Abstract
KEYWORDS – Positive Crankcase Ventilation (PCV), Pressure Regulating Valve (PRV), Fresh air, blow-by gas, oil sludge
ABSTRACT –
A wide variety of engine ventilation system concepts are used to circulate blow-by gases inside of engine for gasoline engines. For turbocharged gasoline engine, the complexity rises due to additional connection to turbocharger. One difficulty with engine ventilation is that many hardware concepts are possible and do exist in many automotive companies and the industry does not seem to converge to one best practice regarding type of blow-by control devices and usage of fresh air. This research starts with systematic comparison of specifications, architecture characteristics, and pros and cons of existing various ventilation systems. Important criteria necessary to meet system requirements are defined to decide the best architecture of developing gasoline turbo engine. In order to decide optimal ventilation architecture, Pugh concept selection matrix is utilized to evaluate various concepts and rates each system based on requirements. Major control factors defined in P-diagram are utilized to optimize the system and verification of the system effectiveness.