Title: Vibration and emissions quantification over key drive cycles using cylinder deactivation

Authors: Thomas Reinhart; Andrew Matheaus; Chris Sharp; Bryar Peters; Matthew Pieczko; James McCarthy Jr.

Addresses: Southwest Research Institute, San Antonio, Texas, USA ' Southwest Research Institute, San Antonio, Texas, USA ' Southwest Research Institute, San Antonio, Texas, USA ' Eaton, Galesburg, MI, USA ' Eaton, Galesburg, MI, USA ' Eaton, Galesburg, MI, USA

Abstract: Cylinder deactivation has been shown to provide higher grade heat to improve diesel aftertreatment performance during low load operation while providing a fuel and CO₂ savings. This paper evaluates engine and aftertreatment performance along with engine vibration over eight drive cycles in a dynamometer test cell. The eight drive cycles include the heavy-duty federal test protocol, low load cycle, Orange County Transit Authority bus cycle, New York bus cycle, Air Resource Board cycle and a portion of the 55-mph cruise cycle. Results show the tailpipe NOx and CO₂ reduction along with both linear and torsional vibration to quantify NVH. The emission results were quantified using both conventional and close-coupled aftertreatment systems. The linear vibration from the engine during CDA was generally consistent with normal operation; thus, removing NVH as a barrier for implementation. Adding a low NOx aftertreatment system to the CDA engine showed emission levels within proposed future regulations.

Keywords: cylinder deactivation; CDA; vibration; NOx reduction; CO₂ reduction; linear vibration; torsional vibration; exhaust temperature.

DOI: 10.1504/IJPT.2020.111245

International Journal of Powertrains, 2020 Vol.9 No.4, pp.315 - 344

Received: 27 Mar 2020
Accepted: 21 May 2020
Published online: 16 Nov 2020 *

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