CN108152742B - A kind of vehicle generator efficiency test method - Google Patents
A kind of vehicle generator efficiency test method Download PDFInfo
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- CN108152742B CN108152742B CN201810230517.8A CN201810230517A CN108152742B CN 108152742 B CN108152742 B CN 108152742B CN 201810230517 A CN201810230517 A CN 201810230517A CN 108152742 B CN108152742 B CN 108152742B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/26—Devices for measuring efficiency, i.e. the ratio of power output to power input
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Abstract
The invention discloses a kind of vehicle generator efficiency test methods, wherein the following steps are included: setting room temperature vehicle environment for test environment；Under the circumstances as described, under the conditions of different power loads, wheel power, the generated output power of vehicle are measured；Measure the drive line efficiency of the vehicle；Calculate the efficiency of the generator.The present invention can accurately measure the efficiency of vehicle generator.
Description
Technical field
The present invention relates to vehicle the field of test technology, especially a kind of vehicle generator efficiency test method.
Background technique
Electric generators for automobile can be divided into dc generator and alternating current generator, since alternating current generator is better than in many aspects
Dc generator, current all automobiles are all made of alternating current generator.Automobile current generator is the main power source of automobile, effect be
When normal working of engine, Xiang Suoyou power supply for electrical equipment, while to storage battery power supply.As automotive electronic technology is total with automobile
The continuous development of line technology also gets over the performance requirement of automobile power system generator so that vehicle power consumption of electrical appliances is increasing
Come higher.In vehicle normal driving process, if high-power electric appliance is opened, vehicle increases with electrical power consumed, therewith generator
Output power also increases, if the output power of generator is lower than vehicle power load general power, electric power storage tank discharge, vehicle is electrical
The voltage of system reduces, and may cause certain power load cisco unity malfunctions, influences the safety of entire vehicle electrical system.Cause
This, the test for vehicle environmental electrical generator efficiency, the performance for verifying generator has important practical significance.
The research of mobile generator efficiency test is mainly carried out on test-bed at present, commonly uses test mobile generator
The method of efficiency includes: to dragging method, Indirect Determination and calorimetry.
To the input power and output power for dragging method to monitor tested generator, tested generator efficiency is determined.Indirect determination
Method determines tested generator efficiency by measurement output power and dissipation power.Calorimetry is turned by measurement motor internal loss
The heat in cooling medium is shifted to, calculates generator efficiency by total losses.
The studies above method is based on test-bed and tests generator efficiency, does not account for during vehicle actual travel,
Contacting for generator and engine, generator and electrical appliance and generator and battery, lacks directive significance.The prior art pair
Mobile generator efficiency test has following defect:
(1) it to dragging method computational accuracy low, is affected by environment temperature；Indirect Determination measuring accuracy is higher, but right
The required precision for monitoring hardware is higher；The transmitting of its disadvantage heat of calorimetry has retardance, influences the accuracy of efficiencies.
(2) prior art is based on engine bench test generator efficiency, does not consider influence of the vehicle environment to generator efficiency.
The efficiency for how accurately detecting generator is this field one of major issue urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of vehicle generator efficiency test methods, to solve deficiency in the prior art,
It can accurately measure the efficiency of vehicle generator.
The present invention provides a kind of vehicle generator efficiency test methods, wherein the following steps are included:
Room temperature vehicle environment is set by test environment；
Under the circumstances as described, under the conditions of different power loads, the output power and the vehicle of the generator are calculated
Wheel power；
Obtain the drive line efficiency of vehicle；
According to the output power of the generator, the wheel power and the drive line efficiency of the vehicle, institute is calculated
State the efficiency of generator.
Vehicle generator efficiency test method as described above, wherein preferably, calculate the output work of the generator
The wheel power of rate and the vehicle the following steps are included:
The vehicle is placed on revolving drum test table；
Rotating hub is rotated with the speed of setting；
Disconnect the engine oil spout insurance of the vehicle；
Starting engine is simultaneously linked into II grades；
The speed of rotating hub is promoted to setting speed；
Under conditions of being not turned on power load, measure the first output voltage of the generator, the generator
One output electric current, the first rotating hub power and the first speed；
The first output power of the generator is calculated according to first output voltage and the first output electric current；
The first wheel power of the vehicle is calculated according to the first rotating hub power and first speed；
It is opened or the condition that is all turned in power load part, measures the second output voltage, described of the generator
The second output electric current, the second rotating hub power and the second speed of generator；
Second output power of generator is calculated according to second output voltage and the second output electric current；
The second wheel power of the vehicle is calculated according to the second rotating hub power and second speed.
