• 제목/요약/키워드: automotive seat

검색결과 242건 처리시간 0.037초

The development of Dy free MAGFINE and its applications to Motors

  • Honkura, Yoshinobu
    • 한국자기학회:학술대회 개요집
    • /
    • 한국자기학회 2013년도 자성 및 자성재료 국제학술대회
    • /
    • pp.95-95
    • /
    • 2013
  • The NdFeB magnet can be classified into the sintered magnet and bonded magnet. The former has superior magnet characteristics but the degree of freedom in shape is highly restricted, whereas the latter has a high degree of freedom, but its magnet characteristics are inferior to the former. When a NdFeB magnet is used at the elevated temperature, part of Nd must be replaced with a high priced Dy to increase its coercive force. For these reasons, a Dy free and high performance NdFeB bonded magnet is desired strongly. The author successfully developed a Dy free NdFeB anisotropic bonded magnet based on discovery of new phenomena called as d-HDDR reaction and its mass production process such as a thermally balanced hydrogen reaction furnace, micro capsuled powder, compression molding / injection molding under magnetic field, magnetic die and so on. Applied to DC brush seat motor for automotive use, the motor has become 50% small in size and weight. The commercialization of a half sized motor for automotive use has been realized up to the market share of 30%. At present, its commercialization is extending to various types of motors such as power tool, ABS motor, wiper motor, window motor, electric bike power motor, and compressor motor. It is expected that the applications will be increasingly enlarged to EV motor, wind generator, EPS motor, washing machine, and glass cutting machine. This innovative technology has realized Dy free high performance magnet and mudt make big contribution to not only rare element strategies but also energy conservation.

  • PDF

밸브 양정의 연속 변화에 의한 준정상 유동 조건에서의 엔진 실린더헤드 유량계수 특성 (Characteristics of Flow Coefficients in an Engine Cylinder Head with a Quasi-steady Flow Condition by Continuous Variation of the Valve Lift)

  • 오대산;이충훈
    • 한국안전학회지
    • /
    • 제25권6호
    • /
    • pp.22-27
    • /
    • 2010
  • Flow Coefficients of intake port in an engine cylinder head were measured by a newly designed flow rig. In measuring the flow coefficient with traditional method, the valve lift was manually varied by technician with adjusting a micrometer which is directly connected to the intake valve of the cylinder head. The cam shaft of the cylinder head is directly rotated by a step motor and the valve lift was automatically varied with cam shaft profile in the newly designed flow rig. The measurement of the flow coefficient was automated by rotating the cam shaft with the step motor. Automatic measurement of the flow coefficient could be safely measured by separating a technician from the noise and vibration of the traditional flow rig. Also, the automatic measurement of the flow coefficient reduce the measurement time and provide meaningful statistical data.

SI 엔진의 밸브 리프트에 따른 흡입 포트 및 실린더내 정상 3차원 유동장 해석 (Three-Dimensional Analysis on Induction Port and In-cylinder Flow for Various Valve Lifts in an SI Engine)

  • 김영남;이경환
    • 한국자동차공학회논문집
    • /
    • 제3권5호
    • /
    • pp.82-89
    • /
    • 1995
  • The three-dimensional fluid motion through the intake port and cylinder of a single DOHC SI engine was investigated with a commercial computational fluid dynamics simulation program, STAR-CD. This domain includes the intake port, intake valves and combustion chamber. Steady induction port flows for various valve lifts have been simulated for an actual engine configuration. The geometry was obtained by direct interface with a three-dimensional CAD software for complicated port and valve shape. The computational grid was generated using the commercial preprocessor ICEM CFD/CAE. Detailed procedures were presented on the generation of the geometry and the block-structured mesh. A standard k-${\varepsilon}$ turbulent model was applied to consider the complexity of the geometry and the fluid motion. The global flow patterns and the distributions of various quantities, such as pressure, velocity magnitude around the valve seat etc., were examined. The computational results, such as mass flow rate, discharge coefficient etc., for various valve lifts were compard with the experimental results and the computational results were found in good agreement with the experiment.

