CN110949394B - Single-pedal brake testing method, device, equipment, storage medium and system - Google Patents

Single-pedal brake testing method, device, equipment, storage medium and system Download PDF

Info

Publication number
CN110949394B
CN110949394B CN201911243472.9A CN201911243472A CN110949394B CN 110949394 B CN110949394 B CN 110949394B CN 201911243472 A CN201911243472 A CN 201911243472A CN 110949394 B CN110949394 B CN 110949394B
Authority
CN
China
Prior art keywords
vehicle
information
pedal
tested
braking
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
Application number
CN201911243472.9A
Other languages
Chinese (zh)
Other versions
CN110949394A (en
Inventor
张鑫
马腾
赵永强
李嘉石
霍海涛
祝浩
尚蕴志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Group Corp
Original Assignee
FAW Group Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by FAW Group Corp filed Critical FAW Group Corp
Priority to CN201911243472.9A priority Critical patent/CN110949394B/en
Publication of CN110949394A publication Critical patent/CN110949394A/en
Application granted granted Critical
Publication of CN110949394B publication Critical patent/CN110949394B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
    • B60W40/105—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
    • B60W40/107—Longitudinal acceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0604—Throttle position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B60W2520/105—Longitudinal acceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/18—Braking system

Abstract

The embodiment of the invention discloses a single-pedal brake testing method, a single-pedal brake testing device, single-pedal brake testing equipment, single-pedal brake testing storage media and a single-pedal brake testing system. The method comprises the following steps: acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery; and determining the single-pedal braking information of the vehicle to be tested according to the running information. By adopting the technical scheme, the embodiment of the invention can avoid the influence of the subjective consciousness of the driver on the single-pedal braking information obtained by testing by objectively quantizing the single-pedal braking information of the vehicle to be tested, and improve the accuracy of the result of determining the large-pedal braking information.

