CN110530644A - The system and method for bench test engine coolant automatic liquid supply and recycling - Google Patents
The system and method for bench test engine coolant automatic liquid supply and recycling Download PDFInfo
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- CN110530644A CN110530644A CN201910928438.9A CN201910928438A CN110530644A CN 110530644 A CN110530644 A CN 110530644A CN 201910928438 A CN201910928438 A CN 201910928438A CN 110530644 A CN110530644 A CN 110530644A
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- 239000007788 liquid Substances 0.000 title claims abstract description 279
- 239000002826 coolant Substances 0.000 title claims abstract description 82
- 238000004064 recycling Methods 0.000 title claims abstract description 65
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 74
- 238000001802 infusion Methods 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 230000003993 interaction Effects 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 230000009469 supplementation Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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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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- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses a kind of bench test system and methods of engine coolant automatic liquid supply and recycling, mainly it is provided with liquid supply device, recyclable device and control device, wherein liquid supply device in expansion tank by being arranged liquid level detection device, to determine whether needing fluid infusion, when needing fluid infusion, control device controls fluid infusion control valve and opens, and so that the coolant liquid in fluid reservoir is filled into expansion tank, then fill into engine；Wherein recyclable device is after the end of the test, man-machine interaction unit input recycling signal, control device is set to close outlet pipe control valve, open return hydraulic control valve and compressed gas control switch, it is blown into compressed air, coolant liquid in engine is purged, coolant liquid is enabled to be recovered into fluid reservoir, and judges in engine whether coolant liquid recycles by liquid-detecting and finishes.It can be seen that the present invention realizes automatic fluid filling function during test, the recycling of coolant liquid after the test is realized, resource has been saved.
Description
Technical field
The present invention relates to technical field of vehicle detection more particularly to a kind of bench test engine coolant automatic liquid supplies
With the system and method for recycling.
Background technique
Engine carries out rack development experiments, needs in real time to cool down running engine with coolant liquid.Work as hair
When reducing because of total amount caused by high temperature etc. occurs in motivation operational process coolant liquid, liquid level is lower than limit value, it is necessary to stop engine into
Row fluid infusion, this will affect engine test efficiency.It is at present direct to the processing method of coolant liquid after the completion of engine test
In-engine coolant liquid is bled off in sewer, if but coolant liquid recycling still can continue to use, just cause in this way
The wasting of resources.
Summary of the invention
In view of the above deficiencies, the technical problems to be solved by the present invention are: providing a kind of bench test engine cool
The system and method for liquid automatic liquid supply and recycling, had not only realized the automatic supply of test process coolant liquid, but also realized test knot
The recycling of coolant liquid after beam, resource reclaim recycle.
In order to solve the above technical problems, the technical scheme is that
A kind of system of bench test engine coolant automatic liquid supply and recycling is respectively arranged on the engine
Cooling liquid water inlet pipe and coolant liquid outlet pipe, the cooling liquid water inlet pipe are connected to expansion tank, on the coolant liquid outlet pipe
It is provided with outlet pipe control valve, the system comprises: for storing the fluid reservoir of coolant liquid；Liquid supply device, the liquid supply device
Including liquid supplementation pipe, the fluid infusion control valve being located in the liquid supplementation pipe and level sensing for detecting the expansion tank liquid level
Device, the liquid supplementation pipe are connected to the fluid reservoir and the expansion tank；Liquid device is returned, described time liquid device includes recovery tube,
The return hydraulic control valve that is located on the recovery tube, the liquid-detecting being located on the recovery tube are discharged with the coolant liquid
The compressed gas inlet pipe and be located at compressed gas control switch on the compressed gas inlet pipe that pipe is connected to, the recovery tube connection are described cold
But liquid outlet pipe and the fluid reservoir；Control device, the control device include the human-computer interaction for inputting recycling electric signal
Unit, the control device respectively with the outlet pipe control valve, the fluid infusion control valve, the liquid level detection device, described
Return hydraulic control valve, the liquid-detecting and compressed gas control switch electrical connection；The control device is according to the liquid
The electric signal of level detecting apparatus transmission controls the fluid infusion control valve and realizes automatic liquid supply；The control device is according to the people
The electric signal of machine interactive unit and liquid-detecting transmission, controls the outlet pipe control valve, the return hydraulic control valve
It realizes and recycles with the compressed gas control switch.
