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  2. Blowoff valve - Wikipedia

    en.wikipedia.org/wiki/Blowoff_valve

    A blowoff valve is designed to release pressure in the intake system when the throttle is closed. A "recirculating" type blowoff valve releases the pressurised air back into the non-pressurized section of the intake (i.e. upstream of the turbocharger), while an "atmospheric venting" type blowoff valve dumps the air directly into the atmosphere.

  3. Supercharger - Wikipedia

    en.wikipedia.org/wiki/Supercharger

    The design used a complex series of bypass valves in the induction and exhaust systems as well as an electromagnetic clutch so that, at low engine speeds, a boost was derived from the supercharger. In the middle of the rev range, a boost was derived from both systems, while at the highest revs the system disconnected the drive from the ...

  4. Wastegate - Wikipedia

    en.wikipedia.org/wiki/Wastegate

    Inside the wastegate actuator, a spring acts to open the wastegate, and oil pressure acts to close the wastegate. On the oil output side of the wastegate actuator sits the density controller, an air-controlled oil valve which senses upper deck pressure and controls how fast oil can bleed from the wastegate actuator back to the engine. As the ...

  5. Boost controller - Wikipedia

    en.wikipedia.org/wiki/Boost_controller

    A 3-port solenoid-type boost controller A 4-port solenoid-type boost controller (used for a dual-port wastegate). The purpose of a boost controller is to reduce the boost pressure seen by the wastegate's reference port, in order to trick the wastegate into allowing higher boost pressures than it was designed for.

  6. Automatic Performance Control - Wikipedia

    en.wikipedia.org/wiki/Automatic_Performance_Control

    If it is, then the control unit activates a solenoid valve that directs boost pressure to the turbocharger's pneumatically controlled wastegate, that opens to bypass exhaust gases from the turbocharger directly to the exhaust pipe, lowering turbo boost pressure until the knock subsides. Knock events that are managed by the APC can be discerned ...

  7. Twincharger - Wikipedia

    en.wikipedia.org/wiki/Twincharger

    A mechanically driven supercharger offers exceptional response and low-rpm performance, as it does not rely on pressurization of the exhaust manifold (assuming that it is a positive-displacement design, such as a Roots-type or twin-screw, as opposed to a centrifugal supercharger, which does not provide substantial boost in the lower rpm range), but is less efficient than a turbocharger due to ...

  8. Chrysler 1.8, 2.0 & 2.4 engine - Wikipedia

    en.wikipedia.org/wiki/Chrysler_1.8,_2.0_&_2.4_engine

    The turbocharger compressor housing features a built-in bypass valve, and the turbo housing is cast into the exhaust manifold with a loop-around flow pattern. The boost level varies anywhere from 11 psi (0.76 bar) to 15 psi (1.0 bar), depending on the PCM's desired torque target and temperature conditions, but will be reduced if significant ...

  9. Roots blower - Wikipedia

    en.wikipedia.org/wiki/Roots_blower

    An Eaton M62 Roots-type supercharger is visible at the front of this Ecotec LSJ engine in a 2006 Saturn Ion Red Line.. The Roots-type blower is simple and widely used. It can be more effective than alternative superchargers at developing positive intake manifold pressure (i.e., above atmospheric pressure) at low engine speeds, making it a popular choice for passenger automobile applications.