Description

Single-pedal brake testing method, device, equipment, storage medium and system
Technical Field
The invention relates to the technical field of automobiles, in particular to a single-pedal brake testing method, a single-pedal brake testing device, single-pedal brake testing equipment, a single-pedal brake testing storage medium and a single-pedal brake testing system.
Background
With the development of automobile technology, the whole automobile driving mode in the pure electric automobile is more and more, wherein the single-pedal driving mode is a brand new driving mode in the pure electric automobile.
Before being put into the market, the performance of the pure electric automobile in a single-pedal driving mode needs to be tested. In the prior art, the performance of the pure electric vehicle in the single-pedal driving mode is tested mainly through subjective evaluation of a professional driver, namely, the professional driver drives the pure electric vehicle in the single-pedal driving mode and gives subjective judgment.
However, the performance test result of the pure electric vehicle in the prior art is greatly influenced by the subjective consciousness of the driver, and the test result has a large error.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, a device, a storage medium, and a system for testing a single-pedal brake, so as to improve accuracy of a test result of a pure electric vehicle in a single-pedal driving mode.
In a first aspect, an embodiment of the present invention provides a single-pedal braking test method, including:
acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery;
and determining the single-pedal braking information of the vehicle to be tested according to the running information.
In a second aspect, an embodiment of the present invention provides a single-pedal braking testing apparatus, including:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, and the running information comprises at least one item of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery;
and the determining module is used for determining the single-pedal braking information of the vehicle to be tested according to the running information.
In a third aspect, an embodiment of the present invention provides a computer device, including:
one or more processors;
a memory for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a single pedal braking test method as described in embodiments of the invention.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement a single-pedal braking test method according to an embodiment of the present invention.
In a fifth aspect, an embodiment of the present invention further provides a single-pedal braking test system, which includes a speed sensor, an acceleration sensor, a vehicle controller, a battery controller, a data acquisition device, and a computer device, wherein,
the speed sensor is connected with the data acquisition equipment and used for acquiring speed information of a vehicle to be tested and sending the speed information to the data acquisition equipment;
the acceleration sensor is connected with the data acquisition equipment and used for acquiring acceleration information of the vehicle to be tested and sending the acceleration information to the data acquisition equipment;
the vehicle control unit is connected with the data acquisition equipment and used for acquiring the opening information of an accelerator pedal of the vehicle to be tested and sending the opening information of the accelerator pedal to the data acquisition equipment;
the battery controller is connected with the data acquisition equipment and is used for acquiring the residual electric quantity information of the power battery of the vehicle to be tested and sending the residual electric quantity information to the data acquisition equipment;
the data acquisition equipment is connected with the computer equipment and is used for forwarding the received speed information, the received acceleration information, the received accelerator pedal opening information and the received residual electric quantity information to the computer equipment;
and the computer equipment is used for determining the single-pedal braking information of the vehicle to be tested according to the speed information, the acceleration information, the accelerator pedal opening information and the residual electric quantity information sent by the acquisition equipment.
In the single-pedal brake testing method, the single-pedal brake testing device, the single-pedal brake testing equipment, the single-pedal brake testing storage medium and the single-pedal brake testing system, when a vehicle to be tested runs under a set working condition, running information of the vehicle to be tested is obtained, wherein the running information comprises at least one of speed information, acceleration information, accelerator pedal opening information and residual electric quantity information of a power battery; and determining the single-pedal braking information of the vehicle to be tested according to the acquired running information. By adopting the technical scheme, the embodiment of the invention can avoid the influence of the subjective consciousness of the driver on the single-pedal braking information obtained by testing by objectively quantizing the single-pedal braking information of the vehicle to be tested, and improve the accuracy of the result of determining the large-pedal braking information.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic flow chart of a single-pedal braking test method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a single-pedal braking test method according to a second embodiment of the present invention;
fig. 3 is a block diagram of a single-pedal braking testing apparatus according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a single-pedal braking test system according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings. In addition, the embodiments and features of the embodiments of the present invention may be combined with each other without conflict
Example one
The embodiment of the invention provides a single-pedal brake testing method. The method can be executed by a single-pedal braking testing device, wherein the device can be realized by software and/or hardware, can be generally integrated in an upper computer, and is suitable for testing the single-pedal braking information of the pure electric vehicle in a single-pedal mode.
Fig. 1 is a schematic flow chart of a single-pedal braking test method according to an embodiment of the present invention, as shown in fig. 1, the method includes:
s110, acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery.
The speed information of the vehicle to be tested can be longitudinal speed information of the vehicle to be tested, and can be acquired through a speed sensor fixedly arranged on a vehicle body of the vehicle to be tested; the acceleration information of the vehicle to be tested can be longitudinal acceleration information of the vehicle to be tested, and can be acquired through an acceleration sensor fixedly arranged on a vehicle body of the vehicle to be tested (such as arranged on a slide rail of a driver seat); the accelerator pedal opening information of the vehicle to be tested can be acquired from a vehicle controller of the vehicle to be tested; the remaining capacity information of the power battery of the vehicle to be tested can be obtained from the battery controller of the vehicle to be tested.
In this embodiment, different working conditions for measuring different single-pedal brake information of the vehicle to be tested can be preset, the vehicle to be tested is driven according to the conditions limited by the working conditions, the running information of the vehicle to be tested under the corresponding working conditions is collected, and therefore different single-pedal brake information of the vehicle to be tested is determined according to the running information of the vehicle to be tested collected under different working conditions. Wherein, each working condition can be set according to the single pedal braking information to be tested.
In this embodiment, it is assumed that the single-pedal maximum braking acceleration and/or the single-pedal maximum braking acceleration response time of the vehicle to be tested is tested under a first working condition, the single-pedal maximum residual braking capacity of the vehicle to be tested is tested under a second working condition, and the single-pedal maximum braking parking gradient and/or the single-pedal maximum gradient parking and vehicle sliding distance of the vehicle to be tested is tested under a third working condition, for example, the first working condition may be set as that the driving road surface is a horizontal road surface, the residual capacity of the power battery is within the range of the single-pedal normal braking capacity, and the driving mode is to release the pedal when the vehicle to be tested is accelerated to a first preset speed; setting the second working condition as that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the range of the normal braking electric quantity of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed; and setting the third working condition as that the running road surface comprises a plurality of road surfaces with different gradients, the residual electric quantity of the power battery is within the normal braking electric quantity range of the single pedal, and the running mode is that the pedal is released when the running mode is accelerated to a third preset speed on each road surface.
In the above exemplary description, when testing the maximum braking acceleration of the single pedal of the vehicle to be tested and/or the maximum braking acceleration response time of the single pedal, on the premise of ensuring that the remaining capacity of the power battery of the vehicle to be tested can achieve the single pedal braking of the vehicle to be tested (the remaining capacity of the power battery is within the normal braking capacity range of the single pedal), the accelerator pedal of the vehicle to be tested is released after the vehicle to be tested is driven on a horizontal road surface and accelerated from a standstill to a first preset speed or is driven at a constant speed for a period of time according to the first preset speed until the vehicle to be tested stops, and the driving information of the vehicle to be tested is periodically collected in the above process, so that the driving information of the vehicle to be tested in a testing process under a first working condition can be obtained.
