CN112284588A - Test method and device for measuring vehicle efficiency value and vehicle - Google Patents
Test method and device for measuring vehicle efficiency value and vehicle Download PDFInfo
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- CN112284588A CN112284588A CN202011555449.6A CN202011555449A CN112284588A CN 112284588 A CN112284588 A CN 112284588A CN 202011555449 A CN202011555449 A CN 202011555449A CN 112284588 A CN112284588 A CN 112284588A
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- 238000012360 testing method Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 16
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- 238000000034 method Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
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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
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Abstract
The invention discloses a test method and a test device for measuring vehicle efficiency values and a vehicle, wherein the test method for measuring the vehicle efficiency values comprises the following steps: s1: controlling the rotation of wheels of the vehicle and maintaining the wheel state to keep a first variable; s2: controlling the opening degree of an accelerator pedal and acquiring a second variable of the wheel changing along with the opening degree of the accelerator pedal; s3: calculating the actual output power of the vehicle according to the first variable and the second variable; s4: acquiring the total output power of the vehicle and calculating the output efficiency of the vehicle; s5: changing the value of the first variable and repeating the steps S1, S2, S3 and S4; one of the first variable and the second variable is the rotational speed of the wheels, and the other is the torque of the wheels. According to the test method provided by the invention, the test method can better reflect the influence of all parts of the whole vehicle and is closer to the real working condition of the vehicle, so that the accuracy of measuring the efficiency value of the vehicle can be improved, and the suggestion for matching the power of the whole vehicle is more reliable.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a test method and a test device for measuring vehicle efficiency values and a vehicle.
Background
In the related art, the method for measuring the vehicle efficiency value is to directly measure the power of the motor and calculate according to the power of the motor and the total output power of the vehicle to obtain the output efficiency of the vehicle, but the method is simple in measurement, only measures the output power limited to the motor, neglects the influence of other factors on the actual output power of the vehicle, and cannot truly reflect the actual output power of the whole vehicle.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to propose a test method for measuring the efficiency value of a vehicle. The test method can reflect the influence of all parts of the whole vehicle and is closer to the real working condition of the vehicle, so that the accuracy of measuring the efficiency value of the vehicle can be improved, and the suggestion provided for matching the power of the whole vehicle is more reliable.
The invention also proposes a device for measuring the efficiency value of a vehicle.
The invention also provides a vehicle adopting the test method for measuring the vehicle efficiency value.
According to the test method and the test device for measuring the vehicle efficiency value and the vehicle, the test method for measuring the vehicle efficiency value comprises the following steps: s1: controlling the rotation of wheels of the vehicle and maintaining the wheel state to keep a first variable; s2: controlling the opening degree of an accelerator pedal and acquiring a second variable of the wheel changing along with the opening degree of the accelerator pedal; s3: calculating the actual output power of the vehicle according to the first variable and the second variable; s4: acquiring the total output power of the vehicle and calculating the output efficiency of the vehicle; s5: changing the value of the first variable and repeating the steps S1, S2, S3 and S4; wherein one of the first variable and the second variable is a rotational speed of the wheel and the other of the first variable and the second variable is a torque of the wheel.
According to the test method for measuring the vehicle efficiency value, the rotation speed of the wheel is controlled, the opening degree of the accelerator pedal is controlled to measure the torque of the wheel, the torque of the wheel under different opening degrees of the accelerator pedal is measured when the rotation speed of the wheel is constant, and the actual output power of the vehicle is calculated according to the rotation speed of the wheel and the torque of the wheel, so that the test method can reflect the actual output power of the vehicle more truly, and the accuracy of measuring the vehicle efficiency value is improved.
According to one embodiment of the invention, said obtaining the total output power of the vehicle comprises: measuring the output current I1 and the output voltage U1 of the power battery in the vehicle, and calculating the total output power P1 of the power battery in the vehicle according to the output current I1 and the output voltage U1 to be used as the output power of the whole vehicle.
