CN210440139U - Large-flow enhanced distribution volumetric common rail system - Google Patents
Large-flow enhanced distribution volumetric common rail system Download PDFInfo
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- CN210440139U CN210440139U CN201921287485.1U CN201921287485U CN210440139U CN 210440139 U CN210440139 U CN 210440139U CN 201921287485 U CN201921287485 U CN 201921287485U CN 210440139 U CN210440139 U CN 210440139U
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- connecting rod
- injector
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Abstract
The utility model belongs to the technical field of the diesel oil common rail system, concretely relates to large-traffic reinforcing volumetric common rail system that distributes. The high-flow enhanced distribution positive displacement common rail system comprises an oil tank, a filter, a high-pressure pump and an oil rail, wherein fuel oil in the oil tank is conveyed to the high-pressure pump through the filter, the fuel oil is pressurized by the high-pressure pump and then conveyed into the oil rail, the oil rail is communicated with a high-pressure connecting rod through a high-pressure oil pipe, an ECU (electronic control Unit) is connected with an oil injector through a control circuit, and when the oil injector is controlled to inject oil, the fuel oil in a pressure accumulation cavity in the high-pressure connecting rod is led to the oil injector and is injected to an engine combustion chamber through an oil circuit in. The beneficial effects are as follows: the working capacity of the common rail system is improved, and the problem that the common rail system is insufficient in oil injection on a high-power diesel engine is solved; the structure optimization scheme is simple and effective, and the development cost of the common rail system is saved.
Description
Technical Field
The utility model belongs to the technical field of the diesel oil common rail system, concretely relates to large-traffic reinforcing volumetric common rail system that distributes.
Background
When a high-power diesel engine works, a fuel injector needs larger fuel injection quantity, the problem of insufficient engine power is found in the development process of the current high-power diesel engine, and tests prove that the fuel injection quantity and the fuel injection speed of the engine fuel injector have larger differences with design parameters, and the fuel injection quantity of the fuel injector is insufficient, so that the problem of insufficient engine power is caused. Aiming at the problem of insufficient fuel supply of a fuel injection system of a high-power engine, no mature solution is provided at present, the market demand optimizes and improves the existing fuel common rail system, and the fuel injection capacity of the common rail system is improved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a remedy prior art's defect, provide a large-traffic reinforcing volumetric common rail system that distributes.
The utility model discloses a realize through following technical scheme:
the fuel in the fuel tank is conveyed to the high-pressure pump through the filter, the fuel is conveyed to the oil rail after being pressurized by the high-pressure pump, the fuel tank, the filter, the high-pressure pump and the oil rail are communicated through a fuel supply oil way, the oil rail is communicated with a high-pressure connecting rod through a high-pressure oil pipe, and an ECU (electronic control Unit) is connected with a fuel injector through a control circuit. When the oil sprayer is started, the internal control cavity is communicated with the low-pressure oil way and flows through the oil return oil way and the low-pressure oil way of the high-pressure pump to flow to the oil tank.
Furthermore, the high-pressure connecting rod is a filter-core-free pressure accumulation type high-pressure connecting rod structure and a filter-core pressure accumulation type high-pressure connecting rod structure.
Furthermore, a filter element is arranged at an oil inlet hole of the high-pressure connecting rod, when a needle valve of the oil sprayer is opened, oil is supplied to an internal oil duct of the oil sprayer through a small hole in the middle of the high-pressure connecting rod, in the oil spraying process of the oil sprayer, fuel oil in an internal oil duct of the oil sprayer and a pressure accumulation cavity of the high-pressure connecting rod is sprayed out, and meanwhile high-pressure oil in the oil rail is supplemented to the pressure accumulation cavity of the high-pressure connecting rod through a high-pressure oil pipe.
Furthermore, the volume of the pressure accumulation cavity of the high-pressure connecting rod is larger than the requirement of the single injection quantity of the oil injector, the pressure accumulation cavity directly supplies oil to the oil injector in the oil injection process of the oil injector, meanwhile, high-pressure oil in the oil rail is supplemented to the pressure accumulation cavity of the high-pressure connecting rod through the high-pressure oil pipe, the oil injector is enabled to inject oil at relatively stable injection pressure and injection rate through the large pressure accumulation cavity, and the working capacity of the common rail system is improved.
The utility model has the advantages that: the large-flow enhanced distribution volumetric common rail system is designed, the working capacity of the common rail system is improved, and the problem that the common rail system is insufficient in oil injection on a high-power diesel engine is solved; the structure optimization scheme is simple and effective, and the development cost of the common rail system is saved.
Drawings
The present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a diagram of a high-flow enhanced distribution volumetric common rail system of the present invention;
FIG. 2 is a conventional high-voltage connecting rod structure of the present invention;
FIG. 3 is a diagram of the filter element-free pressure accumulation type high-pressure connecting rod structure of the utility model;
figure 4 is the utility model discloses there is filter core pressure accumulation formula high pressure connecting rod structure.
