CN210483937U - Oil pressure control device and common rail engine bench experimental system - Google Patents
Oil pressure control device and common rail engine bench experimental system Download PDFInfo
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- CN210483937U CN210483937U CN201921463499.4U CN201921463499U CN210483937U CN 210483937 U CN210483937 U CN 210483937U CN 201921463499 U CN201921463499 U CN 201921463499U CN 210483937 U CN210483937 U CN 210483937U
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Abstract
The utility model provides an oil pressure control device and common rail engine bench experimental system, oil pressure control device wherein includes pipeline and controller, wherein: the pipeline comprises an oil inlet, an oil outlet and a flow adjustable pipe group connected between the oil inlet and the oil outlet, and an oil pressure sensor is arranged at the oil inlet; the flow adjustable pipe set comprises a main pipe, a first adjusting side pipe and a second adjusting side pipe which are connected in parallel between the oil inlet and the oil outlet, the first adjusting side pipe is provided with an electric control adjusting valve for adjusting the flux of the first side pipe, and the second adjusting side pipe is provided with a variable frequency constant delivery pump for adjusting the flux of the second adjusting side pipe; the oil pressure sensor, the electric control regulating valve and the variable-frequency constant delivery pump are all electrically connected with the controller. The utility model discloses can adjust the oil return oil pressure of common rail engine to the predetermined within range to guarantee the test effect to common rail engine.
Description
Technical Field
The utility model belongs to the technical field of the engine test and specifically relates to an oil pressure control device and common rail engine bench experimental system is related to.
Background
Along with the increasingly severe emission of fuel engines, high-pressure common rail engines are rapidly popularized, the problem of overhigh return oil pressure caused by overlarge return oil amount exists in a bench test, the common rail pressure control is influenced, the state that the return oil is directly decompressed to an oil tank during actual loading cannot be simulated, the delayed injection or inaccurate oil injection amount of an oil injector is easily caused, even the return oil pressure exceeds the rated return oil pressure limit value, the OBD error report is caused, the bench cannot control the engines, and the test is stopped.
In view of the above, it is necessary to control the oil return pressure of the engine to ensure that the oil return pressure is maintained within a predetermined range.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the first aspect of the present invention provides an oil pressure control device, which comprises:
an oil pressure control device, which comprises a pipeline and a controller, wherein:
the pipeline includes oil inlet, oil-out and connects the adjustable nest of tubes of flow between the oil inlet with the oil-out, wherein:
an oil pressure sensor is arranged at the oil inlet;
the flow adjustable pipe set comprises a main pipe, a first adjusting side pipe and a second adjusting side pipe which are connected in parallel between the oil inlet and the oil outlet, the first adjusting side pipe is provided with an electric control adjusting valve for adjusting the flux of the first adjusting side pipe, and the second adjusting side pipe is provided with a variable frequency constant delivery pump for adjusting the flux of the second adjusting side pipe;
the oil pressure sensor, the electric control regulating valve and the variable-frequency constant delivery pump are all electrically connected with the controller.
In some embodiments, a one-way valve is disposed on the main conduit.
In some embodiments, the electrically controlled regulating valve is an adjustable pneumatic one-way pressure regulating valve.
The utility model discloses a second aspect provides a common rail engine bench experimental system, and it includes oil consumption appearance, common rail engine and oil pressure control device, common rail engine includes common rail pressure oil pipe, sprayer pressure release oil pipe and connects common rail pressure oil pipe with sprayer between the sprayer pressure release oil pipe, wherein: an oil outlet of the oil consumption meter is connected to a common rail pressure oil pipe of the common rail engine through an oil outlet pipeline of the oil consumption meter, and a high-pressure oil pump is arranged on the oil outlet pipeline of the oil consumption meter; a pressure relief oil pipe of an oil sprayer of the common rail engine is connected to an oil inlet of the oil pressure control device through an oil return pipeline, and an oil outlet of the oil pressure control device is connected with an oil inlet of the oil consumption instrument through an oil inlet pipeline of the oil consumption instrument; oil pressure control device adopts the utility model discloses the first oil pressure control device who provides of putting.
In some specific embodiments, the fuel consumption meter further comprises a bypass pipe connected between the fuel consumption meter oil outlet pipeline and the fuel consumption meter oil inlet pipeline, and the bypass pipe is provided with a regulating valve.
In some specific embodiments, the oil drain port of the high-pressure oil pump is connected to the oil inlet of the oil pressure control device through a first oil drain pipeline.
In some specific embodiments, the common rail pressure oil pipe is connected to the oil return pipe through a second oil drainage pipe, and a safety valve for controlling the second oil drainage pipe to be opened and closed is arranged on the second oil drainage pipe.
