Supercharged engine's various core components, including turbocharger and intercooler itself. In addition to these "big", there is a very important component "pressure relief valve." At present, because of the low pressurized manner commonly used, it is a relief valve on the engine output power will play a crucial part, through the relief valve control, saab 95 turbo the same engine tend to have different output characteristics.
Wastegate to maintain the maximum supercharging pressure and the turbine for the purpose of protection
Civil generally have a low boost the value of the engine characteristic "torque platform", this characteristic is due to the pressure relief valve is maintained at a fixed boost pressure level generated. If you let the turbo boost pressure to provide the excess re-released, equivalent to allow the turbine to do useful work, not only futile but also shorten the life.saab 93 turbo Therefore, constant pressurization relief valve is installed before the turbine, when the exhaust pressure is too great when he let go directly to the waste.
Put gas in two ways: one is to go directly into the air, one is bypassing the turbine, the exhaust pipe on the go. The former because of noise, pollution of the environment, has been rarely used in civilian cars, generally used only in special individual high pressurized vehicle.
This pressure relief valve due to poor working conditions, is still using mechanical control methods. By the introduction of the intake pipe pressure, the pressure limit is reached when the boost value, the valve push rod, a portion of the exhaust gas to bypass the turbine directly into the exhaust pipe. This is to protect the engine at rated boost pressure, racing parts for sale and also avoid the long-term high speed turbine and early failure, protect the engine and turbo role
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