| The technology of diesel engine's electronic control which can effectively reduce the diesel exhaust is one of the most important directions in the development of diesel technology. With the increasingly intensified limitation of exhaust regulations, the reduction on fuel consumption and the control of the particulate exhaust are the two important problems which are need to be resolved as soon as possible. An all-round study on the control of diesel particulate was conducted in order to meet the need of environment protection.The core method of internal cleaning was taken by improving the diesel design, combined with exhaust's aftertreatment, to study on the diesel particulate control. The main methods of reducing CA498ZL diesel engine's particulate generation include ejecting technology of electronically controlled fuel distributing (such as the optimizing design of the cam's profile of fuel injection pump, diameter of the column piston and the fuel ejecting pressure, the selecting of the delivery valve style, the decreasing of the swirl ratio, and the optimizing of the injector and combustion chamber, etc.) and VNT technology. The experimental study on Diesel Oxidation Catalyst was also conducted for particulate aftertreatment. Furthermore, the consumption of lubricating oil was reduced and the design of piston ring and piston ring slot was optimized. At the same time, the fundamental research on the software and the hardware system of the diesel electronic control was also conducted.The synthetic matching of the distributing fuel injection system, VNT/EGR system and the Diesel Oxidation Catalyst was done on CA498ZL diesel engine to satisfy EURO3 standard and at the same time reduce particulate exhaust. The main experimental work includes:1) Improving the design of CA498ZL diesel engine's piston and piston ring, fabricating the piston discreteness and testing the lubricating oil consumption by using AVL403 testing instrument.2) Matching the Diesel Oxidation Catalyst with CA498ZL diesel engine. Investigating the effect of aftertreatment system on exhaust smoke and accelerating smoke by the experiment of aftertreatment.3) Matching the VNT supercharger with CA498ZL diesel engine to investigate the effect of VNT vane's position at different operating conditions on engine's performance and exhaust. The optimization of torque at lower speed, fuel economy, exhaust smoke and accelerating smoke was conducted to acquire the optimal positions at different operating conditions from which the VNT map can be acquired. The result was compared with the original engine's particulate exhaust.4) Conducting the matching experiment of the electronically controlled pump according to the typical operating conditions. The electronic control map was determined in the computer system in accordance with the study on the effect of fuel providing and fuel providing time on engine's performance and exhaust. The result was also compared with the original engine's particulate exhaust.5) Matching of VNT and the distributing ejection system. At the premise of keeping engine's power output, the effect of VNT's close and dynamically advanced angle on engine's smoke exhaust was investigated and the VNT and advanced angle maps were modified.6) Synthetic matching of VNT, electronically controlled pump and the aftertreatment system and investigating of the variation of the particulate exhaust at 13 operating conditions. The map of the advanced angle of the electronic control was modified again.7) Testing whether or not the CA498ZL diesel engine's exhaust satisfies the EURO3 standard after the total matching of VNT, EGR, electronic control pump and the aftertreatment system.The following conclusions can be drawn according to experimental analysis:1) The ratio of the consumption of the lubricating oil and that of the fuel can be controlled less than 1‰ by redesigning the piston discreteness.2) The Diesel Oxidation Catalyst can oxidize the SOF component of the particulate.3) The technology of VNT can great...
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