CN112179675A - Method and device for testing dragging energy consumption of electric automobile calipers - Google Patents
Method and device for testing dragging energy consumption of electric automobile calipers Download PDFInfo
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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- G—PHYSICS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The embodiment of the application provides a method and a device for testing dragging energy consumption of calipers of an electric vehicle, and the method comprises the following steps: loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and testing the driving mileage of the electric automobile without the friction plate removed, which consumes the preset electric quantity; loading a preset resistance and a preset speed per hour on the electric automobile with the friction plate removed, and testing the driving mileage of the electric automobile with the friction plate removed, which consumes a preset electric quantity; and solving the driving mileage difference when the electric automobile with the friction plate removed and the electric automobile without the friction plate removed consume unit electric quantity. The testing device comprises a rotary hub test bed, a controller and a display. The controller is used for respectively acquiring the driving mileage difference of the electric automobile to be tested in the two states of not removing the friction plate and removing the friction plate when the unit electric quantity is consumed under the preset resistance and the preset speed per hour; the display is electrically connected with the controller for displaying the result. The influence of the dragging resistance of the calipers on the endurance of the whole vehicle can be accurately tested, and the performance test effect is effectively improved.
Description
Technical Field
The application belongs to the technical field of electric automobile energy consumption testing, and particularly relates to a method and a device for testing dragging energy consumption of electric automobile calipers.
Background
The energy consumption of the electric automobile comprises the consumption of electric appliances and the consumption of work overcoming various resistances.
The resistance comprises wind resistance, rolling resistance and internal resistance. The internal resistance refers to resistance force resisting rotation of the transmission, the transmission shaft and the wheels, and the resistance force mainly comprises friction force.
The drag resistance of a caliper in an electric vehicle is a department of internal resistance, and is a frictional resistance which is generated by the friction between a friction plate and a brake disc and hinders the rotation of wheels.
The method aims at the problem that the accuracy of the energy consumption consumed by testing the dragging resistance of the calipers of the electric automobile is not ideal at present when the electric automobile runs at a constant speed.
Disclosure of Invention
The application aims to provide a method and a device for testing dragging energy consumption of calipers of an electric vehicle, so as to improve the problems.
The embodiment of the application can be realized as follows:
in a first aspect, a method for testing dragging energy consumption of calipers of an electric vehicle is provided, which includes: loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and testing the driving mileage of the electric automobile without the friction plate removed, which consumes the preset electric quantity; loading a preset resistance and a preset speed per hour on the electric automobile with the friction plate removed, and testing the driving mileage of the electric automobile with the friction plate removed, which consumes a preset electric quantity; and calculating the driving mileage difference when the electric automobile with the friction plate removed and the electric automobile without the friction plate removed consume unit electric quantity.
Further, to not demolising the electric automobile loading of friction disc predetermine resistance and predetermine the speed per hour, the electric automobile that the friction disc was not demolishd in the test consumes the mileage of predetermineeing the electric quantity and includes: driving the electric automobile without the friction plate removed to a hub rotating test bed; loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and driving at a constant speed per hour; and testing the driving mileage of the electric automobile without the friction plate removed, wherein the driving mileage consumes the preset electric quantity under the conditions of preset resistance and preset speed per hour.
Further, to predetermineeing resistance and predetermineeing the speed per hour to the electric automobile loading of demolising the friction disc, the electric automobile who demolishs the friction disc of test consumes the mileage of predetermineeing the electric quantity and includes: driving the electric automobile with the friction plate removed to a hub rotating test bed; loading preset resistance and preset speed per hour on the electric automobile with the friction plate removed, and driving at a constant speed per hour; and testing the driving mileage of the electric automobile with the friction plate removed by the test, wherein the driving mileage consumes the preset electric quantity under the conditions of preset resistance and preset speed per hour.
Further, before loading a preset resistance and a preset speed per hour on the electric automobile without the friction plate removed, the method further comprises the following steps: fully charging the electric automobile without the friction plate removed; before the electric automobile that demolishs the friction disc load and predetermine resistance and predetermine the speed per hour still include: and fully charging the electric automobile with the friction plate removed.
Further, the preset electric quantity comprises all electric quantities; the driving mileage difference of the electric automobile with the friction plate removed and the electric automobile without the friction plate removed when consuming unit electric quantity comprises the following steps: testing the driving mileage of the electric automobile without the friction plate removed as a first driving mileage under the conditions of preset resistance and preset speed per hour; testing the driving mileage of the electric automobile with the friction plate removed as a second driving mileage under the conditions of preset resistance and preset speed per hour; calculating the difference value between the second driving range and the first driving range as a total mileage difference; and calculating the ratio of the total mileage difference to all the electric quantities to be the driving mileage difference when consuming unit electric quantity.
