• Title/Summary/Keyword: engine ECU

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A Study on Characteristics of Knocking in Gasoline Engine through ECU Control (ECU 제어를 통한 가솔린 엔진의 노킹 특성에 관한 연구)

  • Yang, Hyun-Soo;Lim, Ju-Hun;Chun, Dong-Jun
    • Journal of the Korea Safety Management & Science
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    • v.10 no.3
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    • pp.109-115
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    • 2008
  • A burning principle in gasoline engine is the one of being burned, by which a mixer in air and gasoline enters a combustion chamber and causes a spark in the proper timing. This is formed, by which ECU controls the fuel-injection volume and the fuel-injection timing, and determines the performance of engine. The purpose of this study is to test the characteristics on knocking in gasoline engine with the knocking-sensor equipment and to research into the characteristics in knocking while directly controling the optimal igniting timing and the fuel-injection timing through engine ECU. Given controlling ECU by grasping the characteristics in knocking, which becomes the most problem in the engine tuning market, the tuning in a true sense will be formed in gasoline engine.

Design and Application of Accelerated Run-in Test for ECU Quality Improvement (ECU 품질 개선을 위한 Accelerated Run-in Test 설계 및 효과고찰)

  • Cho, Hyogeun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.4
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    • pp.145-151
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    • 2014
  • Modern vehicle has a lot of ECU(Electronic Control Unit) products to control many parts such as engine, transmission, brake, body and so on. ECU quality is one of important factors related to vehicle quality and driver's safety. Based on Bath-tub curve which presents failure rate during product lifetime, we designed and applied Accelerated Run-in Test into manufacturing line by simulating stress amount to ECU and developing the required software and efficient test equipment for mass production. This test makes ECU products stressed through electrical and thermal stresses under excessive driving condition, which induce potential initial failure of components in the ECU during production. The outcome until these days proved that Acceleration Run-in Test have reduced initial failure rates and increased quality of ECU products in the field outstandingly.

Distributed ECU System Design for High Speed and High Precision Control of a Marine Engine

  • Lee, Jong-Nyun
    • Journal of information and communication convergence engineering
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    • v.8 no.5
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    • pp.534-538
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    • 2010
  • Efficient control of a marine engine requires an engine control unit (ECU) system that handles fast and precise signal processes for in-coming and out-going signals from fast running engines. In order to handle these roles, the sequential control has been adapted in the ECU system in small and medium size ship engines, which has caused high production cost and complexity of the system. Hence, this paper is focused on developing an distributed ECU system for high speed and high precision control of a marine engine by efficiently combining a CPLD chip and a microprocessor. By sharing load at the MCU with the designed CPLD chip, we could achieve in driving a marine engine with high speed and precise control so that the ECU board has been simplified and its production cost has been reduced.

Development of Knocking discrimination and Engine balance Correction Algorithm of CRDI Engine ECU (CRDI 엔진 전자제어컨트롤러(ECU)의 노킹 판별 및 엔진 밸런스 보정 알고리즘 개발)

  • Kim, Hwa-Seon;Jang, Seong-Jin;Jang, Jong-Yug
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2012.05a
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    • pp.391-394
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    • 2012
  • Recently, for appling to industrial engines to CRDI diesel engine to meet enhanced emission regulatory standards in native and foreign, ECU that be controlled only automaker develop engine control algorithm that adjust injection timing and injection as user's need and use testing, verification for engine performance and emissions reduction. For development only CRDI diesel engine emulator, using CKP and CMP sensor performance property of CRDI engine control ECU input element, in this paper, there determine the diesel knocking and propose design methodology of engine balance correction algorithm design of the correction algorithm. And there propose efficient Improvement for fuel efficiency increasing and reduction of emissions.

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Development of Engine ECU_ILS System for Diesel Engine of Commercial Vehicle (상용차용 디젤엔진의 Engine ECU_ILS 시스템 개발)

  • Ko, Youngjin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.5
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    • pp.35-43
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    • 2014
  • The automobile industry requires technological innovations to reduce fuel consumption with the public interest in environmental conservation in recent years. Thus, the hybrid system is applied not only to passenger cars but also commercial vehicles. The purpose of this paper is to develop engine ECU_ILS to develop commercial hybrid vehicles. In order to develop the engine and vehicle, the dynamometer and exhaust gas analyzer is needed. However, a lot of time and cost are required. In contrast, the model-based development environment that can be applied to a variety of test conditions can reduce development time. Therefore, a HILS system environment that can consider the behavior of actual vehicles for evaluation of the control logic, fuel consumption and exhaust gas is required. This engine ECU_ILS system was developed in this study, can analyze parameter such as the fuel injection rate, fuel injection time, fuel consumption and exhaust gas like the actual vehicle test using map data. Also, this system is expected to be able to analyze the characteristic of vehicle behavior and the development of peripheral device in relation to engine and vehicles. This HILS system can be used to develop control strategies of commercial hybrid vehicle systems in the future.

