CN112857810A - Engine oil external circulation control system and method for engine test - Google Patents
Engine oil external circulation control system and method for engine test Download PDFInfo
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- CN112857810A CN112857810A CN202110052109.XA CN202110052109A CN112857810A CN 112857810 A CN112857810 A CN 112857810A CN 202110052109 A CN202110052109 A CN 202110052109A CN 112857810 A CN112857810 A CN 112857810A
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- 239000010705 motor oil Substances 0.000 title claims abstract description 199
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 239000003921 oil Substances 0.000 claims abstract description 280
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 230000008569 process Effects 0.000 claims abstract description 32
- 230000001050 lubricating effect Effects 0.000 claims abstract description 8
- 239000010721 machine oil Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine oil external circulation control system and a control method for an engine test, wherein the control system comprises: the engine oil external circulation loop with the oil pump is formed by connecting an engine oil pan, a first control valve, a second variable frequency pump set, a temperature control unit, a flowmeter and the engine oil pan sequentially through a pipe connecting pipeline; the inorganic oil pump engine oil external circulation loop is formed by connecting the engine oil pan, the second control valve, the first variable frequency pump set, the oil storage tank, the second variable frequency pump set, the temperature control unit, the flowmeter and the engine main oil gallery in sequence through a pipe connecting pipeline; the control method comprises an engine oil external circulation control method with an engine oil pump under the normal working state of the engine and an engine oil external circulation control method without the engine oil pump under the state of removing the engine oil pump. The invention can realize real-time monitoring of the liquid level position of the oil pan of the engine in the test process of the engine and can ensure that the state of the lubricating system is unchanged before and after the oil pump is disassembled.
Description
Technical Field
The invention belongs to the technical field of oil lubrication of engine testing machines, and particularly relates to an engine oil external circulation control system and method for an engine test.
Background
In order to meet the fuel consumption target and the emission limit value, a mechanical friction loss test of the engine is required in the development process of a new engine product so as to determine the mechanical loss level of the whole engine and parts of the engine, and the mechanical loss level is used for carrying out low-friction design on the engine.
In the mechanical friction loss test process of the engine, an engine oil circulating system needs to be externally connected so as to accurately control the state of an engine oil lubricating system in the test process. The oil level position of an oil bottom shell of the engine is an important factor influencing the friction state of the engine, and the oil circulating system of the existing engine mechanical friction loss test bed does not consider the influence of the oil level position of the oil bottom shell, so that the reliability of the mechanical friction test result of the engine is low.
In addition, in the process of the mechanical friction loss test of the engine, the oil pump of the engine is required to be dismounted, and the mechanical loss data of the engine oil pump driving is obtained by measuring the change of the driving torque of the engine before and after the oil pump is dismounted. In the prior art, the loss measurement tests of the oil pump driving machinery all adopt part tests, and the loss measurement tests of the oil pump driving machinery are not carried out in the state of the whole engine. Therefore, when the engine has no oil pump state and is used for measuring the driving torque of the engine, the consistency of the states of the lubricating systems before and after the oil pump of the engine is dismounted is difficult to ensure, and the accuracy of the loss measurement test data of the oil pump driving machinery is lower.
Disclosure of Invention
Aiming at the defects in the prior art, the invention discloses an engine oil external circulation control system and an engine oil external circulation control method for an engine test, which realize the accurate control of the state of an engine lubricating system in the engine test process, monitor the liquid level position of an engine oil bottom shell in real time and ensure that the state of the lubricating system is unchanged before and after the engine oil pump is dismantled. The technical scheme of the invention is as follows by combining the attached drawings of the specification:
in one aspect, the invention discloses an engine oil external circulation control system for an engine test, comprising: the engine oil external circulation loop with the oil pump is formed by connecting an engine oil pan 2, a first control valve 5, a second variable frequency pump set 9, a temperature control unit 10, a flowmeter 11 and the engine oil pan 2 sequentially through a pipe connecting pipeline; and an inorganic oil pump engine oil external circulation loop formed by sequentially connecting the engine oil pan 2, the second control valve 6, the first variable frequency pump set 7, the oil storage tank 8, the second variable frequency pump set 9, the temperature control unit 10, the flowmeter 11 and the engine main oil gallery 13 through a pipe connecting pipeline.
