Mounting Magnets,Round Base Magnets,Rotatable Hook Magnet,Rare Earth Mounting Magnets Anfeng Industrial Co.,Ltd , https://www.afmagnets.com
Yuchai YC6L Heavy Machinery Environmental Protection New Mark
With a mission of "dedicating to clean energy and building a harmonious environment," Yuchai has achieved significant breakthroughs in technological innovation, continuously introducing advanced products. Among these, the Yuchai Heavy Machinery YC6L engine stands out as a prime example of its progress in performance and emissions control.
In 2002, Yuchai conducted the first road test of China's four-valve heavy-duty diesel engine, the YC6L. By the end of that year, it partnered with Dongfeng Liuzhou Automobile and Shaanxi Heavy Duty Truck to develop a prototype vehicle supporting the YC6L. In 2003, the YC6L-powered truck was quietly introduced to the market, marking a milestone in Chinese diesel engine development.
The four-valve technology improved engine efficiency by increasing the valve cross-section by approximately 15%, reducing intake and exhaust resistance while boosting air intake. This also allowed for vertical placement of the fuel injector, improving the mixture of air and fuel in the combustion chamber. These enhancements led to lower fuel consumption and reduced emissions.
One of the biggest challenges in implementing this technology was manufacturing the cylinder head. In 2000, Yuchai’s experienced die design and foundry teams pioneered the production of four-valve diesel engine cylinder heads in China, setting a new standard.
As a high-performance engine based on 21st-century global diesel technology, the YC6L Euro II model offers power outputs between 206 to 257 kW (280 to 350 PS), suitable for buses ranging from 10 to 13.7 meters and heavy trucks up to 15 tons. It features FEV-specific combustion systems, P7100 injection pumps, wet cylinder liners, and European cooled pistons, ensuring efficient cooling and low noise levels. The patented gear meshing technology further reduces engine noise, while strict adherence to FEV mechanical development procedures ensures reliability and a long service life of up to 250,000 km or 20 months.
In 2003, while most domestic engines were still at Euro I standards, Yuchai had already completed Euro II compliance. The timely launch of the four-valve Euro II YC6L demonstrated not only Yuchai’s technical strength but also its commitment to environmental responsibility. That same year, Yuchai also launched the first domestically produced engine meeting Euro III standards—three years ahead of its competitors. This success helped expand the YC6L into the passenger car market.
As emission regulations became stricter, technologies such as electronic fuel injection, optimized combustion, and improved fuel quality became essential for achieving Euro II to Euro III upgrades. The Euro III YC6L, developed in collaboration with German company FEV, incorporated advanced features like the Delphi electronic control unit pump, a maximum injection pressure of 1800 bar, and a seven-hole nozzle for better combustion. It could operate smoothly in extreme temperatures (-40°C to 50°C) and altitudes up to 4000 meters. Additional benefits included automatic fault diagnosis, intelligent power control, and idle load management.
The Euro III engine was tailored for China’s specific conditions, proving highly reliable under domestic road and fuel conditions, with minimal issues and significant user benefits.
In 2004, Yuchai initiated the Euro IV project, driven by a strong sense of social responsibility amid rapid growth in the automotive industry. In 2005, Yuchai engineers proposed the SCR (Selective Catalytic Reduction) after-treatment technology for heavy-duty diesel engines, which later gained widespread acceptance in China. By 2006, Yuchai’s YC6L equipped with a domestic SCR controller successfully passed Euro IV emission tests at the National Center for Automotive Quality Supervision and Inspection in Tianjin, becoming the first domestically developed Euro IV diesel engine to be approved by both the National Automobile Inspection Center and the Environmental Protection Agency.
With Beijing’s full implementation of Euro III standards, major tourism companies upgraded their fleets to Euro III vehicles. For instance, Beijing CYTS used 35 Neoplan coaches powered by YC6L Euro III engines, which offered excellent acceleration, significantly lower noise levels, and 3-5 liters per 100 km less fuel consumption compared to imported models.
In 2006, Beijing Shouqi Co., Ltd. ordered 30 gold-class passenger cars equipped with YC6L Euro III engines for the “two sessions†event. These vehicles performed flawlessly. The upcoming YC6L Euro IV engine was tested extensively with homemade diesel and domestically produced urea, optimized specifically for urban public transport in China.
Yuchai's continuous innovation and commitment to clean energy have earned it recognition, including the "China Brand Annual Award NO.1" in the internal combustion engine category in 2007.