Since RAND Corporation was responsible for organizing the implementation of the National 863 Program, the development of "extended/plug-in heavy-duty commercial vehicle chassis development" has been carried out in the process of industrialization of extended-range heavy-duty commercial vehicles and increased-program wheel-driven electric buses. The key components and core technical issues were studied.
Relying on the National 863 Project, RAND Corporation relies on years of R&D experience to integrate superior resources and strictly follow the product development specification system process, in oil/electricity, gas/electric range extender matching control, power battery energy management system, vehicle control The core assembly and component development of the device have made important breakthroughs, and in-depth research has been carried out on the theory of vehicle control strategy, gas-electric composite braking and energy recovery, and distributed drive coordinated control. Through the development of components, research on key technologies, integration and testing of core systems, two extended/plug-in electric commercial vehicles have been successfully developed: one is an extended-range electric sanitation vehicle, and the other is an extended range/interpolation The electric wheel drive electric bus and obtained the product announcement of the Ministry of Industry and Information Technology.
According to the schedule of the project, at the end of November 2014, the extended-range electric sanitation vehicle needs to go to Hubei Fuyang National Automobile Quality Supervision and Inspection Center for road test. Due to the approaching winter, Qinling Expressway may be blocked due to heavy snow at any time. In order to rush to the schedule, the Rand project team completed the assembly inspection on Friday, and continued to drive through the mountain roads on weekends. After arriving in Hubei, due to the low temperature of the blizzard, the performance of the power battery pack dropped sharply. The members of the project team immediately confirmed the status of the site. After getting in touch with the supplier, everyone was blizzard and after several hours of hard work, the battery pack was carried out. The performance optimization ensures the safe and efficient driving of the vehicle, and also accumulates the processing experience of the power battery pack in the low temperature environment.
After arriving at the Fuyang Test Site, the project team followed the car all the way. After the full load test was completed every day, it was necessary to work overtime to carry out vehicle status statistics, vehicle maintenance and other work, and often work until late at night. Under the joint efforts of the project team members, the vehicle test report was obtained in December last year. All the indicators met the design requirements, and the powertrains and subsystems were in good working condition.
During the development of the extended/plug-in heavy-duty commercial vehicle chassis, RAND technicians published 7 articles in various important publications in the automotive industry, and applied for 9 patents, including the development and power of heavy-duty commercial wheel-side electric drive axles. Battery pack energy management system, (natural) gas-electric range extender matching and control technology, electric vehicle complete vehicle control technology and vehicle controller development, extended/plug-in electric commercial heavy-duty vehicle chassis development and vehicle system integration Technology, extended range/plug-in wheel drive electric bus chassis development and vehicle system integration technology 6 major technical achievements have been applied and verified in real vehicles, providing important ideas and engineering for the development of new energy vehicles in the future. Learn from. It is worth mentioning that the vehicle controller independently developed by RAND's technicians has been used in various models such as pure electric heavy-duty tractors, pure electric sweepers, hybrid city buses, pure electric dock cars, and pure electric mini-cars. Get applied on.
Since the development of the prototype car, the products developed by the 863 project have participated in more than 10 various auto shows including the Western Fair, and have won unanimous praise from provincial and municipal leaders, peers and customers. Recently, the Shaanxi Provincial Department of Industry and Information Technology issued a document to grant the 863 project extended-range electric sanitation trucks to the demonstration operation in Xi'an, and the related technologies will soon be on the municipal sanitation garbage trucks, sprinklers, sweeping vehicles, city buses and other products. widely used.
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