Further, the engine oil pan 2 is connected with the liquid level monitor 3 through an external communicating pipe, and the liquid level height of oil in the engine oil pan 2 is monitored through the liquid level monitor 3.
Further, the engine oil pan 2 is connected with the connecting pipeline through a liquid level limiting pipe 4.
Furthermore, the bottom of the engine oil pan 2 is provided with an oil outlet through hole 15, an oil outlet connecting pipe fitting 14 is fixed on the inner edge of the oil outlet through hole 15, the liquid level limiting pipe 4 is connected to the inner side of the oil outlet connecting pipe fitting 14 in a sealing mode, and the axial relative position between the liquid level limiting pipe 4 and the oil connecting pipe fitting 14 is adjustable.
Furthermore, through threaded connection between the liquid level limiting pipe 4 and the oil outlet connecting pipe fitting 14, the axial relative position between the liquid level limiting pipe 4 and the oil outlet connecting pipe fitting 14 is adjusted by screwing the liquid level limiting pipe 4, and then the length of the liquid level limiting pipe 4 extending into the engine oil pan 2 is adjusted.
Further, the first control valve 5 and the second control valve 6 are manual control valves or electric control valves.
Further, the temperature control unit 10 includes: the temperature acquisition element, the temperature controller and the temperature control execution element;
the temperature acquisition element acquires the temperature of the engine oil in the engine oil loop flowing through and sends the acquired temperature signal to the temperature controller, the temperature controller sends a corresponding control signal to the temperature control execution element after processing the received temperature signal, and the temperature control execution element is controlled to work, so that the temperature of the engine oil flowing through is increased or decreased, and the external circulation temperature of the engine oil in the control loop is kept within a preset range.
Furthermore, an oil supply port 16 is formed at one end of the oil supply adaptor 12, and an internal thread for connecting with a connecting pipeline is formed on the inner side wall of the oil supply port 16;
an oil inlet 17 is coaxially formed at the other end of the oil supply adaptor 12 and the oil supply port 16;
the oil inlet 17 is butted with an inlet of the main oil gallery 13 of the engine, and the aperture of the oil inlet 17 is smaller than that of the oil supply port 16;
a temperature sensor 18 is arranged at a position, corresponding to the oil inlet 17, on the oil supply adapter 12;
a pressure sensor 19 is mounted at another position on the oil supply adaptor 12 corresponding to the oil inlet 17.
On the other hand, the invention also discloses a control method of the engine oil external circulation control system for the engine test, and the engine oil external circulation control method comprises the following steps: the external circulation control method of the machine oil with the oil pump under the normal working state of the engine and the external circulation control method of the machine oil without the oil pump under the state of dismantling the oil pump of the engine;
the specific process of the external circulation control of the engine oil with the engine oil pump is as follows:
connecting the tail end of a connecting pipeline connected with a flow meter 11 to an engine oil pan 2, opening a first control valve 5, closing a second control valve 6, enabling an engine oil pump in an engine body 1 to normally work, enabling engine oil in the engine oil pan 2 to flow out through a liquid level limiting pipe 4 under the action of a second variable frequency pump set 9, enabling the engine oil to sequentially flow through the first control valve 5, the second variable frequency pump set 9, a temperature control unit 10 and the flow meter 11 through the connecting pipeline, enabling the engine oil to flow back to the engine oil pan 2, and realizing test tests under different rotating speed working conditions by controlling the rotating speed of the engine;
the specific process of the oil external circulation control of the oilless pump is as follows:
the tail end of a connecting pipeline connected with a flow meter 11 is connected to the inlet position of an engine main oil gallery 13 through an oil supply adapter 12, the first control valve 5 is closed, the second control valve 6 is opened, the engine oil pump in the engine body 1 is removed, under the action of the first variable frequency pump group 7, the engine oil in the oil pan 2 of the engine flows out through the liquid level limiting pipe 4, flows through a second control valve 6, a first variable frequency pump set 7, an oil storage tank 8, a second variable frequency pump set 9, a temperature control unit 10 and a flowmeter 11 in sequence through connecting pipelines and flows back to an engine main oil gallery 13, by controlling the working frequency of the second variable frequency pump unit 9, the oil pressure in the oil external circulation loop of the oilless pump reaches the oil pressure in the oil external circulation loop under different rotation speed working conditions before the oil pump is removed, so that the oil pressure of the main oil duct 13 of the engine under different rotation speed working conditions is consistent with the lubrication state before and after the oil pump is removed.
