JPH03172573A - Device for fuel injection into operating combustion chamber with compression pressure - Google Patents

Abstract

PURPOSE:To achieve high output, low fuel consumption, low pollution or the like by installing a plunger being operated by dint of combustion chamber pressure after being interconnected to this combustion chamber, and making fuel so as to be injected direct into the combustion chamber in operation at the vicinity of a top dead center of a piston. CONSTITUTION:A planger body 5 is installed on a cylinder head part after being inter-connected to a combustion chamber of an engine, and a plunger 3 is slidably fitted to a cylinder 6 in the cylinder head part. Fuel is made suppliable into this cylinder 6 by way of a fuel valve 12, and when pressure in the combustion chamber 2 goes up in a compression stroke, gas in the combustion chamber is fed to the inside of the cylinder 6 through a clearance 7 in and around the plunger 3 under pressure, and when a piston 2 reaches the vicinity of a top dead center of the compression stroke, pressure in a hydraulic chamber 8 is discharged by way of a rotary valve (unillustrated herein) whereby the plunger 3 is slidden in the B direction, through which combustion in the cylinder 6 is made so as to be injected to the inside of the combustion chamber 2 through the clearance 7.

Description

[Detailed Description of the Invention] The present invention operates the plunger near top dead center using compression pressure, etc. The timing of operation is controlled by arbitrarily releasing the hydraulic pressure.
A device that injects fuel gas, etc. in the cylinder of the plunger into the combustion chamber and cylinder.When the pressure in the main combustion chamber changes from negative pressure to compression pressure, or when the main piston enters the suction stroke, fuel is injected into the plunger cylinder through a check valve. When the pressure in the combustion chamber increases, the gas in the combustion chamber is pumped into the plunger cylinder through the fuel injection clearance of the plunger, and by operating an arbitrary plunger near top dead center, the fuel gasified in the plunger cylinder is transferred to the fuel chamber. , a device that injects into the main cylinder. Previously, this type of fuel injection device was invented, but it was designed to inject only fuel, and the plunger required a high-pressure needle valve to prevent backflow of fuel and to make the injected fuel fine, so the plunger was used more than necessary. The power loss required for fuel injection with a large, high-pressure needle valve requires a fuel pressure hole and fuel supply groove leading to the needle valve combustion chamber. This has the disadvantage that residual fuel is generated, which lowers the fuel chamber pressure and causes fuel to drip.

However, in the present invention, by sending fuel to the cylinder of the plunger through a valve, the pressure generated in the combustion chamber is transferred to the cylinder of the plunger. The combustion chamber and plunger cylinder are communicated by creating a small clearance between the inner diameter and the plunger cylinder. Together with or after fuel is supplied to the plunger cylinder, the compressed gas from the combustion chamber is pumped and gasified into the combustion chamber from near the top dead center to increase the volume. While injecting the increased amount of fuel, a rapid flow is given to the flame after combustion has started, and by giving a flow to the flame after combustion has started, it increases the strength of the flame and promotes combustion.When supplying fuel, use a plunger. Enables supply by negative pressure generated in the cylinder, and after fuel is supplied, the plunger reaches the cylinder.The volume plunger moves in direction B.The volume after fuel gas injection is small, and there is no after-droplet of gasified fuel, resulting in a strong pressure needle. By instantly injecting fuel without creating high pressure due to valve failure, and by increasing the volume of fuel and injecting it, it instantly spreads throughout the combustion chamber and achieves effective combustion.

Embodiments will be explained in detail below based on the drawings. Figures 1 to 5 show the first implementation, Figure 1 is a sectional view of a combustion wall with a removable fuel injection device, and Figure 2 is a piston. 3 is a sectional view of a hydraulic discharge section, FIG. 4 is a sectional view of a hydraulic pressure sending section, and FIG. 5 is a partial sectional view of an oil supply section. In the first embodiment shown in FIGS. 1 to 5, one piston, two combustion chambers. 3 plungers, 4 pressure receiving parts,
5 plunger body, 6 plunger chamber, 9 plunger protrusion prevention part, 10 oil seal, 11 washer, 12 fuel valve, 13 spring, 14 spring receiver valve, 15 fuel supply hole, 16 hydraulic hole, 17 hydraulic discharge hole, 18 hydraulic Chamber cover, 19 Tightening met, 20 Attachment/removal screw part, 21 Fuel supply holder attachment screw part, 22 Per fuel valve, 23 Valve seat, 1A rotating part, 2A rotating valve outer shell, 3A cap, 4A oil in Figure 2 Supply hole, 5A oil supply groove, 6A
Oil drain hole, 7A hydraulic feed hole, 8A hydraulic feed groove, 9A oil drain hole, 10A hydraulic drain groove, 12A oil leakage drain groove, 13A16A
The operation of the power transmission shaft, 17A rotating part bearing, and 18A oil drain hole embodiment will be explained.

