Analysis of Concurrent Brake Application for Underbone Motorcycle

2014 ◽  
Vol 980 ◽  
pp. 107-111
Author(s):  
M. Hisyam Basri ◽  
A.H. Zulkifli ◽  
N.I. Ismail ◽  
Sharzali Che Mat ◽  
M.M. Mahadzir
Keyword(s):  
Front Wheel ◽  
Motion Equation ◽  
Force Component ◽  
Braking Performance ◽  
Preliminary Results ◽  
Brake Application ◽  
Brake Force ◽  
Safety Range ◽  
Wheel Brake ◽  
Force Intensity

The application of single front wheel brake can yield large deceleration on underbone motorcycle. However, the motorcycle motion potentially exposed to the nosedive effect during this application. Therefore, in order to avoid this issue, the application of concurrent brake are required. Hence, this research was carried out to understand the basic braking performance for underbone motorcycle and elucidate the influenced of concurrent braking application involving the front and rear brake component. A theoritical study was carried out in this work through the derivation of motion equation for underbone motorcycle. The preliminary results showed that the total brake force and the brake force component acting on the front wheel had increased linearly with its deceleration intensity. Further study showed that in order to achieve higher safety range, the brake force applied on the front wheel should be at least 70% higher than the rear brake force intensity. This is probably due to the weight transferred condition during the underbone motorcycle braking.

Motorcyclists' Brake Operation, Motorcycle Brake Controls and a Case Study: The Need for Human Factors Engineering

2002 ◽  
Vol 46 (10) ◽  
pp. 890-894 ◽  
Author(s):  
Rudolf G. Mortimer
Keyword(s):  
Human Factors ◽  
Front Wheel ◽  
Human Factors Engineering ◽  
Braking Performance ◽  
Wheel Brake

A survey was made of the braking techniques reportedly used by 180 motorcyclists in a variety of conditions. Overall, the motorcyclists indicated that they used both front and rear brakes in hard braking 75% of the time on dry pavement and 47% on wet, but in other conditions they mostly used the rear brake first or exclusively. That the rear brake is preferred is not surprising because of the design of the brake controls and other reasons. Reliance on the rear brake at the expense of the front wheel brake leads to reduced deceleration. A crash case study exemplifies the effect. Integrated brakes, in which each brake control simultaneously activates the brakes on the front and rear wheels, are indicated by good human factors design and by motorcyclist's braking performance and should improve safety, especially when the brakes incorporate anti-locking mechanisms

scholarly journals Passive car safety system updating at head-on collision with lorry

2015 ◽  
Vol 2015 (4) ◽  
pp. 5-10
Author(s):  
Сергей Бишутин ◽  
Sergey Bishutin ◽  
Мария Дашунина ◽  
Mariya Dashunina
Keyword(s):  
Shock Absorber ◽  
General System ◽  
Front Wheel ◽  
Passive Safety ◽  
Pneumatic Cylinder ◽  
Front Side ◽  
Blow Energy ◽  
Life Saving ◽  
Car Safety ◽  
Brake Application

At emergency brake application before collision a car clearance decreases considerably, a car front side comes lower and actually does not participate in blow energy absorption. A car “dives under” a lorry and al-most all blow energy falls to the roof and windshield posts which do not figure on the perception of such a load that often results in fatal consequences. To reduce weight of consequences after such a collision there was developed a design for a passive car safety. The device consists of a ring pneumatic cylinder which is situated round a front shock strut next the upper bearing of a shock absorber and connected with a squib. It is intended for lifting and car body fixation along the height before a collision with a lorry. There are two such devices installed in a motor car, with one for each front wheel. It is not difficult to make this device there is no need in essential changes in the car design. It can be installed in any car with front posts of the type «macferson». The offered device is integrated in the general system of a car passive safety and at unavoidable head collision with a lorry is activated by means of a squib explosion. Key words: life-saving device, car, head-on collision, lorry.

