JPH0322525Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an output turbine in which the output of a power turbine operated by all or part of exhaust gas generated from an engine is transmitted to the main shaft of the engine. The present invention relates to a reciprocating internal combustion engine with a turbine.

[Conventional technology]

Conventionally, in reciprocating internal combustion engines (hereinafter referred to as engines) such as diesel engines or gasoline engines,
Many devices have been developed that utilize the exhaust gas of an engine to operate a power turbine and transmit the output to the main shaft of the engine, thereby effectively utilizing the energy of the exhaust gas.

As such devices, the following three types of devices are known.

(1) A device that directly introduces the entire amount of engine exhaust gas into the output turbine.

(2) A device in which the entire amount of engine exhaust gas is introduced into the supercharging compressor driving turbine, and then the exhaust gas from the supercharging compressor driving turbine is introduced into the output turbine.

(3) A device that introduces part of the engine exhaust gas into the supercharging compressor-driven turbine and the other part into the output turbine.

In the various devices described above, the output of the power turbine is transmitted directly or via suitable power transmission means to the main shaft of the engine.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional reciprocating internal combustion engine with a power turbine, the exhaust gas discharged from the top of the engine is used to operate the power turbine.
Since the output of the power turbine is transmitted to the main shaft located at the bottom of the engine, the following problems arise.

That is, in the above engine, when the output turbine is placed close to the main shaft, the power transmission means from the output turbine to the main shaft is downsized, but the high temperature and high pressure exhaust gas from the engine is guided to the output turbine. It becomes necessary to route the exhaust gas pipe for a long time from the top of the engine to near the bottom, which complicates the structure of the engine and makes the engine extremely large.

Furthermore, when the above-mentioned reciprocating internal combustion engine with an output turbine is used as a large engine with high horsepower such as a marine engine or a stationary engine, the overall height of the engine becomes considerably high, and the large amount of exhaust gas generated is properly controlled. In recent years, the inner diameter of the exhaust gas conduit for exhausting exhaust gas from the engine and introducing it into the power turbine has become larger, making the engine even larger, which has become a major problem in practical use.

On the other hand, when the power turbine is disposed above the engine, the means for transmitting power from the power turbine to the main shaft becomes complicated and large, which significantly increases the cost of manufacturing the engine.

This invention attempts to solve the above-mentioned problems, and by making it possible to reliably transmit the output of the output turbine to the main shaft using a power transmission means with a simple structure, the structure of the engine can be simplified and downsized. turned into
An object of the present invention is to provide a reciprocating internal combustion engine with an output turbine, which improves operability and reliability, and reduces manufacturing costs.

[Means for solving problems]

Therefore, the reciprocating internal combustion engine with a power turbine of the present invention is provided with a power turbine operated by the exhaust gas in the exhaust system of the reciprocating internal combustion engine, and the power turbine is disposed near the top of the internal combustion engine. , a camshaft for opening and closing intake and exhaust valves, the output shaft of the output turbine being disposed above the middle stage of the internal combustion engine and connected to the main shaft of the engine via an interlocking mechanism;
They are characterized in that they are connected directly or via an appropriate connection means.

[Effect]

In the reciprocating internal combustion engine with a power turbine of the present invention described above, when the power turbine is operated by exhaust gas generated from the exhaust system of the reciprocating internal combustion engine, the output of the power turbine is directly transmitted from the output shaft of the power turbine. The signal is transmitted to the camshaft via an appropriate coupling means, and is further transmitted to the main shaft by serving as an interlocking mechanism between the camshaft and the main shaft.

〔Example〕

The reciprocating internal combustion engine with a power turbine of the present invention will be explained below with reference to the drawings. Figures 1 and 2 show a reciprocating internal combustion engine with a power turbine as a first embodiment of the present invention, and Figure 1 shows the reciprocating internal combustion engine with a power turbine as a first embodiment of the present invention. A schematic front view, and FIG. 2 is a schematic side view of the internal combustion engine main body.

As shown in FIG. 1, a plurality of cylinder covers 11 are provided on the upper part of the engine body 10 above the exhaust valves of each cylinder (not shown).
The insides of these cylinder covers 11 are connected to an exhaust reservoir 13 via exhaust branch pipes 12, respectively.

This exhaust reservoir 13 is connected to a supercharging compressor driving turbine 20 via an exhaust gas conduit 23, and the supercharging compressor driving turbine 20 is connected to a supercharging compressor 21 via a supercharger shaft 22. be done.

Further, the exhaust gas conduit 24 from the supercharging compressor drive turbine 20 is led to an output turbine 30 disposed near the upper part of the internal combustion engine, and from this output turbine 30, the exhaust gas conduit 24 is connected to the outside. A conduit 34 is provided.

The above-mentioned cylinder cover 11, exhaust branch pipe 12, exhaust reservoir 13, and exhaust gas conduits 23, 2
4 and 34 constitute an exhaust system of the reciprocating internal combustion engine.

