RU2576694C1 - Method of controlling exhaust gas recycling in internal combustion engine using pneumatic drive system of three-valve gas distributor with charging of pneumatic accumulator of system with gas from compensation hydraulic accumulator - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: invention relates to control recirculation of internal combustion engines (ICE). Invention consists in that the device comprises a control system which is defined according to the current capacity of the internal combustion engine determines the weight of the exhaust gas for combustion. When the piston of the engine bottom dead point on the exhaust stroke in the vicinity of the upper dead point in time when the cylinder will be determined weight management system for the exhaust of combustion fuel, the control system closes the exhaust valve. Part of the exhaust gas remains in the cylinder. In a subsequent suction stroke air or fuel mixture remaining in the cylinder of an internal combustion engine exhaust gases are mixed with the incoming into the cylinder internal combustion engine through the open inlet and the gas control valve which provides a pneumatic system with a compensation and pneumatic accumulator charging pressure reservoir gas from the combustion engine.

EFFECT: technical result is to increase the efficiency of the ICE.

1 cl, 1 dwg

Description

FIELD OF TECHNOLOGY

The invention relates to the field of power engineering.

BACKGROUND

The closest prototype of the claimed invention is RF patent 2537323 "Method for controlling exhaust gas recirculation in an internal combustion engine by a hydraulic valve of a gas distribution valve."

Summary: “The invention relates to the field of engine manufacturing. The technical result is to increase the efficiency of the engine. The essence of the invention lies in the fact that it includes a control system for a hydraulic drive of a gas distribution valve, a spool for controlling a fluid flow, a hydraulic accumulator, a piston of a drive of a gas distribution valve and a gas distribution valve. The control system of the hydraulic drive of the gas distribution valve determines the mass of fuel, the mass of exhaust gases and the timing of the closing of the gas distribution valve of the internal combustion engine in accordance with the set current power of the internal combustion engine. At the time of exhaust exhaust from the cylinder of the internal combustion engine to a point in time determined by the control system of the hydraulic drive of the gas distribution valve, the fluid flow control valve supplies the working fluid from the hydraulic accumulator to the volume under the piston of the gas distribution valve drive. Therefore, the pressure of the working fluid by the piston of the gas distribution valve drive puts the gas distribution valve connected to it into the closed position. As a result, part of the exhaust gas remains 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 gas is mixed there with the intake air or fuel mixture. "

OBJECT OF THE INVENTION

The purpose of the claimed invention is to provide control of exhaust gas recirculation in all modes of operation of an internal combustion engine (ICE) by a pneumatic drive system of a three-valve gas distributor with charging the pneumatic accumulator of the system with gas from a compensating pneumatic accumulator.

In accordance with clause 2 of Article 1350 of the Code and clause 24.5.3. (4) of the Regulation, the quotation: “The conditions of an inventive step correspond, in particular: inventions based on the addition of a known means by any known part, upon reaching an unexpected for such addition technical result due to the relationship of the supplemented part and the known means. "

SUMMARY OF THE INVENTION

The essence of the claimed invention is illustrated by a description of the principle of operation of a three-valve gas distributor of an internal combustion engine by a pneumatic drive system with charging the pneumatic accumulator of the system with gas from a compensating pneumatic accumulator.

Charging the pneumatic accumulator of the system with gas is as follows (see drawing). When starting the internal combustion engine, 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 compressor drive 3, as a result of which it moves to the right (according to the drawing). The working gas (hereinafter, the gas) located in the right cavity of the piston of the compressor 4 (through the check valve 5) enters the pneumatic accumulator of the drive system 6 (hereinafter - the pneumatic accumulator 6) and charges it. Charging the pneumatic accumulator 6 occurs at the first start of the internal combustion engine, and further recharging at working cycles. After the gas pressure in the pneumatic accumulator 6 reaches a value that ensures the optimal functioning of the three-valve gas distributor as part of the air intake valve or fuel mixture 7 (hereinafter the intake valve 7), the gas distribution valve ICE 8 (hereinafter the gas distribution valve 8) and the exhaust valve 9 (hereinafter, the exhaust valve 9), gas from the pneumatic accumulator 6 through the channel 10 enters the lower cavity of the stopper piston 11. As a result, the stopper piston 11 moves to the upper position and with unity with it the stopper 12 enters into the recess 4 of the piston compressor, blocking its movement and flow of gas into the accumulator 6 is stopped.