When the highest residual electric quantity of the single-pedal brake of the vehicle to be tested is tested, when the power battery has a higher residual electric quantity which is out of the normal brake electric quantity range of the single-pedal, the vehicle to be tested is driven on a horizontal road surface to accelerate from a static state to a second preset speed or drive at a constant speed for a period of time according to the second preset speed, then the accelerator pedal of the vehicle to be tested is released until the vehicle to be tested stops, after the vehicle to be tested stops, the vehicle to be tested is accelerated to the second preset speed again or the vehicle to be tested is driven at a constant speed for a period of time according to the second preset speed, then the accelerator pedal of the vehicle to be tested is released until the vehicle to be tested stops, the processes of starting, accelerating, decelerating and stopping are repeatedly executed until the highest residual electric quantity of the power battery reaches the target residual electric quantity which is within the normal brake electric quantity, and obtaining the running information of the vehicle to be tested in a test process under the second working condition.
When the single-pedal maximum braking parking slope and/or the single-pedal maximum slope parking sliding distance of the vehicle to be tested are tested, the vehicle to be tested is driven in the upward and downward directions respectively in sequence from small to large according to the slope on the road surface with different slopes, the vehicle to be tested is accelerated to a third preset speed from rest or is driven at a constant speed for a period of time according to the third preset speed, the acceleration pedal of the vehicle to be tested is released until the vehicle to be tested cannot stop at a certain slope, and the running information of the vehicle to be tested is periodically collected in the process so as to obtain the collection of the running information in the testing process under the third working condition.
And S120, determining the single-pedal braking information of the vehicle to be tested according to the running information.
The single-pedal braking information (i.e., the single-pedal braking test result) of the vehicle to be tested may be understood as information related to the braking performance of the single-pedal mode, which requires the vehicle to be tested in the single-pedal mode, and may include at least one of a single-pedal maximum braking acceleration, a single-pedal maximum braking acceleration response time, a single-pedal braking maximum remaining power, a single-pedal maximum braking parking slope, and a single-pedal maximum slope parking coast distance of the vehicle to be tested.
In the embodiment, the single-pedal maximum braking acceleration and the maximum braking acceleration response time of the vehicle to be tested can be determined according to the acceleration information and the accelerator pedal opening information when the vehicle to be tested runs under the first working condition; the highest residual capacity of the single-pedal brake of the vehicle to be tested can be determined according to the acceleration information and the residual capacity information of the vehicle to be tested when the vehicle runs under the second working condition; the single-pedal maximum braking parking gradient and the single-pedal maximum gradient parking and sliding distance of the vehicle to be tested can be determined according to the speed information of the vehicle to be tested under the third working condition or determined according to the speed information and the acceleration information of the vehicle to be tested under the third working condition.
Taking the example of determining the maximum braking parking slope of the single pedal of the vehicle to be detected according to the speed information and the acceleration information of the vehicle to be detected under the third working condition, when determining the maximum braking parking slope when the vehicle to be detected is on an uphill slope, if the vehicle to be detected has the conditions that the speed is less than zero (the direction from a vehicle parking space to a vehicle head is determined as a positive direction) and the acceleration is less than or equal to zero in the process of braking the vehicle to be detected with the maximum braking acceleration on a road surface with a certain slope (namely the opening information of an acceleration pedal is zero), determining that the vehicle to be detected cannot be parked under the current slope, otherwise, determining that the vehicle to be detected can be parked under the current slope; when the maximum braking parking gradient of the vehicle to be tested when the vehicle to be tested is downhill is determined, if the vehicle to be tested has the conditions that the speed is greater than zero and the acceleration is greater than or equal to zero in the process of braking the vehicle to be tested on a road surface with a certain gradient at the maximum braking acceleration, the vehicle to be tested cannot be parked under the current gradient, and if the vehicle to be tested cannot be parked under the current gradient, the vehicle to be tested can be determined to be parked under the current gradient.
According to the single-pedal brake testing method provided by the embodiment of the invention, when a vehicle to be tested runs under a set working condition, running information of the vehicle to be tested is obtained, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery; and determining the single-pedal braking information of the vehicle to be tested according to the acquired running information. By adopting the technical scheme, the single-pedal braking information of the vehicle to be tested is objectively quantized, the influence of the subjective consciousness of the driver on the single-pedal braking information obtained through testing can be avoided, and the accuracy of the large-pedal braking information determination result is improved.
On the basis of the above embodiment, after determining the single-pedal braking information of the vehicle to be tested according to the driving information, the optimization may further include: and generating a driving performance evaluation result of the vehicle to be tested in a single-pedal state according to the single-pedal braking information, and displaying the driving performance evaluation result to a tester. In this embodiment, after the single-pedal braking information of the vehicle to be tested is obtained, the single-pedal braking information of the vehicle to be tested can be further evaluated to generate an evaluation result, and the generated evaluation result is displayed to a developer, so that the developer can visually determine the degree of superiority and inferiority of the single-pedal braking performance of the vehicle to be tested. In the above optimization, the evaluation results may be presented in a percentage value manner. For example, when determining the evaluation result, the score of each item of single-pedal braking information of the vehicle to be tested may be determined according to a preset evaluation standard table (as shown in table 1), and the average value of the scores may be determined as the drivability evaluation result of the vehicle to be tested in the single-pedal state. If a corresponding value does not exist in the evaluation standard table for a certain item of single-pedal braking information, the score of the item of single-pedal braking information can be determined in an interpolation mode.
TABLE 1 evaluation criteria Table
Figure BDA0002306884450000081
Example two
Fig. 2 is a schematic flow chart of a single-pedal braking test method provided in the second embodiment of the present invention, and in this embodiment, based on the above embodiment, "determining braking information of the vehicle to be tested in a single-pedal state according to the driving information" is optimized as follows: if the set working condition is a first working condition, determining a time period when the opening of the accelerator pedal is zero as a braking time period according to the opening information of the accelerator pedal, wherein the first working condition is a working condition that a running road surface is a horizontal road surface, the residual electric quantity of the power battery is within a normal braking electric quantity range of a single pedal, and the pedal is released when the running mode is accelerated to a first preset speed; and determining the maximum braking acceleration of the vehicle to be tested in the braking time period according to the acceleration information, and taking the maximum braking acceleration as the single-pedal maximum braking acceleration of the vehicle to be tested.
Further, the single-pedal braking test method further comprises the following steps: and determining the single-pedal maximum braking acceleration response time of the vehicle to be tested according to the starting time of the braking time period and the time when the acceleration of the vehicle to be tested reaches the maximum braking acceleration.
Further, the determining the single-pedal braking information of the vehicle to be tested according to the running information comprises the following steps: if the set working condition is a second working condition, determining a target maximum braking acceleration which can be reached by the vehicle to be tested when the residual electric quantity is reduced to a target residual electric quantity according to the acceleration information and the residual electric quantity information, wherein the target residual electric quantity is within a normal braking electric quantity range of a single pedal; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the normal braking electric quantity range of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed; multiplying the target maximum braking acceleration by a preset proportional coefficient to obtain the target braking acceleration of the vehicle to be tested; and determining the target residual capacity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual capacity information, and taking the target residual capacity as the single-pedal braking highest residual capacity of the vehicle to be tested.
