CN216044058U - Diesel engine combustion control system with redundancy function - Google Patents
Diesel engine combustion control system with redundancy function Download PDFInfo
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- CN216044058U CN216044058U CN202122765776.0U CN202122765776U CN216044058U CN 216044058 U CN216044058 U CN 216044058U CN 202122765776 U CN202122765776 U CN 202122765776U CN 216044058 U CN216044058 U CN 216044058U
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Abstract
The utility model discloses a diesel engine combustion control system with redundant functions, which comprises an optical fiber pressure pulsation sensor, a diesel engine, a light source and light signal conditioning module, a data acquisition analyzer, a cylinder pressure monitoring processing center, a feedback control unit and a diesel engine fuel control valve, wherein the optical fiber pressure pulsation sensor is connected with the diesel engine fuel control valve; the inlet of the optical fiber pressure pulsation sensor is communicated with the pressure measuring port of an air cylinder in the diesel engine, the output end of the optical fiber pressure pulsation sensor and the input end of the light source and light signal conditioning module are connected, the output end of the light source and light signal conditioning module is connected with the input end of the data acquisition analyzer, the output end of the data acquisition analyzer is connected with the input end of an air cylinder pressure monitoring and processing center, the output end of the air cylinder pressure monitoring and processing center is connected with the control end of a fuel control valve of the diesel engine through a feedback control unit, and the system can accurately control fuel injection.
Description
Technical Field
The utility model relates to a diesel engine combustion control system, in particular to a diesel engine combustion control system with redundant functions.
Background
The oil injection parameters of a diesel engine are the main parameters for combustion control, which directly affect the combustion efficiency, power, oil consumption and pollutant emissions of the diesel engine. The existing diesel engine generally controls the oil injection time according to the crank angle, and under the same working condition, when the oil injection advance angle is larger, the temperature and the pressure in an air cylinder during oil injection are lower, and the average pressure and the average temperature in a combustion lag period are reduced, so that the combustion lag period is prolonged. The longer the combustion lag period is, the more combustible mixed gas and fuel which participates in premixed combustion are accumulated in the combustion lag period, and the combustible mixed gas is almost combusted together in the emergency period, so that the combustion acceleration and the heat release acceleration in the emergency period are increased, the highest combustion pressure in a cylinder is increased, the detonation phenomenon is generated in serious conditions, the mechanical load on a cylinder body and a cylinder cover is increased, the impact of gas combustion on a piston and a connecting rod is increased, and the connecting rod, a piston ring and a cylinder cover bolt can be broken.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and to provide a diesel engine combustion control system with redundant functions, which is capable of accurately controlling fuel injection.
In order to achieve the aim, the diesel engine combustion control system with the redundant function comprises an optical fiber pressure pulsation sensor, a diesel engine, a light source and light signal conditioning module, a data acquisition analyzer, a cylinder pressure monitoring processing center, a feedback control unit and a diesel engine fuel control valve;
the inlet of the optical fiber pressure pulsation sensor is communicated with the pressure measuring port of an air cylinder in the diesel engine, the output end of the optical fiber pressure pulsation sensor and the input end of the light source and light signal conditioning module are connected, the output end of the light source and light signal conditioning module is connected with the input end of the data acquisition analyzer, the output end of the data acquisition analyzer is connected with the input end of an air cylinder pressure monitoring and processing center, and the output end of the air cylinder pressure monitoring and processing center is connected with the control end of a fuel control valve of the diesel engine through a feedback control unit.
