JPS5823481B2 - Fukushiki Engine Souch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blind drive system, and more particularly to a system for driving a common output shaft by a plurality of small, preferably high speed combustion engines of a high efficiency type.

Once mass-produced, inexpensive engines (generally for motorcycles, outboard engines, small automobiles, etc.) are available on the market, various devices are used to link these engines into a single device containing several engines. That has been tried.

This is because small engines of this type have superior power in terms of price than large engines of the same type.

This fact is especially true for efficiency/weight and efficiency/cylinder volume ratios.

Efficiency/cylinder volume ratio is, of course, especially important when considered in relation to competitive engines, as these engines often have a cylinder volume that is determined to be within a specified class. This is because it is limited to

Many devices have been tried, but the results have been extremely pessimistic.

When engines of the type described above are connected slightly side by side using previously attempted devices, failures in each engine (
natural resonance, asymmetric state during combustion, degree of irregularity, etc.)
It has been experienced that an interaction occurs between the two engines which often results in rupture of the device sooner than the respective engine can add efficiency and momentum, and at the same time the engines are sometimes destroyed.

According to the invention, a device is obtained in which accelerated engine wear and negative effects on service life are not experienced;
And the gearing provided in this device prevents interference from separate engines interacting with each other.

These engines have a
It has at least one transmission.

For use under heavy loads, primarily in the technical field of ships and motor-driven rail vehicles, it is possible to take advantage of the many advantages afforded by a drive arrangement comprising several engines driving the same shaft. there were.

Conical belts and interlocking devices were used to good effect.

In order to dampen the stresses acting on the linkages and shafts during coupled operation and speed change operations, and when operating in the medium speed range, for example for heavy diesel engines, a strong moment of inertia is required. In a single or dual engine, a fluid coupling device is provided between the engine and the transmission in order to balance the torques generated from the individual piston strokes of the engine that would otherwise generate high stresses. often occurs.

In both cases, this results in the shaft and the transmission element being able to be constructed somewhat more compactly.

An example of such a construction is illustrated and described in Swedish patent no. It is described as being selectively connectable to a common output shaft.

This linkage includes two planetary gear sets to which a gas turbine and a diesel engine are connected via a separable freewheel mechanism.

In one embodiment, a diesel engine is coupled directly to this gearing, and in another embodiment via a hydraulic torque converter.

The above facts show that the connections in such heavy embodiments are for a completely different purpose than the device according to the invention.

The light weight and usefulness of the invention can be obtained in connection with embodiments of the invention, in which a coupling device for selective engagement and disengagement of the drive motor can be used at the same time.

In this way, the advantage is obtained that an engine with a tendency to break is disconnected, thereby preventing a total break.

This feature is especially important for highly balanced engines where breakouts are common.

Additionally, additional engines can be engaged as needed;
From an efficiency and environmental point of view, the engine can be operated in each driving state with the most appropriate effect.

Only one starter motor needs to be placed on just one engine, which can be engaged to start the remaining engines.

In accordance with the present invention, exemplary embodiments of such engines that can be used in engine arrays including multiple engines have high rotational speeds and are preferably of the two-stroke type.

Other objects of the invention will become apparent from, and will be understood by those skilled in the art, from the following description and drawings of embodiments of the invention, as well as from the claims.

The object of the invention is achieved by the characteristic features of the invention as defined in the claims.

One embodiment of this invention will be described below with reference to the drawings.

A schematic of this device is shown in Figure 1A.

The four engines 1, 5, 8, 12 can be connected to one common output shaft 14 by means of the transmission according to the invention.

Output shaft 17,5/ of each engine. 8', 12' are equipped with impellers 2, 4, 9.11, these impellers are:
It cooperates with the transmission housings 3 and 10 having turbine wheels arranged back to back.

The transmission housings 3, 10 are permanently connected to the common output shaft 14 by transmission members 6, 7, such as drive chains, drive belts, gear transmissions, etc.

The output shaft 14 passes through the cover 24 and carries an auxiliary device 13, such as an actuating pump, on its opposite outer part.

On the left side of FIG. 2, various auxiliary devices indicated by 13 in FIG. actuated pumps 26 to 29 which supply the working medium from 22 to the transmission, an injection pump 30 actuated by the gear mechanism 32 and which injects the working medium from the transmission into the filter 20;
31, oil cooler 21 that cools the oil from the filter 20;
It includes an oil container 22 for storing oil from an oil cooler 21), and a starting pump 23 which is driven independently and which supplies working medium from the oil container 22 to the transmission when starting the transmission.