On the other hand, the camshaft 19 is located at a relatively high position compared to the main shaft 14 in order to open and close the intake valve and exhaust valve at the upper end of the cylinder of this internal combustion engine. It is located above the middle stage of the engine. The camshaft 19 is connected to the main shaft 14 of the internal combustion engine main body 10 via an interlocking mechanism, and this interlocking mechanism is configured as follows. That is, as shown in FIGS. 1 and 2, the camshaft gear 18 fixed to the camshaft 19 meshes with the intermediate gear 17, and the intermediate gear 17 meshes with the intermediate gear 16.
The intermediate gear 16 further meshes with the main shaft gear 15 fixed to the main shaft 14. These camshaft gears 18 and intermediate gears 1
7, 16 and the main shaft gear 15 constitute the interlocking mechanism. Note that a cam, a fuel pump, and the like for driving an air supply valve and an exhaust valve (not shown) are connected to the camshaft 19.

Further, the output shaft 33 of the output turbine 30 is connected to an output gear 32 via a reducer 31, and the output gear 32 further meshes with the gear 18 with a camshaft.

And these reducer 31 and output gear 3
2, the output shaft 33 of the output turbine 30 and the camshaft 19
The means for connecting with is constructed.

Since the reciprocating internal combustion engine with an output turbine as the first embodiment of the present invention is configured as described above, as shown in FIG. is collected in an exhaust reservoir 13 through an exhaust valve (not shown), through the cylinder cover 11, and through an exhaust branch pipe 12.

The exhaust gas is then introduced into the supercharging compressor drive turbine 20 through the exhaust gas conduit 23, and part of its useful energy is used to drive the supercharging compressor drive turbine 20. As a result, the supercharging compressor driving turbine 20 further drives the supercharging compressor 21 via the supercharger shaft 22, and the supercharging compressor 21 creates a charge air reservoir (not shown) and a charge air valve. Compressed air is supercharged into the combustion chamber of the internal combustion engine main body 10 via.

The exhaust gas discharged from the supercharging compressor drive turbine 20 further passes through an exhaust gas conduit 24,
After being introduced into the power turbine 30 and consuming its remaining useful energy to drive the power turbine 30, it is discharged to the outside through the exhaust gas conduit 34.

The output turbine 30 is driven by the exhaust gas, and the output shaft 33 is rotationally driven. However, the rotation speed of the output shaft 33 is reduced by the reducer 31 to match the rotation speed of the camshaft 19. The rotation of the output gear 32 is transmitted to the camshaft 19 via the camshaft gear 18.
is transmitted to.

On the other hand, the camshaft 19 is rotationally driven by the main shaft 14 via the interlocking mechanism, but as described above, the rotation of the output turbine 30 is transmitted to the camshaft 19, so that as a result, the rotation of the main shaft 14 is driven by the output turbine. 3
This will be aided by 0. In this way, the output of the power turbine 30 is transmitted to the main shaft 14.

As described above, in the reciprocating internal combustion engine with a power turbine as the first embodiment of the present invention, the output of the power turbine 30 is
The power is transmitted to the camshaft 19 via the camshaft gear 18, and the output turbine 30
is arranged near the top of the internal combustion engine main body 10, and the camshaft 19 and the output turbine 30, which are located above the middle stage of the internal combustion engine, are in a close relationship with each other, so the advantage is that they can be easily connected. There is.

In addition, by disposing the output turbine 30 near the top of the internal combustion engine, the exhaust pool 13 and the supercharging compressor drive turbine 2 are located at a relatively high position.
The exhaust gas pipes 23, 24, 34 that connect the output turbine 30 and the output turbine 30 and guide the exhaust gas to the outside do not need to be routed for a long time, and therefore the structure of the reciprocating internal combustion engine is simplified. As the device becomes smaller, the effort and cost required for its maintenance will also be reduced.

Further, when assisting the rotation of the main shaft 14 using the output of the output turbine 30, the output turbine 30
As part of the power transmission means provided between the output turbine 30 and the main shaft 14, an interlocking mechanism for interlocking the camshaft 19 with the main shaft 14 is also used. Compared to the case where a power transmission means is provided, the mechanism of the power transmission system is greatly simplified, the noise and vibration generated in the mechanism are reduced, and its reliability is greatly improved. This results in further miniaturization, which in turn significantly reduces the cost of manufacturing.

In addition, in FIG. 2, the teeth of each gear are omitted from illustration.

Next, a reciprocating internal combustion engine with an output turbine as a second embodiment of the present invention will be described. FIG. 3 is a front view schematically showing a part thereof.

As shown in FIG. 3, a reciprocating internal combustion engine with a power turbine as a second embodiment of the present invention has a configuration substantially similar to that of the first embodiment (see FIG. 1).
The exhaust reservoir 13 and the supercharging compressor drive turbine 20 are connected via an exhaust gas conduit 23',
An exhaust gas conduit 34' from the supercharging compressor drive turbine 20 communicates with the outside.

