Turbocharger design considerations

Most of the exhaust gas turbocharger has a drain valve , because it is there , we can reduce a small turbocharger supercharging delay while preventing the excessive rotation of the turbine engine at high speed . The exhaust valve is a relief valve that allows the exhaust gas to bypass the turbine blades. Exhaust gas turbocharger pressure relief valve can perceive . If the pressure is too high , the bleed valve would indicate that the turbine exhaust gas is too fast rotation , when a portion of the exhaust gas through the discharge valve of turbine blades , thereby reducing the rotational speed of the turbine blade .(intake manifold)
Some turbochargers used instead of the hydraulic ball bearings to support the turbine shaft . But they are not ordinary ball bearings , but with a high level of precision bearings materials for turbocharger response speed and temperature . The turbine shaft rotates , a frictional force is less than such a ball bear most of the hydraulic turbocharger bearing friction. It also allows the use of smaller , slightly lighter shaft . Such turbochargers accelerate faster and further reduces the turbine delay.(intake manifolds)
Ceramic turbine blade steel turbine blades than most turbochargers used to light. Again, this can quickly accelerate the turbine , the turbine to reduce the delay .
Some engines use two turbochargers of different sizes . A smaller increase faster speed , the turbine reduces the delay , and the larger one can produce more supercharged engine at high rotation speed .
When air is compressed , the temperature rise ; while the air temperature rises , the expansion occurs . Therefore, when the turbocharged air before it enters the engine because the compression has some of the heat expansion is generated . In order to enhance the engine power , so that more air molecules need to enter the cylinder, and does not have to generate more pressure .

Intercooler or charge air cooler is a radiator -like appearance as add-ons , but from both internal and external air intercooler through . Turbine intake air flowing through the cooler line seal , the engine cooling fan blowing cool air from its flow through the external heat sink .
The compressed air from the compressor before entering the engine , it is cooled intercooler will thus further enhance the engine power . This means that if the turbocharger is operating at 337 kPa supercharger intercooler 337 kPa will generate a lower air temperature , the higher the density of the air , the air molecule with a higher temperature than the multi- pressure air .(peugeot turbo)