When the plunger 3 moves in the direction A, arbitrary fuel is supplied into the plunger cylinder 6 via the fuel valve 12, and when the internal pressure of the combustion chamber 2 increases due to compression pressure, the gas in the combustion chamber is transferred into the plunger cylinder 6 from the clearance 7 provided in the plunger. When the piston 1 reaches near the top dead center of the compression stroke, the oil discharge groove 10A of the rotary valve 1A, which is driven in relation to the piston 1, reaches the oil discharge hole 9A provided in the outer shell 2A according to the number of cylinders, and the oil pressure chamber is discharged. The oil in the hydraulic chamber 8 can be discharged through a pipe (not shown) connecting the oil discharge hole 17 and the oil discharge hole 9A provided in the outer shell 2A, and the oil in the hydraulic chamber 8 is discharged by the combustion chamber 2 pressure received by the pressure receiving part 4 of the plunger 3. While moving in the direction of arrow B, the plunger cylinder and the internal fuel gas are injected into the combustion chamber 2 through the clearance of the plunger, and the oil to be sent under pressure from the hydraulic pump is sent from the oil supply groove 5A to the oil supply hole provided according to the number of cylinders. Pressure is sent to the hydraulic chamber 8 of the plunger provided in the combustion chamber where the piston 1 enters the suction stroke through a pipe (not shown) connecting the hydraulic pressure feeding hole 16 of the plunger 7A and the plunger 3, and the plunger 3 moves in the direction of arrow A, where the negative pressure in the combustion chamber is no longer restored. The above is repeated. If the plunger 3 is actuated in the A direction at the same time as the negative pressure generated in the combustion chamber, fuel can be supplied to the plunger cylinder 6 by the negative pressure generated in the plunger cylinder 6, although this will vary depending on the plunger cylinder structure. Fuel may be supplied when the fuel chamber negative pressure and the plunger cylinder negative pressure are simultaneously generated and the supplied fuel changes to compressed pressure without flowing out. By reducing the volume of the cylinder (6), fuel can be supplied at maximum output. FIG. 6 shows a second embodiment of the present invention, and parts having the same functions as those in the first embodiment will be described with the same reference numerals.

The difference between the second embodiment and the first embodiment is that when the pressure receiving part 4 of the plunger 3 moves in the direction B due to compression pressure etc. near the top dead center, the protruding part 24 in the hydraulic chamber 8 of the pressure receiving part 4 covers the hydraulic chamber. 1
8, and acts as a hydraulic damper.In addition to the hydraulic damper, a spring or the like may also be used.As described above, the present invention is applicable to spark ignition internal combustion engines and rotary internal combustion engines. Including compressive heat ignition, which suppresses the fuel temperature rise before the start of combustion to prevent knocking, and which applies fast air to the flame after combustion has started (for example, even if you apply fast air to a bonfire in the early stages of combustion, the flame will not be as strong. (It doesn't increase the flame, but it increases the flame intensity.) This not only supplies oxygen but also gives the flame a flow, so even if a swirl is applied during the intake stage, the combustion of lean fuel will not increase. Although it is possible, the combustion speed is slow and the combustion temperature is low. Even if NOx is suppressed, it will cause contradictory pollution, and in conventional internal combustion engines, combustion will not occur unless a rich mixture ratio fuel is supplied, and NOx will increase if semi-high temperature combustion occurs. Naturally, the present invention obtained a different result from this.The dense gas is injected and combusted at the same time, and the surrounding gas is given a fast flow due to the fire.The high temperature gas and fuel are mixed, and the high temperature gas creates a fast flow to promote combustion. It burns at high temperatures, making it possible to achieve high output, low fuel consumption, and low pollution.

[Brief explanation of the drawing]

Figures 1 to 5 show embodiments of the present invention, and Figure 1 is a sectional view of a combustion chamber with a removable fuel injection device. Figure 2 is a rough sectional view of a hydraulic valve that is driven in relation to the stroke of a piston. , FIG. 3 is a sectional view of the oil discharge section, FIG. 4 is a sectional view of the hydraulic feed section, and FIG. 5 is a sectional view of the oil supply section. Explanation of main symbols 3 Plunger 4 Pressure receiver 6 Plunger cylinder 7 Fuel injection clearance 8 Hydraulic chamber 12 Fuel valve 4A Oil supply hole 5A
Oil supply groove 7A Hydraulic feed hole 8A Hydraulic feed groove 9A Oil discharge hole 10A
Oil drain groove 16A Power transmission shaft 17A Rotating part bearing.

Claims (1)

[Claims] 1. A device for operating a plunger near top dead center using combustion chamber pressure or the like to inject into a combustion chamber, etc. 2. The plunger has a removable structure and is installed on a wall of the combustion chamber. Injecting device described in the scope section