Further, the output turbine 30 is connected to the exhaust gas reservoir 13 via an exhaust gas conduit 25' having a control valve 35' interposed therein, and an exhaust gas conduit 36' from the output turbine 30 is connected to an exhaust gas conduit 34'. By being connected, it communicates with the outside world.

In addition, in FIG. 3, the previously mentioned symbols are the first and second
It shows almost the same part as the figure.

Since the reciprocating internal combustion engine with an output turbine as the second embodiment of the present invention is configured as described above, the exhaust gas in the exhaust reservoir 13 is passed through the exhaust gas conduit 23' to the turbocharging compressor-driven turbine. 20 while being introduced to the power turbine 30 via the exhaust gas conduit 25'. At this time, the amount of exhaust gas flowing into the output turbine 30 is
5' is adjusted as appropriate.

Furthermore, each supercharging compressor drive turbine 2
0. The exhaust gas that has driven the turbine 30 is discharged to the outside through exhaust gas conduits 34' and 36'.

In this way, also in the second embodiment of the present invention described above, the supercharging compressor 21 is driven by the supercharging compressor driving turbine 20, and the camshaft 19 is connected to the output shaft 33, the reducer 31, the output Since the rotation is assisted by the output turbine 30 via the gear 32 and the gear 18 with a camshaft, the effective energy of the exhaust gas drives the supercharging compressor 21 and the camshaft 19 and the camshaft 19. The existing camshaft is used to assist the rotation of the main shaft 14 connected via the interlocking mechanism, and the existing camshaft is also used appropriately to transmit the output of the output turbine 30 to the main shaft 14. Almost the same effect as the first embodiment can be obtained. Note that the reciprocating internal combustion engine with a power turbine of the present invention may be an engine in which all the effective energy of exhaust gas is used to drive the power turbine 30 without having a turbocharging compressor driving turbine. .

Furthermore, in the coupling means for transmitting power from the output turbine 30 to the camshaft 19, the gear with a camshaft 18 and the output gear 32 do not mesh directly, but due to the arrangement of the output turbine 30 and the camshaft 19. Accordingly, the camshaft 19 and the output shaft 33 may be directly connected only through the reducer 31, or other gears (not shown) may be interposed between the gear 18 with the camshaft and the output gear 32, which mesh with each of them. may be equipped.

[Effect of idea]

As detailed above, in the reciprocating internal combustion engine with a power turbine of the present invention, the exhaust system of the reciprocating internal combustion engine is equipped with a power turbine that is operated by the exhaust gas, and the power turbine is installed near the top of the internal combustion engine. arranged so that the output shaft of the output turbine is directly connected to a camshaft for opening and closing the supply and exhaust valves, which is arranged above the middle stage of the internal combustion engine and connected to the main shaft of the engine via an interlocking mechanism, Or, by arranging the output turbine near the upper part of the reciprocating internal combustion engine body with a simple configuration in which the output turbine is connected via an appropriate connecting means, the piping of the exhaust system can be extremely simplified. Miniaturization of the above reciprocating internal combustion engine
Not only is the weight reduced, but the labor and expense required for its maintenance are also significantly reduced.

In addition, as part of the power transmission means for transmitting the output of the output turbine to the main shaft, the camshaft, which is located at a relatively high position like the output turbine, can be used easily and appropriately, and the main shaft and camshaft can be connected. The linked interlocking mechanism is efficiently used, which greatly simplifies the mechanism of the power transmission means, reduces the noise and vibration generated in the mechanism, and significantly improves the reliability of its operation. Moreover, it also has the advantage that the cost required for manufacturing it is significantly reduced.

[Brief explanation of the drawing]

Figures 1 and 2 show a reciprocating internal combustion engine with an output turbine as a first embodiment of the present invention.
Figure 2 is a schematic front view of the engine, Figure 2 is a schematic side view of the internal combustion engine main body, and Figure 3 shows a part of a reciprocating internal combustion engine with an output turbine as a second embodiment of the present invention. It is a front view shown typically. 10...Internal combustion engine main body, 11...Cylinder cover, 12...Exhaust branch pipe, 13...Exhaust reservoir, 14
...Main shaft, 15...Gear with main shaft, 16, 17...
...Intermediate gear, 18...Gear with camshaft, 19...
Camshaft, 20...Supercharging compressor drive turbine, 2
1...Supercharging compressor, 22...Supercharger shaft, 23,
23', 24, 25'...exhaust gas pipe, 30...
Output turbine, 31...Reducer, 32...Output gear, 33...Output shaft, 34, 34'...Exhaust gas pipe, 35'...Control valve, 36'...Exhaust gas pipe.

Claims (1)

[Scope of utility model registration request] The exhaust system of the reciprocating internal combustion engine is provided with an output turbine operated by the exhaust gas thereof, and the output turbine is disposed near the top of the internal combustion engine, and the output shaft of the output turbine is located above the middle stage of the internal combustion engine. The camshaft for opening and closing the intake and exhaust valves, which is located above and connected to the main shaft of the engine via an interlocking mechanism,
Or a reciprocating internal combustion engine with an output turbine, characterized in that the engine is connected via an appropriate connection means.