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The JAC self-produced machine chassis won the mass purchase order of coach industry giant Xiamen Jinlong. After the Zhongtong Bus, Shaolin Passenger Car, and Friendship Bus, the JAC Self-produced Machine Chassis once again succeeded in hand-holding domestic well-known bus companies, which means this series of products. It has been widely recognized by the mainstream bus companies in the industry and has become the mainstream choice for the 5-7 meter passenger car market.
In recent years, with the rapid development of the passenger car industry, more and more bus companies have adopted self-made chassis, and the amount of out-purchased bus chassis has decreased year by year. What are the reasons that prompted mainstream passenger car manufacturers to outsource JAC's 5-7m self-produced engine chassis? 
Professional quality comes from integrated design
As the core component of a passenger car, the chassis directly affects the carrying capacity, comfort and safety of the vehicle, and the quality of the chassis directly determines the overall quality of the passenger car. Therefore, the mainstream passenger car companies have very strict requirements on the chassis quality.
JAC has been able to develop high-quality chassis for its own production machines, thanks to its deep technical know-how. The 20-year accumulation has enabled Jianghuai Automotive to have a professional strength in the exclusive chassis for buses. In addition to the four-level research and development system of the Jianghuai Automobile Group, the Jianghuai chassis has certain technical advantages that cannot be achieved by bus companies.
The chassis of the automobile consists of four parts: the drive train, the driving train, the steering system and the brake system. How to match these parts together and achieve stability and high efficiency has always been the essence of the chassis technology. It's like a computer. It can only be compatible with CPU, memory, motherboard, and graphics card to ensure stable operation and maximum performance. JAC's self-produced machine chassis relies on the integrated design concept and shows core competitiveness in the chassis' overall matching.
"The first choice was the engine. We chose the mature 4DA1 engine from JAC. It uses advanced components such as Bosch's electronically controlled high-pressure common rail and low-noise gear. The maximum power is 88 kilowatts, and the fuel consumption per 100 kilometers is only 8 liters, which is higher than the market. Less than 10% of similar models." Engineer of Jianghuai chassis technology research and development department introduced.
"The core of the chassis design is the matching of the power system with the chassis system. After selecting the engine, we have optimized during the matching process. We have performed precise test calculations on the matching of the engine speed and the gearbox speed ratio to reach the full speed field. The best fuel economy within the unit, the use of Electronic Control Unit (ECU) electronic control unit, collecting information from sensors to perform calculations to control engine ignition, air-fuel ratio, idle speed, etc. In addition, using finite element software CAE (Computer Aided Engineering) analysis was conducted to design a complex variable-thickness, variable cross-section structure based on the stress conditions of each part, and to reduce the unnecessary local thickness under the premise of ensuring sufficient strength, thereby realizing the lightweight of the beam and The combination of strength and toughness; and the use of a reinforced, low-leaf spring suspension not only reduces the height of the chassis, but also enhances the stability and comfort of the product, while enhancing the carrying capacity of the chassis."
The integrated design enables JAC's self-produced machine chassis to perform well in terms of economy and stability. JAC has won batches of purchase orders for bus companies such as Shaolin, Zhongtong, Meihua, Lushan and Xiamen Jinlong this year. JAC has since 2010 Chassis marketing company has accumulatively sold 2870 self-produced chassis, an increase of 275.2% year-on-year, and professional quality has been recognized by mainstream bus companies. 
Scale advantages Strengthen market competitiveness
Most of the bus companies' self-made chassis, frame, engine, transmission, and bridge components are all purchased from the market. The main task of the bus companies is assembly. Only such a production method can control the cost under the outsourcing chassis price without investing in large-scale equipment. However, this method also determines that bus companies are not suitable for products with high technological content and large investment in the previous period, such as self-producing engine chassis.
“Automotive is an industry that pursues economies of scale. The greater the output, the lower the cost. The annual output of JAC commercial vehicles (light trucks, heavy trucks, and passenger car chassis) exceeds 200,000 vehicles, and the cost advantage is very obvious. Independent bus companies cannot achieve this. In addition, many bench tests and testing methods required for R&D of automotive products cannot be undertaken by independent bus companies. In particular, some key assemblies, such as engines, transmissions, and bridges, must have a certain amount of product sales. To share,†explains Cha Bao, general manager of JAC's chassis marketing company.
Relying on the scale advantages of JAC commercial vehicles, JAC's self-production chassis products effectively control the cost of design, processing technology, and material procurement, and are more advantageous in terms of price than bus manufacturers, and thus occupy the advantage of the chassis market.
With the development of bus technology, bus companies are increasingly required to adopt cutting-edge technologies and modular design. The cooperation between passenger car manufacturers and key manufacturers in key technologies will become more and more close, because a single bus manufacturer cannot afford high development costs. Fees, there is not enough energy. They only have to bundle with commercial vehicle chassis manufacturers to design their own unique products in order to achieve lasting development.
Take the initiative to hand the bus company
At the beginning of this year, Jianghuai Automobile launched a tour exhibition of 100 provinces and counties with the theme of “Professional Quality, Renewed Glory†for the chassis of the self-produced machine. During the event, it passed Shaolin, Sheshan, Antong, Changlu, Meihua and Zhongtong. Bus companies such as Anyuan, Wanda, Jianghuai and other passenger vehicles jointly exhibited themselves to take full advantage of the integration of chassis manufacturers and bus manufacturers, and established a platform for communication and exchange with the urban and rural passenger and bus industries. Currently, the tour team has passed through Henan, Hebei, Anhui, and Jiangxi. In Hubei, Shaanxi, Yunnan, Guizhou, Chongqing, and Liaoning, the brand influence of JAC's self-produced engine chassis in urban passenger transport enterprises and end users has been greatly improved. 
In the fierce market competition, Jianghuai successfully found a “blue sea†with 5-7 meters of self-produced chassis products, and built its core competitiveness in the industry with professional quality, leading technology and price advantages. The professional cooperation between the chassis plant and the bus plant will be the future trend, and the JAC chassis that has taken the initiative will once again consolidate the status of the industry leader.