Title: Investigation on oil centrifugal force balance of main and auxiliary cylinders in wet clutch of heavy-duty vehicle

Authors: Ran Gong; Yuhang Liu; Huajun Che

Addresses: Department of Automotive Engineering, Jiangsu University, Zhenjiang, 212013, China ' Department of Automotive Engineering, Jiangsu University, Zhenjiang, 212013, China ' Department of Automotive Engineering, Jiangsu University, Zhenjiang, 212013, China

Abstract: The high-speed rotation of the wet clutch in heavy-duty vehicles causes the oil in the cylinder to generate the large centrifugal force. In response to the above problems, a balanced structure of the cylinders in the wet clutch is proposed to offset the dynamic pressure generated by the centrifugal force. The correctness of the dynamic pressure model of the clutch cylinder is verified by a test of the oil pressure in clutch cylinder. The effects of cylinder rotational speed, oil temperature and oil filling pressure on the total pressure and dynamic pressure in main cylinder and auxiliary cylinder are discussed. Taking the impact degree as an evaluation index, the shift quality of the clutch with different cylinder sizes is studied. The size of the auxiliary cylinder with the best balanced effect on the dynamic pressure in the main cylinder is proposed in this paper.

Keywords: wet clutch; balanced structure; dynamic pressure; moving mesh; shift quality; CFD; computational fluid dynamics.

DOI: 10.1504/IJHVS.2023.132994

International Journal of Heavy Vehicle Systems, 2023 Vol.30 No.3, pp.335 - 364

Received: 06 Jul 2022
Accepted: 11 Jul 2022
Published online: 23 Aug 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article