Effect of Phenolic Brake Piston Tribology on Brake Pedal Feel

Koizumi, Naoyoshi

doi:10.4271/2013-01-2051

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…For the second category, reference 14 has determined the technical parameters to characterize pedal feel, studied the influence of relevant parameters on brake pedal feel, and determined the technical parameters that have the greatest impact on brake feel through sensory analysis. Literature 15 analyzed the influence of the surface condition of the brake piston on brake feeling and proposed a method to improve pedal feel by using a phenolic resin brake piston. Document 16 studied the effect of vacuum booster design parameters on brake pedal feel.…”

Section: Introductionmentioning

confidence: 99%

Research on a novel electro-hydraulic brake system and pedal feel control strategy

Xuan-yao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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The existing electro-hydraulic brake system does not consider the adverse effect of the failure of the brake pedal feel simulator on the function of the braking system and the driving safety of the vehicle. To solve the above problems, a novel electro-hydraulic brake system is proposed. Firstly, the structural scheme and the working modes of the system are analyzed, and the electro-hydraulic brake system model is established, and a control strategy for the controlling of the wheel cylinder pressure is put forward. Then, the pedal feel control strategy is studied, which can simulate arbitrary pedal characteristics by controlling the output torque of the motor. Moreover, for the failure of the pedal travel sensor, a pedal displacement estimation method is proposed based on the pressure sensor information of the front chamber of the master cylinder. And for the failure of the pedal feel simulation motor, the pressure of the front chamber of the master cylinder is controlled by adjusting the opening of the pedal feel simulation valve to realize the simulation of the pedal feel. The simulation results based on CarSim/AMESim/Simulink show that the proposed electro-hydraulic brake system has fast pressure response speed and quick pressure tracking accuracy. The pedal characteristics are essentially unchanged before and after the failure of the pedal feel simulation motor or the pedal travel sensor.

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Section: Introductionmentioning

confidence: 99%

Research on a novel electro-hydraulic brake system and pedal feel control strategy

Xuan-yao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…Koizumi [2] studied on the tribology of phenolic brake piston and its correlation to brake pedal feel. Several surface designs of phenolic brake pistons were created and evaluated using modified JASO C448 bench test station.…”

Section: Introductionmentioning

confidence: 99%

The simulation of transient braking force effects for disc brake caliper bench test machine

Ho¹,

Chang²,

Wang³

2016

Proceedings of the 2016 4th International Conference on Sensors, Mechatronics and Automation (ICSMA 2016)

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Abstract. This study analyses a disk braking caliper bench testing machine under braking conditions, to testify its structure characteristics. The analyzed objects include rotating axes and six counterweights. The first step is to use the design software SolidWorks to build axis and counterweights models. Next, the models are transferred to the finite element analysis software ABAQUS to add boundary conditions and to conduct dynamic stress analysis. The ABAQUS simulated test machine instantly applied braking stress under rotating speed 1,300 and 2,000 RPM conditions. The results showed the maximum stress located at axis and counterweight 1 was about 200 MPa under 1,300 RPM; it had little influence on the axis as compared with yielding stress. Under the rotation speed 2,000 RPM, the maximum stress was about 380MPa. The maximum stress is half of yielding stress. The dynamic stress area was transfer from counterweight 1 to long diameter counterweights. So the results showed this design is safty. These design parameters can use for design check and machine manufacturing.

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“…11 With the understanding that priority is given to the experimental study, adjustment of the brake pedal feel depends heavily on a trial-and-error method. However, the brake pedal feel is the overall response from each of the characteristics in the brake system; many factors have effects on it, such as the brake pedal, 12 the diaphragm return spring, the valve return spring, the reaction disc, 13 the master cylinder seals and piston, the pipeline, the wheel cylinder, 14 the brake friction lining and the gap between the brake disc and the pads. 15 Therefore, as there are few systematic theories, adjusting the brake pedal feel requires much labour, time and cost.…”

Section: Introductionmentioning

confidence: 99%

A dynamic model for brake pedal feel analysis in passenger cars

Meng

Zhang

2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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The brake system of a passenger car is a complex system composed of an assembly of mechanical parts, such as springs and rubber parts, and structures filled with gas and other liquids. In order to predict the brake pedal feel of a passenger car, a dynamic model of a brake system during application of the brake pedal was proposed; this considered and modelled the physical structures and the working processes of the key components. The model takes into account not only the spring preloads and the frictional forces in the booster and the master cylinder but also the reaction disc features and the variation in the bulk modulus of the brake fluid. When the pedal travel is regarded as the input, the boundary conditions for the dynamic equations of the brake system components are strictly defined. Also, bench experiments for the booster and the master cylinders were designed for parameter identification; the effectiveness of the component models was validated under conditions including with and without vacuum assist and with and without brake fluid. On the basis of these experiments, the static and dynamic characteristics of the brake pedal feel were simulated using the static model and the dynamic model of the brake system. Then, vehicle road experiments were carried out. With the assessment index of a three-quadrant diagram covering the pedal travel, the pedal force and the master cylinder pressure, as well as a four-quadrant diagram covering the pedal travel, the pedal force, the master cylinder pressure and the longitudinal deceleration of the vehicle, the results from the simulations and the experiment were compared and analysed. We conclude that this novel model of a brake system can accurately predict the brake pedal feel characteristics of passenger cars and can be used for brake system design and adjustment.

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Effect of Phenolic Brake Piston Tribology on Brake Pedal Feel

Cited by 8 publications

References 3 publications

Research on a novel electro-hydraulic brake system and pedal feel control strategy

Research on a novel electro-hydraulic brake system and pedal feel control strategy

The simulation of transient braking force effects for disc brake caliper bench test machine

A dynamic model for brake pedal feel analysis in passenger cars

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