Pulse rotary cleaning device for cleaning carbon deposits in cylinder
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-08-13
Smart Images
Figure CN2025084604_13082026_PF_FP_ABST
Abstract
Description
A pulse rotary cleaning device for cleaning carbon deposits inside cylinders Technical Field
[0001] This application relates to the field of engine carbon deposit cleaning, specifically to a pulse rotary cleaning device for cleaning carbon deposits inside cylinders. Background Technology
[0002] During engine operation, carbon deposits resulting from incomplete combustion of fuel accumulate on the cylinders, pistons, and valves, leading to difficulties starting the engine, idling vibrations, reduced power, increased noise, increased fuel consumption, and excessive emissions. Severe carbon buildup can cause engine malfunctions, such as valve sticking leading to leaks and valve burning; carbon deposits between the piston and cylinder walls causing excessive wear; and in some models, carbon deposits mixed with crankcase oil forming a sludge-like mixture in the piston ring grooves, causing piston ring sticking, poor sealing, and oil burning. All of these negatively impact engine efficiency and lifespan, and increase emissions. Cleaning the combustion chamber and piston rings of carbon deposits and sludge can restore engine power output, improve fuel combustion efficiency, reduce fuel consumption, and decrease harmful emissions.
[0003] In the relevant technical field, there are four main categories of methods for cleaning carbon deposits:
[0004] I. Soaking Method: Foam or liquid cleaning agent is injected into the combustion chamber through the spark plug holes to soak and decompose carbon deposits and gum-like substances. The disadvantages are that the soaking time is relatively long, and due to physical forces and gravity, the foam gradually disappears. The cleaning fluid can flow into the crankcase through the piston gaps, resulting in poor cleaning of carbon deposits on the top of the combustion chamber. It can also cause carbon deposits to accumulate in the piston ring grooves, leading to secondary engine contamination. Furthermore, the residue after soaking is difficult to clean completely, and it can cause secondary contamination of the intake manifold and catalytic converter when compressed air is used for purging. Residue entering the intake manifold is sucked into the combustion chamber when the engine is restarted and can clog the catalytic converter, resulting in tertiary contamination of the combustion chamber and catalytic converter.
[0005] II. Carbon Deposit Removal Fuel Additives: These additives are added to the fuel tank, and during driving, the cleaner burns along with the fuel, eliminating carbon deposits in the process. However, the cleaning process is lengthy; one bottle of additive is needed for each tank of fuel, requiring hundreds of kilometers to complete. Manufacturers and service providers typically recommend using 2-6 bottles per cleaning cycle, requiring 2-6 tanks of fuel to finish, making the entire process take hundreds to thousands of kilometers. Furthermore, the residue removed can clog the catalytic converter, and the residue after combustion is released into the air, causing secondary pollution.
[0006] 3. Piston ring release agent: Adding piston ring release agent to engine lubricating oil requires driving thousands of kilometers to take effect. The release agent changes the performance of the lubricating oil. When the engine runs under high load for a long time, it will cause certain wear to the parts that rely on lubricating oil for lubrication.
[0007] IV. Reciprocating suction cleaning machine (marketed as: pulse decarbonization cleaning machine, or in-cylinder pulse circulation decarbonization cleaning machine): This involves injecting cleaning fluid into the cylinder through the spark plug hole, repeatedly injecting and extracting to peel off and dissolve carbon deposits in the cylinder into the cleaning fluid. Finally, the residual liquid is sucked out and cleaned with high-pressure air. Its disadvantages are: ① The dissolved residue will deposit in the gap between the cylinder wall and the piston and the piston ring gap; ② Some of the open valves will cause the residue to flow into the intake manifold and exhaust manifold during the suction process, contaminating the intake and exhaust passages and further dissolving the carbon deposits in the intake passage. Compressed air is difficult to remove the residue in the intake passage, which will cause difficulty in starting on the first start. After starting, the residue in the intake manifold will be sucked into the cylinder, causing secondary pollution, and will also contaminate and block the three-way catalytic converter through the exhaust chamber.
[0008] 5. Cleaning intake manifold carbon deposits with walnut shells or dry ice: This requires removing the intake manifold and using a dry ice machine or walnut shell cleaner to spray the carbon deposits on the intake manifold and the back of the valves. This involves a lot of disassembly and reassembly work and takes a long time to clean.
[0009] VI. Repair Method: Disassembling the engine to remove carbon: This method requires disassembling most of the engine parts. Its disadvantages are that it takes a long time, uses a lot of consumables, involves a large workload, is expensive, and the disassembly and reassembly process may change the original vehicle assembly requirements, thus affecting the engine's performance and lifespan.
[0010] Chinese patent CN112031916A discloses an engine cylinder carbon cleaning device. It is driven by a pneumatic motor to rotate the cleaning tube head and is also equipped with a drying device and a liquid suction device. The liquid is sucked out by the liquid suction funnel on the waste liquid collection pipe through the filter plate contacting the liquid. It requires a lot of additional devices, cannot clean during the engine movement process, has high assembly requirements, and cannot meet the usage requirements. Technical solutions
[0011] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pulse rotary cleaning device for cleaning carbon deposits in a cylinder, comprising a valve seat and a pulse rotary cleaning assembly. The valve seat is used to combine or connect a solenoid valve assembly. The pulse rotary cleaning assembly is connected to an external liquid storage tank assembly through the valve seat. The solenoid valve assembly controls the external liquid storage tank assembly to inject compressed air into the cylinder through the valve seat and the pulse rotary cleaning assembly. The pulse rotary cleaning assembly includes a guide pipe connected to the outlet end of the valve seat. The outlet end of the guide pipe is connected to a spray pipe shell. The spray pipe is movably disposed within the spray pipe shell. One end of the spray pipe extending out of the spray pipe shell is the spray pipe head. One or more eccentric side spray ports are provided on the side of the spray pipe head. A receiving surface is provided on the inner bottom surface of the spray pipe head. When the compressed air entering the spray pipe impacts the receiving surface, the rebound effect of the receiving surface causes the entering compressed air to be sprayed in a rearward direction, making its eccentric side spray ports form an eccentric guide cavity, thereby causing the spray pipe to rotate relative to the spray nozzle shell.
