Prova WRX STI VAB T-REV 03 EJ20Y

A valve system that reduces the internal pressure of the crankcase and reduces engine resistance.

VAB, GVB / GRB, GVF / GRF WRX STI
EJ20Y, EJ207, EJ257

By adopting a special lead valve structure for the engine system, it is a crank case internal pressure control valve system that suppresses the increase in the internal pressure of the crank case and keeps it in a slightly depressurized state. In a reciprocating internal combustion engine, the pressure inside the crankcase increases as the piston moves up and down and the body temperature rises, and a minute positive pressure state (about 1 to 3 kPa) exists as part of the engine resistance value as an engine internal loss. ..

The T-REV system adopts a special one-way valve based on the reed valve type that has excellent followability to continuous pressure fluctuations, responds to repeated pressure fluctuations at high speed, and enables appropriate and accurate pressure control. By doing so, it is set to maintain a slightly depressurized state (about -5 to -10 kPa at idle) under operating conditions. Achieves overall improvement in engine response and drivability and lower resistance.

This product is designed to maintain an appropriate slight decompression state by introducing outside air from the air filter part when the decompression state exceeds the set value when stopped or operating.

* VAB, GVB / GRB, GVF / GRF EJ20Y, EJ207, EJ257 For engine system
* Exhausted blow-by gas is returned to the intake path