The engine assembly, also known as the engine, is a machine that can convert one form of energy into another more useful form of energy, usually converting chemical energy into mechanical energy The electric motor, which converts electrical energy into machine energy, is sometimes applicable to both power generation devices and the entire machine including power devices. For example, gasoline engines, aviation engines, and automotive engines generally obtain kinetic energy through internal combustion of gasoline (diesel), so automotive engines are internal combustion engines. According to the different fuels used, they can be divided into gasoline engines and diesel engines. Gasoline engines and diesel engines have their own characteristics; Gasoline engines have high rotational speed, low quality, low noise, easy starting, and low manufacturing costs; Diesel engines have a high compression ratio, high thermal efficiency, and much better emission and economic performance than gasoline engines. Secondly, according to the piston motion mode, piston type internal combustion engines can be divided into two types: reciprocating piston type and rotary piston type. The former piston moves back and forth in a straight line in the cylinder, while the latter piston rotates in the cylinder. Thirdly, according to the number of cylinders, it can be divided into single cylinder engines and multi cylinder engines. Engines with only one cylinder are called single cylinder engines; An engine with two or more cylinders is called a multi cylinder engine. Modern car engines often use three cylinder, four cylinder, six cylinder, and eight cylinder engines. According to the arrangement of cylinders, they can be divided into single row, double row, and three row engines. The cylinders of a single row engine are arranged in a row, usually vertically, but sometimes they are arranged in a tilted or even horizontal position to reduce height. A double row engine arranges the cylinders in two rows, The angle between two columns)
The engine assembly includes a cylinder block, flywheel housing, transmission gear compartment, water pump, fan, transmission mechanism, timing gear, intermediate gear, filter, oil pan, oil pump, V-belt, crankshaft, connecting rod, piston, flywheel, etc
The Audi TT is a sports car developed by Audi, which was first launched in 1998. As a sports sedan, the TT model has achieved great success in the market with its almost identical beautiful appearance and excellent performance to the concept car version. In the early stages of the first generation, some car owners complained about unstable high-speed turning and accidents. Audi adjusted the suspension system of the TT and added a rear spoiler version to the rear of the car, reducing the lift at the rear of the Audi TT from 148 pounds to 53 pounds at a speed of 125 miles per hour, The 64 pound rear lift of the BMW Z3 Coupe and the 68 pound Porsche Boxster, as well as the 104 pound Mercedes SLK, are lower than those of the same period at the same speed. The Audi TT is a pure sports car. There are three models sold in China, namely the TT Coupe 1.8t, TT 2.0TSI, and TT 3.2quattro convertible (soft top). Audi continues to launch a series of completely new cars, from A4.A6 to the current A8 and TT. [2] Audi TT's competitors include BMW X1, Mercedes SLK, etc
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