CN217761165U - Four-pump four-rail arrangement type 8-cylinder marine diesel engine high-pressure common rail device - Google Patents
Four-pump four-rail arrangement type 8-cylinder marine diesel engine high-pressure common rail device Download PDFInfo
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- CN217761165U CN217761165U CN202222030898.XU CN202222030898U CN217761165U CN 217761165 U CN217761165 U CN 217761165U CN 202222030898 U CN202222030898 U CN 202222030898U CN 217761165 U CN217761165 U CN 217761165U
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Abstract
The utility model belongs to the technical field of the engine, a 8 jar marine diesel engine high pressure common rail devices of four rails of four pumps arrangement form is disclosed, including 8 mechanical pump installation positions, 8 four high-pressure oil pumps and four rail pipes altogether are installed respectively to mechanical pump installation position, and the oil tank is connected to every through the low pressure oil circuit high-pressure oil pump, every a rail pipe altogether is connected to the high-pressure oil pump, every rail pipe is established ties mutually altogether, every rail pipe altogether passes through high pressure oil circuit and connects automatically controlled sprayer, the electronic control unit is connected to automatically controlled sprayer, the automatically controlled sprayer of electronic control unit control spouts the fuel into the cylinder. The utility model adopts four common-rail pipes to connect the high-pressure oil pump, and the four common-rail pipes are mutually communicated, thereby effectively improving the reliability of the device and the stability of oil pressure, and having good consistency of oil injection; the four pumps are arranged in four tracks, so that the structure is compact and the arrangement is simple; the high-pressure oil pipe has uniform length, small processing difficulty and small oil pressure fluctuation.
Description
Technical Field
The utility model belongs to the technical field of the engine, especially, relate to a four pumps four rails arrange 8 jar marine diesel engine high pressure common rail devices of form.
Background
The ship transportation is an important component of transportation, at present, the ship power is mainly a diesel engine, and a large amount of carbon dioxide is generated after the diesel engine is combusted, so that the global greenhouse effect is aggravated. The existing mechanical plunger pump type marine diesel engine has the disadvantages of unadjustable timing and regular oil injection, poor uniformity of oil supply of each cylinder and poor combustion performance of oil in the cylinder, thus causing high consumption rate of fuel oil, large discharge of carbon dioxide and the like and great pollution to the environment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a four pumps four rails arrange 8 jar marine diesel engine high pressure common rail devices of form to solve foretell technical problem.
In order to achieve the above object, the utility model discloses a four pumps four rails arrange 8 jar marine diesel engine high pressure common rail devices of form concrete technical scheme as follows:
a four-pump four-rail arrangement type high-pressure common rail device of an 8-cylinder marine diesel engine comprises 8 mechanical pump installation positions, wherein the 8 mechanical pump installation positions are respectively provided with four high-pressure oil pumps and four common rail pipes, an oil tank is connected to each high-pressure oil pump through a low-pressure oil line, each high-pressure oil pump is connected with one common rail pipe, the common rail pipes are mutually connected in series, each common rail pipe is connected with an electric control oil injector through a high-pressure oil line, the electric control oil injector is connected with an electronic control unit, and the electronic control unit controls the electric control oil injector to inject fuel oil into an air cylinder.
Further, the high-pressure oil pump and the common rail pipe are installed in a pairwise adjacent mode.
Furthermore, the common rail pipe is provided with a flow limiting valve, the flow limiting valve is connected with the electric control oil injector through a high-pressure oil path, and the flow limiting valve automatically cuts off when the oil quantity is 1.5 times larger than the rated oil quantity.
Further, each of the common rail pipes has two flow limiting valves.
Furthermore, the electric control oil injector adopts an electromagnetic valve to control oil injection.
Furthermore, every high-pressure oil pump has a proportional valve, the proportional valve is connected with the electronic control unit electricity, the electronic control unit changes proportional valve oil feed sectional area through pulse signal.
Furthermore, one of the common rail pipes is provided with a pressure sensor and a safety valve, the safety valve is connected with the low-pressure oil way, the pressure sensor and the safety valve are electrically connected with an electronic control unit, and the electronic control unit controls the on-off of the safety valve according to signals of the pressure sensor.
Further, one of the common rail pipes is provided with a stop valve, the stop valve is electrically connected with an electronic control unit, and the electronic control unit realizes emergency shutdown by opening the stop valve.
