control ◽  
Fuzzy Decision ◽  
Dual Clutch Transmission ◽  
Dynamics Model ◽  
Simulink Simulation ◽  
Intermediate Shaft ◽  
Coordinating Control

Based on the independently developed five-speed dry dual clutch transmission (DDCT), the paper proposes the torque coordinating control strategy between engine and two clutches, which obtains engine speed and clutch transferred torque in the shifting process, adequately reflecting the driver intention and improving the shifting quality. Five-degree-of-freedom (DOF) shifting dynamics model of DDCT with single intermediate shaft is firstly established according to its physical characteristics. Then the quantitative control objectives of the shifting process are presented. The fuzzy decision of shifting time and the model-based torque coordinating control strategy are proposed and also verified by simulating under different driving intentions in up-/downshifting processes with the DCT model established on the MATLAB/Simulink. Simulation results validate that the shifting control algorithm proposed in this paper can not only meet the shifting quality requirements, but also adapt to the various shifting intentions, having a strong robustness.

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