Internal-combustion engines – Rotating cylinder – Radial
Patent
1994-09-16
1996-06-11
Koczo, Michael
Internal-combustion engines
Rotating cylinder
Radial
F02B 5704
Patent
active
055245773
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to radial engines.
This invention has particular but not exclusive application to internal combustion engines, and for illustrative purposes particular reference will be made to such application. However, it is to be understood that this invention could be used in other applications, such as fluid compressors or pumps which are embraced hereinafter by the term "engine".
Currently, most engine designs use circular-section single acting pistons supported by a crankshaft for reciprocation within cylinders to and from a cylinder head against which the combustion pressures react or the fluid is compressed. Such designs have been favored primarily because of the simplicity of sealing against gas pressure between circular pistons and circular cylinders bores. The concentration of engineering development of piston engines has maintained this design in the premier position among internal combustion engines and compressors for many years.
However, such engines have a number of disadvantages, including large size and weight relative to output power and, in many instances, inherent vibration. They also suffer from friction losses due to the reciprocal motion of the pistons which results in wear and power consumption on the side thrust faces of the pistons and cylinders. They are also relatively complex due to the need, in their most common four-stroke form, to provide inlet and outlet poppet valves and associated operating mechanisms for each cylinder. Known radial engines have the disadvantage that they are even more complex due to the requirement to provide individual drives to each of the spaced cylinder heads for the respective inlet and outlet valves.
SUMMARY OF THE INVENTION
The present invention aims to alleviate the above and other disadvantages and to provide engines which will be reliable and efficient in use. Other objects and advantages of this invention will hereinafter become apparent.
With the foregoing and other objects in view, this invention in one, aspect directed to four stroke engines resides broadly in an engine assembly including: said crankshaft assembly, said cylinder assembly having a plurality of cylinders disposed radially about the crankshaft assembly; operation within said cylinders; said cylinders, and assembly such that said cylinder assembly may rotate in an opposite direction to said crankshaft assembly at a rotational speed substantially equal to the rotational speed of said crankshaft assembly divided by the number of cylinders; introduced into or expelled from said cylinders extending substantially radially through the cylinder closure means and the ports being grouped in pairs of circumferentially spaced inlet and exhaust ports, the number of pairs of circumferentially spaced groups of inlet and exhaust ports being half of one more than the number of cylinders and each inlet port including a plurality of circumferentially extending slots at least two of which are positioned so as to provide variable inlet timing.
This invention in a second aspect directed to two stroke engines resides broadly in an engine assembly including: said crankshaft assembly, said cylinder assembly having a plurality of cylinders disposed radially about the crankshaft assembly; operation within said cylinders; said cylinders, and assembly such that said cylinder assembly may rotate in an opposite direction to said crankshaft assembly at a rotational speed substantially equal to the rotational speed of said crankshaft assembly divided by the number of cylinders; introduced into or expelled from said cylinders extending substantially radially through the cylinder closure means and the ports being grouped in pairs of circumferentially spaced inlet and exhaust posts, the number of pairs of circumferentially spaced groups of inlet and exhaust ports being one more than the number of cylinders and each inlet port including a plurality of circumferentially extending slots at least two of which are positioned so as to provide variable inlet timing.
The cylinder
REFERENCES:
patent: 1331749 (1920-02-01), Freer
patent: 2181705 (1939-11-01), Meyer
patent: 2234187 (1941-03-01), Meyer et al.
patent: 2242231 (1941-05-01), Cantoni
patent: 3921602 (1975-11-01), Froumajou
patent: 3971349 (1976-07-01), Froumajou
patent: 4010719 (1977-03-01), Lappa
patent: 4077365 (1978-03-01), Schlueter
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