Further, still include before electric automobile load that demolishs the friction disc predetermines resistance and predetermine the speed per hour: and (4) detaching friction plates of front and rear wheels of the electric automobile.
Further, before removing the friction plates of the front and rear wheels of the electric automobile, the method further comprises the following steps: a stopper is installed on the brake pedal bracket to limit the distance the brake pedal moves downward.
Further, the preset speed per hour comprises a plurality of different speed per hour, and the driving mileage difference between the electric automobile with the friction plate removed and the electric automobile without the friction plate removed when unit electric quantity is consumed is calculated and obtained at the plurality of different speed per hour.
In a second aspect, the dragging energy consumption testing device for the calipers of the electric automobile comprises a hub rotating test bed, a controller and a display, wherein the hub rotating test bed is used for bearing the electric automobile to be tested; the controller is used for acquiring the driving mileage difference of the electric automobile to be tested when unit electric quantity is consumed under two states of not removing the friction plate and removing the friction plate respectively by adopting an electric automobile caliper dragging energy consumption testing method under the preset resistance and the preset speed per hour; the display is electrically connected with the controller and used for displaying the driving mileage difference when the electric automobile to be tested consumes unit electric quantity and at least one of consumed electric quantity, residual electric quantity and driving mileage under two states of not removing the friction plate and removing the friction plate.
Further, still include the locating part, the locating part include the installation department and with installation department fixed connection's spacing portion, the installation department be used for with wait to detect electric automobile's brake pedal support fixed connection, spacing portion is used for the restriction to wait to detect electric automobile's brake pedal distance that moves down.
According to the method for testing dragging energy consumption of the electric automobile calipers, the preset resistance and the preset speed per hour are respectively loaded when the electric automobile to be tested is in the two states of not removing the friction plate and removing the friction plate, the driving mileage of the electric automobile in the situation of consuming the preset electric quantity is tested, and the driving mileage difference of the electric automobile in the situation of consuming unit electric quantity in the two states of not removing the friction plate and removing the friction plate is obtained. The influence of the calipers dragging resistance on the endurance of the whole vehicle can be relatively accurately tested, the performance test effect is effectively improved, the test result is more targeted, and the energy consumption test analysis result of the electric vehicle calipers dragging and the occupation ratio of the energy consumption test analysis result in the whole vehicle energy consumption are conveniently separated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a flowchart of a method for testing dragging energy consumption of an electric vehicle caliper according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a step S110 in a method for testing a caliper dragging energy consumption of an electric vehicle according to an embodiment of the present application;
fig. 3 is a flowchart illustrating a step S120 in a method for testing a caliper dragging energy consumption of an electric vehicle according to an embodiment of the present application;
fig. 4 is a flowchart illustrating a step S130 in a method for testing a caliper dragging energy consumption of an electric vehicle according to an embodiment of the present application;
fig. 5 is a block diagram of a structure of a device for testing dragging energy consumption of an electric vehicle caliper according to an embodiment of the present application;
fig. 6 is a specific structural block diagram of an electric vehicle caliper dragging energy consumption testing device provided in the embodiment of the present application;
fig. 7 is a schematic structural diagram of a limiting member in the device for testing dragging energy consumption of calipers of an electric vehicle according to the embodiment of the present application;
FIG. 8 is a schematic structural diagram of a limiting member mounted on a caliper of an electric vehicle to be tested;
fig. 9 is a schematic structural view of the limiting member and the brake pedal bracket being fixedly connected.
Icon: 110-a controller; 111-a resistance loading module; 113-speed loading module; 115-a power control module; 117-mileage test module; 120-a display; 130-brake pedal; 140-a stop; 142-a mounting portion; 144-a limiting part; 150-brake pedal bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
The electric vehicle (BEV) is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor, and meets various requirements of road traffic and safety regulations. The energy consumption of the electric automobile comprises the energy consumption of an electric appliance and the energy consumption for overcoming various resistances to do work, wherein the resistances are friction force which is generated by friction between a friction plate and a brake disc and hinders the rotation of wheels in the driving process of the electric automobile.
According to QC/T592-: the brake caliper assembly is tested according to the method steps in the 5.3 drag torque test, wherein the brake disc rotates at 50r/min, and the maximum value of the drag torque is less than or equal to 5 N.m.
