Combustion monitoring in engines using accelerometer signals

S. Narayan1 , Sasa Milojevic2 , Vipul Gupta3

1Mechanical Engineering Department, Qassim University, 51431, Saudi Arabia

2University of Kragujevac, Faculty of Engineering, Department for Motor Vehicles and IC Engines, Kragujevac, Serbia

3Mechanical Engineering Departmen, Indus University, India

1Corresponding author

Journal of Vibroengineering, Vol. 21, Issue 6, 2019, p. 1552-1563.
Received 11 January 2019; received in revised form 20 May 2019; accepted 27 May 2019; published 30 September 2019

Copyright © 2019 S. Narayan, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Recent regulations for emission control from combustion engines have led to focus on various methods to monitor control and the combustion process. The presented work explores the potential relationship between various combustion events monitored using in-cylinder pressure transducer and the resulting block vibration measured using accelerometers. Various features of combustion development process were derived from the vibration data acquired. The methodology was analyzed using a single cylinder diesel engine. The heat release data was able to detect and extracted various indicators of the combustion process like start of combustion and half of injected fuel positions. Higher correlation was observed for the data computed using heat release curve obtained from the in-cylinder pressure measurements and those obtained using the accelerometer signals. The proposed methodology can be used to optimize the fuel injection timing in order to reduce emissions from engines to comply with various regulations. The practical importance of presented work demonstrates use of monitoring of block vibration signals as a mean of non-intrusive methods of diagnosis of engine for its effective condition monitoring.

Combustion monitoring in engines using accelerometer signals

  • Various phases of combustion process in diesel engine cycle are analyzed.
  • Conventional diesel engine spray formation discussed.
  • Soot and NOx formation trade-off in Diesel engines discussed.
  • Fuel injection parameters changes to analyze effects on block acceleration signals.
  • Accelerometer mounted in vertical and horizontal orientations.
  • Use of block acceleration signals to extract features of combustion process.

Keywords: combustion engine, non-intrusive measurements process, blocks vibrations.


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