Analysis of the Hardware Requirements for a Heavily Downsized Gasoline Engine Capable of Whole Map Lambda 1 Operation MAHLE Powertrain Limited

Format:

Conference/Event

Author/Creator:

Bassett, Bassett, author.

Contributor:

Cooper, Adrian

Gray, Kevin

Hall, Jonathan

Reader, Simon

Taylor, James

Vogler, Christian

Wall, Richard

Conference Name:

WCX World Congress Experience (2018-04-10 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2018

Summary:

AbstractMAHLE has developed a heavily downsized demonstrator engine to explore the limits, and potential benefits, of engine downsizing. The 1.2 litre, 3-cylinder, MAHLE downsizing (Di3) engine, in conjunction with an Aeristech 48V electric supercharger (eSupercharger, eSC), achieves a BMEP level of 35bar and a specific power output in excess of 160kW/litre. The eSupercharger enables high specific power output, good low speed torque and excellent transient response. The resulting heavily downsized engine has been installed into a demonstrator vehicle that also features 48V mild hybridization.At specific power output levels above 90kW/litre the engine is operated with excess fuel in order to protect the turbine from excessive exhaust gas temperatures. In this analytical study, the boosting system requirements to maintain lambda 1 fuelling, via the use of EGR, across the entire engine operating map for the eSupercharged version of the MAHLE Di3 engine, have been explored. It has been found that a HP EGR system, with the eSupercharger located downstream of the main compressor, has the greatest potential to enable lambda 1 operation at maximum power output. At this point an EGR flow rate of 15% is required, which would require about 38kW of EGR cooling capability

Notes:

Vendor supplied data

Publisher Number:

2018-01-0975

Access Restriction:

Restricted for use by site license