THE WISHART CYCLE FOR INTERNAL COMBUSTION ENGINES

Thermodynamic cycle for heat engines, the Wishart cycle, is presented. Its air-standard thermal efficiency is derived from first principles and the cycle is shown to have four independent variables which are: the compression ratio, the expansion ratio, the quantity of fuel heat added and the quantity of otherwise rejected heat reused. A theoretical analysis of the cycle is made to explore the characteristics of the cycle. An application of the cycle to a reciprocating internal combustion engine is presented to convey the typical benefits in thermal performance and mechanical efficiency which can be achieved. The limiting phenomenon of detonation which limits the relative power output of conventional spark-ignition engines is not present in Wishart cycle engines. The paper concludes that the cycle makes it possible to achieve conditions whereby engine processes can be performed more ideally, in engine components suited specifically for each process, than those which are possible for sequential processes operating in a single cylinder (A). (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0858251639
• Supplemental Notes:
  • Engineering Conference 1982. Changing Society--A Challenge for Engineering, held February 22-26, 1982 at Hobart.
• Corporate Authors:

  Institution of Engineers

  11 National Circuit
  Barton, A.C.T.,   Australia 
• Authors:
  • Wishart, A J
• Conference:
  • Engineering Conference 1982. Changing Society--A Challenge for Engineering, held February 22-26, 1982 at Hobart.
• Publication Date: 1982

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 31-37

Subject/Index Terms

• TRT Terms: Combustion; Compression; Conferences; Economic efficiency; Expansion; Heat; Internal combustion engines; Motors; Piston engines; Thermal efficiency
• Uncontrolled Terms: Efficiency
• Old TRIS Terms: Compression ratio; Cycles
• ITRD Terms: 3860: Combustion; 5532: Compression; 8525: Conference; 5911: Efficiency; 6720: Expansion; 6743: Heat; 1334: Motor
• Subject Areas: Economics; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00362165
• Record Type: Publication
• Source Agency: ARRB
• ISBN: 0 85825 163 9
• Report/Paper Numbers: No. 81/1
• Files: ITRD, TRIS, ATRI
• Created Date: Aug 30 1982 12:00AM