吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (5): 1388-1394.doi: 10.13229/j.cnki.jdxbgxb201505002

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Master cylinder dynamic model for brake pedal feeling and its key factors

MENG De-jian1, 2, 3, ZHANG Li-jun1, 2, FANG Ming-xia4, YU Zhuo-ping1, 2   

  1. 1.School of Automotive Engineering,Tongji University,Shanghai 201804,China;
    2.Collaborative Innovation Center for Intelligent New Energy Vehicle,Tongji University,Shanghai 201804,China;
    3.Mechanics Post-doctoral Research Station,Tongji University,Shanghai 200092,China;
    4.School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China
  • Received:2013-12-15 Online:2015-09-01 Published:2015-09-01

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Abstract: A brake master cylinder dynamic model for brake pedal feeling is proposed, in which the return spring preload, system friction forces, valve port clearance and changes in the brake fluid bulk modulus are considered. Experiments on the characteristics of the brake master cylinder are carried out under the condition of different pushrod speed, and then the key parameters of model are identified. By analysis and comparison, it is found that the test results and the simulation results have a good consistency. Further, the key factors of the brake master cylinder for brake pedal feel are analyzed, and results show that the piston diameter, spring preload and stiffness, and the brake fluid gas content significantly influence the brake pedal feel and master cylinder performance.

Key words: vehicle engineering, brake master cylinder, hydraulic brake system, brake pedal feel, bulk modulus

CLC Number: 

  • U463.5
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