  • PDF

COMPARISON OF RIDE COMFORTS VIA EXPERIMENT AND COMPUTER SIMULATION

  • Yoo, W.S.;Park, S.J.;Park, D.W.;Kim, M.S.;Lim, O.K.;Jeong, W.B.
    • International Journal of Automotive Technology
    • /
    • 제7권3호
    • /
    • pp.309-314
    • /
    • 2006
  • In this paper, the ride comfort from a computer simulation was compared to the experimental result. For measuring ride comfort of a passenger car, acceleration data was obtained from the floor and seat during highway running with different speeds. The measured acceleration components were multiplied by the proper weighting functions, and then summed together to calculate overall ride values. Testing several passenger cars, the ride comforts were compared. In order to investigate the effect of vibration signals on the steering wheel, an apparatus to measure the vibrations and weighting functions on the steering wheel were designed. The effect of the steering accelerations on the ride comfort were investigated and added for the overall ride comfort. For the computer simulations, Korean dummy models were developed based on the Hybrid III dummy models. For the Korean dummy scaling, the national anthropometric survey of Korean people was used. In order to compare and check the validity of the developed Korean dummy models, dynamic responses were compared to those of Hybrid III dummy models. The computer simulation using the MADYMO software was also compared to the experimental results.

차량 창문 개폐에 따른 내부에서의 유동 해석으로의 융합적 고찰 (Convergent Investigation with Internal Flow Analysis According to the Opening and Closing of Vehicle Window)

  • 오범석;조재웅
    • 한국융합학회논문지
    • /
    • 제11권2호
    • /
    • pp.155-160
    • /
    • 2020
  • 본 연구에서는 자동차 창문의 개폐에 따라 공기의 내부 유동 해석을 통하여 여름철에 운전자와 동승자의 쾌적한 운전환경을 고찰하였다. 실제 운전 환경을 고려하여, 자동차 창문 개폐 상태로서의 에어컨 입구 조건들을 유동 해석에 적용하였다. 자동차 에어컨 토출구, 시트 그리고 실내를 모델링하였고, 차 내부에서의 공기유동을 해석하여 공기의 유동형상과 내부의 온도분포를 확인하였다. 본 해석에서는 공기 유입부와 배출구를 정하고 자동차 내부를 단열상태로 가정하고 내부공기와 창문 개폐의 영향만을 고려해서 결과를 보았다. 각 조건들의 해석을 고찰해보면 본 연구 모델들이 쾌적한 환경이 유지됨을 알 수 있었다. 차량 창문 개폐에 따른 내부에서의 유동에 대한 본 해석 결과는 디자인 분야에 융합하여 적용될 수 있다고 보인다.

금속과 플라스틱의 최신접합기술 (Latest Joining Technology of Metal and Plastic)

  • 김영식;길상철
    • Journal of Welding and Joining
    • /
    • 제34권3호
    • /
    • pp.31-39
    • /
    • 2016
  • The joining technology of the metal and engineering plastic is rising lately as the important issue in concerning with the method of reducing the weight and air pollution of the transportation structure such as automotive and vehicles. The metal/ plastic joining technology has been developed in 2 types of adhesively bonding and direct joining without adhesives. Moreover, in the direct joining method, there are 2 kinds of mechanical joining and welding. This review paper presents the present world wide status and tendency of the development of metal/plastic joining technology. This article intends to offer the materials for development and raising of the domestic metal/plastic joining technology.

