RU2591360C1 - Method of controlling fuel feed into combustion chamber of internal combustion engine using single-cycle drive of fuel injector - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention can be used in fuel feed systems of internal combustion engines (ICE). Disclosed is a method of controlling fuel feed into ICE combustion chamber using a single-cycle drive of fuel injector with charging of accumulator 6 of drive with working medium energy of compressed air or fuel mix in combustion chamber 2 of ICE. To inject fuel into combustion chamber 2 of ICE control system traces current position of piston 1 of ICE and at a moment when it is required to feed fuel into combustion chamber 2, alternately sets slide valve 14 for working medium flow control, as a result of which working medium from accumulator 6 also alternately flows into one or another piston 17 of drive of fuel injector and fuel from cavities of plungers 21, 24 of fuel injector is successively injected into combustion chamber 2 of ICE.

EFFECT: simplified drive of fuel injector.

1 cl, 1 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to engine building, in particular to fuel equipment of internal combustion engines.

BACKGROUND

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

Abstract to patent No. 2422667: “The invention relates to engine building, in particular to a fuel equipment of internal combustion engines. The invention allows to simplify the kinematic scheme and use the nozzle in all types of internal combustion engines. The pneumatically controlled fuel nozzle of an internal combustion engine comprises a control system for a pneumatically controlled fuel nozzle that monitors the current position of the piston of an internal combustion engine, a gas distributor, a piston for driving a fuel nozzle, and a check valve. The air-driven fuel nozzle is equipped with a pneumatic accumulator, a fuel nozzle plunger and a shut-off valve, which serves to stop the supply of the working fluid from the combustion chamber of the internal combustion engine to the pneumatic accumulator after it is fully charged. The pneumatic accumulator has the ability to communicate through channels with the power and return cavities of the piston of the nozzle drive and through a check valve with the combustion chamber of the internal combustion engine. The pneumatic accumulator is charged with a working fluid from the cylinder of the internal combustion engine during a compression stroke. To inject fuel with a pneumatic fuel injector plunger into the cylinder of an internal combustion engine, the pneumatic fuel injector control system sets the gas distributor to a position that ensures that the working fluid flows from the pneumatic accumulator into the power cavity of the fuel injector drive piston. To prepare the pneumatically controlled fuel nozzle in readiness for the next working cycle, the control system of the pneumatic controlled fuel nozzle sets the gas distributor to a position that ensures the working fluid flows from the pneumatic accumulator into the return cavity of the piston of the fuel nozzle drive. "

OBJECT OF THE INVENTION

The prototype of the claimed invention provides fuel supply to the combustion chamber of an internal combustion engine (ICE), but at the same time, fuel is supplied in two strokes of the piston of the fuel injector drive — the fuel injection cycle and the preparation cycle of the drive for the next injection cycle. The purpose of the claimed invention is to provide fuel to the combustion chamber for each stroke of the piston of the fuel injector drive, which will simplify the drive and reduce its specific gravity.

