CN108152742A - A kind of vehicle generator efficiency test method - Google Patents
A kind of vehicle generator efficiency test method Download PDFInfo
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- CN108152742A CN108152742A CN201810230517.8A CN201810230517A CN108152742A CN 108152742 A CN108152742 A CN 108152742A CN 201810230517 A CN201810230517 A CN 201810230517A CN 108152742 A CN108152742 A CN 108152742A
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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 method, wherein, include the following steps：Test environment is set as room temperature vehicle environment；Under the circumstances as described, under different electricity consumption loading conditions, 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 technical field of measurement and test, particularly a kind of vehicle generator efficiency test method.
Background technology
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 use alternating current generator.Automobile current generator is the main power source of automobile, effect be
During normal working of engine, to all 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 so that vehicle power consumption of electrical appliances is increasing, is also got over to the performance requirement of automobile power system generator
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 less than vehicle electricity consumption load general power, battery discharging, vehicle is electrical
The voltage of system reduces, and may cause certain electric loading cisco unity malfunctions, influence the safety of entire automobile electric system.Cause
This, the test for vehicle environmental electrical generator efficiency verifies that the performance of generator has important practical significance.
The research of mobile generator efficiency test mainly on test-bed is carried out at present, commonly uses test mobile generator
The method of efficiency includes：To dragging method, Indirect Determination and calorimetry.
To dragging the input power and output power of the tested generator of method monitoring, tested generator efficiency is determined.Indirect determination
Method determines tested generator efficiency by measuring output power and dissipation power.Calorimetry is turned by measurement motor internal loss
The heat in cooling medium is shifted to, generator efficiency is calculated 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 accumulator, 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 transmission of its shortcoming 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 of generator how is accurately detected, is one of this field major issue urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of vehicle generator efficiency test method, to solve deficiency of the prior art,
It can accurately measure the efficiency of vehicle generator.
The present invention provides a kind of vehicle generator efficiency test method, wherein, include the following steps：
Test environment is set as room temperature vehicle environment；
Under the circumstances as described, under different electricity consumption loading conditions, the output power of the generator and the vehicle are calculated
Wheel power；
Obtain the drive line efficiency of vehicle；
According to the output power of the generator, the wheel power of the vehicle and the drive line efficiency, institute is calculated
State the efficiency of generator.
Vehicle generator efficiency test method as described above, these, it is preferred to, calculate the output work of the generator
The wheel power of rate and the vehicle includes the following steps：
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；
Start engine and be linked into II grades；
The speed of rotating hub is promoted to setting speed；
It is being not turned on under conditions of electric loading, measuring the of the first output voltage of the generator, the generator
One output 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 first output 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 electricity consumption loading section, measures the second output voltage, described of the generator
Second output current of generator, the second rotating hub power and the second speed；
Second output power of generator is calculated according to second output voltage and second output 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, these, it is preferred to, rotating hub is being rotated with the speed of setting
While, it charges to the accumulator of the vehicle.
Vehicle generator efficiency test method as described above, these, it is preferred to, with the speed rotation rotating hub of setting
Time is no less than 40min.
Vehicle generator efficiency test method as described above, these, it is preferred to, 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, these, it is preferred to, measure the output work of the generator
The wheel power of rate and the vehicle includes the following steps：
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；
It is being not turned on under conditions of electric loading, measuring the of the third output voltage of the generator, the generator
Three output currents, third rotating hub power and third speed；
The third output power of the generator is calculated according to the third output voltage and the third output 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 opens, the 4th output voltage, described of the generator is measured
The 4th output 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 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, these, it is preferred to, the preset vehicle speed is 80Km/h.
Vehicle generator efficiency test method as described above, these, it is preferred to, 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 under vehicle environment, by the wheel power and generator that measure vehicle
Output power, so as to calculate the generator efficiency of vehicle.Carried out under vehicle environment due to entirely detecting, can avoid due to
The problem of test result is inaccurate caused by the difference of application environment.Meanwhile introduce the drive line efficiency of vehicle, Neng Gouzhun
Really calculate the efficiency of generator.
Description of the drawings
Fig. 1 is the step flow chart of the present 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, is only used for explaining the present invention, and cannot be construed to
Limitation of the present invention.
Fig. 1 is please referred to, Fig. 1 is the step flow chart of the present invention；The specific embodiment of the invention proposes a kind of vehicle hair
Electric efficiency test method, wherein, include the following steps：
Test environment is set as room temperature vehicle environment by S1；Specifically, temperature setting be 25 DEG C, under vehicle environment into
Row test；
S2, under environment described in step S1, under different electricity consumption loading conditions, 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 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 according to the output power of the generator, the wheel power of the vehicle and the drive line efficiency, is calculated
The efficiency of the generator.Specifically, it by the way that test environment is set as room temperature vehicle environment, is measured under vehicle environment, energy
Enough test errors eliminated due to the use of environment different band are conducive to improve measuring accuracy, meanwhile, drive line efficiency is introduced,
The accuracy of test can be further improved.
When it is implemented, for the wheel power of the vehicle test method there are mainly two types of, one kind is resistance moments method,
Another kind is external characteristics method；
As a kind of preferred embodiment, Fig. 2 is please referred to, Fig. 2 is the step flow chart of resistance moments method test；With resistance moments method into
During row test, the vehicle generated output power detected is needed to include the first output power, the second output power；The vehicle
Wheel power includes the first wheel power and the second wheel power；When resistance moments method is used to be tested, mainly including following
Step：
The vehicle is placed on revolving drum test table by S201；Specifically, Fig. 3 is please referred to, rotating hub examination when Fig. 3 is test
Test the schematic diagram of platform；The power of vehicle is tested by revolving drum test table.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 used to test the defeated of generator
Go out voltage, and current sensor is used to test the output current of generator.
