CN104729859B - Automobile climbing method of testing and test system - Google Patents
Automobile climbing method of testing and test system Download PDFInfo
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- CN104729859B CN104729859B CN201310701563.9A CN201310701563A CN104729859B CN 104729859 B CN104729859 B CN 104729859B CN 201310701563 A CN201310701563 A CN 201310701563A CN 104729859 B CN104729859 B CN 104729859B
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Abstract
The present invention relates to technical field of vehicle, and disclosing a kind of automobile climbing method of testing and test system, the method for testing includes：The preparation process of test environment and test vehicle before S1, experiment；S2, to test vehicle and chassis dynamometer preheat the step of；S3, road coasting test is carried out to test vehicle, while record the service data during experiment；S4, according to the data recorded in step S3 data analysis and comparison are carried out, and judge whether the grade climbing performance of vehicle meets design requirement.The present invention carries out grade climbing performance test using chassis dynamometer simulation actual track to the grade climbing performance of vehicle, and gather the service data of vehicle during experiment, its data acquisition is simple, convenient, fast, the data precision of collection is higher, test method safety, and experimentation cost can be lowered significantly.
Description
Technical field
The present invention relates to technical field of vehicle, more particularly to a kind of automobile climbing method of testing and test system.
Background technology
Vehicle test is the checking most important method of vehicle performance, is had in the exploitation, verification process in vehicle important
Effect, wherein grade climbing performance are to weigh a key factor of vehicle engine power.
What the road that traditional automobile climb very steep slopes experiment is all based on outdoor was carried out, during experiment, data acquisition is not square
Just, have if testing in automobile max. climb slope very big difficult and certain danger be present, test accuracy is poor；Repeatability is poor
And had a great influence by external environmental condition, it is difficult to test automobile max. climb slope.
The content of the invention
（One）Technical problems to be solved
The technical problem to be solved in the present invention is how accurately and effectively to carry out vehicle grade climbing performance test.
（Two）Technical scheme
In order to solve the above-mentioned technical problem, a kind of automobile climbing method of testing provided by the invention, it includes：
The preparation process of test environment and test vehicle before S1, experiment；
S2, to test vehicle and chassis dynamometer preheat the step of；
S3, road coasting test is carried out to test vehicle, while record the service data during experiment, road slides examination
The step of testing includes：
S10, chassis dynamometer set road analogy resistance coefficient, carry out road coasting test, and judge slide whether
Normally；
S20, if it is determined that sliding normal, then gradually increase the domatic gradient, until ensureing that engine speed reaches maximum
Moment of torsion rotating speed and speed stabilization, record speed, the gradient and Direct wheel drives power now, and the grade climbing performance of vehicle is divided
Analysis；
S30, carry out maximum hill climbing test；
S4, according to the data recorded in step S3 data analysis and comparison are carried out, and judge that the grade climbing performance of vehicle is
It is no to meet design requirement.
Further, in S1 test vehicle preparation process, including：Road is carried out to test vehicle and slides survey on the spot
Examination, to obtain real road resistance of taxing equation, establishes road analogy pattern on chassis dynamometer.
Further, after step S30, in addition to step S40, progress uphill starting experiment.
Further, in S2 preheating step, including：Chassis dynamometer is set under road analogy pattern, using car
Driving rotary drum forward direction test model, the adjustment gradient load to the transmission system for testing vehicle, make starting for test vehicle
Machine and transmission system reach normal working temperature.
Further, test vehicle is preheated using performance curve.
Further, after the completion of to test vehicle preheating, chassis dynamometer is set under the anti-drag mode formula of constant speed, with default
Speed, drag test vehicle with rotary drum is counter, if the resistance power of driver without significant change, illustrates that preheating is abundant, can enter
The step of trade road coasting test；Otherwise continue to preheat test vehicle.
Further, during experiment in step s 30：Engine speed is not less than speed at maximum torque, and speed
Stabilization time is not less than 10s, and range ability is not less than 25m, without exception after engine idling 3-5min.