Preferred embodiment is that the liquid level detection device includes upper liquid detecting electrode and lower liquid detecting electricity setting up and down
Pole, the floating ball of metal conductive strips and the fixed metal conductive strips；The upper liquid detecting electrode and the lower liquid detecting
Electrode is respectively provided on the expansion tank inner wall；The floating ball is located in the expansion tank；The upper liquid detecting electrode
Be electrically connected with the control device respectively with the lower liquid detecting electrode, the metal conductive strips by contact realize with it is described
The conducting of upper liquid detecting electrode, the metal conductive strips realize the conducting with the lower liquid detecting electrode by coolant liquid.
Preferred embodiment is that the liquid level detection device includes the two upper liquid detecting electrodes being oppositely arranged, each described
One end of upper liquid detecting electrode is fixed on the expansion tank inner wall, and the other end of each upper liquid detecting electrode protrudes into
In the expansion tank, and the distance between two described upper liquid detecting electrodes are adapted with the length of the metal conductive strips.
Preferred embodiment is that the liquid level detection device includes the two lower liquid detecting electrodes being oppositely arranged, each described
Lower liquid detecting electrode is embedded on the expansion tank inner wall.
Preferred embodiment is that each upper liquid detecting electrode protrudes into the end of the expansion tank as wedge shape；The metal
The end of conductive bar is to be inverted wedge shape.
Preferred embodiment is that the liquid-detecting includes the shell being located on the recovery tube, and interval be located at it is described
The intracorporal two liquid sensing electrode of shell, one end of the two liquid sensing electrodes protrude into the recovery tube and respectively with it is described
Control device electrical connection.
Preferred embodiment is that the control device includes the microprocessor and reset circuit of electrical connection.
A kind of method of bench test engine coolant automatic liquid supply and recycling is used applied to above-mentioned bench test
The system of engine coolant automatic liquid supply and recycling,
The method, comprising the following steps:
Obtain the expansion tank liquid level signal of liquid level detection device acquisition；
Judge whether expansion tank liquid level signal matches with presetting level threshold；
If so, generating corresponding fluid infusion control signal；
Signal is controlled according to the fluid infusion, control fluid infusion control valve opens and closes；
Whether the electric signal for judging man-machine interaction unit input is presetting recycling signal；
If so, generating corresponding recycling controls signal；
Signal is controlled according to the recycling, control outlet pipe control valve is closed, return hydraulic control valve is opened and compressed gas control
Switch is opened；
Whether the electric signal for judging liquid-detecting acquisition is pre-set value；
If it is, control return hydraulic control valve is closed and compressed gas control switch is closed, outlet pipe control valve is opened.
Preferred embodiment is, described to judge whether expansion tank liquid level signal matches with presetting level threshold, comprising:
When expansion tank liquid level signal and presetting liquid level lower limit match；
Then, signal is controlled according to the fluid infusion and controls the fluid infusion control valve opening；
When expansion tank liquid level signal and the presetting liquid level upper limit match；
Then, signal is controlled according to the fluid infusion and controls the fluid infusion control valve closing.
Preferred embodiment is whether the electric signal for judging liquid-detecting acquisition is pre-set value, specifically: judgement
Whether the electric signal that liquid-detecting acquires in the t time is continuously pre-set value.
After adopting the above technical scheme, the beneficial effects of the present invention are:
Due to the bench test of the invention system and method for engine coolant automatic liquid supply and recycling, mainly set
Liquid supply device, recyclable device and control device have been set, wherein liquid supply device is in expansion tank by being arranged liquid level detection device,
To determine whether needing fluid infusion, when needing fluid infusion, control device controls fluid infusion control valve and opens, and makes the coolant liquid in fluid reservoir
Expansion tank is filled into, then is filled into engine；Wherein recyclable device is after test, man-machine interaction unit input recycling telecommunications
Number, control device closes the outlet pipe control valve on coolant liquid outlet pipe, then opens return hydraulic control valve and compressed gas control switch,
It is blown into compressed air by compressed gas inlet pipe, in-engine coolant liquid is blown into recovery tube, is finally recovered into fluid reservoir,
And judges in engine whether coolant liquid recycles by liquid-detecting and finish.As it can be seen that the present invention realizes engine test
Automatic fluid filling function in the process, while the recycling of coolant liquid is realized after the end of the test, resource is saved, and the present invention is easy
It realizes, it is at low cost.