Further, the determining the braking information of the vehicle to be tested in the single-pedal state according to the running information comprises: if the set working condition is a third working condition, determining whether the vehicle to be tested can normally stop when running on each road surface according to the speed information so as to obtain the maximum braking parking gradient of the single pedal of the vehicle to be tested, wherein the third working condition is that the running road surface comprises a plurality of road surfaces with different gradients, the residual electric quantity of the power battery is within the normal braking electric quantity range of the single pedal, and the running mode is that the pedal is released when the vehicle is accelerated to a third preset speed on each road surface respectively; and determining the vehicle sliding distance of the vehicle to be tested when the vehicle to be tested is braked at the maximum braking acceleration on the road surface with the gradient of the single-pedal maximum braking parking gradient, and taking the vehicle sliding distance as the single-pedal maximum gradient parking distance of the vehicle to be tested.
Correspondingly, as shown in fig. 2, the single-pedal braking test method provided by the embodiment includes:
s210, acquiring running information of the vehicle to be tested when the vehicle runs under the set working condition, wherein the running information comprises speed information, acceleration information, accelerator pedal opening information and residual capacity information of the power battery, and executing S220, S250 or S280.
And S220, if the set working condition is a first working condition, determining a time period when the opening of the accelerator pedal is zero as a braking time period according to the opening information of the accelerator pedal, wherein the first working condition is a working condition that a running road surface is a horizontal road surface, the residual electric quantity of the power battery is within a normal braking electric quantity range of a single pedal, and the running mode is a pedal release working condition when the vehicle is accelerated to a first preset speed.
The normal braking electric quantity range of the single pedal can be understood as the electric quantity range of the power battery when the single pedal function of the vehicle to be tested can be normally used; the first preset speed can be set according to requirements, such as 30km/h, 40km/h or 50km/h and other speed values; whether the set working condition is the first working condition or not can be determined according to input operation of developers, and can also be obtained according to the running information of the vehicle to be tested.
For example, when the braking time period is determined, whether the accelerator opening information of the vehicle to be detected at each moment is zero or not can be sequentially judged according to the time sequence, and if the accelerator opening information at a certain moment is judged to be zero and the accelerator opening information at the previous moment is not zero, the moment is determined as the starting moment of the braking time period of the vehicle to be detected; and if the accelerator opening information at a certain moment is judged and determined to be zero, the accelerator opening information at the next moment is not zero, and the accelerator opening information of the vehicle to be tested between the moment and the starting moment is zero, determining the moment as the ending moment of the braking time period, and further determining the time period taking the starting moment as the starting moment and the ending moment as one braking time period of the vehicle to be tested.
And S230, determining the maximum braking acceleration of the vehicle to be tested in the braking time period according to the acceleration information, and taking the maximum braking acceleration as the single-pedal maximum braking acceleration of the vehicle to be tested.
In this step, the single-pedal maximum braking acceleration of the vehicle to be tested may be determined according to the maximum braking acceleration in one or more braking time periods, for example, the maximum braking acceleration of the vehicle to be tested in a certain braking time period may be determined according to the acceleration information of the vehicle to be tested, and the maximum braking acceleration may be determined as the single-pedal maximum braking acceleration of the vehicle to be tested; the maximum braking acceleration in each braking time period may also be obtained respectively, and the maximum braking acceleration with the largest absolute value among the maximum braking accelerations is determined as the single-pedal maximum braking acceleration of the vehicle to be tested, or an average value of the maximum braking accelerations is calculated and determined as the single-pedal maximum braking acceleration of the vehicle to be tested, which is not limited in this embodiment. In order to further increase the accuracy of the determined maximum brake acceleration for a single pedal, it may be preferred that the maximum brake acceleration for the vehicle to be tested is determined from the maximum brake acceleration over a plurality of braking time periods. The braking acceleration is the acceleration opposite to the speed direction of the vehicle to be tested, namely the acceleration which hinders the vehicle to be tested to run along the current direction, and correspondingly, the maximum braking acceleration is the braking acceleration with the maximum absolute value; the single-pedal maximum brake acceleration can be understood as the maximum brake acceleration that can be achieved when the vehicle to be tested is braked in the single-pedal driving mode.
S240, determining the single-pedal maximum braking acceleration response time of the vehicle to be tested according to the starting time of the braking time period and the time when the acceleration of the vehicle to be tested reaches the maximum braking acceleration, and ending the test process.
Wherein the maximum brake acceleration response time may be understood as the length of time from the release of the brake pedal by the user to the maximum brake acceleration of the vehicle to be tested.
Specifically, the single-pedal maximum braking acceleration response time of the vehicle to be tested can be determined according to the time reaching the maximum braking acceleration in one or more braking time periods, for example, the time length of the interval between the time reaching the maximum braking acceleration in the braking time period and the starting time of the braking time period of the vehicle to be tested in a certain braking time period can be calculated, and the time length is determined as the single-pedal maximum braking acceleration response time of the vehicle to be tested; the time length of the interval between the time when the vehicle to be tested reaches the maximum braking acceleration in the plurality of braking time periods and the starting time of the braking time period can also be respectively calculated, and the maximum value, the minimum value, the median value or the average value and the like in the plurality of time lengths are determined as the single-pedal maximum braking acceleration response time of the vehicle to be tested. The present embodiment may preferably determine the single-pedal maximum braking acceleration response time of the vehicle to be tested according to the time to reach the maximum braking acceleration in the plurality of braking time periods, so as to further improve the accuracy of the determined single-pedal maximum braking acceleration response time.
S250, if the set working condition is a second working condition, determining a target maximum braking acceleration which can be reached by the vehicle to be tested when the residual electric quantity is reduced to a target residual electric quantity according to the acceleration information and the residual electric quantity information, wherein the target residual electric quantity is within a single-pedal normal braking electric quantity range; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is positioned outside the normal braking electric quantity range of the single pedal, and the driving mode is the working condition that the pedal is released when the vehicle to be tested is accelerated to the second preset speed.
Specifically, a first target moment when the power battery of the vehicle to be tested is reduced to the target residual capacity can be determined according to the residual capacity information of the vehicle to be tested, and an acceleration value of the vehicle to be tested, which is obtained by the vehicle to be tested at the first target moment, is searched from the acceleration information of the vehicle to be tested and is used as the target braking maximum acceleration.
Whether the set working condition is the second working condition or not can be determined according to input operation of developers, and can also be determined according to running information of the vehicle to be tested; the second preset speed, the initial residual capacity and the target residual capacity of the power battery can be set according to requirements, for example, the second preset speed can be set to be a speed value of 120km/h or 110km/h and the like; the initial residual capacity of the power battery can be set to 100%, 99%, 98% or the like, preferably to 100%, so as to ensure that the acquired running information contains the target residual capacity of the power battery when the maximum braking acceleration is the target braking acceleration; the target residual capacity can be set to 85%, 80% or 75%, and the like, and only the target residual capacity is required to be within the normal braking capacity range of the single pedal, preferably 80%, so that on the premise that the target maximum braking acceleration of the vehicle to be tested can represent the maximum braking acceleration of the single pedal of the vehicle to be tested when the test is stopped, the time required for the initial residual capacity of the power battery to be reduced to the target residual capacity is shortened, and the time consumed in the single pedal braking test process is further shortened.
And S260, multiplying the target maximum braking acceleration by a preset proportional coefficient to obtain the target braking acceleration of the vehicle to be tested.
In this step, the preset proportionality coefficient may be set as required, such as 45%, 50% or 55%, and preferably may be set to 50%, at which time, the target braking acceleration a of the vehicle to be tested is correspondingly set0＝amaxX 50%, wherein, amaxRepresenting the target maximum braking acceleration.
S270, determining the target residual capacity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual capacity information, and taking the target residual capacity as the single-pedal braking maximum residual capacity of the vehicle to be tested, wherein the test process is finished.
