• 제목/요약/키워드: ECU control

검색결과 251건 처리시간 0.025초

Misfire Detection by Using the Crankshaft Speed Fluctuation(2) : Vehicle Test (크랭크축 각속도의 변동을 이용한 실화 판정(2) - 실차 실험)

  • 배상수;김세웅;임인건;김응서
    • Transactions of the Korean Society of Automotive Engineers
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    • 제4권5호
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    • pp.90-99
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    • 1996
  • To keep up with the regulation of OBD II(on board diagnostics II), many detection methods for engine misfire have been developed. Among them, the method of using the crankshaft speed fluctuation is the most noticeable in the point of view of lower cost and easier installation than any others. On the basis of the results obtained from the previous engine-dynamometer test, the integrating torque index (ITI) has been introduced. In this research, the instrumental and the interfacing systems to engine control unit(ECU) are developed for the vehicle test. Therefore, the vehicle and chassis-dynamometer test can be carried out in addition to the rough road test. From this test, the previousproposed method proved that it can be applied to the real vehicle.

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Research for parameter estimation method by basis of Real vehicle data (실차 데이터 기반 차량 파라미터 추정을 위한 기법 연구)

  • Hong T.W.;Park K.;Heo S.J.;Park L.H.;Lee K.W.;Cho Y.J.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 한국정밀공학회 2005년도 춘계학술대회 논문집
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    • pp.1091-1094
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    • 2005
  • This paper formulates the parameter estimation of cornering behavior of a vehicle. Especially some vehicle parameter is very important on stability control of chassis by ECU, but some parameter is so hard to get by sensor which parameter is included the nonlinear characteristic of tire cornering force. So we need to deduce that parameter from used signal and numerical method. In this study, we propose a estimation method and present the simulation by parameter estimation technique.

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3D FE Analysis of Hall Effect Torque Sensor and Shape Design of Its Stator teeth (홀소자 토크센서의 3차원 유한요소해석 및 고정자 치 형상설계)

  • Lee, Bo-Ram;Kim, Young-Sun;Park, Il-Han
    • Proceedings of the KIEE Conference
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    • 대한전기학회 2009년도 제40회 하계학술대회
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    • pp.702_703
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    • 2009
  • Electric Power Steering(EPS) system is superior to conventional Hydraulic Power Steering(HPS) system in aspect of fuel economy and environmental concerns. The EPS system consists of torque sensor, electric motor, ECU(Electric Control Unit), gears and etc. Among the elements, the torque sensor is one of the core technologies of which output signal is used for main input of EPS controller. Usually, the torque sensor has used torsion bar to transform torsion angle into torque. The torsion angle of both ends of a torsion bar is measured by a contact variable resistor. In this paper, the sensor is accurately analyzed using 3D finite element method and its characteristics with respect to four different shapes of the stator teeth are compared. The four shapes are rectangular, triangular, trapezoidal and circular type.

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A Study on Design and Development of the Electronically Controlled Power Steering Controller far a Passenger Car (승용차용 전자계어식 파워스티어링 콘트롤러의 설계 및 개발에 관한 연구)

  • 김광열;김태훈
    • Transactions of the Korean Society of Automotive Engineers
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    • 제10권4호
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    • pp.166-174
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    • 2002
  • Power steering systems far automobile are becoming ever more popular because they reduce steering efforts of the drivers, especially during parking lot maneuver. In this paper, the controller of the motor driven hydraulic power steering(MDHPS) has been designed and developed. This system uses a power source of DC motor instead of engine power source for power steering drive oil pump. The developed MDHPS system is accomplished a highly sensitive power steering resulted from electronic control under variable driving condition. Furthermore, this system is more improvement than type of engine driving far fuel economy.

Comparisons of Linear Characteristic for Shape of Stator Teeth of Hall Effect Torque Sensor

  • Lee, Boram;Kim, Young Sun;Park, Il Han
    • Journal of Magnetics
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    • 제17권4호
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    • pp.285-290
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    • 2012
  • Electric Power Steering (EPS) system is superior to conventional Hydraulic Power Steering (HPS) system in aspect of fuel economy and environmental concerns. The EPS system consists of torque sensor, electric motor, ECU (Electric Control Unit), gears and etc. Among the elements, the torque sensor is one of the core technologies of which output signal is used for main input of EPS controller. Usually, the torque sensor has used torsion bar to transform torsion angle into torque and needs linear characteristic in terms of flux variation with respect to rotation angle of permanent magnet. The torsion angle of both ends of a torsion bar is measured by a contact variable resistor. In this paper, the sensor is accurately analyzed using 3D finite element method and its characteristics with respect to four different shapes of the stator teeth are compared. The four shapes are rectangular, triangular, trapezoidal and circular type.

