JPH02146271A - Hydraulic pressure generating device - Google Patents

Abstract

PURPOSE:To prevent the contamination of the combustion waste gas into a hydraulic pressure medium and the gasification of the hydraulic pressure medium caused due to heating by dividing the inside of a cylinder into three parts by a pair of pistons performing integrated reciprocating motion so as to form a combustion chamber, an adiabatic chamber and a hydraulic pressure chamber in order from one end. CONSTITUTION:In the execution of a two-cycle engine, a pair of pistons 1, 2 performing integrated reciprocating motion are fitted into a cylinder 3, thereby dividing the inside of the cylinder 3 into three parts; that is, a combustion chamber 4, an adiabatic chamber 5 for blocking heat transmission from the combustion chamber 4 and a hydraulic pressure chamber 6 are formed in order from the end. When the piston 1 is in the low limit position, an exhaust valve 9 is opened so as to exhaust combustion waste gas, and an inlet valve 8 is then opened so as to press mixture into the combustion chamber 4 in order to scavenge the waste gas. The mixture in the combustion chamber 4 is first compressed by the elevation of the pistons 1, 2 accompanied by the press-in of the low pressure liquid into the hydraulic chamber 6 after the opening of the inlet and exhaust valves 8, 9, then ignited by an ignition plug 7, combusted, and the pressure of the liquid rises by the descending motion of the pistons 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for generating hydraulic pressure in a liquid such as oil or water.

(Prior Art) In conventional technology, for example, as seen in hydraulic pumps, hydraulic pressure is usually generated by driving a vane pump, gear pump, or plunger pump using the rotational force of an electric motor. However, the process of obtaining electric power to drive the motor was inefficient, and the process of obtaining hydraulic pressure from electric power also involved a lot of loss.

If power for an electric motor is not available, generate electricity using a gasoline or diesel engine.

This electric power rotates an electric motor and generates hydraulic pressure, but the efficiency of these engines is low and only 20 to 30% of the energy of the fuel can be extracted as output.

Multiplying this by the efficiency of the pump further reduced this value.

The reason for the low output efficiency of conventional engines is that the engine speed is extremely high (2000 to 8000 rpm), so the high temperature and high pressure energy cannot be fully utilized and is released into the atmosphere as waste gas, and the piston The problem was that there was a large amount of energy loss in the process of converting reciprocating motion into rotational motion using the connecting rod and crankshaft.

(K to be solved by the invention) In order to overcome the problems of the prior art as described above, the present invention aims to provide a device that directly converts combustion energy in an internal combustion engine into hydraulic pressure. 1 purpose. A second object of the present invention is to provide a hydraulic pressure generating device that prevents combustion waste gas from being mixed into the hydraulic medium in the device of the present invention. A third object of the present invention is to provide a hydraulic pressure generating device that prevents a hydraulic medium from increasing in temperature and vaporizing due to transfer of combustion heat.

(Means and effects for solving the problems) The present invention is constructed as follows. As shown in Figures 1 to 4, the inside of the cylinder 3 is divided into three by a pair of pistons 1 and 2 that reciprocate integrally, and a combustion chamber 4 is formed in which fuel is burned sequentially from the end.

This is a hydraulic pressure generating device characterized by being constituted by a heat insulating chamber 5 that blocks heat transfer from the combustion chamber 4 and a hydraulic pressure chamber 6 that makes the liquid high pressure. The example in Figure 1 is 2 equipped with an intake valve and an exhaust valve.
This is an example of a cycle engine (two-stroke cycle engine), which uses gasoline, LPG, or LNG as fuel.
The combustion chamber 4 of the device shown in FIG.
Now, when the piston 1 is at the lower limit as shown in the figure, the exhaust valve 9
The combustion chamber 4 is discharged by exhausting the combustion waste gas, and after a slight delay, the intake valve 8 is operated to pressurize the pressurized fuel mixture to scavenge the combustion waste gas and fill the combustion chamber 4 with the fuel mixture. After that, the exhaust valve 9 and the intake valve 8 are closed. Subsequently, low-pressure liquid is applied from the hydraulic pressure source 18 to the hydraulic chamber 6 through the check valve to push up the piston 1 and compress the fuel gas in the combustion chamber 4.