Further, in the external circulation control process of the engine oil with the engine oil pump and the external circulation control process of the engine oil without the engine oil pump, the liquid level monitor 3 connected with the engine oil pan 2 is used for monitoring the oil level height in the engine oil pan 2 so as to control the oil pumping amount of the second variable frequency pump group 9, further control the oil amount flowing back to the engine oil pan 2, and ensure that the oil level in the engine oil pan 2 is kept constant.
Compared with the prior art, the invention has the beneficial effects that:
1. the engine oil external circulation control system and the engine oil external circulation control method for the engine test can realize control of the state of an engine lubricating system in the engine test process and realize accurate control of the pressure, flow and temperature of the engine oil.
2. When the engine oil pump of the engine works normally, the engine oil is pumped out from the oil pan of the engine through a variable frequency pump set and flows back to the oil pan of the engine; when an engine oil pump of the engine is dismantled, the engine oil flows back to a main oil duct of the engine through another variable frequency pump set; different engine oil circulation loops before and after the engine oil pump is dismounted can be realized, normal oil supply lubrication of the engine is maintained, and the state of a lubrication system before and after the engine oil pump is dismounted can be ensured to be unchanged.
3. The engine oil external circulation control system and the control method for the engine test provided by the invention have the advantages that the liquid level position of the oil pan of the engine is monitored in real time, the oil level limiting height of the oil pan is controlled by adjusting the rotatable liquid level limiting pipe, the liquid level position of the oil pan of the engine is monitored in real time by the liquid level monitor in the test process, the flow rate of the engine oil is controlled by adjusting the working frequency of the variable frequency pump set for returning the oil, the constant liquid level position of the oil pan of the engine in the test process is maintained, and the influence of the change of the liquid level position of the engine oil on.
Drawings
FIG. 1 is a schematic structural diagram of an engine oil external circulation control system for engine tests in a normal working state of an engine.
FIG. 2 is a schematic structural diagram of the external engine oil circulation control system for the engine test in the state that the engine oil pump is removed from the engine.
FIG. 3 is a schematic view of an installation structure of a liquid level limiting pipe in the engine oil external circulation control system for the engine test according to the present invention.
Fig. 4 is a schematic view of an installation structure of an oil supply adapter in the engine oil external circulation control system for the engine test according to the present invention.
In the figure:
the engine comprises an engine body 1, an engine oil sump 2, a liquid level monitor 3, a liquid level limiting pipe 4, a first control valve 5, a second control valve 6, a first frequency conversion pump group 7, an oil storage tank 8, a second frequency conversion pump group 9, a temperature control unit 10, a flow meter 11, an oil supply adapter 12, an engine main oil duct 13, an oil outlet connecting pipe fitting 14, an oil outlet through hole 15, an oil supply port 16, an oil inlet 17, a temperature sensor 18 and a pressure sensor 19.
