Simulation model of an electrohydraulic-actuated double-clutch transmission vehicle: modelling and system design

Schoeftner, Jürgen; Ebner, Wolfgang

doi:10.1080/00423114.2017.1337207

Cited by 10 publications

(6 citation statements)

References 18 publications

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“…In both Figures 12 and 13, time zero corresponds to the first contact of the pressure plate and clutch disc ('kiss point'). 35 At this time, there is a nominal clamping force of 70 N and friction torque is generated between the components. The corresponding time histories for engine and friction torque are shown in Figure 14.…”

Section: Transient Torsional Clutch Model Resultsmentioning

confidence: 99%

Noise, vibration and harshness during dry clutch engagement oscillations

Minas

Morris

Theodossiades

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Determining the root causes of various noise, vibration and harshness phenomena in modern automotive drivetrains is a critical task for industry, since noise, vibration and harshness issues often result in worsened driving experience. The aim of the current research is to investigate the dynamics during dry clutch engagement and the associated – often problematic – oscillations. This paper reports the development and partial validation of numerical models to study dry clutch behaviour. The models are used to investigate the influence of clutch and throttle actuation on the occurrence of unwanted clutch oscillations. The dynamic coefficient of friction between the clutch interacting surfaces was measured using a pin-on-disc rig under different slip speeds and contact pressure conditions, which are representative of a typical clutch engagement manoeuvre. The paper highlights the occurrence of instability issues in clutch dynamics (disc radial mode) as potential generators of aggressive noise, vibration and harshness, particularly during two different clutch pedal actuations. Such analysis has not hitherto been reported in the open literature.

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Section: Transient Torsional Clutch Model Resultsmentioning

confidence: 99%

Noise, vibration and harshness during dry clutch engagement oscillations

Minas

Morris

Theodossiades

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The torque transmitted by the clutch depends on the oil pressure in the clutch chamber which is controlled by the hydraulic actuator system. 26 The clutch torque can be obtained according to the pressure-torque curve, which represents the relationship between the oil pressure in the clutch chamber and the transmitted torque. The clutch torque is transmitted to the output shaft by the gear pairs in the gearbox with increased torque and decreased speed.…”

Section: Dynamic Model Of a Dct Powertrainmentioning

confidence: 99%

Unknown input observer-based fault diagnosis of speed sensors in dual clutch transmission

Qin

Liu

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Speed sensors in the dual clutch transmission (DCT) play an essential role in designing the vehicle launching and gear shifting strategy. The speed information can also be used to monitor whether the DCT system operates normally. The vehicle performance will degrade rapidly once the speed sensor occurs fault, which may lead to poor driving experience. With increasing working hours and poor working environment, the speed sensors are prone to failure. In order to monitor the sensor failure, this article proposes a robust speed sensor fault diagnosis algorithm based on an unknown input observer (UIO). First, the dynamic model of a DCT powertrain is constructed which captures the internal and external disturbance in the system. Based on the dynamic model, a sensor fault detection algorithm is presented by designing an UIO. Second, a set of UIOs is developed to identify which sensor occurs fault. Finally, a sensor fault estimation method using the UIO is proposed. Simulation results reveal that the speed sensor faults can be detected, isolated and estimated, which may further be used for fault-tolerant control of a DCT system.

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“…To compare the actuator moving velocity under a certain duty cycle with that under 100% duty cycle, normalized velocity is defined as an evaluation basis as expressed in Equation (11).…”

Section: Main Evaluation Parameters Of the Motion Characteristicsmentioning

confidence: 99%

“…In low torque conditions, the transmission efficiency is less than 60% caused by the wet clutch and torque converter in the AT and the DCT [6,7]. Therefore, it is very difficult for the AT, CVT, and DCT to provide large torque and high transmission efficiency to meet the demands of heavy-duty vehicles [8][9][10][11]. Currently, the input torque of the AMT can reach to 3400 N•m supplied by ZF Group, which can meet the requirements of large transmitted torque for heavy-duty vehicles.…”

Section: Introductionmentioning

confidence: 99%

Motion Characteristics of a Clutch Actuator for Heavy-Duty Vehicles with Automated Mechanical Transmission

Wang

2021

Actuators

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Clutch control has a great effect on the starting quality and shifting quality of heavy-duty vehicles with automated mechanical transmission (AMT). The motion characteristics of a clutch actuator for heavy-duty vehicles with AMT are studied in this paper to investigate the clutch control strategy further. The modeling principle of the automatic clutch system is analyzed, and a simulation analysis is given to prove its validity and rationality. Normalized velocity and velocity modulation percentage are proposed as evaluation parameters for the clutch actuator driven by pulse width modulation (PWM) signals. Based on an AMT test bench, the actuator motion characteristics are analyzed. Experimental results show that the range of normalized velocity and velocity modulation percentage are obtained for the clutch engagement and disengagement processes. By analyzing the experimental data, the engaging velocity and disengaging velocity of the actuator are estimated using the solenoid valves in combination. The research results provide a fundamental basis for precise controlling of the clutch and improving the smoothness of heave-duty vehicles.

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Simulation model of an electrohydraulic-actuated double-clutch transmission vehicle: modelling and system design

Cited by 10 publications

References 18 publications

Noise, vibration and harshness during dry clutch engagement oscillations

Noise, vibration and harshness during dry clutch engagement oscillations

Unknown input observer-based fault diagnosis of speed sensors in dual clutch transmission

Motion Characteristics of a Clutch Actuator for Heavy-Duty Vehicles with Automated Mechanical Transmission

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