One of the primary causes of premature failure of petrol engines is the use of excessive engine speeds, particularly under cold start conditions. This problem is most evident in light commercial vehicles due to the gearing used. The unit described in this paper offers a solution to this problem which does not adversely affect driveability. The unit replaces the conventional throttle linkage with an electronic control. This controller contains a microprocessor which monitors the drivers pedal setting, the engine speed and the coolant temperature while operating the throttle with a small d.c. motor. This allows the driver full control of the throttle unless a maximum speed is exceeded, in which case the throttle is over-riden by the controller. Emphasis has been placed upon a design leading to a low cost, compact package easily fitted with a minimum of modification to the existing engine system.

Media Info

  • Features: Figures; References;
  • Pagination: p. 449-462

Subject/Index Terms

Filing Info

  • Accession Number: 00393110
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: Proceeding, HS-037 234, HS-037 235
  • Files: HSL, USDOT
  • Created Date: Mar 29 1985 12:00AM