The maximum residual capacity of the single-pedal brake can be understood as the maximum residual capacity of the power battery when the ratio of the maximum braking acceleration which can be achieved by the vehicle to be tested in the single-pedal driving mode to the maximum braking acceleration of the single pedal is a preset proportionality coefficient.
The maximum residual capacity of the single-pedal brake of the vehicle to be tested can be determined according to the target residual capacity of the vehicle to be tested in a testing process, if the maximum brake acceleration of the vehicle to be tested is determined according to the acceleration information of the vehicle to be tested, the second target moment when the maximum brake acceleration is the target brake acceleration can be determined, the target residual capacity of the vehicle to be tested obtained at the second target moment by the vehicle to be tested is searched in the residual capacity information of the vehicle to be tested, and the target residual capacity is used as the maximum residual capacity of the single-pedal brake of the vehicle to be tested.
In order to further improve the accuracy of the determined maximum residual capacity of single-pedal braking, preferably, in this embodiment, the maximum residual capacity of single-pedal braking of the vehicle to be tested may be determined according to the target residual capacity of the vehicle to be tested in a plurality of testing processes, for example, the target residual capacities of the vehicle to be tested in each testing process may be respectively calculated, and the maximum value, the minimum value, the median value, or the average value of the target residual capacities may be determined as the maximum residual capacity of single-pedal braking of the vehicle to be tested.
And S280, if the set working condition is a third working condition, determining whether the vehicle to be tested can normally stop when running on the road surfaces with different gradients according to the speed information so as to obtain the maximum single-pedal braking parking gradient of the vehicle to be tested, wherein the third working condition is a working condition that the running road surface comprises a plurality of road surfaces with different gradients, the residual electric quantity of the power battery is within the normal single-pedal braking electric quantity range, and the running mode is the working condition that the pedal is released when the vehicle is accelerated to a third preset speed on each road surface respectively.
In the step, whether the set working condition is the third working condition or not can be determined according to the input operation of a developer, and can also be obtained according to the running information of the vehicle to be tested; the single-pedal maximum braking parking slope is the maximum slope at which a vehicle to be tested can park in the single-pedal driving mode, and may include a maximum uphill parking slope and a maximum downhill parking slope; the gradient of each road surface and the third preset speed in the third working condition can be set according to requirements, such as setting the gradient of the road surface to be 5%, 8%, 12%, 20% and 29%, respectively, and/or setting the third preset speed to be a speed value of 15km/h, 20km/h or 25 km/h and the like. The gradient is the ratio of the distance of the vehicle moving in the vertical direction to the distance of the vehicle moving in the horizontal direction when the vehicle runs on the road surface.
For example, the vehicle to be tested can be controlled to release the pedals when running to a third preset speed on each road surface according to the sequence of the gradient from small to large, whether the vehicle to be tested can stop is judged, and the maximum gradient of the vehicle to be tested which can stop is determined as the single-pedal maximum braking parking gradient of the vehicle to be tested. Specifically, for an uphill slope, if a vehicle to be tested can stop on the current road surface but cannot stop on the next road surface, the maximum uphill slope stopping gradient of the vehicle to be tested can be determined as the gradient of the current road surface; for a downhill, if a vehicle to be tested can stop on the current road surface but cannot stop on the next road surface, the maximum downhill parking slope of the vehicle to be tested may be determined as the slope of the current road surface.
The method for judging whether the vehicle to be tested can be parked or not can be set as required, if the vehicle sliding distance of the vehicle to be tested exceeds a preset vehicle sliding distance threshold value (such as 30m) when the vehicle is on an uphill slope, the vehicle to be tested can be judged not to be parked, and if not, the vehicle to be tested can be judged to be parked; when the vehicle to be tested descends to a preset speed threshold (such as 5km/h) in a downhill, if the vehicle speed is not reduced to zero when the moving distance of the vehicle to be tested reaches a preset distance threshold (such as 20m), the vehicle to be tested can be judged to be incapable of parking, and if the vehicle to be tested can not stop, the vehicle can be judged to be capable of parking.
And S290, determining the vehicle sliding distance of the vehicle to be tested when the vehicle to be tested is braked at the maximum braking acceleration on the road surface with the gradient of the single-pedal maximum braking parking gradient, and taking the vehicle sliding distance as the single-pedal maximum gradient parking vehicle sliding distance of the vehicle to be tested.
In this step, the rolling is a phenomenon that the vehicle moves backwards when the vehicle moves up a slope, and correspondingly, the rolling distance when the vehicle to be tested is braked at the maximum braking acceleration on a road surface with the slope of the single-pedal maximum braking parking slope, that is, the single-pedal maximum slope parking rolling distance, can be understood as the distance that the vehicle to be tested moves backwards after being braked at the maximum braking acceleration (that is, the vehicle to be tested has the speed in the direction from the vehicle head to the vehicle space, that is, the speed in the negative direction) when the vehicle to be tested travels upwards on the road surface with the slope of the single-pedal maximum braking parking slope, and the distance value can be obtained by calculating the speed value of the vehicle to be tested in each detection period and the length of the detection period in the rolling time period.
According to the single-pedal brake testing method provided by the embodiment of the invention, the single-pedal maximum brake acceleration response time, the single-pedal brake maximum remaining capacity, the single-pedal maximum brake parking slope and the single-pedal maximum slope parking vehicle sliding distance of the vehicle to be tested are obtained through testing under different working conditions, and the comprehensiveness of the determined single-pedal brake information can be improved, so that the omnibearing objective testing of the vehicle to be tested is realized, and the accuracy and the practicability of the testing result of the vehicle to be tested are further improved.
EXAMPLE III
The third embodiment of the invention provides a single-pedal brake testing device. The device can be realized by software and/or hardware, can be generally integrated in an upper computer, is suitable for testing the single-pedal braking information of the pure electric vehicle in a single-pedal mode, and obtains the single-pedal braking information of the electric vehicle by executing a single-pedal braking test method. Fig. 3 is a block diagram of a single-pedal braking test device according to a third embodiment of the present invention, as shown in fig. 3, the device includes an obtaining module 301 and a determining module 302, wherein,
the acquiring module 301 is configured to acquire driving information of a vehicle to be tested during driving under a set working condition, where the driving information includes at least one of speed information, acceleration information, accelerator pedal opening information, and remaining power information of a power battery;
a determining module 302, configured to determine single-pedal braking information of the vehicle to be tested according to the driving information.
According to the single-pedal brake testing device provided by the third embodiment of the invention, the running information of the vehicle to be tested is obtained through the obtaining module when the vehicle to be tested runs under the set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery; and determining the single-pedal braking information of the vehicle to be tested according to the acquired running information through the ground determining module. By adopting the technical scheme, the single-pedal braking information of the vehicle to be tested is objectively quantized, the influence of subjective consciousness of a driver on the single-pedal braking information obtained through testing can be avoided, and the accuracy of the result of determining the large-pedal braking information is improved.
In the above scheme, the determining module 302 may include: the time period determining unit is used for determining a time period when the opening degree of the accelerator pedal is zero as a braking time period according to the opening degree information of the accelerator pedal when the set working condition is a first working condition, wherein the first working condition is a working condition that a running road surface is a horizontal road surface, the residual electric quantity of the power battery is within a normal braking electric quantity range of a single pedal, and the running mode is a pedal release working condition when the running mode is accelerated to a first preset speed; and the first acceleration determining unit is used for determining the maximum braking acceleration of the vehicle to be tested in the braking time period according to the acceleration information, and the maximum braking acceleration is used as the single-pedal maximum braking acceleration of the vehicle to be tested.
In the foregoing scheme, the determining module 302 may further include: and the response time determining unit is used for determining the single-pedal maximum braking acceleration response time of the vehicle to be tested according to the starting time of the braking time period and the time when the acceleration of the vehicle to be tested reaches the maximum braking acceleration.
