Diesel engine starting system and control method thereof

Abstract

The application discloses a diesel engine starting system and a control method thereof, and belongs to the technical field of diesel engines. The diesel engine starting system is arranged through an air path and a second valve body capable of switching a passage. When it is necessary to rotate the diesel engine, the second valve body is communicated with a second inlet side of a turbine part, so that the gas discharged from an outlet side of a transmission part can enter the turbine part, thereby achieving the purpose of rotating the diesel engine. When it is necessary to start the diesel engine, the second valve body is communicated with a second inlet side of a first valve body, so that the gas discharged from the outlet side of the transmission part can enter the first valve body, thereby opening a main air cavity of the first valve body, and the gas at a first inlet side of the first valve body can enter the turbine part through the main air cavity, thereby achieving the purpose of starting. The air path structure integrates the rotating system and the starting system of the diesel engine, reduces the complexity of the diesel engine, and reduces the number of parts of the diesel engine.

Description

Technical Field

[0001] This application relates to the field of diesel engine technology, and in particular to a diesel engine starting system and its control method. Background Technology

[0002] A diesel engine consists of an engine block, cylinder liners, oil pan, cylinder head, pistons, connecting rods, flywheel, crankshaft, and transmission components. Diesel engines have independent starting and turning gear systems, resulting in a large number of parts and a relatively complex structure. Summary of the Invention

[0003] This application provides a diesel engine starting system to solve the technical problem of a large number of diesel engine parts.

[0004] To achieve the above objectives, according to a first aspect of this application, a diesel engine starting system is provided, comprising: A motor assembly, including a connected drive section and a turbine section; The first air circuit assembly includes an air source section and a first valve body. The outlet side of the air source section is connected to the inlet side of the transmission section, the first inlet side of the first valve body is connected to the outlet side of the air source section, and the outlet side of the first valve body is connected to the first inlet side of the turbine section. The second air passage assembly includes a second valve body, which is connected to the outlet side of the transmission unit, the second inlet side of the turbine unit, and the second inlet side of the first valve body, respectively. The diesel engine starting system has a turning state and a starting state. In the turning state, the second valve body is configured to be energized and connect the outlet side of the transmission unit to the second inlet side of the turbine unit. In the starting state, the second valve body is configured to be de-energized and connect the outlet side of the transmission unit to the second inlet side of the first valve body, so that the gas at the first inlet side of the first valve body is delivered to the turbine unit through the outlet side of the first valve body.

[0005] Optionally, the first gas path assembly further includes: The third valve body connects the outlet side of the gas source unit to the inlet side of the transmission unit.

[0006] Optionally, the second gas path assembly further includes: The fourth valve body connects the first outlet side of the second valve body to the second inlet side of the turbine section, and is used to regulate the air pressure in the turbine section.

[0007] Optionally, the diesel engine starting system further includes a flywheel assembly, the flywheel assembly including a flywheel portion, the flywheel portion being spaced apart on one side of the motor assembly; The motor assembly further includes a gear section connected to the transmission section, the transmission section being used to drive the gear section to move toward the flywheel section, so that the gear section meshes with the flywheel section; The second gas path assembly also includes a fifth valve body, the second outlet side of which is connected to the second inlet side of the first valve body via the fifth valve body.

[0008] Optionally, the motor assembly further includes: The first detection unit is electrically connected to the transmission unit and is used to detect the distance that the transmission unit drives the gear unit to move toward the flywheel unit.

[0009] Optionally, the flywheel assembly further includes: The second detection unit is electrically connected to the flywheel and is used to detect the rotational speed of the flywheel.

[0010] Optionally, the diesel engine starting system further includes a control component, which is electrically connected to the motor assembly, the first air circuit assembly, the second air circuit assembly, and the flywheel assembly, respectively.

[0011] Optionally, in the starting state, the air pressure in the first inlet side of the turbine is P1, and in the turning state, the air pressure in the second inlet side of the turbine is P2, satisfying: P1 > P2.

[0012] According to a second aspect of this application, a control method for a diesel engine starting system is provided, applied to the diesel engine starting system described in any one of the above-mentioned methods, the method comprising: Gas is supplied to the inlet side of the transmission unit through the gas source section in the first gas path assembly, and the gas is supplied to the second valve body through the outlet side of the transmission unit. Gas is supplied to the main gas chamber in the first valve body through the gas source section; When the second valve body is energized, it connects the outlet side of the transmission unit with the second inlet side of the turbine unit to allow gas to enter the turbine unit; when the second valve body is de-energized, it connects the outlet side of the transmission unit with the second inlet side of the first valve body to supply gas to the first valve body so that the gas in the main gas chamber enters the turbine unit.

[0013] Optionally, a fifth valve body is provided between the second outlet side of the second valve body and the second inlet side of the first valve body, wherein the second valve body is in the power-off state and the fifth valve body is closed; Gas is supplied to the inlet side of the transmission unit through the gas source unit, so that the transmission unit drives the gear unit to move toward the flywheel unit for meshing with the flywheel unit.