In order to test the automobile energy consumption consumed by dragging of the calipers of the electric automobile in the process of constant-speed running of the electric automobile, the brake caliper assembly performance of the electric automobile can be tested by using the bench by adopting the method specified in the national standard QC/T592-. In other words, the chuck can be tested by using the bench, and then the final performance test result can be obtained through simulation calculation. Specifically, the caliper can be removed from the electric vehicle and then mounted on a bench for testing to obtain the drag torque value of the caliper. And then, the dragging torque value of the caliper is brought into the simulation calculation of the whole vehicle energy consumption of the electric vehicle, and the whole vehicle energy consumption dragged by the caliper is calculated.
However, the results of the test using the above test method are not ideal, and the inventors have found through analysis that the above test method has certain one-sidedness:
firstly, the rotating speed of the rack is lower, and the rotating speed of the rack is about 5km/h when the whole vehicle speed of the electric vehicle is about because the rack is driven by a motor. The dragging energy consumption of the region near the speed of 5km/h can be detected only through the rack, and the rack cannot accurately detect the speed of the whole electric automobile under other speed working conditions.
Secondly, the installation of the caliper and the brake disc on the bench is different from the installation environment of the caliper and the brake disc on the whole vehicle. Because the whole vehicle has the shaking condition in the driving process, the numerical value of the actual caliper dragging torque on the whole vehicle is larger than the numerical value tested by adopting the rack. However, the actual caliper dragging torque of the whole vehicle has a specific numerical value, and an ideal test method is not provided, so that a relatively accurate numerical value is obtained.
In view of the above problems, referring to fig. 1, an embodiment of the present application provides a method for testing dragging energy consumption of an electric vehicle caliper.
As an embodiment, the method can be applied to an electric vehicle in which both front and rear brakes are disc brakes, and the following description will be given in detail by taking an electric vehicle in which both front and rear brakes are disc brakes as an example.
As can be seen from fig. 1, the method for testing the dragging energy consumption of the caliper of the electric vehicle may include steps S110 to S130.
Step S110: and loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and testing the driving mileage of the electric automobile without the friction plate removed, which consumes the preset electric quantity.
Under the condition that the friction plate of the electric automobile is not removed, the resistance loading module in the controller is used for carrying out resistance loading on the electric automobile, and the resistance is loaded to the preset resistance; meanwhile, the electric vehicle is speed loaded in the on state through a speed loading module in the controller, and the speed is loaded to a preset speed, for example, 60 km/h. Under the working conditions of preset resistance and preset speed per hour, testing the electric quantity consumed by the electric automobile after the electric automobile is started for a period of time through an electric quantity control module in a controller; and when the electric quantity consumed by the electric automobile is the preset electric quantity, the driving mileage of the electric automobile is tested through a driving mileage testing module in the controller. Therefore, the driving mileage of the electric automobile consuming the preset electric quantity under the state that the friction plate is not removed is obtained.
It should be noted that the preset resistance and the preset speed per hour can be adjusted according to the test requirements, and the actual adjustment can be performed by adjusting the preset resistance and the preset speed per hour independently or by adjusting the preset resistance and the preset speed per hour simultaneously. So that the working condition after adjustment is different from the preset resistance in the working condition before adjustment, but the preset speed per hour is the same; the preset resistances are the same, but the preset speeds are different; and the preset resistance is different, and the preset speed is also different, so that the driving mileage value of the consumed preset electric quantity is obtained through testing under the condition that the friction plate of the electric automobile is not removed and under the working conditions of the adjusted preset resistance and the adjusted preset speed.
In the embodiment of the present application, the test on the electric vehicle is performed on a test bench, the specific flow is shown in fig. 2, and it can be seen from fig. 2 that step S110 may include step S111 to step S113, which are detailed as follows:
step S111: and (5) driving the electric automobile without the friction plate removed to a hub rotating test bed.
And detecting the mileage value of the electric automobile driven by the consumed preset electric quantity under the complete machine state without removing the friction plate and under a preset working condition. Firstly, the electric automobile without the friction plate removed runs to a test bed, the test bed can be a rotating hub test bed, and an experimental area is provided for the test of the electric automobile through the rotating hub test bed.
Step S112: and loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and enabling the electric automobile to run at the preset speed per hour at a constant speed.
The resistance loading module in the controller loads resistance on the electric automobile, and the resistance is loaded to the preset resistance. Meanwhile, the electric vehicle is loaded with the speed through a speed loading module in the controller, and the speed is loaded to a preset speed, for example, the preset speed per hour may be 60 km/h. Under the working condition that the preset resistance and the preset speed per hour are kept constant, the electric automobile is enabled to run at a constant speed per hour.
