Assessment of charge-air cooler health in diesel engines using nonlinear time series analysis of intake manifold temperature

Alok A. Joshi, Scott James, Peter Meckl, Galen King, Kristofer Jennings

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Degradation in the cooling effectiveness of a charge-air cooler (CAC) in a medium-duty turbocharged diesel engine has significant impact on engine performance. This degradation lowers the boost pressure and raises the intake manifold temperature. As a result, the engine provides lower horsepower and higher hydrocarbon levels than the rated values. The objective of this research is to monitor the health of the charge-air cooler by analyzing the intake manifold temperature signal. Experiments were performed on a Cummins ISB series turbocharged diesel engine, a 6-cylinder inline configuration with a 5.9 l displacement volume. Air flowing over the cooler was blocked by varying amounts, while various engine temperatures and pressures were monitored at different torquespeed conditions. Similarly, data were acquired without the introduction of any fault in the engine. For the construction of the manifold temperature trajectory vector, average mutual information estimates and a global false nearest neighbor analysis were used to find the optimal time parameter and embedding dimensions, respectively. The prediction of the healthy temperature vector was done by local linear regression using torque, speed, and their interaction as exogenous variables. Analysis of residuals generated by comparing the predicted healthy temperature vector and the observed temperature vector was successful in detecting the degradation of the charge-air cooler. This degradation was quantified by using box plots and probability density functions of residuals generated by comparing intake manifold temperature of healthy and faulty charge-air coolers. The general applicability of the model was demonstrated by successfully diagnosing a fault in the exhaust gas recirculation cooler of a different engine.

Original languageEnglish (US)
Pages (from-to)1-11
Number of pages11
JournalJournal of Dynamic Systems, Measurement and Control, Transactions of the ASME
Volume131
Issue number4
DOIs
StatePublished - Jul 2009
Externally publishedYes

Fingerprint

time series analysis
Time series analysis
diesel engines
coolers
health
Diesel engines
Health
air
engines
Air
Engines
degradation
Degradation
Temperature
temperature
horsepower
Cylinder configurations
Exhaust gas recirculation
exhaust gases
acceleration (physics)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Mechanical Engineering
  • Instrumentation

Cite this

Assessment of charge-air cooler health in diesel engines using nonlinear time series analysis of intake manifold temperature. / Joshi, Alok A.; James, Scott; Meckl, Peter; King, Galen; Jennings, Kristofer.

In: Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, Vol. 131, No. 4, 07.2009, p. 1-11.

Research output: Contribution to journalArticle

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