[0012] Preferably, the side injection port is a 1-shaped side injection port; the compressed air passing through the side injection port is ejected outward in the form of a fan-shaped surface, and at the same time, the fan-shaped surface formed by the next injection from the side injection port overlaps with a part of the previous fan-shaped surface.
[0013] Preferably, a fan-shaped groove wall is provided inward on the side of the side spray nozzle away from the head of the spray pipe, so that the side spray nozzle forms a side spray nozzle with a fan-shaped cross section.
[0014] Preferably, the receiving surface is an arc-shaped end face that is recessed towards the head of the injection pipe, and the receiving surface is a closed receiving surface.
[0015] Preferably, the receiving surface is a semi-enclosed receiving surface, and a bottom spray nozzle in the shape of an "I" is provided at the center of the receiving surface.
[0016] Preferably, the end of the bottom injection port is located below the side injection port.
[0017] Preferably, a first abutment surface and a second abutment surface are provided at the connection between the injection pipe shell and the injection pipe. When the injection pipe moves towards the valve seat, the first abutment surface limits the injection pipe. When the injection pipe moves away from the valve seat, the second abutment surface limits the injection pipe. At the same time, the outside of the injection pipe contacts the second abutment surface through an elastic body, so that the injection pipe can move up and down along the injection pipe shell under the action of compressed air.
[0018] Preferably, the upper part of the injection pipe housing is provided with a bidirectional threaded locking nut, the inner side of the upper end of the bidirectional threaded locking nut is provided with a bidirectional thread for connecting to the guide pipe, and the lower end is provided with an external thread for connecting to the spark plug hole.
[0019] Preferably, the compressed air includes pure compressed air or a two-fluid mixture gas with added cleaning agent or solid particles.
[0020] Preferably, the solenoid valve assembly includes a liquid-adding solenoid valve, a main control solenoid valve, and a high-pressure shut-off normally open one-way exhaust valve. Beneficial effects
[0021] The advantages of this invention compared to the prior art are:
[0022] (1) This device can clean the engine during operation, and the residue is discharged from the engine intake passage. The residue will not cause secondary pollution to the combustion chamber space and the three-way catalytic converter.
[0023] (2) By setting an arc bearing surface perpendicular to the flow direction, the force points of compressed air when in contact with the bearing surface can be more concentrated, so that the flow rate of compressed air discharged through multiple injection ports is consistent.
[0024] (3) By setting an eccentric side injection port on the injection pipe, the injection pipe can be rotated under the push of compressed air, and the compressed air can be sprayed out in the form of a fan. The fan areas of each spray intersect, and a secondary cleaning is performed to achieve 180° circumferential cleaning of the combustion chamber space without leaving any cleaning blind spots. In addition, the vortex airflow generated by the eccentric compressed air flow through the eccentric injection port can blow away the residue in the combustion chamber in all directions.
[0025] (4) By setting a side injection port with a fan-shaped groove wall, the side injection port can have a larger flow rate, a more reliable guiding effect, and effectively cover the top edge of the piston.
[0026] (5) By adding a bottom injection port at the center of the receiving surface, the compressed air passing through the injection pipe can be directly sprayed into the top of the piston in a fan shape, thereby increasing the cleaning effect.
[0027] (6) By setting an elastic element between the injection pipe and the injection pipe housing, the injection pipe can extend and retract within the injection pipe housing during operation, so that the injection pipe can both extend into the cylinder to complete the rotation and rearward cleaning functions and the piston top, and prevent the injection pipe from colliding with the piston top.
[0028] (7) When the intake valve is open, compressed air directly flushes the back of the valve and the intake manifold cavity, eliminating the tedious and time-consuming work of disassembling and assembling the intake manifold.
[0029] (8) The cleaning process of this device is carried out in a closed environment inside the equipment and is collected by a vacuum cleaner, which will not cause leakage or contamination of the external parts of the engine. It is convenient to collect the cleaning residue by the vacuum cleaner for harmless treatment, and will not discharge the harmful substances generated during the cleaning process into the ground and sewers. Due to the continuous reciprocating motion of the piston, the residue in the piston ring groove and on the cylinder wall is continuously pushed to the top of the cylinder wall, so that the residue can be thoroughly washed and discharged.
[0030] (9) Compared with fuel additives, the use of this application will not release carbon deposit decomposition products into the road and atmosphere during driving, and the cleaning time only takes a few minutes to tens of minutes;
[0031] Compared to the soaking method, which takes several hours to more than 12 hours to solve the problem of oil burning caused by piston ring sticking, this application only requires adding piston ring solvent when cleaning carbon deposits in the cylinder, which improves efficiency by dozens of times.
[0032] Compared to adding piston ring slow-release agents to the engine lubricating oil to solve the problem of piston ring sticking and oil consumption, this application has a shorter cleaning time, lower load, and almost no wear on engine parts during the cleaning process.