According to one embodiment of the invention, said obtaining the total output power of the vehicle comprises: measuring an input current I2 and an input voltage U2 of a motor controller in the vehicle, and calculating the input power P2 of the motor controller according to the input current I2 and the input voltage U2 to serve as the output power of the whole vehicle.
According to one embodiment of the invention, the output voltage of a power battery of the vehicle is U1, the rated voltage of the power battery is U0, and the U1 satisfies the following conditions: u1 is more than or equal to U0+10V, which is more than or equal to U0-10V.
According to one embodiment of the invention, the temperature of the power battery in the vehicle and/or the motor controller in the vehicle and/or the motor of the vehicle is measured, said temperature being kept not greater than a preset temperature.
According to one embodiment of the invention, the test method for measuring vehicle efficiency rate further comprises: and if the first variable or the second variable fluctuates, stopping the test.
According to one embodiment of the invention, the test method for measuring vehicle efficiency values is characterized in that calculating the actual output power of the vehicle from the first variable and the second variable comprises; measuring a first variable and a second variable of a first wheel of the vehicle drive wheels, one of the first variable and the second variable of the first wheel being a torque T1 of the first wheel, the other of the first variable and the second variable of the first wheel being a rotational speed n1, a wheel-side output power of the first wheel being P1= T1 n 1/9550; measuring a first variable and a second variable of a second one of the vehicle drive wheels, one of the first variable and the second variable of the second wheel being a torque T2, the other of the first variable and the second variable of the second wheel being a rotational speed n2, the wheel-side output power of the second wheel being P2= T2 n 2/9550; the actual output power of the vehicle is P0, the P0= P1+ P2.
An apparatus for measuring an efficiency value of a vehicle according to the present invention is described below.
The device for measuring the efficiency value of the vehicle comprises a dynamometer, an accelerator pedal opening degree control device, a vehicle output power testing device and a data acquisition device, wherein the dynamometer is connected with wheels of the vehicle and is suitable for controlling and measuring a first variable and a second variable of the wheels; the accelerator pedal opening control device is suitable for simulating control signals of an accelerator pedal under different opening degrees so as to enable the vehicle to change a second variable of the wheel after receiving the control signals; the vehicle output power testing device is suitable for detecting the output power of the vehicle; the data acquisition device is respectively and electrically connected with the dynamometer, the accelerator pedal opening degree control device and the vehicle output power testing device so as to be suitable for acquiring the first variable, the second variable, the accelerator pedal opening degree and the output power of the vehicle.
According to the device for measuring the vehicle efficiency value, the device measures the torque of the wheel by controlling the rotating speed of the wheel and controlling the opening degree of the accelerator pedal so as to measure the torque of the wheel under different opening degrees of the accelerator pedal when the rotating speed of the wheel is constant, and calculates the actual output power of the vehicle according to the rotating speed of the wheel and the torque of the wheel, so that the test method can reflect the actual output power of the vehicle more truly, and the accuracy of measuring the vehicle efficiency value is improved.
A vehicle according to the present invention is described below.
The vehicle comprises a power battery, a motor controller, a motor, a transmission assembly and wheels, wherein the motor controller is electrically connected with the power battery; the motor is controlled by a motor controller, and the motor controller is suitable for controlling the input power of the motor; the transmission assembly is linked with the output end of the motor, and the motor drives the transmission assembly to move so as to improve the power for the movement of the transmission assembly; the through wheel is linked with the output end of the transmission assembly, and the transmission assembly is arranged between the motor and the wheel so as to transmit the output power of the motor to the wheel and enable the vehicle to run.
According to the vehicle, the actual output power of the vehicle can be reflected more truly by adopting the test method for measuring the vehicle efficiency value, the accuracy of measuring the vehicle efficiency value is improved, and the suggestion for matching the whole vehicle power is more reliable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a test method of measuring vehicle efficiency values according to the present invention;
FIG. 2 is a schematic illustration of a vehicle according to the present invention;
FIG. 3 is a graph of experimental test condition data according to the present invention;
FIG. 4 is a MAP of overall vehicle efficiency obtained according to the test method of the present invention.
