A systems approach is implemented to fully optimize the overall performance of a gasoline SIDI two-valve “small block” engine. The objective is to maximize fuel economy while achieving significant improvements in idle stability, cold-start emissions, and torque and power performance relative a baseline port-fuel-injected (PFI) engine. The scope includes the optimization of the fuel injector, piston, cylinder head, cams, in-cylinder charge motion, and the intake-manifold. The results show that the SIDI engine provides the potential to achieve 6.5% better fuel economy; a result of higher efficiency when implementing a higher geometric compression ratio and significantly better combustion performance. A multiple fuel-injection strategy is examined to provide lower HC emissions at a representative cold-start operating condition. The engine’s idle stability is improved by a factor of three; the individual contributions from a better combustion system design and from multiple fuel injections are identified. The new SIDI engine concept demonstrated significantly better wide-open-throttle (WOT) performance, including up to 10% higher torque and 6% more power when using premium fuel. This document further demonstrates the performance sensitivity to engine design variables while emphasizing the importance of using a systems approach to achieve optimized performance for the direct-injection engine technology.
Skip Nav Destination
ASME 2013 Internal Combustion Engine Division Fall Technical Conference
October 13–16, 2013
Dearborn, Michigan, USA
Conference Sponsors:
- Internal Combustion Engine Division
ISBN:
978-0-7918-5609-3
PROCEEDINGS PAPER
Development and Optimization of a Two-Valve Spark-Ignition Direct-Injection (SIDI) Small Block Engine
David J. Cleary,
David J. Cleary
General Motors Research and Development, Warren, MI
Search for other works by this author on:
Ronald O. Grover, Jr.,
Ronald O. Grover, Jr.
General Motors Research and Development, Warren, MI
Search for other works by this author on:
David P. Sczomak
David P. Sczomak
General Motors Powertrain, Pontiac, MI
Search for other works by this author on:
David J. Cleary
General Motors Research and Development, Warren, MI
Ronald O. Grover, Jr.
General Motors Research and Development, Warren, MI
David P. Sczomak
General Motors Powertrain, Pontiac, MI
Paper No:
ICEF2013-19168, V001T03A021; 12 pages
Published Online:
February 26, 2014
Citation
Cleary, DJ, Grover, RO, Jr., & Sczomak, DP. "Development and Optimization of a Two-Valve Spark-Ignition Direct-Injection (SIDI) Small Block Engine." Proceedings of the ASME 2013 Internal Combustion Engine Division Fall Technical Conference. Volume 1: Large Bore Engines; Advanced Combustion; Emissions Control Systems; Instrumentation, Controls, and Hybrids. Dearborn, Michigan, USA. October 13–16, 2013. V001T03A021. ASME. https://doi.org/10.1115/ICEF2013-19168
Download citation file:
9
Views
0
Citations
Related Proceedings Papers
Related Articles
Study of Multimode Combustion System With Gasoline Direct Injection
J. Eng. Gas Turbines Power (October,2007)
Modeling Mixture Formation in a Gasoline Direct Injection Engine
J. Appl. Mech (November,2006)
Experimental and Computational Studies on Gasoline HCCI Combustion Control Using Injection Strategies
J. Eng. Gas Turbines Power (July,2007)
Related Chapters
A Simple Carburetor
Case Studies in Fluid Mechanics with Sensitivities to Governing Variables
Later Single-Cylinder Engines
Air Engines: The History, Science, and Reality of the Perfect Engine
Alternative Systems
Turbo/Supercharger Compressors and Turbines for Aircraft Propulsion in WWII: Theory, History and Practice—Guidance from the Past for Modern Engineers and Students