[0033] Compared to the reciprocating suction cleaning method, this application uses pure two-fluid compressed air for rinsing and collects it in real time with a vacuum cleaner. The concentration of residue in the cylinder will not increase, and the dissolved carbon deposits will not accumulate between the cylinder wall, piston, and piston rings. After cleaning, the engine will start successfully on the first try, and ignition will not be affected by liquid or residue in the cylinder.
[0034] Compared to traditional methods of disassembling the engine to clean carbon deposits, using this application for cleaning is faster, cheaper, and simpler, and will not change the original vehicle assembly requirements, thus not affecting engine performance and lifespan.
[0035] (10) One end of the pulse rotary cleaning component of this device is connected to the solenoid valve through a quick connector, and the other end is installed in the mounting hole of the spark plug through a thread, making the installation process convenient; by setting a two-way thread on the spray pipe housing, when the pulse rotary cleaning component is removed by turning it left in the spark plug hole, it is subjected to the reaction force of the two-way thread nut, so that the guide and the spray nozzle housing are tightened more and more, and the guide and the spray nozzle housing are prevented from separating. Attached Figure Description
[0036] Figure 1 is a schematic diagram of the installation state of a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0037] Figure 2 is a front view of a pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to the present invention;
[0038] Figure 3 is a right view of a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0039] Figure 4 is a schematic diagram of the internal structure of a pulse rotary cleaning device for cleaning carbon deposits in a cylinder according to the present invention.
[0040] Figure 5 is a schematic diagram of the internal structure of the high-pressure closed normally open one-way exhaust valve in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0041] Figure 6 is a cross-sectional schematic diagram of the high-pressure closed normally open one-way exhaust valve in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0042] Figure 7 is a cross-sectional schematic diagram of the high-pressure closed normally open one-way exhaust valve in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0043] Figure 8 is a schematic diagram of the spray pipe in a pulse rotary cleaning device for cleaning carbon deposits in a cylinder according to the present invention.
[0044] Figure 9 is an enlarged schematic diagram of the end of the spray pipe in a pulse rotary cleaning device for cleaning carbon deposits in a cylinder according to the present invention.
[0045] Figure 10 is a schematic diagram of the bottom of the spray pipe in a pulse rotary cleaning device for cleaning carbon deposits in a cylinder according to the present invention.
[0046] Figure 11 is a schematic diagram of the internal structure of the spray pipe in a pulse rotary cleaning device for cleaning carbon deposits in a cylinder according to the present invention.
[0047] Figure 12 is a schematic diagram of the internal structure of the spray pipe shell in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0048] Figure 13 is a schematic diagram of a bidirectional threaded locking nut in a pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to the present invention.
[0049] Figure 14 is a schematic diagram of the I-shaped side spray nozzle in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention.
[0050] Figure 15 is an enlarged schematic diagram of the I-shaped side spray nozzle in a pulse rotary cleaning device for cleaning carbon deposits in cylinders according to the present invention. Attached Figure
[0051] 1. Pulse rotary cleaning assembly; 2. Exhaust manifold; 2-1. Exhaust manifold chamber; 3. Intake manifold; 3-1. Intake manifold chamber; 4. Exhaust valve; 4-1. Exhaust valve back; 5. Intake valve; 5-1. Intake valve back; 6. Piston top; 7. Combustion chamber top; 8. Cylinder wall; 9. Combustion chamber; 10. Piston ring; 11. Piston; 12. Fluid filling solenoid valve; 13. Main control solenoid valve; 14. High-pressure closed normally open one-way exhaust valve; 14-1. Valve core seat; 14-2. Valve core vane; 14-3. Valve core; 14-4. Duckbill one-way valve; 14-5. Fixing sleeve; 14-6. Snap ring; 14-7. Moving channel; 14-8. End sleeve; 14-9. Return spring; 14-10. Valve core push rod; 15. T-connector; 16. Exhaust channel ; 17. External air supply pipe; 18. External cleaning fluid pipe; 19. Negative pressure switch; 20. Vacuum tube; 21. Guide pipe; 21-1. Guide chamber; 21-2. First abutment surface; 22. Two-way threaded locking nut; 22-1. First direction thread; 22-2. Second direction thread; 25. Spray pipe shell; 25-1. Second abutment surface; 25-2. Upper connecting cavity; 25-3. Lower connecting cavity; 25-3a. Spray pipe movable cavity; 25-3b. Elastomer mounting cavity; 26. Elastic element; 27. Spray pipe; 27-1. Side spray port; 27-2. Spray chamber; 27-3. Receiving surface; 27-4. Fan-shaped groove wall; 27-5. Bottom spray port; 27-6. Abutment ring; 28. Valve seat; 29. Quick connector; 29-1. Quick connector male. Embodiments of the present invention
[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0053] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0054] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0055] In the description of the embodiments of the present invention, "a plurality of" means at least one.
[0056] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances. Example
[0057] Referring to Figure 1, generally, a cylinder has a combustion chamber 9, a spark plug mounting hole or fuel injector mounting hole, an intake manifold chamber 3-1, and an exhaust manifold chamber 2-1. The cylinder contains a piston 11, piston rings 10 located in the combustion chamber 9, and an exhaust valve 4 and an intake valve 5 for controlling the opening and closing of the intake and exhaust passages. The upper part of the exhaust valve 4 is the exhaust valve back 4-1, and the upper part of the intake valve 5 is the intake valve back 5-1. A vacuum cleaner is installed at the intake valve 5. In this embodiment, the cylinder refers to the cylinder inside the engine. When the engine is running normally, the piston 11 will move back and forth in the combustion chamber 9, drawing in air through the intake passage and discharging the exhaust gas after combustion through the exhaust passage.