In the initial position, the intake valve 7 is open, and the gas distribution valve 8 and the exhaust valve 9 are closed. Gas exchange in the internal combustion engine is as follows. To ensure a suction stroke, the control system sets the gas distribution valve 8 in the open position. For this, the control system sets the spool 13 to the position as shown in the drawing. Gas from the pneumatic accumulator 6 through channels 10, 14, 15 enters the upper cavity of the piston of the gas distribution valve 16, which is connected by the rod 17 to the gas distribution valve 8, as a result of which it occupies the lower position - it opens. Air or fuel mixture through the air inlet channel 18 and the open gas distribution valve 8 enters the combustion chamber of the engine 2. From the lower cavity of the piston of the gas distribution valve 16, the exhaust gas flows through the channels 19, 20, 21 and the check valve 22 into the compensation pneumatic accumulator 23. When lowering the gas pressure in the pneumatic accumulator 6 is lower than the value that ensures the optimal functioning of the valves of the three-valve gas distributor, the spring of the stop 24 moves the piston of the stop 11 and the stop 12 to the lower position. At one of the subsequent strokes of the intake of air or fuel mixture into the combustion chamber of the engine 2, the spring of the compressor piston 25 transfers the compressor drive piston 3 and the compressor piston 4 to the original, left, position for charging the pneumatic accumulator 6. Gas from the compensation pneumatic accumulator 23 is supplied through the non-return valve 26 to the right cavity of the piston of the compressor 4. The compressor is ready for the next cycle of recharging the pneumatic accumulator 6. Upon the arrival of the ICE piston 1 to the bottom dead center, the control system puts the spool 13 into the right position. Gas from the pneumatic accumulator 6 through the channels 10, 14, 19 enters the lower cavity of the piston of the drive of the gas distribution valve 16, and the gas distribution valve 8 closes. The exhaust gas from the upper piston drive of the gas distribution valve 16 through the channels 15, 27, 21 and the check valve 22 enters the compensation pneumatic accumulator 23. The compression cycle begins, and then the expansion cycle of the combustion products begins. To ensure the exhaust gas exhaust cycle, the control system closes the intake valve 7, opens the gas distribution valve 8 and exhaust valve 9. To close the intake valve 7, the control system puts the spool 28 in the left position. Gas from the pneumatic accumulator 6 through channels 10, 29, 30 enters the left cavity of the piston of the inlet valve actuator 31 and moves the inlet valve 7 connected to it by the rod 32 to the right, and it closes. Gas from the right cavity of the piston of the intake valve drive 31 through the channels 33, 34, 21 and through the check valve 22 enters the compensation air accumulator 23. To open the exhaust valve 9, the control system puts the spool 35 in the right position. Gas from the pneumatic accumulator 6 through channels 10, 36 and 37 enters the right cavity of the piston of the actuator of the exhaust valve 38 and moves the exhaust valve 9 connected to it by the stem 39 to the left, and it opens. The exhaust gas from the left cavity of the piston of the exhaust valve drive 38 through the channels 40, 41, 21 and through the check valve 22 enters the compensation pneumatic accumulator 23. The opening of the gas distribution valve 8 is shown above. As a result, the exhaust combustion products from the combustion chamber of the engine 2 through the exhaust exhaust channel 42 are thrown into the exhaust manifold. The problems of preventing fluid leakage through gaps on the generatrix surfaces of the valve stem 17, the intake valve stem 32, the exhaust valve stem 39 and the piston rod of the compressor drive 43 are solved by bellows 44, 45, 46, 47.