Further, when carrying out climbing test, the speed changer for testing vehicle selects one grade, and back gauge power mistake is taken turns when one grade
During most bull wheel side absorbability that is big and exceeding chassis dynamometer, then tested using more high tap position.
The present invention also provides a kind of automobile climbing test system, and it includes：
Power supply, powered for whole test system；
Chassis dynamometer, its rotary drum be placed in test vehicle driving wheel under, for test vehicle provides road load simulation with
Actual road test condition；
Data acquisition equipment, for collection vehicle gradually increase the gradient it is domatic on travel when service data；
DAF, for being analyzed and being compared according to the service data gathered, to judge the climbing of vehicle
Whether performance meets design requirement；
Controller, for controlling chassis dynamometer to carry out vehicle hill climbing test.
Further, the data acquisition equipment include vehicle-mounted data measuring system, temperature sensor, pressure sensor and
Engine speed instrument；The pressure and temperature parameter of air inlet system and exhaust system that the vehicle-mounted data measuring system is used for test engine is
No the temperature sensor is used for the temperature for gathering environment in the reasonable scope, and the pressure sensor is used to gather environment
Atmospheric pressure, the engine speed instrument are used for the real-time rotating speed of engine of collection vehicle.
（Three）Beneficial effect
A kind of automobile climbing method of testing and test system that above-mentioned technical proposal is provided, are simulated using chassis dynamometer
Actual track carries out grade climbing performance test to the grade climbing performance of vehicle, and gathers the service data of vehicle during experiment, and it is counted
Simple, convenient, fast according to gatherer process, the data precision of collection is higher, the test method safety, and can lower significantly experiment into
This.
Brief description of the drawings
Fig. 1 is the structural representation of automobile climbing test system of the present invention；
Fig. 2 is the flow chart of automobile climbing method of testing of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In the description of the invention, it is necessary to which the orientation of the instruction such as explanation, term " on ", " under " or position relationship are base
In orientation shown in the drawings or position relationship, description description of the invention and simplified, rather than instruction or hint are for only for ease of
Signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of invention.
As depicted in figs. 1 and 2, a kind of automobile of the invention climbing method of testing, it is specifically included：
The preparation process of test environment and test vehicle before S1, experiment；
Specially：Require that site environment should meet before testing experiment：Humidity is no more than 95%, 0-40 DEG C of temperature, atmospheric pressure
90-110kpa；·
And lab-size equipment is checked, it is ensured that testing equipment function uses normal；Bottom is roused using alternating electromotive force single-turn
The control accuracy of disk dynamometer machine should be not less than related technical requirements；And the data acquisition equipment supporting with chassis dynamometer, car
Data measurin system household function is carried to use normally.In vehicle preparation process is tested, road should be carried out on the spot to test vehicle
Coast-down check, to obtain real road resistance of taxing equation：F=A+B*V+C*V2, " A " Xiang representatives are not with the constant of velocity variations
Resistance（Such as bearing, sealing ring, tire）；" B " item represents all resistances changed with speed linearity（Such as drivetrain, differential mechanism
Deng）" C " Xiang represents the resistance changed with velocity squared（Such as windage, squeegee action resistance）, " V " item represents the rotating speed of motor；
And road analogy pattern is established on chassis dynamometer.
S2, to test vehicle and chassis dynamometer preheat the step of；
Specially：Chassis dynamometer is set under road analogy pattern, using vehicle traction rotary drum forward direction test model, adjusted
The whole gradient loads to the transmission system for testing vehicle, the engine of test vehicle and transmission system is reached normal work temperature
Degree；Preferably, using performance curve（GB18352）Test vehicle is preheated, the time of whole warm should control
Or so half an hour.
After the completion of to test vehicle preheating, chassis dynamometer is set under the anti-drag mode formula of constant speed, in preset speed, example
Such as with 50km/h speed, test vehicle 3-10 minutes are dragged with rotary drum is counter, preferably drag test vehicle 5 minutes with rotary drum is counter, and
The resistance power of vehicle drive system is measured by dynamometer machine, whether steady, if transmission if analyzing the resistance power of transmission system
The resistance power of system is without significant change, then explanation preheating is abundant, the step of can carrying out road coasting test；Otherwise continue to surveying
Test run is preheated, abundant until preheating.
