The tragedy in Zhengning County, Qingyang, Gansu shocked the whole country. The miserable scene at the scene of the accident froze the hearts of people. When the reporter saw several pairs of children's shoes that had been stained with blood scattered on the side, the words “vehicle safety” appeared before the eyes. .

A vigorous investigation of school bus and security movements was immediately launched throughout the country, and there was a constant stream of information on overloaded vehicles and the suspension of unsafe vehicles. In the past month alone, the Guangzhou Traffic Police Department has cumulatively inspected more than 36,000 school buses and investigated more than 1,100 violations of school buses; Chongqing will eliminate all school buses by the end of this year, and launches 3,000 vehicles that are said to be the most in the country. The safe school bus; Tianjin Education Commission also issued an emergency notice, school-by-school investigation by the end of the investigation, if necessary, will take measures to stop.

Several recent major traffic accidents all involved illegal school buses without exception, and the most mentioned are the long American school buses with yellow bodies. Regardless of on-duty driver technology, vehicle safety is absolutely a top priority. Safety, divided into active safety and passive safety in the automotive field. Active safety naturally includes the stability and maneuverability of the vehicle. Passive safety, on the other hand, has the impact protection of the vehicle in the event of an accident. Compared with the safety air curtains and sunken engines of high-end cars, we can't demand all of them to be applied to large vehicles, but it is feasible to design a buffer energy-absorbing zone at least at the front of the car.

As we all know, the original school bus was refitted from the chassis of the truck. The long-head truck was considered to be the safest vehicle at that time. The long front and strong chassis were telling the world that the safety of the children was To protect.

Turning on the thick domestic accident files, many of the tragic life-threatening cases involved flat-head truck overloads, violent collisions, and uncontrolled rollovers. Just talking about transportation costs and benefits, the dorado race has become the rule of China's road transportation. Under the supervision of the traffic and transportation departments, it is obvious that reducing the driver’s fatigue, reducing the vehicle’s load, and improving the active safety of the vehicle are the obvious. Still can not prevent the accident, after all, accidents can not be avoided, so simple and effective to increase the passive safety of trucks, has become a hot topic. At this point, the long truck again entered the sight of people.

Long head trucks carry too much memory

In 1953, the "K series" produced by Navistar Corporation of the United States was introduced to China in 1953. The first vehicle in China, the Liberation CA10, was also developed based on this model. The Navistar "K" series has far-reaching influence in China, and even the trucks of most of the early domestic brands have the shadow of Navistar. China’s second-generation trucks, represented by Dongfeng 140 and Liberation 141, are also the classics of China’s truck history, and are also long cars. However, these two generations of trucks are all medium-sized trucks and gradually fail to meet the high-speed development of the Chinese transportation industry. Due to the subsequent introduction of the Steyr trucks and policy restrictions, long trucks were gradually abandoned, and companies rushed to build high-quality flat trucks.

With economic development, natural road transport will also develop along with it. Natural disasters will naturally increase. If there are more long-heavy trucks on the road, in times of crisis, the safety of truck drivers can be guaranteed, and on the other hand, the casualties of the other vehicles can be reduced. Rate, because of the impact of the space, the collision impact of the front and rear cars will certainly reduce a lot. Today's safest school bus design philosophy mostly incorporates Western culture. Under the premise of guaranteeing light weight, the company will improve the local weak areas, eliminate stress concentration, and increase the strength of the entire vehicle. Adopting the European short-stemmed vehicle structure, the collision buffer zone and the crash energy absorption zone at the front of the front end are longer than those of the flat head, which is more conducive to ensuring the collision space for the occupants. The same applies to passenger cars, trucks, and long-haul trucks that incorporate passive safety can indeed increase passengers' hopes of surviving at the moment of the accident.

The innate advantages of long trucks

Although the safety of current flat-head trucks is already very high, compared with long trucks, flat-head trucks still have a congenitally deficient design. After all, the energy-capital crumple zone of a few meters long is not flat, and the flat-bed truck is very The high cab is less stable in crosswinds or sharp turns and indirectly increases the probability of an accident.

In the current situation of increasing logistics speed in China, truck companies began to carry out technology research and development and vehicle renewal for themselves. Flat-head trucks have gradually peeled off old Steyr faces, but no matter how innovative they are, flat-head trucks are booming. From a safety or fuel economy point of view, long trucks still have a considerable advantage. At the moment, the long trucks of the FAW Liberation Long Head and the Dongfeng Liuqi “Longka” have all upgraded the old generation of long tractors, aiming to lead the development of long heavy trucks. Both the performance configuration and appearance are superior to those of the older generation long trucks, which have the advantages of high safety factor, fuel economy, light weight, and large cab space. In addition, China National Heavy Duty Trucks, which has the MAN gene, are currently publicizing new types of cargoes and special-purpose vehicle products. They are called "Deterrence." Judging from the local characteristics of the cab, the heavy-duty heavy-duty truck was built on the basis of the HOWO A7 low-floor extended cab. The headlights utilize the headlight assembly of the HOWO A7, and the shape of the intake grill also continues the HOWO A7 style. The long-heavy heavy-duty truck has flat-topped and high-top cab options. At the 2011 Shanghai Auto Show, a Tianlong long heavy truck launched by Dongfeng Commercial Vehicle detonated the entire venue, and the industry’s expectation for long heavy trucks was once again lit. Although Dongfeng's long head concept heavy truck is still called Tianlong, it can be clearly seen that the front half of the cab is a narrow body of the Tianjin D530 cab, and the rear half of the cab and the bumper are wide-body Tianlong D310 cabs. Although Dongfeng Tianlong's concept of long head combined the two cabs together, it did not have a cohesive feel and the styling was well coordinated. This shows that China's long trucks will soon compete with flat-bottom models.

Due to the national conditions, the long truck road is still far away

Most trucks in China are flat-head heavy trucks, while trucks in the Americas mostly use long head designs and have better safety performance. According to statistics, at present, Americans have an average road area of ​​more than 500 square meters, and Japan has an average of about 200 square meters per capita, while China's per capita road area is about 10 square meters. In addition, China’s traffic conditions are far more complicated than those of the United States, and the requirements for vehicle flexibility are higher. From this point of view, the long truck has a poor visibility and a large turning radius. And national regulations limit the length of the vehicle. If the front part grows by 1 meter, it means that the rear trunk will pull a few cubic meters less. Therefore, from a technical point of view, the flat car has a higher utilization rate. In the United States, it was stipulated that only length restrictions were imposed on the cargo compartment, not on the front of the vehicle. This directly led to the death of the long truck in China. Therefore, in order to save loading space, Chinese truck companies have adopted short and refined standards in their research and development of the front end, resulting in the formation of a flat-head truck in the world.

At the same time, the high price of imported long heavy trucks is also one of the important reasons that hinder its rapid development in the Chinese market. The price of imported heavy-duty trucks such as Scania, Duff, and Navistar is frequently at or above 800,000 yuan. It is difficult for average Chinese consumers to bear such expensive prices. At present, the demand for long heavy trucks in the Chinese market is narrow, mainly concentrated in some special sub-regional markets, such as some large logistics groups and individual special industries. Long-heavy trucks need to rely on the market cultivation of manufacturers in order to develop in China. However, China's highway management system also needs to be thoroughly improved. Perhaps the reference to the regulatory standards of American trucks can make the spring of long trucks come.