Oil return monitoring device for oil injector of marine diesel engine
By designing a fuel injector oil return monitoring device using float balls and floating plates, the accurate detection and adjustment of the fuel return amount of marine diesel engine fuel injectors is achieved, and the problems of difficulty in starting or inability to start are solved, ensuring the normal operation of the diesel engine.
Patent Information
- Application Number
- CN202411763856.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-02-28
AI Technical Summary
The oil return amount of marine diesel engine injectors is difficult to accurately detect, resulting in difficulty in starting or inability to start.
A marine diesel engine fuel injector oil return monitoring device is designed, and the floating up operation of float balls and floating plates is used to sense oil level sensors to realize oil level detection, and the oil return amount is adjusted to deal with excessive oil return amount by adjusting the oil output of the low-pressure oil outlet pump.
Accurate detection and adjustment of the fuel return amount of the fuel injector is achieved, avoiding the problems of difficulty in starting or inability to start, and ensuring the normal operation of the diesel engine.
Smart Images
Figure CN119532078A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil return monitoring for a marine fuel injector, and in particular to an oil return monitoring device for a marine diesel engine fuel injector. Background Art
[0002] The fuel injector is a precision device with very high processing accuracy, which requires a large dynamic flow range, strong anti-clogging and anti-pollution capabilities, and good atomization performance. The fuel injector receives the injection pulse signal sent by the ECU and accurately controls the fuel injection amount.
[0003] When the amount of injected oil is large, an oil return operation is required to circulate it to the oil tank again for recycling. The oil return detection device detects the amount of returned oil. When the amount of oil is large or small, it will affect the starting problem. Summary of the invention
[0004] The purpose of the present invention is to provide a marine diesel engine injector oil return monitoring device. The oil will cause the float and the floating plate to float and rise, and the floating plate will sense the oil level sensor during the rising process to realize the oil level detection operation. When the amount of oil returned from the injector is large, it will cause the engine to fail to start or start with difficulty. The large amount of oil returned indicates that the injector has a large internal leakage. At this time, the low-pressure oil pump can be adjusted according to the oil amount position.
[0005] To achieve the above-mentioned purpose, a marine diesel engine injector oil return monitoring device is provided, comprising: a tank body, wherein the tank body is characterized in that an oil outlet pipe is fixedly connected to one side of the top of the tank body, an oil return pipe is fixedly connected to the other side of the top of the tank body, a detection device body is fixedly connected to the middle of the oil return pipe, a sliding rod is fixedly connected to the inside of the detection device body symmetrically along the axial direction of the detection device body, the bottom ends of the sliding rods are slidably matched with floating plates, floating balls are fixedly connected between the floating plates, the top of the detection device body is fixedly connected to the injection pipe, the middle parts of the two side walls of the detection device body are fixedly connected to the oil level sensor, both ends of the floating plate are fixedly connected to mounting plates, and the top of the mounting plate is fixedly connected to the oil dipstick.
[0006] Furthermore, support blocks are fixedly connected to both upper and lower ends of one side of the oil level sensor, and the support block and the oil dipstick are slidably connected.
[0007] Furthermore, an oil outlet is provided in the middle of the bottom end of the detection device body.
[0008] Furthermore, a fuel filter and a low-pressure fuel outlet pump are provided on the oil outlet pipe.
[0009] Furthermore, a fuel injector is fixedly connected between the oil outlet pipe and the oil return pipe.
[0010] Furthermore, oil is provided inside the main body of the detection device. The present invention is provided with an oil return pipe, an oil level sensor and a detection device body. During the injection process, excess oil will flow back to the interior of the fuel tank body through the oil return pipe, and will pass through the detection device body during the reflux process. The excess oil will be sprayed out through the oil injection pipe, and the oil will float and rise the float ball and the float plate. During the rising process of the float plate, the oil dipstick and the oil level sensor are sensed to realize the oil level detection operation. When the oil return amount of the injector is large, the consequence will be that the start cannot be made or the start is difficult. The large oil return amount indicates that the internal leakage of the injector is large. At this time, the low-pressure oil outlet pump can be adjusted according to the oil amount position. When starting, the high-pressure oil pump has a low speed and limited oil supply. Less in and more out will inevitably cause oil rail pressure difficulty, so the oil supply needs to be appropriate, and the return oil amount must also meet the highest and lowest oil levels.
[0011] The present invention is provided with an oil outlet, a float and an oil level sensor. After the injector sprays out excess oil, the oil has not yet been discharged through the oil outlet, and the float and the float plate will float up. After the float plate rises, the oil dipstick will be pushed upwards first, and then the oil amount in the oil level sensor will be sensed. When the oil level continues to rise, the oil dipstick will rise higher. When the oil level sensor is at a high oil level, it is necessary to control the oil output of the low-pressure oil outlet pump to ensure a moderate oil output.
[0012] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments; Figure 1 This is a front view structural diagram of a diesel engine injector oil return monitoring device of the present invention; Figure 2 For the present invention Figure 1 The structure diagram at A is enlarged; Figure 3 This is an enlarged structural diagram of the main body of a detection device of a diesel engine injector oil return monitoring device of the present invention; Figure 4 For the present invention Figure 3 The structure at B in the figure is enlarged.