Detailed Description
For clearly and completely describing the technical scheme and the specific working process thereof, the specific implementation mode of the invention is as follows by combining the attached drawings of the specification:
in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The first embodiment is as follows:
the embodiment of the invention discloses an engine oil external circulation control system for an engine test, which comprises the following components in percentage by weight as shown in figures 1 and 2: the system comprises an engine body 1, an engine oil pan 2, a liquid level monitor 3, a liquid level limiting pipe 4, a first control valve 5, a second control valve 6, a first variable frequency pump set 7, an oil storage tank 8, a second variable frequency pump set 9, a temperature control unit 10, a flowmeter 11, an oil supply adapter 12 and a plurality of connecting pipelines; the engine oil external circulation control system is connected to form an engine oil external circulation loop with the engine oil pump and an engine oil external circulation loop without the engine oil pump according to the normal working state of the engine oil pump and the state of an engine oil pump without the engine oil pump.
As shown in fig. 1, the engine oil pan 2, the first control valve 5, the second variable frequency pump set 9, the temperature control unit 10, the flow meter 11 and the engine oil pan 2 are sequentially connected through a pipe connecting pipeline to form an "external oil circulation loop with an oil pump";
as shown in fig. 2, the engine oil pan 2, the second control valve 6, the first variable frequency pump unit 7, the oil storage tank 8, the second variable frequency pump unit 9, the temperature control unit 10, the flow meter 11 and the engine main oil gallery 13 in the engine body 1 are connected in sequence through the pipe connecting pipeline to form an "oil external circulation loop of the oil pump without the oil pump".
As shown in fig. 1 and 2, the engine oil pan 2 is further connected with the liquid level monitor 3 through an external connection communication pipe, and the lowest height of the oil level in the engine oil pan 2 is monitored through the liquid level monitor 3 by utilizing the principle of a U-shaped communicating vessel, so that the oil level in the engine oil pan 2 is not lower than the preset lowest liquid level in real time under the working state of the engine.
As shown in fig. 1 and 2, in the "external circulation loop with oil pump oil" and the "external circulation loop without oil pump oil", a liquid level limiting pipe 4 is arranged at the bottom of the engine oil pan 2, and the engine oil pan 2 is connected with a connecting pipeline through the liquid level limiting pipe 4;
as shown in fig. 3, an oil outlet through hole 15 is formed at the bottom of the engine oil pan 2, an oil outlet connecting pipe 14 is coaxially welded on the inner edge of the oil outlet through hole 15, and the oil outlet connecting pipe 14 is perpendicular to the bottom of the engine oil pan 2; the inner side wall of the oil outlet connecting pipe fitting 14 is provided with threads, the outer side wall of the liquid level limiting pipe 4 is provided with threads matched with the threads on the inner side wall of the oil outlet connecting pipe fitting 14, the outer side wall of the liquid level limiting pipe 4 is in threaded connection with the inner side wall of the oil outlet connecting pipe fitting 14, so that the liquid level limiting pipe 4 is perpendicular to the bottom of the engine oil pan 2, the axial relative position of the liquid level limiting pipe 4 relative to the oil outlet connecting pipe fitting 14 can be controlled by screwing the liquid level limiting pipe 4, and the length of the liquid level limiting pipe 4 extending into the engine oil pan 2 is adjusted; the limiting control on the height of the oil level in the engine oil pan 2 can be realized by adjusting the length of the liquid level limiting pipe 4 extending into the engine oil pan 2, when the height of the oil level in the engine oil pan 2 is higher than the top of the liquid level limiting pipe 4, the oil in the engine oil pan 2 can smoothly flow into a downstream pipeline through the liquid level limiting pipe 4, and when the height of the oil level in the engine oil pan 2 is lower than the top of the liquid level limiting pipe 4, the oil in the engine oil pan 2 can not flow into the downstream pipeline through the liquid level limiting pipe 4; therefore, the length of the liquid level limiting pipe 4 extending into the engine oil pan 2 is adjusted by screwing the liquid level limiting pipe 4, and sufficient engine oil in the engine oil pan 2 can be guaranteed to perform a test.
