如鱼得水近义词Design of Electronic Control Unit (ECU)
感受自然for Automobiles - Electronic Engine Management system
M. Tech. Project first stage report (EE 696)
(Design Requirements, analysis and Propod ideas
for design of Electronic Engine Management ECU)
by
Vineet P. Aras
(Roll No. 03307411)
under the guidance of
Prof. Kavi Arya
Prof. Dinesh Sharma
Department of Electrical Engineering
Indian Institute of Technology Bombay
July 2004
Acknowledgement
I express my gratitude to my guides, Prof. Kavi Arya and Prof. Dinesh Sharma, for their invaluable help, guidance and motivation, which effectively contributed in successful completion of the first stage of this project. The regular meetings and discussions with Prof. Kavi Arya helped a lot in carrying out a focud work. They were instrumental in providing technical, moral and administrative support. It is a privilege to work under their guidance. I also thank other professors including Prof Shashikanth Suryanarayanan, for their cooperation extended.
Abstract
This report prents a detailed explanation of the Design requirements of Electronic control Unit (ECU) for Engine Management. Due to the regulations demanding lower emissions, together with the need for better performance, fuel economy, continuous diagnosis, Electronic systems form an inevitable part of Engine management. A systems design approach has been ud to break down the whole Engine management into three main categories, namely Electronic Charging, Alternator, and Engine starting system; Electronic Ignition system; Electronic Fuel system. Design requirements of each of the ctions of engine management are explained thoroughly. The electronic starter is ud to start the engine. Once started, appropriate air-fuel mixture quantity is injected into the cylinder through proper electronic control, which depend on various factors like engine speed, load, temperature, battery voltage, throttle position. Additionally, the electronic ignition system should provide the spark to ignite the air-fuel vapour with proper timing depending on speed, load, temperature etc. Moreover, the exhaust emissions should be kept at check and the fuel consumption should be minimum. Through out the report a designer’s approach has been ud by proposing lf designed circuits, block diagrams and flowcharts, which would form the basis for design. Towards the end of the report, the actual design process of the ECU is started by designing the Input / Output circuit for Electronic Engine Management, which would be the basis for designing the actual electronic system in the next stages of this project.
CONTENTS
1 INTRODUCTION 6 1.1 Electronic Systems Design approach (6)
2 ELECTRONIC CHARGING, ALTERNATOR AND
烫发伤头发吗ENGINE STARTING SYSTEM 9 2.1 Battery (9)
2.2 Electronic Charging circuit and system (9)
2.3 Electronic Engine Starting circuit and system (11)
3 ELECTRONIC IGNITION SYSTEM’S DESIGN REQUIREMENTS 15 3.1 Basic terms and types of Ignition systems (15)
3.2Propod Block diagram and Design requirements of
Electronically programmed and distributed ignition system (17)
3.2.1 Ignition switch (18)
3.2.2 Ignition or Spark generation - Inductive / Capacitor Discharge type (18)
3.2.3 Electronic Voltage Regulator (19)
3.2.4 Pul Generator – Crankshaft / Hall effect / optical type (19)
3.2.5 Pul Shaping circuit (20)
3.2.6Electronic Dwell control - Constant / Open loop /
有效学习方法Constant Energy clod loop type (20)
3.2.7Electronics Spark Advance (ESA) timing control- speed, load,
temperature, knock, idle, pha, anti-jerk and warm-up conditions (22)
3.2.8 Analog and Digital Electronics Hardware and Propod Flow Chart (24)
3.2.9 Driving and output Switching (26)
3.2.10 Electronic Distribution - Distributorless / Direct Ignition type (26)
3.2.11 Spark Plug and High Voltage cables (27)
4 ELECTRONIC FUEL SYSTEM’S DESIGN REQUIREMENTS28 4.1 Air-fuel mixture and Exhaust Emissions (28)
4.2 Electronic fuel system’s Design requirements (29)
4.2.1 Main relay operation (30)
4.2.2 Air mass flow measurement – Flap / Hot wire type (30)犹豫的反义词是什么
4.2.3 Engine speed measurement – Idle, Overrun and Overspeed conditions (30)
4.2.4 Temperature Measurements – Engine, Fuel (Hot start) and Air (31)
4.2.5 Throttle position measurement –
Idle, Accelerate, Decelerate and Full load conditions (32)
4.2.6Exhaust gas oxygen (EGO) measurement –
Clod loop Lambda control and Catalytic converter (33)
4.2.7 Battery Voltage correction (34)
4.2.8 Idle or fast idle control – idle air control motor actuator (34)
4.2.9 Exhaust gas recirculation (EGR) (34)
4.2.10 Fuel supply – tank, pump, pressure regulator and tank emissions (35)
4.2.11 Fuel Injection – Simultaneous / Sequential /
Gasoline Direct Injection (GDI) (36)
4.2.12 Calculation of basic Injection time - Air flow / Speed - density method..40
4.2.13 Propod Electronic Fuel Injection system Flow Chart (40)
4.2.14 Other fuel injections – DMI / Diel / alternative fuels (42)
5 ELECTRONIC ENGINE MANAGEMENT ECU WITH
会议文案
ON-BOARD DIAGNOSTICS - DESIGN PROCESS STARTED 43 5.1 Propod ‘Engine Management ECU’s’ Input / Output circuit diagram (43)
5.2 On – Board Diagnostics (OBD) (45)
5.3 Designed and tested EGO Lambda Control ADC circuit module (46)
儿童流鼻血的原因6 CONCLUSIONS AND WORK AHEAD (48)
REFERENCES (50)
焦糖核桃