[0058] Referring to Figures 1-4, the pulse rotary cleaning device provided in this embodiment is installed in the spark plug mounting hole or fuel injector mounting hole, and includes:
[0059] The valve seat 28 and the pulse rotary cleaning assembly 1 are included. One end of the pulse rotary cleaning assembly 1 is mounted on the engine spark plug hole, and the other end is connected to the valve seat 28 via a quick connector 29. A quick-connect male connector 29-1 is provided on the guide tube 12, and a quick-connect female connector is provided on the valve seat 28. The valve seat 28 is a conventional structure, which is a detachable surface component inside the valve. It is used to support the valve core 14-3 in the fully closed position and forms a sealing pair. Those skilled in the art can select the corresponding valve seat 28 according to the specific valve.
[0060] Referring to Figures 1-7, valve seat 28 is used to combine or connect the solenoid valve assembly. The pulse rotary cleaning assembly 1 is connected to the external liquid storage tank assembly through valve seat 28. The solenoid valve assembly controls the external liquid storage tank assembly to inject compressed air into the cylinder through valve seat 28 and pulse rotary cleaning assembly 1. Specifically, the solenoid valve assembly includes a liquid adding solenoid valve 12, a main control solenoid valve 13, and a high-pressure closed normally open one-way exhaust valve 14. The liquid adding solenoid valve 12 is used to add liquid cleaning agent to the flowing compressed air. The main solenoid valve is used to inject compressed air or two-fluid mixed compressed air into the pulse rotary cleaning assembly 1 during different cylinder strokes. The high-pressure closed normally open one-way exhaust valve 14 is closed when injecting compressed air into the combustion chamber 9, and is open at normal pressure and during the compression stroke. Valve seat 28 combines or connects the above functions together.
[0061] Specifically, a three-way connector 15 communicating with the guide pipe 12 is provided on one side of the valve seat 28, and an air outlet channel 16 communicating with the guide pipe 12 is provided on the other side. The valve seat 28 is connected to the external air source pipe 17 and the external cleaning liquid pipe 18 through the three-way connector 15. The liquid adding solenoid valve 12 is provided on the external cleaning liquid pipe 18, and the high pressure closed normally open one-way exhaust valve 14 is vertically provided on the air outlet channel 16.
[0062] The main control solenoid valve 13 is connected to the engine control system of the cylinder to be cleaned to obtain the ignition signal of the engine cylinder, that is, the ignition signal of the power stroke. The ignition signal obtained when the piston is at top dead center activates the solenoid valve to inject compressed air into the cylinder to start the engine. At the same time, the main control solenoid valve 13 is also connected to the negative pressure switch 19. The negative pressure switch 19 is connected to the guide pipe 12 through the vacuum tube 20, thereby obtaining the negative pressure signal generated when the piston moves down in the cylinder to be cleaned. Specifically, when both the engine intake and exhaust valves are closed... (Power stroke) When the piston moves downward, it generates negative pressure. The negative pressure switch 19 generates a negative pressure signal to start the main control solenoid valve 13 to inject compressed air into the cylinder. When the engine is in the intake stroke, the engine exhaust valve is closed and the intake valve is open. At the same time, a vacuum cleaner is installed at the intake valve, and there is always negative pressure in the intake manifold. When the intake valve opens, the negative pressure is transmitted to the cylinder. The negative pressure switch 19 connected to the guide chamber of the valve seat 28 generates a signal to open the liquid filling solenoid valve 12 to inject compressed air and cleaning fluid into the cylinder.
[0063] Specifically, the high-pressure closed normally open one-way exhaust valve 14 comprises a valve core seat 14-1, a valve core 14-3 and a valve core blade 14-2 covering the inlet of the high-pressure closed normally open one-way exhaust valve 14, and the other end of the valve core seat 14-1 is in contact with a duckbill one-way valve 14-4 via a valve core push rod 14-10. A fixing sleeve 14-5 connected to the valve core seat 14-1 is provided outside the duckbill one-way valve 14-4. A corresponding retaining ring 14-6 is provided at one end near the outlet of the duckbill check valve 14-4. A movable channel 14-7 is provided on the valve seat 28 for the valve core push rod 14-10 to extend into. An end sleeve 14-8 for pushing the duckbill check valve 14-4 is provided at one end of the valve core push rod 14-10 extending out of the movable channel 14-7. A return spring 14-9 is sleeved on the portion of the valve core push rod 14-10 located between the movable channel 14-7 and the valve core 14-3. In this embodiment, the high-pressure closed normally open one-way exhaust valve 14 is a multi-functional valve. It has the function of maintaining one-way exhaust when low-pressure air is generated in the cylinder, closing the exhaust valve when high-pressure air is introduced, and cutting off the one-way air intake of the exhaust valve when the piston moves downward and generates negative pressure. Specifically, it discharges air when the piston is in the compression stroke to eliminate the reaction force of compressed air on the piston; closes the exhaust valve when air is injected into the cylinder to prevent leakage; and cuts off the exhaust valve from external air when the piston is in the intake stroke to maintain the negative pressure suction generated by the piston's downward movement.
[0064] In this embodiment, the compressed air includes pure compressed air or a two-fluid mixture gas with added cleaning agent or solid particles; the solid particles refer to particles with cleaning function such as dry ice or walnut shells.