In the above scheme, the determining module 302 may include: the second acceleration determining unit is used for determining a target maximum braking acceleration which can be reached by the vehicle to be tested when the residual electric quantity is reduced to a target residual electric quantity according to the acceleration information and the residual electric quantity information when the set working condition is a second working condition, wherein the target residual electric quantity is within a range of normal braking electric quantity of a single pedal; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the normal braking electric quantity range of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed; the third acceleration determining unit is used for multiplying the target maximum braking acceleration by a preset proportional coefficient to obtain the target braking acceleration of the vehicle to be tested; and the electric quantity determining unit is used for determining the target residual electric quantity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual electric quantity information, and the target residual electric quantity is used as the single-pedal braking highest residual electric quantity of the vehicle to be tested.
In the above scheme, the determining module 302 may include: the gradient determining unit is used for determining whether the vehicle to be tested can normally stop when running on each road according to the speed information when the set working condition is a third working condition so as to obtain the maximum single-pedal braking parking gradient of the vehicle to be tested, wherein the third working condition is that the running road comprises a plurality of roads with different gradients, the residual electric quantity of the power battery is within the normal single-pedal braking electric quantity range, and the running mode is the working condition that the pedal is released when the vehicle is accelerated to a third preset speed on each road; and the distance determining unit is used for determining the vehicle sliding distance of the vehicle to be tested when the vehicle to be tested is braked at the maximum braking acceleration on the road surface with the gradient of the single-pedal maximum braking parking gradient, and the vehicle sliding distance is used as the single-pedal maximum gradient parking vehicle sliding distance of the vehicle to be tested.
Further, the single pedal braking test device may further include: and the evaluation module is used for generating a drivability evaluation result of the vehicle to be tested in a single-pedal state according to the single-pedal braking information after the single-pedal braking information of the vehicle to be tested is determined according to the driving information, and displaying the drivability evaluation result to a tester.
The single-pedal brake testing device provided by the third embodiment of the invention can execute the single-pedal brake testing method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the single-pedal brake testing method. For technical details that are not described in detail in this embodiment, reference may be made to a single pedal braking test method provided in any embodiment of the present invention.
Example four
Fig. 4 is a schematic structural diagram of a computer device according to a fourth embodiment of the present invention, as shown in fig. 4, the computer device includes a processor 40 and a memory 41, and may further include an input device 42 and an output device 43; the number of processors 40 in the computer device may be one or more, and one processor 40 is taken as an example in fig. 4; the processor 40, the memory 41, the input device 42 and the output device 43 in the computer apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 4.
The memory 41, as a computer-readable storage medium, may be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the single pedal braking test method in the embodiment of the present invention (for example, the obtaining module 301 and the determining module 302 in the single pedal braking test device). The processor 40 executes various functional applications of the computer device and data processing by executing software programs, instructions and modules stored in the memory 41, namely, implements the above-mentioned single pedal brake test method.
The memory 41 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 41 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 41 may further include memory located remotely from processor 40, which may be connected to a computer device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 42 is operable to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the computer apparatus. The output device 43 may include a display device such as a display screen.
A fourth embodiment of the present invention further provides a storage medium containing computer-executable instructions which, when executed by a computer processor, perform a method for single pedal braking testing, the method comprising:
acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery;
and determining the single-pedal braking information of the vehicle to be tested according to the running information.
Of course, the embodiment of the present invention provides a storage medium containing computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and can also perform related operations in the single pedal braking test method provided in any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the single-pedal braking test device, the included units and modules are only divided according to the functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
EXAMPLE five
The fifth embodiment of the invention provides a single-pedal brake testing system. The test system can be suitable for testing the single-pedal braking information of the pure electric vehicle in the single-pedal mode. Fig. 5 is a schematic structural diagram of a single-pedal braking test system according to a fifth embodiment of the present invention, and as shown in fig. 5, the system includes a speed sensor 1, an acceleration sensor 2, a vehicle control unit 3, a battery controller 4, a data acquisition device 5, and a computer device 6, wherein,
the speed sensor 1 is connected with the data acquisition equipment 5 and is used for acquiring speed information of a vehicle to be tested and sending the speed information to the data acquisition equipment 5;
the acceleration sensor 2 is connected with the data acquisition equipment 5 and is used for acquiring acceleration information of the vehicle to be tested and sending the acceleration information to the data acquisition equipment 5;
the vehicle control unit 3 is connected with the data acquisition device 5, and is configured to acquire accelerator pedal opening information of the vehicle to be tested, and send the accelerator pedal opening information to the data acquisition device 5;
the battery controller 4 is connected with the data acquisition device 5 and is used for acquiring the residual electric quantity information of the power battery of the vehicle to be tested and sending the residual electric quantity information to the data acquisition device 5;
the data acquisition device 5 is connected with the computer device 6 and is used for forwarding the received speed information, the received acceleration information, the received accelerator pedal opening information and the received residual electric quantity information to the computer device 6;
and the computer device 6 is used for determining the single-pedal braking information of the vehicle to be tested according to the speed information, the acceleration information, the accelerator pedal opening information and the residual electric quantity information sent by the acquisition device.
The speed sensor 1 can be a longitudinal speed sensor and can be fixedly arranged on a vehicle body of a vehicle to be tested; the acceleration sensor 2 can be a longitudinal acceleration sensor 2 which can be fixedly arranged on a slide rail of a driver seat; the data acquisition device 5 may establish a communication connection with the vehicle Controller 3 and the battery Controller 4 through a Controller Area Network (CAN bus); after receiving the speed information, the acceleration information, the accelerator pedal opening degree information and the remaining power information of the vehicle to be tested, which are sent by the data acquisition device 5, the computer device 6 can also display the received information through visual software so as to be convenient for a tester to check.
Illustratively, in the test process, the speed sensor 1 periodically collects the speed information of the vehicle to be tested and sends the speed information to the data acquisition device 5; the acceleration sensor 2 periodically collects acceleration information of the vehicle to be tested and sends the acceleration information to the data acquisition equipment 5; the vehicle control unit 3 periodically acquires the opening degree information of an accelerator pedal of a vehicle to be tested and sends the opening degree information to the data acquisition equipment 5; the battery controller 4 periodically acquires the residual electric quantity information of the power battery configured on the vehicle to be tested and sends the residual electric quantity information to the data acquisition equipment 5; the data acquisition equipment 5 receives speed information sent by the speed sensor 1, acceleration information sent by the acceleration sensor 2, accelerator pedal opening information sent by the vehicle control unit 3 and residual electric quantity information sent by the battery controller 4, and forwards the information to the computer equipment 6; the computer device 6 receives the speed information, the acceleration information, the accelerator pedal opening information and the residual electric quantity information forwarded by the data acquisition device 5, and determines the single-pedal braking information of the vehicle to be tested according to the speed information, the acceleration information, the accelerator pedal opening information and the residual electric quantity information.
The single-pedal brake testing system provided by the fifth embodiment of the invention can objectively quantify the single-pedal brake information of the vehicle to be tested, can avoid the influence of the subjective consciousness of the driver on the single-pedal brake information obtained by testing, and can improve the accuracy of the result of determining the large-pedal brake information.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A single pedal brake test method, comprising:
acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery;
determining single-pedal braking information of the vehicle to be tested according to the running information;
the determining of the single-pedal braking information of the vehicle to be tested according to the running information comprises the following steps:
if the set working condition is a second working condition, determining a target maximum braking acceleration which can be reached by the vehicle to be tested when the residual electric quantity is reduced to a target residual electric quantity according to the acceleration information and the residual electric quantity information, wherein the target residual electric quantity is within a normal braking electric quantity range of a single pedal; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the normal braking electric quantity range of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed;
multiplying the target maximum braking acceleration by a preset proportional coefficient to obtain the target braking acceleration of the vehicle to be tested;
and determining the target residual capacity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual capacity information, and taking the target residual capacity as the single-pedal braking highest residual capacity of the vehicle to be tested.
2. The method of claim 1, wherein determining braking information of the vehicle under test in a single-pedal state from the driving information comprises:
if the set working condition is a first working condition, determining a time period when the opening of the accelerator pedal is zero as a braking time period according to the opening information of the accelerator pedal, wherein the first working condition is a working condition that a running road surface is a horizontal road surface, the residual electric quantity of the power battery is within a normal braking electric quantity range of a single pedal, and the pedal is released when the running mode is accelerated to a first preset speed;
and determining the maximum braking acceleration of the vehicle to be tested in the braking time period according to the acceleration information, and taking the maximum braking acceleration as the single-pedal maximum braking acceleration of the vehicle to be tested.
3. The method of claim 2, further comprising:
and determining the single-pedal maximum braking acceleration response time of the vehicle to be tested according to the starting time of the braking time period and the time when the acceleration of the vehicle to be tested reaches the maximum braking acceleration.
4. The method of claim 1, wherein determining braking information of the vehicle under test in a single-pedal state from the driving information comprises:
if the set working condition is a third working condition, determining whether the vehicle to be tested can normally stop when running on each road surface according to the speed information so as to obtain the maximum braking parking gradient of the single pedal of the vehicle to be tested, wherein the third working condition is that the running road surface comprises a plurality of road surfaces with different gradients, the residual electric quantity of the power battery is within the normal braking electric quantity range of the single pedal, and the running mode is that the pedal is released when the vehicle is accelerated to a third preset speed on each road surface respectively;
and determining the vehicle sliding distance of the vehicle to be tested when the vehicle to be tested is braked at the maximum braking acceleration on the road surface with the gradient of the single-pedal maximum braking parking gradient, and taking the vehicle sliding distance as the single-pedal maximum gradient parking distance of the vehicle to be tested.
5. The method according to any one of claims 1-4, further comprising, after said determining single pedal braking information for said vehicle under test from said driving information:
and generating a driving performance evaluation result of the vehicle to be tested in a single-pedal state according to the single-pedal braking information, and displaying the driving performance evaluation result to a tester.
6. A single pedal brake test device, comprising:
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring running information of a vehicle to be tested when the vehicle runs under a set working condition, and the running information comprises at least one item of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery;
the determining module is used for determining the single-pedal braking information of the vehicle to be tested according to the running information;
the determining module comprises: a second acceleration determination unit and a third acceleration determination unit;
the second acceleration determining unit is further configured to determine, when the set working condition is a second working condition, a target maximum braking acceleration that can be reached by the vehicle to be tested when the remaining power is reduced to a target remaining power according to the acceleration information and the remaining power information, where the target remaining power is within a range of normal braking power of a single pedal; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the normal braking electric quantity range of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed;
the third acceleration determining unit is further configured to multiply the target maximum braking acceleration by a preset proportional coefficient to obtain a target braking acceleration of the vehicle to be tested; and the electric quantity determining unit is used for determining the target residual electric quantity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual electric quantity information, and the target residual electric quantity is used as the single-pedal braking highest residual electric quantity of the vehicle to be tested.
7. A computer device, comprising:
one or more processors;
a memory for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a single pedal braking test method as recited in any of claims 1-5.
8. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the single-pedal braking test method according to any one of claims 1 to 5.
9. A single-pedal brake test system is characterized by comprising a speed sensor, an acceleration sensor, a vehicle control unit, a battery controller, data acquisition equipment and computer equipment, wherein,
the speed sensor is connected with the data acquisition equipment and used for acquiring speed information of a vehicle to be tested and sending the speed information to the data acquisition equipment;
the acceleration sensor is connected with the data acquisition equipment and used for acquiring acceleration information of the vehicle to be tested and sending the acceleration information to the data acquisition equipment;
the vehicle control unit is connected with the data acquisition equipment and used for acquiring the opening information of an accelerator pedal of the vehicle to be tested and sending the opening information of the accelerator pedal to the data acquisition equipment;
the battery controller is connected with the data acquisition equipment and is used for acquiring the residual electric quantity information of the power battery of the vehicle to be tested and sending the residual electric quantity information to the data acquisition equipment;
the data acquisition equipment is connected with the computer equipment and is used for forwarding the received speed information, the received acceleration information, the received accelerator pedal opening information and the received residual electric quantity information to the computer equipment;
the computer equipment is used for determining the single-pedal braking information of the vehicle to be tested according to the speed information, the acceleration information, the accelerator pedal opening information and the residual electric quantity information sent by the acquisition equipment; in the single-pedal brake testing system, when a vehicle to be tested runs under a set working condition, running information of the vehicle to be tested is obtained, wherein the running information comprises at least one of speed information, acceleration information, opening information of an accelerator pedal and residual electric quantity information of a power battery; thereby determining the single-pedal braking information of the vehicle to be tested according to the acquired running information;
the determining of the single-pedal braking information of the vehicle to be tested according to the running information comprises the following steps: if the set working condition is a second working condition, determining a target maximum braking acceleration which can be reached by the vehicle to be tested when the residual electric quantity is reduced to a target residual electric quantity according to the acceleration information and the residual electric quantity information, wherein the target residual electric quantity is within a normal braking electric quantity range of a single pedal; the second working condition is that the driving road surface is a horizontal road surface, the initial residual electric quantity of the power battery is out of the normal braking electric quantity range of the single pedal, and the driving mode is that the pedal is released when the vehicle to be tested is accelerated to a second preset speed; multiplying the target maximum braking acceleration by a preset proportional coefficient to obtain the target braking acceleration of the vehicle to be tested; and determining the target residual capacity of the power battery of the vehicle to be tested when the maximum braking acceleration of the vehicle to be tested is the target braking acceleration according to the acceleration information and the residual capacity information, and taking the target residual capacity as the single-pedal braking highest residual capacity of the vehicle to be tested.
CN201911243472.9A 2019-12-06 2019-12-06 Single-pedal brake testing method, device, equipment, storage medium and system Active CN110949394B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911243472.9A CN110949394B (en) 2019-12-06 2019-12-06 Single-pedal brake testing method, device, equipment, storage medium and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911243472.9A CN110949394B (en) 2019-12-06 2019-12-06 Single-pedal brake testing method, device, equipment, storage medium and system

