制动工况下圆盘/摩擦衬块接触面间动态压力中心的测量(二)  

Measurement of The Dynamic Centre of Pressure of The Disk/Pad Interface During A Braking Operation(Ⅱ)

作　　者：John D.Fieldhouse Naveed Ashraf Chris Talbot 

机构地区：[1]the Automotive Engineering Research Group University of Huddersfield

出　　处：《传动技术》2012年第3期34-42,共9页Drive System Technique

摘　　要：本文阐明了活塞尾端或内侧,摩擦衬块在制动产生听觉可分辨的噪声方面的影响。采用独特的技术测量常态制动工况下摩擦衬块/圆盘接触面间的动态中心压力(Cop)。该新技术采用一个在摩擦衬块内嵌入压力感敏膜。本文还提出了摩擦衬块/卡钳接触区的共面分析,以及它对圆盘/摩擦衬块Cop位置的影响。该分析表明,活塞尾端情况,影响Cop位置,并进一步说明该中心的移动类似于摩擦衬块支架振动与支架反向。本文包含用12个活塞对立卡钳的附加研究,初始Cop位置可以沿摩擦衬块和径向两个方向变化。结果表明,Cop的运动很明确使制动压力增大。This paper demonstrates the influence of the trailing end of the piston, or inboard, pad on the propensity of a brake to generate audible squeal. The unique technique was employed to measure the dy- namic CoP at the pad/disk interface during a normal braking operation. This novel technique uses an em- bedded pressure sensitive film within the pad. The paper also presents the co-planar analysis of the pad/cal- iper contact regions and its influence on the position of the disk/pad CoP. The analysis shows how the trai- ling end of the piston pad influences the position of the CoP and goes on to explain why the centre moves as the pad abutment vibrates against the abutment. The paper includes additional work with a 12-piston op- posed caliper where the initial CoP may be varied both along the pad and radially. Results show a very defi- nite movement of the CoP as the brake pressure is increased.

关 键 词：制动噪声 圆盘制动 制动摩擦衬块 中心压力 压力中心 

分 类 号：U463.51[机械工程—车辆工程]