Modeling of a Wedge Clutch in an Automatic Transmission

Yao, Jian; Chen, Li; Yin, Chengliang; Shu, Ji; Zheng, Xin; Lee, Chunhao; Dong, Yu Cai; Kao, Chi-Kuan; Hebbale, Kumaraswamy; Samie, Farzad

doi:10.4271/2010-01-0186

Cited by 9 publications

(15 citation statements)

References 3 publications

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“…Another assumption, if the moving direction of the actuated component is upward in Figure 1, is the direction of the friction force that is reversed. The relationship in (3) is replaced by (4), in which the magnitude of the friction force is always smaller than that of the actuation force. So the actuation force is weakened in this case, which should be avoided in the design of a wedge-based actuator.…”

Section: Principle Of the Wedge Mechanismmentioning

confidence: 99%

“…Various electrmechanical components have been designed for clutch actuators in automatic manual transmission [1], dual clutch transmission [2,3], and so forth. Among these, the wedge-based clutch actuator, featuring selfreinforcement function [4], offers good opportunity to obtain large normal force by small actuation force. Therefore, the wedge clutch can be space-saving and energy-saving and satisfy the requirement of automotive electronics applications relying on the low voltage batteries [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The clutch actuator using rack and pinion as wedge mechanism was proposed for automated manual transmission [7]. A wedge mechanism with worm shaft and worm gear was studied for automatic transmission [8].…”

Section: Introductionmentioning

confidence: 99%

“…The magnitude of the friction force generated by the wedge actuator is associated with factors such as the wedge angle, friction coefficient, actuation force, and the clutch slipping speed [8]. Theoretically, the self-reinforcement ratio can be positive or negative and can be larger or less than 1, depending on the value of those factors.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Stability Analysis of Wedge Clutch System

Yao

Chen

Yin

2014

Mathematical Problems in Engineering

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A wedge clutch with unique features of self-reinforcement and small actuation force was designed. Its self-reinforcement feature, associated with different factors such as the wedge angle and friction coefficient, brings different dynamics and unstable problem with improper parameters. To analyze this system, a complete mathematical model of the actuation system is built, which includes the DC motor, the wedge mechanism, and the actuated clutch pack. By considering several nonlinear factors, such as the slip-stick friction and the contact or not of the clutch plates, the system is piecewise linear. Through the stability analysis of the linearized system in clutch slipping phase, the stable condition of the designed parameters is obtained asα>arctan⁡(μc). The mathematical model of the actuation system is validated by prototype testing. And with the validated model, the system dynamics in both stable and unstable conditions is investigated and discussed in engineering side.

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Section: Principle Of the Wedge Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling and Stability Analysis of Wedge Clutch System

Yao

Chen

Yin

2014

Mathematical Problems in Engineering

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“…Therefore, the actuation motor has to generate a force to counter the undesired force from magnet at the open position, which will draw additional energy consumption. Yao et al 4,[15][16][17] designed a wedge-based clutch for automatic transmission, aiming to utilizing the self-reinforcement property from the wedge feature. Kim and Choi 10,18 designed a wedge mechanism for an AMT clutch.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation study of a novel electromechanical clutch actuation system

Liu

Chen

et al. 2017

Advances in Mechanical Engineering

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A novel motor-driven clutch actuator with force-aided lever has been recently developed. A unique spring is used to assist apply of the clutch that can effectively reduce the motor power requirement, and the actuation system can save power consumption during clutch operations with faster response and higher control precision. In this article, a mathematical model of the conceptual clutch actuation system is developed to study the dynamic behavior of the actuator system via computer simulation. The actuator model is further integrated into a dual-clutch transmission and driveline system to demonstrate the effectiveness of the concept in shifting control. The simulation result demonstrates the smooth and fast clutch-to-clutch gear shift and hence validates the feasibility of this new force-aided lever actuation system.

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Stability and response of a self-amplified braking system under velocity-dependent actuation force

Chen

2014

Nonlinear Dyn

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Modeling of a Wedge Clutch in an Automatic Transmission

Cited by 9 publications

References 3 publications

Modeling and Stability Analysis of Wedge Clutch System

Modeling and Stability Analysis of Wedge Clutch System

Modeling and simulation study of a novel electromechanical clutch actuation system

Stability and response of a self-amplified braking system under velocity-dependent actuation force

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