POSSIBLE WAYS OF REDUCING FUEL CONSUMPTION IN 4-STROKE INTERNAL COMBUSTION ENGINES WITH A HIGH SPECIFIC PERFORMANCE
MOEGLICHKEITEN DER VERBRAUCHSVERRINGERUNG BEI OTTOMOTOREN HOHER SPEZIFISCHER LEISTUNG
Previous attempts to reduce fuel consumption and exhaust fumes have shown that there are many reserves available to improve low speed behaviour and simultaneously be able to maintain a high specific performance. With an existing engine construction there is the possibility, by relatively simple measures, of thermodynamic optimisation to reduce the fuel consumption by up to 30%. This optimisation includes an increase in compression, changes to the combustion chamber shape with intensive turbulence in the charge, in addition to retaining the optimum values for ignition timing and fuel-air-ratio at every point in the operation of the characteristic field. The so-called lean-motor exhibits primarily only one component of the thermodynamically optimised engine. The key to the improvement, economy and safety of the lean-engine lies in increasing the compression ratio. A full scale test programme at porsche, in which 80 vehicles of type 924 were tested with thermodynamically optimised engines and with normal road-engines, has shown that the fuel consumption of these vehicles is lower by 6 to 15 percent than with production vehicles. Although the engines are run with a spark gap distance close to the pinking limit no damage to date is apparent from pinking combustion. (TRRL)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0642510660
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Corporate Authors:
Franckhlsche Verlagshandlung
Pfizerstrasse 5, Postfach 640
7000 Stuttgart 1, Germany -
Authors:
- Gruden, D
- Hahn, R
- Striebich, H
- Publication Date: 1980
Language
- German
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 77-82
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Serial:
- ATZ - Automobil Technische Zeitschrift
- Volume: 82
- Issue Number: 2
- Publisher: Franckhlsche Verlagshandlung
Subject/Index Terms
- TRT Terms: Air pollution; Air quality management; Combustion chambers; Compression; Design; Energy conservation; Exhaust gases; Fuel consumption; Fuel injection; Improvements; Internal combustion engines; Motors; Optimization; Tests; Thermodynamics; Vehicles
- Old TRIS Terms: Compression ratio; Exhaust emission control; Optimum design
- ITRD Terms: 1394: Catalytic converter; 212: Energy conservation; 232: Fuel consumption; 9108: Improvement; 1334: Motor; 6255: Test; 1255: Vehicle
- Subject Areas: Design; Energy; Environment; Highways; Vehicles and Equipment; I96: Vehicle Operating Costs;
Filing Info
- Accession Number: 00331378
- Record Type: Publication
- Source Agency: Bundesanstalt für Straßenwesen (BASt)
- ISBN: 0 642 51066 0
- Files: ITRD, TRIS
- Created Date: Aug 15 1981 12:00AM