RU2537323C1 - Control over ice exhaust gas recycling by timing valve fluid drive system - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: system comprises gas timing valve fluid control gear, fluid flow control slide, hydraulic accumulator, timing valve drive piston and timing valve. This gas timing valve fluid control gear defines fuel amount, exhaust gas amount and engine timing valve closure moment in compliance with preset current ICE output. At ICE offgas exhaust stroke at time moment defined by gas timing valve fluid control gear, said slide forces working fluid from hydraulic accumulator to under-piston of timing valve drive. Therefore, working fluid pressure makes timing valve gear drive piston force timing valve engaged therewith to closed position. This causes the portion of exhaust gases to stay in ICE cylinder. Note that at the next air of fuel mix suction stroke, exhaust gases are mixed therein with sucked air or fuel mix.

EFFECT: higher efficiency.

2 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the field of power engineering.

BACKGROUND

The closest analogue of the claimed invention is patent 2403409 "Kapan-cutoff of the pneumatic drive of the gas distribution mechanism of the internal combustion engine." It acts as follows.

The piston of the internal combustion engine 1 (Figure 1) during the compression stroke compresses the working fluid - air or fuel mixture - in the combustion chamber 2. At the same time, part of the working fluid from the combustion chamber 2 through pipeline 3, through the shutoff valve 4 and the check valve 5 enters air accumulator 6 and charges it. An internal combustion engine control system (not shown in the figure) monitors the current position of the internal combustion engine piston 1 and, at the time when it is necessary to open the gas control valve 7, sets the fluid flow control valve 8 to the position as shown in the figure. The working fluid from the pneumatic accumulator 6 through channels 9 and 10 enters the upper piston cavity of the valve actuator 11, as a result of which the gas distribution valve 7, if it is inlet, allows air from the atmosphere to enter combustion chamber 2 through the channel 12, or if it is exhaust, of combustion from the combustion chamber 2. To close the gas distribution valve 7, the control system sets the control valve of the fluid flow 8 to the lower position, and the working fluid from the pneumatic accumulator 6 through channels 9 and 13 enters the lower cavity through shnya actuator 11 the gas control valve 7, and is locked. In both cases, the spent working fluid is discharged through the channels 10, 13, 14, 15 into the atmosphere, and in a gasoline engine, where the working fluid is a fuel mixture, for reasons of fuel economy it is fed into the air intake of the engine. With a working cycle (combustion and expansion of the combustion products), the pressure in the combustion chamber of the internal combustion engine 2 can reach tens of atmospheres, and the temperature can reach hundreds or more degrees. But to ensure the operability of the pneumatic drive, the pressure of the working fluid is enough less. Limiting the pressure of the working fluid in the pneumatic accumulator 6 to the optimum value is ensured by the shut-off valve 4. If the pressure of the working fluid coming from the combustion chamber 2 is less than the optimum, it freely passes through the shut-off valve 4 into the pneumatic accumulator 6. When the pressure of the working fluid is above the optimum, the working fluid from the pneumatic accumulator 6 through the channel 16 enters the lower cavity of the piston of the shutoff valve 17. Under its influence, the piston of the shutoff valve 17 and the shut-off valve 18 connected to it move upward, and the channel 19 is closed, charging of the pneumatic accumulator 6 is stopped. The charge level of the pneumatic accumulator 6 by the working fluid is determined by the stiffness of the spring 20. The greater the stiffness of the spring, the higher the charge of the pneumatic accumulator 6.

The technical result of the invention is to increase engine efficiency by controlling exhaust gas recirculation in all internal combustion engine operation modes by a gas distribution valve hydraulic drive system.

SUMMARY OF THE INVENTION

The hydraulic drive system of the gas distribution valve in the internal combustion engine is as follows.

