Yuchai's innovative hybrid can drop another 10% oil

Only on the basis of the existing internal combustion engine, adding a few simple modules, you can achieve significant energy saving effect. The latest cooperation between Guangxi Yuchai Machinery Co., Ltd. and the UK's Brunel University, a renewable air hybrid engine, was launched in Yuchai recently.

This is the world's first engine that uses the existing component technology to realize the renewable air hybrid function. The advent of this engine marks Yuchai's new breakthrough in new energy technology research and development and application fields. The international advanced level. At the time when Copenhagen’s World Climate Conference had just come to a close and international and domestic energy-saving emission reductions were rising, Yuchai’s efforts to launch this innovation were well-intentioned.

Small changes give birth to big benefits

The “Realization of Renewable Air Hybrid Technology Functions” conference was held at Yuchai Engineering Research Institute. The conference was hosted by Shen Jie, Chief Engineer of Yuchai Machinery Co., Ltd. Yu Ping, chairman of Yuchai Machinery Co., Ltd., general manager Li Tiansheng, director of the Department of Mechanical Engineering at Brunel University in the UK, and director of the Advanced Power and Fuel Center, and Vice Chairman of the British University Internal Combustion Engine Federation Zhao Hua attended the conference.

Zhao Hua said: "Renewable air hybrid technology refers to the use of patented technology to recover the compressed air generated by the engine during braking without adding any battery or motor power system based on the existing internal combustion engine technology. Through the effective management of the recovered compressed air, they are re-used for engine start/stop control, low-speed boost compensation, and vehicle pneumatic system gas supply compensation, which not only reduces the fuel consumption of conventional vehicles, especially urban public transport vehicles. And carbon dioxide emissions, but also to improve the vehicle's acceleration performance, eliminating the phenomenon of black smoke during acceleration."

Shen Jie explained to reporters in the field the six major advantages of the technology.

The first is renewable compressed air energy. According to the detailed collection and analysis of urban bus operating conditions, it is found that braking conditions account 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 it 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, Regenerative Start-Stop (renewable start-stop) can be achieved using renewable air hybrids. The fuel saving rate can reach more than 6% in some typical cities (such as Beijing and Shanghai). The oil 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 1,000 buses per year in urban buses will save 200,000 litres of diesel annually, which is equivalent to a reduction of 600 tons of CO2 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 realize the engine-assisted braking function, reduce the wear of the brake pads, prolong the service life of the brake pads, and reduce the maintenance cost.

Sixth, it is a cost advantage. With the advent of electric hybrid power, some electric hybrid powers convert braking energy into electric energy for storage and utilization, and also realize the function of braking energy feedback for energy conservation. However, electric hybrid power requires additional motors, batteries, and new transmissions at a relatively high 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. .

Yuchai reinvents new precedent

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-win”.

As the largest internal combustion engine manufacturer in China, Yuchai has been putting product technology development in a prominent position for many years. It has always followed the principle of “pilot selection and application” and always adhered to the “production generation, R&D generation, and plan generation” and focused on “improving product technology. The technological innovation route of "level and perfect product structure" has launched a series of product development.

Whether it is from a vortex engine to a direct injection engine, or from a supercharged engine to a supercharged intercooled engine to an electronically controlled engine, every time the product is upgraded, Yuchai has been at the forefront of the domestic industry and has effectively promoted the internal combustion engine in China. Improvement of technology.

The relevant person in charge of Yuchai believes that the cooperation in the development of renewable air hybrid technology will give full play to the industrialization capability of Guangxi Yuchai and the scientific research capability of Brunel University in the UK, so as to achieve mutual complementarity and common development.

In April 2008, Yuchai established a "Yuchai-Brunel R&D Center" in cooperation with Brunel University. The two parties conducted a series of academic exchanges and technical cooperation to jointly commit to a new generation of high-efficiency and low-emission engine technology. Research and development. Renewable air hybrid technology is an important joint research and development of the two parties. It took a year and a half to complete two trial prototypes and related functional tests in December 2009, achieving renewable compressed air recovery, storage, and engine start-stop. control.

Yuchai's leading position in technology has ensured Yuchai's leading position in the market and led to the rapid development of the company. According to statistics, as an independent diesel engine manufacturing enterprise, since 2001, Yuchai's diesel engine production and sales have ranked first in domestic peers for 8 consecutive years, maintaining a double-digit high growth rate for 8 consecutive years; January-November 2009 Yuchai also broke through the adverse effects of the international financial crisis, accumulatively achieving 620,000 units of diesel engines, an increase of 18.69% over the same period of last year, and continuing to write the “Yuchai phenomenon” in which contrarians rose.

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