Internal-combustion engines – Adjustable combustion chamber – Piston in head adjusted
Patent
1984-08-30
1986-12-02
Feinberg, Craig R.
Internal-combustion engines
Adjustable combustion chamber
Piston in head adjusted
123 48D, 123 78A, 123 78D, F02B 7504
Patent
active
046256849
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to internal combustion engines with a variable auxiliary chamber and its object is to provide an engine in which the chamber for compression of the fluid producing movement of the piston in the cylinder of the engine has a variable volume with a constant compression ratio so that the volumetric ratios may vary in accordance with the different running states of the engine and it may be possible to put under combustion a large or small part of the combustive fluid introduced into the expansion chamber of the engine.
The object is achieved according to the invention by the fact that the engine is characterised in that it comprises, close to that end of the cylinder which corresponds to the upper dead point of the piston, a second and a third cylinder, the second cylinder forming an integral part of the first cylinder while the third cylinder communicates with the first cylinder by a conduit, either directly or by way of the second cylinder, a piston being provided in both the second and the third cylinder to delimit two chambers in these cylinders.
According to the invention, the pistons of the second and the third cylinder are subjected to an alternating movement by means of crank pins set at an angle of 180.degree. from each other on the shaft of a small crank forming with the cam shaft a kinematic chain in which the casing of the clutch is situated.
Also according to the invention, in the clutch casing, the transmission inlet gearing is driven by the cam shaft without being locked thereto but is connected thereto by spiral grooves on the shaft and, situated in the same plane, the output gearing driven by the input gearing provides for the transmission of the shaft of the small crank without being locked thereto and is also connected to the latter by spiral grooves.
For a better understanding of the invention, the latter is now described in more detail on the basis of the annexed schematic drawing given solely by way of example, showing in:
FIG. 1 a partial longitudinal section through an engine according to the invention; and in
FIGS. 2 and 3 a section, respectively, through the lines 2--2 and 3--3 of FIG. 1.
The drawing shows an internal combustion engine having a cylinder 1. Arranged in the cylinder in a position close to the end of the cylinder corresponding to the upper dead point of the piston 2 are a second cylinder 3 forming an integral part of the first cylinder 1 and a third cylinder 4 partitioned off from the other cylinders but communicating by a duct with the first cylinder 1 either directly or, as shown indirectly via opening 5 of FIG. 1, by way of the second cylinder.
In each of the cylinders 3 and 4 there is mounted a piston 6 and 7, respectively, and in the third cylinder 4 there are provided injection means 8 and means 9 for igniting the mixture.
The distribution of air compressed by the first cylinder 1 into cylinder 4, the combustion cylinder, and cylinder 3, the air reserve cylinder, can be adjusted by means of the throttle 10 according to the desired motor torque.
According to the invention, the clutch casing 11 is situated in the kinematic chain between the cam shaft 12 and the small crankshaft 13 which has two crank pins 14,14' set at an angle of 180.degree. from each other and transmitting the alternating movement to the pistons 6, 7, respectively of the second and third cylinders 3,4.
The transmission input gearing 15 is driven by the cam shaft 12 without being locked thereto, the gearing being connected to the cam shaft by spiral grooves 16.
Similarly, situated in the same plane, the output gearing 17 driven by the input gearing 15 provides for the transmission of the small crankshaft 13 without being locked thereto, the output gearing 17 being also connected by spiral grooves 16 identical to those of the cam shaft 12.
Two guide pins 18 parallel to the cam shaft 12 and to the small crankshaft 13 are fixed in the head 19 and extend through bores in the walls of the clutch casing 11 so that the casing cannot shift transversely. These two pins are provid
REFERENCES:
patent: 1435777 (1922-11-01), Williams
patent: 1489004 (1924-04-01), Powell
patent: 1754410 (1930-04-01), Allwill
patent: 2563885 (1951-08-01), Tatter
patent: 3741175 (1973-06-01), Rouger
Farber Martin A.
Feinberg Craig R.
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