S3, road coasting test is carried out to test vehicle, while record the service data during experiment, road slides examination
The step of testing specifically includes：
S10, chassis dynamometer set road analogy resistance coefficient, carry out road coasting test, and judge slide whether
Normally：When the actual value of survey and the error of road analogy resistance coefficient are qualified within 2%, it is believed that slide normal；Chassis is surveyed
The road analogy resistance coefficient of work(machine can be set according to the resistance coefficient that road slides on the spot；If no road slides on the spot
Resistance coefficient, refer to the resistance target factor of approximate vehicle to set the road analogy resistance coefficient of chassis dynamometer；
S20, if it is determined that sliding normal, then gradually increase the domatic gradient, until ensureing that engine speed reaches maximum
Moment of torsion rotating speed and speed stabilization, record speed, the gradient and Direct wheel drives power now, and the grade climbing performance of vehicle is divided
Analysis；
S30, carry out maximum hill climbing test；It is specially：Before on-test, it is first determined vehicle slides on real road
Loading mass and road driving target resistance coefficient, then identical loading mass and road row are set on chassis dynamometer
Sail target resistance coefficient.After vehicle is slided on chassis dynamometer, chassis dynamometer setting coefficient is obtained, subsequently into road
Road modeling interface.Because the test competence exertion of climbable gradient when there was only dynamic property maximum goes out effective maximum, and one grade
For the deep low gear of speed changer, the torque value of output is maximum, and therefore, automotive transmission should select one grade, gradually step on accelerator pedal
On earth, while the simulation gradient of chassis dynamometer is applied, until vehicle motor reaches peak load state, in whole process,
Vehicle Speed changes without obvious downward trend, and engine is not shaken, do not stopped working.Vehicle stabilization travels not during experiment
Less than 10s, range ability is not less than 25m, and engine answers idling（3-5）Without exception after min, experiment is completed.Remember during experiment
Record test the gradient, speed, Direct wheel drives power, environment temperature, etc. test data.
Also include step S40 after step S30, carry out uphill starting experiment, be specially：Chassis dynamometer is set to fix
The gradient is simulated, automotive transmission selects one grade, gas pedal is stepped on to full throttle, and the clutch pedal that comes up is until completely loose
Open, more than record data 15s is answered after speed is stable, engine answers without exception, experiment completion after idling (3-5) min.
During experiment, the speed changer for testing vehicle typically all uses one grade of speed, if one grade of Direct wheel drives power is excessive,
More than the most bull wheel side absorbability of chassis dynamometer, then can be tested using higher gear.
S4, according to the data recorded in step S3 data analysis and comparison are carried out, and judge that the grade climbing performance of vehicle is
No to meet design requirement, the design requirement of vehicle grade climbing performance is different different and different with producer according to vehicle.
Data acquisition equipment in test process institute's collection vehicle gradually increase angle it is domatic on travel when operation
Data, until engine speed, to reach speed at maximum torque and speed stable, wherein, the service data comprises at least：Vehicle
When using climb very steep slopes operation on domatic, stable car that speed is dropped under maximum engine torque rotating speed by experiment initial velocity
Speed, Direct wheel drives power；And value of slope of the vehicle on domatic.
According to service data of the data acquisition equipment recorded in test process, vehicle-mounted data measuring system judges vehicle
Grade climbing performance whether meet design requirement.
As shown in figure 1, a kind of automobile climbing test system of the present invention, should for above-mentioned automobile climbing method of testing
Test system includes：Power supply, chassis dynamometer, data acquisition equipment, DAF and controller.Wherein：Power supply is whole
Individual test system power supply；The rotary drum of chassis dynamometer is placed under the driving wheel of test vehicle, and road load is provided for test vehicle
Simulation and actual road test condition；Data acquisition equipment be used for collection vehicle gradually increase the gradient it is domatic on travel when operation
Data；DAF is used to be analyzed and be compared according to the service data gathered, to judge the grade climbing performance of vehicle
Whether design requirement is met；Controller is used to control chassis dynamometer to carry out vehicle hill climbing test, and bottom is can control by controller
Disk dynamometer machine sets the road load simulation being consistent with vehicle actual motion and actual road test condition, and controls chassis dynamometer
The regulation of each parameter during experiment.