SUMMARY OF THE INVENTION

The essence of the claimed invention is illustrated by the description of the principle of operation of the fuel injector drive with charging the hydraulic accumulator or pneumatic accumulator of the drive, hereinafter - the battery, with a working fluid (liquid or gas), the energy of compressed air or the fuel mixture in the combustion chamber of the engine. When starting the internal combustion engine (see Fig.), The piston of the internal combustion engine 1 compresses air or the fuel mixture in the combustion chamber of the internal combustion engine 2 at the compression stroke, which presses on the left surface of the piston of the compressor drive 3, as a result of which it moves to the right (according to the figure). The working fluid from the right cavity of the piston of the compressor 4 through the check valve 5 enters the battery 6. Charging the battery 6 occurs during the first start of the internal combustion engine in one compression cycle. Further recharging of the battery 6 may occur on the working cycle of the internal combustion engine. After the pressure of the working fluid in the accumulator 6 reaches a value that ensures the functioning of the fuel injector drive, the working fluid from the accumulator 6 enters the lower cavity of the piston of the stopper 7 through the pipe 8. The piston of the stopper 7 and the stopper 9 connected to it occupy the upper position and enters recess of the piston of the compressor 4, blocking its movement. The receipt of the working fluid in the battery 6 is stopped. When the pressure of the working fluid in the battery 6 is less than the required value for actuating the fuel injector drive, the spring of the stopper 10 overcomes the pressure of the working fluid in the lower cavity of the piston of the stopper 7 and returns it to the lower position, thereby providing the possibility of further recharging of the battery 6. During the next cycle recharging the battery 6, the piston of the compressor 4 moves to the right, and the working fluid in its cavity through the check valve 5 enters the battery 6. Then, at the suction stroke, the pressure in the chamber is burned out engine ICE 2 becomes less than atmospheric and the spring of the compressor piston 11 returns the compressor piston 4 to the left position and the working fluid through the check valve 12 from the compensation barrel 13 is sucked into the compressor piston cavity 4. To inject fuel into the combustion chamber 2, the control system monitors the current position of the ICE piston 1 and at the time when it is necessary to supply fuel to the combustion chamber of the engine 2, sets the spool for controlling the flow of the working fluid 14 to the position as shown in the figure. The working fluid from the accumulator 6 through pipelines 15, 16 enters the right cavity of the piston of the fuel injector drive 17. The spent working fluid from its left cavity through pipelines 18, 19 and the check valve 20 enters the compensation tank 13. Under the action of the incoming working fluid, the fuel drive piston nozzle 17 moves to the left. Fuel from the cavity of the left plunger of the fuel injector 21 is injected through the check valve 22 into the combustion chamber 2. At the same time, fuel from the fuel tank (not shown in the figure) is sucked into the cavity of the right plunger of the fuel nozzle 24. To inject another dose of fuel into the combustion chamber 2, the control system moves the spool of flow control of the working fluid 14 to the left position. The working fluid from the battery 6 through pipelines 15, 18 enters the left cavity of the piston of the fuel injector drive 17. The spent working fluid from its right cavity through pipelines 16, 25 and the check valve 20 enters the compensation tank 13. Under the action of the incoming working fluid, the fuel drive piston nozzle 17 moves to the right. Fuel from the cavity of the right plunger of the fuel injector 24 is injected through the check valve 26 into the combustion chamber 2. At the same time, fuel from the fuel tank through the check valve 27 is sucked into the cavity of the right plunger of the fuel nozzle 24.

SUMMARY OF THE INVENTION

A method for controlling the supply of fuel to the combustion chamber of an internal combustion engine with a single-stroke drive of a fuel injector with charging the drive battery with a working fluid by the energy of compressed air or the fuel mixture in the combustion chamber of an internal combustion engine, including a control system, a flow control valve for the working fluid, a battery, a fuel injector drive piston, and two plungers of the fuel injector, characterized in that for the injection of fuel into the combustion chamber of the internal combustion engine, the control system monitors the current position of its piston and at the time when it is necessary to supply fuel to the combustion chamber, it alternately sets the spool for controlling the flow of the working fluid, as a result of which the working fluid from the accumulator also alternately enters one or the other cavity of the piston of the fuel injector, and the fuel from The cavity of the plunger of the fuel injector is sequentially injected into the combustion chamber of the internal combustion engine.

DETAILED DESCRIPTION OF THE INVENTION

Materials and technology for the implementation of the claimed invention do not go beyond the scope of modern capabilities.

GRAPHIC MATERIAL

Figure. Schematic diagram of the drive of a two-stroke fuel injector with charging the working fluid of the battery with the energy of compressible air or the fuel mixture in the combustion chamber of the internal combustion engine.

1 - combustion chamber of the internal combustion engine; 2 - internal combustion engine piston; 3 - the piston of the compressor drive; 4 - compressor piston; 5, 12, 20, 22, 23, 26, 27 — check valve; 6 - battery; 7 - stopper piston; 8, 15, 16, 18, 19, 25 - pipeline; 9 - stopper; 10 - spring of a stopper; 11 - compressor piston spring; 13 - compensation tank; 14 - spool control fluid flow; 17 - a piston of a fuel injector drive; 21 - the left plunger of the fuel injector; 24 - the right plunger of the fuel injector.

Claims (1)

A method for controlling the supply of fuel to the combustion chamber of an internal combustion engine with a single-stroke drive of a fuel injector with charging the drive battery with a working fluid by the energy of compressed air or the fuel mixture in the combustion chamber of an internal combustion engine, including a control system, a flow control valve for the working fluid, a battery, a fuel injector drive piston, and two plungers of the fuel injector, characterized in that for the injection of fuel into the combustion chamber of the internal combustion engine, the control system monitors the current position of its piston and at the time when it is necessary to supply fuel to the combustion chamber, it alternately sets the spool for controlling the flow of the working fluid, as a result of which the working fluid from the accumulator also alternately enters one or the other cavity of the piston of the fuel injector, and the fuel from The cavity of the plunger of the fuel injector is sequentially injected into the combustion chamber of the internal combustion engine.

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