"According to the most optimistic estimate, the global hybrid vehicle market in the second decade of the 21st century has reached a scale of one million units, which is still a very small proportion of the total automobile production. If oil prices rise sharply, or if there is traffic congestion, Metropolises with stop-and-go vehicles will clearly demonstrate their advantages in the power of science and technology."
People may not understand what the "science and technology power" mentioned here is, but if you participate in the interactive discussion of the entire process, you will know that the advanced technologies in the current traditional power can be combined to make a big difference. Energy-saving advantages. Therefore, don’t underestimate the technological contributions of the majority of people driving traditional cars.
At the 2014 Automotive Power Technology Development Forum hosted by China Netcom in Beijing recently, a number of industry experts expressed similar views: Electric vehicles should be vigorously researched and improved, but electric vehicle technology is not yet fully mature and clean power is accounted for. At the current small stage, existing automotive technologies have basically met the current requirements for fuel consumption limits and emission regulations. Taking the start-stop technology as an example, “Recovering idling, braking, coasting, and other wasted energy and converting it into kinetic energy in the form of automobiles will be applied to all energy conservation, emission reduction and new energy technologies in the 21st century. "This is the opinion of Li Anding, president of China Netcom."
Turbo start and stop: traditional realistic choice
At present, with the continuous development of automotive technology, power technology is no longer the world of large-displacement engines. The combination of engine miniaturization and automatic start-stop technology formed by turbocharging has become a reality for many automotive manufacturers. consensus. Dongfeng Peugeot, which participates in and supports this forum, is a typical representative of this combination technology.
Dongfeng Peugeot general manager Li Haigang introduced from the Dongfeng Peugeot "TSTT" high-efficiency power combination, that is, THP turbocharged direct injection technology, CVVT continuously variable timing technology and STOP & START engine intelligent start-stop system, is a traditional power Technology is one of the most effective energy-saving technologies. From the perspective of a 1.2THP turbocharged direct injection engine of Peugeot, its maximum power is 100 kilowatts and the maximum torque is 230 Nm. It has in-cylinder direct injection and multi-injection technologies, as well as exhaust manifold coupling technology. It also has D. - CVVT double continuous variable intake and exhaust timing system, smooth and reliable operation, is currently a realistic choice to achieve 100 kilometers of 5.0 liters of fuel consumption.
In the face of rising tides of demand for innovative power from the market and consumers, how to improve the fuel economy of vehicles and take into account the superiority of driving performance are issues that automobile manufacturers need to implement. In the present, Xu Changming, director of the Information Resources Development Department of the National Information Center, believes that the use of automatic start-stop technology can effectively reduce exhaust emissions and increase turbocharger technology. The use of the two conforms to the current trend of energy conservation and environmental protection.
Plug-in hybrid should also refine the indicators
Of course, in the current situation where various technologies are highly competitive and somewhat mixed, some experts propose that a domestically-made plug-in hybrid vehicle is equipped with a switch that can turn off the power battery so that only the fuel engine is used to drive the vehicle. Drilling into the gaps in national policies and technologies not only earned the corresponding subsidies, but also made it easy to acquire qualified new-energy vehicles such as Beijing's restricted cities.
In response to this, a reporter from the China Industry News consulted Professor Song Jian, executive vice president of the Automotive Engineering Development Research Institute of Tsinghua University. He told reporters that the plug-in hybrid vehicle advocated by the government should be an extension program. Hybrid power, which means that the fuel engine can only be used to generate electricity to power the battery, cannot directly drive the vehicle. The current market situation is that the relevant departments do not specify the detailed definition of plug-in hybrid power. Some parallel-connected plug-in hybrids can receive the same subsidies and other benefits as mentioned above. In the process of use, it is possible to use only the fuel engine.
In fact, the hybrid engine should be in the best condition to use the average output power. Wang Binggang, leader of the supervision team of major new energy vehicle projects, believes that in order to obtain subsidies for new energy vehicles provided by the state, some enterprises will always design the mileage of pure electric vehicles to be greater than 50 kilometers. The result of this will be that the vehicle parameters will not Very reasonable. According to data statistics made by the Automotive Lightweight Technology Innovation Strategic Alliance, it can be found that the mature hybrid vehicle developed on the same platform has a ratio of the body trimming quality to that of an ordinary car within 1.1, and the corresponding body weight ratio in China. However, it is generally above 1.3. Wang Binggang believes that the weight and cost of the original deep hybrid vehicles are already higher than those of the fuel vehicles. Nowadays, with so many batteries added, the quality and cost of the hybrid vehicles are unreasonable.
Start-up and stop technology should relieve people's doubts with greater applicability
Highly environmental-friendly, highly fuel-efficient, without affecting vehicle performance and considering the use of the environment is the development trend of automotive products in the future. Xu Changming believes that China's atmospheric environmental pollution is very serious, and the eastern and first-tier cities are even worse, far exceeding environmental carrying capacity.
Under such circumstances, once major cities have introduced "idling speeds" similar to foreign ones, the start-stop technology that can solve the idling problem is expected to receive widespread attention and large-area applications.
For example, in some pilot countries and regions, the “Idle Speeding†penalty standard, London, England, is punishable by a fine of 20 pounds for motor vehicles that do not turn off at idle for long periods of time. The future plan is to increase it to 70 to 120 pounds; Hong Kong, China, In addition to the exemptions such as buses and hybrid vehicles, the motor vehicle must be turned off after 3 minutes of idle speed, otherwise it will be fixed at a fine of HK$320; the regulations in Taiwan, China are also similar, the vehicle parking is not stalled for more than 3 minutes, and the motorcycle is punished with NT$1,500. , Small cars and large cars were fined TWD 3,000 and TWD 5,000, respectively.
At present, although the start-stop technology has a relatively large energy-saving effect, its maturity is in line with the environmental concerns of consumers in China. For example, some consumers are worried that frequent start-stop will affect the life of the engine, and will also have negative impact on the work of key components such as turbochargers; some consumers worry that frequent start-stop will affect the life of the battery; some consumers believe that frequent ignition , Extinguishment will make the driver bored, start up speed will have a sense of frustration will think that the transmission is faulty. Xu Changming stated that if it is to achieve a high degree of popularity in the market, the start-stop technology must also use actual capabilities to answer consumers' various concerns.
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