Step S113: and testing the driving mileage of the electric automobile without the friction plate removed, wherein the driving mileage consumes the preset electric quantity under the working conditions of preset resistance and preset speed per hour.
And detecting the electric quantity consumed by the electric automobile through the electric quantity control module under the working condition that the preset resistance and the preset speed per hour are loaded and the electric automobile uniformly runs at the preset speed per hour for the electric automobile without the friction plate being removed. When the electric quantity consumes the preset electric quantity or the electric quantity is consumed to the preset electric quantity, the driving mileage value of the electric automobile which consumes the preset electric quantity is tested through the driving mileage testing module.
It should be noted that the preset electric quantity may include a unit electric quantity, a plurality of unit electric quantities, or all electric quantities, and the driving mileage value of the electric vehicle is different when the preset electric quantities are different at the same preset resistance and preset speed per hour.
Step S120: and loading a preset resistance and a preset speed per hour on the electric automobile with the friction plate removed, and testing the driving mileage of the electric automobile with the friction plate removed, which consumes the preset electric quantity.
The test object in step S120 is an electric vehicle with the friction plate removed. That is, the electric vehicle in step S120 is in a state after the friction plate of the electric vehicle in step S110 is removed. And respectively testing the same electric automobile in two states of not removing the friction plate and removing the friction plate.
Step S120, carrying out resistance loading on the electric automobile in the state by a resistance loading module in the controller under the complete state of the electric automobile after the friction plate is removed, and loading the resistance to a preset resistance; meanwhile, the electric vehicle in the state is subjected to speed loading in the starting state through a speed loading module in the controller, and the speed is loaded to a preset speed, for example, 60 km/h. Under the working condition that the preset resistance and the preset speed per hour are respectively the same as the preset resistance and the preset speed of the electric automobile in the state that the friction plate is not removed, testing the consumed electric quantity of the electric automobile in the state after the electric automobile is started for a period of time through the electric quantity control module; and when the electric quantity consumed by the electric automobile is the preset electric quantity, the driving mileage of the electric automobile is tested by the driving mileage testing module, so that the driving mileage of the electric automobile consuming the preset electric quantity in the state that the friction plate is removed is obtained.
It should be noted that the loading resistance and the loading speed of the electric vehicle in step S120 and the loading resistance and the loading speed of the electric vehicle in step S110 are respectively the same, so as to ensure that the parameter conditions tested by the electric vehicle in the two different states are completely the same.
The specific flow of the electric vehicle in this state is shown in fig. 3, and it can be seen from fig. 3 that step S120 may include steps S121 to S123, which are detailed as follows:
step S121: and (5) driving the electric automobile with the friction plate removed to a rotating hub test bed.
The purpose and function of step S121 and step S111 are the same.
Step S122: and loading a preset resistance and a preset speed per hour on the electric automobile with the friction plate removed, and enabling the electric automobile to run at a constant speed per hour.
And loading resistance on the electric automobile in the state through a resistance loading module in the controller, and loading the resistance to a preset resistance. The electric vehicle in this state is loaded with the speed by the speed loading module in the controller, and the speed is loaded to a preset speed, for example, the preset speed per hour may be 60 km/h. Under the working conditions of preset resistance and certain preset speed per hour, the electric automobile with the friction plate removed runs at a constant speed per hour.
Step S123: and testing the driving mileage of the electric automobile with the friction plate removed by the test, wherein the driving mileage consumes the preset electric quantity under the conditions of preset resistance and preset speed per hour.
The electric automobile with the friction plate removed is loaded with the preset resistance and the preset speed per hour, under the working condition that the electric automobile uniformly runs at the preset speed per hour, the electric quantity consumed by the electric automobile in the state is detected through the electric quantity control module, and when the electric quantity is consumed to the preset electric quantity, the mileage value consumed by the preset electric quantity is tested through the driving mileage testing module.
It should be noted that, in step S123 and step S113, the preset electric quantity is the same, the preset resistance and the preset speed per hour are also respectively the same, and under the completely same working condition, the driving mileage of the electric vehicle is different between the state where the friction plate is not removed and the state where the friction plate is removed. And according to the test result, the driving mileage value of the electric automobile in the state of removing the friction plate is larger than the driving mileage value of the electric automobile in the state of not removing the friction plate, and in addition, the difference value between the driving mileage value obtained in the step S120 and the driving mileage value obtained in the step S110 is the whole automobile driving mileage influenced by the caliper drag of the electric automobile.