[0065] Referring to Figures 3-9, specifically, the pulse rotary cleaning assembly 1 includes a guide pipe 12 connected to the outlet end of the valve seat 28. The outlet end of the guide pipe 12 is connected to the spray pipe 27 via the spray pipe housing 25. The spray pipe 27 is movably disposed within the spray pipe housing 25. One end of the spray pipe 27 extending out of the spray pipe housing 25 is the head of the spray pipe 27. One or more eccentric side spray ports 27-1 are provided on the side of the head of the spray pipe 27, and the eccentric angle depends on the required rotation speed and spray direction. A jet chamber 27-3 is provided on the inner bottom surface of the head of the jet pipe 27. In this embodiment, the jet chamber 27-3 is an arc-shaped end face that is concave towards the head of the jet pipe 27. The jet chamber 27-3 is a closed jet chamber 27-3. When the compressed air entering the jet pipe 27 impacts the jet chamber 27-3, the rebound effect of the jet chamber 27-3 causes the incoming compressed air to be ejected in the rear-side direction, so that its eccentric side jet port 27-1 forms an eccentric guide channel, thereby causing the jet pipe 27 to rotate relative to the jet pipe outer shell 25.
[0066] Meanwhile, referring to Figure 12, the upper part of the jet pipe housing 25 is provided with an upper connecting cavity 25-2 for the guide pipe 12, and the lower part is provided with a lower connecting cavity 25-3 for the jet pipe 27. The lower connecting cavity 25-3, moving away from the upper connecting cavity 25-2, is provided with a jet pipe movable cavity 25-3a and an elastomer mounting cavity 25-3b in sequence. At the end of the jet pipe 27 near the guide pipe 12, an abutment ring 27-6 adapted to the jet pipe movable cavity 25-3a is provided outwards. The end of the guide pipe 12 that contacts the abutment ring 27-6 forms a first abutment surface 21-2. The inner diameter of the elastomer mounting cavity 25-3b is smaller than that of the jet pipe movable cavity 25-3a. The inner diameter of a causes the bottom surface of the elastomer mounting cavity 25-3b to form a second abutment surface 25-1. The elastomer 26 is installed between the elastomer mounting cavity 25-3b and the abutment ring 27-6. In this embodiment, the elastomer 26 is a spring. When the injection pipe 27 moves towards the valve seat 28 to the first abutment surface 21-2, the first abutment surface 21-2 limits the movement of the injection pipe 27. When the injection pipe 27 moves away from the valve seat 28 under the action of compressed air, the second abutment surface 25-1 limits the injection pipe 27. At the same time, under the action of the elastomer 26, the injection pipe 27 can return to its initial position when it is not under force.
[0067] Referring to Figures 9-15, in this embodiment, a fan-shaped groove wall 27-4 is provided inward on the side of the side spray port 27-1 away from the head of the spray pipe 27, so that the side spray port 27-1 forms a side spray port 27-1 with a fan-shaped cross-section; in this embodiment, the spray chamber 27-3 is a semi-enclosed spray chamber 27-3, and a U-shaped bottom spray port 27-5 is provided at the center of the spray chamber 27-3; the end of the bottom spray port 27-5 is located below the side spray port 27-1; in other embodiments, the side spray port 27-1 can also be a I-shaped side spray port 27- 1. Simultaneously, the receiving surface 27-2 at the bottom of the injection chamber 27-3 can be set as a closed type; the bottom injection port 27-5 at the center of the injection chamber 27-3 is increased, which can directly spray a fan-shaped jet onto the piston top 6. In specific settings, the width of the bottom injection port 27-5 is preferably 1 mm to avoid its excessive width weakening the thrust of the injection chamber 27-3 to the side and rear; on the other hand, in this embodiment, the side injection port 27-1 is set as a fan shape, which has a larger cross-sectional width, which can make the side injection port flow larger, the guiding effect more reliable, and effectively cover the edge of the piston top 6;
[0068] Compressed air passing through the side injection port 27-1 is ejected outward in a fan-shaped pattern to complete the cleaning of one fan-shaped area. At the same time, since the main solenoid valve can inject compressed air or two-fluid mixed compressed air into the pulse rotary cleaning assembly 1 during different cylinder strokes, the rotation angle of the injection pipe 27 can be controlled by controlling the amount of compressed air injected through the main solenoid valve. Furthermore, through the specific setting of the main control solenoid valve 13, the fan-shaped area formed by the next injection from the side injection port 27-1 overlaps with a part of the previous fan-shaped area to achieve the effect of cleaning the top of the cylinder without blind spots. In addition, according to experimental data, the injection pipe 27 is pushed into the cylinder by 10-15 mm during injection, so that the injected compressed air can completely cover the top fan-shaped area. At the same time, in the specific setting, the pushing distance needs to be set to be less than the distance between the piston 11 and the top of the combustion chamber 7 to avoid the head of the injection pipe 27 hitting the piston top 6. When the side injection port 27-1 rotates to the valve position, the ejected compressed air washes the carbon deposits on the back of the open valve and the intake manifold 3.
