AN INTEGRATED ELECTRONIC CONTROL SYSTEM FOR A CVT BASED POWERTRAIN

An experimental development project has resulted in a microprocessor-based control system for a powertrain comprising a petrol engine, a dry-plate clutch, and a Continuously Variable Transmission of the V-chain type. Control functions, primarily associated with the clutch and CVT, are implemented to the maximum possible extent in software. This allows a simple and potentially economical hardware configuration, involving a minimum number of sensors and actuators. The microprocessor, working through proportional pressure control valves, has direct control of the individual hydraulic actuators for clutch and CVT. Techniques of parameter estimation and multi-variable control are used. Vehicle installations have demonstrated excellent driveability, with fuel economy 5% better than a 5-speed, manual gearbox. The integrated control system configuration allows additional functions (e.g. cruise control) to be implemented very simply and economically.

• Supplemental Notes:
  • ISATA 84, "In Pursuit of Technical Excellence". Proceedings Volume 1. International Symposium on Automotive Technology and Automation with particular reference to Vehicle Management Systems and Flexible Manufacturing Systems, Milan, Italy 24-28 September 1984.
• Corporate Authors:

  Automotive Automotion Limited

  42 Lloyd Park Avenue
  Croydon CRO 5SB, Surrey,   England 

  Alfa Romeo Auto SpA

  Milan,   Italy 
• Authors:
  • Wade, JMA
• Conference:
  • ISATA 84, "In Pursuit of Technical Excellence". Proceedings Volume 1. International Symposium on Automotive Technology and Automation with particular reference to Vehicle Management Systems and Flexible Manufacturing Systems, Milan, Italy 24-28 September
• Publication Date: 1984

Media Info

• Features: Figures;
• Pagination: p. 93-108

Subject/Index Terms

• TRT Terms: Clutches; Continuously variable transmissions; Control systems; Cruise control; Driveability; Electronic control; Fuel conservation; Microprocessors; Power trains; Pressure; Software
• Uncontrolled Terms: Hardware
• Old TRIS Terms: Pressure control
• Subject Areas: Energy; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00399883
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: ISATA 84006, HS-038 424
• Files: HSL, USDOT
• Created Date: Oct 31 1985 12:00AM