As shown in fig. 1, in the "external circulation loop of machine oil pump oil", the first control valve 5 is provided with a control switch, and a manual switch or an electric control switch can be adopted, when the engine machine oil pump works normally, the first control valve 5 is controlled to be opened, the second control valve 6 is controlled to be closed, under the action of the second variable frequency pump group 9, the machine oil in the engine oil pan 2 is pumped into the "external circulation loop of machine oil pump oil", the machine oil in the engine oil pan 2 flows through the liquid level limiting pipe 4, the first control valve 5, the second variable frequency pump group 9, the temperature control unit 10 and the flow meter 11 in sequence and then flows back to the engine oil pan 2, and in the process, the machine oil in the engine oil pan 2 is pumped into the engine oil channel under the normal working state of the machine oil pump, so as to lubricate the machine oil;
as shown in fig. 1, in the "external circulation loop with oil pump oil", the oil level position in the engine oil pan 2 is monitored by the liquid level monitor 3, and the amount of oil flowing back to the engine oil pan 2 through the second variable frequency pump set 9 is controlled, so as to ensure that the oil level position in the engine oil pan 2 is constant in the test process.
As shown in fig. 2, in the "oil external circulation loop without oil pump", similarly to the first control valve 5, the second control valve 6 is provided with a control switch, and a manual switch or an electric control switch may be adopted, when the engine oil pump is removed, the first control valve 5 is controlled to be closed, the second control valve 6 is controlled to be opened, under the action of the first variable frequency pump group 7, the oil in the engine oil pan 2 is pumped into the "oil external circulation loop without oil pump", and the oil in the engine oil pan 2 directly flows back to the main oil gallery 13 of the engine after sequentially flowing through the liquid level limiting pipe 4, the second control valve 6, the first variable frequency pump group 7, the oil storage tank 8, the second variable frequency pump group 9, the temperature control unit 10 and the flow meter 11, so as to lubricate the engine oil;
as shown in fig. 2, in the "oil external circulation circuit of the oil-free pump", an oil storage tank 8 provided in a component between the first variable frequency pump unit 7 and the second variable frequency pump unit 9 is used as an oil buffer space to prevent an excessive pressure at an oil suction port of the downstream second variable frequency pump unit 9;
as shown in fig. 2, in the "oil external circulation loop without the oil pump", the second variable frequency pump group 9 is matched with the liquid level monitor 3, so that the oil level position of the oil in the oil pan 2 of the engine is constant in the test process, and the operating frequency of the second variable frequency pump group 9 is controlled, so that the oil pressure in the oil external circulation loop without the oil pump, from which the oil pump is removed, can reach the oil pressure in the oil external circulation loop under each rotation speed condition before the oil pump is removed, so that the oil pressure in the oil main oil gallery 13 of the engine is accurately controlled, and the oil pressure in the oil main oil gallery 13 of the engine under different rotation speed conditions is ensured to be consistent in the lubrication state before and after the oil pump is removed.
As shown in fig. 1 and 2, in the "with-engine oil pump oil external circulation circuit" and the "without-engine oil pump oil external circulation circuit", the temperature control unit 10 is configured to control an oil external circulation temperature in the circuit to be maintained within a preset range, and the temperature control unit 10 includes: the temperature acquisition element, the temperature controller and the temperature control execution element; the temperature acquisition element acquires the temperature of engine oil in the engine oil loop flowing through and sends the acquired temperature signal to the temperature controller, the temperature controller sends a corresponding control signal to the temperature control execution element after processing the received temperature signal, the temperature control execution element is controlled to work, the temperature of the engine oil flowing through is increased or decreased, and the external circulation temperature of the engine oil in the control loop is kept within a preset range.
As shown in fig. 1 and 2, in the "with-engine oil external circulation circuit" and the "without-engine oil external circulation circuit", the flow meter 11 is used to measure the flow rate of the internal-circuit oil external circulation flowing therethrough.
