Diesel Combustion Mode Switching - A Substantial NVH Challenge

2009-01-2080

05/19/2009

Event
SAE 2009 Noise and Vibration Conference and Exhibition
Authors Abstract
Content
Tier 2, bin 5 diesel engines may use multiple combustion modes to achieve stringent emissions requirements. Unfortunately, switching between different combustion modes can cause step changes in noise that will be unacceptable to consumers. In this paper, several sound quality metrics are evaluated for their ability to quantify the NVH issues that arise during a rich pulse event. In addition, techniques are presented that allow an engine developer to reduce the NVH effects caused by changing combustion modes. Careful calibration tuning in close cooperation with performance and emissions development engineers is required to solve noise problems that arise from combustion mode switching events, since an NVH improvement may often come at the expense of a performance or emissions issue.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2080
Pages
13
Citation
Reinhart, T., "Diesel Combustion Mode Switching - A Substantial NVH Challenge," SAE Technical Paper 2009-01-2080, 2009, https://doi.org/10.4271/2009-01-2080.
Additional Details
Publisher
Published
May 19, 2009
Product Code
2009-01-2080
Content Type
Technical Paper
Language
English