Yulin, December 21st (Reporter Pang Geping) Today, Guangxi Yuchai Machinery Group Co., Ltd. and Brunel University of the United Kingdom demonstrated the latest results of their cooperation in Yulin City - the world’s first use of existing Component technology realizes the engine of renewable air hybrid function, which marks Yuchai has made new breakthroughs in the research and application of new energy technologies and reached the international advanced technology level.
Renewable air hybrid technology refers to the use of patented technology to recover the compressed air generated by the engine during the braking process on the basis of the existing internal combustion engine technology without adding any battery or motor power system. The air is effectively managed and reused for engine start/stop control, low-speed boost compensation, and vehicle pneumatic system gas supply compensation, which not only reduces fuel consumption for conventional vehicles, especially for urban buses. Carbon dioxide emissions, but also to improve the vehicle's acceleration performance, eliminate black smoke when accelerating.
According to Zhao Ping, chairman of Guangxi Yuchai Machinery Group Co., Ltd., and Zhang Ping, director of the Department of Mechanical Engineering at Brunel University in the UK, director of the Advanced Power and Fuel Center, and vice chairman of the British University Internal Combustion Engine Association, the technology has six advantages:
The first is renewable compressed air energy. According to the detailed collection and analysis of urban bus operating conditions, it was found that the braking conditions accounted for 15% of the entire vehicle operating conditions. When a conventional vehicle is running, the braking energy generated by deceleration and braking conditions becomes frictional heat loss. If you can effectively recover the energy lost during braking, this energy will be completely free and renewable energy. The renewable air hybrid technology achieves the effect of energy conservation and emission reduction by reusing the recovered energy through the addition of patented compressed air recovery devices and compressed air storage tanks to achieve braking energy recovery.
The second is having excellent fuel efficiency. For the special driving conditions of urban buses, the Regenerative Start-stop function using renewable air hybrids can achieve a fuel saving rate of more than 6%, in some typical cities (such as Beijing and Shanghai). The fuel saving rate can reach more than 10%. At the same time, the use of compressed air recovery, the vehicle pneumatic device to supplement gas supply compensation, reduce the original engine configuration of the air compressor power, reduce the engine accessory power consumption, thereby reducing fuel consumption, can achieve about 2% of the fuel economy.
The third is low carbon emissions. Calculating the installation of the device for every 1,000 urban buses per year, it can save 200,000 liters of diesel annually, which is equivalent to a reduction of 600 tons of carbon dioxide emissions per year.
The fourth is to improve engine performance. Recovered compressed air is used to compensate the engine's low-speed working conditions and sudden acceleration conditions to compensate for the lack of efficiency of the low-speed supercharger and the lack of intake of the supercharger and improve the low-speed response of the engine. Reduce the production of black smoke.
The fifth is to reduce maintenance costs. While recovering the braking energy, the system can also achieve the engine-assisted braking function, reducing the wear of the brake pads, prolonging the service life of the brake pads and reducing the maintenance cost.
Sixth, it is a cost advantage. With the advent of electric hybrid power, some electric hybrid powers convert brake energy into electric energy for reserve use, and realize the function of energy recovery for braking energy feedback. However, electric hybrids require additional motors, batteries, and new transmissions at a higher cost. The renewable air hybrid technology requires only the addition of a patented compressed air recovery device, compressed air tank, air motor, and some necessary piping. The cost is less than one-tenth that of electric hybrids, and the subsequent maintenance cost is comparable to conventional engines. .
In April 2008, Yuchai established a "Yuchai-Brunel R&D Center" in cooperation with Brunel University to jointly develop a new generation of high-efficiency, low-emission engine technology. After one and a half years of R&D, the two parties completed two prototype trials and related functional tests in December 2009, achieving renewable compressed air recovery, storage, and engine start-stop control. In the next step, Yuchai will do a good job in promoting the use of renewable air hybrids and strive for mass production after one year.
The successful application of renewable air hybrid technology fully embodies Yuchai’s core philosophy of “green development, harmony and mutual benefit†and the consistent tenet of “technology first, green and win-winâ€. The leading technology has ensured the leading position of Yuchai products in the market and led to the rapid development of the company. Since 2001, Yuchai's diesel engine production and sales have ranked first in China for 8 consecutive years. From January to November 2009, Yuchai overcomes the adverse effects of the financial crisis and achieved sales of 620,000 diesel engines, a year-on-year increase of 18.69%.
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