As shown in fig. 2, in the "oil outside circulation circuit of the oil-less pump", a connection pipeline connected to a flow meter 11 is connected to an inlet of an engine main oil gallery 13 through an oil supply adaptor 12; as shown in fig. 4, an oil supply port 16 is formed at one end of the oil supply adaptor 12, an internal thread for connecting with a connecting pipeline is formed on the inner side wall of the oil supply port 16, an oil inlet 17 is formed at the other end of the oil supply adaptor 12 coaxially with the oil supply port 16, the oil inlet 17 is butted with an inlet of the main oil passage 13 of the engine, and the aperture of the oil inlet 17 is smaller than that of the oil supply port 16, so as to establish oil pressure entering the main oil passage 13 of the engine; a temperature sensor 18 is arranged at a position, corresponding to the oil inlet 17, on the oil supply adaptor 12, so that the temperature of the engine oil at the inlet of the main oil duct 13 of the engine can be monitored in real time and is matched with the temperature control unit 10, and the temperature of the engine oil in the main oil duct 13 of the engine can be accurately controlled; and a pressure sensor 19 is arranged at the other position, corresponding to the oil inlet 17, on the oil supply adapter 12 so as to monitor the oil pressure at the inlet position of the main oil gallery 13 of the engine in real time.
Example two:
the embodiment II of the invention discloses an engine oil external circulation control method for an engine test, which is realized by the engine oil external circulation control system for the engine test in the embodiment I, and comprises the following steps: the external circulation control method of the machine oil with the oil pump under the normal working state of the engine and the external circulation control method of the machine oil without the oil pump under the state of dismantling the oil pump of the engine; wherein:
the specific process of the external circulation control of the engine oil with the engine oil pump is as follows:
connecting the tail end of a connecting pipeline connected with a flow meter 11 to an engine oil pan 2, opening a first control valve 5, closing a second control valve 6, enabling an engine oil pump in an engine body 1 to work normally, enabling engine oil in the engine oil pan 2 to flow out through a liquid level limiting pipe 4 under the action of a second variable frequency pump set 9, sequentially flowing through the first control valve 5, the second variable frequency pump set 9, a temperature control unit 10 and the flow meter 11 through the connecting pipeline, and flowing back to the engine oil pan 2;
in the specific process of the external circulation control of the engine oil with the engine oil pump, the test tests under different rotating speed working conditions are realized by controlling the rotating speed of the engine body 1;
in the specific process of the oil external circulation control with the oil pump, the temperature of the oil in the external circulation loop is regulated through the temperature control unit 10, and the flow of the flowing oil is detected through the flowmeter 11;
in the specific process of the external circulation control of the engine oil with the engine oil pump, the length of the liquid level limiting pipe 4 extending into the engine oil bottom shell 2 is adjusted by screwing the liquid level limiting pipe 4, so that the engine oil in the engine oil bottom shell 2 is sufficient;
in the specific process of the oil external circulation control with the oil pump, the liquid level monitor 3 is used for monitoring the oil level in the engine oil pan 2, the oil pumping amount of the second variable frequency pump group 9 is controlled, the oil amount flowing back to the engine oil pan 2 is further controlled, and the oil level in the engine oil pan 2 is ensured to be constant.
