This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
On-Line Detection of Vibration Damper Failure in Internal Combustion Engines
Annotation ability available
Sector:
Language:
English
Abstract
Many internal combustion engines are equipped with a vibration damper attached to the front. Excessive thermal loads on the viscous damping element occasionally lead to damper failure, which in turn causes excessive torsional oscillation amplitudes in the crankshaft, and subsequent damage to the engine if the damper failure is not recognized immediately. Two non-contacting magnetic sensors at the engine front and flywheel detect the speed at both locations, and the torsional crankshaft strain. A digital circuit, which includes a microprocessor, samples and processes the raw engine speed speed data. The transducer concept provides for stable operation independent of motor speed and varying ambient temperatures. Experimental data were recorded on an eight-cylinder Diesel engine with and without damper. The measurements, made under steady state operating conditions, show that the speed oscillation amplitudes at the engine front more than double when the damper fails. The torsional amplitudes also increase more than twofold. A PROM resident program monitors continuously the engine speed and torsional oscillations. If excessive speed or torsional oscillation amplitudes are detected, a warning message is displayed immediately, so that engine damage is avoided.
Recommended Content
Authors
Topic
Citation
Mauer, G. and Watts, R., "On-Line Detection of Vibration Damper Failure in Internal Combustion Engines," SAE Technical Paper 900487, 1990, https://doi.org/10.4271/900487.Also In
References
- Sood, A. K. Friedlander C. B. Fahs A. A. 1985 “Engine Fault Analysis: Part I - Statistical Methods” IEEE Trans. on Industrial Electronics IE32 4 294 300 November
- Sood, A. K. Fahs A. A. Henein N. A. 1985 “Engine Fault Analysis: Part II - Parameter Estimation Approach,” IEEE Trans. on Industrial Electronics IE32 4 301 307 November
- Citron, S. J. O'Higgins J. E. Chen L. Y. 1989 “Cylinder by Cylinder Engine Pressure and Pressure Torque Waveform Determination Utilizing Speed Fluctuations,” SAE paper # 890486
- Mihelo, W. P. Citron S. J. 1984 “An On-Line Engine Roughness Measurement Technique SAE Paper # 840136
- Mauer, G. F. Watts R. J. 1989 “On- Line Cylinder Diagnostics on Combustion Engines by Noncontact Torque and Speed Measurements,” SAE paper 890485
- Mauer, G. F. Watts R. J. 1989 “A Method for Cylinder-Specific Engine Fault Diagnostics,” Proc. 1st Int. Machinery Monitoring and Diagnostics Conf. September
- Mauer, G. F. Watts R. J. 1989 “Combustion Engine Performance Diagnostics by Kinetic Energy Measurement,” Proc. ASME Internal Combustion Engines Conf. October
- Bouverie, W. M. et al. 1979 “Data Acquisition for Use in Determining Malfunctions of Cylinders of an Internal Combustion Engine,” US Patent 4 179 922 December
- Buck et al. 1981 “Apparatus for Diagnosing Faults in Individual Cylinders in an Internal Combustion Engine,” US Patent 4 295 363 October
- Westbrook, M. H. 1985 Sensors for Automotive Application Journal of Physics E Scientific Instruments 18 9 September 751 758