Step S130: and solving the driving mileage difference when the electric automobile with the friction plate removed and the electric automobile without the friction plate removed consume unit electric quantity.
Aiming at the condition that the electric automobile is at the preset resistance and the preset speed per hour (60km/h), the driving mileage difference when unit electric quantity is consumed can be calculated and obtained according to the driving mileage value and the consumed preset electric quantity when the electric automobile consumes the preset electric quantity in different states.
Namely, the difference between the driving range value in the step S120 and the driving range value in the step S110 is divided by the preset electric quantity consumed in the test process, so that the driving range value influenced by the caliper drag resistance corresponding to each unit electric quantity consumed by the electric vehicle when the vehicle speed is 60km/h can be obtained.
The method for testing the dragging energy consumption of the calipers of the electric automobile can be used for measuring the energy consumption consumed by the consumption of preset electric quantity when the electric automobile runs at a constant speed and the energy consumption consumed by the dragging of the calipers when unit electric quantity is consumed when the electric automobile runs at a constant speed. In other words, aiming at the fact that the energy consumption of the electric automobile dragged by the caliper and the proportion of the energy consumption of the electric automobile in the energy consumption of the whole automobile can be separated in the process of driving the electric automobile at a constant speed, the measured value is enabled to be closer to a real working condition value, and the accuracy of the measured value is improved.
As another embodiment, before the electric vehicle without the friction plate removed is loaded with the preset resistance and the preset speed per hour, the method further comprises the following steps: and fully charging the electric automobile without the friction plate removed, namely fully charging.
Before the electric automobile that demolishs the friction disc load and predetermine resistance and predetermine the speed per hour still include: and fully charging the electric automobile with the friction plate removed, namely fully charging.
In a fully charged state of the electric vehicle, the preset electric quantity may include all electric quantities. When the electric automobile is in two different states of not removing the friction plate and removing the friction plate, and the driving mileage when consuming all electric quantity is the driving mileage of the full charge state. When the preset electric quantity is all electric quantities, in step S130, the driving mileage difference of the electric vehicle consuming unit electric quantity includes, under the condition that the friction plate of the electric vehicle is removed and the condition that the friction plate of the electric vehicle is not removed, and under the condition that the loaded preset resistance and the preset hourly speed are the same in any state:
step S131: the method comprises the steps that under the condition that a friction plate of the electric automobile is not removed, under the working conditions of loading preset resistance and preset speed per hour, the driving mileage consuming all electric quantity is the first driving mileage.
Step S132: and testing the driving mileage of the electric automobile which consumes all electric quantity as a second driving mileage under the working conditions of loading preset resistance and preset speed per hour under the state of removing the friction plate.
Step S133: and calculating to obtain a difference value between the second driving range and the first driving range as a total mileage difference.
Step S134: the driving mileage difference when consuming unit electric quantity can be calculated and obtained through the ratio of the total mileage difference to all electric quantities.
As another embodiment, before the step S120 of applying the preset resistance and the preset speed per hour to the electric vehicle with the friction plate removed, the method further includes removing the friction plate in the electric vehicle. The friction plates comprise friction plates of front and rear wheels in the electric automobile.
After the friction plates of the front wheel and the rear wheel of the electric automobile are removed, the brake pedal needs to be treaded when the electric automobile is started and put into gear, so that the test process is carried out smoothly. Optionally, before removing the friction plates of the front and rear wheels of the electric vehicle, the method further comprises: a stopper is installed on a bracket of the brake pedal to limit a distance that the brake pedal moves downward.
When installing the locating part on the brake pedal support, having dismantled the electric automobile behind the friction disc, when trampling brake pedal, because the effect of blocking of locating part for brake pedal can not be too deeply by the degree of depth of trampling, the condition that the piston was pushed out can not appear yet. Simultaneously, have the effect of keeping out of spacing piece, the operator can directly trample when trampling the operation and need not be the degree of depth of trampling the accuse, when brake pedal trampled to with the spacing piece butt, brake pedal's the degree of depth just suitable can not appear by the too shallow condition of degree of depth of trampling to guarantee electric automobile's smooth start-up and in the same direction as the good gear shifting.
It can be understood that the preset speed per hour in the method for testing the dragging energy consumption of the electric vehicle caliper provided by the embodiment of the application can comprise a plurality of different speed per hour, and the preset speed per hour is adjusted according to the test requirement, so that the driving mileage difference of the electric vehicle when unit electric quantity is consumed respectively in a state that the friction plate is removed and a state that the friction plate is not removed can be obtained in a plurality of different speed per hour. And repeating the step S110 and the step S120 under different vehicle speed working conditions to obtain the driving mileage influenced by the dragging resistance of the calipers under different vehicle speed working conditions.
