THE IDEAL BRAKE FORCE DISTRIBUTION BETWEEN THE AXLES-AXLE VEHICLE WHEN THE SERVICE BRAKE APPLICATIONS

2015 ◽  
Vol 2 (2) ◽  
pp. 725-731
Author(s):  
Туренко ◽  
A. Turenko ◽  
Коробко ◽  
A. Korobko ◽  
Подригало ◽  
...  
Keyword(s):  
Front Axle ◽  
Evaluation Criterion ◽  
Force Distribution ◽  
Brake Force ◽  
Braking Force ◽  
Brake Force Distribution ◽  
Utility Vehicle ◽  
The Ideal

The article defines the ideal distribution of brake forces between the axles of two-axle utility vehicle when braking. As an evaluation criterion of the selected indicator was the coefficient of stability. It is established that with increase of deceleration of the vehicle axle when the service brake applications, the braking force at the front axle decreases

Theoretical Research on Ideal Brake Force Distribution of Tractor-Semitrailer Cornering Braking

2013 ◽  
Vol 467 ◽  
pp. 451-455
Author(s):  
Chen Li ◽  
Xing Hu Li ◽  
Wei Zhou ◽  
Wei Liang Dai
Keyword(s):  
Load Transfer ◽  
Lateral Acceleration ◽  
Theoretical Research ◽  
Force Distribution ◽  
Vertical Load ◽  
Traditional Design ◽  
Brake Force ◽  
Braking Control ◽  
Brake Force Distribution ◽  
The Ideal

For tractor-semitrailer, load transfer during cornering braking caused big difference of the vertical load between coaxial wheels. As a result, braking efficiency and directional stability were affected seriously, the traditional design of braking force distribution between axles couldnt meet the requirements. In this paper, a dynamic model of tractor-semitrailer was established according to the motion and force during cornering braking. The rule of vertical load changing of each wheel with longitudinal acceleration and lateral acceleration was obtained. Combining with the tire and road adhesion conditions, the ideal brake force distribution was achieved. The research could provide theoretical reference to better control strategy of tractor-semitrailer braking control system.

A Variable Proportional Valve Braking Force Distribution Strategy Including SOC Constraints of Electric Vehicles

2014 ◽  
Vol 597 ◽  
pp. 525-530
Author(s):  
Hong Xia Yu ◽  
Zhen Yang Lin
Keyword(s):  
Electric Vehicles ◽  
Energy Recovery ◽  
Distribution Area ◽  
Regenerative Braking ◽  
Force Distribution ◽  
Proportional Valve ◽  
Brake Force ◽  
Distribution Line ◽  
Braking Force ◽  
Brake Force Distribution

Braking force distribution plays an important role in energy recovery of electric vehicles. A new braking force distribution based on the variable proportional valve is proposed to solve the traditional proportional valve braking force distribution problem. By considering the safety brake force distribution area, the variable proportional valve friction braking force distribution line is optimized, the regenerative braking force equations are deduced using the optimized friction braking force distribution line at different braking intensity, then the regenerative braking force is corrected by considering mechanical characteristics of motor and SOC of battery constraints. Simulation results show that the proposed regenerative braking energy recovery has been significantly improved.

scholarly journals Conceptual design evaluation of concurrent brake actuator mechanism

2021 ◽  
Vol 1 (1) ◽  
pp. 97-105
Author(s):  
Mahamad Hisyam Mahamad Basri ◽  
Abdul Halim Zulkifli ◽  
Noor Iswadi Ismail ◽  
Talib Ria Jaafar ◽  
Muhammad Arif Ab Hamid Pahmi ◽  
...  
Keyword(s):  
Mechanism Design ◽  
Motion Analysis ◽  
Conceptual Design ◽  
Qualitative Evaluation ◽  
Force Distribution ◽  
Main Body ◽  
Concept Design ◽  
Brake Force ◽  
Brake Force Distribution ◽  
The Ideal

The proper amount of braking force on both wheels is needed to optimize the braking performance and stability of the motorcycle. The braking effectiveness can be maximized by keeping the ideal nonlinear brake force distribution during braking. Thus the purpose of this research is to present a mechanism that can be accommodated as a Concurrent Brake Actuator (CBA) design to control the ideal nonlinear brake force distribution. In this paper, the conceptual design of the CBA mechanism is developed to be used as a based design for CBA development. Thus, two conceptual designs of the CBA mechanism have been generated. The proposed concept designs were evaluated based on Design Failure Mode and Effect Analysis (DFMEA) and SOLIDWORKS Motion Analysis. The potential failure of the CBA concept design was determined based on the risk priority number (RPN) in DFMEA. The information obtained from DFMEA was used in SOLIDWORKS Motion Analysis to identify stress performance analysis for each CBA conceptual design. Then, the best CBA concept design will be selected. The selection was made based on the highest score gained by the CBA concept design in qualitative evaluation. Based on the results, the fixed main body design with a tilted position linear slope in CBA Design I is potentially to actuate and distribute the nonlinear brake force to the front and rear brake with less potential of failure. Therefore, the proposed mechanism design will be used as a based mechanism design for CBA development.

