High Pressure Turbocharging of Two-Stroke Engines

An experimental program shows effects of various air charging system characteristics on performance of a highly turbocharged 2 stroke engine. The advantages displayed by a variable speed blower drive led to the conception and development of a hydraulic auxiliary energy system to supplement power supplied to the turbocharger by exhaust gas.

This system uses a small Pelton wheel type turbine, mounted on the turbocharger shaft and supplied with lubricating oil at high pressure from a pump located in the engine sump. Results from this system are good and allow flexible torque characteristics to be attained in an engine.