CN106525452B - The test method and test macro of character of heat-fading energy - Google Patents
The test method and test macro of character of heat-fading energy Download PDFInfo
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- CN106525452B CN106525452B CN201611013544.7A CN201611013544A CN106525452B CN 106525452 B CN106525452 B CN 106525452B CN 201611013544 A CN201611013544 A CN 201611013544A CN 106525452 B CN106525452 B CN 106525452B
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- Force Measurement Appropriate To Specific Purposes (AREA)
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Abstract
The invention discloses the test macros and test method of a kind of heat fading performance detection, and wherein the test method includes: to control the wheel cooperation of rotating device and automobile on revolving drum test table, and control rotating device uniform rotation；The first pressure signal that the temperature signal and first pressure sensor that temperature collection sensor is sent are sent；According to the Startup time and end time of temperature signal control test, and first round power when power and second are taken turns is obtained respectively；According to the first round, in power, the second wheel, power and first pressure signal calculate and obtain heat fading rate.The test method of character of heat-fading energy provided by the invention realizes test and the higher consistency of actual middle character of heat-fading energy, ensure that the accuracy of test；Meanwhile test macro of the invention solves the problems, such as to be put to the test the factors such as place, environment in the prior art and lead to test result inaccuracy by the way that revolving drum test table is arranged.
Description
Technical field
The present invention relates to automobile technical field more particularly to the test methods and test macro of a kind of character of heat-fading energy.
Background technique
The heat fading of brake efficiency refers to that brake strip, which is affected by temperature, occurs a series of physicochemical change, makes
The coefficient of friction of brake becomes smaller, and moment of friction reduces, and then the brake efficiency of automobile is caused to decline.
Friction plate has been cured a large amount of specific organic matter in process of production, when brake operation temperature is more than certain temperature
When spending, the organic matter in friction plate can be thermally decomposed, and produced gas and liquid are between friction plate and brake drum or brake disc
It is full of, plays lubricating action, but the coefficient of friction for also resulting in friction plate simultaneously becomes smaller, moment of friction significantly reduces, that is, occurs
Brake efficiency heat fading problem easily leads to automobile and loses system if heat fading rate is not able to satisfy the requirement of each operating condition when running car
Kinetic force, cause a traffic accident accident.
In the prior art to character of heat-fading can test usually using an auxiliary brake as test object, the result pair tested
Vehicle brake-fade performance characterization inaccuracy, the goodness of fit be not high；In addition, when using all brakes of vehicle as research object,
Usually implement road retardation test, but since the factors such as test site, weather, environment, equipment and safety are to brake temperature side
There are certain limitations for the research in face, can lower the reliability of test data.
Summary of the invention
The object of the present invention is to provide the test methods and test macro of a kind of character of heat-fading energy, to solve above-mentioned existing skill
The problems in art guarantees the accuracy of test.
Instinct invention provides a kind of test method of character of heat-fading energy, which comprises the steps of:
The wheel for controlling rotating device and automobile on revolving drum test table cooperates, and controls the rotating device with first turn
Fast uniform rotation；
The first pressure signal that the temperature signal and first pressure sensor that temperature collection sensor is sent are sent；According to institute
The Startup time and end time of temperature signal control test are stated, and obtains first round power when power and second are taken turns respectively；
According to the first round, in power, second wheel, power and the first pressure signal calculate and obtain heat fading rate.
Test method as described above, wherein preferably, the temperature signal and the first pressure that temperature collection sensor is sent
The first pressure signal that force snesor is sent；According to the Startup time and end time of temperature signal control test, and point
Not Huo Qu the first round while power and second take turns while power specifically include:
When judging that the temperature signal reaches the first temperature value, starting test, and obtain first round side power；
Judge whether the temperature signal reaches second temperature value；
If it is, terminating test, and obtain the second wheel side power.
Test method as described above, wherein preferably, according to the first round in power, the second wheel power and described
First pressure signal calculates acquisition heat fading rate and specifically comprises the following steps:
Determine the first heat fading coefficient and the EOT end of test moment of test start time respectively according to heat fading coefficient equation
The second heat fading coefficient, the heat fading coefficient equation are as follows:
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side
Power, p are brake piping pressure；
Heat fading rate, the heat fading rate equation are determined according to heat fading rate equation are as follows:
δ=ηa/ηb
Wherein, δ is heat fading rate.
Test method as described above, wherein preferably, judging whether the temperature signal reaches second temperature
After angle value, the test method further include:
If not, judge the testing time whether be more than the time setting value；
If the testing time is more than the setting value of the time, terminated after testing the time set, and
Obtain the second wheel side power.