Data acquisition equipment includes：Vehicle-mounted data measuring system, temperature sensor, pressure sensor and engine speed
Instrument.Wherein, whether vehicle-mounted data measuring system is used for the relevant parameters such as the pressure and temperature of air inlet system and exhaust system of test engine
In the reasonable scope, temperature sensor is used for the temperature for gathering environment, and pressure sensor is used for the atmospheric pressure for gathering environment, started
Machine rotational speed meters are used for the real-time rotating speed of engine of collection vehicle.
The automobile climbing method of testing and test system of the present invention, actual track is simulated to vehicle using chassis dynamometer
Grade climbing performance carries out grade climbing performance test, and gathers the service data of vehicle during experiment, and its data acquisition is simple, side
Just, fast, the data precision of collection is higher, test method safety, and can lower experimentation cost significantly.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and replacement can also be made, these improve and replaced
Also it should be regarded as protection scope of the present invention.
Claims (6)
- The method of testing 1. a kind of automobile is climbed, it is characterised in that including：The preparation process of test environment and test vehicle before S1, experiment；S2, to test vehicle and chassis dynamometer preheat the step of；S3, road coasting test is carried out to test vehicle, while record the service data during experiment, road coasting test Step includes：S10, chassis dynamometer set road analogy resistance coefficient, carry out road coasting test, and judge slide it is whether normal；S20, if it is determined that sliding normal, then gradually increase the domatic gradient, until ensureing that engine speed reaches peak torque Rotating speed and speed stabilization, record speed, the gradient and Direct wheel drives power now, and the grade climbing performance of vehicle is analyzed；S30, carry out maximum hill climbing test；During experiment：Engine speed is not less than speed at maximum torque, and speed is stable Time is not less than 10s, and range ability is not less than 25m, without exception after engine idling 3-5min；When carrying out climbing test, survey The speed changer of test run selects one grade, exceedes the most bull wheel side absorbability of chassis dynamometer when one grade of wheel back gauge power is excessive When, then tested using more high tap position；S4, according to the data recorded in step S3 data analysis and comparison are carried out, and judge whether the grade climbing performance of vehicle is full Sufficient design requirement.
- The method of testing 2. automobile as claimed in claim 1 is climbed, it is characterised in that in S1 test vehicle preparation process, Including：Road Coast-down check on the spot is carried out to test vehicle, to obtain real road resistance of taxing equation, on chassis dynamometer Establish road analogy pattern.
- The method of testing 3. automobile as claimed in claim 1 is climbed, it is characterised in that after step S30, in addition to step S40, Carry out uphill starting experiment.
- The method of testing 4. automobile as claimed in claim 1 is climbed, it is characterised in that in S2 preheating step, including：Set Chassis dynamometer is under road analogy pattern, and using vehicle traction rotary drum forward direction test model, the adjustment gradient is to test vehicle Transmission system is loaded, and the engine and transmission system for making test vehicle reach normal working temperature.
- The method of testing 5. automobile as claimed in claim 4 is climbed, it is characterised in that carried out using performance curve to test vehicle Preheating.
- The method of testing 6. automobile as claimed in claim 1 is climbed, it is characterised in that after the completion of to test vehicle preheating, if Chassis dynamometer is put under the anti-drag mode formula of constant speed, in preset speed, test vehicle is dragged with rotary drum is counter, if the resistance of driver Power is without significant change, then explanation preheating is abundant, the step of can carrying out road coasting test；Otherwise continue to carry out test vehicle Preheating.
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| CN109696312A (en) * | 2018-12-20 | 2019-04-30 | 潍柴动力股份有限公司 | Test device and test method for vehicle hill climbing test |
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