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Design of an innovative car braking system using eddy currentsCruz, David Jose Torres. 10 April 2008 (has links)
No description available.
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Design of a magnetorheological brake systemFalcão da Luz, Luís. 10 April 2008 (has links)
No description available.
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Performance of passenger vehicle anti-lock braking system : an experimental studyCuderman, Jerry Ferdinand, 1966- 07 March 2011 (has links)
Not available / text
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Active control of automotive disc bake rotor squeal using ditherGraf, Aaron John 05 1900 (has links)
No description available.
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Experimental investigation of dither control for the suppression of automotive brake squealDzirasa, Mawuli 05 1900 (has links)
No description available.
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An Experimental Investigation of Proportional BrakingLimpert, Rudolf 01 August 1968 (has links)
In recent years automobile safety has become more and more important.The braking device contributes largely to the problem of safe driving.
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Low friction hybrid nanocomposite material for brake pad applicationGbadeyan, Oluwatoyin Joseph January 2017 (has links)
Submitted in fulfillment of the requirements for the degree of Master in Engineering: Mechanical Engineering, Durban University of Technology, Durban, South Africa, 2017. / Despite the huge improvements made in the development of vehicle brake pad materials, problems such long stopping distances, noise pollution, and heat dissipation still continue to persist. In this regard, a novel polymer-based hybrid nanocomposite brake pad (HC) has been developed. Here, a combination of carbon-based materials, including those at a nanoscale, was used to produce the brake pad. The coefficient of friction, wear rate, noise level, and interfacial temperature was investigated and compared with that of a commercial brake pad material (CR). It was found that the brake pad performance varied with the formulation of each pad. Hybrid nanocomposite brake pads material exhibited superior performance in most tests when compared to the commercial brake pad. They exhibited a 65% lower wear rate, 55% lower noise level, 90% shorter stopping distance, and 71 % lower interfacial temperature than the commercial brake pad (CR).
Furthermore, mechanical properties such as hardness, compressive strength, shear strength, and impact resistance were also evaluated. The material exhibited a 376% higher shear strength, 100% improved compressive strength, 77% greater modulus and 100% higher impact strength than the commercial brake pad. The hardness of both brake pads material was statistically comparable. Additionally, the thermal stability, degradation, water and oil absorption behaviour were measured. It was found that HC brake pad material exhibited a 100% lower water absorption and 80% oil absorption rate. The brake pads also exhibited a thermal stability within the brake pad standard maximum working temperature of 300 -400 0C.
The superior performance of hybrid nanocomposite brake pad material observed was due to synergism between the carbon-carbon additives and uniform dispersion of carbon fiber as shown in Figure 4.16. Scanning electron microscopy study was subsequently performed on fracture and worn surfaces of the brake pads. The micrographs show changes in the structural formation after the incorporation of carbon based fillers. It also shows the smooth structure and uniform dispersion of the carbon fiber. The smooth surface of the worn brake pad is an indicative of a harder structure. No ploughing or score marks were evident. Hence, it was deduced that the reinforced had superior mechanical and tribological properties. These improved properties are suggestive of materials that may be successfully used for brake pad application. / M
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Thermal performance analysis and geometrical optimization of automotive brake rotors.Chi, Zhongzhe 01 July 2008 (has links)
The heat dissipation and thermal performance of ventilated brake discs strongly
depends on the aerodynamic characteristics of the air flow through the rotor
passages. In this thesis, the thermal convection is analyzed using an analytical
method, and the velocity distribution, temperature contours and Nusselt number are
determined. Then numerical models for different rotors, pillar post rotors and vane
rotors are generated and numerical simulations are conducted to determine the
desired parameters. To analyze more realistic vane and pillar post rotor models,
commercial CFD software packages, Fluent and Gambit, are used to simulate the
heat flux rate, air flow rate, velocity distributions, temperature contours, and
pressure distributions inside the rotors. Furthermore, sensitivity studies have been
performed, to determine the effects of a different number of vanes or pillar posts,
inner and outer radii and various angles of vanes. To automate the tedious and
repetitive design process of the disc rotor, a design synthesis framework, iSIGHT,
is used to integrate the geometrical modeling using GAMBIT and numerical
simulations based on FLUENT. Through this integrated design synthesis process,
the disc rotor geometrical optimization is performed using design of experiment
studies. / UOIT
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An educational film : brake repair / An educational and training film on the subject of brake repair / Title on approval sheet : An educational and training film on the subject of brake repair to be used as a supplement to the lectures and demonstrations in vocational and mechanics classesWolfe, Leland S. 03 June 2011 (has links)
The creative project is an educational film that will be used in vocational auto mechanics classes as an aid to the lecture and demonstration of brake repair.Eight millimeter Kodak color film was used and is supplemented with magnetic taped sound.The film deals with the steps and procedures that are necessary to complete a brake repair job. Each step explains the procedures and outlines the technical knowledge needed to complete the brake repair job.
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Suppression of Friction-Induced Oscillations through Use of High-Frequency Dither SignalsMichaux, Michael Andre 24 June 2005 (has links)
Friction-induced oscillations occur in many engineering systems, often resulting
in noise, vibration, and excessive or uneven wear. This research addresses the
suppression of such oscillations, especially with application to braking systems, through
the use of high-frequency dither signals. Brake squeal is an annoying and elusive problem
too often present in braking systems of automobiles, trucks and aircraft.
In previous work, the effectiveness of high-frequency dither to eliminate squeal in
an automotive disc brake assembly was demonstrated experimentally. The main features
of the dither-squeal cancellation system was the application of a high frequency variation
in the brake pressure force accomplished by means of a piezoelectric stack placed behind
one of the brake pads.
This thesis contains a theoretical and numerical treatment of the application of
dither to frictional systems. Two types of systems are investigated. The first is a classic,
mass-on-a-moving belt problem, which experiences friction-induced oscillations similar
to those encountered in brake applications. The system is first studied using an analytical
technique based on the method of averaging. It is shown that, depending on the system,
friction, dither-waveform, and belt-speed parameters, dither can stabilize an unstable
system. However, in some cases, dither can destabilize an initially stable system. These
results are verified numerically using time integration. The second type of system
analyzed in this thesis is an annular plate with a rotating frictional device. The method of
multiple scales is used to predict subcritical regions of instability; the results are validated
using Floquet theory. The thesis treats both tangential and normal dither, the latter being closer to the brake application. It is found that normal dither, in addition to being harder
to analyze, is much less effective than tangential dither.
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