[0014] Optionally, the transmission unit is electrically connected to a first detection unit, which detects the distance by which the transmission unit drives the gear unit to move toward the flywheel unit. When the distance reaches a preset distance, the gear unit meshes with the flywheel unit, and the fifth valve body opens. When the distance does not reach the preset distance, the fifth valve body remains closed.

[0015] Optionally, a third valve body is connected between the outlet side of the air source unit and the inlet side of the transmission unit. When the third valve body is open, the transmission unit drives the gear unit to move toward the flywheel unit. When the third valve body is closed, the transmission unit drives the gear unit to reset.

[0016] Optionally, the flywheel is electrically connected to a second detection unit, which detects the rotational speed of the flywheel. When the rotational speed reaches a preset speed, the second valve body is de-energized, and the third and fifth valve bodies are closed.

[0017] The diesel engine starting system of this application embodiment includes: a motor assembly including a transmission section and a turbine section connected to each other; a first air passage assembly including an air source section and a first valve body, the outlet side of the air source section being connected to the inlet side of the transmission section, the first valve body having a main air chamber, the first inlet side of the first valve body being connected to the outlet side of the air source section, and the outlet side of the first valve body being connected to the first inlet side of the turbine section; a second air passage assembly including a second valve body, the second valve body being connected to the outlet side of the transmission section, the second inlet side of the turbine section, and the second inlet side of the first valve body respectively; the diesel engine starting system has a turning gear state and a starting state. In the turning gear state, the second valve body is configured to: the second valve body be energized and connect the outlet side of the transmission section to the second inlet side of the turbine section; in the starting state, the second valve body is configured to: the second valve body be de-energized and connect the outlet side of the transmission section to the second inlet side of the first valve body, so that the first inlet side of the first valve body is connected to the outlet side of the first valve body. By arranging the air passages and using a second valve body that can switch pathways, the second valve body can be connected to the second inlet side of the turbine unit when turning the engine is required, allowing the gas discharged from the outlet side of the transmission unit to enter the turbine unit for turning. When starting the diesel engine, the second valve body can be connected to the second inlet side of the first valve body, allowing the gas discharged from the outlet side of the transmission unit to enter the first valve body, thereby opening the main air chamber of the first valve body. This allows the gas at the first inlet side of the first valve body to enter the turbine unit through the main air chamber for starting. This air passage structure integrates the turning and starting systems of the diesel engine, reducing the complexity of the diesel engine and the number of diesel engine parts.

[0018] The control method for the diesel engine starting system in this embodiment can be applied to the diesel engine starting system described above. The method includes: supplying gas to the inlet side of the transmission unit through the gas source section in the first air circuit assembly, and supplying the gas to the second valve body through the outlet side of the transmission unit; supplying gas to the main air chamber in the first valve body through the gas source section; when the second valve body is energized, the second valve body connects the outlet side of the transmission unit to the second inlet side of the turbine unit to allow gas to enter the turbine unit; when the second valve body is de-energized, the second valve body connects the outlet side of the transmission unit to the second inlet side of the first valve body to supply gas to the first valve body, allowing the gas in the main air chamber to enter the turbine unit. By switching the second valve body between energized and de-energized states, the starting system can be switched in real time between the turning gear state and the starting state, increasing the flexibility of the starting system control. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a schematic diagram of the connection between the motor assembly, the first air passage assembly, and the second air passage assembly provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of the second air passage assembly provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of the first air passage assembly provided in an exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of the motor assembly, the first air passage assembly, the second air passage assembly, and the flywheel assembly provided in an exemplary embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a diesel engine starting system provided in an exemplary embodiment of this disclosure; Figure 6 This is a schematic diagram of the structure of the transmission unit provided in an exemplary embodiment of this disclosure; Figure 7 This is a flowchart of a control method for a diesel engine starting system provided in an exemplary embodiment of this disclosure.

[0022] Explanation of reference numerals in the attached figures: 10-Motor assembly; 11-Transmission unit; 111-Transmission chamber; 112-Piston; 12-Turbine unit; 13-Gear unit; 14-First detection unit; 20-First air path assembly; 21-Air source unit; 22-First valve body; 221-Main air chamber; 222-Pilot chamber; 23-Third valve body; 30-Second air path assembly; 31-Second valve body; 32-Fourth valve body; 33-Fifth valve body; 40-Flywheel assembly; 41-Flywheel unit; 42-Second detection unit; 50-Control assembly. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0024] Diesel engines generally have two starting methods: electric starting and pneumatic starting. Electric starting is generally suitable for small-bore, low-displacement diesel engines, while large-bore diesel engines generally use pneumatic starting. Currently, pneumatic starting methods for diesel engines are mainly divided into two types: air distributor and starter motor. In comparison, pneumatic motors have a simpler structure, are easier to arrange, and are less difficult to disassemble and maintain, therefore, pneumatic motors are preferred for diesel engines. Pneumatic motors come in two types: gear pump type and turbine blade type. To reduce the requirements for the cleanliness of the external compressed air system, turbine blade type pneumatic motors (hereinafter referred to as turbine type) are generally preferred. Currently, turbine type pneumatic motors all adopt a pre-engaged working mode. This working mode is generally achieved through the helical spline angle on the output shaft inside the motor and the air circuit matching design, but there is a risk that the pre-engaged state of the gears cannot be sensed and controlled in real time.

