RU2597712C1 - Method of controlling a dose of injected fuel into combustion chamber of internal combustion engine using single-cycle drive of fuel injector - Google Patents

Abstract

FIELD: engines.

SUBSTANCE: invention can be used in fuel feed systems of internal combustion engines (ICE). According to the invention, a control system sets setters 33 and 34 of injected fuel doses corresponding to position powerset, set on ICE, and slide valve 14 for controlling working medium flow in the position, which provides supplying the working medium from accumulator 6 into one of piston 17 cavities. Piston 17 starts motion, is connected with plunger 25, and together arrive to an extreme point of motion. As a result, fuel dose corresponding to the power set on the ICE is injected into the ICE combustion chamber. Then the control system transfer slide valve 14 to position where working medium from accumulator 6 is fed into an opposite chamber of piston 17. Piston 17 starts motion in opposite direction, is connected with plunger 21, and together arrive to an extreme point of motion, as a result, fuel is injected to into the ICE combustion chamber.

EFFECT: disclosed is a method of controlling a dose of fuel injected into ICE combustion chamber 2 using single-cycle drive of fuel injector with charging of accumulator 6 of drive with working medium energy of compressed air or fuel mix in ICE combustion chamber 2.

1 cl, 2 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 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 to the combustion chamber of an internal combustion engine (ICE), but does not allow controlling the dose of fuel supplied to the combustion chamber of the ICE. The purpose of the claimed invention is to provide control of the dose of fuel supplied to the combustion chamber of the engine, that is, to provide power control of the engine

SUMMARY OF THE INVENTION

The essence of the claimed invention is illustrated by the description of the principle of operation of a two-stroke drive of a fuel injector with charging a hydraulic accumulator or pneumatic accumulator of a drive, hereinafter referred to as a 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. 1), the piston of the internal combustion engine 1 compresses air or fuel mixture in the combustion chamber of the internal combustion engine 2 at the compression stroke, which presses on the left end surface of the piston of the pump 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 pump 4 through the check valve 5 enters the battery 6. Charging the battery 6 occurs when the engine is first started on the compression cycle. Further recharging of the battery 6 can 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 enter the undercut the piston of the pump 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 pump 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 combustion chamber Sun 2 becomes less than atmospheric, and the pump piston spring 11 returns the pump piston 4 to the left position and the working fluid through the check valve 12 is sucked into the cavity of the pump piston 4 from expansion tank 13.

To inject fuel into the combustion chamber of the internal combustion engine 2, the control system monitors the current position of the piston of the internal combustion engine 1 and, at the time when it is necessary to supply fuel to the combustion chamber of the internal combustion engine 2, sets the spool for controlling the flow of the working medium 14 to the left position. The working fluid from the accumulator 6 through pipelines 15, 16 enters the left cavity of the piston of the fuel injector drive 17. The spent working fluid from the right cavity of the piston of the fuel injector drive 17 through pipelines 18, 19 and the check valve 20 enters the compensation tank 13. Under the action of the incoming worker body piston of the fuel injector 17 moves to the right, connects to the right plunger of the fuel nozzle 21 and moves to the right with it. As a result, the fuel pressure in the right cavity of the plunger of the fuel injector 21 increases sharply. In this case, the kinetic energy of moving parts to a certain extent passes into the compression energy of the fuel and the energy of elastic deformation of the walls of the right cavity of the plunger of the fuel injector 21. Fuel is injected through the pipe 22 and through the check valve 23 into the combustion chamber of the ICE 2. The fuel is further dispersed, which increases quality of the fuel combustion process. At the same time, under the action of the spring 24, the left plunger of the fuel injector 25 moves to the right, and fuel from the fuel tank (not shown) is piped through the check valve 27 and through the pipe 28 into the left cavity of the plunger of the fuel nozzle 25. For the next fuel injection cycle the combustion chamber of the engine 2 control system sets the spool control flow of the working fluid 14 in the right, as shown in the figure, position. The working fluid from the battery 6 through pipelines 15, 18 enters the right cavity of the piston of the fuel injector drive 17. The piston of the fuel injector 17 moves to the left, connects to the left plunger of the fuel nozzle 25 and moves to the left with it. Fuel from the left cavity of the injector plunger 25 through the pipe 28 and through the check valve 29 is injected into the combustion engine ICE 2. The spent working fluid from the left cavity of the piston of the fuel injector drive 17 through pipelines 16, 30 and through the check valve 20 enters the compensation tank 13. At the same time under the action of the spring 31, the fuel from the fuel tank through the pipeline 26, through the check valve 32 and through the pipe 22 is sucked into the right cavity of the plunger of the fuel nozzle 21. For the next injection of fuel into the combustion chamber of the engine 2 The pressure acting in the already described fuel injector drive piston movement order.