The optical fiber pressure pulsation sensor comprises a first optical fiber probe, a second optical fiber probe, a third optical fiber probe, a sensor upper cover, an upper heat-insulating layer, a sensor lower cover, a lower heat-insulating layer and a transmission film;
an upper heat insulation layer is arranged between the bottom of the upper sensor cover and the top of the lower sensor cover, a lower heat insulation layer is arranged at the bottom of the lower sensor cover, a pressure measurement cavity is arranged at the bottom of the lower sensor cover, a first metal sensing diaphragm, a second metal sensing diaphragm and a third metal sensing diaphragm are arranged in the pressure measurement cavity, a first vacuum heat insulation cavity is formed between the first metal sensing diaphragm and one side wall of the pressure measurement cavity, a second vacuum heat insulation cavity is formed between the second metal sensing diaphragm and the top of the pressure measurement cavity, a third vacuum heat insulation cavity is formed between the third metal sensing diaphragm and the other side wall of the pressure measurement cavity, and a first optical fiber probe penetrates through the upper sensor cover and the upper heat insulation layer, penetrates through the side wall of the lower sensor cover, is inserted into the first vacuum heat insulation cavity and is opposite to the first metal sensing diaphragm; the second optical fiber probe penetrates through the upper cover of the sensor and then is inserted into the second vacuum heat insulation cavity and is opposite to the second metal sensing diaphragm; the third optical fiber probe penetrates through the upper cover of the sensor and the upper heat insulation layer, penetrates through the side wall of the lower cover of the sensor, is inserted into the third vacuum heat insulation cavity and is opposite to the third metal sensing diaphragm;
the first optical fiber probe, the second optical fiber probe, the third optical fiber probe and the light source are connected with the optical signal conditioning module, a penetrating film is arranged at the bottom opening of the pressure measuring cavity, a plurality of air holes are formed in the penetrating film, and the pressure measuring cavity is communicated with a pressure measuring port of the diesel engine through the air holes.
The first optical fiber probe, the second optical fiber probe and the third optical fiber probe are connected with the optical signal conditioning module through the optical fiber bundle and the light source.
All the air-entraining holes are uniformly distributed.
The device also comprises a mounting nut; the mounting nut is sleeved on the peripheries of the upper sensor cover, the upper heat insulation layer and the lower sensor cover.
The sensor upper cover, the upper heat insulation layer, the sensor lower cover and the lower heat insulation layer are connected through diffusion welding.
The axes of the upper sensor cover, the upper heat insulation layer, the lower sensor cover and the lower heat insulation layer are overlapped.
The outer diameter of the upper cover of the sensor is 12mm, and the length of the upper cover of the sensor is 15 mm;
the outer diameter of the upper heat insulation layer is 12mm, and the thickness of the upper heat insulation layer is 2 mm;
the length of the pressure measuring cavity is 6mm, the width is 2mm, and the height is 2 mm;
the outer diameter of the lower heat insulation layer is 12mm, and the thickness of the lower heat insulation layer is 5 mm;
the diameters of the first optical fiber probe, the second optical fiber probe and the third optical fiber probe are all 1 mm;
the side lengths of the first metal sensing membrane, the second metal sensing membrane and the third metal sensing membrane are all 3mm, and the thickness of the first metal sensing membrane is 1 mm;
the pore diameter of the air guide hole is 0.5 mm.
The utility model has the following beneficial effects:
when the diesel engine combustion control system with redundant functions is in specific operation, the real-time pressure of high-temperature smoke in a cylinder is measured through the optical fiber pressure pulsation sensor, the cylinder pressure monitoring and processing center generates a diesel engine fuel control valve opening adjusting instruction according to the real-time pressure, then the diesel engine fuel control valve opening adjusting instruction is sent to the feedback control unit, the feedback control unit controls the opening of the diesel engine fuel control valve according to the diesel engine fuel control valve opening adjusting instruction so as to adjust the quantity of fuel entering the diesel engine in real time, the fuel atomization and blending effects are improved so as to ensure the combustion stability of the diesel engine, the engine detonation combustion fault is solved, the pollutant emission of the diesel engine is reduced, and the combustion efficiency, the stability and the reliability of the engine are improved, thereby improving the operation safety of the diesel engine.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the optical fiber pressure pulsation sensor according to the present invention.