Since liquid level detection device includes the two upper liquid detecting electrodes being oppositely arranged, one end of each upper liquid detecting electrode
It is fixed on expansion tank inner wall, the other end of each upper liquid detecting electrode protrudes into expansion tank, and liquid detecting electricity on two
The distance between pole is adapted with the length of metal conductive strips, when this structure makes the liquid level in expansion tank reach the upper limit, metal
Conductive bar contacts conducting with liquid level detection electrode on two.
Since liquid level detection device includes the two lower liquid detecting electrodes being oppositely arranged, each lower liquid detecting electrode is embedded
On expansion tank inner wall, when this structure makes in expansion tank liquid level down to lower limit, without liquid, make metal conductive strips and lower liquid
Position detecting electrode disconnects.
Since liquid-detecting includes the shell being located on recovery tube, and interval is located at the intracorporal two liquid perception electricity of shell
Pole, one end of two liquid sensing electrodes are protruded into recovery tube and are electrically connected respectively with control device；This structure is in recovery tube
When having coolant liquid, the conducting of two liquid sensing electrodes, when not having coolant liquid, two liquid sensing electrodes are disconnected, to realize recovery tube
Inside whether there is the detection of coolant liquid.
Since control device includes the microprocessor and reset circuit of electrical connection, this reset circuit makes this system recycling cooling
After liquid, direct reduction when reusing.
Due to judging whether the electric signal of liquid-detecting acquisition is pre-set value, specifically: judge liquid in the t time
Whether the electric signal of detection device acquisition is continuously pre-set value, avoids maloperation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the system of bench test engine coolant automatic liquid supply and recycling；
Fig. 2 is the structural schematic diagram of the liquid-detecting in the present invention；
Fig. 3 is the structural schematic diagram of the liquid-detecting in the present invention；
In figure: 1- engine, 2- fluid reservoir, 3- expansion tank, 5- control device, 6- liquid supplementation pipe, 7- recovery tube, 8- fluid infusion
Control valve, 9- liquid level detection device, 90- floating ball, 91- metal conductive strips, the upper liquid detecting electrode of 92-, liquid detecting electricity under 93-
Pole, 10- coolant liquid outlet pipe, 11- compressed gas inlet pipe, 12- outlet pipe control valve, 13- liquid-detecting, the perception of 130- liquid
Electrode, 131- shell, 14- return hydraulic control valve, 15- compressed gas control switch, 16- heat exchanger, 17- connecting tube.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one:
As shown in Figure 1 to Figure 3, the system of a kind of bench test engine coolant automatic liquid supply and recycling, engine 1
On be respectively arranged with cooling liquid water inlet pipe and coolant liquid outlet pipe 10, cooling liquid water inlet pipe is connected to expansion tank 3, and coolant liquid goes out
Outlet pipe control valve 12 is provided on water pipe 10, cooling liquid water inlet pipe and coolant liquid outlet pipe 10 connect with heat exchanger 16 respectively
It is logical, the external cooling water return pipe of heat exchanger 16 and cooling water inlet pipe.
System of the invention includes for storing the fluid reservoir 2 of coolant liquid, liquid supply device, recyclable device and control device 5；
Wherein liquid supply device includes liquid supplementation pipe 6, the fluid infusion control valve 8 being located in liquid supplementation pipe 6 and for detecting 3 liquid level of expansion tank
Liquid level detection device 9, liquid supplementation pipe 6 are connected to fluid reservoir 2 and expansion tank 3, and expansion tank 3 is connected by connecting tube 17 and engine
It is logical；Wherein returning liquid device includes recovery tube 7, the return hydraulic control valve 14 being located on recovery tube 7, the liquid inspection being located on recovery tube 7
It surveys device 13, the compressed gas inlet pipe 11 being connected to coolant liquid outlet pipe 10 and is located at compressed gas control on compressed gas inlet pipe 11 and open
15 are closed, recovery tube 7 is connected to coolant liquid outlet pipe 10 and fluid reservoir 2；Wherein control device 5 includes for inputting recycling electric signal
Man-machine interaction unit, control device 5 respectively with outlet pipe control valve 12, fluid infusion control valve 8, liquid level detection device 9, return hydraulic control
Valve 14, liquid-detecting 13 and compressed gas control switch 15 are electrically connected, and control device 5 includes microprocessor in the present embodiment,
SMT32F10 series monolithic can be used in the preferred single-chip microcontroller of microprocessor.Control device 5 is transmitted according to liquid level detection device 9
Electric signal, control fluid infusion control valve 8 realize automatic liquid supply；Control device 5 is according to man-machine interaction unit and liquid-detecting 13
The electric signal of transmission, control outlet pipe control valve 12, return hydraulic control valve 14 and compressed gas control switch 15 realize recycling.