Reciprocating valves 16, 17, 18, 19 are provided between the oil container 22 and the supply pumps 26-29, and the supply of working medium to the supply pumps 26-29, which are constantly driven by the output shaft 14, is carried out as described above. Controlled by a valve.

A separate and independently driven starting pump 23 connects between the container 22 and the inlet 33.

The working medium inlets to the transmission are indicated in the figure by 34 for engine 5, 35 for engine 12, 36 for engine 8 and 33 for engine 1, each of these inlets being connected to a supply pump 26. .about.29, while the infusion pump 30.31 is coupled to the third illustrated outlet 25 from the cover 24 and a corresponding outlet (not shown in FIG. 2) in the rest of the cover.

A feed pump 15 is coupled to both inlets 37.3B;
A lubricant is supplied to each transmission member 6,1.

The output shaft 14 is journalled in the cover 24 by bearings 40, 42 and is inserted in its intermediate part into a compound shaft 39 on which gears 41, 44 are mounted.

The gear 41 is engaged with a transmission member 6, which may be a suitable chain comprising a plurality of laterally arranged link belts, and the transmission member 6 is also engaged with a gear 47 provided in the transmission housing 3. will be combined.

Identical transmission elements 1 engage in a similar manner with the gear wheels of the compound shaft 39 and with the gear wheels (not shown) of the transmission housing 10.

In the device shown in FIG. 2, the lower portion of the output shaft 14 is identical to the upper portion of the output shaft 14, but is mounted in an inverted relationship due to the fact that the chino 1 is meshed with the gear 44. , only the upper part shown in FIG. 2 will be described in detail.

FIG. 4 shows one half of a dual engine according to the invention, in which the flow paths of the common working medium for working, cooling and lubricating are indicated by arrows.

The flow path of the working medium is indicated by an arrow in the left part of the figure;
This working medium is entered by the supply pump 21 of FIG. 2 in the channel A through the inlet 33 and then flows into the transmission housing 3 with a peripheral outlet B in the appropriate channel indicated by the arrow. , the purpose of this outlet B will be discussed further below.

Most of the working medium flow then passes through the impeller 2 in the gap C.
and the turbine wheel 49 and then into the turbine blades, where the impeller transmits motion between the two parts of the turbine blades with the characteristics of the turbine structure;
The working medium then passes through the gap to the central outlet H and enters the cover at the peripheral outlet E.

If the constant pressure and flow rate at the outlet H are very small and the majority of the discharge flow is discharged from the outlet B, it will take a long time for the transmission to start moving, whereas if the fluid discharge only takes place at the outlet E. , the turbine circuit is never empty.

A suitable ratio for this fluid discharge is therefore determined such that the majority of the flow passes through outlet E and a small portion thereof through outlet B.

For the illustrated embodiment of the invention, it has been determined, partly by calculation and partly by experimental means, that the most suitable ratio is for 75 parts of the exhaust stream to pass through outlet E and 25 parts to exit B. This was experienced.

However, of course, these values may vary entirely depending on the requirements of each case, and the invention is not limited to these values.

The inlet 31 for the lubricating medium is shown on the right side of FIG.
This working medium is supplied by the pump 15 seen in FIG. 2 and enters the device at the inlet F for cooling and lubricating the gearwheel 41 and the chino 6.

It will be seen that the pump 15 also delivers lubricant to the lubricant inlet 38 shown in FIG. 2 for cooling and lubricating the chino 1.

The transmission housing 3 is supported on a short shaft attached to the cover 24 by bearings 45, 4B.

The two impellers 2, 4 are connected to each other and to the transmission housing 3
It is rotatable freely and independently relative to the engine, and is attached to the output shafts 1', 5' of the engine.

The function of the dual engine according to the invention will be explained in detail below with reference to the illustrated embodiment.

The engine 1 of the compound engine is started, for example by a starting motor (not shown), and since the transmission is empty at this point, the engine 1 is switched to the output shaft 14.
is separated from.

However, the impeller 2 is fixedly connected to the output shaft 1' of the engine 1 and follows the rotational movement of the shaft.

The valve 18 is opened and the separately driven starting oil pump 23 is started to pump the working medium into the inlet 33 and further into the circulation path indicated by the arrow, where the working medium in the gap C is connected to the engine 1. It flows into the cavity between the impeller 2 and the turbine wheel 49 driven by the output shaft.

