EGR technology features:
      Its fuel injection system is similar to that of the State II mechanical injection pump . The fault diagnosis system has complete functions, simple operation , greatly reduced operating costs , and good adaptability of oil products. At present, the national general-purpose diesel can be applied , which is suitable for national conditions. The EGR engine is easy to maintain and maintain, reduces maintenance waiting time , and has lower maintenance costs. Disadvantages: Emission standards cannot be guaranteed after long-term use.
      Recommendations: The EGR engine technology is already very mature in China, but it is not possible to apply for household registration procedures in areas with high exhaust gas emission standards in municipalities, big cities, and some provincial capital cities. Small and medium-sized cities, towns, and rural areas need not worry. SMEs and individuals who meet the requirements of the above households and who have a low budget for car purchase are advised to purchase.
Electronically controlled monomer pump technology features:
      The electronically controlled monomer pump system is currently widely used in Europe. The electronically controlled monomer pump technology plus mechanical injectors can meet Euro III emission standards. It can be easily upgraded from Euro III without massive modifications to the structure of the engine. Euro IV : Its fuel injection law is slow and urgent first, meets the requirements of ideal heat release law, which is conducive to reducing emissions and combustion noise; strong oil supply capability, can be independently controlled by each cylinder, especially suitable for heavy-duty diesel engines with large power; system zero The components are maturer than the common rail system and have a long service life; the maintenance cost is low: single-cylinder components can be replaced, and the cost of the mechanical injector is lower than that of the electronically controlled injector.   Disadvantages: The technology tends to mature, but the market penetration rate is less than EGR .
      Recommendations: Customers who have high requirements for engine emission standards and those who are worried that subsequent policy adjustments need to be upgraded may consider purchasing.
The characteristics of electronically controlled high pressure common rail technology:
      Electronically controlled common rail technology is simple in structure and easy to install. The common rail oil pressure is independent of the engine speed control, and the vehicle control function is strong enough to meet the requirements of light vehicles. Its pre-injection technology can reduce the idle noise; the common rail system has good flexibility, but it is bound to bring difficulties in matching work; Euro IV , Euro V emission regulations potential;
   Disadvantages: For light vehicles, the system components are mature and verified by long-term use; medium-sized vehicles are more mature; however, the service life of heavy-duty diesel engines has not been verified. Does not meet the diesel engine combustion needs the first emergency law, is not conducive to emission control; fuel consumption than the single pump has disadvantages; fuel (water, ash impurities) poor adaptability, high requirements for user use conditions, especially The complex control system and control strategy has brought challenges to vehicle manufacturers, users, and after-sales maintenance. The replacement cost of parts and components is high, especially for electronically controlled fuel injectors and electronically controlled fuel injection pumps.
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