The system of bench test of the invention engine coolant automatic liquid supply and recycling is tested in engine 1
During, liquid level detection device 9 detects the liquid level in expansion tank 3, when liquid level reaches lower limit, shows in expansion tank 3
Fluid infusion is needed, control device 5 controls fluid infusion control valve 8 and opens at this time, keeps coolant liquid in fluid reservoir 2 swollen by the entrance of liquid supplementation pipe 6
In swollen water tank 3, then fill into engine 1.When liquid level detection device 9 detects that the liquid level in expansion tank 3 reaches the upper limit, close
It closes fluid infusion control valve 8 and stops fluid infusion.When engine 1 after the test, man-machine interaction unit input recycling electric signal, control device
5 close outlet pipe control valve 12, prevent coolant liquid from entering heat exchanger 16, open compressed gas control switch 15 and return hydraulic control
Valve 14 is blown into compressed air in engine 1 by compressed gas inlet pipe 11, and coolant liquid remaining in engine 1 is blown out, from cold
But liquid outlet pipe 10 enters in recovery tube 7, and flows through liquid-detecting 13, is finally recycled in fluid reservoir 2.When cooling liquid stream
When crossing liquid-detecting 13, liquid-detecting 13 exports corresponding electric signal to control device 5, and cooling is worked as in lasting recycling
After liquid recycles, when no liquid flows through liquid-detecting 13, liquid-detecting 13 transmits corresponding electric signal to control
Device 5 processed, control device 5 closes compressed gas control switch 15 and return hydraulic control valve 14, opens simultaneously outlet pipe control valve 12, cold
But liquid recycling finishes.As it can be seen that system of the invention had not only realized the automatic supply of test process coolant liquid, but also realize test knot
The recycling of coolant liquid after beam, resource reclaim recycles, and structure is simple, Yi Shixian, at low cost.
As shown in Fig. 2, liquid level detection device 9 includes upper liquid detecting electrode 92 and lower liquid detecting electrode setting up and down
93, the floating ball 90 of metal conductive strips 91 and fixed metal conductive strips 91；Upper liquid detecting electrode 92 and lower liquid detecting electrode
93 are respectively provided on 3 inner wall of expansion tank；Floating ball 90 is located in expansion tank 3；Upper liquid detecting electrode 92 and lower liquid detecting
Electrode 93 is electrically connected with control device 5 respectively, and metal conductive strips 91 realize the conducting with upper liquid detecting electrode 92 by contact,
Metal conductive strips 91 realize the conducting with lower liquid detecting electrode 93 by coolant liquid.In the present embodiment: liquid level detection device 9 wraps
The two upper liquid detecting electrodes 92 being oppositely arranged are included, one end of each upper liquid detecting electrode 92 is fixed on 3 inner wall of expansion tank,
The other end of each upper liquid detecting electrode 92 protrudes into expansion tank 3, and the distance between liquid detecting electrode 92 and gold on two
The length for belonging to conductive bar 91 is adapted, to realize contact conducting.Further, each upper liquid detecting electrode 92 protrudes into swelling water
The end of case 3 is wedge shape；The end of metal conductive strips 91 is to be inverted wedge shape, is floated to adapt to liquid, relatively reliable contact.
In the present embodiment, liquid level detection device 9 includes the two lower liquid detecting electrodes 93 being oppositely arranged, each lower liquid detecting
Electrode 93 is embedded on 3 inner wall of expansion tank, this structure guarantees that liquid level is lower than lower limit, and no coolant liquid makes lower liquid detecting electricity
Pole 93 exports low level.
