Turbocharged engine driven positive displacement blower having a bypass passage

摘要

A turbocharged internal combustion engine, preferably of the two-stroke cycle type, is provided with a Roots type positive displacement charging blower having a bypass passage in one end plate and controlled by a single plunger control valve responsive solely to blower outlet pressure to provide for bypassing air flow around the blower under various engine operating conditions either in reverse direction to reduce excess blower power or in the direction of flow to provide additional charging air.