Passenger car companies LNG vehicles are becoming more mature

The rise in domestic oil prices not only affects the truck users engaged in cargo transportation, but also makes long-distance passenger transport and urban public transport into the plight of rising costs. Coupled with the increase in people’s awareness of environmental protection, passenger and bus companies have invariably turned their attention to clean energy products – LNG buses. In response to market demand, various bus manufacturers also began to actively expand the LNG market.

Yutong: Advanced technology and superior performance

As the first brand of Chinese passenger car, Yutong has always been at the forefront of the industry in terms of clean energy applications and product development. As the first batch of manufacturers in the passenger car industry to obtain the National AQSIQ Cylinder Safety Class I installation license, Yutong has a formed gas pipeline, professional high pressure sealing inspection and vacuum process, which ensures the gas pipeline sealability, and thus the largest Limits reduce the possibility of leaks and ensure vehicle safety. The outstanding economy and safety made Yutong bus proudly occupy the domestic LNG passenger car market. According to statistics, Yutong LNG passenger car has the highest domestic market share, and its share has steadily increased. In March 2012, Yutong Bus received large orders for LNG projects in Ningbo, Beijing, Suzhou and other places, accumulatively selling 129 LNG buses and 75 LNG buses; on April 2, 2012, 100 LNG buses from Yutong were delivered to Langfang, Hebei. .

Yutong’s use of new technologies and new processes is also worthy of recognition, in addition to reliable product quality and professional service. Yutong ZK6936HGN car passenger car cathodic electrophoresis process, can fully enhance the vehicle's anti-corrosion capabilities, so that the vehicle's durable quality and aesthetic increase. Passenger vehicles built with Yutong electrophoresis lines can withstand salt spray for more than 1,000 hours, which is equivalent to no rust in the interior and exterior of cars for 8 to 10 years under normal climatic conditions. This ensures that vehicles throughout the entire operation period are as bright as new. “Utton buses using vehicle cathodic electrophoresis technology can be used to keep the body from moving during the life cycle. This technology is very good and very practical,” said Gao Zenghui, Yutong’s largest customer and technical director of Tianjin Binhai Bus Group.

Adhering to the "customer-centric" philosophy, Yutong has invested heavily in recent years to build a chassis production line, the world's leading vehicle cathodic electrophoresis line, the industry's only passenger car testing center, etc., to continuously improve product quality and performance, to provide customers with greater Value products and services. Today, Yutong has the largest production and sales scale in the industry, the most extensive product line, and the most advanced production technology and technology research and development environment and capabilities. Through the transformation of management, Yutong’s integration advantages are being further strengthened, and the strength of transforming advanced technological competitiveness into market competitiveness is also continuously increasing.

Big Dragon: Energy Saving, Environmental Protection and Efficient

At the Nanjing Bus Show in March, Dajinlong displayed its new LNG environmental protection bus, the XMQ6106BGN4.

According to reports, the car uses non-polluting, zero-emission LNG (liquid natural gas) power, integrating environmental protection, large-scale bearing and humanity in one, represents the development direction of a new generation of urban buses. "In terms of design, the car's configuration and performance have been further optimized. Lengthening of the wheelbase, reducing the thickness of the front wall, increasing the width of the vehicle body, increasing the effective area of ​​the standing area, and reducing the height of the rear step above the engine room, The passenger comfort of the rear passengers has been improved, and the humanization and practicality of the vehicle have been improved.At the same time, compared with traditional diesel buses, Daikin Dragon XMQ6106BGN4 has saved fuel costs by about 20%, and its maintenance costs have also declined. More significant, it is expected to be more favored by customers in the demonstration and promotion of domestic energy-saving and new energy vehicles, said the above-mentioned staff.

In March 2013, 100 units of XMQ6106G and 110 units of XMQ6931G from Dajinlong and 210 units of LNG buses were officially delivered to Dongguan Bus Company. Since this year, Dongguan Bus Company has purchased 262 LNG series buses and highway buses from Dajinlong.

The company's business manager Dongguan Yu Yadong introduced that in order to win the bulk orders for the Dongguan bus, Dajinlong technical staff based on the layout of the public transportation in Dongguan, the distribution of densely populated spots in urban areas and townships, combined with the distance of the line operation, to purchase The 100 XMQ6106G and 110 XMQ6931G buses took a number of detailed design adjustments.

