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Brake Dynamo Data를 기반으로 한 제동성능예측
백봉범(BongBum Back),오정용(Jungyong Oh),구형찬(Hyoungchan Koo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, the vehicle modeling process using BrakeSyn has been studied for Brake system development. For most motor companies, it is the main task to improve own competitiveness through reducing development time and cost. But, this is difficult due that a lot of tests is needed to achieve good performance and quality. As a solution of this conflict, motor companies have tried to substitute road tests by simulation. BrakeSyn is the simulation tool created by GM (General Motors Inc.). BrakeSyn has been mainly used for the brake performance simulation in GM. BrakeSyn has a merit on easy use and quick result acquisition with its convenient interface. Also, BrakeSyn can simulate the brake performance like brake balance, brake pedal feel, etc. Generally. whenever vehicle brake system is changed during development. additional time and cost are needed for new brake system development. BrakeSyn could be an effective tool to reduce this overlapping time and cost. In this paper, current vehicle modeling process using BrakeSyn has been specified and studied. Based on this study, it is the final purpose of this paper to contribute to reduce the vehicle development time and cost using reliable simulation result.
백봉범(Bongbum Back),오정용(Jungyong Oh),구형찬(Hyoungchan Koo),양인석(Insuk Yang),김세혁(Sehyuk Kim),김영훈(Younghoon Kim),김한규(Hankyu Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The brake test during mountain descent is very important validation procedure at Car makers. Especially, in case of Korea car makers, They have designed the brake that was not occurred the vapor lock during Mt.Chiri descent with braking for Korea customers. Vapor lock is the dangerous phenomenon for driver and passengers who are driving on winding road at mountain. It makes driver cant stop the vehicle due that the brake fluid cannot transmit the brake line pressure in brake pipe from brake pedal to brake pads/linings in brake calipers / drum brakes. So, This brake test is essential a vehicle test procedure. This paper is based on Wearpro software was made by GM. and Brake Conner FE model analysis in order to predict the brake fluid temperature rise during Mt.Chiri descent. and To improve reliability of vehicle simulation model, We found brake dyno test is very helpful. and this paper is good approach concept for brake development such as saving cost and reducing development timing at beginning of Car project without vehicle level test by Brake CAE and Lab tests.
Brake Pull 개선을 위한 현가장치 기구설계에 대한 연구
노승진(Seungjin Noh),신상하(Sangha Shin),서정원(Jungwon Seo),백봉범(Bongbum Back) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
A vehicle which has a weight condition of one passenger is shows pull/drift during braking. The brake pull can cause sudden vehicle drift. It is important vehicle characteristic because it is related straight-line driving stability. This pull/drift is caused by the difference between front left and right weight. So there is not fundamental solution without adjusting the weight. But suspension design can reduce the brake pull. This paper presents suspension design for pulling behavior during braking.
김영훈(Younghoon Kim),강오성(Ohsung Kang),조은희(Eunhee Cho),백봉범(Bongbum Back),최상열(Sangyeol Choi),이희욱(Heewook Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The one of requirements for brake module in vehicle is that the brake fluid must stay on the phase of liquid. When the brake fluid has vaporized the brake cannot stop the vehicle. This paper describes three dimensional transient thermal analysis to predict brake fluid temperature rising in repetitive braking such as Mountain Chiri descent schedule. Temperature profile for analysis input was generated with Wearpro, in-house software. Full vehicle CFD analysis was perfomed to consider convection heat transfer of brake corner. Analysis result was compared to physical test result to confirm reliability of this anlaysis. This study will be helpful for developing thermal performance of brake corner module in early stage of vehicle development.
Brake Squeal Noise를 유발하는 Brake Contact Interface와 Rotor의 In-Plane Modes에 관한 연구Ⅱ
김경수(Kyungsoo Kim),조호준(Hojoon Cho),김두영(Dooyoung Kim),최원석(Wonseok Choe),박영준(Youngjoon Park),백봉범(Bongbum Back),김한규(Hankyu Kim),고승석(Seungseok Ko),정명구(Myoungkoo Chung) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
For many years, brake noise has been one of the top automotive brake warranty issues, and many studies have been conducted to reduce the squeal phenomenon by improving the rotor-pad contact interface or by decoupling modes inducing squeals. This is additional research of ‘A study of Brake Contact Interface and Rotor In-Plane Modes Induced Disc Brake Squeal noise’. This paper considers the different brake contact interfaces affecting high frequency brake squeal and introduce an effective way of reducing the problem by improving one of the brake secondary contacts. Furthermore, the reason of improving of brake secondary contact has a positive effect is investigated by modal analysis & squeal noise analysis.