A Two-Stroke Range Extender Engine For Heavy Duty BEV applications
Licentiate thesis, 2020
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.
gas exchange
Two-stroke engine
single cylinder
after burner
Range extender
Battery electric vehicles
BEV
Author
Lennarth Zander
Energy Conversion and Propulsion Systems
Zander, L., Dahlander, P. "Turbocharged Two-Strole SI Engine as Back Up Range Extender for Battery Electric Vehicles" Manuscript
Zander, L., Dahlander, P. "Analysis of a Turbocharged Single-Cylinder Two-Stroke SI-Engine Concept" Manuscript SAE Conference Detroit 2021
Subject Categories (SSIF 2011)
Mechanical Engineering
Other Mechanical Engineering
Embedded Systems
Other Electrical Engineering, Electronic Engineering, Information Engineering
Areas of Advance
Transport
Publisher
Chalmers