History and advantages of Turbocharger Accessories

Who is the inventor of the turbo booster? It is generally acknowledged that the Swiss engineer biscy applied for the patent in 1905. At that time, it was mainly used in aircraft and tank engines. It was not until 1961 that General Motors (GM) tentatively installed the turbocharger on some of its models. The 1970s became a turning point for turbochargers, with the advent of the Porsche 911 with a supercharging engine. But Saab Saab of Sweden is the only company that makes turbocharging technology shine. Saab99, which was launched in 1977, spread the turbocharging skills more widely. However, the turbocharger casing was only installed on the gasoline engine of a car at that time. It was not until the mid-1980s that European and American truck manufacturers applied their turbocharging skills to their diesel engines, and it was only in this decade that domestic cars began to gradually become popular with turbochargers.
1. Improve engine power. Under the condition of constant engine displacement, the engine can be injected more oil by adding intake density, and then the engine power can be improved. The engine power and torque after the installation of turbocharger casing should be increased by 20% ~ 30%. On the contrary, under the same power output requirements, it can lower the cylinder diameter of the engine and reduce the volume and weight of the engine.
2. Improve engine emissions. After improving the combustion efficiency of the engine, the emission of harmful components such as particulates and nitrogen oxides in engine exhaust gas is reduced. It is an indispensable configuration for diesel engines to reach Euro 2 or above emission standards.
The earliest patent application for Turbocharger Accessories was in 1905. Dr. Alfred Buchi of Sulzer brothers research and development company applied for the patent of the first turbocharger - power driven axial turbocharger. However, due to the industrial level at that time, Dr. Buchi did not produce the first efficient turbocharger product. In 1911, it was started in Winterthur turbocharger factory in Switzerland, and in 1915, a prototype aircraft engine supercharger was manufactured, which was driven by engine exhaust gas. The primary intention was to overcome the negative impact of low air at high altitude on power. During World War II, a supercharger made by General Electric (GE) lifted the aircraft to 10000 meters.
After forced supercharging, the temperature and pressure of gasoline engine will be increased during compression and burning, and deflagration tends to be added. In addition, the exhaust temperature of gasoline engine is higher than that of diesel engine, and the method of increasing valve stack angle (when inlet and exhaust valves are opened together) is not suitable to strengthen exhaust cooling. Reducing the compression ratio will result in insufficient combustion. What's more, the speed of gasoline engine is higher than that of diesel engine, and the air flow rate changes greatly, so the response lag of turbocharger is very simple. Aiming at a series of problems in the use of turbochargers in gasoline engines, engineers have made targeted improvements one by one, so that gasoline engines can also use exhaust gas turbochargers.
After the engine works at high speed for a long time, it can't stop immediately. When the engine is working, a part of the oil is supplied to the turbocharger rotor bearing, which is smooth and used for cooling. After the running engine stops suddenly, the oil pressure drops rapidly to zero, and the high temperature of the turbo part of the turbocharger is transferred to the middle, and the heat in the bearing support shell can not be quickly taken away. However, the turbocharger rotor is still rotating at high speed under the inertial effect. Therefore, if the engine is shut down suddenly, the oil retained in the turbocharger will overheat and damage the bearing and Shaft. In particular, it is necessary to avoid sudden flameout after slamming the accelerator.