9 working principle of liquid level detection device of the present embodiment are as follows:
When work, if 3 liquid level of expansion tank reaches the upper limit, under buoyancy, insulation floating ball 90 carries metal and leads
Electric item 91 contacts realization conducting with liquid level detection electrode on two, then is formed into a loop, and shows coolant liquid abundance, level sensing electricity on two
Machine transmits high level to control device 5；If expansion tank 3, which leads to liquid level persistently due to 1 fluid infusion of engine, to be reduced, work as liquid level
It is reduced to liquid level lower limit, that is, when descending liquid level detection electrode or less, due to there is no coolant liquid conducting metal conductive strips 91 and lower liquid level
Detecting electrode makes lower liquid level detection electrode because open circuit exports low level to control device 5, and control device 5 controls fluid infusion control at this time
Valve 8 processed is opened, and fills into the coolant liquid in fluid reservoir 2 in expansion tank 3 by liquid supplementation pipe 6, when liquid level reaches in liquid storage water tank
When the upper limit, control device 5 turns off fluid infusion control valve 8 and stops fluid infusion.As it can be seen that the present invention is by control device 5 according to level sensing
The leve signal that device 9 acquires automatically controls fluid infusion, is carried out continuously the test of engine 1, improves test efficiency.
As shown in figure 3, liquid-detecting 13 includes the shell 131 being located on recovery tube 7, and interval is located at shell 131
Two interior liquid sensing electrodes 130, one end of two liquid sensing electrodes 130 protrude into recovery tube 7 and respectively with control device 5
Electrical connection.Liquid-detecting 13 and compressed gas inlet pipe 11 set up separately in the two sides of return hydraulic control valve 14 in the present embodiment, and compress
Gas inlet pipe 11 is arranged close to 1 side of engine.Liquid-detecting 13 is set in the outside of recovery tube 7, two liquid sensing electrodes 130
The other end be electrically connected respectively with control device 5.
The working principle of liquid-detecting is as follows:
It is cooling when coolant liquid flows through two liquid sensing electrodes 130 if having coolant flow in recovery tube 7 when work
Two liquid sensing electrodes 130, forming circuit are connected in liquid, and two liquid sensing electrodes 130 transmit high level to control device 5, at this time
Compressed air is blown into always, continues to be purged in coolant liquid in engine 1, if in recovery tube 7 at two liquid sensing electrodes 130
There is no coolant liquid to pass through, then can not be formed into a loop, after the lasting t time, constant testing does not have to 13 circuit of liquid-detecting
When forming circuit, two liquid sensing electrodes 130 transmit low level to control device 5, then control device 5 thinks that coolant liquid has purged
It finishes, control device 5 closes compressed gas control switch 15 and return hydraulic control valve 14, opens simultaneously outlet pipe control valve 12, cooling
Liquid recycling finishes.
Control device 5 includes the microprocessor and reset circuit of electrical connection in the present embodiment, when needing to be tested again,
It can be triggered and be resetted by reset circuit, liquid supply device still can automatic liquid supply.This reset circuit is the prior art, again no longer in detail
Description.
Man-machine interaction unit include: the recycling button being electrically connected with microprocessor, the touch screen being electrically connected with microprocessor,
The speech control unit being electrically connected with microprocessor or the Digiplex being electrically connected with microprocessor, wherein voice control list
Member includes sound pickup sensor and speech recognition circuit, and Digiplex includes radio communication circuit, and corresponding control device 5 includes
The radio communication circuit being electrically connected with microprocessor.Certainly, man-machine interaction unit is unlimited listed above.In addition, can also benefit
The liquid level in expansion tank 3 is shown with touch screen, the liquid mobility status in recovery tube 7.
In conclusion system of the invention is made between fluid reservoir 2 and engine 1 by setting liquid supplementation pipe 6 and recovery tube 7
There are two circuits for tool, and the control valve on each circuit is controlled by control device 5, realization fluid infusion and recycling, while by means of
Liquid level detection device 9 and liquid-detecting 13, carry out automatically controlling fluid infusion and recycling, not only improve test efficiency, but also real
Resource reclaim recycling is showed.
