Miller Cycle Application to the Scuderi Split Cycle Engine (by Downsizing the Compressor Cylinder) Southwest Research Institute

Format:

Conference/Event

Author/Creator:

Branyon, Branyon, author.

Contributor:

Simpson, Dana (Dean)

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

The Scuderi engine is a split cycle design that divides the four strokes of a conventional combustion cycle over two paired cylinders, one intake/compression cylinder and one power/exhaust cylinder, connected by a crossover portrait This configuration provides potential benefits to the combustion process, as well as presenting some challenges. A Miller cycle configuration of the engine is made possible by turbocharging with a downsized compressor cylinder and has been modeled in 1-dimensional cycle simulation software. Several positive interactions were found between the split cycle engine and Miller cycle operating principles, namely:Parametric variations are made across the operating range of the engine, investigating a range of potential Miller factors and boost levels. Analysis is performed to determine engine performance sensitivity to turbomachinery performance. At low load, a secondary level Miller cycle is applied through the use of early intake valve closure to provide near throttle-less load control. Simulation results indicate that high BMEP and good thermal efficiency are achievable in the main operating region. The resulting improvements in thermal efficiency and maximum BMEP provide the potential for significant fuel energy savings in an automotive application. BMEP provides benefits both through the effect of downsizing reducing the mass and size of the engine payload that must be transported, as well as by allowing the engine to operate at a higher operational BMEP and therefore higher efficiency during typical driving conditions

Notes:

Vendor supplied data

Publisher Number:

2012-01-0419

Access Restriction:

Restricted for use by site license