In the figure, a fuel tank 01, a filter 02, a high-pressure pump 03, a fuel rail 04, a fuel injector 05, a high-pressure connecting rod 06, an ECU 07, a control circuit 08, a fuel supply oil path 09, a fuel return oil path 10, a pressure accumulation cavity 11 and a filter element 12 are arranged.
Detailed Description
Fig. 1-4 show an embodiment of the present invention. The utility model discloses a large-traffic reinforcing volumetric common rail system that distributes, including oil tank 01, filter 02, high-pressure pump 03 and oil rail 04, fuel in the oil tank 01, carry to high-pressure pump 03 through filter 02, fuel carries to in oil rail 04 after high-pressure pump 03 pressurizes, through fuel feeding oil circuit 09 intercommunication between oil tank 01, filter 02, high-pressure pump 03 and the oil rail 04, be linked together through high pressure fuel pipe between oil rail 04 and the high pressure connecting rod 06, according to the engine operating mode, when ECU 07 control sprayer 05 spouts the oil, the fuel of pressure accumulation chamber 11 accesss to sprayer 05 in the high pressure connecting rod 06, through the inside oil circuit of sprayer 05, through the orifice of sprayer 05, spout to the engine combustion chamber, when sprayer 05 is opened, internal control chamber and low pressure oil circuit communicate with each other, the low pressure oil circuit of oil return circuit 10 and high-pressure pump 03 flows through, flow direction oil tank 01.
Further, the high-pressure connecting rod 06 is a filter element 12-free pressure accumulation type high-pressure connecting rod 06 structure and a filter element 12-pressure accumulation type high-pressure connecting rod 06 structure.
Furthermore, a filter element 12 is arranged at an oil inlet hole of the high-pressure connecting rod 06, when a needle valve of the oil sprayer 05 is opened, oil is supplied to an internal oil passage of the oil sprayer 05 through a small hole in the middle of the high-pressure connecting rod 06, during oil spraying of the oil sprayer 05, the internal oil passage of the oil sprayer 05 and fuel oil in the pressure accumulation cavity 11 of the high-pressure connecting rod 06 are sprayed out, and meanwhile, high-pressure oil in the oil rail 04 is supplemented to the pressure accumulation cavity 11 of the high-pressure connecting rod 06 through a high-pressure oil pipe.
Furthermore, the volume of the pressure accumulation cavity 11 of the high-pressure connecting rod is larger than the requirement of the single injection quantity of the oil injector 05, the oil injector 05 directly supplies oil to the oil injector 05 in the oil injection process, meanwhile, high-pressure oil in the oil rail 04 is supplemented to the pressure accumulation cavity 11 of the high-pressure connecting rod 06 through a high-pressure oil pipe, the oil injector 05 is enabled to inject oil in a relatively stable injection pressure and injection rate through the large pressure accumulation cavity 11, and the working capacity of the common rail system is improved.
The utility model discloses a large-traffic reinforcing volumetric common rail system that distributes, the fuel in the oil tank 01 during the use is carried to high-pressure pump 03 through filter 02. The fuel is pressurized by the high-pressure pump 03 and then is conveyed into the fuel rail 04, the fuel rail 04 is communicated with the high-pressure connecting rod 06 through a high-pressure fuel pipe, and when the ECU 07 controls the fuel injector 05 to inject fuel according to the working condition of the engine, the fuel in the pressure accumulation cavity 11 in the high-pressure connecting rod 06 is led to the fuel injector 05 and finally is injected into a combustion chamber of the engine through a spray hole of the fuel injector 05 through an oil circuit in the fuel injector 05.
The utility model discloses a large-traffic reinforcing volumetric common rail system that distributes, conventional high-pressure connecting rod 06 is shown as attached figure 2, and oil feed hole department sets up filter core 12, when sprayer 05's needle valve was opened, through high-pressure connecting rod 06's middle part aperture, carries out the fuel feeding to sprayer 05's inside oil duct. In the process of oil injection of the oil injector 05, firstly, the fuel oil in the internal oil path of the oil injector 05 and the pressure accumulation cavity 11 of the high-pressure connecting rod 06 is sprayed out, and meanwhile, the high-pressure oil in the oil rail 04 is supplemented to the pressure accumulation cavity 11 of the high-pressure connecting rod 06 through a high-pressure oil pipe.