Management of exhaust gas recirculation in all modes of operation of the internal combustion engine by the pneumatic drive system of a three-valve gas distributor with charging the pneumatic accumulator of the system with gas from the compensation pneumatic accumulator is carried out as follows. The control system determines the mass of fuel and the mass of exhaust gases corresponding to the set current engine power to ensure fuel combustion. At the stroke of the exhaust from the cylinder of the internal combustion engine 2 of the exhaust combustion products when the piston of the internal combustion engine 1 moves from the bottom dead center to the top dead center in the vicinity of the top dead center, the control system closes the exhaust valve 9. Some of the exhaust gases remain in the cylinder. The internal combustion engine piston reaches top dead center, and the control system opens intake valve 7. At a subsequent suction stroke, the remaining exhaust gases in the cylinder are mixed with air or fuel mixture entering there through gas distribution valve 8.

SUMMARY OF THE INVENTION

A method of controlling exhaust gas recirculation in an internal combustion engine by a pneumatic drive system of a three-valve gas distributor with charging the system pneumatic accumulator with liquid from a compensating air accumulator including a control system and a three-valve gas distributor as a part of an exhaust valve, a gas distribution valve and an intake valve, characterized in that the control system of the gas valve has a three-valve actuator with charging the pneumatic accumulator of the system with gas and the compensation pneumatic accumulator in accordance with the set current capacity of the internal combustion engine determines the mass of exhaust gases to ensure fuel combustion and when the piston of the internal combustion engine moves from bottom dead center to top dead center on the cycle of exhaust exhaust from the cylinder of the internal combustion engine in the vicinity of top dead center at the time when the exhaust mass determined by the control system is in the cylinder of the internal combustion engine gas to ensure combustion of fuel, closes the exhaust valve, part of the exhaust gas remains in the cylinder and at the subsequent intake stroke of the air or fuel mixture remaining in the cylinder of the internal engine exhaust is mixed with air or fuel entering the cylinder of the internal combustion engine through the open intake valve and gas distribution valve a mixture.

DETAILED DESCRIPTION OF THE INVENTION

Materials and technology for the implementation of the claimed invention do not go beyond the scope of modern capabilities. At the current level of development of automatic control systems, the creation of a control system for the claimed invention is quite an ordinary task.

BRIEF DESCRIPTION OF THE DRAWINGS

Schematic diagram of the three-valve gas distributor of the internal combustion engine with a hydraulic drive system with charging the hydraulic accumulator of the system with liquid from the compensation hydraulic accumulator

1 - piston ICE 1; 2 - combustion chamber of the internal combustion engine 2; 3 - the piston of the compressor drive; 4 - compressor piston; 5, 22, 26 - check valve; 6 - pneumatic accumulator; 7 - inlet valve; 8 - gas distribution valve; 9 - exhaust valve; 10, 14, 15; 19, 20, 21, 27, 29, 30, 33, 34, 36, 37, 40, 41 - channel; 11 - stopper piston; 12 - stopper; 13, 28, 35 - spool; 16 - the piston of the valve timing; 17, 32, 39 - stock; 18 - channel air intake; 23 - compensation pneumatic accumulator; 24 - a spring of a stopper; 25 - compressor piston spring; 31 - the piston of the intake valve actuator; 38 - piston drive exhaust valve; 42 - channel exhaust exhaust products; 43 - the piston rod of the compressor drive; 44, 45, 46, 47 - bellows.

Claims (1)

A method for controlling exhaust gas recirculation in an internal combustion engine with a pneumatic drive system of a three-valve gas distributor with charging the system pneumatic accumulator with gas from a compensating air accumulator including a control system and a three-valve gas distributor as part of an exhaust valve, a gas distribution valve and an intake valve, characterized in that the control system of the gas valve has a three-valve actuator with charging the pneumatic accumulator of the system with gas from the com the pneumatic accumulator in accordance with the set current capacity of the internal combustion engine determines the mass of exhaust gases to ensure fuel combustion and when the piston of the internal combustion engine moves from bottom dead center to top dead center on the exhaust cycle of exhaust combustion products from the cylinder of the internal combustion engine in the vicinity of top dead center at the time when the exhaust gas mass determined by the control system is in the cylinder of the internal combustion engine In order to ensure fuel combustion, it closes the exhaust valve, some of the exhaust gases remain in the cylinder, and at the subsequent intake stroke of the air or fuel mixture, the exhaust gases remaining in the cylinder of the internal combustion engine are mixed with the air entering the cylinder of the internal combustion engine through the open intake valve and gas distribution valve or fuel mixture.