RU2642006C1 - Control method of fuel dose by pneumatic drive of fuel casing of free fuel energy module with general external combustion chamber - Google Patents

Abstract

FIELD: fuel combustion devices.

SUBSTANCE: control method for fuel dose by pneumatic drive of fuel injector of free piston power module with common external combustion chamber (ECC) is proposed. Compressed air for driving fuel injector is taken from compressed air supply line to ECC 1, enters air accumulator 31 and charges it. In order to set supply of required fuel dose to ECC 1, control system installs fuel dose installer 32 at corresponding set fuel dose. To supply fuel to ECC 1, control system switches the compressed air supply control valve 33 to position where compressed air from accumulator 31 enters one of cavities of fuel injector drive piston 36. Under air pressure effect, piston 36 moves towards ECC 1, is connected to plunger 37 of fuel injector and, together with it, moves to stop 38 as far as it will go. Fuel from plunger cavity 37 is fed to ECC 1. In order to prepare fuel injector for the next fuel supply cycle, control system switches compressed air supply control valve 33 to position where compressed air from pneumatic accumulator 31 enters other cavity of fuel injector drive piston 36. Piston 36 moves in the opposite direction from the ECC. Plunger 37 of fuel injector, under the action of plunger spring 43, also moves in the opposite direction from ECC. At the same time, fuel from fuel tank is absorbed through check valve 44 into cavity of fuel injector plunger.

EFFECT: control method for fuel dose by pneumatic drive of fuel injector of free piston power module with common external combustion chamber (ECC) is proposed.

1 cl, 3 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the field of power engineering.

BACKGROUND

The closest prototype of the claimed invention is patent No. 2422667 "Gas-controlled fuel nozzle of an internal combustion engine."

OBJECT OF THE INVENTION

The prototype of the claimed invention provides fuel in the combustion chamber of an internal combustion engine. The purpose of the claimed invention is to provide control of the dose of fuel into the external combustion chamber of the energy module with a common external combustion chamber by a pneumatic drive of the fuel injector.

SUMMARY OF THE INVENTION

The essence of the claimed invention is illustrated on the basis of RF patent 2422655 "Two-cylinder free-piston power module with a common external combustion chamber and a linear electric generator with opposed movement of the pistons", which operates as follows. The combustion products (Fig. 1) from the common external combustion chamber 1 (hereinafter referred to as the external combustion chamber 1) through the channel 2 through the gas distribution valve 3 enter the right (in the figure) piston cavity 4 of the left expansion machine 5, and the gas distribution valve through the channel 6 7 into the left cavity of the piston 8 of the right expansion machine 9. Under the action of expanding combustion products, the pistons 4 and 8 and the anchors of the linear generator 10 and 11 connected to them begin to diverge. The anchors 10 and 11 can be permanent magnets, or electromagnets magnetized by a magnetizing coil 12 when a magnetizing current flows through its turns. In both cases, the magnetic flux closes along the contour: anchor 11, stator magnet 13, anchor 10. When the anchors 10 and 11 diverge, the magnetic lines of their magnetic fields intersect, as a result of which the magnetic flux changes in the stator magnet 13 and the anchors 10 and 11 and, as as a result, an electric pulse is generated in the stator coil 14. When the pistons and anchors reach the points of extreme divergence, the control system puts the valves 3, 7, 15, 16 in opposite positions. Now, the combustion products from the external combustion chamber 1 through the channel 2 and through the gas distribution valve 15 enter the left cavity of the piston 17, and through the channel 6 and through the gas distribution valve 16 into the right cavity of the piston 18. The pistons and the anchors of the electric generators connected to them begin to converge. An opposite sign pulse is generated in the stator coil 14. Exhaust combustion products when the pistons 17, 18 diverge, are released into the atmosphere through the gas distribution valves 15 and 16, and when converging through the gas distribution valves 3 and 7. At the same time, from the corresponding piston cavities 4, 8, 17, 18 through the check valves 19, 20, 21, 22 through pipelines 23, 24, air is supplied to the external combustion chamber 1 to ensure the fuel combustion process, and air is drawn in from the atmosphere through the check valves 25, 26, 27, 28.