Vehicle generator efficiency test method as described above, wherein preferably, rotating hub is being rotated with the speed of setting
While, it charges to the battery of the vehicle.
Vehicle generator efficiency test method as described above, wherein preferably, with the speed rotation rotating hub of setting
Time is no less than 40min.
Vehicle generator efficiency test method as described above, wherein preferably, the efficiency calculation of the generator is public
Formula is as follows:
Wherein, α is the efficiency of generator, and β is drive line efficiency, PF1For the first output power of generator, PF2For generator
Second output power, PL1For the first wheel power；PL2For the second wheel power.
Vehicle generator efficiency test method as described above, wherein preferably, measure the output work of the generator
The wheel power of rate and the vehicle the following steps are included:
The vehicle is placed on revolving drum test table；
Rotating hub is rotated with the speed of setting；
The parameter of revolving drum test table is set, starts engine, speed is promoted to preset vehicle speed in the state of full throttle；
Under conditions of being not turned on power load, measure the third output voltage of the generator, the generator
Three output electric currents, third rotating hub power and third speed；
The third output power of the generator is calculated according to the third output voltage and third output electric current；
The third wheel power of the vehicle is calculated according to the third rotating hub power and third speed；
Under conditions of being all turned on load or part is opened, the 4th output voltage, described of the generator is measured
The 4th output electric current, the 4th rotating hub power and the 4th speed of generator；
The 4th output power of the generator is calculated according to the 4th output voltage and the 4th output electric current；
Fourth round side power is calculated according to the 4th rotating hub power and the 4th speed.
Vehicle generator efficiency test method as described above, wherein preferably, the preset vehicle speed is 80Km/h.
Vehicle generator efficiency test method as described above, wherein preferably, by speed in the state of full throttle
When being promoted to preset vehicle speed, the gear of engine is II grades.
Compared with prior art, the present invention is by passing through the wheel power and generator of measurement vehicle under vehicle environment
Output power, to calculate the generator efficiency of vehicle.Carried out under vehicle environment due to entirely detecting, can be avoided due to
The problem of test result inaccuracy caused by the difference of application environment.Meanwhile introducing the drive line efficiency of vehicle, Neng Gouzhun
Really calculate the efficiency of generator.
Detailed description of the invention
Fig. 1 is step flow chart of the invention；
Fig. 2 is the step flow chart of resistance moments method test；
The schematic diagram of revolving drum test table when Fig. 3 is test；
Fig. 4 is the step flow chart of external characteristics method test；
Engine output transfer route figure when Fig. 5 is the test of external characteristics method.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, for explaining only the invention, and cannot be construed to
Limitation of the present invention.
Fig. 1 is please referred to, Fig. 1 is step flow chart of the invention；The specific embodiment of the invention proposes a kind of vehicle hair
Electric efficiency test method, wherein the following steps are included:
Test environment is set room temperature vehicle environment by S1；Specifically, temperature setting be 25 DEG C, under vehicle environment into
Row test；
S2, under the environment described in step S1, under the conditions of different power loads, calculate the generator output power and
The wheel power of the vehicle；Specifically, the wheel power of the vehicle can be tested by rotating hub and be measured, and can specifically pass through measurement
Rotating hub power and speed obtain, and the output power of the generator can be calculated by its output voltage and output electric current.
S3 obtains the drive line efficiency of vehicle；Specifically, the drive line efficiency of the vehicle can be by vehicle transmission efficiency
Experiment obtains.
S4 is calculated according to the output power of the generator, the wheel power and the drive line efficiency of the vehicle
The efficiency of the generator.Specifically, it is set as room temperature vehicle environment by the way that environment will be tested, is measured under vehicle environment, energy
Enough test errors eliminated due to use environment different band are conducive to improve measuring accuracy, meanwhile, drive line efficiency is introduced,
The accuracy of test can be further increased.