The specific process of the oil external circulation control of the oilless pump is as follows:
connecting the tail end of a connecting pipeline connected with a flowmeter 11 to the inlet position of an engine main oil duct 13 through an oil supply adapter 12, closing a first control valve 5, opening a second control valve 6, removing an engine oil pump in an engine body 1, allowing engine oil in an engine oil pan 2 to flow out through a liquid level limiting pipe 4 under the action of a first variable frequency pump set 7, sequentially flowing through the second control valve 6, the first variable frequency pump set 7, an oil storage tank 8, a second variable frequency pump set 9, a temperature control unit 10 and the flowmeter 11 through the connecting pipeline, and flowing back to the engine main oil duct 13 through the oil supply adapter 12;
in the specific process of the oil external circulation control with the oil pump, the working frequency of the second variable frequency pump set 9 is controlled, so that the oil pressure in the oil external circulation loop without the oil pump for removing the oil pump of the engine reaches the oil pressure in the oil external circulation loop under each rotating speed working condition before the oil pump is removed, the pressure sensor 19 in the oil supply adapter 12 is used for detecting the oil pressure at the inlet position of the main oil duct 13 of the engine, the accurate control of the oil pressure in the main oil duct 13 of the engine is realized, and the oil pressure of the main oil duct 13 of the engine under different rotating speed working conditions and the lubricating states of the main oil duct 13 of the engine before and after the oil pump is removed;
in the specific process of the oil external circulation control with the oil pump, the temperature of the oil in the external circulation loop is regulated through the temperature control unit 10, and the temperature of the oil at the inlet position of the main oil duct 13 of the engine is detected through the temperature sensor 18 in the oil supply adapter 12, so that the accurate control of the temperature of the oil in the main oil duct 13 of the engine is realized;
in the specific process of the external circulation control of the engine oil with the engine oil pump, the flow of the engine oil flowing through the flowmeter 11 is detected;
in the specific process of the external circulation control of the engine oil with the engine oil pump, the length of the liquid level limiting pipe 4 extending into the engine oil bottom shell 2 is adjusted by screwing the liquid level limiting pipe 4, so that the engine oil in the engine oil bottom shell 2 is sufficient;
in the specific process of the oil external circulation control with the oil pump, the liquid level monitor 3 is used for monitoring the oil level in the engine oil pan 2, the oil pumping amount of the second variable frequency pump group 9 is controlled, the oil amount flowing back to the engine oil pan 2 is further controlled, and the oil level in the engine oil pan 2 is ensured to be constant.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an engine oil extrinsic cycle control system for engine test which characterized in that:
the method comprises the following steps: the engine oil external circulation loop with the oil pump is formed by sequentially connecting an engine oil pan (2), a first control valve (5), a second variable frequency pump set (9), a temperature control unit (10), a flow meter (11) and the engine oil pan (2) through a pipe connecting pipeline; and the inorganic oil pump machine oil external circulation loop is formed by connecting the engine oil pan (2), the second control valve (6), the first variable frequency pump set (7), the oil storage tank (8), the second variable frequency pump set (9), the temperature control unit (10), the flowmeter (11) and the engine main oil gallery (13) in sequence through a pipe connecting pipeline.
2. The oil outside-circulation control system for the engine test as set forth in claim 1, wherein:
the engine oil pan (2) is connected with the liquid level monitor (3) through an external communicating pipe, and the liquid level height of oil in the engine oil pan (2) is monitored through the liquid level monitor (3).
3. The oil outside-circulation control system for the engine test as set forth in claim 1, wherein:
the engine oil pan (2) is connected with the connecting pipeline through a liquid level limiting pipe (4).
4. The oil outside-circulation control system for the engine test as set forth in claim 3, wherein:
the oil pan of the engine (2) is provided with an oil outlet through hole (15) at the bottom, an oil outlet connecting pipe fitting (14) is fixed on the inner edge of the oil outlet through hole (15), the liquid level limiting pipe (4) is connected to the inner side of the oil outlet connecting pipe fitting (14) in a sealing mode, and the axial relative position between the liquid level limiting pipe (4) and the oil outlet connecting pipe fitting (14) is adjustable.
5. The oil recirculation control system for engine testing of claim 4, wherein:
the oil level limiting pipe (4) is connected with the oil outlet connecting pipe fitting (14) through threads, the axial relative position between the oil level limiting pipe (4) and the oil outlet connecting pipe fitting (14) is adjusted through screwing the liquid level limiting pipe (4), and then the length of the liquid level limiting pipe (4) extending into the engine oil pan (2) is adjusted.
6. The oil outside-circulation control system for the engine test as set forth in claim 1, wherein:
the first control valve (5) and the second control valve (6) adopt manual control valves or electric control valves.