[0069] Furthermore, since the pulse rotary injection assembly is installed in the spark plug hole, the injection nozzle in the pulse rotary injection assembly requires replacement of the injection pipe housing 25 and injection pipe 27 due to different installation dimensions of the spark plug hole. Therefore, the guide pipe 12 is threadedly connected to the injection pipe housing 25. Additionally, since the thread is inside the spark plug mounting cavity, the threaded connection is prone to detachment during disassembly after cleaning, making it impossible to remove the injection pipe housing 25. Therefore, the upper and lower ends of the injection pipe housing 25 are provided with double-direction threaded locking nuts 22. The upper inner side of the double-direction threaded locking nut 22 is provided with a first-direction thread 22-1 for connection with the guide pipe 12, and the lower end is provided with... There is a second direction thread 22-2 that connects to the spark plug hole; the first direction thread 22-1 and the second direction thread 22-2 have opposite thread directions. The specific usage method is as follows: First, screw the first direction thread 22-1 end of the injection pipe housing 25 into the thread of the guide tube 12 by turning it clockwise. After the injection pipe housing 25 is connected to the guide tube 12, turn the injection pipe housing 25 clockwise to the guide tube 12, and then turn it counterclockwise in the spark plug hole to remove the pulse rotary cleaning component 1. When the component is removed, it is subjected to the reaction force of the bidirectional threaded nut, and the guide component and the nozzle housing rotate in the tightening direction, which will tighten more and more, thus preventing the guide component from separating from the nozzle housing.
[0070] There are generally two methods for cleaning cylinders: manual cleaning and automatic circulating cleaning. The working principle of automatic circulating cleaning is as follows:
[0071] Corresponding to the four strokes of the engine itself, the automatic control device is set to automatically collect the working signals of the cylinders. Based on the signals obtained from the cylinder operation, the opening timing and delay time of the solenoid valve are set, and the injection timing is automatically controlled, which can simultaneously and automatically complete the cleaning work of all engine cylinders.
[0072] The following are the cleaning procedures for the four strokes:
[0073] During the intake stroke, the intake valve opens and compressed air is injected; during the compression stroke, both intake and exhaust valves 4 close and the automatic exhaust valve opens; during the power stroke, both intake and exhaust valves 4 close and compressed air is injected; during the exhaust stroke, exhaust valve 4 opens and exhaust gas is discharged.
[0074] The manual cleaning process is as follows: by rotating the crankshaft, the intake or exhaust valve 4 is placed in the open state, which makes it easy for the residue to be discharged from the valve and intake manifold 3. The external manual air source trigger is manually operated to intermittently spray the mixed gas into the combustion chamber 9 in a burst manner. The effect is similar to that of automatic cleaning, but only one cylinder can be cleaned at a time.
[0075] The automatic cleaning process is as follows: the engine controller collects the top dead center signal of piston 11 during the engine cylinder stroke, and activates the opening timing and delay time of the filler solenoid valve 12 and the main control solenoid valve 13. It should be noted that in this embodiment, before starting, the fuel line needs to be disconnected to stop fuel supply to the injectors. After all preparations are complete, the crankshaft needs to be moved more than half a turn (approximately one second) using the key or one-button starter, causing piston 11 in the engine cylinder to perform four strokes of reciprocating motion.
[0076] Specifically, the actions in this embodiment during automatic cleaning are as follows:
[0077] (1) When the engine injector is cut off, start the ignition switch; after the piston 11 enters the reciprocating motion, the engine controller receives the signal that the piston 11 has reached the top dead center and starts the cleaning process.
[0078] (2) Intake stroke; the engine controller receives a signal that the piston 11 has reached the top dead center; at this time, the intake valve is open; the injection pipe 27 injects compressed air into the combustion chamber 9 and discharges it through the intake valve. After the piston 11 reaches the bottom dead center, the injection stops.
[0079] (3) Compression stroke; after the intake stroke ends, the intake valve closes; the piston 11 moves upward to compress the remaining gas upward; through the injection pipe 27 cavity and the guide pipe 12 cavity, it is discharged from the automatic exhaust valve connected to the cavity to eliminate the resistance when the piston 11 moves upward.
[0080] (4) Power stroke; after the compression stroke ends, piston 11 is at top dead center and both intake and exhaust valves 4 are closed; when the control signal receives the power signal, the injection pipe 27 injects compressed air into the combustion chamber 9; pushes piston 11 downward to do work, so that the engine runs; before piston 11 reaches bottom dead center, the injection stops.
[0081] (5) Exhaust stroke; after the power stroke, the exhaust valve 4 opens; the piston 11 moves upward to compress the remaining gas upward; and it is discharged through the exhaust manifold chamber 2-1.
[0082] In this embodiment, during cleaning: use the key or one-button start to make the crankshaft move more than half a turn (about one second). After the solenoid valve starts working, you can release the start key or one-button start. This application will keep the engine running under the push of compressed air. The cleaning process specifically includes the following steps.
[0083] S1. When the piston 11 of a certain cylinder enters the top dead center of the power stroke, the engine controller receives the top dead center signal and the main solenoid valve opens to inject compressed air into the cylinder. At this time, the valve core 14-3 and the elastic body of the high-pressure closed normally open one-way exhaust valve 14 are subjected to the pressure of the compressed air. The valve core 14-3 closes and pushes the piston 11 downward to do work. At the same time, the crankshaft and the pistons 11 of other cylinders enter the motion state and perform their respective working strokes. When the piston 11 of this cylinder moves downward to the bottom dead center under the action of compressed air, the solenoid valve closes the intake and ends the compression stroke. At the same time, the high-pressure closed normally open one-way exhaust valve 14 loses pressure and returns to the normally open position.
[0084] S2. When this cylinder finishes its compression stroke, it enters the exhaust stroke. At this time, the engine's own exhaust valve opens, and the piston 11 moves upward to discharge the remaining gas in the cylinder into the exhaust manifold 2 chamber.