유압식 6자유도 가진 테이블을 이용한 자동차부품 내구성능 평가 기술 (Durability Performance Evaluation of Automotive Components Using Hydraulic 6 Axis Simulation Table)

  • 최규재
    • 드라이브 ㆍ 컨트롤
    • /
    • 제5권1호
    • /
    • pp.11-16
    • /
    • 2008
  • 자동차 부품은 주행 중 전후, 좌우, 상하방향의 병진 운동과 각 축에 대한 회전 운동 등 6자유도의 운동을 받는다. 이와 같은 운동에 따라 자동차에 탑재되는 운전석(cockpit), 의자(seat), 연료탱크, 라디에이터, FEM(front end module) 등의 부품 및 모듈 등은 6자유도 운동을 받으면서 각 부품의 기능을 수행하고 있다. 따라서 이들 부품을 짧은 시간 내에 개발하기 위해서는 가속내구시험평가가 필수적인데 이를 위해 유압식 6자유도 가진 테이블을 이용한 기술이 활용되고 있다. 본 해설에서는 자동차 부품 및 모듈의 내구성능 평가 과정과 함께 유압식 6자유도 가진 테이블을 보유하고 관련 부품의 진동내구성능을 평가하고 있는 군산대학교 자동차부품기술혁신센터(KATIC)의 시험 평가장비 및 사례를 기술하였다. 이와 같은 자동차 부품 내구성능평가 방법과 6자유도 가진 테이블을 이용한 시험은 향후 자동차부품 및 일반기계부품 개발업체에서 내구성능향상을 위하여 활용도가 더욱 증대될 것이다.

  • PDF

LQG/LTR제어기법을 이용한 자동차 서스펜션 시스템의 진동제어 (Vibration Contol of Automotive Suspension System using the LQG/LTR Control Methodology)

  • 안정근;송창훈;유삼현;이종원
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 추계학술대회논문집A
    • /
    • pp.646-653
    • /
    • 2001
  • LQG/LTR Control Methology is recently used for the analysis of multi-variable control in frequency domain. Target filter loop is designed by the demanding requirements such as cross-over frequency, disturbance rejection in low frequency domain, zero steady-state error, identification of maximum and minimum singular values and sensor noise rejection in high frequency domain. Loop transfer recovery is accomplished by solving the cheap control and then simulation close to the target filter loop. In this study, LQG/LTR Control Methodology is applied to the seat suspension system. It is found that this technique is very effective to control the system and improve the ride quality of human body.

  • PDF

신경회로망을 이용한 능동형 현가장치 제어기 설계 (The Design of Neuro Controlled Active Suspension)

  • 오정철;김영배
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1994년도 추계학술대회 논문집
    • /
    • pp.414-419
    • /
    • 1994
  • In recent years, there has been an increasing intest in control of active automotive suspension systems with a goal of improving the ride comfort and safety. Many approaches for these purposes have used linearized models of the suspension's dynamics, allowing the use of linear control theory. However, the linearized model does not well descriibe the actual system behavior which is inherently nonlinear. The object of this study is to develop a neuro controlled active suspension for the ride quality improvement. After obtaining active control law using optimal control theory, we use the artificial neural network to train the neuro controller to learn the relation of road input and control force. Form the numerical results, we found that back propagation learning does show good pattern matching and vertical acceleration of the driver's seat and sprung mass.

  • PDF

한국인의 앉은 자세에 대한 동적 질량의 실험적 연구 (Experimental Investigation on the Characteristics of Dynamic Masses of Korean-Seated Postures)

  • 박용화;정완섭
    • 소음진동
    • /
    • 제10권6호
    • /
    • pp.1017-1021
    • /
    • 2000
  • This paper addresses experimental results carried out to investigate the characteristics of dynamic mass for Korean. Vertical seat vibration in the frequency range of 0.5-30 Hz was applied to a seated Korean male subject. To examine the intra-variable effects on dynamic mass, five different postures and three different vibration excitation levels were considered. The applied acceleration and transmitted force to the hip of the seated subject were measured simultaneously. Detailed experimental results of measured dynamic mass are illustrated for each posture and/or vibration excitation level. Maximum peaks of around 5 Hz were observed for most experimental cases. They are found to allow the identification of dynamic characteristics of Korean seated body for various real vibration environments. Furthermore, they are expected to be very useful in designing new seats for automotive and railway vehicles and in improving their vibration ride duality.

  • PDF