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With the mission of “giving devotion to clean energy and creating a harmonious environmentâ€, Yuchai has made a series of major breakthroughs in technological innovation and continuously introduced new products and products, among which Yuchai Heavy Machinery YC6L emissions The continuous escalation of overall performance is a typical example.
In 2002, Yuchai conducted the road test of China's first four-valve heavy-duty diesel engine YC6L; at the end of 2002, it jointly developed a heavy-duty prototype vehicle supporting YC6L with Dongfeng Liuzhou Automobile and Shaanxi Heavy Duty Truck; in 2003, Dongfeng Liuzhou Automobile YC6L heavy truck quietly enter the market.
The four-valve technology increases the valve cross section by about 15%, which helps to reduce the intake and exhaust resistance and increase the intake air volume; the four-valve technology makes it possible to vertically center the injector, and the fuel injectors in the vertical mid-position injector have It helps to evenly mix the air in the combustion chamber. Increased intake air volume and improved quality of oil and gas mixture help reduce fuel consumption and exhaust pollutant emissions.
The difficulty of four-valve technology lies in the manufacture of its cylinder head. Yuchai's experienced die design and foundry technicians took the lead in manufacturing four-valve diesel engine cylinder heads in China in 2000.
As a high-grade heavy-duty engine based on the advanced technology of the 21st century global modern diesel engine, Yuchai's four-valve Euro II YC6L power covers 206 to 257 kW (280 to 350 PS) and is suitable for 10 to 13.7 m passenger cars and 10 to 15 t heavy trucks; Germany's FEV-specific combustion system technology is used to ensure perfect combustion; the Euro II model uses the P7100 injection pump to ensure better fuel atomization; a wet cylinder liner structure and European forced-cooled piston technology are used, Ensure better cooling performance; adopt patented technology of point-line meshing gears to ensure lower engine noise; strictly follow FEV mechanical development procedures for mechanical development to ensure lower engine failure rate, longer life, and guaranteed 250,000 km (or 20 month).
In 2003, when most of the domestic engine products were still upgraded in Europe I, Yuchai has fully completed the standard of Euro II, the timely launch of the four-valve Euro II heavy machine YC6L, which shows Yuchai people's strong technical strength and strong Social responsibility. In the same period, Yuchai took the lead in launching the first domestic engine to reach the Euro III standard. This time was more than three years earlier than that of its peers. Relying on the good performance of the heavy truck market, Yuchai Euro III Heavy Machinery YC6L began to enter the domestic passenger car market.
With increasingly stringent emission regulations, electronically controlled fuel injection technology, optimization of in-cylinder combustion, and improved fuel quality have gradually become important measures for effectively controlling emissions and achieving Euro II to Euro III upgrades. Euro III Heavy Machinery YC6L is a modern vehicle diesel engine designed and developed by Yuchai and German FEV, which is the latest technology in Europe. The United States Delphi electronic control unit pump, the maximum injection pressure of 1800bar; small hole 7 hole injector, combustion performance. Automatic correction of the atmospheric environment, to achieve smooth operation from -40 °C ~ 50 °C environment, while adapting to different altitudes from sea level to 4000 meters. With automatic fault diagnosis, intelligent power, idle load control and other advantages. The Yuchai single-pump system Euro III engine is tailor-made for the current domestic actual use environment, developed independently, fully adapted to China's national conditions, the failure rate is still very low in the domestic road conditions and fuel conditions, the problem is small, the user Benefits are guaranteed.
In 2004, Yuchai started the Euro IV project with great social responsibility in response to the rapid growth of domestic auto production.
In 2005, Yuchai technicians closely followed the development trend of international technology and first proposed the SCR exhaust after-treatment technology route for heavy-duty diesel engines in China. In 2006, it gradually became the consensus of domestic counterparts.
In 2006, Yuchai YC6L equipped with a domestic SCR controller performed Euro IV (National IV) emission certification at the National Center for Automotive Quality Supervision and Inspection (Tianjin) Transient Emission Test Bench. YC6L became the first national Euro IV diesel engine approved by the National Automobile Inspection Center and the National Environmental Protection Agency. As a result, the first domestically-developed Euro IV heavy-duty diesel engine was announced in Yuchai.
With the full implementation of the Beijing Euro III emission regulations, the procurement of Euro III passenger cars by major tourism companies has been fully upgraded. For example, Beijing CYTS has used 35 Neoplan coaches equipped with Yuchai YC6L Euro III engines in major tourist units. The CYTS feedbacks that these high-end tourist buses using Yuchai Euro III machines have good acceleration performance, significantly lower noise than imported engines, and 3 to 5 liters/hundred kilometers less fuel consumption than imported products.
In 2006, Beijing Shouqi Co., Ltd. took into consideration the reception needs of the “two sessions,†and specifically ordered 30 gold passenger cars equipped with YC6L Euro 3 engines. The operation was in good condition and no malfunction occurred. The Yuchai YC6L Euro IV diesel engine, which is about to embark on the streets of Beijing, has passed thousands of hours of tests of homemade diesel and domestically-added blue (standardized vehicle urea), and has been optimized specifically for the characteristics of urban public transport operations in China.
View related topics: Yuchai won the "China Brand Annual Award NO.1" (internal combustion engine) title in 2007
March 31, 2021