This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Identification and Correction of the Error Induced by the Sampling Method Used to Monitor Cylinder Pressure of Reciprocating Internal Combustion Engines
Technical Paper
2012-01-1155
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Cylinder pressure measurements are common practice for internal combustion reciprocating engines during field or lab applications for the purpose of combustion analysis, condition monitoring etc. The most accurate method is to measure cylinder pressure using a crank angle encoder as a trigger source to guarantee cylinder pressure measurement at predefined crank angle events. This solution, even though favorable, presents a number of practical difficulties for field applications and increased cost, for this reason its use is practically restricted to lab applications. Therefore a commonly used approach for ad hoc measurements is to digitize samples at fixed time intervals and then convert time into crank angle assuming a constant rotational speed. But if engine rotational speed is not constant within the engine cycle this may result to incorrect cylinder pressure CA referencing. To identify the error introduced from improper cylinder pressure CA phasing, and to propose methods to minimize the negative impact on the measured cylinder pressure traces, an experimental setup has been developed based on a single cylinder prototype DI diesel engine. Measurements were performed using the two aforementioned technical solutions with simultaneous measurement of the engine instantaneous rotational speed. The direct comparison of the two sets of measured cylinder pressure traces reveals the introduced indexing error. Following this, an attempt is made to propose a correction methodology based on the estimation of the engine instantaneous rotational speed. For its estimation three different methods are proposed and evaluated. The first method makes use of a low resolution instantaneous speed signal, provided by a sensor reading marks on the engine flywheel, the second makes use of the BDC and TDC events and the third is based on the comparison of the duration of the compression and expansion phases. As revealed from the analysis all three methods results to a reduction of the error induced in the estimation of Indicated Work by a magnitude of 10 times i.e. from up to 7% to less than 1%.
Recommended Content
Authors
Topic
Citation
Antonopoulos, A. and Hountalas, D., "Identification and Correction of the Error Induced by the Sampling Method Used to Monitor Cylinder Pressure of Reciprocating Internal Combustion Engines," SAE Technical Paper 2012-01-1155, 2012, https://doi.org/10.4271/2012-01-1155.Also In
References
- Hountalas, D. Kouremenos, D. Fiveland, S. “Some Considerations on the Estimation of the Heat Release of DI Diesel Engines Using Modelling Techniques,” SAE Technical Paper 2004-01-1405 2004 10.4271/2004-01-1405
- Hountalas, D. T. Papagiannakis, R. G. A Simulation Model for the Combustion Process of Natural Gas Engines with Pilot Diesel Fuel as an Ignition Source
- Hountalas, D. Lamaris, V. Pariotis, E. “Identification of the Error Introduced in DI Diesel Engine Phenomenological Multi-Zone Models from Assumptions Related to the Initial Conditions at the Nozzle Exit,” SAE Technical Paper 2010-01-0153 2010 10.4271/2010-01-0153
- Hountalas, D. Kouremenos, D. Binder, K. Schwarz, V. et al. “Effect of Injection Pressure on the Performance and Exhaust Emissions of a Heavy Duty DI Diesel Engine,” SAE Technical Paper 2003-01-0340 2003 10.4271/2003-01-0340
- Lamaris, V. Antonopoulos, A. Hountalas, D. “Evaluation of an Advanced Diagnostic Technique for the Determination of Diesel Engine Condition and Tuning Based on Laboratory Measurements,” SAE Technical Paper 2010-01-0154 2010 10.4271/2010-01-0154
- Lamaris, V.T. Hountalas, D.T. A general purpose diagnostic technique for marine diesel engines - Application on the main propulsion and auxiliary diesel units of a marine vessel Energy Conversion and Management 51 4 740 753 2010
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill Book Company 1998 491 558
- Brunt, M. Pond, C. “Evaluation of Techniques for Absolute Cylinder Pressure Correction,” SAE Technical Paper 970036 1997 10.4271/970036
- Rosseel, E. Sierens, R. Baert, R. “Evaluating Piezo-electric Transducer Response to Thermal Shock from In-cylinder Pressure Data,” SAE Technical Paper 1999-01-0935 1999 10.4271/1999-01-0935
- Hountalas, D.T. Anestis, A. Effect of pressure transducer position on measured cylinder pressure diagram of high speed diesel engines Energy Conversion and Management 39 1998 589 607
- Hribernik, A. “Statistical Determination of Correlation Between Pressure and Crankshaft Angle During Indication of Combustion Engines,” SAE Technical Paper 982541 1998 10.4271/982541
- Pipitone, Emiliano Beccari, Alberto Determination of TDC in internal combustion engines by a newly developed thermodynamic approach APPL THERM ENG 2010 30 14 1914 26
- Hountalas, D.T. Kouremenos, A.D. Evaluation of a thermodynamic method for the determination of the TDC position in reciprocating internal combustion engines Kjelstrup, S Hustad, E Gundersen, T Røsjorde, A Tsatsaronis, G ECOS 2005: Proceedings of the 18th International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems 2005 Jun 20 25 Trondheim, Norway Tapir Academic Press 677 82
- Hountalas, D.T. Antonopoulos, A.K. Effect of Instantaneous Rotational Speed on the Analysis of Measured Diesel Engine Cylinder Pressure Data ECOS 2011 Novi Sad, Serbia
- Giakoumis, E G Rakopoulos, C D Dimaratos, A M Study of crankshaft torsional deformation under steady-state and transient operation of turbocharged diesel engines P I MECH ENG K-J Multi-body Dynamics 2008 222 17 30
- Schagerberg, S. McKelvey, T. “Instantaneous Crankshaft Torque Measurements - Modeling and Validation,” SAE Technical Paper 2003-01-0713 2003 10.4271/2003-01-0713
- Taraza, D. Henein, N. Bryzik, W. “Determination of the Gas-Pressure Torque of a Multicylinder Engine from Measurements of the Crankshaft's Speed Variation,” SAE Technical Paper 980164 1998 10.4271/980164
- Giakoumis, E G Rakopoulos, C D Dimaratos, A M Study of crankshaft torsional deformation under steady-state and transient operation of turbocharged diesel engines P I MECH ENG K-J Multi-body Dynamics 2008 222 17 30
- Taraza, D. Henein, N. Bryzik, W. “Determination of the Gas-Pressure Torque of a Multicylinder Engine from Measurements of the Crankshaft's Speed Variation,” SAE Technical Paper 980164 1998 10.4271/980164
- Tinaut, F.V. et al. “Misfire and compression fault detection through the energy model” Mechanical Systems and Signal processing 21 2002 1521 1535