The process of the method for testing the dragging energy consumption of the electric automobile calipers provided by the embodiment of the application is as follows: firstly, acquiring hub road fitting parameters when the same road running resistance is loaded, then respectively carrying out constant-speed working condition tests on a standard vehicle under two states of a friction plate and a friction plate removal state when the standard vehicle has the friction plate and the friction plate removal state according to data in a sliding resistance curve and the hub road fitting parameters, and determining first test data corresponding to the standard vehicle (electric vehicle) under the state that the friction plate is not removed and second test data corresponding to the standard vehicle (electric vehicle) under the state that the friction plate is removed; and finally, testing and analyzing the energy consumption of the vehicle to be tested according to the obtained first test data and the second test data.
According to the method for testing the dragging energy consumption of the calipers of the electric automobile, the sliding resistance curve of the electric automobile with standard parameters when the same road running resistance is loaded is determined; and respectively determining the energy consumption value of the unit power consumption of the whole electric automobile of the standard parameter by adopting a constant speed method under the two states of not removing the friction plate and removing the friction plate, and obtaining the difference of the energy consumption values of the whole electric automobile under the two different states through calculation, namely the dragging energy consumption value of the caliper of the electric automobile. The method for testing the dragging energy consumption of the electric automobile calipers can effectively improve the performance test effect, so that the test result is more targeted, and the dragging energy consumption of the electric automobile calipers and the occupation ratio of the dragging energy consumption in the whole automobile energy consumption are conveniently separated.
The embodiment of the application further provides an electric automobile caliper dragging energy consumption testing device 100.
Referring to fig. 5, the device for testing the dragging energy consumption of the caliper of the electric vehicle may include a hub test stand, a controller 110 and a display 120.
The rotary hub test bed is used for bearing an electric automobile, and the electric automobile is placed on the rotary hub test bed for subsequent tests.
The controller 110 may perform the parameter loading step and the result testing step in the method for testing the dragging energy consumption of the caliper of the electric vehicle. The controller 110 is configured to measure a driving mileage difference of the electric vehicle when unit electric power consumed by the electric vehicle is consumed in two states of not removing the friction plate and removing the friction plate under a preset resistance and a preset speed per hour.
Specifically, referring to fig. 6, the controller 110 may include a resistance loading module 111, a speed loading module 113, a capacity control module 115, and a mileage testing module 117. The resistance loading module 111 is used for loading resistance to a preset resistance on the electric vehicle to be tested; the speed loading module 113 is used for loading the speed of the electric vehicle to be tested to a preset speed per hour; the power control module 115 is used for controlling the power consumed by the electric vehicle to be tested or the remaining power; the driving mileage testing module 117 is used for measuring and calculating the mileage of the electric vehicle to be tested; and finally, obtaining the driving mileage difference of the electric automobile to be tested when unit electric quantity is consumed under the two states of not removing the friction plate and removing the friction plate.
The display 120 is electrically connected to the controller 110, and the display 120 may display the driving mileage difference of the electric vehicle to be tested, which is finally obtained by the controller 110 and consumes a unit amount of electricity, and at least one of the consumed amount of electricity, the remaining amount of electricity, and the driving mileage of the electric vehicle to be tested, which is in two different states of not removing the friction plate and removing the friction plate, and during the testing process.
Alternatively, as shown in fig. 6, the resistance loading module 111 loads resistance to a preset resistance and outputs the resistance through the display 120, the speed loading module 113 loads speed to a preset speed and outputs the speed through the display 120, the power control module 115 controls power consumed by the electric vehicle and remaining power and outputs the power through the display 120, and the mileage test module 117 tests a mileage value of the electric vehicle and outputs the mileage value through the display 120.
According to the device for testing dragging energy consumption of the electric automobile calipers, firstly, the driving mileage of the electric automobile to be tested, which consumes the preset electric quantity, is tested under the state that the friction plate is not removed; and then testing the driving mileage of the electric automobile to be tested, which consumes the preset electric quantity, in the state of removing the friction plate.
After the friction plate is removed, the electric automobile to be tested needs to tread a brake pedal when the electric automobile is started and put into gear. When the brake pedal is deeply treaded, the piston can be pushed out under the state that the friction plate of the caliper is removed, so that the piston can interfere with the brake disc, and the smooth operation of the test process is influenced; when the depth of the stepping of the brake pedal is shallow, the starting and the gear engaging of the electric automobile may be affected, so that the starting and the gear engaging cannot be normally and smoothly carried out.
