Engine performance was investigated using a rectangular displacer on the piston crown to cause a forced air flow in a vertical-disk combustion chamber of a single-cylinder, 4-stroke-cycle compression-ignition engine. The optimum air-flow area was determined first with the area concentrated at one end of the displacer and then with the area equally divided between two passages, one at each end of the displacer. Best performance was obtained with the two-passage air flow arranged to give a calculated maximum air-flow speed of 8 times the linear crank-pin speed. With the same fuel-spray formation as used without the air flow, the maximum clear exhaust brake mean effective pressure at 1,500 r.p.m. was increased from 90 to 115 pounds per square inch and the corresponding fuel consumption reduced from 0.46 to 0.43 pound per brake horsepower-hour. At 1,200 r.p.m., a maximum clear exhaust brake mean effective pressure of 120 pounds per square inch was obtained at a fuel consumption of 0.42 pound per brake horsepower-hour. At higher specific fuel consumption the brake mean effective pressure was still increasing rapidly.
Performance tests of a single-cylinder compression-ignition engine with a displacer piston
1935-02-01
Miscellaneous
No indication
English
Boosted performance of compression-ignition engine with displacer piston
Engineering Index Backfile | 1936
|A Visual Study in a Displacer-Piston Compression-Ignition Engine
SAE Technical Papers | 1937
|The free- displacer, free- piston stirling engine- potential ernergy conserver.
Automotive engineering | 1975
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