The system comprises an optical fiber pressure pulsation sensor 1, a light source and optical signal conditioning module 2, a data acquisition analyzer 3, a cylinder pressure monitoring and processing center 4, a feedback control unit 5, an optical fiber bundle 6, a diesel engine 7, a first optical fiber probe 8, a second optical fiber probe 9, a third optical fiber probe 10, a sensor upper cover 11, an upper heat-insulating layer 12, a sensor lower cover 13, a lower heat-insulating layer 14, a third vacuum heat-insulating cavity 15, a third metal sensing diaphragm 16, a first vacuum heat-insulating cavity 17, a pressure measuring cavity 18, a transmission film 19, a first metal sensing diaphragm 20, a second metal sensing diaphragm 21, a second vacuum heat-insulating cavity 22 and a mounting nut 23.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the utility model. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the diesel engine combustion control system with redundant functions according to the present invention includes an optical fiber pressure pulsation sensor 1, a diesel engine 7, a light source and optical signal conditioning module 2, an optical fiber bundle 6, a data acquisition analyzer 3, a cylinder pressure monitoring processing center 4, a feedback control unit 5, and a diesel engine fuel control valve;
the inlet of the optical fiber pressure pulsation sensor 1 is communicated with the pressure measuring port of an air cylinder in a diesel engine 7, the output end of the optical fiber pressure pulsation sensor 1 is connected with the input end of the optical signal conditioning module 2 through an optical fiber bundle 6 and a light source, the output end of the light source and optical signal conditioning module 2 is connected with the input end of a data acquisition analyzer 3, the output end of the data acquisition analyzer 3 is connected with the input end of an air cylinder pressure monitoring and processing center 4, and the output end of the air cylinder pressure monitoring and processing center 4 is connected with the control end of a fuel control valve of the diesel engine through a feedback control unit 5;
referring to fig. 2, the optical fiber pressure pulsation sensor 1 includes a first optical fiber probe 8, a second optical fiber probe 9, a third optical fiber probe 10, a sensor upper cover 11, an upper heat insulation layer 12, a sensor lower cover 13, a lower heat insulation layer 14, a permeable membrane 19 and a mounting nut 23;
an upper heat insulation layer 12 is arranged between the bottom of the upper sensor cover 11 and the top of the lower sensor cover 13, a lower heat insulation layer 14 is arranged at the bottom of the lower sensor cover 13, a pressure measurement cavity 18 is arranged at the bottom of the lower sensor cover 13, wherein a first metal sensing diaphragm 20, a second metal sensing diaphragm 21 and a third metal sensing diaphragm 16 are arranged in the pressure measurement cavity 18, a first vacuum heat insulation cavity 17 is formed between the first metal sensing diaphragm 20 and one side wall of the pressure measurement cavity 18, a second vacuum heat insulation cavity 22 is formed between the second metal sensing diaphragm 21 and the top of the pressure measurement cavity 18, a third vacuum heat insulation cavity 15 is formed between the third metal sensing diaphragm 16 and the other side wall of the pressure measurement cavity 18, a first optical fiber probe 8 penetrates through the upper sensor cover 11 and the upper heat insulation layer 12, penetrates through the side wall of the lower sensor cover 13, is inserted into the first vacuum heat insulation cavity 17 and faces the first metal sensing diaphragm 20, the second optical fiber probe 9 passes through the sensor upper cover 11 and then is inserted into the second vacuum heat insulation cavity 22 and faces the second metal sensing diaphragm 21, and the third optical fiber probe 10 passes through the sensor upper cover 11 and the upper heat insulation layer 12 and then passes through the side wall of the sensor lower cover 13 and then is inserted into the third vacuum heat insulation cavity 15 and faces the third metal sensing diaphragm 16.
The first optical fiber probe 8, the second optical fiber probe 9 and the third optical fiber probe 10 are connected with the optical signal conditioning module 2 through an optical fiber bundle 6 and a light source, a permeable membrane 19 is arranged at the bottom opening of the pressure measuring cavity 18, wherein a plurality of air holes are arranged on the permeable membrane 19, and the pressure measuring cavity 18 is communicated with a pressure measuring port of the diesel engine 7 through the air holes.
The outer diameter of the upper cover 11 of the sensor is 12mm, the length of the upper cover is 15mm, the outer diameter of the upper heat-insulating layer 12 is 12mm, the thickness of the upper heat-insulating layer 12 is 2mm, the side length of a central square hole in the upper heat-insulating layer 12 is 2mm, the outer diameter of the upper heat-insulating layer 12 is 12mm, the length of the pressure measuring cavity 18 is 6mm, the width of the pressure measuring cavity is 2mm, the height of the pressure measuring cavity is 2mm, the outer diameter of the lower heat-insulating layer 14 is 12mm, the thickness of the lower heat-insulating layer is 5mm, and the side length of the central square hole in the lower heat-insulating layer 14 is 2 mm; the diameters of the first optical fiber probe 8, the second optical fiber probe 9 and the third optical fiber probe 10 are all 1 mm; the side lengths of the first metal sensing diaphragm 20, the second metal sensing diaphragm 21 and the third metal sensing diaphragm 16 are all 3mm, and the thickness is 1 mm; the pore diameter of the air guide hole is 0.5 mm.
