Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – With pump for non-working fluid
Patent
1993-12-08
1995-09-26
Bertsch, Richard A.
Rotary expansible chamber devices
Heat exchange or non-working fluid lubricating or sealing
With pump for non-working fluid
418151, 123196R, F01C 2104
Patent
active
054529964
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a rotary piston internal combustion engine having a casing comprised of two side portions and a center portion with a trochoidal inner mantle surface, the casing being penetrated by an eccentric shaft having an eccentric on which a triangular, oil-cooled piston rotates on a friction bearing whereby its edge sealing members are in constant contact with the inner mantle surface.
Such machines are commonly provided with an oil sump that is upwardly open and into which the lubricating and cooling oil drains and from where the oil is returned through oil filter and oil cooler into the bearings and the piston. Such an arrangement allows for a lateral tilting of the machine, which must be taken into consideration when driving an off-road vehicle or plane, only for a limited angular range because otherwise the oil supply from the oil sump is interrupted and air is sucked into the oil circuit or oil drains from the oil sump. A closed oil circuit has not been suggested for rotary piston internal combustion engines as of today and it can be realized for lifting piston machines, for example, for planes for air aerobatics, only with great constructive expenditure.
It is an object of the invention to construct a rotary piston internal combustion engine without oil sump which is position-independent, i.e., which can be tilted by 30.degree. and more about its horizontal longitudinal and transverse axes and even into an upside-down position, which can be stored in such positions for an extended period of time, and which is compact and has a minimal end face resistance.
SUMMARY OF THE INVENTION
The rotary piston internal combustion engine according to the present invention is primarily characterized by:
a casing comprised of a central or mantle portion and two side portions, the central portion having a trochoidal inner mantle surface;
an eccentric shaft extending through the casing having an eccentric portion with a friction bearing;
main bearings for supporting the eccentric shaft in the casing;
a rotary piston, triangular in cross-section and having an interior chamber and axial edges with sealing members, mounted on the friction bearing of the eccentric portion, wherein the sealing members remain at all times in contact with the trochoidal inner mantle surface during rotation;
a lubricating system including an oil cooler, a closed oil reservoir, and an oil filter, for lubricating and cooling the rotary piston, the lubricating system further comprising:
a) a first pump;
b) channels provided in at least one of the side portions of the casing in the vicinity of the eccentric shaft, the channels extending substantially axially, wherein the first pump removes oil from the rotary piston and the interior chamber through the channels into the closed oil reservoir; and
c) a second pump for returning oil from the closed oil reservoir through oil cooler and oil filter to the main bearings and the friction bearing.
Preferably, the first pump is formed by an exterior wall of the one side portion and a counterweight connected to the one side portion, wherein an end face of the counterweight facing the exterior wall has blades arranged concentrically to the eccentric shaft and wherein the exterior wall has a recess with a planar bottom and a sidewall that extends spirally in a radial outward direction, the blades extending into the recess.
Advantageously, the closed oil reservoir is arranged about the eccentric shaft.
Expediently, the second pump is an inner-axis geared pump positioned about the eccentric shaft within the oil reservoir.
Preferably, the first pump is an inner-axis geared pump positioned about the eccentric shaft. The second pump is an inner-axis geared pump also positioned about the eccentric shaft adjacent to the first pump.
In another embodiment of the present invention, the first pump is preferably formed by an exterior wall of one of the side portions and a counterweight connected to the one side portion. The end face of the counterweight facing the exterior
REFERENCES:
patent: 3359952 (1967-12-01), Jones et al.
patent: 3528398 (1970-09-01), Weissflog et al.
patent: 3877852 (1975-04-01), Louzecky
patent: 5085187 (1992-02-01), Black
Eiermann Dankwart
Speiser Josef
Bertsch Richard A.
Freay Charles G.
Wankel GmbH
LandOfFree
Position-independent rotary piston internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Position-independent rotary piston internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Position-independent rotary piston internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1549284