29. Aachener Kolloquium Fahrzeug- und Motorentechnik 2020
Untersuchung eines Motors mit erweiterter Expansion und variablem Verdichtungsverhältnis
Autoren
Dr. Justin Ketterer, Ryan Heinbuch, General Motors, Warren, Michigan, USA
Zusammenfassung
To achieve high efficiency and high power density, extended-expansion has been coupled with variable compression ratio. This produces high expansion ratios for efficient part-load operation and low compression ratios to minimize knock. A 6-bar linkage with a driven and phased eccentric shaft was selected as the most promising implementation of an engine achieving both extended-expansion and variable compression ratio. The proposed system generates a geometrically-extended expansion stroke. Though coupled, compression and expansion ratios can be varied by phasing a rotating eccentric shaft. Software was developed to specify linkage geometries achieving piston motion targets within known constraints. A single cylinder prototype engine was built and part-load dynamometer testing was completed.
Mitglieder des Österreichischen Vereins für Kraftfahrzeugtechnik haben Zugriff auf alle Vorträge der Internationalen Wiener Motorensymposien.