The utility model discloses a four pumps four rails arrange form's marine diesel engine high pressure of jar and share rail device has following advantage:
the utility model adopts four common-rail pipes to connect the high-pressure oil pump, and the four common-rail pipes are mutually communicated, thereby effectively improving the reliability of the device and the stability of oil pressure, and having good consistency of oil injection; the four pumps are arranged in four tracks, so that the structure is compact and the arrangement is simple; the high-pressure oil pipe has uniform length, small processing difficulty and small oil pressure fluctuation. Simultaneously, the device controls the operation of each part through the electronic control unit, and realizes that:
1. the oil injection pressure is flexibly adjustable, different injection pressures can be adopted under different working conditions, and the comprehensive performance of the diesel engine is optimized;
2. the oil injection timing is flexible and adjustable, the optimal oil injection timing can be adopted under different working conditions, the emission of NOx and Particles (PM) is reduced, and the emission requirement is met;
3. the flexible adjustable oil injection speed realizes ideal oil injection rule, realizes pre-injection and multiple injection, can reduce NOx of the diesel engine and can ensure excellent dynamic property and economy;
4. the electric control oil injector is controlled by the electromagnetic valve to inject oil, the control precision is high, the change of the circulating oil injection quantity is small in the operation range of the diesel engine, the oil supply unevenness of each cylinder is improved, the vibration of the diesel engine is reduced, and the emission is reduced.
Drawings
Fig. 1 is a schematic structural view of a high-pressure common rail device of an 8-cylinder marine diesel engine with a four-pump four-rail arrangement form according to the present invention;
description of the reference numerals: in the figure, 1-oil tank, 2-cut-off valve, 3-flow limiting valve, 4-common rail pipe, 5-proportional valve, 6-high pressure oil pump, 7-pressure sensor, 8-safety valve, 9-electric control oil injector and 10-electronic control unit.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following figures are combined to further describe the high-pressure common rail device of the 8-cylinder marine diesel engine in the four-pump four-rail arrangement form of the present invention in detail.
The marine 8 jar diesel engines of marine includes the space of arranging of 8 mechanical pumps, as shown in fig. 1, the utility model discloses a four pumps four rails arrange 8 jar marine diesel engine high pressure common rail device of form is improved on the structure basis of marine 8 jar diesel engines, installs a high-pressure oil pump 6 in the installation position of marine 8 jar diesel engines every position, installs four high-pressure oil pumps 6 altogether, installs four common rail pipes 4 in four other installation positions, and high-pressure oil pump 6 and two liang of adjacent installations of common rail pipe 4. The oil tank 1 is connected to each high-pressure oil pump 6 through a low-pressure oil path, each high-pressure oil pump 6 is connected to an adjacent common rail pipe 4, and the common rail pipes 4 are connected in series through high-pressure oil paths. Each common rail pipe 4 is provided with two flow limiting valves 3, each flow limiting valve 3 is connected with an electric control oil injector 9 through a high-pressure oil way, and the electric control oil injector 9 adopts an electromagnetic valve to control oil injection. The flow limiting valve 3 automatically cuts off when the oil quantity is 1.5 times larger than the rated oil quantity, so that abnormal combustion in a cylinder caused by the fault of the electric control oil injector 9 is prevented, and the structure of an engine is prevented from being damaged. Each high-pressure oil pump 6 has a proportional valve 5, and the proportional valve 5 is used for adjusting the oil inlet sectional area. One common rail pipe 4 is provided with a pressure sensor 7 and a safety valve 8, the safety valve 8 is connected with a low-pressure oil way and used for being opened when the rail pressure is higher than the upper limit, and part of high-pressure fuel oil is input into the low-pressure oil pipe and flows back to the oil tank 1 to release the overhigh rail pressure and ensure the safe operation of the common rail system. One of the common rail pipes 4 is provided with a shut-off valve 2, and the shut-off valve 2 is used for rapidly unloading system pressure of the diesel engine under emergency conditions to realize emergency shutdown. The proportional valve 5, the pressure sensor 7, the safety valve 8, the cut-off valve 2 and the electronic control fuel injector 9 are electrically connected with an electronic control unit 10. The electronic control unit 10 changes the oil inlet sectional area of the proportional valve 5 through a pulse signal, and further adjusts the oil inlet amount; the safety valve 8 is controlled to open to release pressure through the signal of the pressure sensor 7; in emergency, the emergency stop is realized by opening the cut-off valve 2; fuel is injected into the cylinder by controlling the electrically controlled fuel injector 9.