The fuel is ignited and combusted by the spark plug 7 into the combustion chamber 4.
Make the pressure high inside the piston 1. 2 is pushed down integrally to make the liquid in the hydraulic pressure chamber high pressure, and the check valve 16 is pushed through the pressure liquid outflow pipe 14. It is stored in the accumulator 17 via. Another pressure control valve is a sequence valve that detects the elapsed time of the ignition, the pressure in the hydraulic pressure chamber, or the position of the pistons 1 and 2 and uses this as a signal to operate the pilot pressure to open and close. In the configuration of the pressure generating device, the pressure in the hydraulic chamber is always higher than the pressure in the insulation chamber or the preload insulation chamber during two or more hydraulic pressure generation cycles.

Therefore, it is possible to prevent gases such as combustion waste gas from entering the hydraulic chamber 6. Further, in the hydraulic pressure generating device of the present invention, since the combustion chamber 4 and the hydraulic pressure chamber 6 are isolated by the heat insulation chamber or the preload insulation chamber 6, heat transfer of combustion heat to the hydraulic pressure chamber can be suppressed. It is therefore possible to prevent gas from entering or forming into the hydraulic medium.

Preferably, as shown in FIG. 2, the hydraulic pressure generating device of the present invention divides the inside of the cylinder 3 into three parts having different inner diameters in the middle by a pair of pistons 1.2 that reciprocate integrally, and the inner diameter of the cylinder 3 is divided into three parts in order from the end to the larger inner diameter side. The combustion chamber 4 burns fuel in two-stroke strokes, and the fuel mixture is sucked into the position where the inner diameter changes to prepressurize it.
It also consists of a preload insulation chamber 5 that blocks heat transfer from the combustion chamber 4, and a hydraulic pressure chamber 6 that makes liquid under high pressure on the small inner diameter side.The combustion chamber 4 has a spark plug 7 that ignites the fuel mixture and a piston lower limit. The preload insulation chamber is equipped with a scavenging hole 8 that opens at a position to introduce the fuel mixture from the preload insulation chamber 5, and an exhaust hole 9 that opens before the scavenge hole 8 when the piston descends and exhausts combustion waste gas. 5 is equipped with a fuel mixture introduction hole 10 for introducing the fuel mixture from the carburetor and a fuel mixture discharge hole 11 for pressure-feeding the fuel mixture to the combustion chamber 4. Due to the difference in cylinder inner diameter within the preload insulation chamber 5 of this device.

When the pistons 1 and 2 are rising, the volume increases, and when the pistons are falling, the volume decreases. Therefore, while the pistons are rising, the fuel mixture is passed through the fuel mixture introduction hole 10 to the preload insulation chamber 5.
While the piston is moving downward, the fuel mixture is compressed and pressurized, and the fuel mixture is injected into the combustion chamber 4 from the scavenging hole 8 that opens at the lower limit position of the piston via the fuel mixture discharge hole 11. Can be done. The device shown in FIG. 2 is an example of a two-stroke engine equipped with a scavenging hole 8 and an exhaust hole 9.

The intake valve and exhaust valve shown in Fig. 1 can be added to this, and gasoline, LPG, or LNG is used as fuel, but instead of the spark plug 7, a fuel injection nozzle is used to inject kerosene or the above-mentioned fuel. You can also. In the combustion chamber 4 of the apparatus shown in FIG. 2, the exhaust hole 9 opens when the piston 1 is at the lower limit as shown in the figure, and the scavenging hole 8 opens slightly later than this. When adding or adding an exhaust valve and an intake valve to the device shown in Figure 2.

