CN203035417U - Oil injection pump with electric control oil limiting device - Google Patents
Oil injection pump with electric control oil limiting device Download PDFInfo
- Publication number
- CN203035417U CN203035417U CN 201320018605 CN201320018605U CN203035417U CN 203035417 U CN203035417 U CN 203035417U CN 201320018605 CN201320018605 CN 201320018605 CN 201320018605 U CN201320018605 U CN 201320018605U CN 203035417 U CN203035417 U CN 203035417U
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- oil
- piston
- valve
- fuel
- injection pump
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Abstract
The utility model discloses an oil injection pump with an electric control oil limiting device. The oil injection pump with the electric control oil limiting device comprises an oil delivery pump and a pump body assembly, and is characterized in that a pressure control valve and an electric control oil limiting valve are arranged in an oil inlet channel which is arranged between the oil delivery pump and the pump body assembly, and the electric control oil limiting valve is a proportional magnetic valve. The proportional magnetic valve is arranged on the oil inlet channel of the pump body assembly, and the fuel flow rate is controlled by adjusting opening degree of the proportional magnetic valve, and the purpose of adjusting fuel supply of the oil injection pump is achieved. A pressure control valve which is arranged between the oil delivery pump and the proportional magnetic valve enables fuel inlet pressure to be kept in constant, thereby guaranteeing the fuel flow rate and the opening degree of the proportional magnetic valve to be a linear scale.
Description
Technical field
The utility model belongs to the diesel engine of vehicle technical field, relates to a kind of Injection Pump that has automatically controlled fuel limit device.
Background technique
The motor that rules and regulations satisfy state's 4 exhaust emission standards must possess OBD(on-board diagnostic On-Board Diagnostics (OBD)) system, and the OBD system wherein an indispensable function be torque limited, monitor namely that motor breaks down or exhaust emissions when not up to standard, can show malfunction alarm.Indication continues to step on the gas even the driver ignores malfunction alarm, and the OBD system also can cross driver command and force to reduce Engine torque to below 60% of former machine moment of torsion, thereby reaches the purpose that reduces exhaust emissions and protection motor.The existing machinery Injection Pump lacks above function.Injection Pump can't stop oil when the stuck fault of Injection Pump generation pull bar in addition, and motor can't stop working.
Summary of the invention
The utility model purpose is the function that makes the hydraulic injection pump can realize torque limited among the OBD and still can makes Injection Pump stop oil spout when the stuck fault of Injection Pump generation pull bar to make engine misses.
The utility model adopts following technological scheme for achieving the above object:
A kind of Injection Pump that has automatically controlled fuel limit device comprises oil transfer pump, pump housing assembly, it is characterized in that: be provided with pressure controlled valve and automatically controlled limit fuel tap in the oil inlet passage between described oil transfer pump and pump housing assembly.
It is further characterized in that: described automatically controlled limit fuel tap is proportional electromagnetic valve, described proportional electromagnetic valve comprises piston, spring, armature, coil and housing, spring is installed in the piston back side, the piston lower edge is armature, coil is arranged at the armature below, spring force is opposite with the electromagnetic force direction, and case top is that the piston top is provided with filler opening, is provided with oil outlet in the piston head stroke range of housing side.
Further: the piston-top surface of described proportional electromagnetic valve has aperture, is communicated with internal piston and outside.
Its further feature also is: described pressure controlled valve comprises valve body, piston, compression spring, and the mesopore of perforation is arranged in the valve body, and described piston is installed in the mesopore, and the compression spring is installed in the piston back; The valve body bottom has an oil input channel, sidewall to have an oil road and a draining road to be communicated with mesopore, and oil road links to each other with automatically controlled limit fuel tap, and the draining road links to each other with fuel tank; Oil road and draining road are arranged on the described piston stroke, and the distance of draining track pitch valve body entrance is greater than the distance of oil road apart from the valve body entrance.
The utility model is installed a proportional electromagnetic valve at the oil inlet passage of pump housing assembly, regulates the aperture control fuel flow of proportional electromagnetic valve, thereby reaches the purpose of regulating the Injection Pump fuel delivery.And a pressure controlled valve has been installed between oil transfer pump and proportional electromagnetic valve has been made input pressure keep constant, to guarantee the linear ratio of aperture of fuel flow and proportional electromagnetic valve.
Description of drawings
Fig. 1 is the utility model schematic representation.
Fig. 2-4 is the fundamental diagram of the utility model proportional electromagnetic valve.
Fig. 5-7 is the fundamental diagram of the utility model pressure controlled valve.
Embodiment
A kind of Injection Pump that has automatically controlled fuel limit device comprises oil transfer pump 1, pump housing assembly 4 as shown in Figure 1, at the oil outlet place of oil transfer pump 1 pressure controlled valve 2 has been installed, and proportional electromagnetic valve 3 is installed on the pump housing assembly 4.Fuel oil enters pressure controlled valve 2 from oil transfer pump 1, and the fuel oil that is adjusted into constant pressure through pressure controlled valve 2 is transported to proportional electromagnetic valve 3 by oil pipe (not drawing among the figure).
As shown in Figure 2, described proportional electromagnetic valve 3 comprises piston of electromagnetic valve 6, spring 7, armature, coil 5 and housing 8, spring 7 is installed in piston of electromagnetic valve 6 back sides, piston of electromagnetic valve 6 lower edges are armature, coil 5 is arranged at the armature below, spring force is opposite with the electromagnetic force direction, and housing 8 tops are that the piston top is provided with filler opening, are provided with oil outlet in the housing 8 side piston head stroke range.Piston of electromagnetic valve 6 end faces of described proportional electromagnetic valve have aperture, are communicated with internal piston and outside, make the suffered fluid pressure balance in piston two sides.