The utility model discloses a large-traffic reinforcing volumetric common rail system that distributes needs very big fuel injection quantity at powerful engine during operation, and the requirement of sprayer 05 single injection oil mass can not be satisfied to the high pressure oil of storing in sprayer 05 inside oil circuit and the high-pressure connecting rod 06 pressure accumulation chamber 11. The oil rail 04 is small in diameter of a pipeline for supplementing high-pressure oil to the pressure accumulation cavity 11 of the high-pressure connecting rod 06 through a high-pressure oil pipe, and the whole path is long, so that certain pressure loss of the high-pressure oil can be caused. The pressure loss of the high-pressure oil and the hysteresis of the supplemented fuel can cause that the injection pressure and the injection rate of the fuel injector 05 are high when the fuel injector starts to inject fuel, the injection pressure is reduced along with the rapid consumption of the fuel in the pressure storage cavity 11, the injection rate is reduced, the fuel injection quantity of the fuel injector 05 is rapidly reduced, the fuel injection quantity of the fuel injector 05 is insufficient within the specified injection time, and the working capacity of the common rail system is reduced.
The utility model discloses a large-traffic reinforcing volumetric common rail system that distributes, increase high pressure connecting rod 06 hold the volume of pressing chamber 11, see figure 3 and figure 4, hold the volume that presses chamber 11 and be greater than the requirement of sprayer 05 single injection volume. In the oil injection process of the oil injector 05, the pressure accumulation cavity 11 directly supplies oil to the oil injector 05, meanwhile, high-pressure oil in the oil rail 04 is supplemented to the pressure accumulation cavity 11 of the high-pressure connecting rod 06 through a high-pressure oil pipe, the large pressure accumulation cavity 11 enables the oil injector 05 to inject oil at relatively stable injection pressure and injection rate, and the working capacity of the common rail system is improved.
The utility model discloses an among the large-traffic reinforcing volumetric common rail system that distributes, high-pressure connecting rod 06 can be designed for there being no filter core 12 to hold pressure formula high-pressure connecting rod 06 structure and having filter core 12 to hold pressure formula high-pressure connecting rod 06 structure according to the demand, see attached 3 and attached 4.
The present invention is not limited to the above embodiments, and any person should learn to make under the teaching of the present invention and the present invention has the same or similar technical solution, and all fall into the protection scope of the present invention.
The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (4)
1. A large-flow enhanced distribution volumetric common rail system comprises an oil tank, a filter, a high-pressure pump and an oil rail, and is characterized in that fuel oil in the oil tank is conveyed to the high-pressure pump through the filter, the fuel oil is pressurized by the high-pressure pump and then conveyed into the oil rail, the oil tank, the high-pressure pump of the filter and the oil rail are communicated through an oil supply circuit, the oil rail and a high-pressure connecting rod are communicated through a high-pressure oil pipe, an ECU (electronic control unit) is connected with an oil injector through a control circuit, when the oil injector is controlled to inject oil, the fuel oil in a pressure storage cavity in the high-pressure connecting rod is led to the oil injector, and is injected to an engine combustion chamber through an oil circuit in the oil injector through a spray hole of the oil injector, when the oil injector is started.
2. A high flow enhanced distribution volumetric common rail system according to claim 1, wherein: the high-pressure connecting rod is a filter-core-free pressure accumulation type high-pressure connecting rod structure and a filter-core pressure accumulation type high-pressure connecting rod structure.
3. A high flow enhanced distribution volumetric common rail system according to claim 1 or 2, characterized in that: the fuel injection device is characterized in that a filter element is arranged at an oil inlet hole of the high-pressure connecting rod, when a needle valve of the fuel injector is opened, fuel is supplied to an internal oil duct of the fuel injector through a small hole in the middle of the high-pressure connecting rod, during the fuel injection process of the fuel injector, fuel in an internal oil duct of the fuel injector and a pressure accumulation cavity of the high-pressure connecting rod is sprayed out, and meanwhile high-pressure oil in an oil rail is supplemented to the pressure accumulation cavity of the high-pressure connecting rod through a high-pressure.
4. A high flow enhanced distribution volumetric common rail system according to claim 1, wherein: the volume of the pressure accumulation cavity is larger than the requirement of the single injection quantity of the oil injector, the pressure accumulation cavity directly supplies oil to the oil injector in the oil injection process of the oil injector, meanwhile, high-pressure oil in the oil rail is supplemented to the pressure accumulation cavity of the high-pressure connecting rod through the high-pressure oil pipe, the oil injector is enabled to inject oil in relatively stable injection pressure and injection rate through the large pressure accumulation cavity, and the working capacity of the common rail system is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287485.1U CN210440139U (en) | 2019-08-09 | 2019-08-09 | Large-flow enhanced distribution volumetric common rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287485.1U CN210440139U (en) | 2019-08-09 | 2019-08-09 | Large-flow enhanced distribution volumetric common rail system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210440139U true CN210440139U (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921287485.1U Active CN210440139U (en) | 2019-08-09 | 2019-08-09 | Large-flow enhanced distribution volumetric common rail system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210440139U (en) |
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2019
- 2019-08-09 CN CN201921287485.1U patent/CN210440139U/en active Active
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