What are the engine intake supercharges
air pressure booster system: the use of high-pressure exhaust gas pulse forced air compression. This system has better pressurization performance, good acceleration, but the whole device is relatively cumbersome, not suitable for installation in the smaller car inside.
the composite booster system: that is, exhaust turbocharged and mechanical supercharger and use, mechanical booster will help low torque when the torque output, but the high speed power output is limited; and exhaust turbocharged at high speed has a strong Of the power output, but the low speed when the powerless. Engine designers then envisioned the combination of mechanical supercharging and turbocharging to solve the problems of both technologies while addressing low-speed torque and high-speed power output problems. This device is used on high-power diesel engines, gasoline engine with double pressurization system (composite booster system) models are still relatively small, the public 1.4 TSI engine (this engine takes into account the low-speed torque output and high-speed power output. At the low speed, most of the supercharging pressure is provided by the mechanical booster, and the two turbochargers simultaneously provide the boost pressure at 1500 rpm. With the increase in speed, the turbocharger makes the engine more At the same time, the supercharging pressure of the mechanical supercharger is gradually reduced, and the mechanical supercharger is controlled by the electromagnetic clutch, which is assembled with the pump, which provides all the supercharging pressure by the turbocharger when the speed exceeds 3500 rpm, At this point the mechanical supercharger in the role of electromagnetic clutch completely separate from the engine to prevent the consumption of engine power) using the system. Its engine output power, low fuel consumption, low noise, but the structure is too complex, high technical content, maintenance is not easy, it is difficult to popularize.
exhaust turbocharging system: This is what we usually the most common turbocharger, supercharger and engine without any mechanical contact, in fact, is an air compressor, through the compressed air to increase the intake volume. It is the use of the engine exhaust gas inertia momentum to promote the turbine chamber turbine, turbine and drive the coaxial impeller, the impeller pressure sent by the air filter pipe air, so that pressurized into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the speed of the chaos is also faster, impeller to compress more air into the cylinder, the air pressure and density can burn more fuel, the corresponding increase in the amount of fuel can increase the engine Of the output power. In general, the installation of exhaust turbocharger after the engine power and torque to increase by 20% -30%. But the exhaust turbocharger technology also has its place to pay attention to, that is, the pump wheel and the turbine connected by a shaft, that is, the rotor, the engine exhaust gas drive pump wheel, pump wheel drive turbine rotation, turbine rotation to the intake System pressurization. The supercharger is mounted on the exhaust side of the engine so that the operating temperature of the supercharger is high and the speed of the rotor during operation is very high, reaching tens of thousands of turns per minute, such a high speed and temperature Making the common mechanical needle roller or ball bearings can not work for the rotor, so the turbocharger commonly used full-floating bearings, from the oil to lubricate, as well as coolant for the supercharger cooling.
the mechanical pressurization system: This device is installed on the engine and the belt connected with the engine crankshaft, from the engine output shaft to drive the power to drive the turbocharger rotor rotation, which will blow the air into the air into the Qi Road. The advantage is that the turbine speed and engine are the same, so there is no hysteresis, the power output is very smooth. But because of the engine mounted inside the shaft, so still consume part of the power, pressurized out of the effect is not high.
