DE3918786A1 - STARTER FOR A FREE FLOWING PISTON ENGINE - Google Patents

Abstract

In a starter motor for an axial-piston engine with a stepped piston (14), two variable-length belt elements (98, 100) pass around an exentric element (92, 94, 96). The belt elements are connected directly or indirectly to interspaced points (114, 116) on the stepped piston.

Description

The invention relates to a starter for one free-floating stepped piston engine with between outer piston stages existing pre-compressor and burner chambers.

A corresponding engine, also known as the Stelzer engine, can be found in DE-OS 30 29 287. The engine is constructive simply constructed and consists of only a few individual parts. Therefore, universal use is possible, with the Combustion power gained directly through the piston stages is workable. The stepped piston can be drilled axially to be through this z. B. to promote a liquid.

The object of the present invention is to provide a starter for to provide an appropriate motor that is simple is built and ensures the stepped piston in the  to shift the desired frequency without complex mecha niche and / or electronic measures or the like are such. Also easy to decouple the starter and Step pistons may be possible.

According to the invention, the object is essentially achieved solved that eccentrically in a rotating shaft a rotatably mounted pin is arranged, the connec tion elements with or from the outer piston stages outgoing sections and / or interacting with them Elements is connected such that the rotational movement in a Translation movement is feasible. Here are the connections fixed elements both with the pin and with the piston stages or indirectly or directly with those of connected to these outgoing sections.

According to the invention, a type of crank mechanism is consequently used to to set the step piston in vibration. The one in rotary motion shaft to be displaced, which can be compared with a crank is from a starter motor or the like in the ge desired rotational movement. The one from the wave outgoing pin then acts through the connecting elements directly or indirectly with the outer piston stages, the connecting elements between the pin and the indirectly or directly with the step piston Ele elements are essentially unchangeable. Under essentially Lichen is unchangeable to understand that depending on the position of the pin of each connecting element in certain Circumference undergoes a change in length. These changes in length tion is provided by the connecting elements themselves or by the Piston stages outgoing sections added.

The connecting elements preferably consist of steel resisted thongs. Ropes or the like are also possible. If the sections starting from the outer piston stages to absorb the change in length, they can be elastic, preferably be designed as spring bars.  

After a particularly noteworthy self-discovery Design is provided that the interaction between sections starting from the outer piston stages and connection set in translation by the pin elements via pneumatically or hydraulically operated cylinders that interact with the sections when starting and withdrawn for decoupling. Here are the cylinders preferably on a parallel to the longitudinal axis of the stepped piston Movable carriage arranged, which in turn with those of the Pin outgoing fasteners is connected. The Storage of the carriage can be done directly on the motor house.

Further details, advantages and features of the invention ben not only from the claims to be found characteristics - for themselves and / or in combination - but also from the following description of the drawing preferred preferred embodiments.

Show it:

Fig. 1 is a sectional view of a free-flight-piston engine having a first embodiment of a starter,

Fig. 2 is a plan view of the starter of Fig. 1 and

Fig. 3 is a sectional view through a free-flight piston engine with another embodiment of a starter.

In the figures , in which the same elements are provided with the same reference numerals, a free-flight piston engine is shown, as can be seen from DE-OS 30 29 287. In this regard, reference is made to the disclosure in this regard. The motor ( 10 ) has a stepped piston ( 14 ) arranged in a motor housing ( 12 ) with outer piston steps ( 16 ) and ( 18 ) and an inner step ( 20 ). The inner stage ( 20 ) is movable within a pre-compressor chamber ( 22 ), from which the pre-compressed fuel mixture flows through channels ( 24 ) and ( 26 ) in combustion chambers ( 28 ) and ( 30 ). Pre-compressor rooms ( 22 ) and combustion chambers ( 28 ) and ( 30 ) could of course be replaced. The in the channels ( 24 ) and ( 26 ) extending Kolbenmit telstücke ( 30 ) and ( 32 ) have the same function as a valve.

In order to start a corresponding engine ( 10 ), Invention is provided according to the fact that from the outer piston stages ( 16 ) and ( 18 ) sections ( 36 ) and ( 38 ) emanate from the connecting elements ( 40 ) and ( 42 ) with a Pins ( 44 ) are connected, which is eccentrically and rotatably mounted in its own rotatably mounted shaft, which can be formed as cylinder sections ( 46 ) and ( 48 ). The pin ( 44 ) with the cylinder sections ( 46 ) and ( 48 ) consequently represents a kind of crank drive, which in turn can be set in rotation via a starter motor, not shown. The connec tion elements ( 40 ) and ( 42 ) are fixed in place with the sections ( 36 ) and ( 38 ) or held by these cylindrical elements ( 50 ) and ( 52 ). If the crank mechanism ( 44 ), ( 46 ), ( 48 ) is now set in rotation, this movement is converted into a translational movement, as a result of which the stepped piston ( 14 ) is set in vibration.

