School of Engineering
Engine Management System
Contents Page
1. Introduction……………………………………………………..Page 3
2. Objectives…………………………………………………….Page 3-4
3. Engine Definition……………………………………………….Page 4
4. Technologies Required to Control Emissions……………..Pages 5-6
5. Specification of the EMS……………………………....……Pages 7-9
6. Operation of the EMS………………………………….….Page 10-13
7. Calibration of the EMS…………………………………...…..Page 14
8. Discussion & Conclusion ………………………...………...…Page 14
9. References…………………………………………….…..……Page 15
Appendixes
[pic]
1. Introduction
Engine management is a general way to describe an electronically controlled engine system. These systems are designed to make the vehicles to be agreed with the emissions regulations, good fuel economy and provide improved performance. Common use of ECU’s is to control the quantity of fuel injected into each engine cycle, but nowadays ECU’s control the Ignition Timing, Variable Cam Timing, boost level (in turbocharged cars) and many other parameters, using information received in form of voltage signals from various sensors and actuators as it is adjusted to electronic memory.
Analogue input signals are fed from the sensors to the control unit where they are converted into digital signals from the microprocessor. Control unit software is designed to decode all the real-time data that are collected at the same time from low rpm up to maximum engine speed.
[pic]
2. Objectives
The objectives of the coursework are:
i) To specify the technologies that required to allow an engine to achieve satisfactory control of NO and Particulates from the range available such as EGR, catalytic converters and include the technologies and operational parameters to allow rapid control of emissions from cold start.
ii) Describe and explain the information needed by the EMS to enable the EMS in order to control the engine.
iii) Explain the operation of EMS for: cold starts, idle...