SU1562515A1 - Arrangement for starting and reversing ic-engine - Google Patents

Abstract

The invention makes it possible to increase the efficiency of engine reversal by braking it without using compressed air. When the engine brakes during its reversal, when the gas distribution is already installed in reverse, and the engine crankshaft continues to rotate in the same direction under the action of the propeller, in the remote automated control system (DAU) a pneumatic error signal is generated, which is fed into the control cavity normally closed servo valve 10 and opens it. Compressed air from the compressed air source 6 through line 11 through the reversing valve 7 is fed into the control cavity of the starting valve 1 and opens it, while the starting valve 1 will be in the open state during the whole process of deceleration until the engine is completely stopped. In the deceleration mode, the start signal in the DAU system is absent, excluding the supply of counter-air. In the compression stroke, air from the engine cylinder through line 2 is pushed into the cavity "c" of the distributor body 3, pushes the membrane 18 and is released into the atmosphere through discharge ports "g". When the piston moves to the bottom dead center, air is sucked into the engine cylinder, however, the diaphragm 18 closes the opening "g" and prevents air from entering the cavity "into" the distributor 3. In the engine cylinder, air is rarefied due to external expenditure energy, i.e., contributing to effective inhibition. After the crankshaft stops in the DAU system, a start signal is generated, and the error signal is blocked. The trigger signal is fed into the control cavity of the main starting valve 5 and opens it, providing air from the compressed air source 6 into the cavity "a" of the distributor body 3, in which the piston 14, compressing the spring 15, moves upwards and opens the outlet opening with its lower cut. "b", allows access of the compressed air to the working cavity of the starting valve 1. The starting valve 1 is opened by means of a distributor in accordance with the order of operation of the cylinders and provides access of the compressed air to the engine cylinder, as a result At the same time, the engine crankshaft is unwinding. 1 hp f-ly, 1 ill.

Description

a pneumatic mismatch signal, which is fed into the control cavity of the normally closed servo valve 10 and opens it. Compressed air from the compressed air source 6 through line 11 through the reversing valve 7 is fed into the control cavity of the starting valve 1 and opens it, while the starting valve 1 will be in the open state during the whole braking process until the engine is completely stopped. In the braking mode start 10

body 3 "In the engine cylinder, air is rarefied due to the consumption of external energy, i.e. promotes effective braking. After the crankshaft stops in the DAU system, a start signal is generated, and the error signal is blocked. The trigger signal is supplied to the control cavity of the main starting valve 5 and opens it, providing air access from the source 6 of compressed air to the cavity a of the distributor body 3, in which

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the coke signal in the DAU system is missing - the 15th piston, compressing the spring 15, re- /

No, excluding the supply of counter air. At the compression stroke, air from the engine cylinder through line 2 is pushed into the cavity in the distribution

placed upward and with its lower cut opens the outlet opening b, allowing the access of compressed air to the working cavity of the starting valve 1. Starting

organ 3, depresses the membrane 18 and removes the UD-1 20 into the valve 1 with

enters the atmosphere through discharge openings of g. When the piston moves to the bottom dead center,

the process of sucking air into the cylinder ... ",

the motor, however, the membrane 18 closes the process of unwinding the crankshaft hole g and prevents the engine from getting up. 1 hp f-ly, spirit from the atmosphere into the cavity in the distribution of - 1 Il.

distributor in accordance with the order of the cylinder work and provides access of compressed air to the engine cylinder, as a result of which 0

body 3 "In the engine cylinder, air is rarefied due to the consumption of external energy, i.e. promotes effective braking. After the crankshaft stops in the DAU system, a start signal is generated, and the error signal is blocked. The trigger signal is supplied to the control cavity of the main starting valve 5 and opens it, providing air access from the source 6 of compressed air to the cavity a of the distributor body 3, in which

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15 piston, compressing the spring 15, re /

piston, compressing the spring 15, re- /

placed upward and with its lower cut opens the outlet opening b, allowing the access of compressed air to the working cavity of the starting valve 1. Starting

valve 1 is opened with

valve 1 is opened with

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distributor in accordance with the order of the cylinder work and provides access of compressed air into the engine cylinder, as a result of which

The invention relates to mechanical engineering, in particular to reversible internal combustion engines, namely, devices for starting and reversing internal combustion engines.

The purpose of the invention is to increase the efficiency of engine reversal by braking it without using compressed air.

The drawing shows a diagram of the proposed device.