In order to prevent the brake pedal from being stepped too deeply or too shallowly when the electric automobile is electrified, the caliper is not favorable for dragging the smooth performance of the energy consumption testing process. Optionally, the device for testing the dragging energy consumption of the electric vehicle caliper further comprises a limiting member 140, as shown in fig. 7.
Brake pedal is not being trampled under the state, has certain distance of predetermineeing between brake pedal and the locating part, after brake pedal is trampled down, can guarantee that the brake light signal opens, and oil pipe's pressure ratio is less in the electric automobile simultaneously, is trampled when moving down certain distance at restriction brake pedal, can guarantee the normal clear of testing process.
Fig. 7 is a schematic structural diagram of the limiting element 140, the limiting element 140 may be a frame structure, and the limiting element 140 may include an installation portion 142 and a limiting portion 144 fixedly connected to the installation portion 142. The limiting part 144 is opposite to the mounting part 142, the mounting part 142 is used for being connected to a brake pedal bracket 150 of the electric vehicle to be detected, and the limiting part 140 is fixed through the brake pedal bracket 150. The limiting portion 144 is used for resisting the brake pedal 130 when the brake pedal 130 is stepped on during the test process, so as to limit the downward moving distance of the brake pedal 130 (see fig. 8).
Fig. 9 is a schematic structural view illustrating the limiting member 140 mounted on the brake pedal bracket 150. The brake pedal support 150 includes a base located at the bottom, mounting holes are formed in both sides of the base, the mounting portions 142 of the limiting members 140 correspond to the mounting holes in both sides of the base one by one, and the mounting portions 142 of the limiting members 140 are fixedly connected with the base by fasteners, so that the limiting members 140 and the brake pedal support 150 are fixed as a whole. A support space is formed between the stopper portion 144 and the mounting portion 142 to limit a distance that the brake pedal 130 moves downward when stepped on.
It is understood that the distance that the brake pedal 130 is allowed to move downward when stepped on can be adjusted by adjusting the size of the supporting space between the stopper portion 144 and the mounting portion 142.
It is understood that the structure of the limiting member 140 is not limited to the frame structure, and may also be a plate-like structure, a bar-like structure or a block-like structure. The shape of the limiting member 140 is not limited in the present application, and the limiting member 140 may limit the distance that the brake pedal 130 moves downward when being depressed.
The embodiment of the application provides an electric automobile calliper dragging energy consumption test method and a test device, can measure the energy consumption of electric automobile consumption when driving at a uniform speed and the energy consumption of calliper dragging consumption when driving at a uniform speed, can effectively promote the performance test effect, make the test result have pertinence more, be convenient for isolate the energy consumption test analysis result of electric automobile calliper dragging and account for the ratio in whole car energy consumption, can relatively accurately test out the influence of calliper dragging resistance to whole car continuation of the journey, be favorable to the development of products, and can effectively verify the influence of product characteristics to improving whole car continuation of the journey ability in the product development process.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. The method for testing dragging energy consumption of the calipers of the electric automobile is characterized by comprising the following steps of:
loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and testing the driving mileage of the electric automobile without the friction plate removed, which consumes the preset electric quantity;
loading the preset resistance and the preset speed per hour on the electric automobile with the friction plate removed, and testing the driving mileage of the electric automobile with the friction plate removed, which consumes the preset electric quantity; and
and solving the driving mileage difference when the electric automobile with the friction plate removed and the electric automobile without the friction plate removed consume unit electric quantity.
2. The method for testing dragging energy consumption of an electric vehicle caliper according to claim 1, wherein the step of loading a preset resistance and a preset speed per hour on the electric vehicle without removing the friction plate comprises the following steps:
driving the electric automobile without the friction plate removed to a hub rotating test bed;
loading preset resistance and preset speed per hour on the electric automobile without the friction plate removed, and driving at the preset speed per hour at a constant speed;
and testing the driving mileage of the electric automobile without the friction plate removed, wherein the driving mileage consumes the preset electric quantity under the conditions of the preset resistance and the preset speed per hour.
3. The method for testing dragging energy consumption of an electric vehicle caliper according to claim 1, wherein the step of loading the preset resistance and the preset speed per hour on the electric vehicle with the friction plate removed comprises the step of testing the driving mileage of the electric vehicle with the friction plate removed, wherein the driving mileage consumes the preset electric quantity, and the step of testing the driving mileage of the electric vehicle with the friction plate removed comprises the following steps:
driving the electric automobile with the friction plate removed to a hub rotating test bed;
loading the preset resistance and the preset speed per hour on the electric automobile with the friction plate removed, and driving at the preset speed per hour at a constant speed;
and testing the driving mileage of the electric automobile with the friction plate removed, which consumes the preset electric quantity under the conditions of the preset resistance and the preset speed per hour.
