Advocating low-pollution diesel engine technology is also "frontier"

Diesel engines that were once considered to be low-tech have now become "technologically rich mines" in the field of internal combustion engines.

In recent years, the global automotive industry has been eagerly seeking solutions for fuel-efficient and alternative energy sources, and the understanding has gradually converged, namely, “three steps”: the recent promotion of diesel and non-oil products such as natural gas and ethanol; , Hybrid power; long-term, resource-rich, zero pollution hydrogen-powered fuel cells. Among them, diesel engines are becoming an international new trend with their economy, durability and excellent dynamics.

In Europe, the market share of diesel vehicles has reached more than 50%. Diesel vehicles are regarded as high-efficiency, energy-saving and environmentally-friendly products. However, in China, people's impression of diesel engines still remains black smoke, noise, and low power. Stage. The reason is that people's impression of diesel engines mostly comes from low-end agricultural diesel engines, and little is known about the new clean diesel engines carried on cars.

In fact, after more than 10 years of development, the performance of diesel engines has been a qualitative leap, especially the application of many advanced technologies, and the emission, noise, and power performance of diesel engines have been improved to a level equivalent to that of gasoline engines while retaining the diesel engine. High torque, low fuel consumption, low failure rate and other advantages.

At present, most of the world's mainstream clean-type passenger diesel engines are equipped with Bosch Electronically Controlled High-Pressure Common Rail Fuel Injection Technology (CRé„„DI). The precise control of fuel injection pressure, injection quantity, and injection timing is easily achieved. The combustion is more complete and the process is more complete. Soft, fundamentally improves the combustion quality of fuel, reduces the generation of soot, overcomes the rough noise and vibration generated by traditional diesel engines, and leads to lower fuel consumption through efficient combustion.

Modern clean diesel engines are also equipped with variable section turbocharging technology. Variable section technology enables the engine to continuously change the blade angle of the supercharger according to different working conditions, solving the problem of turbo lag of the traditional supercharging method, and ensuring the engine Smooth pressurization even at low speeds, resulting in a powerful power experience over the entire operating range.

Intercooled exhaust gas recirculation technology (EGR) is another important technology that modern clean diesel engines carry. By introducing part of the exhaust gas cooled by the intercooler into the combustion chamber, the emission of nitrogen oxides can be effectively reduced, and the vibration and noise caused by knocking can be reduced.

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