[0014] Legend: 1. Fuel tank body; 2. Oil return pipe; 3. Detection device body; 4. Fuel injector; 5. Oil outlet pipe; 6. Low-pressure oil outlet pump; 7. Fuel filter; 8. Slide rod; 9. Float plate; 10. Oil outlet; 11. Float ball; 12. Mounting plate; 13. Oil level sensor; 14. Support block; 15. Oil dipstick; 16. Oil. DETAILED DESCRIPTION
[0015] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0016] Reference Figure 1-4 The embodiment of the present invention is a marine diesel engine injector oil return monitoring device, which includes: a tank body 1, an oil outlet pipe 5 is fixedly connected to one side of the top of the tank body 1, and the oil 16 is circulated through the oil outlet pipe 5. The other side of the top of the tank body 1 is fixedly connected to an oil return pipe 2, and the middle of the oil return pipe 2 is fixedly connected to a detection device body 3. During the injection process, excess oil will flow back to the inside of the tank body 1 through the oil return pipe 2. During the reflux process, the oil will pass through the detection device body 3, and the oil level is detected through the internal structure of the detection device body 3. The inside of the detection device body 3 is symmetrically fixedly connected with a slide rod 8 along the axial direction of the detection device body 3, and the bottom end of the slide rod 8 is slidably matched with A floating plate 9 is fixedly connected with a floating ball 11 between the floating plates 9, and the buoyancy effect is increased by the floating ball 11. The floating plate 9 is kept in a stable position by the sliding rod 8 for lifting and lowering operations. A fuel injection pipe is fixedly connected to the top of the detection device body 3, and an oil level sensor 13 is fixedly connected to the middle of the two side walls of the detection device body 3. Both ends of the floating plate 9 are fixedly connected with a mounting plate 12, and the top of the mounting plate 12 is fixedly connected with an oil dipstick 15. The oil level sensor 13 senses the return oil volume. When the oil level continues to rise, the oil dipstick 15 inside the detection device body 3 will slide and rise. When the oil dipstick 15 continues to rise, the oil level sensor 13 is at a high oil level, and it is necessary to control the oil output by the low-pressure oil pump 6.
[0017] The upper and lower ends of one side of the oil level sensor 13 are fixedly connected with support blocks 14, and the oil dipstick 15 slides and rises relative to the support block 14. The middle part of the bottom end of the detection device body 3 is provided with an oil outlet 10. The oil outlet pipe 5 is provided with a fuel filter 7 and a low-pressure oil outlet pump 6. The low-pressure oil outlet pump 6 is used to extract the internal oil of the fuel tank body 1. The extracted oil is first filtered through the fuel filter 7. The injector 4 is fixedly connected between the oil outlet pipe 5 and the return oil pipe 2. The oil flows to the inside of the injector 4 through the oil outlet pipe 5, and the internal electric spark of the injector 4 is used to realize the injection and ignition operation.
[0018] Working principle: When in use, the internal oil of the fuel tank body 1 is first extracted by the low-pressure oil pump 6, and then filtered through the fuel filter 7. After filtering, it flows to the inside of the injector 4 through the oil outlet pipe 5, and the internal electric spark of the injector 4 realizes the injection ignition operation. During the injection process, excess oil will flow back to the inside of the fuel tank body 1 through the return oil pipe 2. During the reflux process, it will pass through the detection device body 3, and the excess oil in the injector 4 will be sprayed out into the return oil pipe 2 through the injection pipe. The oil 16 has not been discharged through the oil outlet 10, and the float 11 and the float plate 9 will float up. After the float plate 9 rises, the oil dipstick 15 will slide upward, and the oil level sensor 13 senses the oil amount. When the oil level continues to rise, the oil dipstick 15 rises higher. When the oil level sensor 13 is at a high oil level, it is necessary to control the oil output by the low-pressure oil pump 6.
[0019] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A marine diesel engine injector oil return monitoring device, characterized in that: include: A fuel tank body (1), wherein one side of the top of the fuel tank body (1) is fixedly connected to an oil outlet pipe (5), the other side of the top of the fuel tank body (1) is fixedly connected to an oil return pipe (2), the middle of the oil return pipe (2) is fixedly connected to a detection device body (3), the interior of the detection device body (3) is fixedly connected to a slide bar (8) symmetrically along the axial direction of the detection device body (3), the bottom ends of the slide bars (8) are slidably matched with a floating plate (9), a floating ball (11) is fixedly connected between the floating plates (9), the top of the detection device body (3) is fixedly connected to an oil injection pipe, the middle of the two side walls of the detection device body (3) are fixedly connected to an oil level sensor (13), both ends of the floating plate (9) are fixedly connected to a mounting plate (12), and the top of the mounting plate (12) is fixedly connected to an oil dipstick (15).
2. The fuel return monitoring device for a marine diesel engine injector according to claim 1, characterized in that: A support block (14) is fixedly connected to both upper and lower ends of one side of the oil level sensor (13), and the support block (14) and the oil dipstick (15) are slidably connected.
3. The fuel return monitoring device for a marine diesel engine injector according to claim 1, characterized in that: An oil outlet (10) is provided in the middle of the bottom end of the detection device body (3).
4. The fuel return monitoring device for a marine diesel engine injector according to claim 1, characterized in that: The oil outlet pipe (5) is provided with a fuel filter (7) and a low-pressure oil outlet pump (6).
5. The fuel return monitoring device for a marine diesel engine injector according to claim 1, characterized in that: A fuel injector (4) is fixedly connected between the fuel outlet pipe (5) and the fuel return pipe (2).
6. The fuel return monitoring device for a marine diesel engine injector according to claim 1, characterized in that: Oil (16) is provided inside the detection device body (3).