Degradation Characteristics of Eutectic and Pb-free Solder Joint of Electronics mounted for Automotive Engine (자동차 엔진룸용 전장품 유무연 솔더 접합부의 열화특성)

  • Kim, A Young;Hong, Won Sik
    • Journal of Welding and Joining
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    • v.32 no.3
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    • pp.74-80
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    • 2014
  • Due to environmental regulations (RoHS, WEEE and ELV) of the European Union, electronics and automotive electronics have to eliminate toxic substance from their devices and system. Especially, reliability issue of lead-free solder joint is increasing in car electronics due to ELV (End-of-Life Vehicle) banning from 2016. We have prepared engine control unit (ECU) modules soldered with Sn-40Pb and Sn-3.0Ag-0.5Cu (SAC305) solders, respectively. Degradation characteristics of solder joint strength were compared with various conditions of automobile environment such as cabin and engine room. Thermal cycle test (TC, $-40^{\circ}C$ ~ ($85^{\circ}C$ and $125^{\circ}C$), 1500 cycles) were conducted with automotive company standard. To compare shear strength degradation rate with eutectic and Pb-free solder alloy, we measured shear strength of chip components and its size from cabin and engine ECU modules. Based on the TC test results, finally, we have known the difference of degradation level with solder alloys and use environmental conditions. Solder joints degradation rate of engine room ECU is superior to cabin ECU due to large CTE (coefficient of thermal expansion) mismatch in field condition. Degradation rate of engine room ECU is 50~60% larger than cabin room electronics.

Study for Failure Cases on Engine Electronic Control Computer in Liquid Petroleum Gas vehicle (액화석유가스 자동차 엔진의 전자제어 컴퓨터의 고장사례 연구)

  • Lee, Il-Kwon;Kim, Young-Gyu;Kook, Chang-Ho
    • Journal of the Korean Institute of Gas
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    • v.15 no.6
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    • pp.28-33
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    • 2011
  • The purpose of this paper analyzes and studies to improve the failure cases on the computer that one of electronic control elements for engine in liquified petroleum gas vehicle. The first case, it certified the non-starting phenomenon of engine that it's electronic control unit didn't control the fuel for idle speed actuator because of no given action signal in slow-cut solenoid valve. The second case, it knew the bad condition phenomenon of engine and back-fire by the wire melting of ignition coil and firing of transistor being inside ECU. The third case, it certified the action stoping phenomenon of engine and malfunctioning signal for engine ECU because of leakage of current and an excess current by moisture inflowing inside ECU curcuit plate. Therefore, it is thought that will elevate the durability and reliability of engine computer throughout procure of quality.

Air-Fuel Ratio Control Characteristics of an LPG Engine at Idle (LPG 엔진의 공회전 영역에서 공연비 제어 특성)

  • 심한섭
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.8 no.5
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    • pp.30-35
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    • 1999
  • Since LPG has a higher octane number and a lower maximum combustion temperature than gasoline it is getting more popular for reducing emissions from the vehicle This paper when an LPG engine works in the range of idle analyzed the operating range preciously an provides reducing method of emissions for the LPG engine. An electronic control unit(ECU) for the LPG engine using a feedback mixer is presented. The ECU is built by using a microcontroller MC68HC05. A PI-controller is imple-mented in the ECU in order to handle to handle Air/Fuel ration control. The experimental results exhibit that the required engine performance are satisfied at idle.

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Precise Air-Fuel Ratio Control on Transient Conditions with the PC-ECU in SI Engine (PC-ECU를 이용한 SI 기관의 비정상상태 정밀공연비 제어)

  • Yoon, S.H.
    • Journal of ILASS-Korea
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    • v.5 no.3
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    • pp.9-16
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    • 2000
  • In a SI engine, three-way catalyst converter has the best efficiency when A/F ratio is near the stoichiometry. The feedback control using oxygen sensors in the commercial engine has limits caused by the system delays. So it is necessary to control fuel quantity in accordance with intake air amount in order to reduce exhaust emission and improve the specific fuel consumption. Precise A/F ratio control requires measurement of air amount with respect to the cylinder and injection fuel according to the air amount In this paper, we applied nonlinear fuel injection model and developed the algorithm of A/F ratio control. This algorithm includes the methods of measurement of transient air mass flowing into each cylinder, of calculation of injection pulse width for measured air mass, and the method of feedback and engine control by using lambda sensor. Also we developed control program for IBM-PC by using C++ Builder, and tested it in the commercial engine.

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A Study on the Characteristics of Dual Fuel Engine Fueled by Natural Gas and Diesel (천연가스-경유 혼소엔진의 특성연구)

  • Kim, Changup;Oh, Seungmook
    • Journal of the Korean Institute of Gas
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    • v.17 no.6
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    • pp.20-26
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    • 2013
  • In this study, based on a 12L class diesel engine, a natural gas-diesel dual fuel engine was developed by adding natural gas fuel supply system. For optimal control of dual fuel engine, a conventional diesel engine ECU and a dual fuel ECU were utilized. To convert the dual fuel engine, MPI natural gas injectors were installed on the new modified intake manifold adapter. As a results, the dual fuel engine showed same level of torque, power performance and exhaust gas emissions as those of a diesel base engine.. Furthermore, overall fuel replacement rate was 70~76 % and total fuel cost saving was 37~40%.