Research on Dynamic Performance of Drum Brake

Wang, Xuanfeng; Liang, Yingchun; Huang, Chaosheng; Ying, Guozeng

doi:10.4271/2007-01-3673

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…In fact, the mechanical loss of the drum brake is not negligible, and the calculation accuracy of the calculated braking force with respect to the measured braking force by equation ( 12) is just about 70 per cent. Wang et al [14] proposed an appropriate method to describe dynamic models in detail and improved the formula. In reference [14], the brake chamber, the brake camshaft, and the brake shoe are taken into account with consideration of various resistances from friction, inertia, and the return spring.…”

Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

“…Wang et al [14] proposed an appropriate method to describe dynamic models in detail and improved the formula. In reference [14], the brake chamber, the brake camshaft, and the brake shoe are taken into account with consideration of various resistances from friction, inertia, and the return spring. The input of these models is the air pressure in the chamber and the final outputs are the total actual dynamic brake torque and the braking force of the wheels.…”

Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

“…Based on the improvements, the calculation accuracy of the calculated braking force with respect to the measured braking force approaches 90 per cent. According to reference [14], the structural parameters of the midlift axle are optimized as follows: effective area of brake chamber 16, 95 cm 2 ; slack adjuster length, 117 mm; arc angle of the lining, 60 º; diameter of the brake drum, 400 mm. When the line pressure is 0.7 MPa, the actual braking force of the midlift axle is 28 kN and is basically close to the ideal braking force.…”

Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

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A study on the asynchronous brake lock-up of a statically indeterminate tractor with an air suspension

Wang

Liang

Shi

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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The paper aims to resolve the practical problems of asynchronous brake lock-up which acts on the wheels of statically indeterminate tractors with an air suspension. First, two kinds of deflection model are calculated, both of which are under the combined effect of the brake force and the vertical force. One model considers the leaf spring suspension that is mounted on the front axle, and the other considers the air suspensions that are mounted on both the midlift axle and the drive axle. Second, a 12-degree-of-freedom braking force distribution model of the statically indeterminate multi-axle tractor-semitrailer is constructed on the basis of the foregoing preparation. Third, the ideal braking forces of each axle in the model are simultaneously calculated and the actual braking forces of each axle are measured by road tests. The curves of the ideal and the actual braking force distribution ratios at different brake rates are described. The contradistinctive outcome indicates that the excessive braking force of the midlift axle results in a premature brake lock-up, which is the main reason why wheels lock asynchronously. Finally, because of the analysis of the distribution ratios of the ideal and the actual braking forces, the paper outlines how to redesign the braking force distribution of the tractor-semitrailer according to ECE R13, SAE J992b, and JASO C514. The paper also proposes a definition of and calculational method for the fitting degree (FD), and the FD of the midlift axle is improved from 61.2 per cent to 91.8 per cent. Compared with the original tractor-semitrailer, not only is the actual braking force distribution more reasonable but also the brake stability is improved.

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Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

Section: The Brake Line Pressure Of the Tractorsemitrailermentioning

confidence: 99%

See 1 more Smart Citation

A study on the asynchronous brake lock-up of a statically indeterminate tractor with an air suspension

Wang

Liang

Shi

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…The increased push rod stroke involves the combined effects of brake shoe/drum wear and thermal expansion of the drum. Wang et al (2007) performed an analysis of the S-cam drum brake, assuming the brake drum and the brake shoe to be rigid, and the relationship between the brake chamber pressure and the push rod stroke was determined experimentally. However, the existing literature does not provide any direct correlation between the pressure in the brake chamber and the push rod stroke.…”

Section: Introductionmentioning

confidence: 99%

Model-based analysis of the mechanical subsystem of an air brake system

Sonawane

Narayan

Rao

et al. 2011

Int.J Automot. Technol.

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Most commercial vehicles such as buses and trucks use an air brake system, often equipped with an S-cam drum brake, to reduce their speed and/or to stop. With a drum brake system, the clearance between the brake shoe/pad and the brake drum may increase because of various reasons such as wearing of the brake shoe and/or brake drum and drum expansion caused by high heat generation during the braking process. Hence, to ensure proper functioning of the brake system, it is essential that the clearance between the brake shoe and the brake drum is monitored. In this paper, we present a mathematical model for the mechanical subsystem of the air brake system that can be used to monitor this clearance. This mathematical model correlates the push rod stroke transients and the brake chamber pressure transients. A kinematic analysis and a dynamic analysis of the mechanical subsystem of the air brake system were performed, and the results are corroborated with experimental data.

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Finite Element Analysis of Brake Shoe Based on ANSYS Workbench

Zheng¹,

Zhang²,

Liu³

2018

Proceedings of the 2018 2nd International Conference on Artificial Intelligence: Technologies and Applications (ICAITA 2018)

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Abstract-This paper takes brake shoe of drum brake as the object of study. The three dimensional model of brake shoe is established by using CATIA software. It is calculated that the driving force of the cam to brake shoe and the spring of brake shoe back position. Based on this, the static analysis of brake shoe structure is carried out by using ANSYS Workbench software, the stress and deformation of brake shoe are obtained under the static load condition. The structure of brake shoe is optimized and the maximum stress of the optimized brake shoe is reduced by 30.88%, which provides a theoretical basis for the structural design and optimization of brake shoes.

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Research on Dynamic Performance of Drum Brake

Cited by 3 publications

References 4 publications

A study on the asynchronous brake lock-up of a statically indeterminate tractor with an air suspension

A study on the asynchronous brake lock-up of a statically indeterminate tractor with an air suspension

Model-based analysis of the mechanical subsystem of an air brake system

Finite Element Analysis of Brake Shoe Based on ANSYS Workbench

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