Commercial car news reporters recently learned that drafts of the "Energy-saving and New Energy Vehicle Technology Policy" formulated by the relevant state departments have begun to solicit opinions. It is understood that this policy mainly involves the technical standards for traditional car energy conservation, including new energy vehicle technology standards such as electric vehicles. Zhang Shulin, director advisor of the China Automotive Technology and Research Center, said: "The "policy" should give top priority to energy conservation in traditional automobiles, and put energy saving technologies in an important position." Zhang Xiaoji, chairman of the China Society of Automotive Engineers, also said that development should not be emphasized now. New energy vehicles have neglected or abandoned the pursuit of traditional automotive energy-saving and environmental protection technologies.

For the bus industry, although new energy buses are already operating in some cities, it will take a long time before they can be used in large quantities. Therefore, the realization of energy-saving and emission reduction on traditional passenger coaches is still one of the most important considerations for bus companies.

Wang Chinpu, head of the New Energy Engineering Department of Zhongtong Bus, said: “Our goal is to save three liters of oil for a hundred kilometers of a car. Specifically, the body is light-weighted first, and the energy saving of each car should reach 300-500 kilograms. The cost savings is about RMB 2,000; followed by upgrading the matching capability of the powertrain system to optimize engine, transmission, axle, and chassis technologies; and thirdly, adopting new technologies such as engine thermal management technology, using electronic fans, energy-saving air conditioners, and using engines. Post-treatment exhaust heating provides warmth in the winter cabin."

The Zhongtong LCK6120GT 12m bus adopts the undercarriage type full load-carrying body. Its self-weight is reduced by 2.7 tons compared to the same model, and it can ride 112 people. By selecting an engine suitable for the operating conditions of the bus, the vehicle is light and large. Province, at the same time, the vehicle cost is equivalent to the traditional model.

Hager also focuses on adopting new technologies and new materials to achieve energy conservation and emission reductions. Chen Lijian, product manager of Higer Technology Center, believes that the development of new energy vehicles is still in its infancy and no results can be seen at present. Therefore, it is very urgent to tap the potential of energy conservation in traditional cars. Chen Lijian said: “In the traditional passenger car, our goal is to save 3% to 5%. Before the car's front face out of consideration for rapid market changes, using glass steel, strictly speaking, a good glass steel should be light However, due to factors such as price constraints, the actual use of fiberglass is rather heavy.In this case, we changed the front and rear of the car into steel stamping, so that both reduced the weight, before and after the product The consistency of Wai has also improved."

In terms of energy-saving effect, different models, the effect is not the same. Chen Lijian said: “The fuel economy of large buses is even more obvious. Small passenger cars have to do more work to reduce their weight. For example, the 8m bus and the 9m bus are almost the same, with 9 tons on the rear axle. The front axle must be more than 3.5 tons, so large passenger cars and small passenger cars are very close in terms of assembly weight. Such a small passenger car weighs more per meter than a large passenger car, and it is relatively difficult to lose weight."

“Next, we must also optimize vehicle matching. New assembly products continue to come out. We will continue to improve the overall assembly optimization and match work; at the same time, further reduce weight; the other is to adopt new materials on the chassis and body, such as Aluminum rims; in addition, some structural improvements will be made.” Chen Lijian said.

As an engine company, Yuchai is also actively involved in the work of vehicle energy-saving and emission reduction. According to Liang Feng, technical engineer of Yuchai Engineering Research Institute responsible for electric control, “For the engine body, we mainly optimized and matched electronic control, high-pressure injection, supercharger, and intake vortex to achieve a very low initial emission. At the same time, the fuel economy meets the customer's needs, and some nitrogen oxides and particulate matter cannot be eliminated by the engine body, so we purify it through post-processing technology.The SCR post-processing controller we use on the National IV technical route is Yuchai's self-developed products currently use most of Bosch and Delphi's products in the country, and their reason for doing SCR is because the foreign brands' asking price is relatively high, and the country III to country IV have increased the cost of more than 20,000 yuan. After mastering this technology, prices can drop by more than 50%."