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A hot gas engine, such as a Stirling engine, which comprises a displacer portion and an expander portion with a heat exchanger connected therebetween. The expander portion has an expander piston which is operatively connected to and rotates an expander crankshaft. In like manner, the displacer porti

A hot gas engine, such as a Stirling engine, which comprises a displacer portion and an expander portion with a heat exchanger connected therebetween. The expander portion has an expander piston which is operatively connected to and rotates an expander crankshaft. In like manner, the displacer portion is provided with a displacer piston which is also operatively connected to and rotates with a separate displacer crankshaft. The two crankshafts are synchronized with respect to each other, preferably by means of an idler gear. Banks of displacer pistons can also be provided for operation on a common displacer crankshaft and banks of cooperating expander pistons also can be provided for operation on a common expander crankshaft.

대표청구항 ▼

A hot gas engine comprising: (a) an engine block, (b) a displacer cylinder in said engine block and having central axis and with a shiftable displacer piston therein, (c) an expander cylinder in said engine block and having central axis and with a shiftable expander piston therein, (d) a heat exchan

A hot gas engine comprising: (a) an engine block, (b) a displacer cylinder in said engine block and having central axis and with a shiftable displacer piston therein, (c) an expander cylinder in said engine block and having central axis and with a shiftable expander piston therein, (d) a heat exchange means connected across said displacer cylinder and expander cylinder, (e) a crankcase on one end portion of said engine block and located so as to communicate with ends of the expander and displacer cylinders, said engine block having a dimension measured along the central axis of said cylinder which is substantially greater than the like dimension of said crankcase, said engine block not being sealed from said crankcase against substantial pressure differential, (f) a first crankshaft in said crankcase operatively connected to said shiftable displacer piston and being rotatable therewith, (g) a second crankshaft in said crankcase operatively connected to said shiftable expander piston and being rotatable thereby, (h) first coupling means on said first crankshaft, (i) second coupling means on said second crankshaft, and (j) a power output shaft operatively coupled to one of said coupling means or one of said crankshafts and providing a power output from said hot gas engine.