Development of A/T Oil Temperature Sensor Plausibility Diagnostic Logic

자동변속기 오일 온도센서 출력 이상 진단 로직 개발

  • Kwon, Jun-Eui (Research & Development Division for Hyundai Motor Company & Kia Motors Corporation) ;
  • Choi, Young-Sun (Kefico Engineering & Technology Institute, KEFICO CORPORATION) ;
  • Sim, Jang-Sun (Kefico Engineering & Technology Institute, KEFICO CORPORATION)
  • Published : 2005.11.01

Abstract

The CARB in USA has demanded OBD functions that detect any deterioration of performance of OTS as well as a simple defect of OTS which can affect emission to meet the reinforced emission regulation. In this paper, OTS plausibility monitoring functions to meet the demand from CARB are discussed. The output from OTS is used for the diagnostics of the torque converter clutch stuck and the gear ratio synchronous error. It is possible to diagnose the abnormality of OTS function by considering the oil temperature characteristics which changes according to the driving status of vehicles. In result, the OBD regulations of the CARB can be satisfied obligating car manufacturer to detect any problems in OTS functions which can affect emissions.

Keywords

References

  1. C. K. Park, 'The Trends of Technologies to Reduce Automotive Exhaust' Emissions,' Hyundai Motor Company, Technical Review Vol.15, pp.1-12, 2002
  2. California Air Resources Board, Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicle and Engines(OBD II), Title 13, California Code Regulation, Section 1968.2
  3. California Air Resources Board, Enforcement of Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicle and Engines, Title 13, California Code Regulation, Section 1968.5
  4. SAE J2012, Diagnostic Trouble Code DefinitionEquivalent to ISO/DIS 15031-6 : April 30, 2002, Apri12002(SAE J2012)
  5. Robert Bosch Gmbh, Software Documentation MG 7.9.8 Diagnostic, Control Specification, pp.50-53, 2003