The exhaust valve 8 is opened in synchronization with the opening and closing of the scavenging and exhaust holes, which automatically open and close depending on the position of the piston, to exhaust combustion waste gas, and the intake valve 8 is opened slightly later than this to exhaust the pressurized fuel. After scavenging with the mixture to expel combustion waste gas and filling the combustion chamber with the fuel mixture, the exhaust valve and intake valve are closed. Next, low-pressure liquid is injected from the hydraulic pressure source 18 into the hydraulic pressure chamber 6 through the check valve, pushing up the cylinder 2 and compressing the fuel air in the combustion chamber.The fuel is ignited by the spark plug 7 and combusted. The pressure inside the chamber 4 is high and the piston 1.
2 is pushed down integrally to make the liquid high pressure in the hydraulic pressure chamber,
At least one of the control valves 15 that pushes open the check valve 16 of the pressure liquid outflow pipe 14 is preferably a pressure control valve that opens and closes using internal pilot pressure. It is stored in the accumulator 17. Other control valves detect the passage of time from ignition, the pressure in the hydraulic chamber, or the positions of the pistons 1 and 2, and use this as a signal.

A sequence valve that opens and closes by controlling pilot pressure is good.
The pressure in the hydraulic chamber tends to decrease over time during the downward movement of the piston, so that the control valve that opens later will pass lower pressure liquid and store pressure medium in the accumulator.

The hydraulic pressure generating device of the present invention preferably has a plurality of cylinders facing each other as shown in FIGS. 3 and 4. In the example shown in FIG.
Each cylinder 3A, 3B is divided into three by a pair of pistons IA, 2A that reciprocate integrally, and combustion chambers 4A, 4B burn fuel sequentially from the end, and a preload insulation chamber blocks heat transfer from the combustion chamber. 5A, 5B, and a hydraulic chamber 6A that makes one body high pressure.

6B, and the piston rods 12 of such a pair of hydraulic pressure generators are connected on the hydraulic pressure chamber side.

The pistons on both sides reciprocate integrally. In this case, the fuel mixture in the combustion chamber is compressed by the combustion expansion force of the fuel Φ in the opposing combustion chamber. It can be used in the same way as described in the example. The device shown in Fig. 4 is an example of a four-stroke engine, and differs from the above explanation in that the combustion chambers of the four cylinders sequentially undergo four steps: suction, compression, combustion, and exhaust. For example, the fourth
In the figure, when the intake process is about to be completed in the combustion chamber 4A,
The compression process is about to be completed in the combustion chamber 4B, the combustion process is about to be completed in the combustion chamber 4C, and the exhaust process is about to be completed in the combustion chamber 4D.

The hydraulic pressure generating device of the present invention connects a liquid inflow pipe 13 with a non-return mechanism and a pressure liquid outflow pipe 14 with a non-return mechanism to a liquid pressure chamber 6, and the pressure liquid outflow pipe has a plurality of pressures operating at different pressures. and a control valve 15.

In the device of the present invention, it is desirable to connect an accumulator after each pressure control valve, and the liquid that has become high pressure in the hydraulic chamber is discharged through the check valve 16 of the pressure liquid outflow pipe 14.
It is preferable that at least one of the control valves 15 is a pressure control valve that is opened and closed by internal pilot pressure, and that the accumulator 1 is
Store in 7. Other control valves should be sequence valves that detect the passage of time from ignition or the pressure in the hydraulic chamber or the position of pistons 1 and 2 and use this as a signal to open and close by manipulating the pilot pressure.The pressure in the hydraulic chamber tends to decrease over time while the piston is descending.

Therefore, by configuring one or more of the control valves, which open later, to pass the low-pressure liquid and store the pressure medium in the accumulator, the pressure that gradually decreases as the piston descends is gradually reduced from high pressure to low pressure. extracts and stores multiple hydraulic media.

Energy conversion efficiency can be improved.

(Effects of the Invention) The problems of the prior art described above can be overcome by the hydraulic pressure generating device of the present invention. In other words, the hydraulic pressure generating device of the present invention has excellent energy conversion efficiency because it can directly convert combustion energy between internal combustion engines into hydraulic pressure, and by providing a heat insulating chamber, combustion waste gas is removed from the hydraulic medium. The hydraulic pressure chamber has multiple pressure control valves and the following accumulators, which prevent the hydraulic medium from heating up and vaporizing due to the transfer of combustion heat. The energy conversion efficiency can be further improved by connecting a hydraulic pressure generating device that prevents this from occurring. In addition, by making the inner diameter of the cylinder different in the middle, it is possible to prepress the fuel mixture.
It is also possible to facilitate the operation of the apparatus by arranging similar apparatuses of the present invention to face each other and connecting the piston rods so that they reciprocate integrally.