The figure 2 presents a diagram of a hydraulic drive system of a gas distribution valve. When starting the internal combustion engine, the piston of the internal combustion engine 1 compresses the working fluid — air or fuel mixture — in the combustion chamber of the internal combustion engine 2. during compression, the compressible working fluid presses on the left surface of the piston of the pump drive 3, as a result of which it moves to the right (according to the drawing). The working fluid located in the right cavity of the pump piston 4 (hereinafter referred to as the fluid) through the check valve 5 enters the hydraulic accumulator 6. The hydraulic accumulator 6 is charged with liquid during the first start of the internal combustion engine during one compression of the working fluid in the internal combustion engine combustion chamber 2. Further hydraulic accumulator 6 can be recharged. and on the working cycle of the internal combustion engine. When the fluid pressure in the accumulator 6 reaches a value that ensures optimal functioning of the gas distribution valve actuator 7, the liquid from the accumulator 6 enters the lower cavity of the piston of the stopper 8 through the pipeline 9. The piston of the stopper 8 and the stopper 10 connected to it occupy the upper position. The stopper 10 enters the undercut of the piston of the pump 4 and blocks the movement of the piston of the pump 4, the flow of fluid into the accumulator 6 is stopped. To open the gas control valve 7, the control system monitors the current position of the engine piston 1 and, at the time when it is necessary to open the gas control valve 7, sets the fluid flow control valve 11 to the position as shown in figure 2. The fluid from the hydraulic accumulator 6 through channels 12 and 13 enters the upper cavity of the piston of the gas distribution valve drive 14, connected by the rod 15 to the gas distribution valve 7. Under the action of the liquid, the gas distribution valve 7, if it is inlet, allows air from the atmosphere through the channel 16 to enter the combustion chamber 2, or, if it is exhaust, to flow the combustion products from the combustion chamber 2 into the atmosphere. The spent fluid from the lower cavity of the piston of the gas distribution valve 14 through the channels 17 and 18 enters the compensation tank 19. To close the gas distribution valve 7, the control system at the time when it is necessary to close the gas distribution valve 7, sets the fluid flow control valve 11 to the upper one, as shown on the figure, position. The fluid from the accumulator 6 through the channels 12 and 17 enters the lower cavity of the piston of the drive of the gas distribution valve 14, and the gas distribution valve 7 closes. The spent fluid from the upper cavity of the piston of the valve 14 through the channels 13 and 21 enters the compensation tank 19.

The compensation tank 19, in addition to receiving liquid when the actuator of the gas distribution valve 7 is activated, performs the function of a temperature damper. As soon as the temperature of the liquid in the accumulator 6 exceeds the optimum pressure as a result of heating, the safety valve 20 opens and the liquid from the accumulator 6 is discharged into the compensation tank 19. When the pressure of the liquid in the accumulator 6 decreases below the value that ensures the optimal functioning of the valve 7, the stop spring 21 moves the piston of the stopper 8 and stopper 10 to the lower position. At one of the subsequent strokes of the intake of air into the combustion chamber 2, the spring 22 transfers the piston of the pump 3 drive and the piston of the pump 4 to the original, left, position for recharging the pneumatic accumulator 6. In this case, the liquid from the compensation tank 19 through the check valve 23 is supplied to the right cavity of the pump piston 4. The pump is ready for the next recharge cycle of the accumulator 6. The recharge cycle of the accumulator 6 can occur both during the compression stroke of the air in the combustion chamber of the engine 2 and during the operating cycle ICE - combustion and expansion of combustion products in the engine cylinder.

The problems of preventing the removal of fluid by the rod 15, the piston of the pump drive 3 and the piston of the pump 4 can be solved in various ways. The diagram shows the bellows 24 and 25, eliminating the leakage of fluid from the hydraulic drive system.

Management of exhaust gas recirculation in an internal combustion engine by a hydraulic valve control system for all engine operation modes is as follows. The engine management system determines the mass of fuel and the mass of exhaust gases corresponding to the set current engine power to ensure optimal combustion of fuel. When the piston of the internal combustion engine 1 moves from the bottom dead center to the top dead center on the exhaust stroke of the exhaust expansion products from cylinder 2 in the vicinity of the top dead center, the control system closes the exhaust valve 7. A part of the exhaust gases remains in the cylinder and in the subsequent cycle of suction of the working fluid - air or fuel mixture - mixed with a working fluid. The timing of the closing of the gas control valve 8 is determined by the control system in such a way that, at a subsequent air intake stroke, there is a mass of exhaust gases in the cylinder that ensures the optimal process of fuel combustion at a given engine operation mode.

