Design and Modeling of Energy Efficient Dual Clutch Transmission With Ball-Ramp Self-Energizing Mechanism

Dual clutch transmission (DCT) which can simultaneously improve acceleration performance and fuel efficiency compared to automatic transmissions (AT) and manual transmissions (MT) is one of the most noted studies in recent powertrain applications. However, much of energy consumption of clutch actuator reduces fuel efficiency of DCT-equipped vehicles. In order to reduce energy consumption of these actuators, a method of modifying mechanism and a method of improving it through control have been studied. However, the results of each study still use more energy or make the actuator less controllable. Thus, in this manuscript, the authors propose a ball-ramp DCT (BR-DCT) with a clutch actuator that changes mechanism to reduce power consumed by engagement and improve controllability. DCT is designed using the proposed structure and design parameter constraint selection method, and energy efficiency improvement effect of BR-DCT is verified through simulation. The authors also demonstrate effect of BR-DCT prototype on actuator energy saving through test bench experiment. As a result, clutch actuator of BR-DCT uses 84% less energy than conventional DCT and can improve vehicle fuel efficiency by 0.5%. In addition, since it has same characteristics as conventional DCT, it verifies that it can fully utilize controller developed previously.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01736553
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 22 2020 12:24PM