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Pressure Control of the High-Pressure Common-Rail Electronic Control System Based on HCS12

Author: HuHe
Tutor: LvCaiQin；WangXiao
School: University of North
Course: Mechanical engineering
Keywords: Diesel engine Electronic control unit Rail pressure control strategy HCS12
CLC: TK423
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 0
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Abstract


With the increasing depletion of conventional energy sources and increasingly stringent emissions regulations , forcing diesel engine moving in the direction of low pollution , low fuel consumption and high power , high pressure common rail fuel injection system, fuel injection system as a high flexibility , its significant superiority , has become one of the trends of the development of modern cars with diesel engine technology . The research key electronically controlled injection system hardware and software design techniques , the technological progress of China 's automotive industry and R \u0026 D capabilities , have very great practical significance . Through analysis of system structure and control principle of high pressure common rail , rail pressure control strategies research study , and a preliminary study on the ECU development involves the hardware and software -based control strategy . The precise control of the common rail pressure are many vacant area of ??optimal control of a premise , starting requirements quickly build rail pressure , after starting to adapt to changes in working conditions , and maintain the stability of the rail pressure . Functional requirements for electronic control unit , the completion of the core hardware to MC9S12DP258B microcontroller circuit schematic and PCB design , schematic diagram of the various parts of the composition and characteristics of the chip . According to the hierarchical design and modular thinking , the electronic control system software development , mainly for initialization module , signal acquisition module , logic control module , the drive control module , serial communication module and monitoring module , including six development by the function module . Completion of each module in the electronic control system that is relatively independent but interrelated relationship , able to achieve control of the electronic control system tasks . Finally, the experimental test program for the entire electronic control unit . Experimental results show that the system hardware test bench and reliable operation , the software system can achieve the entire system control functions .

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CLC: > Industrial Technology > Energy and Power Engineering > Internal combustion engine > Diesel engine > Structure
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