SUMMARY OF THE INVENTION

A method for controlling exhaust gas recirculation in an internal combustion engine with a gas distribution hydraulic drive system including a gas distribution hydraulic drive control system, a fluid flow control valve, a hydraulic accumulator, a gas distribution valve piston and a gas distribution valve, characterized in that the gas distribution hydraulic drive control system determines the mass fuel mass of exhaust gases and time instant closing the gas distribution valve of the internal combustion engine in accordance with the set current capacity of the internal combustion engine, and at the time of exhaust exhaust from the cylinder of the internal combustion engine to a point in time determined by the hydraulic drive control system of the gas distribution valve, the fluid flow control valve supplies the working fluid from the hydraulic accumulator to the volume under gas valve drive piston, therefore piston working fluid pressure The gas valve actuator moves the gas valve connected to it to the closed position, as a result of which some of the exhaust gases remain in the cylinder of the internal combustion engine, and in the subsequent cycle of air or fuel mixture intake into the cylinder of the internal combustion engine, the exhaust gases are mixed in the cylinder of the internal combustion engine with intake air or fuel mixture.

TECHNICAL APPLICABILITY 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.

Scheme of the pneumatic drive of the gas distribution mechanism of an internal combustion engine with a trap-shutoff.

1 - piston of an internal combustion engine; 2 - a combustion chamber; 3, 9, 10, 12, 13, 14, 15, 16, 19 - pipelines and channels; 4 - shutoff valve; 5 - check valve; 6 - pneumatic accumulator; 7 - gas distribution valve; 8 - spool; 11 - the piston of the valve timing; 17 - the piston of the drive valve-shutoff; 18 - shutoff valve; 20 - spring.

Figure 2. The drive circuit of the charging pump of the hydraulic accumulator of the drive system of the gas distribution valve of the internal combustion engine by the working fluid from the cylinder of the internal combustion engine.

1 - internal combustion engine piston; 2 - a combustion chamber; 3 - the piston of the pump drive; 4, - the piston of the pump; 5, 23 - check valve; 6 - accumulator; 7 - gas distribution valve; 8 - stopper piston; 9, 12, 13, 16, 17, 18 - pipelines and channels; 10 - stopper; 11 - spool control fluid flow; 14 - the piston of the valve timing; 15 - stock; 19 - compensation tank; 20 - safety valve; 21 - a spring of a stopper; 22 - spring of the piston of the pump; 24, 25 - bellows.

Claims (1)

A method for controlling exhaust gas recirculation in an internal combustion engine with a gas distribution hydraulic drive system including a gas distribution hydraulic drive control system, a fluid flow control valve, a hydraulic accumulator, a gas distribution valve piston and a gas distribution valve, characterized in that the gas distribution hydraulic drive control system determines the mass fuel mass of exhaust gases and time instant Accretion of the gas distribution valve of the internal combustion engine in accordance with the set current capacity of the internal combustion engine and on the exhaust cycle of the exhaust combustion product from the cylinder of the internal combustion engine to a time specified in the control system of the hydraulic drive of the gas distribution valve, sends a moment of time to the fluid flow control valve from the hydraulic accumulator charged by the piston of the hydraulic accumulator pump driven by the energy of the combustion products in the chamber combustion of an internal combustion engine during a working cycle or a compression stroke of air or fuel mixture, a working fluid into the volume under the piston of the gas distribution valve actuator, as a result of which the pressure of the working fluid moves the gas distribution valve connected to it to the closed position, some of the exhaust gases remain in the cylinder of the internal combustion engine , and in the subsequent cycle of suction of air or fuel mixture into the cylinder of the internal combustion engine, the exhaust gases are mixed in the cylinder of the internal engine combustion with intake air or fuel mixture.

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