4. The method for testing dragging energy consumption of an electric vehicle caliper according to claim 1, wherein before the step of applying a preset resistance and a preset speed per hour to the electric vehicle without the friction plate removed, the method further comprises the following steps: fully charging the electric automobile without the friction plate removed;
before loading the preset resistance and the preset speed per hour on the electric automobile with the friction plate removed, the method further comprises the following steps: and fully charging the electric automobile with the friction plate removed.
5. The method for testing dragging energy consumption of the electric vehicle caliper according to claim 4, wherein the preset electric quantity comprises a full electric quantity;
the step of calculating the difference between the driving mileage of the electric automobile with the friction plate removed and the driving mileage of the electric automobile without the friction plate removed when the electric automobile consumes unit electric quantity comprises:
testing the driving mileage of the electric automobile without the friction plate removed as a first driving mileage under the conditions of the preset resistance and the preset speed per hour;
testing the driving mileage of the electric automobile with the friction plate removed as a second driving mileage under the conditions of the preset resistance and the preset speed per hour;
calculating the difference value between the second driving range and the first driving range as a total mileage difference;
and calculating the ratio of the total mileage difference to all the electric quantities to be the driving mileage difference when consuming unit electric quantity.
6. The method for testing dragging energy consumption of an electric vehicle caliper according to claim 1, wherein before the step of applying the preset resistance and the preset speed per hour to the electric vehicle with the friction plate removed, the method further comprises: and (4) detaching friction plates of front and rear wheels of the electric automobile.
7. The method for testing dragging energy consumption of the electric vehicle caliper according to claim 6, wherein before removing friction plates of front and rear wheels of the electric vehicle, the method further comprises the following steps: a limiting piece is arranged on the brake pedal support to limit the downward moving distance of the brake pedal.
8. The method for testing dragging energy consumption of an electric vehicle caliper according to claim 1, wherein the preset speed per hour comprises a plurality of different speed per hour, and the driving mileage difference between the electric vehicle with the friction plate removed and the electric vehicle without the friction plate removed when consuming unit electric quantity is calculated and obtained at the plurality of different speed per hour.
9. The utility model provides an electric automobile calliper drags energy consumption testing arrangement which characterized in that includes:
the rotary hub test bed is used for bearing an electric automobile to be tested;
the controller is used for respectively acquiring the driving mileage difference of the electric automobile to be tested in the two states of not removing the friction plate and removing the friction plate when consuming unit electric quantity by adopting the electric automobile caliper dragging energy consumption testing method of any one of claims 1 to 8 under the preset resistance and the preset speed per hour; and
and the display is electrically connected with the controller and used for displaying the driving mileage difference when the electric automobile to be tested consumes unit electric quantity and at least one of the consumed electric quantity, the residual electric quantity and the driving mileage under two states of not dismounting the friction plate and dismounting the friction plate.
10. The electric vehicle caliper dragging energy consumption testing device according to claim 9, further comprising:
the locating part, the locating part include the installation department and with installation department fixed connection's spacing portion, the installation department be used for with wait to detect electric automobile's brake pedal support fixed connection, spacing portion is used for the restriction to wait to detect electric automobile the distance of brake pedal downstream.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011024429.6A CN112179675A (en) | 2020-09-25 | 2020-09-25 | Method and device for testing dragging energy consumption of electric automobile calipers |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011024429.6A CN112179675A (en) | 2020-09-25 | 2020-09-25 | Method and device for testing dragging energy consumption of electric automobile calipers |
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| CN112179675A true CN112179675A (en) | 2021-01-05 |
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| CN202011024429.6A Pending CN112179675A (en) | 2020-09-25 | 2020-09-25 | Method and device for testing dragging energy consumption of electric automobile calipers |
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| CN113280968A (en) * | 2021-05-08 | 2021-08-20 | 安徽江淮汽车集团股份有限公司 | Vehicle friction plate dragging torque test method, distribution diagram test method and device |
| CN114705345A (en) * | 2022-04-28 | 2022-07-05 | 重庆长安汽车股份有限公司 | Method for evaluating dragging force of brake caliper |
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| CN103728133A (en) * | 2014-01-24 | 2014-04-16 | 武汉理工大学 | Method for testing automotive transmission system resistance distribution |
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Application publication date: 20210105 |