[0025] In current diesel engines, the starting system only integrates engine blowing and starting functions, not turning gear functionality. That is, the turning gear function is not achieved by a pneumatic motor driving the diesel engine, but rather by a separate turning gear component. The turning gear is typically fixed to the turning mechanism by a bracket, which is usually not integrated with the pneumatic motor mounting bracket. Instead, they are located on opposite sides of the diesel engine, requiring corresponding bolt mounting holes to be machined into the engine block. This not only increases the number of diesel engine components and the difficulty of manufacturing, but also increases the complexity of the system.

[0026] Please see Figure 1 , Figure 2 and Figure 3 This application provides a diesel engine starting system, including a motor assembly 10, a first air passage assembly 20, and a second air passage assembly 30.

[0027] The motor assembly 10 includes a transmission section 11 and a turbine section 12 connected to each other. The first air passage assembly 20 includes an air source section 21 and a first valve body 22. The outlet side of the air source section 21 is connected to the inlet side of the transmission section 11. The first valve body 22 has a main air chamber 221 and a pilot chamber 222. The first inlet side of the first valve body 22 is connected to the outlet side of the air source section 21, and the outlet side of the first valve body 22 is connected to the first inlet side of the turbine section 12. The second air passage assembly 30 includes a second valve body 31, which is connected to the outlet side of the transmission section 11, the second inlet side of the turbine section 12, and the second inlet side of the first valve body 22. The diesel engine starting system has a turning gear state and a starting state. In the turning gear state, the second valve body 31 is configured to be energized and connect the outlet side of the transmission unit 11 to the second inlet side of the turbine unit 12. In the starting state, the second valve body 31 is configured to be de-energized and connect the outlet side of the transmission unit 11 to the second inlet side of the first valve body 22, so that the gas at the first inlet side of the first valve body 22 is delivered to the turbine unit 12 through the outlet side of the first valve body 22. Figure 1 As shown, A represents the inlet side of the transmission section 11, B represents the outlet side of the transmission section 11, C represents the first inlet side of the turbine section 12, and D represents the second inlet side of the turbine section 12.

[0028] Understandably, the turbine 12 on the motor assembly 10 can drive the transmission 11 to rotate, so that the motor assembly 10 enters a turning gear state or a starting state. To make the turbine 12 rotate, compressed gas can be supplied to the turbine 12 through the cooperation of the first air passage assembly 20 and the second air passage assembly 30, and the compressed gas drives the turbine 12. The air source 21 in the first air passage assembly 20 is an air cylinder that can continuously output compressed gas. The first inlet side of the first valve body 22 is connected to the outlet side of the air source 21 through a pipeline. The first valve body 22 is the main starting valve, and it has a main air chamber 221 inside. The air source 21 supplies gas to the first inlet side of the first valve body 22 through the pipeline. At this time, the passage between the first inlet side of the first valve body 22 and the main air chamber 221 is not open, and the compressed gas at the first inlet side of the first valve body 22 cannot be supplied to the outlet side of the first valve body 22 through the main air chamber 221, and therefore cannot enter the turbine 12. The outlet side of the air source unit 21 is also connected to the inlet side A of the transmission unit 11 through a pipeline, so that the air source unit 21 can supply compressed air to the transmission unit 11, enabling the transmission unit 11 to work.

[0029] Meanwhile, since the outlet side B of the transmission unit 11 is connected to the inlet side of the second valve body 31 through a pipe, the compressed air in the transmission unit 11 can be delivered to the second valve body 31. The second valve body 31 is a two-position five-way solenoid valve, which can control the movement of the valve core by energizing and de-energizing the solenoid coil, thereby switching the air passage. The second valve body 31 has two outlet sides, one of which is connected to the second inlet side D of the turbine unit 12 through a pipe, and the other outlet side is connected to the second inlet side of the first valve body 22 through a pipe. When the second valve body 31 is energized, the solenoid coil inside the valve body is energized, so that one outlet side of the second valve body 31 is connected to the second inlet side D of the turbine unit 12 through the pipe, and the other outlet side is closed. Then, the compressed gas in the second valve body 31 can enter the turbine unit 12 through the second inlet side D of the turbine unit 12, driving the turbine unit 12. The turbine unit 12 can then drive the transmission unit 11 to rotate, so that the diesel engine starting system is in a turning gear state. When the second valve body 31 is de-energized, the electromagnetic coil inside the valve body is de-energized, causing one outlet side of the second valve body 31 to be closed, while the other outlet side is connected to the second inlet side of the first valve body 22 via a pipe. The compressed gas in the second valve body 31 can then enter the pilot chamber 222 through the second inlet side of the first valve body 22. The compressed gas in the pilot chamber 222 can compress the main valve core. When this pressure exceeds the spring force of the return spring, it will push the main valve core to move, disengaging it from the valve seat of the main air chamber 221. The compressed gas at the first inlet side of the first valve body 22 then passes through the main air chamber 221, entering the turbine section 12 from the outlet side of the first valve body 22 and the first inlet side C of the turbine section 12, driving the turbine section 12. The turbine section 12 then drives the transmission section 11 to rotate, thus starting the diesel engine starting system.

[0030] This structure integrates the turning gear function into the diesel engine starting system, enabling real-time switching between the turning gear and starting functions. This eliminates the need for operators to set up a separate turning gear system, reducing their workload, decreasing the number of diesel engine parts, simplifying the structure, and lowering the processing difficulty and system complexity of the diesel engine.

[0031] Please see Figure 1 and Figure 3 In conjunction with the above embodiments, in some embodiments, the first air circuit assembly 20 further includes a third valve body 23, and the outlet side of the air source section 21 is connected to the inlet side of the transmission section 11 through the third valve body 23.

[0032] It is understood that the third valve body 23 is connected between the outlet side of the air source section 21 and the inlet side A of the transmission section 11. That is, the outlet side of the air source section 21 is connected to the inlet side of the third valve body 23 via a pipe, and the outlet side of the third valve body 23 is connected to the inlet side A of the transmission section 11 via a pipe. Thus, the third valve body 23 controls the flow of compressed gas between the air source section 21 and the transmission section 11. When the transmission section 11 is not required to operate, the third valve body 23 can be closed, thereby putting the entire diesel engine starting system in a non-operating state. The third valve body 23 can be a two-position three-way solenoid valve.

[0033] Please see Figure 1 and Figure 2 In conjunction with the above embodiments, in some embodiments, the second air passage assembly 30 further includes a fourth valve body 32, the first outlet side of the second valve body 31 is connected to the second inlet side of the turbine section 12 through the fourth valve body 32, for adjusting the air pressure in the turbine section 12.

[0034] Understandably, the fourth valve body 32 is positioned between the first outlet side of the second valve body 31 and the second inlet side D of the turbine section 12. That is, the first outlet side of the second valve body 31 is connected to the inlet side of the fourth valve body 32 via a pipe, and the outlet side of the fourth valve body 32 is connected to the second inlet side D of the turbine section 12 via a pipe. During the turning gear operation of the diesel engine starting system, the compressed gas output from the first outlet side of the second valve body 31 enters the turbine section 12 through the fourth valve body 32. The fourth valve body 32 is a one-way electric pressure regulating valve equipped with a pressure sensor. This sensor detects the pressure of the compressed gas passing through the fourth valve body 32, thereby obtaining the pressure of the compressed gas in the turbine section 12. The pressure of the gas passing through the fourth valve body 32 can be adjusted to ensure that the pressure in the turbine section 12 meets the turning gear requirements. When the diesel engine starting system is in the turning gear state, the one-way electric pressure regulating valve is initially in the zero position, that is, in the closed state. Its closed and open states are controlled by the central control box. The central control box, together with the input turning gear speed command, speed signal, and pressure signal emitted by the pressure sensor on the one-way electric pressure regulating valve, coordinates the opening and closing of the one-way electric pressure regulating valve.

[0035] Please see Figure 4 and Figure 6In conjunction with the above embodiments, in some embodiments, the diesel engine starting system further includes a flywheel assembly 40, which includes a flywheel portion 41, spaced apart on one side of the motor assembly 10. The motor assembly 10 also includes a gear portion 13, which is connected to a transmission portion 11. The transmission portion 11 drives the gear portion 13 to move toward the flywheel portion 41, so that the gear portion 13 meshes with the flywheel portion 41. The second air passage assembly 30 also includes a fifth valve body 33, and the second outlet side of the second valve body 31 is connected to the second inlet side of the first valve body 22 through the fifth valve body 33.

[0036] It is understandable that a gear section 13 is also connected to one end of the transmission section 11. The transmission section 11 can drive the gear section 13 to move towards the flywheel section 41, so that the gear section 13 can mesh with the flywheel section 41. For example, Figure 6 As shown, the transmission unit 11 has a transmission cavity 111. Compressed gas from the inlet side A of the transmission unit 11 enters the transmission cavity 111 and pushes the piston 112 in the transmission cavity 111, thereby causing the piston 112 to drive the gear unit 13 to move in the same direction, realizing the meshing of the gear unit 13 and the flywheel unit 41.

[0037] The fifth valve body 33 is located between the second outlet side of the second valve body 31 and the second inlet side of the first valve body 22. That is, the second outlet side of the second valve body 31 is connected to the inlet side of the fifth valve body 33 via a pipeline, and the outlet side of the fifth valve body 33 is connected to the second inlet side of the first valve body 22 via a pipeline. When the second valve body 31 is de-energized, the inlet side and the second outlet side of the second valve body 31 are connected, allowing the high-pressure gas input from the inlet side of the second valve body 31 to be output through the second outlet side. At this time, the fifth valve body 33 can be closed, causing the compressed gas to remain at the inlet side of the fifth valve body 33, preventing compressed gas from entering the turbine section 12 and starting the diesel engine. Meanwhile, the air source section 21 continues to supply compressed gas to the inlet side A of the transmission section 11. The compressed gas pushes the piston 112 inside the transmission chamber 111, causing the piston 112 to drive the gear section 13 to move in the same direction until the gear section 13 meshes with the flywheel section 41.

[0038] This structure allows for pre-engagement of the gear section 13 and flywheel section 41 in both non-rotating and starting states. This engagement process is convenient and simple, and the turbine section 12 does not drive the transmission section 11 and gear section 13 to rotate, ensuring high safety during engagement. After full engagement, the fifth valve body 33 is opened, allowing compressed gas to enter the pilot chamber 222 of the first valve body 22. This opens the main air chamber 221 of the first valve body 22, allowing the compressed gas remaining at the first inlet side of the first valve body 22 to pass through the main air chamber 221 to the outlet side of the first valve body 22, and then from the outlet side to the turbine section 12, enabling the turbine section 12 to drive the transmission section 11 and gear section 13 to rotate.

[0039] Please see Figure 4 In conjunction with the above embodiments, in some embodiments, the motor assembly 10 further includes a first detection unit 14, which is electrically connected to the transmission unit 11 and is used to detect the distance that the transmission unit 11 drives the gear unit 13 to move toward the flywheel unit 41.

[0040] Understandably, the first detection unit 14 can be mounted on the output shaft housing of the motor assembly 10 via a threaded connection or other means, and is connected to the transmission unit 11 via an electrical signal. The first detection unit 14 is a position sensor. During the engagement of the gear unit 13 and the flywheel unit 41, the first detection unit 14 can detect the movement distance of the piston 112 in the transmission unit 11, thereby detecting the movement distance of the gear unit 13 toward the flywheel unit 41. If the distance that the gear unit 13 needs to move to engage with the flywheel unit 41 before it moves is L, then when the distance that the piston 112 drives the gear unit 13 to move reaches L, it indicates that the gear unit 13 and the flywheel unit 41 have completed engagement, the fifth valve body 33 opens, and the diesel engine enters the starting state, or the diesel engine is turned; if the detected movement distance of the gear unit 13 does not reach L, the fifth valve body 33 remains closed, or in other words, the diesel engine will not enter the starting state or the turning state.

[0041] Please see Figure 4 In conjunction with the above embodiments, in some embodiments, the flywheel assembly 40 further includes a second detection unit 42, which is electrically connected to the flywheel assembly 41 and is used to detect the rotational speed of the flywheel assembly 41.

[0042] Understandably, the second detection unit 42 can be a speed sensor, which can be fixed to the diesel engine by a bracket and is connected to the flywheel unit 41 via an electrical signal. When the flywheel unit 41 engages with the gear unit 13, the diesel engine starting system can enter the turning gear state or the starting state. At this time, the turbine unit 12 can drive the flywheel unit 41 to rotate through the gear unit 13. The second detection unit 42 can detect the speed of the rotating flywheel unit 41 to ensure that the speed of the flywheel unit 41 is within a suitable range in the turning gear state and the starting state.

[0043] Please see Figure 5 In conjunction with the above embodiments, in some embodiments, the diesel engine starting system further includes a control component 50, which is electrically connected to the motor assembly 10, the first air circuit assembly 20, the second air circuit assembly 30, and the flywheel assembly 40, respectively.

[0044] Understandably, a control component 50 is also provided in the diesel engine starting system. This control component 50 can be a central control box, which can be electrically connected to the first detection unit 14 in the motor assembly 10, the third valve body 23 in the first air passage assembly 20, the second valve body 31, the fourth valve body 32, and the fifth valve body 33 in the second air passage assembly 30, and the second detection unit 42 in the flywheel assembly 40. The control component 50 can control the state of the corresponding valves and process the feedback results from the detection units to adjust the system's operating state. Figure 5 The solid lines represent air passages, and the dashed lines represent electrical signal harnesses.

[0045] Based on the above structure, the diesel engine starting system has five operating states: non-operating state, pre-engagement state, turning gear state, turning gear to start switching state, and start-end state. The control methods for each state are as follows: Non-operating state: In this state, the control component 50 will not issue cranking or start commands. The third valve body 23 is de-energized, and the compressed gas in the air source section 21 cannot enter the transmission section 11 through the third valve body 23. Consequently, the piston 112 in the transmission section 11 cannot be pushed, and the piston 112 cannot drive the gear section 13 to move towards the flywheel section 41. At the same time, the main air chamber 221 in the first valve body 22 will not open, and no compressed gas enters the turbine section 12 to perform work, so the diesel engine cannot start.

[0046] Pre-engaged state: The control component 50 can issue a turning or start command, the third valve body 23 is energized, and the compressed gas in the air source section 21 can enter the transmission chamber 111 of the transmission section 11 through the third valve body 23, pushing the piston 112 in the transmission section 11 to move, thereby pushing the gear section 13 to move toward the flywheel section 41. At this time, the first detection unit 14 can detect the displacement of the piston 112 or the spring seat in the transmission unit 11. When the displacement distance does not reach the distance L required for the gear unit 13 and the flywheel unit 41 to mesh, the second valve body 31 and the fifth valve body 33 are in a de-energized state. The compressed gas at the outlet side B of the transmission unit 11 will enter the inlet side of the fifth valve body 33 through the second valve body 31 and wait. The fifth valve body 33 will not open, and the compressed gas will not enter the pilot chamber 222 of the first valve body 22. Therefore, the main air chamber 221 of the first valve body 22 will not open. The compressed gas at the first inlet side of the first valve body 22 cannot enter the turbine unit 12 through the main air chamber 221 and the outlet side of the first valve body 22 to do work. The motor assembly 10 cannot drive the diesel engine to move. When the displacement distance of the piston 112 or the spring seat in the transmission part 11 reaches the distance L required for the gear part 13 and the flywheel part 41 to mesh, the gear part 13 and the flywheel part 41 are engaged, and the states of the second valve body 31 and the fifth valve body 33 will change further, so that the diesel engine starting system enters the turning state or the starting state.

[0047] Turning gear state: When the control component 50 issues a turning gear command, and the gear section 13 and flywheel section 41 are in a pre-engaged state, the second valve body 31 is energized while the fifth valve body 33 remains de-energized. Compressed gas from the outlet side B of the transmission section 11 enters the fourth valve body 32 through the second valve body 31, and then enters the turbine section 12 to perform work, causing the gear section 13 to drive the flywheel section 41 to rotate. The second detection unit 42 detects the rotation of the flywheel section 41, causing the diesel engine to enter the turning gear state. At this time, the injection unit in the diesel engine will not inject fuel into the combustion chamber, and the diesel engine will not ignite. During this process, the gas in the pipeline between the second valve body 31 and the fifth valve body 33 will be discharged through the second valve body 31, preventing pressure buildup in the pipeline. Furthermore, a pressure sensor is installed on the fourth valve body 32, which can monitor in real time the pressure of the compressed gas entering the turbine section 12 through the second inlet side D to perform work. This pressure value is fed back to the control component 50. The control component 50 is equipped with a processing module that adapts the compressed gas pressure to the turning speed. It can automatically adjust the fourth valve body 32 as needed, adjusting the pressure and flow rate of the compressed gas entering the turbine section 12 to perform work, thereby enabling the gear section 13 and flywheel section 41 to reach the set turning speed. At the same time, during the above process, once the compressed gas enters the turbine section 12 to perform work, but the second detection unit 42 does not detect the flywheel section 41 rotating within a certain period of time, the third valve body 23 and the second valve body 31 will immediately lose power, ending the turning command. The control component 50 will then issue an alarm command to notify the personnel to check the diesel engine status to prevent malfunctions.

[0048] Turning gear to start-up switching state: After the control component 50 switches from turning gear command to start-up command, based on the turning gear state, the third valve body 23 and the fifth valve body 33 are energized, and the second valve body 31 is de-energized. The compressed gas at the outlet side B of the transmission unit 11 enters the inlet side of the fifth valve body 33 after passing through the second valve body 31. At this time, the fifth valve body 33 is in the open state, and the compressed gas will enter the pilot chamber 222 of the first valve body 22 through the fifth valve body 33, squeezing the main valve core of the first valve body 22. When the pressure is greater than the spring force of the return spring, it will push the main valve core to move and disengage from the valve seat of the main air chamber 221. The compressed gas at the first inlet side of the first valve body 22 will then pass through the main air chamber 221, from the outlet side of the first valve body 22 and the first inlet side C of the turbine unit 12, and enter the turbine unit 12 to do work, thereby causing the gear unit 13 to drive the diesel engine to run at high speed. At the same time, the injection unit will inject fuel into the combustion chamber to enable the diesel engine to automatically ignite and run. In this state, gas in the pipeline between the second valve body 31 and the fourth valve body 32 can be discharged through the second valve body 31 without causing internal pressure buildup in the pipeline. The fourth valve body 32 is a one-way electric pressure regulating valve, preventing a large amount of compressed gas in the turbine section 12 from flowing back into the second valve body 31 through the fourth valve body 32. The pressure sensor installed on the fourth valve body 32 can monitor the pressure of the compressed gas in the main air path of the turbine section 12 in real time and feed it back to the control component 50 to determine the operating status of the starting system, thus providing a pre-alarm function and protecting the starting system.

[0049] Start-up termination state: When the diesel engine is in the start-up state, the second detection unit 42 will monitor the speed of the flywheel 41 in real time. When the speed reaches the ignition speed, the control component 50 will issue a start-up termination command. The third valve body 23, the second valve body 31 and the fifth valve body 33 will all lose power. Compressed gas can no longer enter the inlet side A of the transmission unit 11 through the third valve body 23. All pipelines will lose their gas supply. The gas inside the pipeline between the fifth valve body 33 and the second valve body 31, the gas inside the pipeline between the outlet side B of the transmission unit 11 and the second valve body 31, the gas inside the transmission unit 11, and the gas inside the pipeline between the inlet side A of the transmission unit 11 and the third valve body 23 will all be quickly discharged through the third valve body 23. The gas inside the pipeline between the fifth valve body 33 and the first valve body 22, and the gas inside the pilot chamber 222 of the first valve body 22 will all be discharged through the fifth valve body 33. The gas inside the pipeline between the fourth valve body 32 and the second valve body 31 will be discharged through the second valve body 31. At the same time, the reset spring in the first valve body 22 will close the main air chamber 221, and the turbine 12 will lose its air source and become free to rotate. Due to the internal frictional resistance, it will gradually stop rotating. In addition, the spring in the transmission part 11 will also cause the gear part 13 to disengage, and the starting process ends.

