JPH0238770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a positive displacement internal combustion engine equipped with a compressed air extraction device.

<Prior art> Conventionally, a compressor was attached to the engine.

<Problems to be Solved by the Invention> In the case of the above-mentioned conventional structure, since a compressor is required, it is expensive, and the entire device becomes complicated and large. A clutch is also required to prevent the compressor from running idly when other equipment is driven by engine power.

Therefore, an object of the present invention is to omit the compressor by obtaining compressed air from the combustion chamber of the engine.

Furthermore, in an engine equipped with a compressed air extraction device, when extracting compressed air during no-load operation, the engine stalls when the engine has a small displacement and does not have enough room (for example, a displacement of about 150 c.c.). Sometimes.

Therefore, an object of the present invention is to prevent the engine from stalling by applying a load to the engine when extracting compressed air.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a compressed air outlet 10 in the combustion chamber 8, as shown in FIG.
open the compressed air outlet 10 and connect the compressed air take-off valve 11 to the compressed air outlet 10.
A compressed air conduit 14 is led out from the compressed air outlet 10, and a compressed air outlet 15 is provided at the tip of the compressed air conduit 14.
5 is provided with a load applying device 26, and the compressed air take-off valve 11 and the load applying device 26 are interlocked and connected so as to apply a load to the engine 1 when compressed air is taken out.

<Function> When the load applying device 26 applies a load to the engine 1 during no-load operation, the output of the engine 1 increases due to the speed regulating action of the governor (not shown). In conjunction with this, the compressed air take-off valve 11 opens, and the compressed, combusted and expanded high-pressure gas in the combustion chamber 8 is ejected from the compressed air outlet 15 through the compressed air conduit 14, and can be used as compressed air. .

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a partially longitudinal front view of a four-stroke engine equipped with a compressed air extraction device.

In this figure, numeral 1 indicates the entire engine, 2 is the cylinder block, 3 is the cylinder head, 4 is the cylinder body, 5 is the cylinder, 6 is the piston, 7 is the spark plug, 8 is the combustion chamber, and 9 is the compressed air outlet. The device 26 is a load applying device.

The engine 1 has an engine body 4 formed by mounting and fixing a cylinder head 3 above a cylinder block 2 formed in a pair with a crankcase (not shown).

A piston 6 is housed in the cylinder 5 of the cylinder block 2 so as to be vertically slidable.
A combustion chamber 8 is formed above and between the cylinder head 3 and the ignition plug 7 facing therein.

The cylinder head 3 to which the spark plug 7 is attached is provided with a compressed air take-out device 9. This compressed air take-out device 9 has a compressed air outlet 10 in the upper center of the combustion chamber 8, and is screwed into the compressed air outlet 10. Compressed air take-off valve 11 and compressed air take-off valve 11
a valve opening operation lever 13 for opening the valve main 12; a compressed air conduit 14 for taking out combustion expansion gas from the combustion chamber 8 to the outside when the compressed air take-off valve 11 is opened;
The compressed air outlet 15 is attached to the tip of the compressed air conduit 14, and the valve body of the compressed air outlet valve 11 is operated by operating the opening/closing operation lever 13 of the compressed air extraction device 9 with a brake lever 30, which will be described later. 1
By pushing open 2, the high-pressure combustion gas that has been combusted and expanded within the combustion chamber 8 can be forcefully discharged from the outlet 15 via the compressed air conduit 14.

The load applying device 26 is a camshaft 25 of the engine 1.
is used as an output shaft, and a braking force is applied to this output shaft 25 to apply a load.
As shown in the figure, a part of the outer circumferential surface 27a of the power output drive pulley 27 fixed to the output shaft 25 is formed to have a wide width, and a brake band 28 is wrapped around it, and the brake lever 30 is pivotably supported. By operating the brake lever 30 in the direction of the arrow A about the fulcrum 31, the brake band 28 connected to the other end 30a of the brake lever 30 via the tension spring 32 is moved to the outer peripheral surface of the drive pulley 27. 2
7a, and is configured to apply a load to the engine 1.

As shown in the figure, the brake lever 30 and the valve opening operation lever 1 are connected via a release wire 33.
3 is interlocked and connected to the brake lever 30.
By operating the valve opening operation lever 13, the compressed air take-out operation and the load application operation can be performed simultaneously.

When a brake is operated using the brake lever 30 during no-load operation, a load is applied to the engine 1, and the output of the engine 1 is increased according to the load due to the speed regulating action of a governor (not shown).

The engine 1 with the compressed air extraction device configured as described above is used, for example, in the reaping and tying machine 16 shown in FIG.
This section explains the effects when installed in a vehicle. The output shaft 25 of the engine 1 is connected to a reaping section 17 provided at the front half of the reaping and tying machine 16, a tying device 18 attached to the middle section, and a drive wheel 19 provided at the rear, respectively, so as to transmit power. .

