CN110160802A - Automobile climbing vehicle speed measurement method and electronic equipment - Google Patents

Automobile climbing vehicle speed measurement method and electronic equipment Download PDF

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Publication number
CN110160802A
CN110160802A CN201910429221.3A CN201910429221A CN110160802A CN 110160802 A CN110160802 A CN 110160802A CN 201910429221 A CN201910429221 A CN 201910429221A CN 110160802 A CN110160802 A CN 110160802A
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speed
vehicle
resistance
power
gradient
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CN110160802B (en
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崔文宾
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WM Smart Mobility Shanghai Co Ltd
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WM Smart Mobility Shanghai Co Ltd
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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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  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
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Abstract

The present invention discloses a kind of automobile climbing vehicle speed measurement method and electronic equipment, and method includes: to obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；According to complete vehicle quality, the speed and time corresponding with the speed, the corresponding relationship of vehicle road resistance and speed is determined；The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains the corresponding relationship of gradient resistance and speed；The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding speed, obtains resistance power speed corresponding relationship curve；Vehicle power power speed corresponding relationship curve is obtained, using the intersection point of the resistance power speed corresponding relationship curve and the vehicle power power speed corresponding relationship curve as the climbing speed under the gradient.Test method of the present invention is simple, and efficiency is obviously improved, and effectively reduces testing cost, and modification method is simple, scalability is strong.

Description

Automobile climbing vehicle speed measurement method and electronic equipment
Technical field
The present invention relates to automobile correlative technology field, especially a kind of automobile climbing vehicle speed measurement method and electronic equipment.
Background technique
Automobile climbing speed test is an important tests in automobile dynamic quality test.For example, about electric car In speed of climbing test, existing GB/T 18385-2005 requires 4% under maximum design total mass of test electric car Climbing speed with 12% is tested.Test method requires that vehicle is placed on chassis dynamometer and increases it by a gradient to carry Lotus.Climbing speed is tested by chassis dynamometer to first have to ask through the progress road load calculating of road taxi data, then will The Resistance Value being calculated is input on chassis dynamometer.
However, the measurement of the prior art, test result it is effective on condition that chassis dynamometer allow for it is accurate, reliable Simulated roadway resistance, the requirement to chassis dynamometer is very high.Meanwhile chassis dynamometer testing cost is higher, especially in early period The performance evaluation stage may need repeatedly to test, this also just further increases testing cost.
Summary of the invention
Based on this, it is necessary to the measurement of automobile climbing speed be needed to increase on chassis dynamometer for the prior art Gradient load provides a kind of automobile climbing vehicle speed measurement method and electronics sets so as to cause the technical problem that testing cost is excessively high It is standby.
The present invention provides a kind of automobile climbing vehicle speed measurement method, comprising:
Obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
According to complete vehicle quality, the speed and time corresponding with the speed, vehicle road resistance and speed are determined Corresponding relationship；
The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains pair of gradient resistance and speed It should be related to；
The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding vehicle Speed obtains resistance power speed corresponding relationship curve；
Obtain vehicle power power speed corresponding relationship curve, by the resistance power speed corresponding relationship curve with it is described The intersection point of vehicle power power speed corresponding relationship curve is as the climbing speed under the gradient.
The embodiment of the present invention relies on that vehicle slides and theoretical calculation eliminates rotary drum compared with traditional chassis dynamometer The influence of consistency difference.Simultaneously as vehicle slides this as necessary a part in vehicle performance development experiments, vehicle is shared Coast-down check is as a result, greatly reduce the expense of rotary drum test.
Further, described according to complete vehicle quality, the speed and time corresponding with the speed, determine vehicle The corresponding relationship of road resistance and speed, specifically includes:
The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates Vehicle road resistance is complete vehicle quality × speed difference/time difference, when will be corresponding in the vehicle road resistance and two speeds Between earlier above speed association；
Multiple vehicle road resistances are fitted with associated speed, it is corresponding with speed to obtain vehicle road resistance Relationship.
The present embodiment calculates vehicle road resistance according to speed, and obtains pair of vehicle road resistance and speed by fitting It should be related to, so that vehicle road resistance and the corresponding relationship of speed are more accurate.
Further, described to be fitted multiple vehicle road resistances with associated speed, obtain vehicle road The corresponding relationship of resistance and speed, specifically includes:
The speed is modified to the speed under preset temperature value；
Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and vehicle are obtained The corresponding relationship of speed.
