This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Continuously Variable Displacement Drive for Engines Part 1, Performance Simulation
Technical Paper
2021-01-0442
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Event:
SAE WCX Digital Summit
Language:
English
Abstract
A new type of drive system has been designed, analyzed, patented, prototyped, and tested. The drive’s unique capabilities include the ability to vary the bottom dead center position to reduce the stroke, and simultaneously vary the top dead center position to achieve the desired compression ratio with one simple, low friction mechanism. The purpose of the concept is to reduce losses associated with operation at partial load as most engines spend a preponderance of their operating life at partial load. Cummins sponsored engine simulation of the CVD configured as a 9-cylinder gasoline engine cycle and a baseline engine which was a conventional V8 engine of the same displacement and compression ratio. The study showed a ~30% improvement in fuel economy on a 10-mode weighted cycle that was designed by Cummins to simulate the FTP cycle. This paper covers the performance analysis while SAE 2021-01-0451, “Continuously Variable Displacement Drive for Engines, Part 2, Design, Analysis, and Test” covers the remaining work.
Citation
Arnold, S. and Tillock, B., "Continuously Variable Displacement Drive for Engines Part 1, Performance Simulation," SAE Technical Paper 2021-01-0442, 2021, https://doi.org/10.4271/2021-01-0442.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 |
Also In
References
- Alsterfalk , M. , Filipi , Z.S. , and Assanis , D.N. The Potential of the Variable Stroke Spark-Ignition Engine SAE Technical Paper 970067 1997 https://doi.org/10.4271/970067
- Knezek , R. and Pastucek , M. Jan. 10, 2017
- Sanderson , A. , Dieckmann , J. Feb. 19, 2008
- Scalzo , J.
- Scalzo , J. Mar. 1. 1988
- Arnold , S. Aug. 20, 2013
- Arnold , S. Jul. 21, 2020
- Heywood , J.B.