Since the advent of the automotive on-board micro-processor, there has been a need to control pressure differential by using a square wave duty cycle source. Initial electronic control unit (ECU) work was done using standard pressure/vacuum solenoid vent valves. The standard valves have the limitation of: slow response; heavy armature with molded tip and long stroke; temperature, pressure and voltage sensitivity; and requiring closed loop control. This paper reviews the Borg-Warner electronic flow controller (EFC) as a variable duty cycle controlled unit to control pressure differential as a function of input current. The moving metal armature weighs less than 2.0 grams and travels less than 25 microns.

Media Info

  • Features: Figures;
  • Pagination: p. 365-376

Subject/Index Terms

Filing Info

  • Accession Number: 00399899
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: ISATA 84022, HS-038 440
  • Files: HSL, USDOT
  • Created Date: Oct 31 1985 12:00AM