The reason for the low output efficiency of conventional engines is that the engine speed is extremely high (2000 to 8000 rpm), so the high temperature and high pressure energy cannot be fully utilized and is released into the atmosphere as waste gas, and the piston The energy loss in the process of converting reciprocating motion into rotary motion by the connecting rod and crankshaft was large.9 However, in the device of the present invention, the piston movement speed of the engine is slow enough to perform energy conversion, and the Energy conversion to hydraulic pressure is direct, and energy loss such as kinetic energy is small.

[Brief explanation of the drawing]

Figures 1 to 4 are conceptual diagrams of the device of the present invention, in which Figure 1 shows an example in which the cylinders have the same inner diameter, Figure 2 shows an example in which the cylinders have different inner diameters, and Figure 3 shows two cylinders facing each other. FIG. 4 shows an example in which the book cylinders are placed opposite each other. 1, IA, 1B, IC, ID: Piston. 2.2A, 2B, 2C, 2D: Piston. 3.3A, 3B, 3C, 3D Niji Linda. 4.4A, 4B, 4C, 4D: Combustion chamber. 5.5A, 58.5C, 50: insulation chamber, preload insulation chamber. 6.6A, 6B, 6C, 6D: Hydraulic pressure chamber. ? , 7A, 7B, VC, 70: Spark plug, fuel injection nozzle. 8.8A, 88.8C, 80: Intake valve, scavenging hole. 9.9A, 98.9C, 9D: Exhaust valve, exhaust hole. 10, IOA, IOB, IOC, 100: Fuel mixture introduction hole. 11, IIA, 11B, IIC, 110: Fuel mixture discharge hole. 12.12A, 12B, 12C, 120: Piston rod. 3, +3A, 13B, 13C, +30: Liquid flow pipe. 4.14A, 14B, +4C, 14D: Pressure liquid outflow piping. 5゜15A, 15B, +5C,! 5D: Pressure control valve, sequence valve. 6.16A, 16B, 16C,! 6D: Check valve. 7: Accumulator.

Claims (1)

[Claims] 1. A combustion chamber that divides the inside of the cylinder into three parts by a pair of pistons that reciprocate integrally and burns fuel sequentially from the end;
A hydraulic pressure generator characterized by comprising an insulating chamber that blocks heat transfer from a combustion chamber and a hydraulic chamber that pressurizes a liquid. 2. A pair of pistons that reciprocate integrally divides the inside of the cylinder into three parts with different inner diameters in the middle, and a combustion chamber that burns fuel every two strokes from the end to the large inner diameter side, and a combustion chamber that burns fuel at the position where the inner diameter changes. Consists of a preload insulation chamber that sucks in and prepressurizes the mixture and blocks heat transfer from the combustion chamber, and a hydraulic pressure chamber that pressurizes the liquid on the small inner diameter side, and ignites the fuel mixture in the combustion chamber. Equipped with a scavenging hole that opens at the lower limit position of the spark plug and piston and introduces the fuel mixture from the preload insulation chamber, and an exhaust hole that opens before the scavenge hole when the piston descends to exhaust combustion waste gas. A hydraulic pressure generating device characterized in that a chamber is equipped with a fuel mixture introduction hole for introducing a fuel mixture from a carburetor and a fuel mixture discharge hole for pressure-feeding a fuel mixture to a combustion chamber. 3. A combustion chamber that divides the inside of the cylinder into three parts by a pair of pistons that reciprocate in unison, and burns fuel sequentially from the end;
It consists of an insulating chamber that blocks heat transfer from the combustion chamber and a hydraulic chamber that pressurizes the liquid.The piston rods of such a hydraulic pressure generating device pair are connected on the hydraulic pressure chamber side, and the piston is integrated. A hydraulic pressure generating device characterized by reciprocating motion. 4. A liquid inflow pipe with a non-return mechanism and a pressure liquid outflow pipe with a non-return mechanism are connected to the liquid pressure chamber, and the pressure liquid outflow pipe includes a plurality of pressure control valves that operate at different pressures, and each pressure control valve. 4. The hydraulic pressure generating device according to claim 1, wherein an accumulator is connected after the hydraulic pressure generating device.