Forced induction systems are designed to increase an engine's power output by compressing the intake air, allowing more air and fuel to be combusted in each engine cycle. Here are the key components for both turbocharged and supercharged systems:
Turbocharger Components
Turbocharger Unit:
Turbine Housing: Contains the turbine wheel, which is driven by exhaust gases.
Compressor Housing: Contains the compressor wheel, which compresses the intake air.
Center Housing/Rotor Assembly (CHRA): Houses the shaft connecting the turbine and compressor wheels and contains bearings and lubrication.
Intercooler:
Air-to-Air Intercooler: Uses ambient air to cool the compressed intake air.
Air-to-Water Intercooler: Uses water to cool the compressed intake air, often more efficient and compact.
Wastegate:
Internal Wastegate: Built into the turbocharger, controls boost by bypassing exhaust flow around the turbine.
External Wastegate: Separate unit, more precise boost control, used in high-performance applications.
Blow-off Valve (BOV): Releases excess pressure in the intake system when the throttle is closed to prevent compressor surge.
Boost Controller: Manages the amount of boost pressure by controlling the wastegate.
Turbo Manifold: Connects the exhaust ports of the engine to the turbocharger, directing exhaust gases to the turbine.
Supercharger Components
Supercharger Unit:
Roots-Type Supercharger: Uses meshing lobes to push air into the intake manifold.
Twin-Screw Supercharger: Compresses air internally between two meshing screws before forcing it into the engine.
Centrifugal Supercharger: Similar to a turbocharger, but belt-driven, uses an impeller to draw in and compress air.
Intercooler: Often used in supercharged systems to cool the compressed air before it enters the engine (air-to-air or air-to-water).
Drive Belt: Connects the supercharger to the engine’s crankshaft, powering the supercharger.
Bypass Valve: Allows air to bypass the supercharger when boost is not needed, improving efficiency and reducing parasitic loss.
