• Title/Summary/Keyword: ECU control

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Output Characteristics Using Indirect Measurement of Air Flow in a Motorcycle Engine (흡입공기량 간접계측방식의 전자제어화 Motorcycle 엔진 출력 특성)

  • Jung Taegyun;Chae Jaeou
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.3
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    • pp.87-95
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    • 2005
  • Most of the motorcycle engines have used carburetors in the fuel system, because of its simple structure and reliability but the fuel economy and the emissions of those engines are bad when we compared with automobile engines .To meet with the tighten emission regulations and the higher requirements for fuel economy, the application of the carburetor on the motorcycle engines would be limited. Therefore, it is important to develope a ECU control system for motorcycle engines. Since the fuel injection system is expensive, it is necessary to decrease the cost of ECU system for motorcycle engines, but the accuracy of the ECU control system should be increased as high as possible. In this paper, we studied about the AFS characteristics of motorcycle engine controled by indirect method.

ECU Software Development for Encryption Transponder-type Immobilizer (인크립션 트랜스폰더 타입 이모빌라이져 ECU 소프트웨어 개발)

  • Choi, Ho-Jun;Lim, Dong-Jin
    • Proceedings of the KIEE Conference
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    • 1998.07b
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    • pp.669-671
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    • 1998
  • Engine immobilizer is the automobile security system which disables the engine if the secrete code in the transponder embedded in the key knob is not in agreement with the code in ECU of the car. There are many types of immobilizer systems, however, the encryption transponder type system is the most secure system due to the code verification method using an encryption method. As an example of the industry-university cooperation, the software development in the system is introduced in this paper.

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A Study on Model-based Mode Management Development Process for AUTOSAR Compliant ECU (AUTOSAR 기반 ECU의 모델 기반 모드관리 개발 기법에 관한 연구)

  • Kwon, Jaehee;Sunwoo, Myungho;Lee, Wootaik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.25 no.1
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    • pp.116-126
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    • 2017
  • We suggest a process for the basic software configurations and application development in the mode management design of AUTOSAR-based ECU. Mode management is an essential task and AUTOSAR provides the mode management components for the runtime state handling of an ECU, such as BswM, application mode manager and RTE. BswM is used to meet the custom's requirements for ECU state handling. The behavior of BswM is configured with a set of rules in the form of "if-else" statements, so it is a complicated job and a potential source of errors as the number of rules increases. These difficulties can be overcome using the Model-Based Development approach, which is widely used in the AUTOSAR SW development. An efficient process is proposed to apply the MBD approach to the BswM configuration. An application mode development process is also proposed to improve the mode management design by combining the MBD process. Development tools are developed to adapt these proposed processes to the traditional ones. Simulation and experimental results are provided to prove the feasibility of the proposed approach.

Design of PIFA type Spiral Antenna for Vehicle RKE Reader (차량 RKE 리더기용 PIFA형 스파이럴 안테나의 설계)

  • Oh, Dong-Jun;Yun, Ho-Jin;Jeong, Bong-Sik
    • Journal of the Institute of Convergence Signal Processing
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    • v.9 no.2
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    • pp.135-140
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    • 2008
  • In this paper, the spiral antenna with the center frequencies of 315MHz, 433MHz, and 447MHz for RKE system of a vehicle is designed on PCB. The antenna is microstrip line-fed, and applied PIFA concept near the feeding part to easily tune center frequency and input impedance. The PIFA-type spiral antenna with the size of $30mm{\times}20mm$ is designed on printed PCB by considering the effect of circuits and components on PCB, ECU case and vehicle body. Also chip inductor inserted dual-band spiral antenna of 315MHz and 447MHz is designed. We found that the antenna designed on PCB satisfied the antenna specifications through measurement and field test.

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The Development of an Automatic Shooting Range System Using CAN (CAN을 이용한 자동화 사격장 시스템 개발)

  • 허화라;최승욱;권구남
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.1 no.2
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    • pp.41-48
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    • 2000
  • Recently, the requirement of automation in the every fields of the industrial places has been increased remarkably. The shooting range systems in the Past have been designed on the basis of static circumstance. However, Various transformation of the shooting circumstances is required, since the target for real shooting situation not static. In this study we have established for targets Per one shooting line to realize the dynamic shooting circumstance, distributed shooting order into sequence and random ones. and accommodated the shooting time variably. And, we have done an efficient communication possible, using CAN(Controller Area Network) applied to a lot of the car and the building automation. The CAN can support real-time control efficiently by connecting multiple ECU(Electric Control Unit), since it provide the high data transfer rate and the stability of communication.