Reference numerals:
The power battery 10, the motor controller 20, the motor 30, the transmission assembly 60, the first wheel 40 and the second wheel 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A test method for measuring vehicle efficiency values according to an embodiment of the present invention is described below with reference to fig. 1-4.
The test method for measuring vehicle efficiency rate according to the present invention includes the steps of, S1: controlling the rotation of wheels of the vehicle and maintaining the wheel state to keep a first variable; s2: controlling the opening degree of an accelerator pedal and acquiring a second variable of the wheel changing along with the opening degree of the accelerator pedal; s3: calculating the actual output power of the vehicle according to the first variable and the second variable; s4: acquiring the total output power of the vehicle and calculating the output efficiency of the vehicle; s5: changing the value of the first variable and repeating the steps S1, S2, S3 and S4; wherein one of the first variable and the second variable is the rotation speed of the wheel, and the other of the first variable and the second variable is the torque of the wheel.
It will be appreciated that where the first variable is the speed of the wheels and the second variable is the torque of the wheels, the method comprises the steps of: s1: controlling the rotation speed of the wheels to maintain the rotation speed of the wheels at a certain fixed rotation speed; s2: the method comprises the steps of measuring the torque of a wheel according to the change of the opening degree of an accelerator pedal by controlling the opening degree change of the accelerator pedal, namely the change of the opening degree of the accelerator pedal corresponds to different torques of the wheel; s3: after the torque of the wheel is measured and obtained, calculating the corresponding actual output power of the vehicle according to the torque of the wheel and the rotating speed of the wheel; s4: acquiring the total output power and the actual output power of the vehicle, and calculating the total output power and the actual output power to obtain the output efficiency of the vehicle; s5: and changing the rotating speed value of the wheel, repeating the steps S1, S2, S3 and S4, and calculating the efficiency of the vehicle under any working condition by changing the rotating speed value of the wheel, so that the measurement of the vehicle efficiency value is more accurate and comprehensive.
Further, when the first variable is a torque of the wheel and the second variable is a rotational speed of the wheel, the method comprises the steps of: s1: controlling the torque of the wheels to maintain the torque of the wheels at a certain fixed value; s2: the method comprises the steps of measuring the rotating speed of a wheel by controlling the opening change of an accelerator pedal and according to the opening change of the accelerator pedal, wherein the opening change of the accelerator pedal corresponds to different rotating speeds of the wheel; s3: after the rotating speed of the wheel is measured and obtained, calculating the corresponding actual output power of the vehicle according to the torque of the wheel and the rotating speed of the wheel; s4: acquiring the total output power and the actual output power of the vehicle, and calculating the total output power and the actual output power to obtain the output efficiency of the vehicle; s5: and changing the torque value of the wheel, repeating the steps S1, S2, S3 and S4, and calculating the output efficiency of the vehicle under any working condition by changing the torque value of the wheel, so that the measurement of the output efficiency of the vehicle is more accurate and comprehensive.
In the related art, the method for measuring the vehicle efficiency value directly measures the power of the motor, and calculates according to the power of the motor and the total output power of the vehicle to obtain the output efficiency of the vehicle, but the method is simple in measurement, only measures the output power limited to the motor, neglects the influence of other factors on the actual output power of the vehicle, and cannot truly reflect the actual output power of the vehicle.
According to the test method for measuring the vehicle efficiency value, the rotation speed of the wheel is controlled, the opening degree of the accelerator pedal is controlled to measure the torque of the wheel, the torque of the wheel under different opening degrees of the accelerator pedal is measured when the rotation speed of the wheel is constant, and the actual output power of the vehicle is calculated according to the rotation speed of the wheel and the torque of the wheel, so that the test method can reflect the actual output power of the vehicle more truly, and the accuracy of measuring the vehicle efficiency value is improved.
According to one embodiment of the present invention, obtaining the total output power of the vehicle includes: measuring the output current I1 and the output voltage U1 of a power battery in the vehicle, and calculating the total output power P1 of the power battery in the vehicle as the output power of the whole vehicle according to the output current I1 and the output voltage U1, wherein P1= U1I 1.
