A Two-Stroke Range Extender Engine For Heavy Duty BEV applications

Author: Lennarth Zander; Chalmers University Of Technology; []

Keywords: TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gas exchange; after burner; single cylinder; Two-stroke engine; Range extender; BEV; Battery electric vehicles;

Abstract: A back-up range extender (REX) is proposed to support battery electric vehicles (BEV) for heavy duty applications. A single cylinder crank case scavenged two-stroke SI-internal combustion engine (ICE) with a turbocharger system is considered powerful and small enough to be installed directly on the existing electric machine in the electric powertrain. The two-stroke engine needs a specially designed turbocharger system assisted by an afterburner system to fulfill the scavenging and exhaust emission requirements. This thesis has investigated and developed such a charging system functionality and demonstrated it on a 125cc engine single cylinder engine. This shows that a 125cc single cylinder two- stroke engine was able to obtain 50 kW or 400 kW/L swept volume indicating that an upscaled version of this engine to 425cc will be able to produce the desired rated power of 150 kW.

  CLICK HERE TO DOWNLOAD THE WHOLE DISSERTATION. (in PDF format)