Design and Implementation of OSEK/VDX Development Tool for Automotive Applications (OSEK/VDX 기반의 차량 전장용 응용개발도구 설계 및 구현)

  • Ahn, SungHo;Kim, JaeYoung;Kim, GwangSu
    • IEMEK Journal of Embedded Systems and Applications
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    • 제4권2호
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    • pp.84-89
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    • 2009
  • This paper describes the development tool for applications of automotive electronic control unit based on OSEK/VDX. This development tool has a plug-in structure and is written in Java language, because of being based on Eclipse CDT. And also this development tool has another functionality of expansion, which means a special function block can be easily adopted in this development tool. Currently, this development tool consists of five blocks, which are integrated development environment block, fusing program block, system generation block, debugger block, and cross-compiler toolchain block. They have relationship between each other and work for developing OSEK/VDX-based applications. In this paper, we show the functionality of each block of this development tool and its implementation.

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The Design and Implementation of a Driver's Emotion Estimation based Application/Service Framework for Connected Cars (커넥티드 카를 위한 운전자 감성추론 기반의 차량 제어 및 애플리케이션/서비스 프레임워크)

  • Kook, Joongjin
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • 제67권2호
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    • pp.100-105
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    • 2018
  • In this paper, we determined the driver's stress and fatigue level through physiological signals of a driver in the connected car environment, accordingly designing and implementing the architecture of the connected cars' platforms needed to provide services to make the driving environments comfortable and reduce the driver's fatigue level. It includes a gateway between AVN and ECU for the vehicle control, a framework for native applications and web applications based on AVN, and a sensing device and an emotion estimation engine for application services. This paper will provide the element technologies for the connected car-based convergence services and their implementation methods, and reference models for the service design.

Development of the Non-Contact Torque Sensor for EPAS Using Maluss Polarization Law (Malus의 편광법칙을 이용한 EPAS용 비접촉 torque sensor 개발)

  • Roh, Byung-Ok;Park, Ho;Kang, Pan-Shik
    • Transactions of the Korean Society of Mechanical Engineers A
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    • 제25권7호
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    • pp.1039-1046
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    • 2001
  • Among the automotive steering systems, an Electric Power Assisted steering (EPAS) system utilizes an electronically controlled electric motor to provide steering assistance to the driver. The key components of the EPAS system are torque sensor, ECU (Electronic Control Unit), and DC Motor. The most important component of the EPAS is the torque sensor. The conventional torque sensor has complicated mechanical mechanism of torque detection. However, we suggest a non-contact torque sensor for EPAS using Maluss polarization law. It was found that the sensor exhibited not only excellent linearity but also superior characteristics of hysteresis, temperature and vibration.

Application of a Brake Pressure Restriction Valve to a Motorcylce ABS (제동압력 제한밸브의 모터싸이클 ABS에의 적용)

  • 지동익;류제하;김호수;임재우;박종혁
    • Transactions of the Korean Society of Automotive Engineers
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    • 제9권2호
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    • pp.130-136
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    • 2001
  • This paper presents an of a brake pressure restriction valve to a motorcycle anti-lock brake system(ABS). In the conventional anti-lock brake system of automobiles, slip ratio as a control variable is actively controlled, which requires wheel speed sensors, ECU, and a pressure modulator. In the ABS valve that has been developed for use in motorcycles, however, the brake pressure that is close to the wheel locking pressure is preset by simple exercises and then the valve just allows to pass the wheel locking pressure and cutoff the remaining pressure. Simulation studies with a single wheel braking dynamics and lumped chassis model show that the pressure restriction valve has basic ABS functions as well as some robustness properties for the uncertain load and road conditions as well as various initial braking speeds. Field tests also show that the pressure restriction valve avoids the wheel locking effectively.

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DEVELOPMENT OF OCCUPANT CLASSIFICATION SYSTEM BASED ON DISTRIBUTED SYSTEM INTERFACE

  • Chang, K.B.;Lee, C.K.;Park, G.T.
    • International Journal of Automotive Technology
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    • 제7권2호
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    • pp.195-199
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    • 2006
  • According to the United States FMVSS 208, every passenger car on the market after September of 2006 must install a safety system, which can deploy the airbag with different intensity or suppression based on the passenger type, to reduce infant and child injuries from airbag deployments. The Weight Classification System, which has been developed by Hyundai Autonet, is a system that classifies the person occupying the passenger seat. To overcome sensing problems due to the weight sensors small voltage, the Distributed Systems Interface is adopted.