Publications (2)

Publication Number Publication Date
CN110949394A CN110949394A (en) 2020-04-03
CN110949394B true CN110949394B (en) 2021-03-30

Family

ID=69980282

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911243472.9A Active CN110949394B (en) 2019-12-06 2019-12-06 Single-pedal brake testing method, device, equipment, storage medium and system

Country Status (1)

Country Link
CN (1) CN110949394B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112622614A (en) * 2020-12-18 2021-04-09 的卢技术有限公司 Single-pedal control system and control method thereof
CN113218349B (en) * 2021-04-30 2022-05-20 安徽江淮汽车集团股份有限公司 Sensor installation device
CN113799790B (en) * 2021-10-19 2023-07-21 中国第一汽车股份有限公司 Vehicle speed control performance testing method and device, electronic equipment and medium
CN114701474B (en) * 2022-04-26 2023-02-17 宁波小遛共享信息科技有限公司 Method and device for detecting brake abnormity of electric bicycle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709338A (en) * 1970-09-28 1973-01-09 E Glen Single pedal brake-accelerator mechanism with cruise control
US6499376B2 (en) * 1999-12-24 2002-12-31 Bck Technology Limited Pedal box for vehicle etc
JP2009193369A (en) * 2008-02-14 2009-08-27 Chiyoda Kogyo Kk Pedal support structure of automobile
CN108082152A (en) * 2017-11-27 2018-05-29 北京新能源汽车股份有限公司 A kind of control method of single pedal automobile, device and single pedal automobile
CN109100157A (en) * 2018-08-20 2018-12-28 中国汽车技术研究中心有限公司 One kind driving system safety testing device and method for P2 configuration hybrid vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709338A (en) * 1970-09-28 1973-01-09 E Glen Single pedal brake-accelerator mechanism with cruise control
US6499376B2 (en) * 1999-12-24 2002-12-31 Bck Technology Limited Pedal box for vehicle etc
JP2009193369A (en) * 2008-02-14 2009-08-27 Chiyoda Kogyo Kk Pedal support structure of automobile
CN108082152A (en) * 2017-11-27 2018-05-29 北京新能源汽车股份有限公司 A kind of control method of single pedal automobile, device and single pedal automobile
CN109100157A (en) * 2018-08-20 2018-12-28 中国汽车技术研究中心有限公司 One kind driving system safety testing device and method for P2 configuration hybrid vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"纯电动汽车单踏板制动关键技术研究";马欢欢等;《2019中国汽车工程学会年会》;20191022;第1765-1769页 *

Also Published As

Publication number Publication date
CN110949394A (en) 2020-04-03

Similar Documents

Publication Publication Date Title
CN110949394B (en) Single-pedal brake testing method, device, equipment, storage medium and system
CN110103719B (en) Charging prompting method and system of electric automobile and vehicle
US10436602B2 (en) Apparatus and method for providing optimal gear advice
CN107180288B (en) Driving behavior energy consumption measuring and calculating method and device, storage medium and electronic equipment
US20180370537A1 (en) System providing remaining driving information of vehicle based on user behavior and method thereof
US8068974B2 (en) Methods and systems for determining driver efficiency and operating modes in a hybrid vehicle
CN111806239A (en) Electric vehicle endurance mileage measuring method, electronic device, and storage medium
CN108001453B (en) Method and system for identifying high-energy-consumption driving behaviors
US8660784B2 (en) Methods and systems for determining driver efficiency in a vehicle
CN112113774B (en) Ramp detection method, detection terminal and storage medium
CN108982122B (en) Method and device for evaluating influence of dragging torque on energy consumption of automobile
CN113281065B (en) Dynamic test and evaluation method for working conditions of medium and small throttle of automatic transmission automobile
CN104980470A (en) Automobile simulation system and portable terminal implementing same
CN207440847U (en) Travelling data processing unit and system
CN111783229A (en) Method and device for generating simulated traffic flow
CN109781436A (en) A kind of vehicle drive mode Economic Analysis Method
CN113588287A (en) Vehicle acceleration performance testing and evaluating method
CN115837918B (en) Safe oil consumption reduction method and system based on scientific uphill and downhill driving guidance of commercial vehicle
CN110588661A (en) Driving evaluation device, driving evaluation method, and non-transitory readable recording medium storing driving evaluation program
CN114999150A (en) Road section congestion judging method and device, vehicle and storage medium
CN113962107A (en) Method and device for simulating driving road section, electronic equipment and storage medium
CN112406560A (en) Method and device for adjusting generated power of range extender, storage medium and vehicle
CN111845357A (en) Vehicle and method for providing fuel efficiency information of vehicle
GB2579559A (en) System and method for providing an indication of driving performance
GB2579558A (en) System and method for providing an indication of driving performance

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