Further, the compressed air outlet 15 of the compressed air extraction device 9 is connected to the string suction port 22 of the string supply conduit 21 provided from the vicinity of the string 20 to the banding device 18.
It is aimed at

In addition, the string suction port 2 at the starting end of the binding string supply conduit 21
2 is formed into a bell mouth shape so that it can easily enter the binding cord 20, and the terminal end is connected to the binding device 18.
The opening is made to face the binding string insertion hole 24 of the needle 23.

First, the brake lever 30 is operated to apply a required load to the engine 1 while the binding string 20 is supplied for a sufficiently long length to the string suction port 22 of the binding string supply conduit 21 via the tensioner. Then, the output of engine 1 increases. This brake operation and the valve opening operation lever 13 of the compressed air extraction device 9 are linked to open the valve main 12 of the compressed air extraction valve 11.

When the valve main 12 of the compressed air take-off valve 11 is opened,
High-pressure combustion gas that has been combusted and expanded in the combustion chamber 8 is taken out to the compressed air conduit 14 through the compressed air take-off valve 11, and is then taken out from the compressed air outlet 15 to the binding string supply pipe 21.
It is vigorously ejected toward the string suction port 22 of the string.

In this way, the string suction port 22 of the binding string supply pipe 21
The compressed air blown vigorously flows through the binding string supply conduit 21 that is supplied to the string suction port 22, and supplies the binding string 20 at once to the string insertion hole 24 of the needle 23 of the binding device 18 and inserts it. .

In the above embodiment, the compressed air extraction device 9 is attached to the 4-cycle engine 1, but the compressed air extraction device 9 may of course be attached to the 2-stroke engine 1. be. In addition, the compressed air taken out from the engine 1 has been described as being used as a power source for inserting binding cords, but in addition to this, it can also be used to clean the cutting blades of combine harvesters and binders. It can also be used as a power source to drive a lubricating oil pump that supplies lubricating oil to each moving part of a working machine.

Further, in the above embodiment, the load applying device 26 is attached to the drive pulley 2 attached to the power output shaft 25 of the engine 1.
Although the braking load is applied to the output shaft 25 of the engine 1 by a brake with a brake band 28 wrapped around the brake band 7, the present invention is not limited to this. The load is switched by a transmission clutch and a braking load is applied, or the power output shaft 25
It is conceivable to connect the generated electricity to the generator and attach a heater to the output terminal of the generator via a switch so as to act as a braking load.

<Effects of the invention> As described above, according to the present invention, compressed air is obtained from the combustion chamber of the engine by utilizing the compression action or combustion expansion action of the engine, so the conventional compressor can be omitted and implementation can be carried out at low cost. Not only that, but the entire device can be simplified and downsized.

In addition, when driving other equipment with the power of the engine, it is only necessary to close the compressed air take-off valve, and the conventional clutch for the compressor can be omitted. Furthermore, the configuration can be simplified, downsized, and implemented at low cost. Can be done.

Furthermore, by applying a load to the engine and increasing the output of the engine when extracting compressed air, even a small displacement engine can be prevented from stalling.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a partially longitudinal front view of a four-stroke engine, FIG. 2 is a front view of a power output drive pulley, and FIG. 3 is a schematic perspective view of a binder. 1... Displacement internal combustion engine, 8... Combustion chamber, 10...
...Compressed air outlet, 11...Compressed air outlet valve, 1
4... Compressed air conduit, 15... Compressed air outlet, 25... Power output shaft, 26... Load applying device, 27... Output drive pulley, 28... Brake band.

Claims (1)

[Claims] 1. A compressed air outlet 10 is opened in the combustion chamber 8 of the positive displacement internal combustion engine 1 with a governor, the compressed air outlet 10 is opened and closed by a compressed air take-off valve 11, and a compressed air conduit is connected from the compressed air outlet 10. 14, a compressed air outlet 15 is provided at the tip of the compressed air conduit 14, and a load applying device 26 is provided on the power output shaft 25 of the engine 1, so as to apply a load to the engine 1 when taking out the compressed air. Air take-off valve 11 and load applying device 26
What is claimed is: 1. A positive displacement internal combustion engine with a compressed air extraction device, characterized in that the engine is configured by interlocking and connecting the two. 2. A drive pulley 27 with a load applying device 26 provided on the power output shaft 25, a brake band 28 wound around this drive pulley 27, and this brake band 2.
8 and a handle 30 that presses against the drive pulley 27. A positive displacement internal combustion engine with a compressed air extraction device according to claim 1. 3. A positive displacement internal combustion engine with a compressed air extraction device according to claim 1, wherein the load applying device 26 is constructed by interlocking a working load to the power output shaft 25 via a transmission clutch. 4. The compressed air according to claim 1, in which the load applying device 26 is composed of a generator connected to the power output shaft 25 and a heater connected to the output terminal of the generator via a switch. Positive displacement internal combustion engine with extraction device.