When it is implemented, for the wheel power of the vehicle test method there are mainly two types of, one is resistance moments method,
Another kind is external characteristics method；
As a preferred method, referring to figure 2., Fig. 2 is the step flow chart of resistance moments method test；With resistance moments method into
When row test, the vehicle generated output power for needing to detect includes the first output power, the second output power；The vehicle
Wheel power includes the first wheel power and the second wheel power；It mainly include following when being tested using resistance moments method
Step:
The vehicle is placed on revolving drum test table by S201；Specifically, referring to figure 3., rotating hub examination when Fig. 3 is test
Test the schematic diagram of platform；It is tested by power of the revolving drum test table to vehicle.When it is implemented, in order to detect to generate electricity simultaneously
Machine output power needs to arrange voltage sensor and current sensor, and specifically, voltage sensor is for testing the defeated of generator
Voltage out, and current sensor is used to test the output electric current of generator.
S202, rotates rotating hub with the speed of setting, carries out hot vehicle to the vehicle；When it is implemented, revolving drum test table
Speed is 80km/h, and the hot vehicle time is no less than 40min.Specifically, while carrying out hot vehicle to the vehicle, to the vehicle
Battery charge.Specifically, during hot vehicle, the battery of vehicle is full of or until charging current is less than 1A.
S203 disconnects the engine oil spout insurance of the vehicle；In this way, guaranteeing that engine does not spray during the test
Oil, that is, engine is made to be in the state driven by rotating hub.It so, it is possible to calculate engine by the output power of rotating hub
Power.
S204 starts engine and is linked into II grades；At this point, vehicle key is placed in ON grades, by the hair for pulling out the vehicle
Motivation oil spout insurance, can either guarantee that engine does not generate power, and can guarantee that the power load on vehicle is at just
Normal state.
The speed of rotating hub is promoted to setting speed by S205；
S206 measures the first output voltage U of the generator under conditions of being not turned on power load1, the power generation
First output electric current I of machine1, the first rotating hub power Fdyno1With the first vehicle velocity V1；Then, under conditions of being not turned on power load, energy
Enough obtain the first output power and the first wheel power of generator.
S207 calculates the first output work of the generator according to first output voltage and the first output electric current
Rate；The first wheel power of the vehicle is calculated according to the first rotating hub power and first speed；When it is implemented, described
The calculation formula of first output power and first wheel power is as follows:
PF1=U1×I1
PL1=Fdyno1×V1
Wherein, PF1For the first output power of generator under conditions of being not turned on power load, PL1To be not turned on
The first wheel power under conditions of power load.
S208 measures the second output voltage of the generator in the condition that power load part is opened or is all turned on
U2With the second output electric current I2And the second rotating hub power F of the vehicledyno1With the second vehicle velocity V2.In this way, in part unlatching or entirely
Under conditions of power load is opened in portion, the second output power of generator and the second wheel power of the vehicle can be derived that.
When it is implemented, when step S206 and step S208 are also possible to measure under conditions of power load is opened in part twice,
If part is opened twice, then require the power of the power load of the unlatching twice different.
S209 calculates second output work of generator according to second output voltage and the second output electric current
Rate；The second wheel power of the vehicle is calculated according to the second rotating hub power and second speed；When it is implemented, described
The calculation formula of two output powers and second wheel power is as follows:
PF2=U2×I2
PL2=Fdyno2×V2
Further, due to:
Wherein, PF2For the second output power of generator, PL2For the second wheel power.P1 start inAnd P2 start inIt is engine
Power caused by internal resistance, the two are equal in magnitude.
Specifically, the working efficiency calculation formula of the generator are as follows:
Wherein, α is the efficiency of generator, and β is drive line efficiency.
In this way, the second wheel power and the first wheel power by that will measure twice make poor, will measure twice first
It is poor that output power and the second output power are made, and can eliminate due to engine internal resistance bring test error.It so, it is possible effectively
Improve the accuracy of generator efficiency test.
As another preferred embodiment, referring to figure 4., Fig. 4 is the step flow chart of external characteristics method test；Use external characteristics
When method measures, the generated output power for needing to measure includes third output power and the 4th output power,
When being measured using external characteristics method, the output power of the wheel power and generator that measure the vehicle includes
Following steps:
The vehicle is placed on revolving drum test table by S201'；Specifically, referring to figure 3., rotating hub examination when Fig. 3 is test
Test the schematic diagram of platform；Due to being tested on vehicle, need through revolving drum test table to the third wheel power of vehicle and
Four wheel powers are tested.It also needs to arrange the electricity for detecting generator third output voltage and the 4th output voltage simultaneously
The current sensor of pressure sensor and third output electric current and the 4th output electric current for detecting generator.
