A methodology for combustion detection in diesel engines through in-cylinder pressure derivative signal

In-cylinder pressure measurement has historically been used for off-line combustion diagnosis, but online application for real-time combustion control has become of great interest. This work considers low computing-cost methods for analysing the instant variation of the chamber pressure, directly obtained from the electric signal provided by a traditional piezoelectric sensor. Presented methods are based on the detection of sudden changes in the chamber pressure, which are amplified by the pressure derivative, and which are due to thermodynamic phenomena within the cylinder. Signal analysis tools both in time and in time-frequency domains are used for detecting the start of combustion, the end of combustion and the heat release peak. Results are compared with classical thermodynamic analysis and validated in several turbocharged diesel engines.

[1]  H. Climent,et al.  A comparison of different algorithms for boost pressure control in a heavy-duty turbocharged diesel engine , 2007 .

[2]  Rolf Isermann,et al.  Methods for engine supervision and control based on cylinder pressure information , 1999 .

[3]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[4]  M. Hasegawa,et al.  Study on Engine Management System Using In-cylinder Pressure Sensor Integrated with Spark Plug , 2004 .

[5]  Martin Eickhoff,et al.  Combustion Pressure Based Engine Management System , 2000 .

[6]  Alberto Broatch,et al.  Combustion chamber resonances in direct injection automotive diesel engines: A numerical approach , 2004 .

[7]  Myoungho Sunwoo,et al.  Closed-Loop Control of Spark Advance and Air-Fuel Ratio in SI Engines Using Cylinder Pressure , 2000 .

[8]  Anthony Truscott,et al.  Reducing Diesel Emissions Dispersion by Coordinated Combustion Feedback Control , 2006 .

[9]  Pascal Higelin,et al.  Limitations of Ionization Current Sensors and Comparison with Cylinder Pressure Sensors , 2000 .

[10]  David R. Lancaster,et al.  MEASUREMENT AND ANALYSIS OF ENGINE PRESSURE DATA , 1975 .

[11]  S. Qian,et al.  Joint time-frequency analysis : methods and applications , 1996 .

[12]  Carlos Guardiola,et al.  A comparison of different methods for fuel delivery unevenness detection in Diesel engines , 2006 .

[13]  O. Armas,et al.  Diagnosis of DI Diesel combustion from in-cylinder pressure signal by estimation of mean thermodynamic properties of the gas , 1999 .

[14]  Carlos Guardiola,et al.  Air mass flow estimation in turbocharged diesel engines from in-cylinder pressure measurement , 2010 .

[15]  Jeremy Worm.  An Evaluation of Several Methods for Calculating Transient Trapped Air Mass with Emphasis on the “Delta P” Approach , 2005 .

[16]  Michael F. J. Brunt,et al.  Evaluation of Techniques for Absolute Cylinder Pressure Correction , 1997 .

[17]  John Alexander Steel,et al.  Indirect measurement of cylinder pressure from diesel engines using acoustic emission , 2005 .

[18]  Marek T. Wlodarczyk,et al.  High-Accuracy Low-Cost Cylinder Pressure Sensor for Advanced Engine Controls , 2001 .

[19]  G. Ripley,et al.  Cylinder Pressure-Based Control of Pre-Mixed Diesel Combustion , 2007 .

[20]  Giorgio Rizzoni,et al.  A stochastic model for the indicated pressure process and the dynamics of the internal combustion engine , 1989 .

[21]  Roger Johnsson,et al.  Cylinder pressure reconstruction based on complex radial basis function networks from vibration and speed signals , 2006 .

[22]  Andrew Ball,et al.  Monitoring of diesel engine combustions based on the acoustic source characterisation of the exhaust system , 2008 .

[23]  Antonio J. Torregrosa,et al.  Wavelet Transform applied to Combustion Noise Analysis in High-speed DI Diesel Engines , 2001 .

[24]  Giorgio Rizzoni,et al.  ENGINE KNOCK ANALYSIS AND DETECTION USING TIME-FREQUENCY ANALYSIS , 1996 .

[25]  M. Hasegawa,et al.  Study on Ignition Timing Control for Diesel Engines Using In-Cylinder Pressure Sensor , 2006 .

[26]  Carlos Guardiola,et al.  Injection diagnosis through common-rail pressure measurement , 2006 .

[27]  Vicente Bermúdez,et al.  Sensitivity of diesel engine thermodynamic cycle calculation to measurement errors and estimated parameters , 2000 .

[28]  W. L. Brown.  Methods for Evaluating Requirements and Errors in Cylinder Pressure Measurement , 1967 .

[29]  Alberto Broatch,et al.  New methodology for in-cylinder pressure analysis in direct injection diesel engines—application to combustion noise , 2005 .

[30]  Robert B. Randall,et al.  RECONSTRUCTION OF DIESEL ENGINE CYLINDER PRESSURE USING A TIME DOMAIN SMOOTHING TECHNIQUE , 1999 .

[31]  Payri,et al.  Modified impulse method for the measurement of the frequency response of acoustic filters to weakly nonlinear transient excitations , 2000, The Journal of the Acoustical Society of America.