Internal-combustion engines – Vibration compensating device – Balancing arrangement
Patent
1996-02-14
1997-08-05
Kamen, Noah P.
Internal-combustion engines
Vibration compensating device
Balancing arrangement
F02B 7506
Patent
active
056532032
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a reciprocating piston engine, in particular an internal combustion engine, having at least one cylinder in which a piston connected to a crankshaft is reciprocatingly guided.
2. Description of the Prior Art
In reciprocating piston engines of the kind described above, a great variety of auxiliary units, including balancing masses which, in the context of the present invention, are considered as constituting auxiliary units, are driven by the crankshaft either directly or with the interposition of kinematic, positively engaging connections. Balancing masses for the balancing of free forces of gravity of a reciprocating piston engine of the above kind are provided in the form of rotating balance weights which, depending upon their intended use, are also provided in gear wheels connected to the crankshaft for driving supplementary and/or other auxiliary units.
SUMMARY OF THE INVENTION
The object of the invention is to create a reciprocating piston engine of the kind described above in the body of which auxiliary units, and, in particular, balancing masses, may be disposed, and where at least a desired motion of the masses may be derived through actuation with kinematic, positively engaging connections inside the body of the engine.
The above object is achieved according to the invention by a mass balancing arrangement where the crankshaft is connected to at least two cams having a control contour and rotating along with the crankshaft, each of the cams acting upon at least one balancing mass as actuation means therefor, the balancing masses being force-guided to be movable back and forth as a function of the crankshaft rotation. This arrangement has the advantage that cam plates of the above kind can be accommodated inside the engine housing in the area of the crankshaft chamber, namely because the cam plates can be directly connected to the crankshaft, each with a control contour which is matched to the respective intended use thereof. In corresponding intended uses of the above arrangement, the cam plates can also each be connected to the crankshaft on the outside of the engine body. The required dynamic effect necessary for actuating the auxiliary unit or units, the balancing masses in this case, can be achieved directly by the control contour. The above may also be achieved by disposing the cam plate with its control contour inside the engine housing and the auxiliary unit outside the engine housing, wherein corresponding transfer means are provided between the cam plate and the auxiliary unit which pass through the wall of the engine housing. It is possible with the aid of such masses, which are guided to be movable back and forth, to balance forces of gravity produced by the connecting rod and the piston directly at the location where they are produced. Such forces of gravity may be produced where a cam plate is disposed directly on the crank, in which case the affiliated balancing mass must be provided in the reciprocating engine in the same effective direction, but with a course of motion opposite to that of the piston. The balancing mass can be respectively guided in a purely translational motion, preferably in a pivoting motion. In particular, in multi-cylinder in-line reciprocating piston engines, it is possible to provide balancing masses of the above kind still inside the engine housing respectively in the area of the crankshaft ends. The above arrangement results in a balancing of the free moments of inertia of the first and higher orders by means of a corresponding dimensioning of the pair of balancing masses. Since the balancing masses are disposed as close as possible to the crankshaft ends, the compensation masses as a whole can be kept relatively low. The further advantage of the embodiment according to the invention is that the motion of the balancing masses can be predetermined via the control contour of the cam plate. In the simplest embodiment, the cam plate has a circular contour and is connected eccentr
REFERENCES:
patent: 1738877 (1929-12-01), Edwards et al.
patent: 1794715 (1931-03-01), Knight
patent: 4351202 (1982-09-01), Summers
Bick Werner
Bollig Christoph
Von Essen Mathias
FEV Motorentechnik GmbH & Co. Kommanditgesellschaft
Kamen Noah P.
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