Real-Time Transfer Case 4WD Control Development to Improve Vehicle Coasting Stability China FAW Group Corporation

Format:

Book

Conference/Event

Author/Creator:

Liu, Yuanzhi, author.

Contributor:

Cui, Jinlong

Hong, Jiang

Hui, Zhouze

Li, Jing

Liu, Xing

Xu, Zhan

Yuanjun, Lu

Zhang, Qiang

Zhao, Yang

Conference Name:

WCX SAE World Congress Experience (2023-04-18 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2023

Summary:

The real-time transfer case installed on the four-wheel drive vehicle with a longitudinally mounted engine, can distribute not only the engine drive torque, but also the engine drag torque between the front and rear axles, to improve vehicle traction and stability performance. When under vehicle coasting condition, the engine drag torque may cause vehicle rear wheel slippage on low friction adhesion road, which causes a vehicle to be unstable and spin in. Although the current engine Drag Torque Control technology has the ability to reduce rear wheel longitudinal slippage by engine torque control, but the control effect is poor, the wheel slip ratio is large and the slipping duration is long, the vehicle still has the tendency to spin inches This paper proposed a new transfer case coasting control strategy to avoid this problem. Through the pre-load control based on vehicle coasting characteristics and closed-loop feedback control based on rear axle slip state, the rapid dynamic distribution of engine drag torque between the front and rear axle is realized to avoid single axle slippage and improve vehicle coasting stability. Through test vehicle verification, the proposed control strategy could significantly improve vehicle coasting deceleration and stability performance

Notes:

Vendor supplied data

Publisher Number:

2023-01-0909

Access Restriction:

Restricted for use by site license