The power battery is used as a direct power supply of the power and power system of the whole vehicle, the output current I1 and the output voltage U1 of the power battery in the vehicle are directly measured, and the total output power P1 of the power battery in the vehicle is calculated according to the output current I1 and the output voltage U1 to be used as the output power of the whole vehicle, so that the energy loss of the power battery in the transmission process and the power system is avoided being ignored, and the reality of obtaining the total output power of the vehicle is improved.
According to one embodiment of the present invention, obtaining the total output power of the vehicle includes: measuring an input current I2 and an input voltage U2 of a motor controller in the vehicle, and calculating input power P2 of the motor controller according to the input current I2 and the input voltage U2 to serve as output power of the whole vehicle, wherein P2= U2I 2.
The motor controller can directly control an input motor of a vehicle, the output power of the motor controller is equivalent to the input power of the vehicle in the motion process, the input current I2 and the input voltage U2 of the motor controller are measured, and the input power P2 of the motor controller is calculated according to the input current I2 and the input voltage U2 to serve as the output power of the whole vehicle, so that the loss of a power utilization system of the vehicle is ignored, the influence of the power utilization system on the measurement of the total output power of the vehicle is avoided, and the accuracy of the measurement of the total output power of the vehicle is improved.
According to one embodiment of the invention, the output voltage of the power battery of the vehicle is U1, the rated voltage of the power battery is U0, and U1 meets the following requirements: u1 is more than or equal to U0+10V, which is more than or equal to U0-10V. The relation between the rated voltage U0 and the output voltage U1 of the power battery is constructed to satisfy: u1 is more than or equal to U0+10V between U0 and 10V, so that the output voltage U0 of the battery is controlled within the voltage range of rated voltage U1 +/-10V, the stable output of the output voltage U1 of the battery is ensured, and the safety performance of the power battery in the discharging process of the vehicle is improved.
According to one embodiment of the invention, the temperature of the power battery in the vehicle and/or the motor controller in the vehicle and/or the motor of the vehicle is measured, maintaining the temperature not greater than a preset temperature.
It can be understood that the preset temperature can be set as a safe temperature, wherein the vehicle is rapidly cooled down by measuring the temperature of at least one of the power battery, the motor controller and the motor in the vehicle and comparing the measured temperature with the preset temperature in real time, and when the measured temperature is greater than or equal to the preset temperature, the test is stopped, and the test is continued after the vehicle is cooled down, that is, the test method needs to keep the measured temperature below the preset temperature to ensure the safety in the test process.
In this embodiment, the temperatures of the power battery, the motor controller and the motor need to be measured, so that the temperature of the power battery, the temperature of the motor controller and the temperature of the motor are all smaller than the preset temperature, and when any one of the temperature of the power battery, the temperature of the motor controller and the temperature of the motor is larger than the preset temperature, the test needs to be stopped, so that the vehicle is rapidly cooled, and the safety in the vehicle test process is further improved.
According to one embodiment of the invention, the test method for measuring vehicle efficiency values further comprises: and if the first variable or the second variable fluctuates, stopping the test. It can be understood that when the first variable or the second variable fluctuates frequently or deviates from a normal value, the test of the vehicle efficiency value is abnormal, the vehicle speed needs to be stopped immediately, the reason needs to be found out, the vehicle is ensured to be in a normal state, and the accuracy of measuring the vehicle efficiency value is improved, and meanwhile, the vehicle is protected.
According to one embodiment of the invention, calculating the actual output power of the vehicle from the first variable and the second variable comprises; measuring a first variable and a second variable of a first wheel of driving wheels of the vehicle, wherein one of the first variable and the second variable of the first wheel is torque T1 of the first wheel, the other one of the first variable and the second variable of the first wheel is rotating speed n1, and the wheel-side output power of the first wheel is P1= T1 n 1/9550; measuring a first variable and a second variable of a second wheel of the driving wheels of the vehicle, wherein one of the first variable and the second variable of the second wheel is torque T2, the other one of the first variable and the second variable of the second wheel is rotating speed n2, and the wheel-side output power of the second wheel is P2= T2 n 2/9550; the actual output power of the vehicle is P0, P0= P1+ P2. The rotating speed n1 of the first wheel is equal to the rotating speed n2 of the second wheel, namely the actual output power P0= (T1 + T2) × n1/9550 of the vehicle, and the wheel output power of the whole vehicle is used as the actual output power of the vehicle, so that the influence of all parts of the whole vehicle can be reflected, and the actual working condition of the vehicle is closer to the actual working condition of the vehicle.
