ENGINE AUTOMATIC QUALITY CONTROL SYSTEM THROUGH NOISE ANALYSIS AND DIAGNOSTIC

An automatic production test system for quality control and diagnostics of automotive gasoline engine is presented. The equipment, based on a DIGITAL microprocessor PDP 11/23, analyzes and processes vibration signals as induced by running engines during a defined test bench cycle. The vibration signals are coming from only one accelerometer placed on the engine crankcase wall. With this equipment, abnormal vibrations are detected and mechanical defects like valve rattle, connecting rod knock and crank rumble, related to various engine components, identified. The hardware signal treatment and reject philosophy employed in the microprocessor software have been developed on the basis of correlations with the observed defect's characteristics during inspection and repair operations. The system is operating in the workshop quality inspection room and the quantitative obtained information is in good agreement with the engine behaviour.

• Supplemental Notes:
  • Proceedings of the International Symposium on Automotive Technology and Automation with particular reference to Computer Aided Engineering and Manufacturing, Volume 2, Wolfsburg 13-17 September 1982.
• Corporate Authors:

  Automotive Automotion Limited

  42 Lloyd Park Avenue
  Croydon CRO 5SB, Surrey,   England 
• Authors:
  • RUSPA, G
  • TURINO, G
• Conference:
  • Proceedings of the International Symposium on Automotive Technology and Automation with particular reference to Computer Aided Engineering and Manufacturing, Volume 2, Wolfsburg 13-17 September 1982.
• Publication Date: 1982

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 129-144

Subject/Index Terms

• TRT Terms: Defects; Detection and identification; Detectors; Diagnosis; Diagnostic tests; Gasoline engines; Inspection; Microprocessors; Motor vehicles; Quality control; Vehicle power plants; Vehicle tests; Vibration
• Old TRIS Terms: Automobile engines
• Subject Areas: Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00373462
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-034 059
• Files: HSL, USDOT
• Created Date: Jun 30 1983 12:00AM