Speed is modified to the speed under preset temperature value by the present embodiment, is more in line with actual vehicle running temperature.
Further, the grade resistance vehicle road resistance being modified to for presetting the gradient, specifically includes:
Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is vehicle matter Amount, the ɑ are the default gradient.
Vehicle road resistance is scaled grade resistance, without increasing gradient load, in fact by calculating by the present embodiment It is now slided by vehicle to calculate grade resistance.
Further, described that the resistance power that vehicle is subject to is calculated according to the gradient resistance, it specifically includes:
Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
The present embodiment converts the drag overall power of vehicle, is more met vehicle actual motion by efficiency constant Resistance power.
The present invention provides a kind of electronic equipment for automobile climbing vehicle speed measurement, comprising:
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by one processor, and described instruction is by described at least one Manage device execute so that at least one described processor can:
Obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
According to complete vehicle quality, the speed and time corresponding with the speed, vehicle road resistance and speed are determined Corresponding relationship；
The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains pair of gradient resistance and speed It should be related to；
The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding vehicle Speed obtains resistance power speed corresponding relationship curve；
Obtain vehicle power power speed corresponding relationship curve, by the resistance power speed corresponding relationship curve with it is described The intersection point of vehicle power power speed corresponding relationship curve is as the climbing speed under the gradient.
The embodiment of the present invention relies on that vehicle slides and theoretical calculation eliminates rotary drum compared with traditional chassis dynamometer The influence of consistency difference.Simultaneously as vehicle slides this as necessary a part in vehicle performance development experiments, vehicle is shared Coast-down check is as a result, greatly reduce the expense of rotary drum test.
Further, described according to complete vehicle quality, the speed and time corresponding with the speed, determine vehicle The corresponding relationship of road resistance and speed, specifically includes:
The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates Vehicle road resistance is complete vehicle quality × speed difference/time difference, when will be corresponding in the vehicle road resistance and two speeds Between earlier above speed association；
Multiple vehicle road resistances are fitted with associated speed, it is corresponding with speed to obtain vehicle road resistance Relationship.
The present embodiment calculates vehicle road resistance according to speed, and obtains pair of vehicle road resistance and speed by fitting It should be related to, so that vehicle road resistance and the corresponding relationship of speed are more accurate.
Further, described to be fitted multiple vehicle road resistances with associated speed, obtain vehicle road The corresponding relationship of resistance and speed, specifically includes:
The speed is modified to the speed under preset temperature value；
Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and vehicle are obtained The corresponding relationship of speed.
Speed is modified to the speed under preset temperature value by the present embodiment, is more in line with actual vehicle running temperature.
Further, the grade resistance vehicle road resistance being modified to for presetting the gradient, specifically includes:
Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is vehicle matter Amount, the ɑ are the default gradient.
Vehicle road resistance is scaled grade resistance, without increasing gradient load, in fact by calculating by the present embodiment It is now slided by vehicle to calculate grade resistance.
Further, described that the resistance power that vehicle is subject to is calculated according to the gradient resistance, it specifically includes:
Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
The present embodiment converts the drag overall power of vehicle, is more met vehicle actual motion by efficiency constant Resistance power.
Test method of the present invention is simple, and efficiency is obviously improved, and effectively reduces testing cost, and modification method is simple, can Scalability is strong.
Detailed description of the invention
Fig. 1 is a kind of work flow diagram of automobile climbing vehicle speed measurement method of the present invention；
Fig. 2 is the workflow that a kind of electric car climbing vehicle speed measurement method of preferred embodiment includes Coast-down check Cheng Tu；
Fig. 3 is a kind of hardware structural diagram of the electronic equipment for automobile climbing vehicle speed measurement of the present invention.
Specific embodiment
The present invention will be further described in detail in the following with reference to the drawings and specific embodiments.
It is as shown in Figure 1 a kind of work flow diagram of automobile climbing vehicle speed measurement method of the present invention, comprising:
Step S101 obtains multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
Step S102 determines vehicle road according to complete vehicle quality, the speed and time corresponding with the speed The corresponding relationship of resistance and speed；
The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains gradient resistance by step S103 With the corresponding relationship of speed；
The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power in step S104 And corresponding speed, obtain resistance power speed corresponding relationship curve；
Step S105 obtains vehicle power power speed corresponding relationship curve, by the resistance power speed corresponding relationship The intersection point of curve and the vehicle power power speed corresponding relationship curve is as the climbing speed under the gradient.