7. The oil outside-circulation control system for the engine test as set forth in claim 1, wherein:
the temperature control unit (10) comprises: the temperature acquisition element, the temperature controller and the temperature control execution element;
the temperature acquisition element acquires the temperature of the engine oil in the engine oil loop flowing through and sends the acquired temperature signal to the temperature controller, the temperature controller sends a corresponding control signal to the temperature control execution element after processing the received temperature signal, and the temperature control execution element is controlled to work, so that the temperature of the engine oil flowing through is increased or decreased, and the external circulation temperature of the engine oil in the control loop is kept within a preset range.
8. The oil outside-circulation control system for the engine test as set forth in claim 1, wherein:
an oil supply port (16) is formed in one end of the oil supply adapter (12), and an internal thread used for being connected with a connecting pipeline is formed in the inner side wall of the oil supply port (16);
an oil inlet (17) is coaxially formed in the other end of the oil supply adaptor (12) and the oil supply port (16);
the oil inlet (17) is butted with an inlet of the main oil gallery (13) of the engine, and the aperture of the oil inlet (17) is smaller than that of the oil supply port (16);
a temperature sensor (18) is arranged at one position, corresponding to the oil inlet (17), on the oil supply adaptor (12);
and a pressure sensor (19) is arranged at the other position, corresponding to the oil inlet (17), on the oil supply adaptor (12).
9. The control method of an oil outside circulation control system for an engine test as set forth in claim 1, wherein:
the engine oil external circulation control method comprises the following steps: the external circulation control method of the machine oil with the oil pump under the normal working state of the engine and the external circulation control method of the machine oil without the oil pump under the state of dismantling the oil pump of the engine;
the specific process of the external circulation control of the engine oil with the engine oil pump is as follows:
connecting the tail end of a connecting pipeline connected with a flow meter (11) to an engine oil pan (2), opening a first control valve (5), closing a second control valve (6), enabling an engine oil pump in an engine body (1) to normally work, enabling engine oil in the engine oil pan (2) to flow out through a liquid level limiting pipe (4) under the action of a second variable frequency pump set (9), sequentially flowing through the first control valve (5), the second variable frequency pump set (9), a temperature control unit (10) and the flow meter (11) through the connecting pipeline, and flowing back to the engine oil pan (2), and realizing test tests under different rotating speed working conditions by controlling the rotating speed of the engine;
the specific process of the oil external circulation control of the oilless pump is as follows:
the tail end of a connecting pipeline connected with a flow meter (11) is connected to the inlet position of an engine main oil duct (13) through an oil supply adapter (12), a first control valve (5) is closed, a second control valve (6) is opened, the engine oil pump in an engine body (1) is removed, under the action of a first variable frequency pump set (7), the engine oil in an engine oil pan (2) flows out through a liquid level limiting pipe (4), sequentially flows through the second control valve (6), the first variable frequency pump set (7), an oil storage tank (8), a second variable frequency pump set (9), a temperature control unit (10) and the flow meter (11) through the connecting pipeline and flows back to the engine main oil duct (13), and the engine oil pressure in an external circulation loop without the engine oil pump reaches the engine oil pressure in the external circulation loop under different rotating speed working conditions before the engine oil pump is removed by controlling the working frequency of the second variable frequency pump set (9), the engine oil pressure of the engine main oil duct (13) under different rotating speed working conditions and the lubricating states before and after the engine oil pump is detached are consistent.
10. The control method of an oil outside circulation control system for an engine test as set forth in claim 9, wherein:
in the external circulation control process of the engine oil with the oil pump and the external circulation control process of the engine oil without the oil pump, the liquid level height of the engine oil in the engine oil pan (2) is monitored by the liquid level monitor (3) connected with the engine oil pan (2) to control the pump oil amount of the second variable frequency pump set (9), further control the oil amount flowing back to the engine oil pan (2), and ensure that the oil level in the engine oil pan (2) is kept constant.
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| CN202110052109.XA CN112857810A (en) | 2021-01-15 | 2021-01-15 | Engine oil external circulation control system and method for engine test |
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