A method for controlling a dose of fuel by a pneumatic drive of a fuel injector of a free-piston power module with a common external combustion chamber is as follows. Compressed air to drive the fuel injector is taken from the compressed air supply line (channels 23, 24) to the external combustion chamber 1, and through channel 29 (figure 2) through the check valve 30 enters the pneumatic accumulator 31, and charges it.

To set the minimum fuel dose to the external combustion chamber (not shown in FIG. 2), the control system sets the fuel dose installer 32 to the minimum fuel dose position, as shown in the figure. To supply the minimum dose of fuel to the external combustion chamber, the control system moves the control valve of compressed air supply 33 to the upper position. Compressed air from the pneumatic accumulator 31 through channels 34, 35 enters the upper cavity of the piston of the fuel injector 36. Under the action of the compressed air entering this cavity, the piston of the fuel injector 36 moves downward, connects to the plunger of the fuel injector 37 and together with it moves down to the stop to the stroke limiter of the plunger of the fuel nozzle 38. Fuel from the lower cavity of the plunger of the fuel nozzle 37 is supplied through an non-return valve 39 to the external combustion chamber. The exhaust air from the lower cavity of the piston of the fuel injector 36 is discharged through the channels 40, 41 into the atmosphere. To prepare the fuel injector for the next fuel supply cycle, the control system moves the compressed air control spool 33 to the upper position. Compressed air from the pneumatic accumulator 31 through channels 34, 40 enters the lower cavity of the piston of the fuel injector 36. Under the action of the compressed air entering this cavity, the piston of the fuel injector 36 moves up. The exhaust air from the upper cavity of the plunger of the fuel injector 36 is discharged into the atmosphere through channels 35, 42. When the plunger of the fuel nozzle 37 moves up, the spring of the plunger of the fuel nozzle 43 also moves the plunger nozzle up. Fuel from the fuel tank (not shown in the figure) through the check valve 44 is sucked into the lower cavity of the plunger of the fuel nozzle 37. The fuel nozzle is ready for the next fuel supply cycle. To set the maximum dose of fuel, the control system sets the installer of the dose of fuel 32 (figure 3) in the lower position. Subsequently, to supply the maximum dose of fuel to the external combustion chamber, the control system acts in the same way as when supplying the minimum dose of fuel. To set intermediate doses of fuel in an external combustion chamber, the control system sets the installer of the dose of fuel 32 (figures 2 and 3) in the position corresponding to the set dose of fuel.

SUMMARY OF THE INVENTION

A method of controlling a dose of fuel by a pneumatic drive of a fuel injector of a free piston energy module with a common external combustion chamber including a fuel nozzle, a compressed air supply line to an external combustion chamber, an external combustion chamber, an air accumulator, a control system, a fuel dose adjuster, a compressed air control spool, a drive piston fuel injector, fuel injector plunger, fuel injector plunger travel stop emphasis, fuel injector plunger spring and fuel tank to. Compressed air to drive the fuel injector is taken from the compressed air supply line to the external combustion chamber, enters the pneumatic accumulator and charges it; to set the minimum fuel dose to the external combustion chamber, the control system sets the fuel dose installer to the minimum fuel dose supply, to supply the minimum doses of fuel to the external combustion chamber, the control system moves the control valve for the supply of compressed air to a position in which compressed air from the pneumatic accumulator enters the cavity of the piston of the fuel injector drive, when compressed air enters the piston of the fuel nozzle drive moves towards the external combustion chamber, connects to the fuel injector plunger and moves with it to the stop in the stop of the fuel injector plunger, fuel from the cavity of the fuel injector plunger the nozzle is fed into the external combustion chamber, to prepare the fuel nozzle for the next fuel supply cycle, the control system transfers the control valve for compressed air supply to the condition in which compressed air from the pneumatic accumulator enters the cavity of the fuel injector drive piston, when compressed air enters the fuel injector drive piston moves in the opposite direction from the external combustion chamber, the fuel nozzle plunger also moves in the opposite direction under the action of the spring of the fuel injector plunger from the external combustion chamber, the fuel from the fuel tank is sucked through to the cavity of the plunger of the fuel nozzle and the fuel nozzle is ready for the next supply cycle fuel, to set the maximum dose of fuel to the external combustion chamber, the control system sets the fuel dose installer to the position of maximum fuel dose; in order to supply the maximum dose of fuel to the external combustion chamber, the control system operates in the same way as when supplying the minimum fuel dose, the supply of intermediate doses of fuel to the external combustion chamber, the control system sets the installer of the fuel dose in the position corresponding to the specified dose of fuel.