An apparatus for measuring an efficiency value of a vehicle according to the present invention is described below.
The device for measuring the efficiency value of the vehicle comprises a dynamometer, an accelerator pedal opening degree control device, a vehicle output power testing device and a data acquisition device, wherein the dynamometer is connected with wheels of the vehicle and is suitable for controlling and measuring a first variable and a second variable of the wheels; the accelerator pedal opening control device is suitable for simulating control signals of an accelerator pedal under different opening degrees so as to enable the vehicle to change a second variable of the wheel after receiving the control signals; the vehicle output power testing device is suitable for detecting the output power of the vehicle; the data acquisition device is respectively and electrically connected with the dynamometer, the accelerator pedal opening degree control device and the vehicle output power testing device so as to be suitable for acquiring the first variable, the second variable, the accelerator pedal opening degree and the output power of the vehicle.
Specifically, the dynamometer is used for controlling the rotation of wheels of the vehicle, maintaining the state of the wheels to keep a first variable and obtaining the value of the first variable, the accelerator pedal opening control device is suitable for simulating control signals of an accelerator pedal under different opening degrees, the control signals of the accelerator pedal opening degrees can be respectively set to be 0%, 5% and 10% (progressive 5% or progressive values selected according to actual requirements) … … 100%, and the time under each opening degree is not less than 10s, so that stable data can be obtained, and accidental tests can be avoided.
Furthermore, the opening degree of the accelerator pedal is set to be controllable and changed, so that the vehicle can change a second variable of the wheel after receiving the control signal to simulate all working conditions of the vehicle; the vehicle output power testing device is suitable for acquiring a first variable and a second variable and calculating the output power of the vehicle according to the first variable and the second variable, wherein the data acquisition device is respectively electrically connected with the dynamometer, the accelerator pedal opening degree control device and the vehicle output power testing device and is used for acquiring the first variable, the second variable, the accelerator pedal opening degree and the output power of the vehicle and correspondingly obtaining the change relation of the whole vehicle efficiency in the whole working range according to the acquired data.
According to the device for measuring the vehicle efficiency value, the device measures the torque of the wheel by controlling the rotating speed of the wheel and controlling the opening degree of the accelerator pedal so as to measure the torque of the wheel under different opening degrees of the accelerator pedal when the rotating speed of the wheel is constant, and calculates the actual output power of the vehicle according to the rotating speed of the wheel and the torque of the wheel, so that the test method can reflect the actual output power of the vehicle more truly, and the accuracy of measuring the vehicle efficiency value is improved.
The following describes a vehicle 1 according to the invention.
The vehicle 1 according to the present invention includes a power battery 10, a motor controller 20, a motor 30, a transmission assembly 60, and wheels, the motor controller 20 being electrically connected with the power battery 10; the motor 30 is controlled by a motor controller 20, the motor controller 20 being adapted to control the input power of the motor 30; the transmission assembly 60 is linked with the output end of the motor 30, and the motor 30 drives the transmission assembly 60 to move so as to provide power for the movement of the transmission assembly 60; the wheel is linked with the output end of the transmission assembly 60, and the transmission assembly 60 is disposed between the motor 20 and the wheel to transmit the output power of the motor 30 to the wheel for driving the vehicle.