Specifically, the speed of step S101 and time test from vehicle sliding.Vehicle sliding test is preferred are as follows: starting And accelerate automobile, so that the sliding speed of vehicle is at least up to 120km/h, the vehicle of 120km/h is lower than for vehicle max. speed It is set to slide 0.6-0.8 times (being recommended as 0.8 times) that speed reaches max. speed.Sliding forwards are carried out first, and automobile is linked into sky Gear slides and measures the coasting time corresponding with several speed points of several speed points in taxiing procedures.Then it is reversely slided Row is to eliminate road out-of-flatness bring error.It repeats the above steps repeatedly, to eliminate accidental error.
Then, step S102 is calculated, vehicle according to above-mentioned several speed points measured time corresponding with the speed point Road resistance and speed corresponding relationship curve.
The vehicle road resistance tested by vehicle sliding and speed corresponding relationship curve amendment be by step S103 About the gradient resistance of the default gradient and the corresponding relationship of speed, it is therefore not necessary to increase gradient load.Then, step S104 root After calculating corresponding resistance power according to grade resistance, step S105 is executed, obtains vehicle power power speed corresponding relationship curve, Using the intersection point of the resistance power speed corresponding relationship curve and the vehicle power power speed corresponding relationship curve as institute State the climbing speed under the gradient.Wherein, vehicle power power speed corresponding relationship curve can be obtained according to the prior art.Example It such as, then can be using power of motor characteristic curve as vehicle power power speed for electric vehicle.Wherein, power of motor is special Linearity curve is the relation curve of maximum power and speed that can be exported in motor, by the prior art, consider retarder speed ratio, And the parameters such as vehicle wheel roll radius, it converts into motor speed to speed, obtains the relation curve of power of motor and speed.For combustion Oily vehicle, then can be using engine power characteristic curve as vehicle power power speed.By the prior art, engine is considered The parameters such as the speed ratio of torque, retarder obtain the relation curve of engine power and speed.
The embodiment of the present invention relies on that vehicle slides and theoretical calculation eliminates rotary drum compared with traditional chassis dynamometer The influence of consistency difference.Simultaneously as vehicle slides this as necessary a part in vehicle performance development experiments, vehicle is shared Coast-down check is as a result, greatly reduce the expense of rotary drum test.
In one of the embodiments, it is described according to complete vehicle quality, the speed and it is corresponding with the speed when Between, it determines the corresponding relationship of vehicle road resistance and speed, specifically includes:
The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates Vehicle road resistance is complete vehicle quality × speed difference/time difference, when will be corresponding in the vehicle road resistance and two speeds Between earlier above speed association；
Multiple vehicle road resistances are fitted with associated speed, it is corresponding with speed to obtain vehicle road resistance Relationship.
The present embodiment calculates vehicle road resistance according to speed, and obtains pair of vehicle road resistance and speed by fitting It should be related to, so that vehicle road resistance and the corresponding relationship of speed are more accurate.
It is described in one of the embodiments, to be fitted multiple vehicle road resistances with associated speed, it obtains The corresponding relationship of vehicle road resistance and speed, specifically includes:
The speed is modified to the speed under preset temperature value；
Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and vehicle are obtained The corresponding relationship of speed.
Speed is modified to the speed under preset temperature value by the present embodiment, is more in line with actual vehicle running temperature.
The gradient resistance vehicle road resistance being modified to for presetting the gradient in one of the embodiments, Power specifically includes:
Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is vehicle matter Amount, the ɑ are the default gradient.
Vehicle road resistance is scaled grade resistance, without increasing gradient load, in fact by calculating by the present embodiment It is now slided by vehicle to calculate grade resistance.
It is described in one of the embodiments, that the resistance power that vehicle is subject to, tool are calculated according to the gradient resistance Body includes:
Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
The present embodiment converts the drag overall power of vehicle, is more met vehicle actual motion by efficiency constant Resistance power.
