Multi-Cylinder Opposed-Piston Engine Results on Transient Test Cycle

Paper #:
  • 2016-01-1019

Published:
  • 2016-04-05
DOI:
  • 10.4271/2016-01-1019
Citation:
Sharma, A. and Redon, F., "Multi-Cylinder Opposed-Piston Engine Results on Transient Test Cycle," SAE Technical Paper 2016-01-1019, 2016, doi:10.4271/2016-01-1019.
Pages:
11
Abstract:
After having tested basic transient maneuvers such as load-step changes on the 4.9L three-cylinder opposed-piston diesel engine [1], a similar test-engine was subjected to a more aggressive test-routine - a hot-start heavy-duty FTP (Federal Test Procedure) transient cycle for the on-road engines. The three main objectives of this exercise were:1To assess the ability of the engine to meet the transient cycle requirements while maintaining close to the cycle-average BSFC for the FTP cycle derived from steady-state torque-to-fuel map.2To attain engine-out brake-specific emission levels that are compatible with US2010 EPA requirements with a conventional after-treatment system consisting of a diesel oxidation catalyst (DOC), a diesel particulate filter (DPF) and a selective catalyst reduction (SCR) system.3To compare hot-start FTP transient cycle fuel economy with a publicly available benchmark.The initial results from the test are encouraging - the BSFC value is within 1.2% of the value derived from running FTP cycle on a steady-state torque-to-fuel map. The engine-out emissions (BSNOx and BSSoot) levels generated during the test are compatible with US2010 EPA tail-pipe emissions requirements and can be controlled with contemporary after-treatment systems. Furthermore, compared to the MY2011 Cummins ISB 6.7L engine, Achates Power’s OP engine presents a cycle-average BSFC advantage of 18% during hot-start FTP cycle. These results highlight the capabilities of the Achates Power OP engine to successfully run aggressive transient maneuvers without compromising the required performance attributes.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2011-04-12
Technical Paper / Journal Article
2010-10-25
Training / Education
2010-07-07
Training / Education
2009-12-15