S202', rotates rotating hub with the speed of setting, carries out hot vehicle to the vehicle；The hot vehicle time is no less than 40min, and
Charge while hot vehicle to battery, until battery be full of or charging current be less than 1A.
S203', is arranged the parameter of revolving drum test table, starts engine, is promoted to speed in the state of full throttle pre-
If speed；At this point, vehicle key is in the position ON, engine gears are linked into II grades, promote speed under full throttle state
To preset vehicle speed.Specifically, preset vehicle speed 80km/h.In the process, engine is in normal operating conditions, and engine is logical
It crosses wheel and drives rotating hub rotation.
S204' measures generator output tertiary voltage U' under conditions of being not turned on power load1, generator third
Export electric current I'1, third rotating hub power F'dyno1With third vehicle velocity V '1；When it is implemented, all power loads is kept to be in pass
Closed state keeps generator to be in minimum stable output state, and guarantees that stable operation for a period of time, is then surveyed under the speed
Measure the third output voltage U' of generator1, generator third export electric current I'1, third rotating hub power F'dyno1With third vehicle velocity V
'1。
S205' is exported according to the third that the third output voltage and third output electric current calculate the generator
Power；The third wheel power of the vehicle is calculated according to the third rotating hub power and third speed；Wherein, third output power
It is as follows with the calculation formula of third wheel power:
P′F1=U '1×I′1
P′1 wheel=F 'dyno1×V′1
Wherein, P 'F1For the third output power of generator, P 'L1For third wheel power.
S206' measures generator output voltage U' under conditions of being all turned on load or part is opened2, generator
The 4th output electric current I'2, the 4th rotating hub power F'dyno2With the 4th vehicle velocity V '2.When it is implemented, in step S204' and step
In S206', measuring condition is only different in the power load power of unlatching twice, can also specifically be separately turned on different capacity twice
Power load.
S207' calculates the 4th output of the generator according to the 4th output voltage and the 4th output electric current
Power；Fourth round side power is calculated according to the 4th rotating hub power and the 4th speed.Wherein, the 4th output power with it is described
The calculation formula of fourth round side power is as follows:
P′F2=U '2×I′2
P’L2=F 'dyno2×V’2
Wherein, P 'F2For the 4th output power, P'L2For fourth round side power.
Calculate the efficiency of the generator.Referring to figure 5., engine output when Fig. 5 is the test of external characteristics method
Transfer route figure.It can be concluded that
Wherein, P '1 engineFor the maximum power of the engine when power load is not turned on, P '2 enginesFor in power load portion
The maximum power of engine when separately opening or be all turned on.The P ' obtained in outer characteristic test2 enginesWith P '1 engineIt is equal.Cause
This,
The calculation formula of the efficiency of the generator are as follows:
Wherein, α ' is the efficiency of the generator, and β ' is the transmission efficiency of vehicle power train.
When calculating, by the way that third wheel power, the will be measured respectively in the case where opening the power load of different capacity
Four wheel powers, third output power and the 4th output power, and by the third wheel power measured twice and fourth round side function
It is poor that rate is made, will measure twice third output power and the 4th output power make it is poor after；Two differences will be found out to be divided by, and divided by whole
The transmission efficiency of vehicle power train.It so, it is possible to eliminate the power consumed by engine interior resistance, be conducive to improve and survey
The accuracy of examination.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention
Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (7)
1. a kind of vehicle generator efficiency test method, which comprises the following steps:
Room temperature vehicle environment is set by test environment；
Under the circumstances as described, under the conditions of different power loads, the output power of the generator and the wheel of the vehicle are calculated
Side power；
Obtain the drive line efficiency of vehicle；
According to the output power of the generator, the wheel power and the drive line efficiency of the vehicle, the hair is calculated
The efficiency of motor；
Calculate the output power of the generator and the wheel power of the vehicle the following steps are included:
The vehicle is placed on revolving drum test table；
Rotating hub is rotated with the speed of setting；
Disconnect the engine oil spout insurance of the vehicle；
Starting engine is simultaneously linked into II grades；
The speed of rotating hub is promoted to setting speed；
Under conditions of being not turned on power load, measure the first output voltage of the generator, the generator it is first defeated
Electric current, the first rotating hub power and the first speed out；
The first output power of the generator is calculated according to first output voltage and the first output electric current；According to institute
It states the first rotating hub power and first speed calculates the first wheel power of the vehicle；
It is opened or the condition that is all turned in power load part, measures the second output voltage of the generator, the power generation
The second output electric current, the second rotating hub power and the second speed of machine；
Second output power of generator is calculated according to second output voltage and the second output electric current；According to described
Second rotating hub power and second speed calculate the second wheel power of the vehicle.