According to the vehicle 1, the actual output power of the vehicle can be reflected more truly by adopting the test method for measuring the vehicle efficiency value, the accuracy of measuring the vehicle efficiency value is improved, and the suggestion for matching the whole vehicle power is more reliable.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A test method for measuring vehicle efficiency values, comprising:
s1: controlling rotation of a wheel of the vehicle and maintaining a state of the wheel to maintain a first variable;
s2: controlling the opening degree of an accelerator pedal to change and acquiring a second variable of the wheel changing along with the opening degree of the accelerator pedal;
s3: calculating the actual output power of the vehicle according to the first variable and the second variable;
s4: acquiring the total output power of the vehicle and calculating the output efficiency of the vehicle;
s5: changing the value of the first variable and repeating the steps S1, S2, S3 and S4; wherein
One of the first variable and the second variable is a rotational speed of the wheel, and the other of the first variable and the second variable is a torque of the wheel.
2. A test method of measuring vehicle efficiency values as claimed in claim 1, wherein said obtaining a total output power of said vehicle comprises:
measuring the output current I1 and the output voltage U1 of the power battery in the vehicle, and calculating the total output power P1 of the power battery in the vehicle according to the output current I1 and the output voltage U1 to be used as the output power of the whole vehicle.
3. A test method of measuring vehicle efficiency values as claimed in claim 1, wherein said obtaining a total output power of said vehicle comprises:
measuring an input current I2 and an input voltage U2 of a motor controller in the vehicle, and calculating the input power P2 of the motor controller according to the input current I2 and the input voltage U2 to serve as the output power of the whole vehicle.
4. A test method for measuring vehicle efficiency rate according to any of claims 1-3, characterized in that the output voltage of the vehicle's power battery is U1, the power battery's rated voltage is U0, the U1 satisfies: u1 is more than or equal to U0+10V, which is more than or equal to U0-10V.
5. A test method for measuring vehicle efficiency rate according to any of the claims 1-3, characterized in that the temperature of the power battery in the vehicle and/or the motor controller in the vehicle and/or the motor of the vehicle is measured, said temperature being kept not higher than a preset temperature.
6. A test method for measuring vehicle efficiency rates as claimed in any one of claims 1-3, further comprising: and if the first variable or the second variable fluctuates, stopping the test.
7. A test method of measuring a vehicle efficiency rate according to any of claims 1-3, characterized in that calculating the actual output power of the vehicle from the first and second variables comprises;
measuring a first variable and a second variable of a first wheel of the vehicle drive wheels, one of the first variable and the second variable of the first wheel being a torque T1 of the first wheel, the other of the first variable and the second variable of the first wheel being a rotational speed n1, a wheel-side output power of the first wheel being P1= T1 n 1/9550;
measuring a first variable and a second variable of a second one of the vehicle drive wheels, one of the first variable and the second variable of the second wheel being a torque T2, the other of the first variable and the second variable of the second wheel being a rotational speed n2, the wheel-side output power of the second wheel being P2= T2 n 2/9550;
the actual output power of the vehicle is P0, the P0= P1+ P2.
8. An apparatus for measuring efficiency values of a vehicle, the apparatus being adapted to a test method for measuring efficiency values of a vehicle according to any one of claims 1 to 7, comprising:
a dynamometer coupled to a wheel of the vehicle and adapted to control and measure a first variable and a second variable of the wheel;
the accelerator pedal opening control device is suitable for simulating control signals of the accelerator pedal under different opening degrees so as to enable the vehicle to change a second variable of the wheel after receiving the control signals;
a vehicle output power test device adapted to detect an output power of the vehicle;
the data acquisition device is respectively and electrically connected with the dynamometer, the accelerator pedal opening degree control device and the vehicle output power testing device so as to be suitable for acquiring the first variable, the second variable, the accelerator pedal opening degree and the output power of the vehicle.
9. A vehicle to which a test method of measuring vehicle efficiency rate as claimed in any one of claims 1 to 7 is applied, comprising:
a power battery;
the motor controller is electrically connected with the power battery;
a motor controlled by the motor controller;
the transmission assembly is linked with the output end of the motor;
and the wheel is linked with the output end of the transmission assembly.
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| CN114112141A (en) * | 2021-11-22 | 2022-03-01 | 吉林大学重庆研究院 | Method for classifying parasitic power of vehicle and method for measuring unnecessary parasitic power |
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