Flow is shut at engine start in order to quickly warm-up the engine.
Valve is designed to open by the force of cooling water flow so that the valve could stay open during power off (for fail safe).
Module integrated electronics all integrated sensors
Advanced control strategies and diagnostics
Compatibility with blow-molded and injected tank shells
Evolutive to meet future regulations
Hitachi Automotive Systems
With conventional wastegated turbochargers or fixed geometry turbochargers (FGT), a turbine flow area cannot be adjusted during operation.
Knocking is abnormal combustion in which the air-fuel mixture ignites prematurely due to exposure to high temperature and pressure, creating an unwanted high-frequency noise. When the compression ratio is increased, the temperature at compression top dead center (TDC) also rises, increasing the probability of knocking.