2. vehicle generator efficiency test method according to claim 1, which is characterized in that in the speed rotation with setting
While rotating hub, charge to the battery of the vehicle.
3. vehicle generator efficiency test method according to claim 1, which is characterized in that turned with the speed rotation of setting
The time of hub is no less than 40min.
4. vehicle generator efficiency test method according to claim 1, which is characterized in that the efficiency meter of the generator
It is as follows to calculate formula:
Wherein, α is the efficiency of generator, and β is drive line efficiency, PF1For the first output power of generator, PF2For generator second
Output power, PL1For the first wheel power；PL2For the second wheel power.
5. vehicle generator efficiency test method according to claim 1, which is characterized in that measure the defeated of the generator
Out the wheel power of power and the vehicle the following steps are included:
The vehicle is placed on revolving drum test table；
Rotating hub is rotated with the speed of setting；
The parameter of revolving drum test table is set, starts engine, speed is promoted to preset vehicle speed in the state of full throttle；
Under conditions of being not turned on power load, third output voltage, the third of the generator for measuring the generator are defeated
Electric current, third rotating hub power and third speed out；
The third output power of the generator is calculated according to the third output voltage and third output electric current；According to institute
It states third rotating hub power and third speed calculates the third wheel power of the vehicle；
Under conditions of being all turned on load or part is opened, the 4th output voltage of the generator, the power generation are measured
The 4th output electric current, the 4th rotating hub power and the 4th speed of machine；
The 4th output power of the generator is calculated according to the 4th output voltage and the 4th output electric current；According to institute
It states the 4th rotating hub power and the 4th speed calculates fourth round side power.
6. vehicle generator efficiency test method according to claim 5, which is characterized in that the preset vehicle speed is
80Km/h。
7. vehicle generator efficiency test method according to claim 6, which is characterized in that will in the state of full throttle
When speed is promoted to preset vehicle speed, the gear of engine is II grades.
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| CN109470470B (en) * | 2018-11-09 | 2020-04-28 | 安徽江淮汽车集团股份有限公司 | System and method for testing mechanical efficiency of gearbox on whole vehicle |
| CN111458641B (en) * | 2020-05-14 | 2020-12-18 | 中国水利水电科学研究院 | Hydropower station generator efficiency optimization test method based on calorimetry |
| CN111624500B (en) * | 2020-07-10 | 2023-06-27 | 深圳市道通科技股份有限公司 | Method for detecting vehicle generator and battery detector |
| CN112461420B (en) * | 2020-11-23 | 2022-08-30 | 北京纳米能源与系统研究所 | Method and device for detecting energy conversion efficiency of rotary generator and controller |
| US12012089B2 (en) | 2021-09-23 | 2024-06-18 | Ford Global Technologies, Llc | Auxiliary device power testing for vehicle power delivery |
| CN115219896A (en) * | 2022-07-15 | 2022-10-21 | 哈尔滨东安汽车动力股份有限公司 | Test method for testing efficiency of whole vehicle generator by using rotary drum test bed |
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| JP3917080B2 (en) * | 2002-03-08 | 2007-05-23 | 三菱電機株式会社 | Motor abnormality detection device |
| CN101546352B (en) * | 2009-04-10 | 2011-07-06 | 清华大学 | Type selection method for auxiliary power units of series-type hybrid vehicles |
| CN102692289B (en) * | 2012-06-25 | 2014-03-19 | 安徽安凯汽车股份有限公司 | Test method for measuring efficiency of electric driving system of novel-energy automobile |
| CN106183833A (en) * | 2016-07-07 | 2016-12-07 | 中国第汽车股份有限公司 | Electric vehicle brake power response rate evaluation method |
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