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N20 engine introduction and DigiPlustechnical analysis N20 engine is a turbocharged gasoline engine launched by BMW, which is mainly used in BMW 3 series, 5 series, X1, Z4 and other models. Will beThe engine adopts a large number of advanced technologies, such as efficient turbocharging system, fuel injection system, valve control system, etc., which makes the engine have excellent dynamic, economy and environmental protection performance. This article will introduce the technical characteristics and performance advantages of the N20 engine in detail. I. The basic parameters N20 engine adopts an in-line four-cylinder design, with a cylinder diameter and stroke of 84mm×90mm respectively, and a displacement of 2.0 liters. It can provide a maximum output power of 180kW and a maximum torque of 350N·m through turbocharging technology, achieving a perfect balance of high performance and high economy. II. High-efficiency turbocharging system The N20 engine adopts a dual-turbocharging system. One of the turbochargers is responsible for supercharging at low speed, and the other turbocharger is responsible for supercharging at high speed. This kind of double vortexThe wheel supercharging design enables the engine to maintain high supercharging pressure at different speeds and reduce turbine lag, which significantly improves power output efficiency and fuel economy. III. High-efficiency fuel injection system The N20 engine adopts a high-pressure direct fuel injection system and a Piezo electronically controlled fuel injector, so that the fuel injection can be accurately controlled to achieve higher fuel injection efficiency. Its fuel injection pressure is as high as 200bar, and the fuel injector can complete the injection of fuel in 0.1 milliseconds, making the combustion more adequate and the fuel economy performance is significantly improved. IV. Precision valve control system N20 engine adopts Valvetronic valve control system, and most of the models are also equipped with dual VANOS variable valve timing system. This kind of valve control system can achieve more accurate valve control.Let the engine have the best valve opening and timing under different loads and speeds, so as to achieve the best power, economy and environmental protection performance. V. Power and fuel economy. The N20 engine performs well in terms of power. The BMW 320i and 328i models can output a maximum power output of 135kW/270N·m and 180kW/350N·m respectively. At the same time, the engine is also excellent in terms of fuel economy performance. The comprehensive fuel consumption of the BMW 320i model is only 6.2L/100km, and the CO2 emission is 143g/km, which has excellent environmental protection performance. VI. Conclusion In general, the N20 engine is a highly technical turbocharged gasoline engine, with high-efficiency turbocharging system, high-efficiency fuel injection system, fineAdvanced technologies such as tight valve control system can achieve a perfect balance in terms of power, economy and environmental protection.

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