CN108287076B - Resistance curve testing method and device - Google Patents
Resistance curve testing method and device Download PDFInfo
- Publication number
- CN108287076B CN108287076B CN201810063275.8A CN201810063275A CN108287076B CN 108287076 B CN108287076 B CN 108287076B CN 201810063275 A CN201810063275 A CN 201810063275A CN 108287076 B CN108287076 B CN 108287076B
- Authority
- CN
- China
- Prior art keywords
- tire
- road sliding
- vehicle
- tested
- rolling resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 94
- 238000005096 rolling process Methods 0.000 claims abstract description 127
- 238000000034 method Methods 0.000 claims abstract description 51
- 230000008569 process Effects 0.000 claims abstract description 37
- 238000010998 test method Methods 0.000 claims abstract description 9
- 238000004590 computer program Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 abstract description 12
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G01M17/02—Tyres
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tires In General (AREA)
Abstract
The invention provides a method and a device for testing a resistance curve, wherein the method comprises the following steps: acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in a road sliding process of the vehicle; acquiring a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at the plurality of linear speeds; and determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle is provided with the tire to be tested in the road sliding process according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle. The test method provided by the embodiment of the invention can obtain the road sliding resistance curves corresponding to tires with different rolling resistance coefficients of the same series of vehicle types, and simultaneously avoids the problems of repeatability of the road sliding resistance curve test of the same series of vehicle types and errors caused by larger change of environmental factors.
Description
Technical Field
The invention relates to the field of finished automobile testing, in particular to a method and a device for testing a resistance curve.
Background
In the process of developing the performance of the pure electric automobile, an economic driving range test is generally carried out by a chassis dynamometer, and the principle is that the running resistance of a test vehicle on an actual road is measured, and the measured road sliding resistance is simulated on the chassis dynamometer, so that the working condition of the vehicle running on the actual road is reproduced in a test room, and the economic driving range test is carried out.
The road sliding resistance curve of the electric automobile has an important influence on an economic driving range test, the factors influencing the road sliding resistance mainly comprise rolling resistance, wind resistance and acceleration resistance, different rolling resistance coefficients of different tires directly influence the road sliding resistance curve, the tires with different rolling resistance coefficients are replaced to carry out the road sliding resistance curve, the obtained change is often not as large as the error caused by the change of environment factors of the sliding test, and the tire with the optimal rolling resistance coefficient cannot be accurately analyzed and found.
Disclosure of Invention
The invention provides a resistance curve testing method and a resistance curve testing device, which are used for solving the problem that the final testing result is inaccurate due to the influence of the testing environment on the testing result of a road sliding resistance curve in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided a method of testing a resistance curve, the method comprising:
acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in a road sliding process of the vehicle;
acquiring a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at the plurality of linear speeds;
and determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle is provided with the tire to be tested in the road sliding process according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle.
Further, the step of obtaining a first road sliding resistance curve corresponding to a mounted tire of the vehicle during the road sliding process of the vehicle comprises:
in the road sliding process of a vehicle, acquiring first road sliding resistance corresponding to each linear velocity of a mounted tire of the vehicle under a plurality of linear velocities;
fitting the obtained plurality of first road sliding resistance to obtain a first road sliding resistance curve corresponding to the mounted tires of the vehicle.
Further, the step of obtaining a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at a plurality of linear speeds includes:
testing a first rolling resistance coefficient corresponding to each linear speed of the mounted tire under a plurality of linear speeds through rolling resistance coefficient testing equipment;
and testing a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested under a plurality of linear speeds through rolling resistance coefficient testing equipment, wherein the plurality of linear speeds during the testing of the tire are in one-to-one correspondence with the plurality of linear speeds during the testing of the tire to be tested, and the two corresponding linear speeds are equal.
Further, the step of determining, according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle, a second road sliding resistance curve corresponding to the tire to be tested during the road sliding process when the tire to be tested is mounted on the vehicle includes:
acquiring a first rolling resistance coefficient corresponding to the mounted tire, a second rolling resistance coefficient corresponding to the tire to be tested and a first road sliding resistance corresponding to the first road sliding resistance curve at the same linear speed;
subtracting the product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from the product of the weight of the vehicle and a first rolling resistance coefficient corresponding to the mounted tire at the same linear speed to obtain a corresponding resistance difference value at the same linear speed;
obtaining a second road sliding resistance corresponding to the same linear speed according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference at the same linear speed;
and fitting the plurality of obtained second road sliding resistances to obtain a second road sliding resistance curve corresponding to the test tire.