The working medium is then discharged through the gap to the outlet E in the flow path indicated by the arrow.

When the turbine transmission is sufficiently filled with working medium, the transmission housing 3 follows the rotation of the impeller 2, since the turbine wheel 49 is fixedly connected to the transmission housing 3.

Therefore, the gear 41 of the transmission housing 3 drives the chino 6, which transmits rotational motion to the output shaft 14 through the gear A1 of the compound shaft 39.

The output shaft 14 starts to rotate and drives the pump 15° 26-31, which together with the output shaft 14 rotates so that the pump 21 is connected to the inlet 3 via the already opened valve 18.
Supply oil to 3.

The independently driven pump 23 is stopped and does not have to be used until the next start-up of the transmission.

For example, the engine 5 is now connected to the drive train, the reciprocating valve 16 is opened and the pump 29 delivers working medium to the inlet 34 which is connected to the impeller 4 driven by the rotational movement of the transmission housing 3. It flows according to a predetermined flow path into the cavity between the turbine wheel 50 and when a sufficiently high fluid pressure is built up therein, the turbine wheel 50 follows the rotational movement and starts the engine 5. .

Thus, either of the further engines 12, 8, on demand, initiates circulation of the working medium by means of the respective pump 28, 26 to couple the reciprocating valve 17.
It is activated in a corresponding manner by opening 19.

The above description of the structure and function of this device is
The two engines are shown disconnected from the output shaft 14 and all remaining engines of the transmission before their respective reciprocating switches are actuated.

When it is desired to disconnect one engine, the reciprocating valve controlling the media flow to the corresponding transmission is shut off.

Since no working fluid is then supplied, the transmission is emptied by the concentrated flow through outlet B and the engine is disconnected from the transmission.

Although the illustrated embodiment uses liquid cooling for the drive chain, it is clear that air cooling could be applied to the device.

According to the invention, the engines included in this dual engine apply additional torque to a common output shaft, and the engines can be coupled and disconnected from the common output shaft, respectively, thereby making it possible to connect and disconnect the engines from the common output shaft, as mentioned at the beginning of the description. Those skilled in the art will appreciate that a transmission device is provided in which the objectives of the present invention are achieved.

Suitable areas of application for the compound engine according to the invention are, for example, boats of various sizes, land vehicles, cushion craft, snow vehicles and airplanes, and especially when applied to helicopters, which have a high inertia without the need for special coupling devices. It should be noted that the acceleration of a large mass body, ie the main rotor, with .

Of course other applications such as industrial installations are also possible for this invention.

It will be appreciated that the transmission device can be used in accordance with the invention to distribute torque from a common driven input shaft to power receiving devices such as pumps.

However, the main technical field of this invention is currently found in the transportation field.

The embodiment described and shown herein is to be treated only as one preferred example of the invention, as many changes and modifications in structure, as well as in function, can be effected by those skilled in the art. The invention includes each structure falling within the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a dual engine device according to the present invention, and Fig. 2 is an embodiment of the invention, in which the upper half of the device is shown in a cutaway view, and the lower half is shown with the cover of the transmission device removed. The transmission housing is shown removed, and the pump and conduits for the working medium are shown diagrammatically on the left side of the figure; FIG. 3 is a side view of the device of FIG. 2; FIG. 4 is a detail of the upper half of FIG. FIG. 3 is a cross-sectional view showing the flow path of a combined working, cooling and lubricating medium; 1.5, 8, 12...engine, 2,4,9゜11...impeller, 3,10...transmission housing, 6.1...・Transmission member, 13...
...Auxiliary device, 14...Common output shaft, 15.
...Feed pump, 16-19...Valve, 2
2...Oil container, 23...Oil pump, 2
4...Cover, 25...Exit, 26~
29...Feeding pump, 33-36...
Entrance, 37, 38...Entrance, 39...
Composite shaft, 41...Gear, 41...Gear, 49.50...Turbine wheel.

Claims (1)

[Claims] 1. A plurality of engines are equipped with an propeller that rotates as a driving force, and the emperor is attached to a transmission housing connected to a common output shaft via a transmission member so as to rotate together with the transmission housing. Working pumps are connected to the output shaft, and these working pumps are adapted to supply working medium to each pair of cooperating engine and turbine wheels by actuation of their associated valves, and furthermore, during start-up, the said working pumps Dual engine transmission, characterized in that it comprises a starter pump which is operated separately and independently of the working pump for supplying the working medium to the engine and the turbine.