This analytical study compares the calculated fuel economy of an automotive free-piston Stirling hydraulic engine and drive system with a pneumatic accumulator to the fuel economy of both a conventional 1980 spark-ignition engine in an X-body class vehicle and the estimated fuel economy of a 1983 spark-ignition engine. The results of the study show that the free-piston Stirling hydraulic system with a two-speed transmission has a combined fuel economy nearly twice that of the 1980 spark-ignition engine - 21.5 to 10.9 km/liter (50.7 to 25.6 mpg) under comparable conditions. The fuel economy improvement over the 1984 spark-ignition engine is 81 percent. The overall engine and drive system efficiency (ratio of power to wheels to fuel in) is 36 percent. The study also includes the fuel economy sensitivity of the Stirling hydraulic system to system weight, number of transmission shifts, reduced drag coefficient, and varying vehicle performance requirements.
Free-piston Stirling hydraulic drive for automobiles
Hydraulischer Stirlingantrieb mit freiem Kolben fuer Automobile
1983
16 Seiten, 8 Bilder, 4 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
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