The axes of the sensor upper cover 11, the upper heat insulation layer 12, the sensor lower cover 13 and the lower heat insulation layer 14 are overlapped, and the sensor upper cover 11, the upper heat insulation layer 12, the sensor lower cover 13 and the lower heat insulation layer 14 are connected through diffusion welding. The mounting nut 23 is sleeved on the peripheries of the sensor upper cover 11, the upper heat insulation layer 12 and the sensor lower cover 13.
The working process of the utility model is as follows:
high-temperature flue gas in a cylinder in a diesel engine 7 enters a pressure measuring cavity 18 through a gas-guiding hole, a first metal sensing diaphragm 20, a second metal sensing diaphragm 21 and a third metal sensing diaphragm 16 deform under the action of measured working medium pressure, a light source and optical signal conditioning module 2 emits measuring light beams which are transmitted to the first metal sensing diaphragm 20, the second metal sensing diaphragm 21 and the third metal sensing diaphragm 16 through a first optical fiber probe 8, a second optical fiber probe 9 and a third optical fiber probe 10 respectively, the measuring light beams are reflected by the first metal sensing diaphragm 20, the second metal sensing diaphragm 21 and the third metal sensing diaphragm 16 and then return to the light source and optical signal conditioning module 2 through the first optical fiber probe 8, the second optical fiber probe 9 and the third optical fiber probe 10 respectively, and the light source and optical signal conditioning module 2 converts reflected light in three directions into voltage signals;
the data acquisition analyzer 3 acquires voltage signals output by the light source and optical signal conditioning module 2 in real time according to the sampling frequency set by the cylinder pressure monitoring processing center 4 and outputs the voltage signals to the cylinder pressure monitoring processing center 4;
the cylinder pressure monitoring processing center 4 will voltage signal converts real-time pressure into, and cylinder pressure monitoring processing center 4 basis real-time pressure generates diesel engine fuel control valve aperture adjustment instruction, then will diesel engine fuel control valve aperture adjustment instruction sends feedback control unit 5, and feedback control unit 5 basis diesel engine fuel control valve aperture adjustment instruction control diesel engine fuel control valve's aperture to real-time regulation gets into the fuel quantity of diesel engine 7, makes real-time pressure is in predetermineeing the within range, in order to ensure that diesel engine 7 burns stably, reduces pollutant discharge, improves the economic nature and the security of engine.
Although the utility model has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.
Claims (8)
1. A diesel engine combustion control system with a redundancy function is characterized by comprising an optical fiber pressure pulsation sensor (1), a diesel engine (7), a light source and light signal conditioning module (2), a data acquisition analyzer (3), a cylinder pressure monitoring processing center (4), a feedback control unit (5) and a diesel engine fuel control valve;
the inlet of the optical fiber pressure pulsation sensor (1) is communicated with the pressure measuring port of an air cylinder in a diesel engine (7), the output end of the optical fiber pressure pulsation sensor (1) and the input end of the light source and light signal conditioning module (2) are connected, the output end of the light source and light signal conditioning module (2) is connected with the input end of the data acquisition analyzer (3), the output end of the data acquisition analyzer (3) is connected with the input end of an air cylinder pressure monitoring and processing center (4), and the output end of the air cylinder pressure monitoring and processing center (4) is connected with the control end of a fuel control valve of the diesel engine through a feedback control unit (5).
