Diesel Generator Sets High Pressure Common Rail Engines And EGR Engines

Let's talk about the advantages and disadvantages of high-pressure common rail engines and EGR engines for diesel generator sets today.

The working principle of the diesel generator set's electronically controlled high-pressure common rail engine: also known as the electronic injection engine, it relies on an ECU chip to control the injector for accurate fuel injection, so as to optimize diesel combustion and improve combustion efficiency. Due to sufficient combustion, there are fewer particulate matter in the exhaust gas, and the amount of NOx generated is reduced.

The working principle of the diesel generator set's EGR engine: EGR stands for Exhaust Gas Recirculation. The EGR engine refers to the exhaust gas recirculation system. It is an exhaust gas purification device designed to target nitrogen oxides (NOx), one of the harmful gases in engine exhaust.

After analyzing the working principles of high-pressure common rail engines and EGR engines, let's analyze their respective advantages:

Product price comparison: Taking Weichai engines as an example, under the same horsepower, high-pressure common rail engines are nearly ten thousand yuan more expensive than EGR engines.

Maintenance cost comparison: High-pressure common rail engines have high accessory costs and high maintenance costs; EGR engines have low failure rates and low maintenance costs.

Fuel efficiency aspect: EGR engines have higher fuel consumption than common rail engines. The high-pressure common rail engine can be said to be a qualitative leap. It uses digital technology to achieve precise fuel injection, unlike traditional mechanical ones which are relatively rough. However, the cost of the electronic injection system is relatively high (the most widely used in China is the Bosch common rail system), and it has higher requirements for engine oil and filters.

The disadvantage of the electronically controlled high-pressure common rail engine: It is undeniable that high-pressure common rail diesel engines are indeed the development direction of future power units. However, this "high-tech heart" is closely related to the quality of diesel fuel. The fuel pump of the high-pressure common rail can withstand quite high pressure, and the more advanced the common rail diesel engine, the more sensitive it is to fuel quality. If you add a tank of diesel with poor quality or water accumulation problems, your engine is likely to "strike".

High-pressure common rail engines have technical advantages over EGR engines, but are at a disadvantage in terms of purchase price and maintenance costs. Whether the engine adopts a high-pressure common rail engine or an EGR engine, both are designed to meet the National III emission standards, reduce air pollution, and make our common home more environmentally friendly.

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