According to yet another aspect of the present invention, there is provided a resistance curve testing apparatus, comprising:
the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in the road sliding process of the vehicle;
the second obtaining module is used for obtaining a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at the plurality of linear speeds;
and the processing module is used for determining a second road sliding resistance curve corresponding to the tire to be tested in the road sliding process when the vehicle is installed with the tire to be tested according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle.
Further, the first obtaining module comprises:
the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring first road sliding resistance corresponding to each linear velocity of a mounted tire of a vehicle under a plurality of linear velocities in the road sliding process of the vehicle;
and the first fitting unit is used for fitting the acquired first road sliding resistance to obtain a first road sliding resistance curve corresponding to the mounted tire of the vehicle.
Further, the second obtaining module includes:
the second obtaining unit is used for testing a first rolling resistance coefficient corresponding to each linear speed of the mounted tire under a plurality of linear speeds through rolling resistance coefficient testing equipment;
and the third obtaining unit is used for testing a second rolling resistance coefficient corresponding to each linear velocity of the tire to be tested under a plurality of linear velocities through rolling resistance coefficient testing equipment, wherein the plurality of linear velocities during the tire installation are in one-to-one correspondence with the plurality of linear velocities during the testing of the tire to be tested, and the two corresponding linear velocities are equal.
Further, the processing module comprises:
the fourth acquiring unit is used for acquiring a first rolling resistance coefficient corresponding to the mounted tire, a second rolling resistance coefficient corresponding to the tire to be tested and a corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed;
the first calculation unit is used for subtracting the product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from the product of the weight of the vehicle and a first rolling resistance coefficient corresponding to the mounted tire at the same linear speed to obtain a resistance difference value corresponding to the same linear speed;
the second calculation unit is used for obtaining a second road sliding resistance corresponding to the same linear speed according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference at the same linear speed;
and the second fitting unit is used for fitting the obtained second road sliding resistance to obtain a second road sliding resistance curve corresponding to the test tire.
According to still another aspect of the present invention, there is provided a test apparatus including: a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of testing a resistance curve as described above.
According to a further aspect of the invention, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of testing a resistance curve as described above.
The invention has the beneficial effects that:
according to the technical scheme, a first road sliding resistance curve corresponding to a mounted tire on a vehicle is obtained in the road sliding process of the vehicle; and respectively testing the rolling resistance coefficients of the mounted tire and the tire to be tested at different linear speeds, and determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle mounts the tire to be tested in the road sliding process according to the obtained first road sliding resistance curve and the rolling resistance coefficients corresponding to the mounted tire and the tire to be tested. Therefore, the road sliding resistance curves corresponding to tires with different rolling resistance coefficients of the same series of vehicles can be obtained, the test precision can be improved, the whole vehicle dynamic property and economic development period can be shortened, and the real-time requirements of a large number of users can be met; meanwhile, the problems of repeatability of a road sliding resistance curve test of the same series of vehicle types and errors caused by large change of environmental factors are solved.
Drawings
FIG. 1 is a schematic diagram of a method for testing a resistance curve according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a resistance curve testing device provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of a first obtaining module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second obtaining module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a processing module according to an embodiment of the present invention.
Description of reference numerals:
21. a first acquisition module; 211. a first acquisition unit; 212. a first fitting unit; 22. a second acquisition module; 221. a second acquisition unit; 222. a third acquisition unit; 23. a processing module; 231. a fourth acquisition unit; 232. a first calculation unit; 233. a second calculation unit; 234. and a second fitting unit.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a method for testing a resistance curve, where the method for testing a resistance curve includes:
s11, acquiring a first road sliding resistance curve corresponding to a mounted tire of the vehicle in the road sliding process of the vehicle;
it should be noted that the vehicle is subjected to a road skid test when the mounted tire is mounted, so as to obtain a first road skid resistance curve corresponding to the mounted tire. In order to ensure the stability of the test results, it is preferred that the vehicle with the mounted tires is run in for at least 1000 km before the vehicle is subjected to a road planing test and loaded to a half load mass. Meanwhile, in order to facilitate the subsequent whole vehicle performance test process, such as the vehicle endurance mileage, namely energy consumption and the like, the handheld meteorological station NK4000 can be used for testing environmental factors such as wind speed, wind direction, temperature, humidity, atmospheric pressure and the like when the vehicle is subjected to a road sliding test. Further, when the vehicle is subjected to a road slide test, preferably, the test can be performed under a flat road condition.
S12, acquiring a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at a plurality of linear speeds;
it should be noted that the rolling resistance coefficient of the tire changes with the change of its own linear velocity, and the linear velocity here may also be the angular velocity or the rotational velocity corresponding to the linear velocity; and the linear velocity of the tire can be considered to be the speed of the vehicle on which the tire is mounted. The rolling resistance coefficient of the tire at different linear speeds can be measured by the existing rolling resistance coefficient testing equipment, and can be obtained by recording the curve of the rolling resistance coefficient of the tire along with the change of the linear speed of the tire, but is not limited to this.
And S13, determining a second road sliding resistance curve corresponding to the tire to be tested when the tire to be tested is mounted on the vehicle in the road sliding process according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle.
It should be noted that, according to the obtained vehicle installation, a first road sliding resistance curve measured when the tire is installed is obtained, and a second road sliding resistance corresponding to the vehicle installation when the tire is to be tested is obtained, and since the change of the two tests is only to change the tire, the difference value of the rolling resistance caused by changing the tire can be considered as the difference value of the corresponding first road sliding resistance and the corresponding second road sliding resistance at the same speed in the first road sliding resistance curve and the second road sliding resistance curve. And calculating to obtain a corresponding resistance difference value at the same speed in the first road sliding resistance curve and the second road sliding resistance curve according to the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle, thereby determining the second road sliding resistance curve.
In the embodiment of the invention, a first road sliding resistance curve corresponding to a mounted tire on a vehicle is obtained in the road sliding process of the vehicle; and respectively testing the rolling resistance coefficients of the mounted tire and the tire to be tested at different linear speeds, and determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle mounts the tire to be tested in the road sliding process according to the obtained first road sliding resistance curve and the rolling resistance coefficients corresponding to the mounted tire and the tire to be tested. Therefore, the road sliding resistance curves corresponding to tires with different rolling resistance coefficients of the same series of vehicles can be obtained, the test precision can be improved, the whole vehicle dynamic property and economic development period can be shortened, and the real-time requirements of a large number of users can be met; meanwhile, the problems of repeatability of a road sliding resistance curve test of the same series of vehicle types and errors caused by large change of environmental factors are solved.
In order to accurately measure a first road sliding resistance curve corresponding to a mounted tire of a vehicle in a road sliding process of the vehicle, on the basis of the embodiment of the invention, the step of acquiring the first road sliding resistance curve corresponding to the mounted tire of the vehicle in the road sliding process of the vehicle comprises the following steps:
in the road sliding process of a vehicle, acquiring first road sliding resistance corresponding to each linear velocity of a mounted tire of the vehicle under a plurality of linear velocities;
and fitting the obtained first road sliding resistance to obtain a first road sliding resistance curve corresponding to the mounted tire of the vehicle.
It should be noted that during road coasting of the vehicle, the linear velocity of the tires mounted on the vehicle may be considered as the vehicle speed of the vehicle. Therefore, the first road sliding resistance corresponding to each vehicle speed of the vehicle under a plurality of vehicle speeds can be obtained, and the first road sliding resistance comprises rolling resistance, air resistance and power train resistance. Specifically, during the test, the gear of the test vehicle is placed in a neutral gear, and the road sliding resistance corresponding to the test vehicle at each constant speed point is measured and calculated by using the whole vehicle performance test equipment, wherein the constant speed point is a fixed speed at which the speed of the test vehicle is constant, and the speed difference between two adjacent constant speed points is equal and is increased progressively in sequence, for example, 5km/h, 10km/h, 15km/h … … 115km/h, and 120 km/h; but not limited to, the vehicle speed difference between the adjacent constant speed vehicle speed points can also be set by itself.
Fitting is carried out according to the obtained plurality of road sliding resistances, and a first road sliding resistance curve corresponding to the mounted tires of the vehicle can be obtained.