Test method as described above, wherein preferably, in the step " temperature signal that temperature collection sensor is sent
The first pressure signal sent with first pressure sensor；When according to the Startup time of temperature signal control test and termination
Carve, and obtain first round power when power and second are taken turns respectively " further comprise the steps of: the control rotating device before with the second revolving speed
Uniform rotation, to be preheated to test automobile.
The present invention also provides a kind of test macros of character of heat-fading energy, wherein includes:
Revolving drum test table is provided with and the matched rotating device of automotive wheel on the revolving drum test table；
Temperature sensor, the temperature sensor are fixed on the brake of automobile；
First pressure sensor, the first pressure sensor are fixed on the brake piping of automobile；
The first pressure that main control module, the temperature signal sent for temperature collection sensor and first pressure sensor are sent
Force signal；According to the Startup time and end time of temperature signal control test, and first round side power and the are obtained respectively
Two wheel side power；According to the first round, in power, second wheel, power and the first pressure signal calculate and obtain heat fading rate.
Test macro as described above, wherein preferably, the main control module includes:
First judging unit, for judge the starting test when the temperature signal reaches the first temperature value, and acquisition the
One wheel side power；
Second judgment unit is surveyed for judging whether the temperature signal reaches second temperature value if it is, terminating
Examination, and obtain the second wheel side power；
Third judging unit, for judge the testing time whether be more than the time setting value, if it is, test carry out
It is terminated after the time of setting.
Test macro as described above, wherein preferably, the temperature sensor includes front-wheel temperature sensor with after
Take turns temperature sensor；
The front-wheel temperature sensor is fixed on the front wheel brake of automobile；
The rear-wheel temperature sensor is fixed on the rear wheel brake of automobile.
Test macro as described above, wherein further include second pressure sensor preferably, the second pressure passes
Sensor is fixed on the brake pedal of automobile.
Test macro as described above, wherein it further include angular displacement sensor preferably, the angular displacement sensor
It is fixed on the brake pedal.
The test macro of character of heat-fading energy provided by the invention solves in the prior art by the way that revolving drum test table is arranged
The factors such as place, environment that are put to the test and the problem for leading to test result inaccuracy；Meanwhile heat fading provided in an embodiment of the present invention
The test method of performance realizes test and the higher consistency of actual middle character of heat-fading energy, ensure that the accuracy of test.
Detailed description of the invention
Fig. 1 is the flow chart of test method provided in an embodiment of the present invention；
Fig. 2 is the state diagram of the rotating device cooperation on automotive wheel and revolving drum test table；
Fig. 3 is the structural schematic diagram of brake system of car；
Fig. 4 is that first pressure sensor is assembled to the state diagram on brake piping；
Fig. 5 is that second pressure sensor and angular displacement sensor are mounted on the structural schematic diagram on brake pedal.
Description of symbols:
100- revolving drum test table 110- rotating device 200- wheel
210- front wheel brake 220- rear wheel brake 230- brake piping
300- brake pedal 310- second pressure sensor 320- angular displacement sensor
400- first pressure sensor 410- threeway
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Fig. 1 is the flow chart of test method provided in an embodiment of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of test methods of character of heat-fading energy, wherein including walking as follows
It is rapid:
The wheel of S200, the rotating device on control revolving drum test table and automobile cooperate, and control rotating device with first
Revolving speed uniform rotation；In embodiments of the present invention, which can be 20km/h.
Before step S200 can with comprising steps of
S100, control rotating device are with the second revolving speed uniform rotation, to preheat to test automobile.
It should be noted that the preheating time that preheating has setting is carried out to test automobile, in implementation provided by the invention
In example, which is 40min；And second revolving speed can be 80km/h, with guarantee within the preheating time of setting complete heat
Vehicle, and reach preferable hot Che Xiaoguo, in order to test.
The first pressure signal that the temperature signal and first pressure sensor that S300, temperature collection sensor are sent are sent；
According to the Startup time and end time of temperature signal control test, and first round power when power and second are taken turns is obtained respectively.
It should be noted that engine keeps the state of idling during being tested, brake piping is made to keep setting
Pressure, in embodiments of the present invention, as 30bar, which can be examined the pressure set by first pressure sensor
It measures.
It is understood that the pressure on brake piping can be controlled by way of trampling brake pedal.
Step S300 can specifically include:
S310, when judging that temperature signal reaches the first temperature value, starting test and obtains first round side power；Judge temperature
Whether signal reaches second temperature value, if it is, terminating test, and obtains the second wheel side power.
Specifically, in embodiments of the present invention, first temperature value can be 70 DEG C, when brake temperature reach this first
When temperature value, then start the detection that character of heat-fading energy is carried out to automobile.
S320, after judging whether temperature signal reaches second temperature value, test method further include:
If not, judge the testing time whether be more than the time setting value；
If the testing time is more than the setting value of time, terminated after testing the time set, and obtains second
Take turns side power.
It should be noted that the material of testing time friction plate according to used in automobile is set, preferably
, which can be set as 10min, if the testing time has been more than 10min and has not still reached second temperature value,
Then test stops after having carried out 10min.
S400, according to the first round, in power, the second wheel, power and first pressure signal calculate and obtain heat fading rate.
Specifically, according to the first round, in power, the second wheel, power and first pressure signal calculating acquisition heat fading rate are specifically wrapped
Include following steps:
Determine the first heat fading coefficient and the EOT end of test moment of test start time respectively according to heat fading coefficient equation
The second heat fading coefficient, heat fading coefficient equation are as follows:
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side
Power, p are brake piping pressure；
Heat fading rate, heat fading rate equation are determined according to heat fading rate equation are as follows:
δ=ηa/ηb
Wherein, δ is heat fading rate.
Fig. 2 is the state diagram of the rotating device cooperation on automotive wheel and revolving drum test table, and Fig. 3 is brake system of car
Structural schematic diagram, Fig. 4 are that first pressure sensor is assembled to the state diagram on brake piping.
Referring to Fig. 2 and Fig. 4, the embodiment of the invention also provides a kind of test macro of character of heat-fading energy, the surveys
Test system is used to implement the test method of character of heat-fading energy provided in an embodiment of the present invention, including revolving drum test table 100, temperature
Spend sensor, first pressure sensor 400 and main control module；Wherein, it is provided on revolving drum test table 100 and automotive wheel 200
Matched rotating device 110；Temperature sensor is fixed on the brake of automobile；The fixation of first pressure sensor 400 is set
It sets on the brake piping 230 of automobile；Temperature signal and first pressure of the main control module for the transmission of temperature collection sensor pass
The first pressure signal that sensor 400 is sent；According to the Startup time and end time of temperature signal control test, and obtain respectively
First round power when power and second are taken turns；According to the first round, in power, the second wheel, power and first pressure signal calculate and obtain heat fading
Rate.
Further, temperature sensor includes front-wheel temperature sensor and rear-wheel temperature sensor；Front-wheel temperature sensor
It is fixed on the front wheel brake 210 of automobile；Rear-wheel temperature sensor is fixed at the rear wheel brake 220 of automobile
On, it is possible thereby to test respectively the front wheels and rear wheels of automobile, by individually testing front wheels and rear wheels, before can excluding
Factor is interfered with each other between wheel and rear-wheel, keeps test data more accurate.
It should be noted that first pressure sensor 400 can be fixedly mounted on brake pipe by threeway 410 referring to Fig. 4
On road 230.
Further, main control module includes the first judging unit, second judgment unit and third judging unit；Wherein,
One judging unit obtains first round side power for judging the starting test when temperature signal reaches the first temperature value；Second sentences
Disconnected unit is for judging whether temperature signal reaches second temperature value, if it is, terminating test, and obtains the second wheel side power；
Third judging unit, for judge the testing time whether be more than the time setting value, if it is, test set when
Between after terminate.
Fig. 5 is that second pressure sensor and angular displacement sensor are mounted on the structural schematic diagram on brake pedal.
Further, as shown in figure 5, test macro provided in an embodiment of the present invention can also include second pressure sensor
310, second pressure sensor 310 is fixed on the brake pedal 300 of automobile, can pass through second pressure sensor 310
Control is applied to the power of brake pedal 300, and then controls pressure suffered by brake piping 230, pressure suffered by brake piping 230
It can be simultaneously displayed in first pressure sensor 400 with pressure.
Further, as shown in figure 5, in order to control the angle of the rotation of brake pedal 300, survey provided in an embodiment of the present invention
Test system can also further include angular displacement sensor 320, and angular displacement sensor 320 is fixed on brake pedal 300.
Further, test macro provided in an embodiment of the present invention can also include blower, and the wind speed and automobile of blower
Travel speed be consistent, with the resistance for the wind being subject to during simulated automotive actual travel, and then guarantee the accurate of test
Property.