2. A diesel engine combustion control system with redundant functionality according to claim 1, characterized in that the fiber optic pressure pulsation sensor (1) comprises a first fiber optic probe (8), a second fiber optic probe (9), a third fiber optic probe (10), a sensor upper cover (11), an upper thermal insulation layer (12), a sensor lower cover (13), a lower thermal insulation layer (14), and a permeable membrane (19);
an upper heat insulation layer (12) is arranged between the bottom of an upper sensor cover (11) and the top of a lower sensor cover (13), a lower heat insulation layer (14) is arranged at the bottom of the lower sensor cover (13), a pressure measurement cavity (18) is arranged at the bottom of the lower sensor cover (13), a first metal sensing diaphragm (20), a second metal sensing diaphragm (21) and a third metal sensing diaphragm (16) are arranged in the pressure measurement cavity (18), a first vacuum heat insulation cavity (17) is formed between the first metal sensing diaphragm (20) and one side wall of the pressure measurement cavity (18), a second vacuum heat insulation cavity (22) is formed between the second metal sensing diaphragm (21) and the top of the pressure measurement cavity (18), a third vacuum heat insulation cavity (15) is formed between the third metal sensing diaphragm (16) and the other side wall of the pressure measurement cavity (18), and a first optical fiber probe (8) penetrates through the side wall of the lower sensor cover (13) after penetrating through the upper sensor cover (11) and the upper heat insulation layer (12) and is inserted into the first vacuum heat insulation layer (12) The hollow heat insulation cavity (17) is opposite to the first metal sensing diaphragm (20); the second optical fiber probe (9) penetrates through the upper cover (11) of the sensor and then is inserted into the second vacuum heat insulation cavity (22) and is opposite to the second metal sensing diaphragm (21); a third optical fiber probe (10) penetrates through the upper cover (11) of the sensor and the upper heat insulation layer (12) and then penetrates through the side wall of the lower cover (13) of the sensor to be inserted into a third vacuum heat insulation cavity (15) and is opposite to a third metal sensing diaphragm (16);
the first optical fiber probe (8), the second optical fiber probe (9), the third optical fiber probe (10) and the light source are connected with the optical signal conditioning module (2), a penetrating film (19) is arranged at the bottom opening of the pressure measuring cavity (18), wherein a plurality of air holes are formed in the penetrating film (19), and the pressure measuring cavity (18) is communicated with a pressure measuring port of the diesel engine (7) through the air holes.
3. The diesel engine combustion control system with redundant function according to claim 2, characterized in that the first fiber optic probe (8), the second fiber optic probe (9) and the third fiber optic probe (10) are connected with the optical signal conditioning module (2) via the fiber bundle (6) and the light source.
4. Diesel engine combustion control system with redundant functionality according to claim 2, characterized in that the bleed air holes are evenly distributed.
5. The diesel engine combustion control system with redundant functionality according to claim 2, further comprising a mounting nut (23); the mounting nut (23) is sleeved on the peripheries of the sensor upper cover (11), the upper heat insulation layer (12) and the sensor lower cover (13).
6. The diesel engine combustion control system with redundant function according to claim 2, characterized in that the sensor upper cover (11), the upper heat insulating layer (12), the sensor lower cover (13), and the lower heat insulating layer (14) are connected by diffusion welding.
7. The diesel engine combustion control system with redundant function according to claim 2, characterized in that axes of the sensor upper cover (11), the upper heat insulating layer (12), the sensor lower cover (13), and the lower heat insulating layer (14) coincide.
8. The diesel engine combustion control system with redundant function according to claim 4, characterized in that the sensor upper cover (11) has an outer diameter of 12mm and a length of 15 mm;
the outer diameter of the upper heat insulation layer (12) is 12mm, and the thickness is 2 mm;
the length of the pressure measuring cavity (18) is 6mm, the width is 2mm, and the height is 2 mm;
the outer diameter of the lower heat insulation layer (14) is 12mm, and the thickness is 5 mm;
the diameters of the first optical fiber probe (8), the second optical fiber probe (9) and the third optical fiber probe (10) are all 1 mm;
the side lengths of the first metal sensing diaphragm (20), the second metal sensing diaphragm (21) and the third metal sensing diaphragm (16) are all 3mm, and the thickness of the first metal sensing diaphragm is 1 mm;
the pore diameter of the air guide hole is 0.5 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122765776.0U CN216044058U (en) | 2021-11-11 | 2021-11-11 | Diesel engine combustion control system with redundancy function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122765776.0U CN216044058U (en) | 2021-11-11 | 2021-11-11 | Diesel engine combustion control system with redundancy function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915010A (en) * | 2021-11-11 | 2022-01-11 | 西安热工研究院有限公司 | Diesel engine combustion control system with triple redundancy function |
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- 2021-11-11 CN CN202122765776.0U patent/CN216044058U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915010A (en) * | 2021-11-11 | 2022-01-11 | 西安热工研究院有限公司 | Diesel engine combustion control system with triple redundancy function |
| CN113915010B (en) * | 2021-11-11 | 2024-01-30 | 西安热工研究院有限公司 | Diesel engine combustion control system with triple redundancy function |
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