This article describes Caterpillar's latest vehicle diesel engine, the 3176, which has been designed around British fuel-injection technology to give it low exhaust emissions, with superior performance and good fuel economy. Power ratings between 186 and 242 KW (253 and 220 h.p.) are being offered. The principal advantage of the Lucas pump-injector system used there is that it makes very high injection pressures up to 1500 bars (21,750 lb/sq in) attainable, giving rapid injection. This enables retarded timing, that can be adjusted continually to suit engine loadings and speed-cutting emissions without loss of efficiency. The Lucas unit-injector system is able to go far beyond immediately foreseeable limits, because its design concept has allowed for the incorporation of special injector features, to give two-stage injection and even lower nitrogen oxide and noise levels. A colenoid electromagnetic actuator is used for the spill valve, to provide control over the start, length and finish of the injection. These events are precisely timed by an electronic control unit, which, in advanced vehicle applications, can also receive signals from the transmission and other chassis areas. The Lucas injectors will have five sizes, to cover engines with displacements from 0.4 to 2.8 litres per cylinder. (TRRL)

  • Availability:
  • Corporate Authors:

    Institute of Road Transport Engineeers

    1 Cromwell Place
    London SW1 25F,   England 
  • Publication Date: 1990-5


  • English

Media Info

  • Pagination: p. 12, 14
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00609892
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM