Diesel engine air supply automatic control system and marine diesel engine
By installing an automated control system on the diesel engine and using sensors and a PLC controller to achieve automatic air replenishment, the problem of insufficient air intake is solved, the reliability and operating performance of the diesel engine are improved, and ship safety is ensured.
Patent Information
- Application Number
- CN202520455367.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The existing diesel engine air replenishment method is affected by the operating habits of the crew, resulting in insufficient air intake during rapid acceleration, docking and undocking, etc., which leads to reduced performance or even accidents, affecting the life and safety of the diesel engine.
The automated control system, composed of pressure sensors, flow sensors, speed sensors, and a PLC controller, automatically replenishes air by controlling the pneumatic valve with a solenoid valve. Combined with indicator lights, flow meters, and control buttons, it ensures the automation and reliability of air replenishment.
It effectively solved the problem of insufficient air intake, improved the reliability and operating performance of diesel engines, reduced malfunctions caused by improper operation, and ensured ship safety.
Smart Images
Figure CN223621692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of auxiliary control technology for marine diesel engines, specifically to an automated control system for diesel engine air replenishment and a marine diesel engine. Background Technology
[0002] In diesel engine design, compressed air injection is often used to address insufficient air intake during rapid acceleration and heavy propeller operation. The working principle is that when the vessel accelerates rapidly or docks, the crew manually presses the injection button on the control panel. Compressed air then enters the main engine intake manifold through a pressure reducing valve and a straight-through one-way control valve to replenish air to the cylinders. Simultaneously, it drives the turbocharger compressor impeller to accelerate, increasing the cylinder intake volume. However, in practice, this method is less effective due to variations in crew attention and operating habits. When the vessel is docking or undoing, navigating inland waterways, or in complex environments, failure to press the injection button in time can lead to reduced diesel engine performance due to transient excess air coefficient and decreased air-fuel mixture quality. This can even cause carbon buildup, valve burning, and in severe cases, cylinder scoring, significantly shortening the engine's lifespan and posing a serious threat to equipment and crew safety. Utility Model Content
[0003] The purpose of this utility model is to provide an automatic control system for diesel engine air injection and a marine diesel engine in order to solve at least one of the above-mentioned technical problems.
[0004] In a first aspect, this utility model provides an automated control system for diesel engine air replenishment, applied to a marine diesel engine; comprising: a pressure sensor, a flow sensor, a speed sensor, a PLC controller, a solenoid valve, a pneumatic control valve, and a gas cylinder; wherein, the pressure sensor is disposed on the control air circuit of the engine telegraph of the marine diesel engine, and the speed sensor is disposed on the marine diesel engine; the air supply port of the gas cylinder is connected to the air intake pipe of the marine diesel engine through an air pipeline, the flow sensor and the pneumatic control valve are disposed on the air pipeline, the air supply port of the gas cylinder is also connected to the pneumatic control terminal of the pneumatic control valve through a control air circuit, and the solenoid valve is disposed on the control air circuit; the pressure sensor, the flow sensor, the speed sensor, and the solenoid valve are all electrically connected to the PLC controller.
[0005] Furthermore, the pneumatic control valve includes an air-to-open type pneumatic control valve.
[0006] Furthermore, it also includes a control interface, which is electrically connected to the PLC controller.
[0007] Furthermore, the control interface is equipped with indicator lights, a flow meter, and control buttons; the indicator lights are used to indicate the working status of the diesel engine air replenishment automatic control system; the flow meter is used to display the air replenishment flow of the marine diesel engine based on the flow sensor; and the control buttons are used to control the opening and closing of the solenoid valve, thereby controlling the opening and closing of the air control valve.
[0008] Furthermore, it also includes a buzzer for issuing an alarm sound signal when the replenishment air flow of the marine diesel engine is abnormal.
[0009] Furthermore, the control interface is also equipped with a mute button to silence the alarm sound signal emitted by the buzzer.
[0010] Secondly, this utility model embodiment also provides a marine diesel engine, including the diesel engine air injection automatic control system provided in this utility model embodiment.
[0011] This invention provides an automated control system for diesel engine air replenishment and a marine diesel engine. By installing multiple sensors such as pressure sensors, flow sensors, and speed sensors on the marine diesel engine, and generating control information based on the detected engine telegraph signals, the PLC controller controls the solenoid valve to automatically open and close the pneumatic valve, thereby realizing automated control of diesel engine air replenishment. This can effectively solve the problem of insufficient air intake when ships are berthing or leaving the dock, accelerating rapidly, or under heavy oars, and overcome the problem of inaccurate timing of operation caused by factors such as the operator's work experience in existing air replenishment devices. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of an automated control system for diesel engine air injection provided in an embodiment of the present invention.
[0014] In the diagram: 1. Pressure sensor, 2. Flow sensor, 3. Speed sensor, 4. PLC controller, 5. Solenoid valve, 6. Pneumatic control valve, 7. Gas cylinder, 8. Engine telegraph, 9. First control air circuit, 10. Marine diesel engine, 11. Air pipeline, 12. Second control air circuit, 13. Turbocharger, 14. Control interface, 15. Signal light, 16. Flow indicator, 17. Control buttons, 18. Mute button. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Figure 1 This is a schematic diagram of an automated air injection control system for a diesel engine according to an embodiment of the present invention. This system is applied to marine diesel engines. Figure 1 As shown, the system includes: a pressure sensor 1, a flow sensor 2, a speed sensor 3, a PLC controller 4, a solenoid valve 5, a pneumatic control valve 6, and a gas cylinder 7. The gas cylinder 7 is filled with compressed air.
[0017] Specifically, such as Figure 1 As shown, pressure sensor 1 is installed on the first control air circuit 9 of engine telegraph 8 of marine diesel engine 10, and speed sensor 3 is installed on marine diesel engine 10.
[0018] The gas cylinder 7's gas supply port is connected to the air intake pipe of the marine diesel engine 10 through the air pipeline 11. The air pipeline 11 is equipped with a flow sensor 2 and a pneumatic control valve 6. The gas cylinder 7's gas supply port is also connected to the pneumatic control end of the pneumatic control valve 6 through the second control air circuit 12. The second control air circuit 12 is equipped with a solenoid valve 5.
[0019] Specifically, such as Figure 1 As shown, the air line 11 is connected to the compressor intake pipe of the turbocharger 13 of the marine diesel engine 10.
[0020] Specifically, pressure sensor 1, flow sensor 2, speed sensor 3 and solenoid valve 5 are all electrically connected to PLC controller 4.
[0021] In this embodiment of the utility model, pressure sensor 1 is used to monitor the pressure value of the engine telegraph signal sent by engine telegraph 8 to marine diesel engine 10 through control air circuit 9, and convert it into a digital signal for transmission to PLC controller 4;
[0022] The speed sensor 3 is used to monitor the operating speed of the marine diesel engine 10 and convert it into a digital signal to be transmitted to the PLC controller 4. The PLC controller 4 determines whether the operating speed is within the preset speed range.
[0023] The PLC controller 4 is used to automatically control the opening and closing of the solenoid valve 5 based on the pressure value and operating speed of the received vehicle telegraph signal, so as to control the opening and closing of the pneumatic control valve 6 and realize the automatic control of the on and off of the air pipeline 11.
[0024] Preferably, in this embodiment of the invention, the pneumatic control valve 6 includes an air-to-open type pneumatic control valve. Specifically, when the solenoid valve 5 is open, the gas cylinder 7 supplies gas to the pneumatic control terminal of the pneumatic control valve 6 through the control gas path 9, causing the gas pressure at the pneumatic control terminal to rise, and the pneumatic control valve 6 to open; when the solenoid valve 5 is closed, the gas pressure at the pneumatic control terminal of the pneumatic control valve 6 disappears, and the pneumatic control valve 6 closes, thus realizing the control of the opening and closing of the pneumatic control valve 6 by the opening and closing of the solenoid valve 5.
[0025] In one optional embodiment of this utility model, when the pressure value of the vehicle telegraph signal received by the PLC controller 4 exceeds a preset pressure threshold, an opening signal is sent to the solenoid valve 5 to control the pneumatic control valve 6 to open. At this time, the gas cylinder 7 supplies compressed air to the marine diesel engine 10 through the air pipeline 11. When the operating speed received by the PLC controller 4 exceeds a preset speed threshold, a closing signal is sent to the solenoid valve 5 to control the pneumatic control valve 6 to close. At this time, the gas cylinder 7 stops supplying air to the marine diesel engine 10.
[0026] Flow sensor 2 is used to monitor the compressed air flow in air pipeline 11 and transmit the monitoring results to PLC controller 4 so that PLC controller 4 can compare the monitoring results with the set value to determine whether there is a fault in the diesel engine air replenishment automatic control system.
[0027] Optionally, such as Figure 1 As shown, it also includes a control interface 14, which is electrically connected to the PLC controller 4.
[0028] Specifically, the control interface 14 is equipped with indicator lights 15, flow rate indicator 16, and control buttons 17.
[0029] Signal light 15 is used to indicate the operating status of the diesel engine air replenishment automatic control system; for example, signal light 15 includes operating status indicator lights (such as...). Figure 1 The indicator lights marked "Working" (as shown) and fault status indicator lights (such as...) Figure 1 The standard "fault" indicator light shown is as follows: When the diesel engine air replenishment automatic control system is in normal working condition, the working status indicator light is on; when the diesel engine air replenishment automatic control system is in fault condition, the fault status indicator light is on.
[0030] The flow indicator 16 is used to display the replenishment air flow of the marine diesel engine 10 based on the flow sensor 2.
[0031] Control button 17 is used to control the opening and closing of solenoid valve 5, thereby controlling the opening and closing of pneumatic valve 6.
[0032] Optionally, such as Figure 1As shown, the control buttons 17 include a manual / automatic switching knob, an air replenishment control button, and a stop control button; wherein, the manual / automatic switching knob is used to switch between the automatic control mode based on the PLC controller 4 and the manual control mode based on the crew.
[0033] Specifically, when switched to automatic control mode, the diesel engine air replenishment automatic control system automatically controls the air supply to the marine diesel engine 10 through the PLC controller 4; when switched to manual control mode, the crew can control the opening of the solenoid valve 5 through the air replenishment control key and the closing of the solenoid valve 5 through the stop control key, thereby controlling the opening and closing of the air control valve 6 to achieve manual control of the air supply to the marine diesel engine 10. This embodiment of the invention, through dual-mode switching control, ensures normal operation of the air replenishment function through manual control mode when the automatic control system based on the PLC controller 4 malfunctions.
[0034] Optionally, the diesel engine air replenishment automatic control system provided in this utility model embodiment also includes a buzzer for issuing an alarm sound signal when the air replenishment flow of the marine diesel engine 10 is abnormal.
[0035] Optionally, a mute button 18 is also provided on the control interface 14 to silence the alarm sound signal emitted by the buzzer.
[0036] As can be seen from the above description, the present invention provides an automated control system for diesel engine air injection, which has the following technical advantages compared with the prior art:
[0037] (1) Improve the reliability of ship main engine equipment: The main engine air replenishment device can effectively solve the problem of insufficient air intake when the ship is berthing or leaving the dock, accelerating rapidly, or under heavy oars. In the marine environment, under conditions such as material transportation and complex underwater obstacles, it can be applied to the equipment to perform emergency acceleration and avoidance, reversing acceleration and other operations in complex environments, thereby improving the survivability of ship equipment.
[0038] (2) Improve ship operation performance: It can be applied to navigation under complex conditions, such as high winds, fog, and night, where it is necessary to ensure the stable operation and rapid response of diesel engines. It can improve the reliability, environmental protection and maneuverability of ship equipment to a certain extent.
[0039] (3) Solve existing problems: Overcome the problem that existing air replenishment devices are not able to grasp the timing of operation due to factors such as the operator's work experience, or even not use the air replenishment function for a long time. It can achieve automatic air replenishment under working conditions such as docking and undocking, heavy oars, and complex navigation conditions.
[0040] This utility model also provides a marine diesel engine, including the diesel engine air injection automatic control system provided in the embodiments of this utility model.
[0041] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An automated control system for diesel engine air injection, characterized in that, Applications in marine diesel engines; including: pressure sensors, flow sensors, speed sensors, PLC controllers, solenoid valves, pneumatic control valves, and gas cylinders; among which, The pressure sensor is installed in the control air circuit of the engine telegraph of the marine diesel engine, and the speed sensor is installed on the marine diesel engine; The gas cylinder's gas supply port is connected to the marine diesel engine's air intake pipe via an air pipeline. The air pipeline is equipped with the flow sensor and the air control valve. The gas cylinder's gas supply port is also connected to the air control terminal of the air control valve via a control air circuit. The control air circuit is equipped with the solenoid valve. The pressure sensor, the flow sensor, the speed sensor, and the solenoid valve are all electrically connected to the PLC controller.
2. The diesel engine air injection automatic control system according to claim 1, characterized in that: The pneumatic control valve includes an air-to-open type pneumatic control valve.
3. The diesel engine air injection automatic control system according to claim 1, characterized in that: It also includes a control interface, which is electrically connected to the PLC controller.
4. The diesel engine air injection automatic control system according to claim 3, characterized in that: The control interface is equipped with indicator lights, a flow meter, and control buttons; The indicator light is used to indicate the operating status of the diesel engine air replenishment automatic control system; The flow indicator is used to display the air supply flow rate of the marine diesel engine based on the flow sensor. The control button is used to control the opening and closing of the solenoid valve, thereby controlling the opening and closing of the pneumatic valve.
5. The diesel engine air injection automatic control system according to claim 3, characterized in that: It also includes a buzzer for issuing an alarm sound when the replenishment air flow of the marine diesel engine is abnormal.
6. The diesel engine air injection automatic control system according to claim 5, characterized in that: The control interface is also equipped with a mute button to silence the alarm sound signal emitted by the buzzer.
7. A marine diesel engine, characterized in that, The diesel engine automatic air injection control system as described in any one of claims 1-6.