With the continuous tightening of national emission regulations and increasing demands from users on vehicle cost, performance, fuel consumption, etc., modern trucks have higher requirements, and the currently existing parts of the industry have their own mode of battle. To maximize the resultant force to support the vehicle to obtain the best performance, the single combat mode has been difficult to adapt to the development of the modern industry, especially in recent years, the intelligent driving of the entire vehicle, intelligent control of the powertrain and other technologies have made great progress, parts and components With the parts, the connection between the assembly and the vehicle is getting closer, and it is urgently necessary to integrate the upstream and downstream industries through the bottom-up or top-down integration to better realize the systems. The matching and step-by-step coordination form a concerted effort to reduce costs and improve performance. Many outstanding commercial vehicle groups such as Daimler-Benz and Volvo have top-down vehicles, powertrains, and components and vertical industry chain resources. Recently, MAN and Scania have jointly developed their own transmissions. Also fully explained this issue.

The advantages of powertrain

The powertrain is the core of commercial vehicles. The power, economy, comfort, cost, reliability, safety and environmental protection of the entire vehicle are all related to the powertrain. Through the integrated development of intelligent matching, intelligent control of each sub-assembly communication and coordination, the powertrain can realize the optimization of the performance of the entire vehicle, and make all parts and components have a unified management system, based on the improvement of product quality. On the other hand, production, procurement, maintenance, and after-sales service are more secure, which can minimize the total life cost of the vehicle and bring more economic benefits to customers.

Specifically, in improving the performance of the entire vehicle, during the integrated development process of the powertrain, the intelligent matching technology is used to make the selection and matching of the engine, transmission and drive axle more reasonable, and on the basis of improving the vehicle's dynamic performance, Effectively reduce the overall fuel consumption of the vehicle; using thermal management and CFD simulation technology, powertrain NVH optimization technology, can greatly enhance the comfort of the vehicle; through intelligent control of the communication and collaboration of the various subsystems, can significantly improve the powertrain The service life improves the reliability of the vehicle.

The powertrain allows all parts and components to have a unified management system and formulate effective and effective production safeguard measures in accordance with market demand. Through the production of information management, real-time monitoring of the production system can improve the consistency of powertrain products and product quality; and through the establishment of maintenance and after-sales service protection system, can effectively solve customer problems, improve maintenance quality and after-sales Services, enhance customer satisfaction; through the integration of resources, a unified price, unified management of production, a unified product transport routes and transport companies, optimize the assembly product procurement system, you can promote assembly product production and procurement costs.

The reduction of fuel consumption, improvement of quality, maintenance and after-sales service are guaranteed, which greatly reduces the cost of use, maintenance, and repair of the customer, thereby reducing the overall life cost of the vehicle and bringing more economic benefits to the customer. The advantages of success have thus become the company's core competitive advantage.

Weichai, as "the first company to eat crabs"

In the industry, Weichai is one of the earliest companies to create the core competitiveness of powertrains. As early as 2005, Weichai absorbed the merger of the Hunan Torch, integrated the advantages of its resources in the vertical industry chain, and established an international enterprise group with a core technology of “building a complete vehicle” and developing the powertrain as a unique global equipment. The vision of an important pole in manufacturing is set sail.

With the most complete domestic commercial vehicle diesel engine, transmission, and drive axle R&D and manufacturing system, Weichai already has the strength and heritage to achieve this goal.

As the most influential heavy-duty engine brand in China, Weichai Power Engine has a long-term market share in the industry. It has strong R&D strength, a sound talent team and a complete product line. Vehicle engine displacement covers from 2L to 13L. Domestically, five R&D centers have been established in Weifang, Shanghai, Yangzhou, Hangzhou, and Chongqing, and R&D institutions have been established in the United States, France, Germany, and Italy.

Weichai's Fast Company has the largest sales volume of heavy-duty transmissions in the world, and its market share in domestic heavy-duty vehicles is close to 80%. Its research and development and testing capabilities rank first in the country. In 2010, Fast established the Technical Research Institute, built a domestic leading, world-class high-level product testing room, and had 600 research and development technical teams; in May 2011, it established a joint venture with Caterpillar to produce a full range of automobiles. Automatic Transmission.

The Hande Axle under Weichai is the most scientific and technological flagship enterprise integrating research and development, manufacturing and sales in the domestic axle industry. Each series of bridge assemblies has been equipped with China's heavy military off-road vehicles and domestic famous heavy-duty truck companies in batches. The commercial vehicle has a national bridge assembly test center and a trial production workshop matching it. It has strong R&D strength and has a research and development technical team of 200 people.

Currently, Weichai has a full-featured modern test center, including a five-axis powertrain assembly test stand, a complete vehicle drum test stand, a high-pressure common rail oil pump test stand, a three-high environmental test chamber, a CVS full-flow test system, and tilt tests. Taiwan, friction tester, transmission test stand, drive axle fatigue test stand, transmission test stand, etc., can perform tests on powertrain assemblies, engines, transmissions, drive axles, and other components. It has a complete pilot plant and 83 sets of pilot equipment, all of which are world-class manufacturing equipment. The high-quality powertrain development team consisting of nearly 300 engineers has extensive experience in product development and engineering.

