It is a last resort for luxury brands in Europe to adopt 48V light mixing one after another, because the European Union has more and more strict requirements on automobile emissions, and promulgated regulations on 20 13. By 2020, the fuel consumption per 100 kilometers will be reduced to 4L, and the carbon dioxide emission per kilometer will be as low as 95g.
Although 2020 has arrived, almost no luxury brand fuel vehicles have reached this standard, but no one dares to ignore such a hard rule, research and development must be done, even if it is not up to standard at present, even if it is just cosmetic surgery. ?
(BYD's blade battery)
There are only two roads ahead, pure electric or traditional hybrid. However, the development of battery technology and pure electric vehicles in Europe is not satisfactory. In this respect, BYD in China has done better than them, which is not feasible for European giants. On the other hand, almost all the patents of traditional hybrid technology are in the hands of the automobile giant Toyota. Paying Toyota is not good for face and money.
Therefore, a small road, 48V light hybrid power system, has been put forward from many schemes, because this scheme is more feasible than pure electric vehicles and lower in cost than traditional hybrid power.
(Audi A8' s 48V light mixing system)
According to the data of Bosch and Valeo, the main suppliers of 48V optical hybrid system, the cost of using 48V optical hybrid system is only 30% of that of traditional hybrid power system, and the structure is simple, so the 48V optical hybrid system can be installed for engines and vehicles without complicated modification.
In addition, the 48V optical mixing system has many advantages, such as directly providing power for air-conditioning compressor, main steering pump, water pump and oil pump, and vehicles equipped with automatic start-stop can also enjoy air conditioning when the engine is turned off and waiting for a red light.
(Mercedes M256 engine)
At present, the12v battery carried by most cars can't support high-power appliances such as air conditioners and compressors, so the air conditioner can only be suspended after the engine is automatically started and stopped. This reminds me of the brand-new Audi A4L. What does it mean to equip 12V mixed light?
(Mercedes ISG Automobile Company)
From the physical knowledge, we know that compared with the traditional 12V voltage, 48V voltage can reduce the size and quality of cables and electrical components, and the transmission loss of power system is also smaller, which provides support for the lightweight of the engine and reduces unnecessary losses. At the same time, the 48V light mixing system of Mercedes-Benz and other brands also integrates the braking energy recovery system, which converts excess energy into electric energy and stores it, thus improving the energy utilization efficiency.
(Bogwana 48V electronic turbocharger)
In terms of power, the 48V light mixing system can assist the engine's power output, improve the smoothness of starting taxi, reduce fuel consumption by 14- 17%, and greatly improve fuel economy. In addition, the 48V light mixing system can also provide energy for the electric turbocharger to drive the turbine to work in the low engine speed range, thus eliminating the turbine time lag.
With the support of economy, feasibility and many advantages, the 48V mixed light system was naturally put on the models of European brands and began to affect the whole automobile industry. Not only BMW, Volkswagen, Kia and other car companies have followed suit, but also domestic independent brands such as Changan, Chery and BAIC have begun to launch corresponding plans, thus making this system popular and no longer exclusive to luxury cars. Soon, everyone can enjoy 48 volts of light mixing.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.