Oil price Gaoyuchai four-valve engine highlights leading edge

"Oil prices have risen again. Starting from midnight on May 24th, the price of domestic refined oil was increased once more. Gasoline, diesel, and aviation kerosene saw a rise of 500 yuan per ton. This marks the first adjustment in refined oil prices since March 26, and it's also the second time this year, with the largest increase in oil prices to date. The retail price has gone up by more than 4 cents. Recently, international oil prices have surged again, fluctuating around $70 per barrel. Experts predict that oil prices will remain high throughout the year. As the automotive industry, especially the engine sector, is closely tied to refined oil, what are their views on rising oil prices? To explore this, the reporter interviewed Yuchai Machinery Co., Ltd., a leading Chinese diesel engine manufacturer. According to Yuchai’s technical experts, in recent years, the company has been committed to "dedication to clean power and creating a harmonious environment," making continuous efforts in energy conservation and environmental protection. This sense of responsibility has driven Yuchai to achieve major breakthroughs in technological innovation, introducing various energy-efficient and eco-friendly products. Among these innovations, the four-valve technology has significantly reduced energy consumption. Industry experts explain that reducing intake and exhaust resistance and properly matching the fuel injection nozzle with the combustion chamber can effectively lower engine energy use. The four-valve technology further increases the flow area of intake and exhaust for the same bore size, reducing resistance and improving air intake capacity. It also enhances the matching between the nozzle and combustion chamber, allowing better fuel atomization and more complete combustion. As a result, the four-valve technology is an effective way to save energy and is widely used in developed countries. For domestic heavy trucks to gain a larger market share globally, adopting four-valve engines is essential. Additionally, the central government encourages the building of an energy-saving society. Although four-valve engines are not yet mandatory, future regulations may require them. Yuchai has been developing its four-valve engine technology for several years, though it remained relatively low-key. In 2002, Yuchai conducted the first test of the YC6L four-valve engine. By the end of 2002, Dongfeng Liuzhou Automobile and Shaanxi Zhongqi also developed prototypes of the YC6L four-valve engine. In 2003, the YC6L heavy truck quietly entered the market, while the YC6M four-valve engine continued to be developed. Yuchai adopted a two-step strategy, using the 6M two-valve engine as a stepping stone before introducing the four-valve version. The advantages of the 6M two-valve engine were well received by users, and with rising oil prices, Yuchai introduced the four-valve version in the second half of 2005. On February 26 this year, China’s first YC6L four-valve engine meeting Euro IV standards was launched at Yuchai, reflecting the company’s strategic vision of “new Yuchai, new thinking, and new development.” On April 13, JAC held a heavy truck delivery ceremony in Shenzhen, supporting the Yuchai 6M four-valve engine. This event, held during Deng Xiaoping’s “Southern Tour,” caused a significant impact in the industry, signaling the beginning of Yuchai’s “Spring Story” and marking a new era in China’s internal combustion engine industry. Soon after May 18, the Yuchai 6M four-valve engine made a strong appearance at the Dongfeng Tianlong launch, becoming the center of attention. The Yuchai four-valve heavy-duty engines currently on the market include two series: YC6L and YC6M. The YC6L offers power ranging from 280 to 350 horsepower, suitable for 10-13.7-meter passenger cars and 10-15-ton heavy trucks, meeting Euro II, III, and IV emission standards. The YC6M provides 320-390 horsepower, fitting vehicles over 12 meters and heavy trucks over 15 tons, complying with Euro II and III requirements. Both series are high-grade heavy-duty engines based on advanced 21st-century diesel engine technologies. They feature the German FEV-specific combustion system, ensuring efficient combustion; the Euro II model uses the P7100 fuel injection pump for better atomization; wet cylinder liners and European forced cooling piston technology ensure superior cooling performance; patented dot-line meshing gear technology reduces noise; and strict adherence to FEV mechanical development procedures ensures lower failure rates, longer life, and a warranty of 250,000 kilometers or 20 months. In terms of high-pressure oil pump configuration, the YC6M engine can be equipped with either a BOSCH or domestic oil pump, depending on user preference and budget. Yuchai believes that nothing beats user praise. Dealers report that the Yuchai 6M four-valve engine has created a big impression across the board. Many customers now prefer Yuchai four-valve engines, with some purchasing them multiple times. A customer in Shandong consulted a technical expert and bought two Yuchai 6M four-valve engines, replacing them in his existing models. He recognized the four-valve engine as a higher-grade alternative to traditional two-valve engines, finding it expensive but worth the cost—like choosing a color TV over a black-and-white one. Yuchai’s 6M four-valve engine is not only more fuel-efficient but also more comfortable. With China’s oil prices remaining high, Yuchai, which once led the Chinese internal combustion engine industry toward turbocharging, moderate cooling, and emission upgrades, has introduced the four-valve engine at the right time, showcasing its leadership. “To satisfy the public with excellence and leadership” is Yuchai’s mission. We believe that Yuchai, with its strong sense of social responsibility, will make even greater contributions to building a resource-saving and environmentally friendly society.

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