Turbo-Discharging: Predicted Improvements in Engine Fuel Economy and Performance Loughborough Univ

Format:

Conference/Event

Author/Creator:

Williams, Williams, author.

Contributor:

Baker, Alan T.

Garner, Colin P.

Conference Name:

SAE 2011 World Congress & Exhibition (2011-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

The importance of new technologies to improve the performanceand fuel economy of internal combustion engines is now widelyrecognized and is essential to achieve CO₂ emissions targets andenergy security. Increased hybridization, combustion improvements,friction reduction and ancillary developments are all playing animportant part in achieving these goals. Turbocharging technologyis established in the diesel engine field and will become moreprominent as gasoline engine downsizing is more widely introducedto achieve significant fuel economy improvements.The work presented here introduces, for the first time, a newtechnology that applies conventional turbomachinery hardware todepressurize the exhaust system of almost any internal combustionengine by novel routing of the exhaust gases. The exhaust stroke ofthe piston is exposed to this low pressure leading to reduced oreven reversed pumping losses, offering 5% increased engine torqueand up to 5% reduced fuel consumption. This method has the distinctadvantage of providing performance and fuel economy improvementswithout significant changes to the structure of the engine, thecombustion system or lubrication system.The Turbo-Discharging concept is introduced and analyzed. Acombination of filling/emptying models and 1-D gas dynamicsimulations were used to quantify the energy flows and identifyoptimum valve timings and turbomachine characteristics. 1-D gasdynamic simulation was then used to predict primary fuel economybenefits from Turbo-Discharging. Secondary benefits, such asextended knock limits are then discussed

Notes:

Vendor supplied data

Publisher Number:

2011-01-0371

Access Restriction:

Restricted for use by site license