Embodiment two:
A kind of method of bench test engine coolant automatic liquid supply and recycling is used applied to above-mentioned bench test
The system of engine coolant automatic liquid supply and recycling,
Method of the invention, comprising the following steps:
S1, the expansion tank liquid level signal for obtaining liquid level detection device acquisition；In this example, two upper liquids of liquid level detection device
Position detecting electrode contact forming circuit with metal conductive strips, transmits high level to microprocessor, when two descend liquid level detection electrodes and
When metal conductive strips disconnect, low level is transmitted to microprocessor；
S2, judge whether expansion tank liquid level signal matches with presetting level threshold；Presetting level threshold be but
It is not limited to high level and low level.
S3, if so, generating corresponding fluid infusion control signal；When expansion tank liquid level signal and high level match,
It is to open fluid infusion to control valve signal that fluid infusion, which controls signal, when expansion tank liquid level signal matches with low level, fluid infusion control
Signal is to close fluid infusion to control valve signal.
S4, signal is controlled according to fluid infusion, control fluid infusion control valve opens and closes；It is controlled in the present embodiment by microprocessor
Fluid infusion control valve opens and closes.
Whether S5, the electric signal for judging man-machine interaction unit input are presetting recycling signal；This presetting recycling signal
Setting corresponding with man-machine interaction unit, such as man-machine interaction unit include when recycling button, this presetting recycling signal is back
The high level or low level inputted when receiving button actions；When man-machine interaction unit includes speech control unit, presetting recycling letter
Number for sound pickup sensor acquisition the corresponding electric signal of voice command；When man-machine interaction unit includes touch screen, presetting recycling
Signal is the corresponding electric signal of " recycling " text.
S6, if so, generating corresponding recycling control signal；
S7, signal is controlled according to recycling, control outlet pipe control valve is closed, return hydraulic control valve is opened and compressed gas control is opened
It closes and opens；
Whether S8, the electric signal for judging liquid-detecting acquisition are pre-set value；In the present embodiment, judge in the t time
Whether the electric signal of liquid-detecting acquisition is continuously pre-set value, this t time is preset setting values, persistently examines in this time
It surveys, avoids maloperation, to keep coolant liquid recycling thorough.
S9, if it is, control return hydraulic control valve close and compressed gas control switch close, outlet pipe control valve open,
After opening outlet pipe, when making to be tested again, liquid supply device is able to use.
Step S2 in the present embodiment, comprising:
When expansion tank liquid level signal and presetting liquid level lower limit match；
Then, signal control fluid infusion control valve is controlled according to fluid infusion to open；
When expansion tank liquid level signal and the presetting liquid level upper limit match；
Then, signal control fluid infusion control valve is controlled according to fluid infusion to close.
Using method of the invention, during making engine test, it can be automatically replenished coolant liquid, mended without shutting down
It fills, improves test efficiency；And after the end of the test, by coolant liquid recycling and reusing, resource, and the method for the present invention letter are saved
Single Yi Shixian, it is at low cost.
The preferred embodiment of present invention described above, is not intended to limit the invention, it is all in spirit of the invention and
Within principle it is made it is any modification, etc. same bench test engine coolant automatic liquid supply and recycling system and side
The improvement etc. of method, should all be included in the protection scope of the present invention.
Claims (10)
1. the bench test system of engine coolant automatic liquid supply and recycling, coolant liquid is respectively arranged on the engine
Water inlet pipe and coolant liquid outlet pipe, the cooling liquid water inlet pipe are connected to expansion tank, are provided on the coolant liquid outlet pipe
Outlet pipe control valve, which is characterized in that the system comprises:
For storing the fluid reservoir of coolant liquid；
Liquid supply device, the liquid supply device include liquid supplementation pipe, the fluid infusion control valve being located in the liquid supplementation pipe and for detecting
The liquid level detection device of the expansion tank liquid level, the liquid supplementation pipe are connected to the fluid reservoir and the expansion tank；
Liquid device is returned, described time liquid device includes recovery tube, and the return hydraulic control valve that is located on the recovery tube is located at the recycling
It liquid-detecting on pipe, the compressed gas inlet pipe being connected to the coolant liquid outlet pipe and is located on the compressed gas inlet pipe
Compressed gas control switch, the recovery tube are connected to the coolant liquid outlet pipe and the fluid reservoir；
Control device, the control device include the man-machine interaction unit for inputting recycling electric signal, the control device point
Not with the outlet pipe control valve, the fluid infusion control valve, the liquid level detection device, the return hydraulic control valve, the liquid
Detection device and compressed gas control switch electrical connection；The telecommunications that the control device is transmitted according to the liquid level detection device
Number, it controls the fluid infusion control valve and realizes automatic liquid supply；The control device is according to the man-machine interaction unit and the liquid
The electric signal of detection device transmission, controls the outlet pipe control valve, the return hydraulic control valve and the compressed gas control switch
Realize recycling.