[0085] S3. After the cylinder finishes its exhaust stroke, the exhaust valve 4 closes, and the piston 11 moves upward to the top dead center of the intake stroke. The intake valve opens, and the engine controller sends a cleaning signal. The main control solenoid valve 13 and the liquid injection solenoid valve 12 open simultaneously. The incoming cleaning fluid (or dry ice) and compressed air mix to form a two-fluid compressed air, which is injected into the cylinder. When the compressed air enters the injection pipe 27, the injection pipe 27 is pressurized and overcomes the elastic body pressure to be pushed into the cylinder to the first contact surface 21-2. Due to the eccentric reaction force of the side injection port 27-1, the injection pipe 27 is pushed to rotate in the opposite direction by a certain angle. Under the force of the arc-shaped contact surface 27-2 at the head of the injection pipe 27, the compressed air is sprayed in a fan shape towards the top 7 of the combustion chamber at the rear. At the same time, the two-fluid or compressed air is sprayed in a fan shape towards the top 7 of the combustion chamber through the eccentric diffusion channel of the injection pipe 27. After washing away the carbon deposits, they are rebounded to the cylinder wall 8 and piston 1 in the combustion chamber 9. At the bottom of cylinder 1, the cylinder wall 8 and piston top 6 are flushed. Pressure penetrates into the gap between piston 11 and cylinder wall. The cleaning agent soaks and dissolves the carbon deposits in piston ring 10 and piston ring 10 groove. The dissolved deposits are pushed to the top of cylinder and crankcase by piston ring 10 when piston 11 moves up and down. During the intake stroke, the two fluids sprayed generate a vortex airflow that pushes the cleaned carbon deposits through the open intake valve of combustion chamber 9 into intake manifold chamber 3-1, where they are collected by a vacuum cleaner. Before piston 11 of this cylinder reaches bottom dead center, main control solenoid valve 13 and liquid injection solenoid valve 12 close simultaneously, stopping the injection of two fluids compressed air into combustion chamber 9. Subsequently, the high-pressure closed normally open one-way exhaust valve 14 loses high pressure, and valve core 14-3 is opened by the elastic body. Combustion chamber 9 is in an open state with the outside. The intake valve of combustion chamber 9 itself also closes, ending the intake stroke and entering the compression stroke.
[0086] S4. When this cylinder enters the compression stroke, the piston 11 moves upward, and the residual gas in the cylinder is compressed upward by the piston 11. It is discharged to the outside of the combustion chamber 9 through the normally open one-way exhaust valve 14, which is opened by the high pressure.
[0087] S5. All cylinders of the engine follow the above four processes for continuous cyclic cleaning to complete the cleaning requirements of the combustion chamber 9 designed in this application; if a cleaning fluid containing piston ring 10 release agent is selected, the oil burning phenomenon caused by piston ring 10 sticking due to carbon deposits can be completely eliminated.
[0088] Specifically, regarding step S3, the following should be noted:
[0089] (1) A guide chamber 21-1 connected to the valve seat 28 is formed in the guide pipe 12, and a jet chamber 27-3 connected to the guide chamber 21-1 and the side jet port 27-1 is formed in the jet pipe 27. Compressed air can pass through the guide chamber 21-1 and the jet chamber 27-3 in sequence and be ejected outward from the side jet port 27-1. When the compressed air enters the jet chamber 27-3, it first contacts the jet chamber 27-3. Due to the obstruction of the jet chamber 27-3, the compressed air will be ejected outward from the side jet port 27-1 on the jet pipe 27. The jet chamber 27-3 is perpendicular to the guide direction, and the force point of the compressed air when it contacts the jet chamber 27-3 is more concentrated, so that the flow rate of the compressed air discharged through multiple side jet ports 27-1 is consistent.
[0090] (2) An elastic element 26 is provided between the outer shell 25 of the injection pipe and the injection pipe 27. After the compressed air enters the guide chamber, it pushes the injection pipe 27 to move along the direction of the injection pipe 27 chamber. When the compressed air stops being ejected, the injection pipe 27 returns to the first contact surface 21-2 under the action of the elastic body return thrust. After the compressed air enters the injection chamber 27-3 from the guide chamber 21-1, it will be blocked by the arc-shaped contact surface 27-2, which will apply a force to the injection chamber 27-3 in the direction of flow, thereby causing the elastic element 26 located between the injection pipe 27 and the guide to deform. The injection pipe 27 will move in the direction of flow. When the compressed air stops being discharged, the injection chamber 27-3 is not subjected to the force in the direction of flow, and the elastic element 26 returns to its initial state. This setting can prevent the piston 11 from colliding with the injection pipe 27 when it moves upward.
[0091] (3) When the side injection port 27-1 is injecting gas and when the injection stops, at least half of the injection port is located in the combustion chamber 9 space to facilitate the discharge of residual gas during the compression stroke.
[0092] (4) When compressed air is ejected outward from the side injection port 27-1, the guide slope causes the injection pipe 27 to rotate at a preset angle. The preset angle is determined by the pressure and flow rate of the compressed air entering the injection chamber 27-3, and the preferred preset angle is 15-30°. After the injection pipe 27 rotates at the preset angle, the fan-shaped area of the compressed air ejected outward from the injection pipe 27 intersects with the fan-shaped area of the compressed air ejected outward from the injection pipe 27 before the injection pipe 27 rotates at the preset angle. When cleaning the inside of the cylinder, the compressed air is ejected after rotation. The compressed air fan-shaped area overlaps with the fan-shaped area of the compressed air injected before rotation for secondary cleaning, ensuring its cleanliness after cleaning. The carbon residue cleaned in the combustion chamber 9 is discharged through the intake valve with the vortex airflow, and also cleans the back of the intake valve and the intake manifold 3. When the side injection port 27-1 rotates to the valve position, the compressed air powerfully flushes the front and back of the open valve and the intake chamber. The vacuum cleaner connected to the outside of the intake chamber sucks out the cleaned carbon residue.