In order to obtain the rolling resistance coefficients of the tire corresponding to different linear speeds, on the basis of the embodiments of the present invention, in the embodiments of the present invention, the step of obtaining the first rolling resistance coefficient corresponding to each linear speed of the tire to be mounted at a plurality of linear speeds and the second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at a plurality of linear speeds includes:
testing a first rolling resistance coefficient corresponding to each linear speed of the mounted tire under a plurality of linear speeds through rolling resistance coefficient testing equipment;
and testing a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested under a plurality of linear speeds through rolling resistance coefficient testing equipment, wherein the plurality of linear speeds during testing and mounting the tire correspond to the plurality of linear speeds during testing the tire to be tested one by one, and the two corresponding linear speeds are equal.
It should be noted that the rolling resistance coefficient testing device may test the corresponding rolling resistance coefficient of the tire at different linear speeds, where the linear speed may also be an angular speed or a rotational speed corresponding to the linear speed; specifically, during testing, a rolling resistance coefficient testing device is used for measuring and calculating a first rolling resistance coefficient corresponding to each linear velocity of the mounted tire, wherein each linear velocity can be equal to the velocity difference between two adjacent lines of velocity and is increased in sequence, for example, 5km/h, 10km/h, 15km/h … … 115km/h and 120 km/h; but not limited thereto, the speed difference between the speeds of the adjacent two lines can be set by itself; then testing a corresponding second rolling resistance coefficient of the tire to be tested at each linear speed by using the method and the linear speeds; of course, the order of testing the mounted tire and the tire to be tested may be reversed.
On the basis of the above embodiments of the invention, in the embodiment of the invention, the step of determining the second road sliding resistance curve corresponding to the tire to be tested during the road sliding process when the tire to be tested is installed on the vehicle according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle includes:
acquiring a first rolling resistance coefficient corresponding to a mounted tire, a second rolling resistance coefficient corresponding to a tire to be tested and a corresponding first road sliding resistance in a first road sliding resistance curve at the same linear speed;
it should be noted that the first road sliding resistance curve is a curve relating to vehicle speed and resistance, where the linear speed is the vehicle speed in the first road sliding resistance curve, and specifically, each linear speed may correspond to a first road sliding resistance; the installation tire corresponds different first rolling resistance coefficients under different linear speeds, the installation tire corresponds to only one first rolling resistance coefficient under the same linear speed, and the tire to be tested corresponds to only one first rolling resistance coefficient under the same linear speed.
Subtracting the product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from the product of the weight of the vehicle and the first rolling resistance coefficient corresponding to the tire to be tested at the same linear speed to obtain a corresponding resistance difference value at the same linear speed;
it should be noted that the weight of the vehicle is a product of the mass of the vehicle and the acceleration of gravity, and may also be a pressure value of the vehicle to a horizontal ground. And under the same linear speed, the respective rolling resistance coefficients of the mounted tire and the tire to be tested are different.
Obtaining a second road sliding resistance corresponding to the same linear speed according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference at the same linear speed;
and fitting the plurality of obtained second road sliding resistances to obtain a second road sliding resistance curve corresponding to the test tire.
It should be noted that, in an ideal state, in the process of acquiring the first road sliding resistance curve and the second road sliding resistance curve, the change amount in the two-time test acquisition process of the vehicle is only the tire, so that the rolling resistance difference caused by changing the tire can be considered as the difference between the corresponding first road sliding resistance and the corresponding second road sliding resistance at the same speed in the first road sliding resistance curve and the second road sliding resistance curve. Calculating to obtain corresponding resistance difference values at the same speed in a first road sliding resistance curve and a second road sliding resistance curve according to the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle; and then according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference value at the same linear speed, obtaining the corresponding second road sliding resistance at the same linear speed so as to obtain a plurality of second road sliding resistances, and fitting the obtained plurality of second road sliding resistances so as to determine a second road sliding resistance curve.
For example, first road sliding resistance F1 corresponding to 5km/h in a first road sliding resistance curve is obtained, then a first rolling resistance coefficient F1 corresponding to a mounted tire at 5km/h and a second rolling resistance coefficient F ' 1 corresponding to a tire to be tested at 5km/h are obtained, the weight of a vehicle is mg, a resistance difference △ F1 corresponding to 5km/h is mg × F1-mg × F ' 1, a second road sliding resistance F ' 1 corresponding to 5km/h is F1+ △ F1, a second road sliding resistance corresponding to 10km/h, a second road sliding resistance corresponding to 15km/h and the like can be obtained in the same manner, and the obtained second road sliding resistances are fitted, so that a second road sliding resistance curve corresponding to a tested tire is obtained.
According to the embodiment of the invention, the second road sliding resistance curve corresponding to the tested tire is obtained in a calculation mode, so that the problem of errors caused by large change of environmental factors is avoided; and the resistance difference value is calculated by measuring the rolling resistance coefficient of the tire through the rolling resistance coefficient testing equipment, so that the method is simpler and more convenient.
As shown in fig. 2 to 5, according to still another aspect of the present invention, there is provided a resistance curve testing apparatus including:
the first acquisition module 21 is used for acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in the road sliding process of the vehicle;
the second obtaining module 22 is configured to obtain a first rolling resistance coefficient corresponding to each linear velocity of the mounted tire at multiple linear velocities and a second rolling resistance coefficient corresponding to each linear velocity of the tire to be tested at multiple linear velocities;
the processing module 23 is configured to determine, according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient, and the weight of the vehicle, a second road sliding resistance curve corresponding to the tire to be tested during road sliding of the tire to be tested mounted on the vehicle.
Wherein, the first obtaining module 21 includes:
a first obtaining unit 211, configured to obtain, during road coasting of the vehicle, a first road coasting resistance corresponding to each linear velocity of a mounted tire of the vehicle at a plurality of linear velocities;
and a first fitting unit 212, configured to fit the acquired multiple first road sliding resistances to obtain a first road sliding resistance curve corresponding to a mounted tire of the vehicle.
The second acquisition module 22 includes:
the second obtaining unit 221, configured to test, by the rolling resistance coefficient testing device, a first rolling resistance coefficient corresponding to each linear velocity of the mounted tire at multiple linear velocities;
the third obtaining unit 222 is configured to test, through the rolling resistance coefficient testing device, a second rolling resistance coefficient corresponding to each linear velocity of the tire to be tested at multiple linear velocities, where the multiple linear velocities when the tire is mounted in a test are in one-to-one correspondence with the multiple linear velocities when the tire to be tested is tested, and the two corresponding linear velocities are equal to each other.
The processing module 23 includes:
a fourth obtaining unit 231, configured to obtain a first rolling resistance coefficient corresponding to the mounted tire, a second rolling resistance coefficient corresponding to the tire to be tested, and a corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed;
the first calculating unit 232 is configured to subtract a product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from a product of the weight of the vehicle and a first rolling resistance coefficient corresponding to the tire to be mounted at the same linear speed to obtain a resistance difference value corresponding to the same linear speed;
the second calculating unit 233 is configured to obtain a second road sliding resistance corresponding to the same linear speed according to the sum of the first road sliding resistance corresponding to the first road sliding resistance curve at the same linear speed and the resistance difference corresponding to the same linear speed;
and a second fitting unit 234, configured to fit the obtained plurality of second road sliding resistances to obtain a second road sliding resistance curve corresponding to the test tire.
In the embodiment of the invention, a first road sliding resistance curve corresponding to a mounted tire on a vehicle is obtained in the road sliding process of the vehicle; and respectively testing the rolling resistance coefficients of the mounted tire and the tire to be tested at different linear speeds, and determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle mounts the tire to be tested in the road sliding process according to the obtained first road sliding resistance curve and the rolling resistance coefficients corresponding to the mounted tire and the tire to be tested. Therefore, the road sliding resistance curves corresponding to tires with different rolling resistance coefficients of the same series of vehicles can be obtained, the test precision can be improved, the whole vehicle dynamic property and economic development period can be shortened, and the real-time requirements of a large number of users can be met; meanwhile, the problems of repeatability of a road sliding resistance curve test of the same series of vehicle types and errors caused by large change of environmental factors are solved.
According to still another aspect of the present invention, there is provided a test apparatus including: a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of testing a resistance curve as described above.
According to a further aspect of the invention, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of testing a resistance curve as described above.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
Claims (6)
1. A method of testing a resistance curve, the method comprising:
acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in a road sliding process of the vehicle;
acquiring a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at the plurality of linear speeds;
determining a second road sliding resistance curve corresponding to the tire to be tested when the vehicle is mounted with the tire to be tested in the road sliding process according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle;
the step of obtaining a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at a plurality of linear speeds comprises:
testing a first rolling resistance coefficient corresponding to each linear speed of the mounted tire under a plurality of linear speeds through rolling resistance coefficient testing equipment;
testing a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested under a plurality of linear speeds through rolling resistance coefficient testing equipment, wherein the plurality of linear speeds when the tire is installed are tested and are in one-to-one correspondence with the plurality of linear speeds when the tire to be tested is tested, and the two corresponding linear speeds are equal;
the step of determining a second road sliding resistance curve corresponding to the tire to be tested in the road sliding process of the vehicle mounted with the tire to be tested according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle comprises the following steps:
acquiring a first rolling resistance coefficient corresponding to the mounted tire, a second rolling resistance coefficient corresponding to the tire to be tested and a first road sliding resistance corresponding to the first road sliding resistance curve at the same linear speed;
subtracting the product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from the product of the weight of the vehicle and a first rolling resistance coefficient corresponding to the mounted tire at the same linear speed to obtain a corresponding resistance difference value at the same linear speed;
obtaining a second road sliding resistance corresponding to the same linear speed according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference at the same linear speed;
and fitting the plurality of obtained second road sliding resistances to obtain a second road sliding resistance curve corresponding to the test tire.
2. The method for testing a resistance curve according to claim 1, wherein the step of obtaining a first road skidding resistance curve corresponding to a mounted tire of a vehicle during road skidding comprises:
in the road sliding process of a vehicle, acquiring first road sliding resistance corresponding to each linear velocity of a mounted tire of the vehicle under a plurality of linear velocities;
fitting the obtained plurality of first road sliding resistance to obtain a first road sliding resistance curve corresponding to the mounted tires of the vehicle.
3. A resistance curve testing apparatus, comprising:
the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a first road sliding resistance curve corresponding to a mounted tire of a vehicle in the road sliding process of the vehicle;
the second obtaining module is used for obtaining a first rolling resistance coefficient corresponding to each linear speed of the mounted tire at a plurality of linear speeds and a second rolling resistance coefficient corresponding to each linear speed of the tire to be tested at the plurality of linear speeds;
the processing module is used for determining a second road sliding resistance curve corresponding to the tire to be tested in the road sliding process when the vehicle is installed with the tire to be tested according to the first road sliding resistance curve, the first rolling resistance coefficient, the second rolling resistance coefficient and the weight of the vehicle;
wherein the second obtaining module comprises:
the second obtaining unit is used for testing a first rolling resistance coefficient corresponding to each linear speed of the mounted tire under a plurality of linear speeds through rolling resistance coefficient testing equipment;
a third obtaining unit, configured to test, by a rolling resistance coefficient test device, a second rolling resistance coefficient corresponding to each linear velocity of the tire to be tested at multiple linear velocities, where the multiple linear velocities when the tire is mounted are tested are in one-to-one correspondence with the multiple linear velocities when the tire to be tested is tested, and the two corresponding linear velocities are equal to each other;
the processing module comprises:
the fourth acquiring unit is used for acquiring a first rolling resistance coefficient corresponding to the mounted tire, a second rolling resistance coefficient corresponding to the tire to be tested and a corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed;
the first calculation unit is used for subtracting the product of the weight of the vehicle and a second rolling resistance coefficient corresponding to the tire to be tested at the same linear speed from the product of the weight of the vehicle and a first rolling resistance coefficient corresponding to the mounted tire at the same linear speed to obtain a resistance difference value corresponding to the same linear speed;
the second calculation unit is used for obtaining a second road sliding resistance corresponding to the same linear speed according to the sum of the corresponding first road sliding resistance in the first road sliding resistance curve at the same linear speed and the corresponding resistance difference at the same linear speed;
and the second fitting unit is used for fitting the obtained second road sliding resistance to obtain a second road sliding resistance curve corresponding to the test tire.
4. The resistance curve testing device of claim 3, wherein the first obtaining module comprises:
the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring first road sliding resistance corresponding to each linear velocity of a mounted tire of a vehicle under a plurality of linear velocities in the road sliding process of the vehicle;
and the first fitting unit is used for fitting the acquired first road sliding resistance to obtain a first road sliding resistance curve corresponding to the mounted tire of the vehicle.
5. A test apparatus, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method of testing a resistance curve according to any one of claims 1 to 2.
6. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the method of testing a resistance curve according to any one of claims 1 to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063275.8A CN108287076B (en) | 2018-01-23 | 2018-01-23 | Resistance curve testing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810063275.8A CN108287076B (en) | 2018-01-23 | 2018-01-23 | Resistance curve testing method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108287076A CN108287076A (en) | 2018-07-17 |
| CN108287076B true CN108287076B (en) | 2020-07-28 |
Family
ID=62835647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810063275.8A Active CN108287076B (en) | 2018-01-23 | 2018-01-23 | Resistance curve testing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108287076B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238740B (en) * | 2018-08-30 | 2020-03-24 | 安徽江淮汽车集团股份有限公司 | Comprehensive evaluation method for automobile sliding resistance based on whole automobile mass and volume |
| CN109342078B (en) * | 2018-09-28 | 2021-02-26 | 北京新能源汽车股份有限公司 | Economical efficiency testing method, device and testing device for electric four-wheel drive vehicle |
| CN110514453A (en) * | 2019-08-30 | 2019-11-29 | 奇瑞商用车（安徽）有限公司 | A kind of new-energy automobile resistance of taxing processing method |
| CN113654809A (en) * | 2021-07-27 | 2021-11-16 | 河南德力新能源汽车有限公司 | Method for measuring actual sliding resistance coefficient of electric automobile by using VBOX equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405037C (en) * | 2005-02-18 | 2008-07-23 | 吴明 | Statistical method of system resistance based on road test and bench test about car in free running at neutral position |
| CN100595550C (en) * | 2005-08-16 | 2010-03-24 | 比亚迪股份有限公司 | Method for simulating inertia of car, and detecting car parameters |
| DE102011013022B3 (en) * | 2011-03-04 | 2012-08-30 | Audi Ag | Method for determining the running resistance of a vehicle |
| CN103983460B (en) * | 2014-04-29 | 2016-08-31 | 重庆长安汽车股份有限公司 | A kind of vehicle inner walkway method |
| CN107238501B (en) * | 2017-06-27 | 2020-11-24 | 北京新能源汽车股份有限公司 | Method and system for testing road sliding resistance of electric automobile |
-
2018
- 2018-01-23 CN CN201810063275.8A patent/CN108287076B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108287076A (en) | 2018-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108287076B (en) | Resistance curve testing method and device | |
| CN107238501B (en) | Method and system for testing road sliding resistance of electric automobile | |
| CN109357822B (en) | Bridge rapid testing and evaluating method based on time-varying power characteristic change of axle coupling system | |
| CN102323206B (en) | Method for measuring rolling resistance coefficient of vehicle | |
| CN102762970B (en) | Running-resistance control device | |
| CN103557976B (en) | A kind of measuring method of automobile running resistance | |
| CN111024404A (en) | Method, device, equipment and system for measuring vehicle road resistance | |
| CN107655700B (en) | Method and device for determining road sliding resistance | |
| Rabinovich et al. | Evaluation of the powertrain condition based on the car acceleration and coasting data | |
| CN116702096B (en) | Method and device for measuring and calculating road sliding resistance of vehicle plateau environment | |
| CN103134683B (en) | The system and method for vehicle motor exhaust brake test is carried out in indoor | |
| CN103376234B (en) | A kind of measuring method of rolling resistance coefficient of vehicle | |
| CN104678128A (en) | Automobile speedometer and odometer inspection-correction test system and method | |
| CN113607251B (en) | Vehicle load measuring method and device | |
| CN101363772B (en) | Method for measuring highest stabilizing speed of automobile | |
| CN104541123B (en) | Method and apparatus for asking for the girth of the tire on vehicle | |
| CN103376173B (en) | The measuring method of internal friction resistance during a kind of vehicle sliding | |
| CN114936343A (en) | Dynamic calculation method and device for electric vehicle mass | |
| CN109342078B (en) | Economical efficiency testing method, device and testing device for electric four-wheel drive vehicle | |
| CN101963519B (en) | Road test-simulated standard-state fuel consumption detection method based on bench test | |
| Shaw et al. | Instantaneous fuel consumption estimation using smartphones | |
| CN112197894A (en) | Method and system for acquiring average efficiency of gearbox based on whole vehicle | |
| CN108827509A (en) | Method and device for calculating road sliding resistance of electric automobile | |
| CN110987473B (en) | Distance correction method for transient fuel or waste gas of automobile bench test | |
| CN117890128B (en) | Method for testing running resistance of heavy vehicle under any load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |