Internal-combustion engines – Rotary – With compression – combustion – and expansion in a single...
Patent
1996-12-24
1999-11-30
Koczo, Michael
Internal-combustion engines
Rotary
With compression, combustion, and expansion in a single...
418 33, F02B 5300
Patent
active
059923717
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a rotary piston machine usable particularly as a thermal engine, of the internal combustion or diesel type, for example.
It is specified in the present application that half a revolution means a rotation along a 180 degree angle.
Engines are known which comprise several pairs of pistons rotationally driven about the axis of a power intake shaft, each pair of pistons determining a variable volume chamber in which the gas mixture is introduced during the intake phase. The rotation of the power intake shaft results from the gas expansion during the corresponding phase of the thermodynamic cycle. One of the two pistons is attached to the power intake shaft, the other piston being attached to a countershaft kinematically connected to the power intake shaft by a transmission of movement. The power intake shaft and the countershaft are coaxially mounted in one another and the transmission of movement induces an alternating rotational movement of the countershaft with respect to the power intake shaft, such that the volume of the chamber determined by each pair of pistons varies alternately between a minimum and a maximum, consistently with the phases of the thermodynamic cycle used.
A plurality of solutions have been proposed for obtaining the transmission of movement between the power intake shaft and the countershaft. Thus, one has proposed a transmission using elliptical toothed wheels, which are complex to manufacture, or off-centered toothed wheels whose unbalance must be compensated for by balancing weights, which increases the number of moving masses. One has also proposed transmissions of movement comprising two planet gears cooperating by meshing with a central gear and each affixed to a crank and connecting rod system inducing an angular reciprocating motion on the countershaft, by means of a radial arm. Balancing weights are also necessary with such a solution, the crank and connecting rod systems being, by their constitution, unbalance effect generators. In addition, these additional weights are positioned at a distance from an axis of rotation, which contributes to reduce the efficiency of the engine.
One also knows from the state of the art engines equipped with two rotors mounted with an interpenetration configuration, the motion of one being continuous, whereas the motion of the other occurs intermittently. This type of engine comprises a disengageable means for activating the second rotor, said means being constituted by a transmission of movement between the first rotor and the second rotor.
It has appeared that the solutions proposed for obtaining the transmission of movement are not satisfactory.
The object of the present invention is to resolve the aforementioned problems, and the invention is related to an engine of the aforementioned type including an engine unit 1 in which a cylindrical chamber 2 is provided wherein are coaxially mounted two rotors 5, 8, with an interpenetration configuration, and which form with said chamber at least one working chamber to rotate about the geometrical axis of the cylindrical chamber 2, and in which a gas mixture prevails according to the phases of a thermodynamic cycle, one of the two rotors, rotor 5, being continuously rotationally driven, whereas the other, rotor 8, is intermittently rotationally driven in the same direction as the first, said machine further comprising:
a disengageable means for rotationally actuating the second rotor, constituted by a means for transmitting movement between the rotor 5 and the rotor 8, coupled to the first rotor 5, on the one hand, and to the rotor 8, on the other hand, said transmission means, on the kinematic chain for transmitting movement between the rotor 5 and the rotor 8, comprising an engaging member.
This machine is essentially characterized in that it is provided with an non-return mechanism comprising a first element 12 fixed to the engine unit 1 and a second element 13 in engagement with the intermittent rotor 8, said elements 12, 13 cooperate with one another through an an
REFERENCES:
patent: 1481220 (1924-01-01), Nichols
patent: 3294071 (1966-12-01), Turco
patent: 4281628 (1981-08-01), Doundoulakis
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