Wet Single Clutch Engagement Behaviors in the Dual-Clutch Transmission System

Cho, Jaecheol; Lee, Yongseok; Kim, Woojung; Jang, Siyoul

doi:10.1007/s12239-018-0045-9

Cited by 24 publications

(7 citation statements)

References 9 publications

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“…The contraption change can be begun normally, copying the value of a standard customized gearbox and utilizing an electronic control structure. On the other hand, the device change can be constrained by the driver by methods for a 'Tiptronic-style' adjust switch setup, thusly rehashing the convenience of a mechanized or grasp less manual gearbox [10]. The twin weight driven holds are regularly packaged together as a singular unit, and the entire gear move is controlled normally by the electronic control unit, which controls the initiation of the grip hydrodynamics.…”

Section: Dct -Workingmentioning

confidence: 99%

A Study on Dual Clutch Transmission

Patnaik¹,

Tjprc²

2019

IJMPERD

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Aim of this paper is to ponder the double grasp transmission in detail. A Dual grip transmission (DCT) is a kind of customized transmission, included with a twofold handle module and two data shafts. A DCT can give a magnificent gear moving with a mechanical assembly pre-decision method and covering of handle responsibility.The device pre-decision procedure suggests that the synchronization of the moving toward mechanical assembly has been done before the genuine device moving method starts. Additionally, on account of the covering segment of the two grasps, torque is traded from the engine to the driving wheels without impedance in the midst of outfit moving. the two goals determined beforehand. The displayed control law is realized in an immediate 9 control system that unequivocally disengages the controlling of the two handles. The displayed control procedure can be associated with a broad assortment of usages with straightforward execution and a tolerable energy. PC propagations in Simulink showed that the control objectives were recognized with a fiery and tolerably essential controller. According to the amusement results, the ordinary degrees of the yield torques were diminished by 32.5% with the assistance of the proposed handle to-hold control law. Similarly, by viewing a couple of contrast re-institutions, we found that the yield torque refinement ended up greater as the grip actuator time reliable wound up greater. Moreover, re-sanctioning outcomes exhibited that tinier handle weight changing rate added to a smoother adjust moving. In this manner, it gives a quick mechanical assembly moving without yielding eco-kind disposition and riding comfort. In development, with an unquestionably figured and definitely controlled slippage of the twofold handle module, the DCT can give a speedy and smooth apparatus moving. The execution of a DCT in the midst of outfit moving relies upon a specially created handle duty controller. An average handle responsibility controller should have the ability to achieve (1) a snappy hold to-get a handle on moving and (2) a smooth mechanical assembly moving without detectable torque agitating impact. This investigation work proposes an as of late laid out handle to-hold moving controller that satisfies

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Section: Dct -Workingmentioning

confidence: 99%

A Study on Dual Clutch Transmission

Patnaik¹,

Tjprc²

2019

IJMPERD

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“…Yu L. et al [14] established the calculation model of the average specific pressure and torque within the interfaces of multifriction pairs, obtained the attenuation coefficient of the specific pressure of the multifriction pairs, and analyzed the sensitivities of the parameters that affected the specific pressure attenuation for the clutch by considering the frictional force of the spline. Cho J. et al [15] analyzed the frictional torque during the wet clutch engagement, considering sliding contact between the friction disc and the steel separator. Hu H. W. et al [16] constructed a state space equation of the tracking control system based on a clutch actuator model and designed the sliding mode controller to improve the tracking control quality of the clutch actuator during engagement.…”

Section: State Of the Artmentioning

confidence: 99%

Pressure Control Method of an Electro-hydraulic Actuated Clutch Considering Hysteresis

Zhou¹,

Xue²,

Xiao³

2019

JESTR

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The nonlinear hysteretic characteristics of a wet clutch's pressure control valve in dual clutch transmission (DCT) can cause pressure response delay, which affects pressure control accuracy. This study proposed a compound control method for hysteresis compensation based on the analysis of the nonlinear hysteretic characteristics of the electrohydraulic pressure control valve to reveal the influence mechanism of hysteresis on the wet clutch and to improve pressure control accuracy. The compound control method included a feed-forward controller and an additional feedback controller. The pressure hysteresis of the electrohydraulic pressure control valve was analyzed through mathematical modeling of the valve spool. Two experiments were designed to verify and characterize the pressure hysteresis. The feed-forward control algorithm for hysteresis compensation combined with the proportional-integral-derivative (PID) controller was formulated to realize pressure control based on the characteristics of the wet clutch's pressure hysteresis. The feasibility and effectiveness of the proposed control method were verified through bench tests. Results show that the average absolute error in steady state reduces from 0.186 bar to 0.005 bar under the proposed control method. The average relative error decreases from 2.924% to 0.092% compared with the system without any pressure control. In addition, the use of the proposed control method in dynamic working condition reduces the average absolute error from 0.189 bar to 0.043 bar and decreases the average relative error from 2.963% to 0.722% compared with the system without any pressure control. The proposed control method under the state with step pressure input can guarantee the system response speed and control accuracy. Finally, the comparison of compound control, feed-forward control, and PID control shows that the compound control method can achieve optimum performance in pressure tracking regardless of the test conditions. This study provides an easy-to-implement and high-precision method for pressure control of automotive wet clutches.

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“…Meanwhile, the separate plates, as the driven part, transfer the input power to the transmission system. Finally, the dynamic friction of spline teeth converts to static friction after the gap is eliminated [17]. This paper is devoted to investigating the effect of spline friction on the contact pressure and FT of friction components.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Studies of the Attenuation Characteristics of Friction Torque in a Wet Multidisc Clutch

et al. 2021

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A numerical model is proposed to calculate both the contact pressure and the friction torque (FT) of the friction components considering the spline friction in a wet multidisc clutch, which is verified by the bench test. The results indicate that the spline friction of components is an important factor causing the axial attenuation of contact pressure on friction pairs. As the applied pressure increases, the attenuation amplitude of contact pressure increases gradually. In addition, the average single-pair FT decreases with the increasing number of friction pairs, thus leading to the decrease of the growth rate of total FT. Therefore, when the number of friction pairs reaches a certain number, it is not reliable to obtain a good torque enhancement, indicating that the effect of spline friction needs to be weakened to reduce the attenuation of contact pressure.

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Wet Single Clutch Engagement Behaviors in the Dual-Clutch Transmission System

Cited by 24 publications

References 9 publications

A Study on Dual Clutch Transmission

A Study on Dual Clutch Transmission

Pressure Control Method of an Electro-hydraulic Actuated Clutch Considering Hysteresis

Numerical and Experimental Studies of the Attenuation Characteristics of Friction Torque in a Wet Multidisc Clutch

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