Virtual prototype and field test study on hydraulic brake system performance of mining truck

2018 ◽  
Vol 233 (2) ◽  
pp. 236-253
Author(s):  
Xiaobin Fan ◽  
Jing Gan
Keyword(s):  
Pressure Rise ◽  
Virtual Prototype ◽  
Front Wheel ◽  
Simulation Software ◽  
Dump Truck ◽  
System Response ◽  
Prototype Model ◽  
Braking Performance ◽  
Emergency Braking ◽  
Braking System

In order to study the braking performance of mining dump truck, the modeling of the oil–gas suspension, front and rear brake of the dump truck were carried out first. Then the virtual prototype model of the dump truck was established in multibody dynamic simulation software. The simulation of braking and emergency braking performance, brake deviation on the flat road, and 9% downhill road were carried out. The brake in driving performance, emergency brake performance, disc brake retardance performance, transmission retardance performance, and hydraulic braking system response time were carried out by the real vehicle experiment, respectively. The result shows that the clearance elimination and pressure rise time of braking system are slightly long, especially the clearance elimination time, so the oil system should have an improvement. At the same time, the braking force distribution of the front and the rear is not reasonable, and the front wheel braking torque is slightly insufficient. After solving these problems by authors’ project team, the braking performance of the mine dump truck has been improved significantly.

A Robust Servo-Electronic Controller for Brake Force Distribution

1990 ◽  
Vol 112 (3) ◽  
pp. 442-447 ◽  
Author(s):  
M. A. Salman
Keyword(s):  
Rear Wheel ◽  
Front Wheel ◽  
Wheel Speed ◽  
Force Distribution ◽  
Response Data ◽  
Speed Tracking ◽  
Brake Force ◽  
Brake Force Distribution ◽  
Line Pressure ◽  
Electronic Controller

In this paper a control system which achieves ideal brake force distribution between the front and the rear wheels of a vehicle during normal braking is studied. Ideal brake proportioning is achieved by dynamically controlling the rear-wheel speed to track the front-wheel speed. Electro-hydraulic brake actuators, which are installed at the rear brakes of the vehicle, are used to modulate the brake-line pressure. A simple linear model of the actuators was developed. This model is derived from experimental response data. Based on this model, a robust servomechanism controller, which achieves ideal brake proportioning by rear-wheel speed control, is designed, implemented, and tested. Test results indicate that the robust servo-mechanism controller achieves a very good wheel speed tracking performance.

Dynamic Brake Force Distribution for Heavy Commercial Road Vehicles Using Wheel Slip Regulation

2019 ◽  
Author(s):  
Akhil Challa ◽  
K. B. Devika ◽  
Shankar C. Subramanian ◽  
Gunasekaran Vivekanandan ◽  
Sriram Sivaram
Keyword(s):  
Sliding Mode ◽  
Traction Force ◽  
Simulation Software ◽  
Force Distribution ◽  
Vehicle Dynamic ◽  
Road Vehicles ◽  
Wheel Slip ◽  
Braking Performance ◽  
Brake Force ◽  
Brake Force Distribution

Abstract Wheel lock is an undesired phenomenon in Heavy Commercial Road Vehicles (HCRVs) and wheel slip control within a desired range is of crucial importance for stable and effective braking. This study proposes a framework to distribute brake force dynamically between the front and rear wheels, primarily to avoid instability by preventing wheel lock. Further, it ensures the maximum utilization of the available traction force at the tire-road interface that varies during the course of braking due to factors like load transfer. Wheel slip regulation provides an approach to maximize braking performance that subsumes the effects of varying road, load and braking conditions that occur during vehicle deceleration. The methodology proposed consists of a wheel slip controller that calculates the required brake force distribution parameters, which are then provided to the brake controller for control action. Sliding mode control was used because of the nonlinear nature of the longitudinal vehicle dynamic model considered and for robustness towards different parameter variations. The algorithm was implemented on a Hardware-in-Loop test setup consisting of a pneumatic air brake system, interfaced with IPG-TruckMaker® (a vehicle dynamic simulation software), and co-simulated with MATLAB-Simulink®. It was found that this algorithm improved the braking performance of a HCRV both in terms of stopping distance and vehicle stability.

