Introduction of the hottest Audi W12 new engine

Introduction to Audi W12 new engine

in the history of automobile, there have been examples of W-type design engine. As early as the 1920s, someone had designed the legendary "teardrop" shaped car. The designer of the car used 3 × 2 arrange the 6-cylinder engine. A few years later, a car with a displacement of 24L and a power of 370kW powered by W12 engine for aircraft appeared. Three people have driven this car to set a world record

70 years ago, that is, in the autumn of 1931, hochs took the lead in designing a 12 cylinder engine for mass production, which became a milestone in the history of German automobile development. Hochs later became one of the origins of the Audi brand. It once installed a V12 engine in a convertible, which, like the new W12, is a 6L engine

Audi is one of the manufacturers currently manufacturing engines with 12 cylinders in double V-type or W-type series configuration. The design principle of W-type engine has very remarkable characteristics: Although there are many cylinders and large displacement, the volume of W12 new engine is as large as that of V8 model, but much smaller than that of traditional V12 model

features of W12 new engine

compared with previous technologies, the new Audi 12 cylinder engine has incomparable advantages. It has compact structure, strong power and light weight. Because the length of this engine is only 513mm and the width is 690mm, it is installed in the front of the car and can be combined with the four-wheel drive system. However, other types of 12 cylinder engines can only match the rear wheel drive system because of their large size. Because there is not enough space under the engine in front of the car to accommodate the front wheel drive components

the compact design of the new W12 engine, coupled with the use of light metal materials such as aluminum and mirrors, makes this 12 cylinder engine have another advantage, which is very light weight. The weight of Audi A8 l6.0 Quattro car has been unprecedentedly reduced to 1980kg due to the use of W12 engine, which is lower than that of all other models. The weight that the car needs to accelerate per horsepower is only 4.7kg, which can compete with high-performance sports cars

compared with previous designs, this engine is no longer a classic W12 engine, because it does not use a three row separation configuration, but places three connecting rods on the same crankshaft pin. This new 12 cylinder engine jointly developed by Audi and Volkswagen is really different

if you pay attention to the cylinder arrangement of the engine, you will find that the machine is made of two groups of ultra small V6 assemblies. Each group has six cylinders, which largely determines the 15 ° arrangement of the use of this kind of plastic and rubber. This offset arrangement combines the advantages of the classic V6 4-cylinder engine, while its width and length are reduced to a minimum

another advantage of connecting the two rows of cylinders into 72 ° is that the height of the engine is significantly reduced, which means that the front-end contour of the car can be designed to be very flat and more streamlined. Another advantage is that it brings a unique dynamic to high-end cars, which may be what people most hope for

the core component of W12 engine is the crankshaft transmission with seven bearings, which weighs only 20.5kg. The crankshaft pin is in an offset configuration, which can maintain a constant ignition sequence like the V6 engine. The overall rigidity of this engine is also unusual. The comfort brought by its excellent vibration resistance even exceeds the expected level of the 12 cylinder engine

dry lubrication system

in order to ensure extraordinary performance, Audi W12 engine adopts dry lubrication system. The greatest advantage of the dry lubrication system is that it can provide lubricating oil to the engine in the best way even under the condition of high lateral acceleration. Unlike ordinary wet lubrication systems, the oil pump supplies lubricating oil to the engine from a separate oil tank. This method is more convenient to achieve the optimal design than the ordinary method

the lubricating oil tank of Audi W12 engine is located behind the right headlamp and is connected to the engine through two hoses. The oil pump is driven by a chain directly connected to the crankshaft. The water cooling system on the left side of the engine can ensure sufficient cooling of the lubricating oil. This system is rarely used in mass-produced cars, and can only be used in high-end sports cars

optimize the design to reduce exhaust emissions

the double overhead camshaft on each cylinder row is responsible for controlling the valve action. The camshaft is driven by the same chain and operates two inlet valves and two exhaust valves of each cylinder through roller cam followers with low friction coefficient. This design principle helps to significantly reduce fuel consumption. The adjustment range of the variable valve timing device is very wide, with 52 ° for the inlet valve and 22 ° for the exhaust valve. This means that the best valve opening time can be achieved in the whole engine speed range, and at the same time, good idle emission can be achieved, the emission of incomplete combustion particles can be reduced, and sufficient torque can be maintained in the whole speed range

the mixing of oil and gas is completed by Bosch Motronic me7.1.1 electronic sequential fuel injection system. The device includes electronic valve control, hot film air flow meter and variable air-fuel ratio control. Four knock sensors can accurately detect the cylinder that produces knock

the exhaust emission control of the engine mainly depends on four three-way catalytic converters installed near the engine and two main catalytic converters installed in the muffler. Eight oxygen sensors with automatic heating can continuously monitor the exhaust emissions. Therefore, such a powerful engine can easily meet the requirements of European standard III for exhaust emissions

12 cylinder audio features worthy of the name

there is no doubt that the charm of the 12 cylinder engine lies largely in its special acoustic quality. Therefore, these special acoustic requirements are also paid great attention to in the development process

this requirement shows that it should have excellent and abnormally low vibration quality at idle speed, especially in the process of partial load acceleration and very low noise level at constant speed. At the same time, acoustic engineers have designed a very dynamic, powerful and elegant audio mode for the engine under partial load acceleration. This distinctive audio design integrates the highest acoustic quality and warm emotion, which are two box type and three box type respectively, and has become a typical feature showing the excellent overall performance of the vehicle

the basis for the above excellent acoustic quality is that the engine can run very smoothly, and the surface gloss of the later products decreases with the increase of the amount of filler, which is also attributed to the following components: the crankshaft and camshaft drive system with the best dynamic design, as well as the connecting pieces of the crankcase and transmission mechanism with special rigidity. Finally, it is also due to the careful acoustic fine-tuning treatment of the engine by the design engineer, which makes the assembly of the intake duct, exhaust system and these components achieve a perfect combination

as the core component of the elongated Audi A8, the mainstream public opinion in the new Hong Kong society also hopes that the Legislative Council can pass the universal suffrage bill. The 12 cylinder engine has strong power, distinct characteristics and vitality. This quality makes the flagship A8 sedan a symbol of Audi's design concept. (end)