This article refers to the address: http:// Just as there are countless martial arts in the martial arts novels, the automobile and lakes are also divided into various technical sects. After entering the 21st century, energy conservation and environmental protection have become a main theme of automobile technology development, but how to achieve this goal, different manufacturers have their own idea. Under the pressure of national environmental regulations, pure electric seems to be the ultimate state of automobile development, but before achieving this goal, we continue to rely on fuel for a long time. Therefore, the more realistic problem is not how to please fuel, but how to improve the efficiency of combustion as much as possible. Turbocharging and dual-engine hybrids are no longer new technologies. The major car companies have tried their best to reduce fuel consumption. They have tried their best to do everything. Today we will take stock of the most promising Several technologies. 48V electrical system Today is talking about a way to make the engine more fuel efficient. The first measure seems to have nothing to do with the engine. It is a 48V electrical system. Most of today's engines drive alternators, cooling pumps, oil pumps, and air conditioning compressors that transmit energy from the engine through a conveyor belt. At present, the 12V electrical system generally has a maximum output of 2 to 3 kW, because the engine, chassis, body control and in-vehicle infotainment functions of the car now rely on the 12V electrical system. However, with the introduction of new electronic functions such as semi-automatic and fully automatic driving systems, the 12V electronic architecture has become inadequate. The solution is to use 48V electrical systems in future new vehicles, so that 10kW of power output can be achieved. Support more and more complex and complex electronic functions. So, what does it have to do with the fuel economy of the engine? Of course it has a relationship. The 48V electrical system significantly reduces the engine's additional load and is expected to increase fuel efficiency by up to 10%. In this regard, the Volkswagen Group is in a leading position, its Bentley Timor and Audi SQ7 TDI have adopted 48V electrical system, so that SQ7 TDI can be equipped with an electronic turbocharger. Perhaps in the near future, the 48V electrical system will gradually spread to more mainstream models. In addition, the 48V electrical system can further improve the micro-hybrid system. Mild hybrid, also known as light blending, has been tried by some manufacturers earlier. General Motors is a typical example, but the market performance is not ideal. Now, when it comes to the popularity of 48V electrical systems, engineers are expected to achieve 70% fuel efficiency improvement with the new micro-hybrid system, because of the thinner wiring and lower cost connectors under the 48V electrical architecture. It also provides energy for braking energy recovery, electronic boost boosting and more advanced start-stop functions. New generation engine cylinder shut-off / closed cylinder technology Cylinder deactivation, also known as closed cylinder, means that during the operation of the engine, when the required power of the car is low, part of the cylinder of the engine can be suspended, thereby reducing the overall fuel consumption. The cylinder deactivation technology is no longer new. In the early 1980s, Cadillac developed a two- or four-cylinder automatic stop, but limited to the single-point fuel injection method and simple electronic control. System, this technology did not succeed at the time. Nowadays, closed-cylinder technology has become more and more common, and consumers are becoming more and more accepting it. In the next few years, more and more sensors in the car plus a more mature and complex electronic control system will allow the engine to operate more in non-full cylinder operation. GM is currently working with Delphi to develop more advanced closed-cylinder technology that will allow the V8 engine to operate with a minimum of two cylinders in the future. This technology is expected to reduce fuel consumption by up to 15%. Fuel cell plug mixing system From an environmental point of view, fuel cells are obviously more reasonable than pure electric vehicles. At present, Hyundai, Toyota and other small car companies have put hydrogen fuel cell models into the market, but limited to the cost and supporting facilities, whether this technology can be popularized. Hard to say. However, this does not mean that the fuel cell will not work in the short term. Nearly 10 years ago, Ford introduced a concept car called Airstream, which uses a plug-in hybrid layout to strike a balance between cost and usability. After that, Ford is still on a sharp side. The system was tested. Using a fuel cell as a range-increasing device rather than a direct electric drive source is expected to achieve higher efficiency with zero emissions. The latest news is that Mercedes-Benz recently announced that it will start production of a fuel cell plug-in version of GLC in 2017, called GLC F-Cell. We will wait and see how it performs. Camless engine A little understanding of the operating principle of the engine knows that in most internal combustion engines, the camshaft is an indispensable component that controls the opening and closing of the intake and exhaust valves in each cylinder. However, the camshaft control valve opening and closing has a natural defect that it is not possible to freely adjust the timing of opening and closing of each valve. It's like when we are breathing, when we walk slowly, we have a slower breathing rate. When we run, the breathing rate must be increased to meet the oxygen intake requirement. Most of the engine's intake and exhaust valves can only be opened and closed at one frequency. If each valve is free to choose the opening and closing time, the engine can choose a more appropriate "breathing frequency" under different operating conditions. In order to achieve this, many car companies have made efforts. Variable valve timing (VVT) and variable valve lift (VVL) are two measures, but they still fail to meet the limitations of the camshaft and have limited freedom. . As early as the end of the 1980s, the Lotus Mechanical Engineering Department showed a camless engine on the floor, but it was not mass-produced due to technological development. Nowadays, with the advent of the 48V electrical system, the camshaft-free technology has new development potential. The front-end is the super-running manufacturer Königsegger. It is worth mentioning that Qoros Auto is currently cooperating with Konisig. In the near future, we are expected to see this technology in our new products. Turbine plug-in hybrid technology Waterproof power amplifier cabinet,Solid wood power amplifier cabinet,Power amplifier cabinet,Conventional aviation cabinet,Anti-fall aviation cabinet Shenzhen Jingtu Cabinet Network Equipment Co., LTD , https://www.jingtujigui.com