As shown in Figure 5, described pressure controlled valve 2 comprises valve body, piston 11, compression spring 12, and the mesopore of perforation is arranged in the valve body, and described piston 11 is installed in the mesopore, and compression spring 12 is installed in piston 11 backs; The valve body bottom has an oil input channel 9, sidewall to have oil road 10 and draining road 13 to be communicated with mesopore, and oil road 10 links to each other with proportional electromagnetic valve 3, and draining road 13 links to each other with fuel tank; Oil road 10 and draining road 13 are arranged on described piston 11 strokes, and 13 positions, draining road are higher than oil road 10.
Proportional electromagnetic valve 3 working principles are as follows:
Fig. 2: when the driving current of proportional electromagnetic valve 3 was the nominal operation value, coil 5 attracted piston of electromagnetic valve 6 to overcome spring 7 power and reaches range, valve wide open, and oil circuit is unblocked, and the fuel delivery of Injection Pump is unrestricted, can reach the maximum spout oil mass.
Fig. 3: reduce the driving current of proportional electromagnetic valve 3, electromagnetic force reduces, and balances each other with the spring force of spring 7 when a certain compression stroke, and the circulation area of oil circuit reduces, and has limited the fuel flow that enters Injection Pump, has namely limited the moment of torsion that diesel engine can reach.Because fuel pressure is steady state value, just can controls the fuel flow that enters Injection Pump by the aperture of regulating driving current value adjustment valve, thereby reach the purpose of accurate restriction diesel engine moment of torsion.
Fig. 4: when the driving current of proportional electromagnetic valve 3 was zero, piston of electromagnetic valve 6 is throttle down under the spring force effect, and oil circuit is blocked, and fuel oil can not enter Injection Pump, and Injection Pump is fuel feeding not, engine misses.
Pressure controlled valve 2 working principles are as follows:
Fig. 5: fuel oil enters the pressure controlled valve 2 from oil input channel 9, when the pressure of fuel oil is lower than initial tension of spring, can not jack-up piston 11, and fuel oil can not be confessed.
Fig. 6: when fuel pressure reached above initial tension of spring, compression spring 12 was compressed, jack-up piston 11, and fuel oil flows to proportional electromagnetic valve 3 from oil road 10.
Fig. 7: when fuel pressure was too high, compression spring 12 was further compressed, and draining road 13 is opened, and fuel flow returns is avoided overpressure to fuel tank.The cracking pressure of oil road 10 is P1, and the cracking pressure in draining road 13 is P2, remains greater than P1 less than P2 so supply with the fuel pressure of proportional electromagnetic valve 3.
Claims (4)
1. an Injection Pump that has automatically controlled fuel limit device comprises oil transfer pump, pump housing assembly, it is characterized in that: be provided with pressure controlled valve and automatically controlled limit fuel tap in the oil inlet passage between described oil transfer pump and pump housing assembly.
2. the Injection Pump that has automatically controlled fuel limit device according to claim 1, it is characterized in that: described automatically controlled limit fuel tap is proportional electromagnetic valve, described proportional electromagnetic valve comprises piston, spring, armature, coil and housing, spring is installed in the piston back side, the piston lower edge is armature, and coil is arranged at the armature below, and spring force is opposite with the electromagnetic force direction, case top is that the piston top is provided with filler opening, is provided with oil outlet in the piston head stroke range of housing side.
3. the Injection Pump that has automatically controlled fuel limit device according to claim 2, it is characterized in that: the piston-top surface of described proportional electromagnetic valve has aperture, is communicated with internal piston and outside.
4. the Injection Pump that has automatically controlled fuel limit device according to claim 1, it is characterized in that: described pressure controlled valve comprises valve body, piston, compression spring, the mesopore that perforation is arranged in the valve body, described piston is installed in the mesopore, and the compression spring is installed in the piston back; The valve body bottom has an oil input channel, sidewall to have an oil road and a draining road to be communicated with mesopore, and oil road links to each other with automatically controlled limit fuel tap, and the draining road links to each other with fuel tank; Oil road and draining road are arranged on the described piston stroke, and the distance of draining track pitch valve body entrance is greater than the distance of oil road apart from the valve body entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018605 CN203035417U (en) | 2013-01-14 | 2013-01-14 | Oil injection pump with electric control oil limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018605 CN203035417U (en) | 2013-01-14 | 2013-01-14 | Oil injection pump with electric control oil limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035417U true CN203035417U (en) | 2013-07-03 |
Family
ID=48687547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320018605 Expired - Lifetime CN203035417U (en) | 2013-01-14 | 2013-01-14 | Oil injection pump with electric control oil limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035417U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895680A (en) * | 2015-06-17 | 2015-09-09 | 潍柴动力股份有限公司 | Oil quantity limiting device and oil quantity limiting method for diesel engine and mechanical oil injection pump thereof |
| CN105673283A (en) * | 2016-01-28 | 2016-06-15 | 山东康达精密机械制造有限公司 | Low-pressure oil cavity pressurizing device for inline distribution type electronic control injection pump |
-
2013
- 2013-01-14 CN CN 201320018605 patent/CN203035417U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895680A (en) * | 2015-06-17 | 2015-09-09 | 潍柴动力股份有限公司 | Oil quantity limiting device and oil quantity limiting method for diesel engine and mechanical oil injection pump thereof |
| CN105673283A (en) * | 2016-01-28 | 2016-06-15 | 山东康达精密机械制造有限公司 | Low-pressure oil cavity pressurizing device for inline distribution type electronic control injection pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170613 Address after: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee after: China Faw Co.,Ltd. Address before: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee before: CHINA FAW CORP LTD WUXI FUEL INJECTION EQUIPMENT RES INST,CHINA FIRST AUTOMOBILE WORKS |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
|
| CX01 | Expiry of patent term |