[0050] In the diesel engine starting system, the movement distance of the piston 112 or spring seat within the transmission unit 11 can be detected using a position sensor, or by further modifying the internal structure of the motor assembly 10 to indirectly or amplify the measurement of the piston 112 or spring seat movement distance through mechanical structural design. Meanwhile, the one-way electric pressure regulating valve can be an integrated design or a combination of an electric pressure regulating valve and a separate one-way pressure limiting valve. Furthermore, the connection method between valve bodies can be an air pipe assembly or an integrated design.

[0051] This application, through its air circuit structure, effectively integrates the starting and turning functions of the diesel engine while maintaining the basic structure of the motor assembly 10. This reduces the number of parts on the diesel engine and lowers the complexity of the system. At the same time, the diesel engine starting system can switch between turning and starting states in real time, increasing the flexibility of the starting system control. It can be applied to engines for special purposes, such as emergency diesel generator sets or engines using special fuels such as methanol or ammonia, where there is a need for real-time switching from slow turning (purge pipeline) to diesel engine starting.

[0052] Furthermore, while keeping the reduction gear and turbine 12 on the motor assembly 10 unchanged, only the transmission 11 is slightly modified. By measuring the displacement distance of the internal structure such as the piston 112 or spring seat, the meshing state of the gear 13 and flywheel 41 is detected. The control commands of the control assembly 50 effectively protect the gear 13 and flywheel 41. The displacement distance of the internal structure such as the piston 112 or spring seat in the transmission 11 is effectively converted into a judgment command and combined with the control system. This detection method is applicable to most compressed air turbine starter motors and has universality.

[0053] Meanwhile, through the processing module inside the control component 50 that adapts the compressed gas pressure to the turning speed, the working capacity of the turbine section 12 can be effectively controlled, thereby achieving effective adjustment of the turbine section 12 speed in the turning state. At the same time, the system can confirm the turning state of the diesel engine, that is, whether the turning can be performed, which can further improve the reliability of the diesel engine operation. It can also monitor the pressure of the compressed air entering the main air passage of the turbine section 12 in real time through the fourth valve body 32 and feed it back to the control component 50 to determine the working status of the starting system, thereby providing a pre-warning state and protecting the starting system.

[0054] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, in the starting state, the air pressure in the first inlet side C of the turbine section 12 is P1, and in the turning state, the air pressure in the second inlet side D of the turbine section 12 is P2, satisfying: P1 > P2.

[0055] Understandably, during the starting state of the diesel engine starting system, the air source section 21 directly supplies compressed gas to the turbine section 12 through the first valve body 22. This compressed gas experiences minimal loss during delivery and has a higher pressure. Furthermore, the gear section 13 requires a higher rotational speed during the starting state. During the turning gear operation, the air source section 21 supplies compressed gas to the transmission section 11 through the third valve body 23 to drive the piston 112 in the transmission section 11. The transmission section 11 then supplies compressed gas to the turbine section 12 through the second valve body 31 and the fourth valve body 32. This compressed gas experiences greater loss during delivery and has a lower pressure. Additionally, the gear section 13 requires a lower rotational speed during the turning gear operation. Therefore, the gas pressure at the first inlet side C of the turbine section 12 is greater during the starting state than the gas pressure at the second inlet side D of the turbine section 12 during the turning gear operation.

[0056] Please see Figure 7 This application also provides a control method for a diesel engine starting system, applied to the diesel engine starting system described above. The method includes the following steps: S11: Compressed gas is supplied to the inlet side of the transmission unit 11 through the gas source section 21 in the first gas path assembly 20, and the compressed gas is supplied to the second valve body 31 through the outlet side of the transmission unit 11.

[0057] S12: Compressed gas is supplied to the first inlet side of the first valve body 22 through the gas source section 21.

[0058] S13: When the second valve body 31 is energized, it connects the outlet side of the transmission section 11 with the second inlet side of the turbine section 12 to allow compressed gas to enter the turbine section 12; when the second valve body 31 is de-energized, it connects the outlet side of the transmission section 11 with the second inlet side of the first valve body 22 to allow compressed gas from the first inlet side of the first valve body 22 to enter the main air chamber 221 of the first valve body 22 and be delivered to the turbine section 12 through the outlet side of the first valve body 22.

[0059] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0061] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0062] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A diesel engine starting system, characterized in that, include: The motor assembly (10) includes a transmission part (11) and a turbine part (12) connected to each other. The first air circuit assembly (20) includes an air source section (21) and a first valve body (22). The outlet side of the air source section (21) is connected to the inlet side of the transmission section (11). The first inlet side of the first valve body (22) is connected to the outlet side of the air source section (21). The outlet side of the first valve body (22) is connected to the first inlet side of the turbine section (12). The second air passage assembly (30) includes a second valve body (31), which is connected to the outlet side of the transmission unit (11), the second inlet side of the turbine unit (12), and the second inlet side of the first valve body (22), respectively. The diesel engine starting system has a turning state and a starting state. In the turning state, the second valve body (31) is configured to be energized and connect the outlet side of the transmission unit (11) to the second inlet side of the turbine unit (12) to deliver gas to the turbine unit (12). In the starting state, the second valve body (31) is configured to be de-energized and connect the outlet side of the transmission unit (11) to the second inlet side of the first valve body (22) to deliver gas from the first inlet side of the first valve body (22) to the turbine unit (12) through the outlet side of the first valve body (22).