Compared with the prior art, the utility model provides an oil pressure control device and common rail engine bench experimental system can realize the nimble control to common rail engine's return oil pressure to the oil pressure control in the pipeline that will return oil is to predetermined within range, in order to guarantee the test effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are needed in the embodiments and are practical will be briefly described below and will be obvious, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. Wherein the content of the first and second substances,
fig. 1 is a schematic structural view of an oil pressure control device according to the present invention;
fig. 2 is the structural schematic diagram of the common rail engine bench experimental system of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Hydraulic control device
As shown in fig. 1, a first embodiment of the present invention provides an oil pressure control device 4, which includes a pipeline and a controller 41, wherein:
the pipeline includes oil inlet 42, oil-out 43 and connects the adjustable nest of tubes of flow between oil inlet 42 and oil-out 43, wherein: an oil pressure sensor 47 is arranged at the oil inlet 42; the flow adjustable pipe set comprises a main pipe 44, a first adjusting bypass pipe 45 and a second adjusting bypass pipe 46 which are connected in parallel between the oil inlet 42 and the oil outlet 43, an electric control adjusting valve 451 for adjusting the flux of the first bypass pipe 45 is arranged on the first adjusting bypass pipe 45, and a variable frequency constant displacement pump 461 for adjusting the flux of the second adjusting bypass pipe 46 is arranged on the second adjusting bypass pipe 46.
The oil pressure sensor 47, the electric control regulating valve 451 and the variable frequency constant delivery pump 462 are electrically connected to the controller 41.
The operating principle of the oil pressure control device 4 according to the first embodiment is as follows: the controller 41 has a predetermined oil pressure value stored therein. The oil pressure sensor 47 collects an oil pressure value of the oil inlet 42 and transmits an oil pressure value signal to the controller 41, and the controller 41 compares the received oil pressure value of the oil inlet 42 with a predetermined oil pressure value.
When the difference between the oil pressure value from the oil inlet 42 and the predetermined oil pressure value exceeds a predetermined threshold, the controller 41 controls the flux of the second regulating bypass pipe 46 by controlling the operating frequency of the variable-frequency constant displacement pump 462, so as to realize large-amplitude regulation (coarse regulation) of the overall flux of the adjustable pipe group.
When the difference between the oil pressure value from the oil inlet 42 and the predetermined oil pressure value is smaller than the predetermined threshold, the controller 41 controls the opening degree of the electrically controlled regulating valve 451 to control the flux of the first regulating bypass pipe 45, so as to realize small-amplitude regulation (fine regulation) of the overall flux of the adjustable pipe group.
It can be seen that the oil pressure control device 4 that this embodiment provided can realize the coarse adjustment and the fine adjustment of flow to the realization is to the nimble control of the oil pressure of its oil inlet department.
Preferably, the main pipe 44 is provided with a check valve 441, and the check valve 441 can prevent the oil in the main pipe 44 from flowing back to the oil inlet 42.
Optionally, the electronically controlled regulating valve 451 is an adjustable pneumatic one-way pressure regulating valve.
Common rail engine bench experimental system
As shown in fig. 2, a second embodiment of the present invention provides a common rail engine bench experimental system, which includes a fuel consumption meter 1, a common rail engine 3 and an oil pressure control device 4.
Oil pressure control device 4 does the utility model discloses the oil pressure control device that the first aspect provided.
The common rail engine 3 includes a common rail pressure line 31, an injector relief line 32, and an injector 33 connected between the common rail pressure line 31 and the injector relief line 32. An oil outlet of the oil consumption meter 1 is connected to a common rail pressure oil pipe 31 of the common rail engine 3 through an oil consumption meter oil outlet pipeline 2, and a high pressure oil pump 21 is arranged on the oil consumption meter oil outlet pipeline 2. The pressure relief oil pipe 32 of the oil injector of the common rail engine 3 is respectively connected to the oil inlet 42 of the oil pressure control device 4 through the oil return pipe 8, and the oil outlet 43 of the oil pressure control device 4 is connected to the oil inlet of the oil consumption meter 1 through the oil inlet pipe 5 of the oil consumption meter 1.
In the experiment process, under the drive of the high-pressure oil pump 21, the fuel oil flowing through the fuel consumption meter 1 enters the common rail pressure oil pipe 31 of the common rail engine 3 through the fuel consumption meter oil outlet pipeline 2 to realize the oil supply of the fuel injector 33, the fuel oil which is not injected in the fuel injector 33 returns to the oil return pipeline 8 through the fuel injector pressure relief oil pipe 32, enters the oil pressure control device 4 through the oil return pipeline 8, and the fuel oil which is adjusted by the oil pressure control device 4 finally returns to the fuel consumption meter 1 through the oil inlet pipeline 5.
The oil inlet 42 of the oil pressure control device 4 is directly connected to the oil return pipeline 8, so that the oil pressure collected by the oil pressure sensor 47 at the oil inlet 42 is the oil return pressure in the oil return pipeline 8. By adjusting the oil pressure control device 4, the oil pressure (engine return pressure) in the return line 8 can be controlled to a predetermined range, thereby ensuring the test effect on the common rail engine 3.