Being illustrated in figure 2 a kind of electric car climbing vehicle speed measurement method of preferred embodiment includes Coast-down check Work flow diagram, comprising:
Step S201, detection measuring state, each spare parts logistics of confirmation vehicle, software version, complete vehicle quality are before testing It is no to meet test requirements document；
Step S202 tests the weight of vehicle, with being loaded onto design maximum quality；
Step S203 starts and accelerates automobile, and the sliding speed of vehicle is made to be at least up to 120km/h, for vehicle highest Vehicle of the speed lower than 120km/h makes it slide 0.6-0.8 times that speed reaches max. speed, preferably 0.8 times；
Step S204, sliding forwards, if automobile is linked into neutral position sliding and measures several speed points in taxiing procedures and be somebody's turn to do The corresponding coasting time of dry speed point；Reversely slide to eliminate road out-of-flatness bring error；
More times of step S205, repeat the above steps S203, S204, to eliminate accidental error；
Step S206 calculates according to above-mentioned several speed points measured time corresponding with the speed point, passes through fitting Obtain FIt is sliding=av2+ bv+c is used as vehicle road resistance and speed corresponding relationship curve, wherein FIt is slidingFor vehicle road resistance, a, b, c It is matched curve to fitting parameter；
Step S207 carries out temperature adjustmemt to speed v according to attachment CH in GB 18352.5-2013；
Vehicle road resistance is modified to the grade resistance F=F for presetting the gradient by step S208It is sliding+Gsinɑ；
Step S209 calculates total resistance power Pall=F × v that vehicle is subject at speed v；
Step S210 calculates automobile maximum resistance power P e using power-balance formula η × Pe=Pall, and wherein η is effect Rate constant, preferably less than 1 is greater than 0 efficiency constant；
Step S210 determines resistance power speed corresponding relationship curve according to the corresponding maximum resistance power of each speed point, Curve and the characteristic crosspoint of power of motor are obtained as the climbing speed under the gradient.
As an example, certain electric vehicle is according to GB/T 18385-2005 requirement test electric car in design maximum 4% climbing speed under gross mass, the vehicle motor power 130kw, η are empirical value, take 0.95.Vehicle coasting test condition: Bituminous pavement, head fall are slided to obtain vehicle and be slided within 0.3%, mean wind speed 3m/s, 20 DEG C, relative humidity 45% Curve, it is 159km/h that test, which reaches 4% climbing speed, on rotary drum.What method proposed according to the present invention calculated the vehicle 4% climbs Slope speed is 155km/h, can prove that result is reliable.
The invention has the following advantages that
1, test method is simple, and efficiency is obviously improved
This climbing speed test method mainly relies on vehicle and slides and theoretical calculation, compared with traditional chassis dynamometer, Eliminate the influence of rotary drum consistency difference.
2, testing cost is effectively reduced
Since vehicle slides this as necessary a part in vehicle performance development experiments, vehicle Coast-down check knot is shared Fruit greatly reduces the expense of rotary drum test.
3, modification method is simple, and scalability is strong
It, can be using chassis dynamometer test and this patent when vehicle often has multiple configurations in practical item development The mode that calculation method combines.Chassis dynamometer tests wherein several configurations, and the method for application this patent is calculated, right Compare difference.Remaining several configuration uses the calculation method of this patent and is modified, and can both guarantee the accuracy of calculated result.
It is illustrated in figure 3 a kind of hardware structural diagram of the electronic equipment for automobile climbing vehicle speed measurement of the present invention, Include:
At least one processor 301；And
With the memory 302 of at least one described processor 301 communication connection；Wherein,
The memory 302 is stored with the instruction that can be executed by one processor, and described instruction is by described at least one A processor executes so that at least one described processor can:
Obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
According to complete vehicle quality, the speed and time corresponding with the speed, vehicle road resistance and speed are determined Corresponding relationship；
The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains pair of gradient resistance and speed It should be related to；
The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding vehicle Speed obtains resistance power speed corresponding relationship curve；
Obtain vehicle power power speed corresponding relationship curve, by the resistance power speed corresponding relationship curve with it is described The intersection point of vehicle power power speed corresponding relationship curve is as the climbing speed under the gradient.
Electronic equipment is preferably electronic controller unit (Electronic Control Unit, ECU).With one in Fig. 3 For processor 302.
Electronic equipment can also include: input unit 303 and output device 304.
Processor 301, memory 302, input unit 303 and display device 304 can pass through bus or other modes It connects, in figure for being connected by bus.
