CN212376773U - Precise constant temperature control box for engine fuel injection pump - Google Patents
Precise constant temperature control box for engine fuel injection pump Download PDFInfo
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- CN212376773U CN212376773U CN202020429382.0U CN202020429382U CN212376773U CN 212376773 U CN212376773 U CN 212376773U CN 202020429382 U CN202020429382 U CN 202020429382U CN 212376773 U CN212376773 U CN 212376773U
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Abstract
The utility model discloses an accurate thermostatic control case of engine injection pump, the oil tank comprises an oil tank, be provided with the oil pump on the oil tank, the oil pump is through connecting the proportional valve and connecting cold oil bucket respectively and hot oil bucket, the one end connection hybrid joint of proportional valve is kept away from to cold oil bucket, the one end connection hybrid joint of proportional valve is kept away from to hot oil bucket, hybrid joint passes through VE distribution pump and connects the oil tank, be provided with return oil temperature sensor between VE distribution pump and the oil tank, be provided with speed sensor on the VE distribution pump, cold oil bucket is connected with refrigerating system, hot oil bucket is connected with heating system, the device compact structure, small, the temperature response is fast, control accuracy is high.
Description
Technical Field
The utility model belongs to industry accuse temperature field especially relates to an accurate thermostatic control box of engine injection pump.
Background
With the rapid development of the automobile industry, the emission requirement of an engine is improved, the detection on a heart oil injection pump of the engine is higher and higher correspondingly, the oil quantity detection precision of the oil injection pump is inevitably affected due to the change of temperature, and particularly, the detection on a distributed rotor pump (VE pump) has higher and higher requirements on the precision of oil return constant temperature control during factory debugging.
Because the oil pump needs to be debugged repeatedly at different rotating speeds, the heating value of the oil pump is changed along with the continuous change of the debugging rotating speed, the oil return temperature is higher than the set constant temperature precision range when the rotating speed is changed from low rotating speed to high rotating speed (the heating value is increased instantaneously), and the oil return temperature is lower than the set constant temperature precision range when the rotating speed is changed from high rotating speed to low rotating speed (the heating value is decreased instantaneously).
At present, two open oil tanks are commonly adopted in China, hot oil and cold oil are provided by means of electric heating and direct refrigeration of a compressor, and the oil tanks are large in size, low in temperature reaction speed and poor in temperature control precision. The distribution and supply of cold and hot oil are controlled by a common electromagnetic valve, the temperature response speed is slow along with the change of the rotating speed, and pressure fluctuation occurs when cold and hot oil are converted and supplied, so that the oil return temperature control precision of the pump is low, and the pressure fluctuation of a pump cavity is large.
Disclosure of Invention
The utility model aims at providing an engine injection pump precision thermostatic control box in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a precise thermostatic control box of engine injection pump, includes oil tank 9, is provided with oil pump 8 on the oil tank 9, cold oil bucket 4 and hot oil bucket 5 are connected respectively through connecting proportional valve 6 to oil pump 8, the one end connection hybrid 3 of proportional valve 6 is kept away from to cold oil bucket 4, the one end connection hybrid 3 of proportional valve 6 is kept away from to hot oil bucket 5, hybrid 3 connects oil tank 9 through VE dispensing pump 2, be provided with return oil temperature sensor 1 between VE dispensing pump 2 and the oil tank 9, be provided with speed sensor 13 on the VE dispensing pump 2, cold oil bucket 4 is connected with refrigerating system 401, hot oil bucket 5 is connected with heating system 10.
Preferably, the refrigeration system 401 includes a coolant, an evaporator, and the coolant is piped from the evaporator to a coolant reservoir to be cooled and circulated back to the evaporator.
Preferably, the heating system 10 includes a heater.
Preferably, a pressure regulating valve 7 is arranged between the oil pump 8 and the proportional valve 6.
Preferably, be provided with cold temperature sensor 11 between cold oil drum 4 and hybrid joint 3.
Preferably, a thermal temperature sensor 12 is arranged between the hot oil barrel 5 and the mixing joint 3.
The utility model has the advantages that:
the equipment realizes the precise constant temperature control of the temperature of an oil return port of the VE dispensing pump by changing the oil temperature of the oil supply port. The automatic tracking and precise control are carried out through the hot oil temperature, the cold oil temperature, the proportional valve, the return oil temperature, the rotating speed of the oil pump and the like. The device has the advantages of greatly improving the response speed and the constant temperature control precision of the oil return temperature, improving the pressure fluctuation of the pump cavity, along with compact structure, small volume, fast temperature response and high control precision.
Drawings
Fig. 1 is a schematic structural diagram of a precise thermostatic control box of an engine fuel injection pump.
