In-Gear Slip Control Strategy of Dry-Clutch Systems Using a Sliding Mode Control

The centrifugal pendulum vibration absorber (CPVA) is a rotating mechanical device that counteracts order-specific torque fluctuations in a rotating system by the reciprocating motion of multiple mass absorbers on a predetermined path. The downsizing of automotive engines and supercharging technologies have promoted the research and application of CPVA in drivelines. The development of CPVA is reviewed, a variety of typical CPVA structural features are described such as unifilar type, parallel bifilar type, trapezoidal bifilar type, roller type and synchronous type. The non-linear characteristics of the CPVA such as jumps and asynchronous response are discussed in detail. Mathematical methods for establishing and solving the equations of motion, the excitation of the CPVA by the gravity field, modal property analysis, the effect of the type of damping between the damper and the rotor, and the effect of manufacturing deviations on system performance are discussed. The main research results of CPVA are summarized, current research hotspots and difficulties are summarized, future development directions are proposed, and suggestions are made for future research on powertrain electrification.

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Decoupling Effects in Wet-Running Multi Plate Clutches – Extended and Efficient Use in Hybrid Drive Trains

Bischofberger,

Bause,

Ott

et al. 2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">The functional extension of vibration reduction in continuous slip operation in modern wet-running clutch systems under dynamic excitation is being investigated by the authors. Therefore, a mixed virtual-physical validation environment has been developed using the IPEK X-in-the-Loop Framework and will be presented as part of this contribution. Thus, the validation environment enables the consideration of interactions with the residual systems, especially the residual drive train.</div><div class="htmlview paragraph">In this contribution, the validation environment is used to investigate whether and how an attribute variation in the subsystem, respectively the tribological system, can provide improved vibration reduction without increased power dissipation due to damping but other reducing mechanisms favored. The results show significant differences in vibration reduction behavior whereas the power losses are almost the same between the investigated tribological system. A main conclusion derived is: with an aimed design of the tribological system it is possible to favor other reducing effects beside damping and therefore favor a more efficient vibration reduction for the same dynamic slip operation.</div><div class="htmlview paragraph">The knowledge gained allows the clutch system to be designed specifically for functional extension, thus improving the trade-off between comfort and efficiency. Finally using the clutch system in hybrid electric vehicles as a mechatronic dynamic actuator enables weight- and space-optimized drive train development, which can eventually also improve efficiency, range and comfort behavior in electrified vehicles with gearboxes and provide a basis for the development of corresponding control strategies.</div></div>

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In-Gear Slip Control Strategy of Dry-Clutch Systems Using a Sliding Mode Control

Cited by 3 publications

References 3 publications

Real-Time Torque Estimation of Automotive Powertrain With Dual-Clutch Transmissions

Real-Time Torque Estimation of Automotive Powertrain With Dual-Clutch Transmissions

A review of research on centrifugal pendulum vibration absorber in the field of vehicle power transmission

Decoupling Effects in Wet-Running Multi Plate Clutches – Extended and Efficient Use in Hybrid Drive Trains

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