New Fiesta: Brake Pedal Feeling Development to Improve Customer Satisfaction

Pereira, Joaquim Costa

doi:10.4271/2003-01-3598

Cited by 9 publications

(4 citation statements)

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“…Ford vehicle company.The Ford company [3] of subjective evaluation about the braking system focuses on the pedal system evaluation (from the brake pedal to wheel cylinder), less about vehicle performance evaluation. The main wants were good modulation, low pedal efforts, short pedal travels, high deceleration capability and high fading resistance, as shown Table 2.…”

Section: Braking Noise Self-excited Vibrationmentioning

confidence: 99%

Subjective Evaluation of Braking System and Dynamics Analysis

Guan

Duan

2014

AMM

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Subjective evaluation of the braking based on the people's feelings. When braking, the response of vehicle and the convenience of brake determines the driving safety and comfort. Research major vehicle company's subjective evaluation of braking system, and summarize large numbers of projects into tactile indicators, somatosensory indicators, and braking performance three evaluation projects in accordance with the people's subjective feelings. Through sorting, the loads of evaluation can be reduced when evaluation for subjective driver. To analysis of typical index by dynamics methods to find the reasons of negative phenomena, so provides the design basis of the brake system for meet the subjective feelings.

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Section: Braking Noise Self-excited Vibrationmentioning

confidence: 99%

Subjective Evaluation of Braking System and Dynamics Analysis

Guan

Duan

2014

AMM

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“…The evaluation index includes the static lever force-lever travel curve 10–13 and deceleration–lever force curve. 14,15 For scooters, the static lever force-lever travel curve is generally applied. The braking performance, ride comfort, and handbrake lever feel are the overall responses from each brake system’s characteristics and related to the CBS’s BFD ratio.…”

Section: Introductionmentioning

confidence: 99%

Design of combined brake system for light weight scooters

Lin

Tseng

Kuang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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The combined brake system (CBS) is a mechanism that links the front and rear brakes for scooters. For two-wheeled scooters, a CBS with appropriate braking force distribution can reduce the risk of crashing accidents due to insufficient driving proficiency. The design of the braking force distribution for a CBS is challenging to the designer because it has to fulfill many requirements such as braking performance, ride comfort, reliability, and low costs. This paper proposes a systematic method to optimize the parameters of CBS. The evaluation indexes for the design are first discussed. The steps to determine the critical parameter to meet the indexes and a method to predict braking performance are developed. Finally, driving tests are carried out to verify the effectiveness of the proposed method. Experimental results showed that the deceleration of the tested scooter equipped with the designed CBS achieves an average mean fully developed deceleration (MFDD) of 5.246 m/s2, higher than the homologation requirement. Furthermore, the proposed method’s prediction of braking performance is in good agreement with the test results, with errors <1%.

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“…The assessment index of the brake pedal feel consists of the brake feel index, 1-3 the pedal force-pedal travel curve, 4-8 the deceleration-pedal force curve, 5, 8-10 the decelerationpedal travel curve 4,5,[7][8][9][10] and the brake distance-pedal travel curve. 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.…”

Section: Introductionmentioning

confidence: 99%

“…Research on the brake pedal feel includes subjective assessment and objective measurement, usually containing a static characteristics assessment and a dynamic characteristics assessment in each study. The assessment index of the brake pedal feel consists of the brake feel index, [1][2][3] the pedal force-pedal travel curve, [4][5][6][7][8] the deceleration-pedal force curve, 5,[8][9][10] the decelerationpedal travel curve 4,5,[7][8][9][10] and the brake distance-pedal travel curve. 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.…”

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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New Fiesta: Brake Pedal Feeling Development to Improve Customer Satisfaction

Cited by 9 publications

References 0 publications

Subjective Evaluation of Braking System and Dynamics Analysis

Subjective Evaluation of Braking System and Dynamics Analysis

Design of combined brake system for light weight scooters

A dynamic model for brake pedal feel analysis in passenger cars

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