On Railroad Tank Car Emergency Braking Performance

2017 ◽  
Author(s):  
Kevin J. Renze
Keyword(s):  
Energy Conservation ◽  
Parametric Study ◽  
Signal Propagation ◽  
Propagation Rate ◽  
Distributed Power ◽  
Braking Performance ◽  
Train Derailment ◽  
Emergency Braking ◽  
Brake Force ◽  
Conservation Model

Crude oil and ethanol unit train derailments sometimes result in the release of large volumes of flammable liquids which ignite and endanger the safety of persons, property, and the environment. Current methods to reduce the probability and mitigate the consequences of High-Hazard Flammable Train (HHFT) derailments include operational speed constraints, enhanced tank car design/build requirements, improved car and track inspection and maintenance, and use of advanced braking systems. The train brake system can dissipate more energy in a derailment scenario if the brake signal propagation rate is increased, the brake force against the wheel tread is increased, or a combined approach is used. This paper describes a simplified energy conservation model used to determine the emergency braking stopping distance and energy dissipation benefits available for three advanced train braking systems. A 3×3 matrix of brake configurations was defined by three brake signal propagation rates and three car net braking ratio (NBR) values. The brake signal propagation rate was modeled for trains with conventional head-end locomotive power, pneumatic car braking, and no two-way end-of-train device (CONV); locomotive distributed power with pneumatic car braking (trailing DP); and locomotive power with electronically-controlled pneumatic (ECP) braking. Car NBR values of 10, 12.8, and 14 percent were selected to reflect the expected brake force range available from older equipment in the existing tank car fleet (10% NBR) to the maximum acceptable value for new or rebuilt cars (14% NBR). Various in-train emergency brake application scenarios for loaded unit trains were modeled while accounting for the gross effects of derailment/collision blockage forces. Empirical data from four trailing distributed power train derailment events were used to estimate an average derailment/collision blockage force (ADF) and simulate the trailing consist braking performance. The ADF results were subsequently used in a more general tank car unit train parametric study to evaluate the effects of train speed, track grade, and in-train derailment position for each brake configuration in the matrix. The simplified energy conservation model was used to 1) quantify the number of trailing consist cars expected to stop short of the derailment location and 2) compare the car-by-car energy state of each car in the trailing consist that was calculated to reach the derailment location. Results for the empirical and parametric study cases are compared graphically and observations are discussed relative to two assumed baseline brake configurations.

Regenerative Braking System for a Pure Electric Bus

2014 ◽  
Vol 543-547 ◽  
pp. 1405-1408 ◽  
Author(s):  
Jian Wei Cai ◽  
Liang Chu ◽  
Zi Cheng Fu ◽  
Li Peng Ren
Keyword(s):  
Control Strategies ◽  
Brake System ◽  
Regenerative Braking ◽  
Braking Performance ◽  
Braking System ◽  
Electric Bus ◽  
Brake Force ◽  
Braking Control ◽  
Vehicle Test ◽  
Brake Force Distribution

A design of regenerative braking system (RBS) for a pure electric bus was presented in this paper. A design of regenerative braking system for a pure electric bus was presented in this paper The control of regenerative braking was achieved by Pneumatic ABS and improve braking energy recovery under the premise of ensure braking performance. Regenerative braking control algorithm was mainly composed of two parts for the identification of the drivers intention and the brake force distribution. The regenerative brake control model was built in the matlab/simulink environment, rapid prototyping control was achieved by Autobox and vehicle test was carried on. Result shows that the control strategies can effectively make the pneumatic brake system and motor brake system work harmoniously.

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