The blueprint for the powertrain has already leapt to the paper. Through the joint European R&D center, AVL vehicle R&D center, and well-known experts in domestic and international automotive industry, we focused on Weichai, Fast, and Hande technology elites. It took 6 months and cost more than 20 million yuan. Weichai was in 2007. At the end of the year, the first domestic commercial vehicle powertrain systems were introduced. After strict matching tests and demonstrations, all aspects of data are outstanding, and they are the best power systems in the domestic automotive industry in terms of dynamics, economy, and reliability. solution.

Ascendas on the new platform

From 2009 onwards, Weichai Power applied for the construction of the "National Research Center for Commercial Vehicle Powertrain Assembly Engineering Technology", which has now passed acceptance and is formally listed. On this platform, Weichai has undertaken and completed a number of projects of the Ministry of Science and Technology, including the development of powertrain assembly systems for trucks and powertrain assembly development projects for tractors.

The powertrain assembly development project for trucks includes the first deployment of WP5-country V-series engines on trucks, and a more comprehensive technical and experimental study of the powertrain assembly of the trucks, achieving an overall fuel savings rate of 12.75%. -14.22%, the emissions have reached the national V level, and have been successfully applied on the Shaanxi MHC new M3000 trucks. The project has filed a total of 6 patents for inventions, mastered the method and development process for the optimized matching of powertrains for trucks, and established the gold industrial chain for the powertrain of the Group's trucks.

During the development of the development project of the tractor powertrain assembly, the research and development personnel of Weichai conducted a full-scale matching and experimental study on the powertrain of the tractor, enabling the tractor to be able to Achieve 13.75% of fuel economy. The project applied for six invention patents, mastered the method and development process for optimal matching of the powertrain assembly of the tractor, established a high-quality talent team, and improved the collaborative development capabilities of the group's subsidiaries.

Within the Weichai Group, aiming at Yaxing's product development plan, the Group will optimize the Group's engine, transmission, axle and other powertrain assemblies as well as the vehicle intake and exhaust system, cooling system and suspension system to improve Yaxing's passenger cars. Product market competitiveness. The 12-meter intercity bus powertrain assembly matching technology research project has also made breakthrough progress. It has applied for four invention patents. Under the conditions of power performance and benchmarking, the fuel consumption of users' actual road tests has decreased by 10.49%. The YBL6125H2QJ full load-bearing series of luxury road passenger coaches equipped with power optimized for project development won the Best Road Passenger Car Award at the 2012 Beijing International Road Transport and Urban Public Vehicle Parts Exhibition. The project has achieved very good economic benefits. Since January 2012, the entire vehicle product has sold more than 400 vehicles, with a total output value of approximately 275 million yuan and a profit of approximately 9.827 million yuan.

Weichai Heavy Duty Trucks, a subsidiary of Weichai, has also made breakthrough progress in its existing product powertrain fuel reduction projects. The project team carried out a powertrain matching analysis study on the existing seven heavy truck truck prototypes of Shaanxi Heavy Duty Truck, proposed an optimal powertrain configuration plan, focused on the X3000 tractor, identified typical users, extracted typical roadmaps, and developed applications. , Carry out comparative test analysis of multiple drum programs, customize the optimal configuration scheme for typical users, and finally perform user test verification. Through closed-loop research on the powertrain, the project achieved a 3.33L/100km reduction in fuel consumption for the user's vehicle cycle. “After selecting the Weichai heavy-duty truck powertrain, the power is significantly increased. In the past, when climbing, it was downgraded to 7th gear. Now the 8th gear is easy to uphill. Even more gratifying is that the fuel consumption is significantly reduced. Previously, 3 pieces of oil were burned per kilometer. 2, now only need 3 dollars, run a trip will be able to save 600 yuan of oil money!" A supporting heavy duty truck power assembly Weichai heavy truck Li Jiachun heavy card users feedback.

The future direction

For the future, the new breakthrough in vehicle performance is centered on the powertrain. For the moment, the advantages of the powertrain still need to be further developed. Weichai plans to work hard on the high-efficiency and modularization of the transmission.

A large part of the performance of the powertrain depends on the high efficiency of the transmission system. With the gradual intensification of urbanization, rapid transportation is an inevitable trend. Engines, gearboxes and axles are key components in the chassis of commercial vehicles. Their high efficiency and high technology will increase transportation efficiency and reduce logistics costs. In the future, high efficiency and high technology can be achieved in terms of engine performance, transmission system NVH performance, gearbox transmission efficiency, axle deceleration pattern, wheel braking method, and braking energy recovery.

In view of the increasingly stringent emission regulations, the space for a single component or system to improve performance is not significant, and the modularization of the powertrain system is one of the key development directions for future work. The development of modern electronic control technology and CAN bus technology makes the power system assembly an inseparable whole. Through the integration and optimization of engine, clutch, transmission, drive axle and other sub-assemblies, the comprehensive performance of commercial vehicles can be significantly improved. Make commercial vehicles safer, more reliable, and more environmentally friendly.

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