DETAILED DESCRIPTION OF THE INVENTION

The R&D costs of a fuel dose control system for a pneumatic drive of a free-piston power injector with a common external combustion chamber cannot differ significantly from those when designing a classic ICE.

GRAPHIC MATERIAL

Figure 1. Schematic diagram of a two-cylinder single-stroke free-piston power module with a common external combustion chamber and a linear electric generator with opposed movement of the anchors.

1 - combustion chamber; 2, 6, 23, 24 - channel; 3, 7, 15, 16 - gas distribution valve; 4, 8, 17, 18 - the piston; 5, 9 - expansion machine; 10, 11 - anchor; 12 - magnetization coil of the armature; 13-stator magnet; 14 - stator coil; 19, 20, 21, 22, 25, 26, 27, 28 - check valve.

Figure 2. Schematic diagram of a pneumatic drive of a fuel injector of a free-piston power module with a common external combustion chamber at the position of the minimum dose of fuel supplied to the external combustion chamber.

29, 34, 35, 40, 41, 42 - channel; 30, 39, 44 - check valve; 31 - pneumatic accumulator; 32 - the installer of the dose of fuel; 33 - spool control the supply of compressed air; 36 - piston of the fuel injector drive; 37 - a plunger of a fuel atomizer; 38 - stroke limiter of the plunger of the fuel injector; 43 - spring of the plunger of the fuel injector.

Figure 3. Schematic diagram of a pneumatic drive of a fuel injector of a free-piston power module with a common external combustion chamber at the position of the maximum dose of fuel supplied to the external combustion chamber.

32 - the installer of the dose of fuel; 36 - piston of the fuel injector drive; 37 - a plunger of a fuel atomizer; 38 - stroke limiter of the plunger of the fuel injector; 39 - check valve; 43 - spring of the plunger of the fuel injector.

Claims (1)

A method of controlling a dose of fuel by a pneumatic drive of a fuel injector of a free piston energy module with a common external combustion chamber including a fuel nozzle, a compressed air supply line to an external combustion chamber, an external combustion chamber, an air accumulator, a control system, a fuel dose adjuster, a compressed air control spool, a drive piston fuel injector, fuel injector plunger, fuel injector plunger travel stop emphasis, fuel injector plunger spring and fuel tank k, characterized in that the compressed air for driving the fuel injector is taken from the compressed air supply line to the external combustion chamber, enters the pneumatic accumulator and charges it; to set the minimum dose of fuel to the external combustion chamber, the control system sets the fuel dose installer to the minimum supply position doses of fuel, in order to supply the minimum dose of fuel to the external combustion chamber, the control system transfers the control valve of compressed air supply to the position at which the compressed air x from the pneumatic accumulator enters the cavity of the piston of the fuel injector drive, when compressed air enters into which the piston of the fuel nozzle drive moves towards the external combustion chamber, connects to the fuel injector plunger and together with it moves to the stop of the fuel injector plunger stop, the fuel from the cavity of the plunger of the fuel nozzle is fed into the external combustion chamber, to prepare the fuel nozzle for the next fuel supply cycle, the control system transfers the feed control spool compressed air to the position in which compressed air from the pneumatic accumulator enters the cavity of the piston of the fuel injector drive, when compressed air enters the piston of the fuel injector drive moves in the opposite direction from the external combustion chamber, the fuel injector plunger also moves under the action of the spring of the fuel injector plunger in the opposite direction from the external combustion chamber, the fuel from the fuel tank through the check valve is sucked into the cavity of the plunger of the fuel injector and fuel the nozzle is ready for the next fuel supply cycle; to set the maximum fuel dose to the external combustion chamber, the control system sets the fuel dose installer to the maximum fuel dose supply; in the future, the control system acts in the same way as to supply the maximum fuel dose to the external combustion chamber when applying the minimum dose of fuel, to supply intermediate doses of fuel to the external combustion chamber, the control system sets the installer of the dose of fuel in the appropriate set dose opliva position.

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