Detailed Description
The technical scheme of the utility model is further described with the attached drawings:
the utility model provides a precise thermostatic control box of engine injection pump, includes oil tank 9, is provided with oil pump 8 on the oil tank 9, cold oil bucket 4 and hot oil bucket 5 are connected respectively through connecting proportional valve 6 to oil pump 8, the one end connection hybrid 3 of proportional valve 6 is kept away from to cold oil bucket 4, the one end connection hybrid 3 of proportional valve 6 is kept away from to hot oil bucket 5, hybrid 3 connects oil tank 9 through VE dispensing pump 2, be provided with return oil temperature sensor 1 between VE dispensing pump 2 and the oil tank 9, be provided with speed sensor 13 on the VE dispensing pump 2, cold oil bucket 4 is connected with refrigerating system 401, hot oil bucket 5 is connected with heating system 10.
In this embodiment, the refrigeration system 401 preferably includes a coolant, an evaporator, and the coolant is piped from the evaporator to a coolant reservoir to be cooled and circulated back to the evaporator.
In this embodiment, the heating system 10 preferably includes a heater.
In the present embodiment, a pressure regulating valve 7 is preferably provided between the oil pump 8 and the proportional valve 6.
In this embodiment, it is preferable that a cold temperature sensor 11 is arranged between the cold oil drum 4 and the mixing joint 3.
In this embodiment, it is preferable that a thermal temperature sensor 12 is disposed between the hot oil drum 5 and the mixing joint 3.
The equipment realizes precise constant temperature control of the temperature of an oil return port of the VE distribution pump by changing the oil temperature of the oil supply port. The temperature of hot oil, the temperature of cold oil, a proportional valve, the temperature of return oil, the rotating speed of an oil pump and the like are tracked and precisely controlled. Greatly improving the response speed of the oil return temperature and the constant temperature control precision. While improving pressure fluctuations in the pump chamber.
The oil pump leads to the oil tank to absorb oil, enter the proportional valve through the pressure-regulating valve, the rotational speed along with the oil pump constantly changes, the calorific capacity of the oil pump also changes along with it, the sensor detects the oil outlet temperature of the pump, when the temperature rises or drops, the proportional valve acts, will control hot oil and cold oil to supply into the mixing joint, the oil after mixing gets into the pump chamber, because the pump needs to test under different rotational speeds, its calorific capacity also constantly changes along with it, in order to guarantee the stability and the control accuracy of oil outlet temperature, through carrying out the tracking control to the change of hot oil temperature, cold oil temperature and rotational speed of pump, greatly improve the temperature and respond to speed and control accuracy, the device compact structure, small, the temperature response is fast, the control accuracy is high.
Finally, it should be noted that:
the skilled person can, with reference to the present disclosure, carry out the method and carry out its application, it being expressly noted that all similar substitutes and modifications apparent to the skilled person are deemed to be included within the present invention. The method and application of the present invention have been described in terms of preferred embodiments, and it will be apparent to those skilled in the art that the techniques of the present invention may be practiced and used without departing from the spirit and scope of the present invention by modifying or otherwise appropriately changing or combining the various methods and applications of the present invention.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides a precise thermostatic control box of engine injection pump which characterized in that:
including oil tank (9), be provided with oil pump (8) on oil tank (9), cold oil bucket (4) and hot oil drum (5) are connected respectively through connecting proportional valve (6) in oil pump (8), the one end that proportional valve (6) were kept away from in cold oil bucket (4) is connected hybrid (3), hybrid (3) is connected to the one end that proportional valve (6) were kept away from in hot oil drum (5), hybrid (3) connect oil tank (9) through VE distribution pump (2), be provided with return oil temperature sensor (1) between VE distribution pump (2) and oil tank (9), be provided with tachometric sensor (13) on VE distribution pump (2), cold oil bucket (4) are connected with refrigerating system (401), hot oil bucket (5) are connected with heating system (10).
2. The precise thermostatic control box of the injection pump of the engine of claim 1, characterized in that: the refrigeration system (401) includes a coolant, an evaporator, and the coolant is piped from the evaporator to a coolant reservoir to be cooled and circulated back to the evaporator.
3. The precise thermostatic control box of the injection pump of the engine of claim 1, characterized in that: the heating system (10) comprises a heater.
4. The precise thermostatic control box of the injection pump of the engine of claim 1, characterized in that: and a pressure regulating valve (7) is arranged between the oil pump (8) and the proportional valve (6).
5. The precise thermostatic control box of the injection pump of the engine of claim 1, characterized in that: a cold temperature sensor (11) is arranged between the cold oil barrel (4) and the mixing joint (3).
6. The precise thermostatic control box of the injection pump of the engine of claim 1, characterized in that: a thermal temperature sensor (12) is arranged between the hot oil barrel (5) and the mixing joint (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020429382.0U CN212376773U (en) | 2020-03-28 | 2020-03-28 | Precise constant temperature control box for engine fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020429382.0U CN212376773U (en) | 2020-03-28 | 2020-03-28 | Precise constant temperature control box for engine fuel injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212376773U true CN212376773U (en) | 2021-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020429382.0U Active CN212376773U (en) | 2020-03-28 | 2020-03-28 | Precise constant temperature control box for engine fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212376773U (en) |
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2020
- 2020-03-28 CN CN202020429382.0U patent/CN212376773U/en active Active
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