Thermal Brake Judder Investigations Using a High Speed Dynamometer

Bryant, David; Fieldhouse, John D.; Crampton, Andrew; Talbot, Chris J.; Layfield, Jonathan

doi:10.4271/2008-01-0818

Cited by 14 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In other words it is generated due to temporary geometrical deviations of a disc as temperature goes higher and will disappear with disappearance of geometrical deviations as the disc cools down. It is caused due to high thermal input to the brake in a short period of time that results in a thermoelastic deformation, and eventually thermoelastic instabilities in the form of hot spots [108].…”

Section: Hot Juddermentioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

View full text Add to dashboard Cite

Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in a greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been an intensive fundamental research going on about the evolution of tribological interface of disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

show abstract

Section: Hot Juddermentioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

View full text Add to dashboard Cite

show abstract

“…For example, a fully coupled transient thermo-mechanical finite element model of a brake disk and pad assembly involving complex eigenvalue analysis was developed by Hassan et al 14 to evaluate brake squeal. They concluded that the squeal frequency and intensity are dependent on the interface contact conditions, which can be validated by an in-house brake dynamometer designed by Bryant et al 15 The friction torque variation can be employed to reflect hot judder through Park et al 16 and Jung et al, 17 who established three-dimensional finite element models in SAMCEF to investigate the hot judder phenomenon.…”

Section: Introductionmentioning

confidence: 95%

Hot judder behavior in multidisc clutches

Yang

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

This paper presents an investigation of the hot judder phenomenon of multidisc clutches, which takes place during the engagement process. Depending on the results of finite element analysis, a pressure distribution function is defined and a contact pressure equation is established to demonstrate the non-uniformity of the contact pressure distribution on the friction interfaces due to frictional heat. The relationship between the coefficient of friction and the temperature is analyzed. A 4 degrees of freedom power-train model is developed to evaluate the clutch judder behavior. The paper indicates that the clutch judder is influenced by the non-uniformity of the interface contact pressure distribution, which is excited by frictionally induced thermal load. The non-uniform contact pressure distributions along the radial direction have a slight influence on the clutch judder, while the uneven contact pressure distributions along the circumference contribute to the judder substantially. Furthermore, the results in this work can be used to study the operation instability and the thermal failure of clutches.

show abstract

“…Boulahbal [14] presented a unified framework for addressing NVH-related issues attributed to tyre uniformity and brake rotor DTV. Some researchers also investigated the thermal brake judder, analysed the mechanism of hot brake judder, and presented various measures to reduce thermal brake judder [15,16].…”

Section: Introductionmentioning

confidence: 99%

Brake judder analysis using a car rigid–flexible coupling model

Chen

Wang

Zan

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In order to understand the brake judder of a passenger car, the brake judder test of a passenger car was performed with initial speeds of 90, 120, and 150 km/h, end speed of 20 km/h, and pedal forces of 25, 30, 35, and 40 N on a roller dynamometer in a semi-anechoic chamber. The pressure fluctuation of the brake fluid pipe was presented. The accelerations of the steering wheel were recorded at vertical, lateral, and radial directions respectively, and the frequency analysis of the brake judder was also performed. The frequency response functions of the steering system were measured in order to understand the cause of the brake judder. Meanwhile, the multibody system dynamics model of the test vehicle was created with a flexible body and steering system. The brake torque calculated with the brake fluid pressure of the brake pipe in the brake judder test was exerted on the brake systems. The simulated accelerations of the steering wheel were calculated at three different directions, and the frequency analysis of the brake judder was also presented. The design of experiment was presented in order to reduce the brake judder and improve the comfort of the vehicle. An orthogonal array table was designed with 13 factors and 3 levels. The optimum combination was confirmed. The brake judder was also simulated, and the accelerations of the steering wheel were also calculated. Furthermore, the optimization results were verified by the brake judder test. The verification of the optimization indicates that the optimization results are correct and effective.

show abstract

Thermal Brake Judder Investigations Using a High Speed Dynamometer

Cited by 14 publications

References 0 publications

Overview of disc brakes and related phenomena - a review

Overview of disc brakes and related phenomena - a review

Hot judder behavior in multidisc clutches

Brake judder analysis using a car rigid–flexible coupling model

Contact Info

Product

Resources

About