Memory 302 is used as a kind of non-volatile computer readable storage medium storing program for executing, can be used for storing non-volatile software journey Sequence, non-volatile computer executable program and module, such as the automobile climbing vehicle speed measurement method pair in the embodiment of the present application Program instruction/the module answered, for example, Fig. 1, method flow shown in Fig. 2.Processor 301 is stored in memory 302 by operation In non-volatile software program, instruction and module realized above-mentioned thereby executing various function application and data processing Automobile climbing vehicle speed measurement method in embodiment.
Memory 302 may include storing program area and storage data area, wherein storing program area can store operation system Application program required for system, at least one function；Storage data area can be stored to be made according to automobile climbing vehicle speed measurement method With the data etc. created.In addition, memory 302 may include high-speed random access memory, it can also include non-volatile Memory, for example, at least a disk memory, flush memory device or other non-volatile solid state memory parts.In some realities It applies in example, optional memory 302 includes the memory remotely located relative to processor 301, these remote memories can lead to Network connection is crossed to the device for executing automobile climbing vehicle speed measurement method.The example of above-mentioned network include but is not limited to internet, Intranet, local area network, mobile radio communication and combinations thereof.
The user that input unit 303 can receive input clicks, and generates the user with automobile climbing vehicle speed measurement method Setting and the related signal input of function control.Display device 304 may include that display screen etc. shows equipment.
It is stored in the memory 302 in one or more of modules, when by one or more of processing When device 301 is run, the automobile climbing vehicle speed measurement method in above-mentioned any means embodiment is executed.
The embodiment of the present invention relies on that vehicle slides and theoretical calculation eliminates rotary drum compared with traditional chassis dynamometer The influence of consistency difference.Simultaneously as vehicle slides this as necessary a part in vehicle performance development experiments, vehicle is shared Coast-down check is as a result, greatly reduce the expense of rotary drum test.
In one of the embodiments, it is described according to complete vehicle quality, the speed and it is corresponding with the speed when Between, it determines the corresponding relationship of vehicle road resistance and speed, specifically includes:
The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates Vehicle road resistance is complete vehicle quality × speed difference/time difference, when will be corresponding in the vehicle road resistance and two speeds Between earlier above speed association；
Multiple vehicle road resistances are fitted with associated speed, it is corresponding with speed to obtain vehicle road resistance Relationship.
The present embodiment calculates vehicle road resistance according to speed, and obtains pair of vehicle road resistance and speed by fitting It should be related to, so that vehicle road resistance and the corresponding relationship of speed are more accurate.
It is described in one of the embodiments, to be fitted multiple vehicle road resistances with associated speed, it obtains The corresponding relationship of vehicle road resistance and speed, specifically includes:
The speed is modified to the speed under preset temperature value；
Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and vehicle are obtained The corresponding relationship of speed.
Speed is modified to the speed under preset temperature value by the present embodiment, is more in line with actual vehicle running temperature.
The gradient resistance vehicle road resistance being modified to for presetting the gradient in one of the embodiments, Power specifically includes:
Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is vehicle matter Amount, the ɑ are the default gradient.
Vehicle road resistance is scaled grade resistance, without increasing gradient load, in fact by calculating by the present embodiment It is now slided by vehicle to calculate grade resistance.
It is described in one of the embodiments, that the resistance power that vehicle is subject to, tool are calculated according to the gradient resistance Body includes:
Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
The present embodiment converts the drag overall power of vehicle, is more met vehicle actual motion by efficiency constant Resistance power.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

  1. The vehicle speed measurement method 1. a kind of automobile is climbed characterized by comprising
    Obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
    According to complete vehicle quality, the speed and time corresponding with the speed, pair of vehicle road resistance and speed is determined It should be related to；
    The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains gradient resistance pass corresponding with speed System；
    The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding speed, Obtain resistance power speed corresponding relationship curve；
    Vehicle power power speed corresponding relationship curve is obtained, by the resistance power speed corresponding relationship curve and the vehicle The intersection point of aerodynamic power speed corresponding relationship curve is as the climbing speed under the gradient.
  2. The vehicle speed measurement method 2. automobile according to claim 1 is climbed, which is characterized in that described according to complete vehicle quality, institute Speed and time corresponding with the speed are stated, the corresponding relationship of vehicle road resistance and speed is determined, specifically includes:
    The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates vehicle Road resistance be complete vehicle quality × speed difference/time difference, by the corresponding time in the vehicle road resistance and two speeds compared with Preceding speed association；
    Multiple vehicle road resistances are fitted with associated speed, obtain vehicle road resistance pass corresponding with speed System.