2. The diesel engine starting system according to claim 1, characterized in that, The first gas path assembly (20) further includes: The third valve body (23) is used to connect the outlet side of the air source unit (21) to the inlet side of the transmission unit (11).

3. The diesel engine starting system according to claim 1 or 2, characterized in that, The second gas path assembly (30) also includes: The fourth valve body (32) is connected to the second inlet side of the turbine section (12) via the first outlet side of the second valve body (31) and is used to regulate the air pressure in the turbine section (12).

4. The diesel engine starting system according to claim 1 or 2, characterized in that, The diesel engine starting system also includes a flywheel assembly (40), which includes a flywheel portion (41) that is spaced apart on one side of the motor assembly (10). The motor assembly (10) further includes a gear section (13) connected to the transmission section (11), the transmission section (11) driving the gear section (13) to move toward the flywheel section (41) so that the gear section (13) meshes with the flywheel section (41); The second gas path assembly (30) also includes a fifth valve body (33), and the second outlet side of the second valve body (31) is connected to the second inlet side of the first valve body (22) through the fifth valve body (33).

5. The diesel engine starting system according to claim 4, characterized in that, The motor assembly (10) also includes: The first detection unit (14) is electrically connected to the transmission unit (11) and is used to detect the distance that the transmission unit (11) drives the gear unit (13) to move toward the flywheel unit (41).

6. The diesel engine starting system according to claim 4, characterized in that, The flywheel assembly (40) also includes: The second detection unit (42) is electrically connected to the flywheel unit (41) and is used to detect the rotational speed of the flywheel unit (41).

7. The diesel engine starting system according to claim 4, characterized in that, The diesel engine starting system also includes a control component (50), which is electrically connected to the motor assembly (10), the first air passage assembly (20), the second air passage assembly (30), and the flywheel assembly (40).

8. The diesel engine starting system according to claim 1, characterized in that, In the starting state, the air pressure in the first inlet side of the turbine section (12) is P1, and in the turning state, the air pressure in the second inlet side of the turbine section (12) is P2, satisfying: P1 > P2.

9. A control method for a diesel engine starting system, characterized in that, The method, applied to a diesel engine starting system as described in any one of claims 1 to 8, comprises: Gas is supplied to the inlet side of the transmission unit (11) through the gas source unit (21) in the first gas path assembly (20), and the gas is supplied to the second valve body (31) through the outlet side of the transmission unit (11). Gas is supplied to the first inlet side of the first valve body (22) through the gas source section (21); When the second valve body (31) is energized, it connects the outlet side of the transmission part (11) with the second inlet side of the turbine part (12) so that gas enters the turbine part (12); when the second valve body (31) is de-energized, it connects the outlet side of the transmission part (11) with the second inlet side of the first valve body (22) so that gas from the first inlet side of the first valve body (22) enters the main gas chamber (221) of the first valve body (22) and is delivered to the turbine part (12) through the outlet side of the first valve body (22).

10. The control method for a diesel engine starting system according to claim 9, characterized in that, A fifth valve body (33) is provided between the second outlet side of the second valve body (31) and the second inlet side of the first valve body (22). The second valve body (31) is in the power-off state and closes the fifth valve body (33). Gas is supplied to the inlet side of the transmission unit (11) through the gas source unit (21) so that the transmission unit (11) drives the gear unit (13) to move toward the flywheel unit (41) for meshing with the flywheel unit (41).

11. The control method for a diesel engine starting system according to claim 10, characterized in that, The transmission unit (11) is electrically connected to a first detection unit (14). The first detection unit (14) detects the distance by which the transmission unit (11) drives the gear unit (13) to move toward the flywheel unit (41). When the distance reaches a preset distance, the gear unit (13) meshes with the flywheel unit (41) and the fifth valve body (33) opens. When the distance does not reach the preset distance, the fifth valve body (33) remains closed.

12. The control method for a diesel engine starting system according to claim 10, characterized in that, A third valve body (23) is connected between the outlet side of the air source unit (21) and the inlet side of the transmission unit (11). When the third valve body (23) is opened, the transmission unit (11) drives the gear unit (13) to move toward the flywheel unit (41). When the third valve body (23) is closed, the transmission unit (11) drives the gear unit (13) to reset.

13. The control method for a diesel engine starting system according to claim 12, characterized in that, The flywheel (41) is electrically connected to a second detection unit (42). The second detection unit (42) detects the rotational speed of the flywheel (41). When the rotational speed reaches a preset speed, the second valve body (31) is de-energized, and the third valve body (23) and the fifth valve body (33) are closed.

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