A Study on Reducing Gear Rattle Noise Based on Sensitivity Analysis of Drivetrain Torsional Model Changan Automobile Company, Limited

Format:

Conference/Event

Author/Creator:

Yang, Yang, author.

Contributor:

Pang, Jian

Tang, Yu

Tian, Xiong

Wang, Lanjun

Conference Name:

Noise and Vibration Conference and Exhibition (2017-06-12 : Grand Rapids, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2017

Summary:

AbstractWith drastically reduction of engine noise, the gear rattle noise generated by the impact between neutral gears inside transmission can be much easily perceived. It is well known that the torsional mode has a direct relationship with the transmission gear rattle noise. This paper establishes a torsional model of a front wheel drive automotive drivetrain, including clutch system, transmission box and equivalent load of a full vehicle, in AMESim software. The experimental engine speed fluctuations at different gears are used to excite the torsional model. The influences of several parameters, including flywheel inertia, clutch stiffness, clutch hysteresis and drive shaft stiffness, on the 2nd order (major engine firing order for a 4-cylinder-4-stroke engine) torsional resonant frequency and the 2nd order torsional resonant peak of the transmission input shaft are analyzed by changing them alternatively. The model is validated by a comparison between the simulated and measured 2nd torsional resonant peaks. It is concluded that the optimized drivetrain parameters reduce the 2nd order torsional resonant peak of the transmission input shaft effectively. Some control strategies are successfully applied to a prototype vehicle to reduce the gear rattle noise which meets the subjective evaluation criterion

Notes:

Vendor supplied data

Publisher Number:

2017-01-1779

Access Restriction:

Restricted for use by site license