On December 28th, Guangxi Yuchai Machinery Group Co., Ltd. YC6J350-40 and YC4FA185-40 two two-stage turbocharged low-carbon energy efficient engines were successfully commissioned. This is the first time that China has developed a diesel engine with a power exceeding 40kW/L. It is also the first time that a two-stage supercharged diesel engine is put into trial operation in China.
These two low-carbon, energy-saving, high-efficiency engines were jointly developed by Yuchai Group and Tianjin University and are the results of the organic combination of Yuchai’s proprietary technology in product design, combustion systems, electronic control systems, and powertrain matching. Realize small batch production.
According to reports, the technical achievements include three technical advantages: First, low-carbon emissions. The two models have power ratings of 40kW/L and 45.3kW/L, respectively, which means that the 6.5-liter displacement of the YC6J has reached the power level of an ordinary 8.4-liter diesel engine, while the 3-liter displacement of the YC4FA has reached the average 4.5-liter diesel engine. Power level. For example, when it invests in actual road transport, it will reduce carbon dioxide emissions by at least 5 tons per year per year, and at least 5,000 tons of carbon dioxide emissions will be reduced per 1,000 vehicles.
The second is energy saving. The fuel consumption of the two models is reduced by 5% compared to vehicles with large displacement engines of the same model; the emission levels meet the requirements of the national 4 and national 5 emission standards; the boost pressure ratio reaches 3, that is, the intake pressure is increased to the equivalent of 3 Atmospheric pressure level (normal diesel engine is only equivalent to 2 atmospheric pressure levels), so that the engine, low-speed torque increased by 30%, improving the vehicle's power.
The third is to realize the miniaturization of engine applications and make the vehicle lighter in weight. For example, the total weight of the YC4FA185-40 is 100kg lower than that of an ordinary 4.5-litre diesel engine of the same power, so that the frictional power consumed by the moving parts is smaller, the mechanical efficiency is higher, and the entire vehicle can run more efficiently.
Professor Ren Jingfa, director of the National Internal Combustion Engine Key Laboratory at Tianjin University, said that the trial operation of low-carbon, energy-efficient, and high-efficiency engines has enabled Yuchai to become a leading domestic engine for miniaturization and integrated development, and it has become China’s first two-stage supercharger. The diesel engine loading operation trial enterprise.
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