With the development of society and the improvement of technology, people are concerned about the environment more and more, the protection of environment has been on a schedule. In recent year, the amount of automobile increases every year, which results in environment pollution, so to limit the exhaust emission becomes the first concern of the automobile development. Lately, electronic control of engine has been a trend of emission reducing. Though the technology of the electronic controlled gasoline engine is very mature, the technology of the electronic controlled diesel engine still need to be improved, especially for the emission of PM and NOx. Development of Diesel engine electronic controlled system began in the middle of 1980s after gasoline engine electronic controlled technology was mature, which was divided into position control, time control, and pressure-time control according to the control mode. The characteristic of the position control reserved not only the traditional pump-pipe-nozzle system but also the rack or collar which was fuel quantity driving mechanism, the difference was only that the electronic controlled displacement actuator replaced the machine fuel quantity adjusting shank, then the position of the adjusting shank was measured by the position sensor, so the fuel quantity adjusting was actualized. With the angle displacement actuator or the high-speed electromagnetic valve, the position of camshaft versus crankshaft could be changed at the same time, the angle change was measured by angle sensor, in this way the injection timing control was realized. The structure of diesel engine nearly did not need to be rectified, so it was convenient to reconstruct the engine in existence. Some developed country abroad set up emission regulation earlier than our country, so the emission regulation in our country lagged behind relatively. After entering WTO, automobile enterprise of China would face more pressure with automobile tariff . Facing the large consumption market, our enterprises have to compete with the foreign enterprise. Our diesel type was too much, which came from different countries, so on the base of this, the electronic control technology will not be the same one. For a long consideration, several systems suiting for our country should be selected to be researched and studied. Adoption of position electronic control of VE distributor pump will do less modification on original fuel-injection system and will shorten the exploiting period, in the same time it satisfies the request of low emission and fuel consumption. So it is comparatively <WP=82>suited to our domestic conditions. VP37 electronic controlled pump had been applied for many years, whose reliability was well and pressure in side of pump was high, control system was simple relatively, so many native enterprises took the homemade production of VP37 as the cut-in point of diesel electronic control. In this way we can not only exploit electronic controlled diesel engine in a short time for satisfying emission regulation but also shorten the gap with the developed country in the field of new technology. In this thesis, the main research direction is the calibration and matching of VP37 electronic controlled fuel distribution pump with CA498Z diesel engine and combined with EGR、VNT, experiment to reach the emission regulation is carried out. VP37 electronic controlled fuel distribution pump was made in BOSCH company, which belonged to position control mode. Compared with machine VE pump, it mainly controlled fuel quantity and injection timing by electronic controlled system and replaced the complex timing mechanism by electromagnetic iron collar electronic controlled mechanism. In the high pressure fuel chamber a high-speed electromagnetic valve adjusted the delivering fuel angle dynamically. It preserved the basic structure of original machine VE pump, for example, pulsant delivering fuel theory. CA498Z engine was a mature production of Dalian diesel engine works of FAW, but what it matched was in-line
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