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A Study on the Design of Electronic Control Unit for Antilock Brake System (전자제어식 미끄럼 방지 제동장치의 제어기 설계에 관한 연구)

  • Ha, Yeon-Chul;Cho, Jeong-Mok;Shin, Byung-Chul;Hwang, Don-Ha;Park, Doh-Young;Kim, Yong-Joo
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.2345-2347
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    • 2000
  • ABS(Antilock Brake System) prevents the wheels from "locking" and improve "handling" during braking. Currently, safety and environmental issues are a major concern in the automotive industry. ABS has become the vital brake system. ABS is composed of sensors for wheel speed, a pressure modulator for controlling the brake pressures in the wheel brake cylinders, and an electronic control unit(ECU) which evaluates the signals from the wheel speed sensors and converts these to commands to control the pressure of modulator. In this paper, ECU developed for commercial vehicles is described. Detection of wheel slip, control algorithms of ABS, and diagnosis method of ECU are presented.

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Starting and Normal Operation Control Logic Research of Small Gas Turbine Engine (소형 가스터빈엔진의 시동 및 정상운용구간 제어로직 연구)

  • Lee, Kyungjae;Rhee, Dong-Ho;Kang, Young Seok;Kho, Seonghee
    • Journal of the Korean Society of Propulsion Engineers
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    • v.25 no.5
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    • pp.1-9
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    • 2021
  • As part of the commercialization research of small gas turbine engines, starting and normal operation control logic research of small gas turbine engine was conducted. It was investigated how the igniter, starting motor and fuel pump/valve are controlled during the ignition and normal operation process and it was applied to the prototype engine control unit(ECU) of the small gas turbine engine for commercialization research. Based on the ground test results, an ECU for flight test is being developed, and after completion of the development, an altitude test will be performed through an altitude test facility of Korea Aerospace Research Institute.

An Experimental Study on the Safety Standard of Electronic Throttle Control System (전자식 가속제어장치 안전기준에 대한 실험적 고찰)

  • Yun, Kyungcheol;Yong, Geejoong
    • Journal of Auto-vehicle Safety Association
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    • v.11 no.1
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    • pp.48-54
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    • 2019
  • Optimal engine control is needed to cope with the global environmental regulations that are globally enforced. For optimum engine control, the electronic throttle control system (ETCS) is a prerequisite. Automotive makers are having an effect on reducing emissions and improving fuel economy by applying ETCS which is designed to secure stability. The ETCS controls the output of the throttle valve by passing the output value of the accelerator position sensor (APS) to the engine control unit (ECU). In this study, the authors investigated the safety standards of domestic and overseas accelerator control system and tried to understand how the air flow control affects the engine output by replacing the throttle. The authors suggest an improvement proposal of safety standard based on the result of driving evaluation by various modes.

Fuel Economy Improvement Cruise Control Algorithm using Distance and Altitude Data of GPS in Expressway (고속도로에서 GPS 거리와 고도데이터를 이용한 연비 향상 정속 순항 제어 알고리즘)

  • Choi, Seong-Cheol;Lee, Jong-Hwa
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.6
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    • pp.68-75
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    • 2011
  • A vehicle fuel economy is very important issue in view of fuel cost and environmental regulation. It has been improved according to the performance improvement of the vehicle engine, power train and many components. It was evaluated at given mode (LA-4, FTP-75, etc) on an engine dynamometer or computer simulation program. In this paper, the fuel economy improvement cruise control algorithms as controling a vehicle velocity by road load calculated and predicted in a real expressway with gradient was studied. Firstly, the altitude and distance data which was measured with GPS sensor was already installed in the ECU of a vehicle. Then the vehicle equipped with GPS receiver is driven the same expressway. The ECU calculates the gradient angle and the in-/decreasing velocity using the gradient angle by comparing the current received distance and altitude data from GPS with the saved data ahead of the vehicle. Therefore the ECU can calculate and predict the vehicle velocity considering tolerance velocity of next position with running. Then the ECU controls the vehicle velocity to meet this predicted velocity in all section. Three cruise control algorithms with the different velocity profiles for the improvement of fuel economy are proposed and compared with the computer simulation results that the vehicle runs on Youngdong expressway. The proposed CVELCONT2 and CVELCONT3 algorithms were improved 3.7% and 4.8% of fuel economy compared with CONSTVEL which is steady cruising algorithm. These two algorithms are recommended as the Eco-cruise drive methodologies in this paper.

A Modeling of Realtime Fuel Comsumption Prediction Using OBDII Data (OBDII 데이터 기반의 실시간 연료 소비량 예측 모델 연구)

  • Yang, Hee-Eun;Kim, Do-Hyun;Choe, Hoseop
    • KIPS Transactions on Software and Data Engineering
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    • v.10 no.2
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    • pp.57-64
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    • 2021
  • This study presents a method for realtime fuel consumption prediction using real data collected from OBDII. With the advent of the era of self-driving cars, electronic control units(ECU) are getting more complex, and various studies are being attempted to extract and analyze more accurate data from vehicles. But since ECU is getting more complex, it is getting harder to get the data from ECU. To solve this problem, the firmware was developed for acquiring accurate vehicle data in this study, which extracted 53,580 actual driving data sets from vehicles from January to February 2019. Using these data, the ensemble stacking technique was used to increase the accuracy of the realtime fuel consumption prediction model. In this study, Ridge, Lasso, XGBoost, and LightGBM were used as base models, and Ridge was used for meta model, and the predicted performance was MAE 0.011, RMSE 0.017.