Optionally, the common rail engine bench experimental system in this embodiment further includes a bypass pipe 6 connected between the oil consumption meter oil outlet pipe 2 and the oil consumption meter oil inlet pipe 5, and the bypass pipe 6 is provided with an adjusting valve 61. By opening the regulating valve 61, part of the fuel in the fuel outlet pipe 2 of the fuel gauge can directly flow back to the fuel gauge 1 through the bypass pipe 6, so that the amount of the fuel entering the common rail pressure fuel pipe 31 is reduced, and the oil pressure in the common rail pressure fuel pipe 31 is reduced.
Optionally, a drain port of the high-pressure oil pump 21 is connected to the oil return pipeline 8 through the first drain pipeline 7.
Optionally, the common rail pressure oil pipe 31 is connected to the oil return pipe 8 through the second oil drainage pipe 9, a safety valve for controlling the second oil drainage pipe 9 to be opened and closed is arranged on the second oil drainage pipe 9, when the oil pressure in the common rail pressure oil pipe 31 exceeds the warning value, the safety valve is opened, and the fuel oil in the common rail pressure oil pipe 31 is drained into the oil return pipe 8 through the second oil drainage pipe 9.
The invention has been described above with a certain degree of particularity and detail. It will be understood by those of ordinary skill in the art that the description of the embodiments is merely exemplary and that all changes that may be made without departing from the true spirit and scope of the present invention are intended to be within the scope of the present invention. The scope of the invention is defined by the appended claims rather than by the foregoing description of the embodiments.
Claims (7)
1. An oil pressure control device, characterized in that, it includes pipeline and controller, wherein:
the pipeline includes oil inlet, oil-out and connects the adjustable nest of tubes of flow between the oil inlet with the oil-out, wherein:
an oil pressure sensor is arranged at the oil inlet;
the flow adjustable pipe set comprises a main pipe, a first adjusting side pipe and a second adjusting side pipe which are connected in parallel between the oil inlet and the oil outlet, the first adjusting side pipe is provided with an electric control adjusting valve for adjusting the flux of the first adjusting side pipe, and the second adjusting side pipe is provided with a variable frequency constant delivery pump for adjusting the flux of the second adjusting side pipe;
the oil pressure sensor, the electric control regulating valve and the variable-frequency constant delivery pump are all electrically connected with the controller.
2. The oil pressure control device according to claim 1, wherein a check valve is provided on the main pipe.
3. The oil pressure control device according to claim 1, wherein the electrically controlled regulator valve is an adjustable pneumatic one-way pressure regulating valve.
4. The utility model provides a common rail engine rack experimental system which characterized in that, it includes oil consumption appearance, common rail engine and oil pressure control device, common rail engine includes common rail pressure oil pipe, sprayer pressure release oil pipe and connects common rail pressure oil pipe with sprayer pressure release oil pipe between the sprayer, wherein:
an oil outlet of the oil consumption meter is connected to a common rail pressure oil pipe of the common rail engine through an oil outlet pipeline of the oil consumption meter, and a high-pressure oil pump is arranged on the oil outlet pipeline of the oil consumption meter;
a pressure relief oil pipe of an oil sprayer of the common rail engine is connected to an oil inlet of the oil pressure control device through an oil return pipeline, and an oil outlet of the oil pressure control device is connected with an oil inlet of the oil consumption instrument through an oil inlet pipeline of the oil consumption instrument;
the oil pressure control device according to any one of claims 1 to 3.
5. The common rail engine bench test system of claim 4, wherein: the oil consumption meter is characterized by further comprising a side pipe connected between the oil outlet pipeline of the oil consumption meter and the oil inlet pipeline of the oil consumption meter, and a regulating valve is arranged on the side pipe.
6. The common rail engine bench test system of claim 4, wherein: and an oil drainage port of the high-pressure oil pump is connected to an oil inlet of the oil pressure control device through a first oil drainage pipeline.
7. The common rail engine bench test system of claim 4, wherein: the common rail pressure oil pipe is connected to an oil return pipeline through a second oil drainage pipeline, and a safety valve for controlling the second oil drainage pipeline to be connected and disconnected is arranged on the second oil drainage pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921463499.4U CN210483937U (en) | 2019-09-04 | 2019-09-04 | Oil pressure control device and common rail engine bench experimental system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921463499.4U CN210483937U (en) | 2019-09-04 | 2019-09-04 | Oil pressure control device and common rail engine bench experimental system |
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| CN210483937U true CN210483937U (en) | 2020-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566389A (en) * | 2019-09-04 | 2019-12-13 | 无锡沃尔福汽车技术有限公司 | Oil pressure control device and common rail engine bench experimental system |
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2019
- 2019-09-04 CN CN201921463499.4U patent/CN210483937U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566389A (en) * | 2019-09-04 | 2019-12-13 | 无锡沃尔福汽车技术有限公司 | Oil pressure control device and common rail engine bench experimental system |
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