In order to accommodate the length change of the connecting elements ( 40 ) and ( 42 ) to the sections ( 50 ) and ( 52 ) depending on the position of the pin ( 44 ), the former are designed to a certain extent to be elastic. Steel-reinforced belts are therefore particularly suitable. Ropes or the like are of course also possible. Of course, the connecting elements ( 40 ) and ( 52 ) can also be rigid. In this case, the sections ( 50 ) and ( 52 ) or the sections ( 36 ) and ( 38 ) extending directly from the outer piston stages ( 16 ) and ( 18 ) must be elastic to a certain extent. The latter can preferably be spring bars.

FIG. 3 shows an embodiment of the invention that is particularly noteworthy. Thus, the crank mechanism consisting of the pin ( 44 ) and the cylinder sections ( 46 ), ( 48 ) sets a carriage ( 54 ) in translation, which carries hydraulically or pneumatically actuated cylinders ( 56 ) and ( 58 ), their pistons ( 60 ) and ( 62 ) interact with the sections ( 36 ) and ( 38 ) of the outer piston stages ( 16 ) and ( 18 ).

In the exemplary embodiment, the pistons ( 60 ) and ( 62 ) are extended, ie they rest on the inner surfaces of the sections ( 36 ) and ( 38 ). If the crank mechanism ( 44 ), ( 46 ) and ( 48 ) is now set in rotation, the slide ( 54 ) is set in a back and forth movement parallel to the longitudinal axis of the stepped piston ( 14 ), which moves on the stepped piston ( 14 ) is transmitted itself. This will start the engine. Then, by pulling back the pistons ( 60 ) and ( 62 ), the starter can be coupled, so that the stepped piston ( 14 ) is exposed.

According to the invention, the cranks ( 46 ) and ( 48 ) can of course be used to tap the work obtained by the combustion. In other words, this translational movement of the stepped piston ( 14 ), which is converted into a rotational movement, is tapped.

Claims (7)

1. Starter for a free-floating stage piston aufwei send engine with existing between the outer piston stages pre-compressor and combustion chambers, characterized in that an eccentrically and rotatably mounted pin ( 44 ) is arranged in a rotated shaft ( 46 , 48 ) Via connecting elements ( 40 , 42 ) with the outer piston stages ( 16 , 18 ) or from these starting sections ( 36 , 38 ) and / or with these interacting elements ( 56 , 58 , 60 , 62 ) is connected such that the rotary movement can be converted into a translation movement. 2. Starter according to claim 1, characterized in that the connecting elements ( 40 , 42 ) immobile with both the pin ( 44 ) and with the piston stages ( 16 , 18 ) or the outgoing sections ( 36 , 38 ) or the Elements ( 56 , 58 , 60 , 62 ) are connected. 3. Starter according to at least claim 1, characterized in that the connecting element ( 40 , 42 ) and / or the outgoing from the outer piston step ( 14 , 16 ) section ( 36 , 38 ) depending on the position of the pin ( 44 ) changing distance between this and the outer Kol benstufen and / or the outgoing sections or the elements ( 56 , 58 , 60 , 62 ) compensates. 4. Starter according to at least claim 1, characterized in that the connecting element ( 40 , 42 ) is preferably a steel-reinforced belt. 5. Starter according to at least claim 1, characterized in that the outgoing from the outer piston stage ( 16 , 18 ) section ( 36 , 38 ) is a rod spring-like element. 6. Starter according to at least claim 1, characterized in that the elements are preferably on a carriage ( 54 ) arranged pneumatically or hydraulically operated cylinders ( 56 , 58 , 60 , 62 ), the carriage by means of the pin ( 44 ) starting Connecting elements ( 40 , 42 ) can be displaced in a reciprocating movement running parallel to the longitudinal axis of the stepped piston ( 14 ). 7. Starter according to claim 6, characterized in that the pistons ( 60 , 62 ) of the cylinders ( 56 , 58 ) for Ent coupling the starter in engagement with the outgoing from the outer piston stages ( 16 , 18 ) sections ( 36 , 38 ) reach.