2. the bench test according to claim 1 system of engine coolant automatic liquid supply and recycling, feature exist
In, the liquid level detection device include upper liquid detecting electrode and lower liquid detecting electrode setting up and down, metal conductive strips with
And the floating ball of the fixed metal conductive strips；
The upper liquid detecting electrode and the lower liquid detecting electrode are respectively provided on the expansion tank inner wall；
The floating ball is located in the expansion tank；
The upper liquid detecting electrode and the lower liquid detecting electrode are electrically connected with the control device respectively, and the metal is led
Electric item by contact realize with the conducting of the upper liquid detecting electrode, the metal conductive strips by coolant liquid realization with it is described
The conducting of lower liquid detecting electrode.
3. the bench test according to claim 2 system of engine coolant automatic liquid supply and recycling, feature exist
In the liquid level detection device includes the two upper liquid detecting electrodes being oppositely arranged, each upper liquid detecting electrode
One end is fixed on the expansion tank inner wall, and the other end of each upper liquid detecting electrode protrudes into the expansion tank,
And two the distance between the upper liquid detecting electrode be adapted with the length of the metal conductive strips.
4. the bench test according to claim 2 system of engine coolant automatic liquid supply and recycling, feature exist
In the liquid level detection device includes the two lower liquid detecting electrodes being oppositely arranged, and each lower liquid detecting electrode is equal
It is embedded on the expansion tank inner wall.
5. the bench test according to claim 3 system of engine coolant automatic liquid supply and recycling, feature exist
In,
Each upper liquid detecting electrode protrudes into the end of the expansion tank as wedge shape；
The end of the metal conductive strips is to be inverted wedge shape.
6. the bench test according to any one of claims 1 to 5 system of engine coolant automatic liquid supply and recycling,
It is characterized in that, the liquid-detecting includes the shell being located on the recovery tube, and to be located at the shell intracorporal at interval
Two liquid sensing electrodes, one end of the two liquid sensing electrodes protrude into the recovery tube and respectively with the control device
Electrical connection.
7. the bench test according to claim 6 system of engine coolant automatic liquid supply and recycling, feature exist
In the control device includes the microprocessor and reset circuit of electrical connection.
8. the bench test method of engine coolant automatic liquid supply and recycling, which is characterized in that be applied to claim 1 to
The system of 7 described in any item bench tests engine coolant automatic liquid supplies and recycling,
The method, comprising the following steps:
Obtain the expansion tank liquid level signal of liquid level detection device acquisition；
Judge whether expansion tank liquid level signal matches with presetting level threshold；
If so, generating corresponding fluid infusion control signal；
Signal is controlled according to the fluid infusion, control fluid infusion control valve opens and closes；
Whether the electric signal for judging man-machine interaction unit input is presetting recycling signal；
If so, generating corresponding recycling controls signal；
Signal is controlled according to the recycling, control outlet pipe control valve is closed, return hydraulic control valve is opened and compressed gas control switch
It opens；
Whether the electric signal for judging liquid-detecting acquisition is pre-set value；
If it is, control return hydraulic control valve is closed and compressed gas control switch is closed, outlet pipe control valve is opened.
9. the bench test according to claim 8 method of engine coolant automatic liquid supply and recycling, feature exist
In described to judge whether expansion tank liquid level signal matches with presetting level threshold, comprising:
When expansion tank liquid level signal and presetting liquid level lower limit match；
Then, signal is controlled according to the fluid infusion and controls the fluid infusion control valve opening；
When expansion tank liquid level signal and the presetting liquid level upper limit match；
Then, signal is controlled according to the fluid infusion and controls the fluid infusion control valve closing.
10. the bench test according to claim 8 method of engine coolant automatic liquid supply and recycling, feature exist
In, whether the electric signal for judging liquid-detecting acquisition is pre-set value, specifically:
Whether the electric signal for judging that liquid-detecting acquires in the t time is continuously pre-set value.
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