[0093] (5) When cleaning using the manual mode of this application, the intake valve or exhaust valve 4 must always be in the open state. The above process is repeated continuously by manual spot spraying to achieve an effect similar to automatic continuous cleaning.
[0094] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.
Claims
1. A pulse rotary cleaning device for cleaning carbon deposits inside cylinders, characterized in that, The device includes a valve seat and a pulse rotary cleaning assembly. The valve seat is used to combine or connect a solenoid valve assembly. The pulse rotary cleaning assembly is connected to an external liquid storage tank assembly via the valve seat. The solenoid valve assembly controls the external liquid storage tank assembly to inject compressed air into the cylinder through the valve seat and the pulse rotary cleaning assembly. The pulse rotary cleaning assembly includes a guide pipe connected to the outlet end of the valve seat. The outlet end of the guide pipe is connected to a spray pipe housing. The spray pipe is movably disposed within the spray pipe housing. One end of the spray pipe extending out of the spray pipe housing is the spray pipe head. One or more eccentric side spray ports are provided on the side of the spray pipe head. A receiving surface is provided on the inner bottom surface of the spray pipe head. When the compressed air entering the spray pipe impacts the receiving surface, the rebound effect of the receiving surface causes the entering compressed air to be sprayed in a rearward direction, forming an eccentric guide cavity with its eccentric side spray ports, thereby causing the spray pipe to rotate relative to the nozzle housing.
2. The pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The side injection port is a 1-shaped side injection port; the compressed air passing through the side injection port is ejected outward in the form of a fan-shaped surface, and at the same time, the fan-shaped surface formed by the next injection from the side injection port overlaps with a part of the previous fan-shaped surface.
3. The pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The side spray nozzle is provided with a fan-shaped groove wall on the side away from the head of the spray pipe, so that the side spray nozzle forms a side spray nozzle with a fan-shaped cross section.
4. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 2, characterized in that, The receiving surface is an arc-shaped end face that is recessed towards the head of the injection pipe, and the receiving surface is a closed receiving surface.
5. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 3, characterized in that, The receiving surface is a semi-enclosed receiving surface, and a bottom spray nozzle in the shape of a "1" is provided at the center of the receiving surface.
6. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 5, characterized in that, The end of the bottom injection port is located below the side injection port.
7. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The upper part of the jet pipe shell is provided with an upper connecting cavity for the guide pipe, and the lower part is provided with a lower connecting cavity for the jet pipe. The lower connecting cavity is provided with a jet pipe movable cavity and an elastomer mounting cavity in sequence in the direction away from the upper connecting cavity. The end of the jet pipe near the guide pipe is provided with an abutment ring adapted to the jet pipe movable cavity. The end of the guide pipe that contacts the abutment ring forms a first abutment surface. The inner diameter of the elastomer mounting cavity is smaller than the inner diameter of the jet pipe movable cavity, so that the bottom surface of the elastomer mounting cavity forms a second abutment surface. The elastomer is installed between the elastomer mounting cavity and the abutment ring.
8. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The upper part of the injection pipe housing is provided with a two-way threaded locking nut. The inner side of the upper end of the two-way threaded locking nut is provided with a two-way thread that connects to the guide pipe, and the lower end is provided with an external thread that connects to the spark plug hole.
9. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The compressed air includes pure compressed air or a two-fluid mixture gas with added cleaning agents or solid particles.
10. A pulse rotary cleaning device for cleaning carbon deposits inside a cylinder according to claim 1, characterized in that, The solenoid valve assembly includes a liquid filling solenoid valve, a main control solenoid valve, and a high-pressure shut-off normally open one-way exhaust valve. The main control solenoid valve is connected to the engine control system of the cylinder to be cleaned to obtain the ignition signal of the engine cylinder. The main control solenoid valve is also connected to a negative pressure switch. The negative pressure switch is connected to a guide tube through a vacuum tube to obtain the negative pressure signal generated when the piston moves down in the cylinder to be cleaned. The valve seat is provided with a three-way connector on one side that communicates with the guide pipe, and an air outlet channel on the other side that communicates with the guide pipe. The valve seat is connected to an external air source pipe and an external cleaning liquid pipe through the three-way connector. The liquid adding solenoid valve is set on the external cleaning liquid pipe. The high-pressure closed normally open one-way exhaust valve is vertically set on the air outlet channel. The high-pressure shut-off normally open one-way exhaust valve includes a valve core seat. One end of the valve core seat near the exhaust channel is provided with a valve core blade covering the inlet of the high-pressure shut-off normally open one-way exhaust valve. The other end is in contact with a duckbill one-way valve through a valve core push rod. A fixed sleeve connected to the valve core seat is provided on the outside of the duckbill one-way valve. A corresponding snap ring is provided at the end of the fixed sleeve near the outlet of the duckbill one-way valve. The valve seat is provided with a movable channel for the valve core push rod to extend into. An end sleeve for pushing the duckbill one-way valve is provided at the end of the valve core push rod extending out of the movable channel. A return spring is sleeved on the part of the valve core push rod located from the movable channel to the valve core.