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

2011 ◽  
Vol 226 (4) ◽  
pp. 507-516 ◽  
Author(s):  
Wang Xuanfeng ◽  
Liang Yingchun ◽  
Shi Guang ◽  
Huang Chaosheng ◽  
Ying Guozeng
Keyword(s):  
Front Axle ◽  
Distribution Model ◽  
Leaf Spring ◽  
Force Distribution ◽  
Vertical Force ◽  
Air Suspension ◽  
Calculational Method ◽  
Braking Force ◽  
Definition Of ◽  
The Ideal

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.

Analysis and Research of Automotive Brake Performance Based on MATLAB

2014 ◽  
Vol 556-562 ◽  
pp. 1392-1395
Author(s):  
Chen Zhao
Keyword(s):  
Visual Analysis ◽  
Simulation Software ◽  
Force Distribution ◽  
Distribution Characteristics ◽  
Brake Force ◽  
Brake Performance ◽  
Brake Force Distribution ◽  
Wheel Brake ◽  
Automotive Brake ◽  
The Ideal

Based on the application of the vehicle parameters, the article analyzed the brake process and its performance by MATLAB. The article proposed analytical method and process of automotive brake ideal conditions by simulation software MATLAB. And through drawing the ideal front and rear brake force distribution characteristics, calculated and analyzed the wheel brake force, adhesion coefficient and brake strength. Also the article provided the foundations of convenient calculation method and visual analysis for automotive brake performance.

Research on Electro-Mechanical Braking System Control of EV Based on Maximum Energy Recovery Strategy

2015 ◽  
Vol 740 ◽  
pp. 196-200
Author(s):  
Qing Nian Wang ◽  
Shi Xin Song ◽  
Shao Kun Li ◽  
Wei Chen Zhao ◽  
Feng Xiao
Keyword(s):  
Control Strategy ◽  
Influence Factors ◽  
Maximum Energy ◽  
Regenerative Braking ◽  
Force Distribution ◽  
System Control ◽  
Braking System ◽  
Power Battery ◽  
Braking Force ◽  
The Ideal

With the analysis of influence factors on regenerative braking in electro-mechanical braking system, and considering the power battery charging characteristics, a regenerative braking system control strategy for electric vehicle is researched in this paper. The models of the motor and the whole vehicle are built in AMESim. The control effects and the braking force distribution on front and rear wheels of the control strategy in an FTP-72 driving cycle are simulated and analyzed. The simulation results show that the control strategy could be utilized in the 4WD electric vehicles. The ideal braking force distribution on front and rear wheels and the high amount of recovery energy could be achieved.

Collaborative control of a dual electro-hydraulic regenerative brake system for a rear-wheel-drive electric vehicle

2018 ◽  
Vol 233 (4) ◽  
pp. 1035-1046 ◽  
Author(s):  
Jonathan Nadeau ◽  
Philippe Micheau ◽  
Maxime Boisvert
Keyword(s):  
Electric Vehicle ◽  
Energy Recovery ◽  
Rear Wheel ◽  
Brake System ◽  
Force Distribution ◽  
Hydraulic Brake ◽  
Brake Pressure ◽  
Wheel Drive ◽  
Brake Force ◽  
Brake Force Distribution

Within the field of electric vehicles, the cooperative control of a dual electro-hydraulic regenerative brake system using the foot brake pedal as the sole input of driver brake requests is a challenging control problem, especially when the electro-hydraulic brake system features on/off solenoid valves which are widely used in the automotive industry. This type of hydraulic actuator is hard to use to perform a fine brake pressure regulation. Thus, this paper focuses on the implementation of a novel controller design for a dual electro-hydraulic regenerative brake system featuring on/off solenoid valves which track an “ideal” brake force distribution. As an improvement to a standard brake force distribution, it can provide the reach of the maximum braking adherence and can improve the energy recovery of a rear-wheel-drive electric vehicle. This improvement in energy recovery is possible with the complete substitution of the rear hydraulic brake force with a regenerative brake force until the reach of the electric powertrain constraints. It is done by performing a proper brake pressure fine regulation through the proposed variable structure control of the on/off solenoid valves provided by the hydraulic platform of the vehicle stability system. Through road tests, the tracking feasibility of the proposed brake force distribution with the mechatronic system developed is validated.

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