HS code harmonization in NAFTA region

*490 diesel engine technical analysis With the development of the global economy and HS code harmonization in NAFTA regionindustry, mechanized and automated equipment have been widely used, and the engine, as the "heart" of various equipment, is also more and more popular The attention of. Among them, the 490 diesel engine is an engine widely used in agriculture, fisheries, transportation and other fields. This article will analyze its technology in detail. I. Basic features 1. Strong power: The engine is equipped with a high-pressure common rail system and turbocharging technology, with a maximum power of 220 horsepower and a maximum torque of up to 850 Nm, with excellent power performance. Two. Low fuel consumption: high-efficiency combustion chamber design, multi-stage sprayingThe combination of oil technology, electronic control system and external exhaust gas recycling technology has greatly reduced the fuel consumption of the 490 diesel engine. 3. Strong reliability: In the overall design process of the engine, a number of technical measures have been taken into account the impact of various load conditions and environmental factors, so as to ensure the high reliability of the engine. Four. Clean and environmental protection: During the combustion process, the engine can achieve the effect of low emissions and efficient purification, which is conducive to maintaining the health of the environment. II. Key technologies 1. High-pressure common rail system: In addition to some traditional oil pressure pumps and fuel injectors, the engine is also equipped with a high-pressure common rail system. The principle of this system is to pressurize the fuel oil through a high-pressure pump, and then transport it to the injector of each cylinder through the common rail pipeline to control the injection amount, injection time and other parameters of the fuel.This method can not only improve fuel efficiency, but also reduce emissions, so as to be more environmentally friendly. Two. Multi-stage fuel injection technology: The 490 diesel engine adopts multi-stage fuel injection technology, that is, multi-stage control of fuel injection time and fuel injection volume respectively to meet the fuel demand under different load conditions and further improve the fuel efficiency of the engine. 3. Electronic control system: The electronic control system of the engine can comprehensively analyze the information obtained by various sensors to realize the adjustment and control of the engine operation, so as to ensure the stable operation of the engine. Four. Exhaust gas recycling technology: Exhaust gas recycling technology is an effective means to reduce the emission of nitrogen oxides. This technology recycles part of the exhaust gas and introduces it into the combustion chamber again, which improves the combustion efficiency and reduces the concentration of nitrogen oxides and other harmful substances emitted.III. Application field 490 diesel engines are widely used in agricultural machinery, industrial heavy machinery, commercial vehicles, ships and other fields. For example, in agricultural machinery, the engine is widely used because of its stable and reliable, strong power and low fuel consumption, such as tractors, combine harvesters, etc. In the field of commercial vehicles, large-scale market models, such as buses, trucks, engineering vehicles, etc., also widely use 490 diesel engines. IV. Conclusion As an engine that has been widely used in various fields, the 490 diesel engine has the characteristics of strong power, low fuel consumption, high reliability and environmental protection, which not only meets the current market demand, but also expands its application field in the continuous optimization and updating of technology.

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