Management of the dose of injected fuel into the combustion chamber of the engine 2 is as follows. To inject the maximum dose of fuel, the control system monitors the current position of the internal combustion engine piston 1 and, at the time when it is necessary to supply fuel to the combustion engine of the internal combustion engine 2, sets the flow control valve of the working fluid 14 to the left position and the right installer of the injected fuel dose 33 to the position as it shown on the picture. The working fluid from the accumulator 6 through pipelines 15, 16 enters the left cavity of the piston of the fuel injector 17, and the spent working fluid from its right cavity through pipelines 18, 19 and the check valve 20 into the compensation tank 13. Under the action of the drive piston entering the cavity the fuel injector 17 of the working fluid, the piston of the fuel injector 17 moves to the right, is connected to the right plunger of the fuel nozzle 21 and moves to the right with it. Since the right plunger of the fuel injector 21 in the initial position was in the left extreme position, it makes a full stroke from left to right, that is, the maximum possible dose of fuel corresponding to the maximum power of the internal combustion engine is injected into the combustion chamber of ICE 2. For the injection of the minimum, corresponding minimum engine ICE power, dose of fuel, the control system sets the right installer of the dose of injected fuel 33 (see a fragment of the diagram of Fig. 2) to the extreme right position, and the left installer of the dose of injected fuel 34 to the leftmost extreme position. Now, the right plunger of the fuel injector 21 and the left plunger of the fuel nozzle 25 make the minimum stroke corresponding to the minimum power of the internal combustion engine, during which the minimum possible dose of fuel is supplied to the combustion chamber of the internal combustion engine 2. The task of the ICE intermediate powers is achieved by setting the positions of the installers of the injected fuel dose corresponding to them. In this way, the goal of the claimed invention is achieved - controlling the dose of fuel supplied to the combustion chamber.

SUMMARY OF THE INVENTION

A method for controlling the dose of injected fuel into 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 with the energy of compressed air or a fuel mixture in the combustion chamber of an internal combustion engine, including a control system, two fuel dose adjusters, a working fluid flow control valve, a pneumatic accumulator the drive, the piston of the fuel injector drive and two plungers of the fuel nozzle, characterized in that the control system sets installers of injected fuel doses to a position corresponding to the power set on the internal combustion engine and a control valve for controlling the flow of the working fluid to a position in which the working fluid from the pneumatic accumulator of the drive enters one of the piston cavities of the single-stroke drive of the fuel injector, the piston of the single-stroke drive of the fuel injector begins to move, connects to one of the two plungers of the fuel injector and with it arrives at the extreme point of movement, as a result, internally in the combustion chamber of the engine about a fuel dose corresponding to the power set on the internal combustion engine is injected, after the piston of the single-stroke drive of the fuel nozzle and the piston of the fuel nozzle arrive at the extreme point of movement, the control system moves the control valve of the working fluid flow to the position in which the working fluid from the pneumatic accumulator of the drive enters the opposite cavity piston single-stroke drive fuel injector, piston single-stroke drive fuel injector begins to move in the opposite direction, is connected to the other of the two plungers of the fuel injector, and with it arrives at the outermost point of the movement, resulting in another injection into the combustion chamber of the internal combustion engine given by the respective internal combustion engine fuel power dose.

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 1. Schematic diagram of a two-stroke drive of a fuel injector with charging a hydraulic accumulator or a pneumatic accumulator of an energy drive of compressible air or fuel mixture in an internal combustion engine combustion chamber.

1 - combustion chamber of the internal combustion engine; 2 - internal combustion engine piston; 3 - the piston of the pump drive; 4 - pump piston; 5, 12; 20, 23, 27, 29, 32 - check valve; 6 - pneumatic accumulator; 7 - stopper piston; 8, 15, 16, 18, 19, 22, 26, 28, 30 - pipeline; 9 - stopper; 10 - spring of a stopper; 11 - spring of the piston of the pump; 13 - compensation tank; 14 - spool control the flow of the working fluid; 17 - a piston of a fuel injector drive; 21 - the right plunger of the fuel injector; 24, 31 - spring; 25 - the left plunger of the fuel injector.

Figure 2. A fragment of a schematic diagram of a two-stroke drive of a fuel injector with charging a hydraulic accumulator or a pneumatic accumulator of an energy drive of compressed air or a fuel mixture in an internal combustion engine combustion chamber.

21 - the right plunger of the fuel injector; 25 - the left plunger of the fuel injector; 33 - the right installer of the dose of injected fuel; 34 - left installer dose of injected fuel;

Claims (1)

A method for controlling the dose of injected fuel into 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 with the energy of compressed air or a fuel mixture in the combustion chamber of an internal combustion engine including a control system, two fuel dose adjusters, a working fluid flow control valve, a battery the drive, the piston of the fuel injector drive and two plungers of the fuel nozzle, characterized in that the control system installs the injectors of doses of injected fuel in the position corresponding to the power set by the internal combustion engine and the control valve for controlling the flow of the working fluid to the position where the working fluid from the drive accumulator enters one of the piston cavities of the single-stroke drive of the fuel injector, the piston of the single-stroke drive of the fuel injector starts moving, connects to one of the two plungers of the fuel injector and with it arrives at the extreme point of movement, as a result, into the combustion chamber of the internal combustion engine a dose of fuel corresponding to the power set to the internal combustion engine is searched, after the arrival of the piston of the single-stroke drive of the fuel nozzle and the plunger of the fuel nozzle at the extreme point of movement, the control system transfers the control valve of the flow of the working fluid to the position in which the working fluid from the drive accumulator enters the opposite cavity of the single-stroke piston the fuel injector drive, the piston of the single-stroke fuel injector drive begins to move in the opposite direction, warns with the other of the two plungers of the fuel nozzle and with it arrives at the extreme point of movement.

Images