The large LNG cylinder capacity enables buses to run continuously for 400 to 500 kilometers at a time. The layout of the cylinders is optimized to provide a powerful guarantee for the convenient refueling and safe driving of public transport vehicles; the newest option for Weichai has been installed. LNG engines provide reliable power for vehicles and further increase energy efficiency and reduce vehicle operating costs. After the 262 LNG buses and passenger cars of Dajinlong are put into operation, they will open up an environmental travel network between the urban areas of Dongguan and various towns and cities. The daily travel of the citizens will also be more convenient and environmentally friendly.

Dajinlong also pays attention to the development of overseas markets. As early as 2011, Dajinlong provided 80 CNG buses XMQ6106G to Bangkok Public Bus Company.

According to Chen Yuxin, business manager of Daikin Dragon Overseas Sales Division, Thailand is located in Southeast Asia and belongs to the tropical monsoon climate. The high temperature and rainy weather throughout the year, coupled with relatively poor road conditions, has a high demand for bus operations. At the same time, Daikin Dragon upholds the concept of “customer first”. After the vehicle arrives in Thailand, it arranges 3 key service engineers to provide timely service such as vehicle commissioning, maintenance and practical operation training. After the normal operation of the vehicle, an after-sales service engineer was also stationed locally to respond to customer needs in 24 hours.

Haig: exquisite workmanship and safety

At present, Hager is also working hard to develop LNG passenger cars, and it has also taken a multi-pronged approach to safety, energy conservation and training services to improve the core competitiveness of products and promote the healthy development of the industry.

The LNG bus is the new darling of the passenger car market in recent years and is also one of the major development directions of the bus market in the future. Therefore, in addition to insisting on research and development on the basis of mature diesel models, the Higer Bus also makes extensive use of new technologies unique to gas vehicles.

“All safety valves, globe valves and one-way valves of our LNG passenger car gas supply system are all imported international brands to ensure vehicle safety and quality. At the same time, in order to reduce gas consumption without affecting power, technicians specifically design and match A low-inertia small volute turbocharger can save about 3% of the air volume with this technology alone.In addition, most of the gas-fueled passenger cars on the market have a safety valve exhaust pipe that is discharged from the rear of the car, but after our After careful study of the test, it was specially designed to be directly discharged from the roof to the air to facilitate the rapid diffusion of excess gas.” Haig Bus technicians told the “Commercial Automotive News” reporter, according to the customer's operating circuit characteristics, the manufacturers also provided biases. The two types of complete vehicle matching schemes are power-driven and economic-oriented, and after being put into operation, the data collected by the G-BOS intelligent operation system is accurately calibrated twice to maximize the economic efficiency of the entire vehicle. As the new technology continues to be developed and used, the quality of the vehicle itself has also been improved. It is understood that in order to protect the quality of products, Higer has applied sophisticated production equipment in every production process.

“At present, before the car body skeleton is put into production, the cutting equipment that is commonly used in the market is still a plasma cutting machine. Although the equipment is low in cost and easy to operate, the disadvantage is that the accuracy is not high, and the maximum accuracy can only be controlled within ±0.1 mm. In actual operation, due to the influence of artificial skill level and proficiency, the error range is far greater than this figure, resulting in uneven quality of the final product, leaving potential safety hazards.” Higer technical staff said that in order to solve this problem, Hager did not hesitate to invest heavily in the introduction of large-scale laser cutting machines. All of them were numerically controlled with an accuracy of ±0.03 mm. The cut workpieces were uniform and far exceeds the requirements for process accuracy.

In June 2011, Hager Bus also invested more than 200 million yuan to introduce the industry's most advanced large-scale vehicle electrophoresis production line and began formal operation. Nowadays, the anti-corrosion of each body of a Higer passenger car is changed from the current industry's traditional painting varnishing process to the electrophoretic coating process.

"Experimental results show that after Hager's advanced 16-step electrophoresis process, the anti-corrosion capability of the entire vehicle frame can reach 10 years or more, overcoming the traditional painting varnish process, leaving the dead angle, the uneven thickness of the paint film, and prone to sagging and pitting. Equal quality problems: After the electrophoresis, the surface of the tube is smooth and the adhesion of the paint film is strong, not only the dead surface of the whole frame of the vehicle is completely dead, but even the inner wall of all the tubes is attached with a uniform paint film as the outer layer. The technicians stated that the reference to advanced technology in each process has ensured the safety of Hager buses.

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