AN INJECTION SYSTEM FOR IMPROVING DIESEL ENGINES

BEITRAG DES EINSPRITZSYSTEMS ZUR VERBESSERUNG DES DIESELMOTORS

The electronically controlled injection system described is suitable for optimising the combustion in diesel engines. It operates at injection pressures up to 2000 atmospheres and permits the injection process to be formed and enables the start of injection to be altered. Tests on a suction motor with direct injection led to the following results: with increased injection pressures up to approximately 1000 atmospheres exhaust cloudiness (soot emission) and fuel consumption reduced, especially at low engine speed at full load. The nitric oxide emission increases marginally with this. Injection pressures over 1000 atmospheres were found to be not advantageous in the engine tested. For each engine speed there is an optimum injection time which is partly dependent on injection pressure. A slowly increasing rate of injection decreases combustion pressure increase at the expense of heavier exhaust clouding. Rapid closure of the injection valve reduces carbon emission. In the further development of injection systems the use: cost ratio should be critically checked. Measured against the high operation safety of conventional systems, the development stage of the test described is at present insufficient. /TRRL/

  • Availability:
  • Corporate Authors:

    Bosch (Robert) GmbH

    Abteilung FSD, Pastfach 50
    7000 Stuttgart 1,   Germany 
  • Authors:
    • Eblen, E
    • Stumpp, G
  • Publication Date: 1978-1

Language

  • German

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 70-81
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194964
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD, TRIS
  • Created Date: Jul 11 1979 12:00AM