The test macro of character of heat-fading energy provided in an embodiment of the present invention solves existing by the way that revolving drum test table is arranged
The factors such as place, environment that are put to the test in technology and the problem for leading to test result inaccuracy；Meanwhile it is provided in an embodiment of the present invention
The test method of character of heat-fading energy realizes test and the higher consistency of actual middle character of heat-fading energy, ensure that test
Accuracy.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (8)
1. a kind of test method of character of heat-fading energy, which comprises the steps of:
The wheel for controlling rotating device and automobile on revolving drum test table cooperates, and it is even with the first revolving speed to control the rotating device
Speed rotation；
The first pressure signal that the temperature signal and first pressure sensor that temperature collection sensor is sent are sent；According to the temperature
The Startup time and end time of signal control test are spent, and obtains first round power when power and second are taken turns respectively；
According to the first round, in power, second wheel, power and the first pressure signal calculate and obtain heat fading rate；
The first pressure signal that the temperature signal and first pressure sensor that temperature collection sensor is sent are sent；According to the temperature
The Startup time and end time of signal control test are spent, and obtains first round power when power and second are taken turns respectively and specifically includes:
When judging that the temperature signal reaches the first temperature value, starting test, and obtain first round side power；
Judge whether the temperature signal reaches second temperature value；
If it is, terminating test, and obtain the second wheel side power.
2. test method according to claim 1, which is characterized in that according to the first round while power, second wheel while power and
The first pressure signal calculates acquisition heat fading rate and specifically comprises the following steps:
Determined respectively according to heat fading coefficient equation test start time the first heat fading coefficient and the EOT end of test moment the
Two heat fading coefficients, the heat fading coefficient equation are as follows:
ηa=Fa/p
ηb=Fb/p
Wherein, ηaFor the first heat fading coefficient, ηbFor the second heat fading coefficient, FaFor first round side power, FbFor the second wheel side power, p
For brake piping pressure；
Heat fading rate, the heat fading rate equation are determined according to heat fading rate equation are as follows:
δ=ηa/ηb
Wherein, δ is heat fading rate.
3. test method according to claim 1, which is characterized in that judging whether the temperature signal reaches described
After two temperature values, the test method further include:
If not, judge the testing time whether be more than the time setting value；
If the testing time is more than the setting value of the time, terminated after testing the time set, and obtain
Second wheel side power.
4. test method according to claim 1, which is characterized in that in the step " temperature that temperature collection sensor is sent
The first pressure signal that signal and first pressure sensor are sent；According to the Startup time of temperature signal control test and end
The only moment, and first round power when power and second are taken turns is obtained respectively " further comprise the steps of: the control rotating device before with second
Revolving speed uniform rotation, to be preheated to test automobile.
5. a kind of test macro of character of heat-fading energy, which is characterized in that the test macro is any for implementing claim 1-4
Test method described in, comprising:
Revolving drum test table is provided with and the matched rotating device of automotive wheel on the revolving drum test table；
Temperature sensor, the temperature sensor are fixed on the brake of automobile；
First pressure sensor, the first pressure sensor are fixed on the brake piping of automobile；
The first pressure letter that main control module, the temperature signal sent for temperature collection sensor and first pressure sensor are sent
Number；According to the Startup time and end time of temperature signal control test, and first round side power and the second wheel are obtained respectively
Bian Li；According to the first round, in power, second wheel, power and the first pressure signal calculate and obtain heat fading rate；
The main control module includes:
First judging unit for judging the starting test when the temperature signal reaches the first temperature value, and obtains the first round
Bian Li；
Second judgment unit, for judging whether the temperature signal reaches second temperature value, if it is, test is terminated, and
Obtain the second wheel side power；
Third judging unit, for judge the testing time whether be more than the time setting value, if it is, test set
Time after terminate.
6. test macro according to claim 5, which is characterized in that the temperature sensor includes front-wheel temperature sensor
With rear-wheel temperature sensor；
The front-wheel temperature sensor is fixed on the front wheel brake of automobile；
The rear-wheel temperature sensor is fixed on the rear wheel brake of automobile.
7. test macro according to claim 5, which is characterized in that it further include second pressure sensor, second pressure
Force snesor is fixed on the brake pedal of automobile.
8. test macro according to claim 7, which is characterized in that further include angular displacement sensor, the angular displacement passes
Sensor is fixed on the brake pedal.
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| CN201611013544.7A CN106525452B (en) | 2016-11-17 | 2016-11-17 | The test method and test macro of character of heat-fading energy |
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| CN201611013544.7A CN106525452B (en) | 2016-11-17 | 2016-11-17 | The test method and test macro of character of heat-fading energy |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738203A (en) * | 2018-12-29 | 2019-05-10 | 北京新能源汽车股份有限公司 | Brake test device and test method for dynamic brake performance of automatic driving vehicle |
| CN110763485A (en) * | 2019-11-05 | 2020-02-07 | 中国汽车工程研究院股份有限公司 | Method and system for testing performance of automobile anti-heat fading braking system |
| CN114878182B (en) * | 2022-04-29 | 2024-04-09 | 东风汽车股份有限公司 | Heat fading performance test method for automobile brake system |
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