  3. The vehicle speed measurement method 3. automobile according to claim 2 is climbed, which is characterized in that described by multiple vehicle roads roadlock Power is fitted with associated speed, is obtained the corresponding relationship of vehicle road resistance and speed, is specifically included:
    The speed is modified to the speed under preset temperature value；
    Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and speed are obtained Corresponding relationship.
  4. The vehicle speed measurement method 4. automobile according to claim 1 is climbed, which is characterized in that described by vehicle road roadlock Power is modified to the grade resistance for presetting the gradient, specifically includes:
    Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is complete vehicle quality, institute Stating ɑ is the default gradient.
  5. The vehicle speed measurement method 5. automobile according to claim 1 is climbed, which is characterized in that described according to the gradient resistance The resistance power that vehicle is subject to is calculated, specifically includes:
    Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
    Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
  6. 6. a kind of electronic equipment for automobile climbing vehicle speed measurement characterized by comprising
    At least one processor；And
    The memory being connect at least one described processor communication；Wherein,
    The memory is stored with the instruction that can be executed by one processor, and described instruction is by least one described processor Execute so that at least one described processor can:
    Obtain multiple speeds and the time corresponding with the speed obtained in vehicle sliding test；
    According to complete vehicle quality, the speed and time corresponding with the speed, pair of vehicle road resistance and speed is determined It should be related to；
    The vehicle road resistance is modified to the grade resistance for presetting the gradient, obtains gradient resistance pass corresponding with speed System；
    The resistance power that vehicle is subject to is calculated according to the gradient resistance, according to the resistance power and corresponding speed, Obtain resistance power speed corresponding relationship curve；
    Vehicle power power speed corresponding relationship curve is obtained, by the resistance power speed corresponding relationship curve and the vehicle The intersection point of aerodynamic power speed corresponding relationship curve is as the climbing speed under the gradient.
  7. 7. the electronic equipment according to claim 6 for automobile climbing vehicle speed measurement, which is characterized in that described according to whole It vehicle quality, the speed and time corresponding with the speed, determines the corresponding relationship of vehicle road resistance and speed, has Body includes:
    The difference of two speeds is calculated as speed difference, the difference of speed corresponding time is calculated as the time difference, calculates vehicle Road resistance be complete vehicle quality × speed difference/time difference, by the corresponding time in the vehicle road resistance and two speeds compared with Preceding speed association；
    Multiple vehicle road resistances are fitted with associated speed, obtain vehicle road resistance pass corresponding with speed System.
  8. 8. it is according to claim 7 for automobile climbing vehicle speed measurement electronic equipment, which is characterized in that it is described will be multiple Vehicle road resistance is fitted with associated speed, is obtained the corresponding relationship of vehicle road resistance and speed, is specifically included:
    The speed is modified to the speed under preset temperature value；
    Multiple vehicle road resistances and associated revised speed are fitted, vehicle road resistance and speed are obtained Corresponding relationship.
  9. 9. the electronic equipment according to claim 6 for automobile climbing vehicle speed measurement, which is characterized in that it is described will be described Vehicle road resistance is modified to the grade resistance for presetting the gradient, specifically includes:
    Calculate grade resistance F=FIt is sliding+ Gsin ɑ, wherein the FIt is slidingFor the vehicle road resistance, the G is complete vehicle quality, institute Stating ɑ is the default gradient.
  10. 10. the electronic equipment according to claim 6 for automobile climbing vehicle speed measurement, which is characterized in that the basis The resistance power that vehicle is subject to is calculated in the gradient resistance, specifically includes:
    Calculate the drag overall power P that vehicle is subject toall=F × v, wherein F is grade resistance, and v is corresponding speed；
    Calculating resistance power is Pe=Pall/ η, wherein η is default efficiency constant.
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113076604A (en) * 2021-04-28 2021-07-06 安徽江淮汽车集团股份有限公司 Road sliding test method, device, equipment and storage medium
CN113753061A (en) * 2021-08-16 2021-12-07 中交第二公路勘察设计研究院有限公司 Climbing balance speed prediction method based on typical truck power-weight ratio

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