Motors: expansible chamber type – Cyclically operable – Distributor in piston
Patent
1996-06-12
1998-09-15
Nguyen, Hoang
Motors: expansible chamber type
Cyclically operable
Distributor in piston
91229, 91336, F01L 1512, F01L 2104
Patent
active
058064036
ABSTRACT:
A uniflow engine has a plurality of cylinders disposed symmetrically around a common crankshaft connected to pistons reciprocating in the cylinders. In response to the availability of a working fluid vapor at a predetermined condition, such as a high pressure or temperature, incoming vapor is supplied to those cylinders in which the respective pistons are in their working strokes to thereby initiate rotation of the crankshaft in which the crankshaft had stopped last. Once rotation is initiated and a predetermined mode change speed attained in a "start-up model" by engine operation from start, vapor inlet valves are controlled to change engine operation over to a "running mode". In the "start-up mode" incoming vapor is admitted over a substantial portion of the piston working stroke, whereas in the "running mode" vapor inflow is terminated relatively early in the working stroke so that a vapor change does work in expending against the piston.
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patent: 4698973 (1987-10-01), Johnston
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