Mechanical pressurization  (Dieselpartsworld) 2016-01-19    

Mechanical pressurization
Representative models: Mercedes Benz C200K, Land Rover Range Rover 4.2 supercharged version
Advantages: no lag or lead, the power output is more fluid
Disadvantages: consumption of some of the engine power, resulting in low efficiency is not high
Turbo and turbo
Representative models: Volkswagen GolfGT1.4TSI
Advantages: large engine output power, low fuel consumption rate, suitable for all conditions
Disadvantages: the structure is complex, the cost is too high
The traditional turbo supercharger and there are unsatisfactory places. Mechanical boost is helpful to low speed torque output, but the power output is limited at high speed. While the exhaust turbo charging at high speed has a strong power output, but the low speed is not. The designers of the engine then imagine the combination of mechanical boost and turbocharger to solve the problem of two kinds of technology, and solve the problem of low speed torque output and high speed power output. This technique is used in the 1985 blue Letizia S4 car, and get a great success. However, due to the complex structure of the dual pressure system, it is not easy to match with the engine, the manufacturing requirements for the engine parts are also higher, so at present only in the individual models to achieve the application.
Non mainstream boost system
Nitrogen pressurization
Nitrogen pressurization and turbocharged and supercharged as, in order to increase the oxygen content in engine mixed gas and the combustion efficiency is improved to increase horsepower, different is nitrogen pressurization not by raising air density efficiently, but nitrous oxide (N2O) forced irrigation brought into engine thereby creating more high combustion value, increase the output. Turbo compressor is the air, the inexhaustible supply of air, but the nitrogen gas is stored in a pressurized cylinder, a limited number of. And based on security considerations, the general proposal is best not to use more than 1 minutes. So the nitrogen turbocharger can only provide a short burst of power, but this kind of explosive force is indeed amazing.
Air wave pressure
Pulse gas wave forcing air compression using high pressure exhaust gas. This kind of system has good performance and good acceleration. But the noise is too large, and the whole device is relatively bulky, not suitable for installation in the smaller car inside.