The device contains at least one starting valve 1 installed in the engine cylinder, the working cavity of which is connected via a pipeline 2 through a distributor 3, the starting line and the main starting valve 5 is connected to a source of compressed air 6, which controls the opening of the starting valve 1 through the valve 7 pulse channel 8 is connected to the air distributor 9 on the one hand, and on the other, via a normally closed servovalve 10 by means of pipe 11 is connected to a source of compressed air 6. Control cavities of the main starting valve 5 and normally closed

The servo valve 10 is connected to a remote automated control system, and the central channel of the air distributor 9 is connected to the starting line A. via pipe 12.

The distribution body 3 includes a housing 13, in which a piston 14 is placed, pressed by a spring 15 to the lower cover 16, and an upper cover 17 on which the elastic membrane 18 is fixed

The device works as follows.

When the engine is started, a signal from the remote automated control system is fed into the control cavity of the main start valve 5, which opens, allowing air from the compressed air source 6 to the start line 4 and further into the cavity of the distributor. Under the action of air, the piston I compresses the spring 15 and moves up to the stop into the top cover 17. At the same time, the piston 1 opens the outlet b in the housing 13 with the lower cut. Compressed air from the starting ma

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the ports A through line 2 are supplied to the working cavity of the starting valve 1. At the same time, through the pipe 12, air flows to the central channel of the air distributor E, which, in accordance with the order of operation of the cylinder, sends a pneumatic signal through the pulse channel 8 through the valve 7 to the control cavity valve 1. The latter opens and provides access of compressed air to the engine cylinder. The process of cranking the engine crankshaft by air begins. When the crankshaft is rotated at a certain angle, at the command of the air distributor 9, the starting valve 1 closes and stops the flow of air into the engine cylinder.

Similar cycles are repeated until the engine develops the starting frequency of rotation, after the starting signal in the remote automated control system is blocked, the main starting valve 5 closes and provides unloading of the starting line T. The air from the cavity of the distributor 3 is released. to the atmosphere and the piston under the action of the spring 1 is moved to the lower position until it stops at the cover 16. The device returns to its original state.

When the engine is reversed while the gas distribution is already set to a predetermined stroke, and the crankshaft continues to rotate in the same direction under the action of the propeller operating in the turbine mode, a pneumatic error signal is generated in the remote automated control system cavity normally closed servo valve 10 and opens it. Compressed air from the source 6 through the pipeline 11 through the reversing valve 7 is fed into the control cavity of the starting valve, and opens it. At the same time, the starting valve 1 is in the open state during the whole process of braking until the engine is completely stopped. In the braking mode, there is no start signal in the remote automated control system. Therefore, the main starting valve 5

WITH

remains closed, eliminating the supply of counter-air.

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As the crankshaft continues to rotate in the same direction, compression and expansion processes occur in the engine cylinders. In the distribution body 3, the piston I under the action of the spring 15 is in the lower position, excluding the flow of air from the cylinder into the starting line and back. During the compression stroke, the air from the engine cylinder through line 2 is pushed into the cavity B of the distributor body 3, presses the membrane 18 and is released into the atmosphere through the discharge openings g. When the piston moves to the bottom dead center, the inverse process of air intake into the working cylinder occurs. In this case, the membrane 18 closes the openings g and excludes the entry of air from the atmosphere into the cavity in the organ 3. In the engine cylinder there is a vacuum of air associated with the expenditure of external energy. When the knee shaft is rotated 1 40-150 ° beyond the top dead center in the cylinder, the intake valve opens and upon further movement of the piston to the bottom dead center, the cylinder is filled with a SPIRIT from the intake manifold. As a result, in the engine braking mode, a countercurrent of air in the turbocharger is eliminated, which increases the efficiency of starting the engine in the opposite direction after stopping.

After the crankshaft stops in the remote automated control system, a start signal is generated and the error signal is blocked. The servo valve 10 is closed and provides unloading of the control cavity of the starting valve 1, the latter is closed. A start signal is supplied to the control cavity of the main start valve 5 and opens it. The engine is started in the reverse direction in the order described.

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Claims (2)

1. A device for starting and reversing an internal combustion engine that contains at least one engine start valve installed in the engine cylinder, the working cavity 1 of which is connected to a compressed air source through a main start valve and the control cavity is connected through a changeover valve to the air distributor on the one hand, and on the other, via a normally closed servovalve, by means of a pipeline, to a source of compressed air, and the control cavities of the main start-up valve Apaana normally closed and sulfuric voklapana connected to remote automated control system, and the central channel vozdug horaspredelitel by an additional conduit connected to the CCP The main line, characterized in that, in order to increase efficiency, it is provided with a distribution body installed between the starting line and the working cavity of the starting valve. 2. The device according to claim 1, about tl and - the fact that, the distribution body is made in the form of a spring-loaded valve and a membrane-type non-return valve placed in the upper body.