When the fuel pump is used, fuel in the fuel tank 1 is sucked out by the low-pressure fuel pump and is input into the high-pressure fuel pump 6, the high-pressure fuel pump 6 pressurizes the fuel and inputs the pressurized fuel into the common rail pipe 4, wherein the electronic control unit 10 changes the oil inlet sectional area of the proportional valve 5 through pulse signals, and further adjusts the oil inlet amount;
the electronic control unit 10 adjusts the fuel pressure in the common rail pipe 4 according to the signal of the pressure sensor 7, if the rail pressure is too high, the safety valve 8 is opened, and part of the high-pressure fuel enters the low-pressure fuel pipe;
the fuel oil in the common rail pipe 4 reaches the electric control fuel injector 9 through the high-pressure fuel pipe 6;
the electronic control unit 10 determines the fuel injection timing and duration according to specific working conditions (the rotation speed and the load of the engine);
the electronic fuel injector 9 injects fuel into the cylinder according to the instruction of the electronic control unit 10.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (8)
1. The high-pressure common rail device of the marine diesel engine with the 8 cylinders and the four rails in the four-pump four-rail arrangement mode comprises 8 mechanical pump installation positions and is characterized in that the 8 mechanical pump installation positions are respectively provided with four high-pressure oil pumps (6) and four common rail pipes (4), an oil tank (1) is connected to each high-pressure oil pump (6) through a low-pressure oil way, each high-pressure oil pump (6) is connected with one common rail pipe (4), the common rail pipes (4) are connected in series, each common rail pipe (4) is connected with an electric control oil injector (9) through a high-pressure oil way, the electric control oil injector (9) is connected with an electronic control unit (10), and the electronic control unit (10) controls the electric control oil injector (9) to inject fuel oil into an air cylinder.
2. The 8-cylinder marine diesel high pressure common rail apparatus of a four-pump four-rail arrangement according to claim 1, wherein the high pressure oil pump (6) and the common rail pipe (4) are installed adjacent to each other two by two.
3. The high-pressure common rail device of the 8-cylinder marine diesel engine with the four-pump four-rail arrangement as claimed in claim 1, characterized in that the common rail pipe (4) has a flow limiting valve (3), the flow limiting valve (3) is connected with the electrically controlled fuel injector (9) through a high-pressure oil line, and the flow limiting valve (3) automatically cuts off the flow when the oil amount is 1.5 times greater than the rated oil amount.
4. A four-pump four-rail arrangement of an 8-cylinder marine diesel high pressure common rail arrangement according to claim 3, characterized in that each common rail pipe (4) has two flow restriction valves (3).
5. The high-pressure common rail device of the 8-cylinder marine diesel engine with the four-pump four-rail arrangement as claimed in claim 1, characterized in that the electrically controlled fuel injector (9) injects fuel using an electromagnetic valve.
6. The high pressure common rail apparatus of an 8-cylinder marine diesel engine in a four-pump four-rail arrangement according to claim 1, wherein each of the high pressure oil pumps (6) has a proportional valve (5), the proportional valves (5) are electrically connected to an electronic control unit (10), and the electronic control unit (10) changes the oil inlet sectional area of the proportional valves (5) by a pulse signal.
7. The high-pressure common rail device of the 8-cylinder marine diesel engine with the four-pump four-rail arrangement according to claim 1, wherein one of the common rail pipes (4) is provided with a pressure sensor (7) and a safety valve (8), the safety valve (8) is connected with a low-pressure oil path, the pressure sensor (7) and the safety valve (8) are electrically connected with an electronic control unit (10), and the electronic control unit (10) controls the safety valve (8) to be switched on and off according to a signal of the pressure sensor (7).
8. The 8-cylinder marine diesel high pressure common rail arrangement according to claim 1, characterized in that one of the common rail pipes (4) has a shut-off valve (2), the shut-off valve (2) being electrically connected to an electronic control unit (10), the electronic control unit (10) effecting an emergency shutdown by opening the shut-off valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222030898.XU CN217761165U (en) | 2022-08-03 | 2022-08-03 | Four-pump four-rail arrangement type 8-cylinder marine diesel engine high-pressure common rail device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222030898.XU CN217761165U (en) | 2022-08-03 | 2022-08-03 | Four-pump four-rail arrangement type 8-cylinder marine diesel engine high-pressure common rail device |
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| Publication Number | Publication Date |
|---|---|
| CN217761165U true CN217761165U (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222030898.XU Active CN217761165U (en) | 2022-08-03 | 2022-08-03 | Four-pump four-rail arrangement type 8-cylinder marine diesel engine high-pressure common rail device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217761165U (en) |
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2022
- 2022-08-03 CN CN202222030898.XU patent/CN217761165U/en active Active
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