S202, rotating hub is rotated with the speed of setting, and hot vehicle is carried out 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 hot vehicle is carried out to the vehicle, to the vehicle
Accumulator charge.Specifically, during hot vehicle, the accumulator 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, ensure that during test, engine does not spray
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 is insured, and can either ensure that engine does not generate power, and can ensure to be at just with electric loading on vehicle
Normal state.
The speed of rotating hub is promoted to setting speed by S205；
S206 under conditions of being not turned on electric loading, measures the first output voltage U of the generator1, the power generation
First output current I of machine1, the first rotating hub power Fdyno1With the first vehicle velocity V1；Then, under conditions of being not turned on electric loading, 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 first output current
Rate；The first wheel power of the vehicle is calculated according to the first rotating hub power and first speed；It is 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 the generator under conditions of being not turned on electric loading, PL1To be not turned on
With the first wheel power under conditions of electric loading.
S208 in the condition that electricity consumption loading section is opened or is all turned on, measures the second output voltage of the generator
U2With the second output 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 portion's unlatching electric loading, the second output power of generator and the second wheel power of the vehicle can be derived that.
When it is implemented, step S206 and step S208 can also be when measuring under conditions of part unlatching electric loading twice,
If part is opened twice, then the power with electric loading for requiring the unlatching twice is different.
S209 calculates second output work of generator according to second output voltage and second output current
Rate；The second wheel power of the vehicle is calculated according to the second rotating hub power and second speed；It is 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 is：
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 the test error brought due to engine internal resistance.It so, it is possible effectively
Improve the accuracy of generator efficiency test.
As another preferred embodiment, Fig. 4 is please referred to, Fig. 4 is the step flow chart of external characteristics method test；Use external characteristics
When method measures, the generated output power measured is needed to include third output power and the 4th output power,
When external characteristics method is used to measure, the output power of wheel power and generator for measuring the vehicle includes
Following steps：
The vehicle is placed on revolving drum test table by S201'；Specifically, Fig. 3 is please referred to, 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
Pressure sensor and the current sensor for detecting the third output current of generator and the 4th output current.
S202', rotating hub is rotated with the speed of setting, and hot vehicle is carried out to the vehicle；The hot vehicle time is no less than 40min, and
Charge while hot vehicle to accumulator, until accumulator be full of or charging current be less than 1A.
S203', sets 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 ON positions, 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 leads to
It crosses wheel and drives rotating hub rotation.
S204' under conditions of being not turned on electric loading, measures generator output tertiary voltage U'1, generator third
Output current I'1, third rotating hub power F'dyno1With third vehicle velocity V '1；It is in closing with electric loading when it is implemented, keeping all
Closed state keeps generator to be in minimum stable output state, and ensure that stable operation for a period of time, is then surveyed under the speed
Measure the third output voltage U' of generator1, generator third output current I'1, third rotating hub power F'dyno1With third vehicle velocity V
'1。
S205', the third that the generator is calculated according to the third output voltage and the third output current export
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' under conditions of being all turned on load or partly being opened, measures generator output voltage U'2, generator
The 4th output 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 can also specifically be separately turned on different capacity twice only in the use electrical load power of unlatching difference twice
Use electric loading.
S207' calculates the 4th output of the generator according to the 4th output voltage and the 4th output 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.Please refer to Fig. 5, engine output when Fig. 5 is the test of external characteristics method
Transfer route figure.It can obtain,
Wherein, P '1 engineFor the maximum power of the engine when being not turned on electric loading, P '2 enginesFor in electricity consumption 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 is：
Wherein, α ' is the efficiency of the generator, and β ' is the transmission efficiency of vehicle power train.
During calculating, by by open different capacity with electric loading in the case of measure third wheel power, the respectively
Four wheel powers, third output power and the 4th output power, and by the third wheel power measured twice and fourth round side work(
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 obtained 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.
The structure, feature and effect of the present invention, more than 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 is not to limit practical range shown in drawing, it is every according to structure of the invention
Want made change or be revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (8)
1. a kind of vehicle generator efficiency test method, which is characterized in that include the following steps：
Test environment is set as room temperature vehicle environment；
Under the circumstances as described, under different electricity consumption loading conditions, 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 of the vehicle and the drive line efficiency, the hair is calculated
The efficiency of motor.
2. vehicle generator efficiency test method according to claim 1, which is characterized in that calculate the defeated of the generator
The wheel power for going out power and the vehicle includes the following steps：
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；
Start engine and be linked into II grades；
The speed of rotating hub is promoted to setting speed；
It is being not turned on under conditions of electric loading, measure the first output voltage of the generator, the generator first defeated
Go out 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 first output current；According to institute
It states the first rotating hub power and first speed calculates the first wheel power of the vehicle；
In the condition that electricity consumption loading section is opened or is all turned on, the second output voltage of the generator, the power generation are measured
Second output current of machine, the second rotating hub power and the second speed；
Second output power of generator is calculated according to second output voltage and second output current；According to described
Second rotating hub power and second speed calculate the second wheel power of the vehicle.
3. vehicle generator efficiency test method according to claim 2, which is characterized in that in the speed rotation with setting
While rotating hub, charge to the accumulator of the vehicle.
4. vehicle generator efficiency test method according to claim 2, which is characterized in that turned with the speed rotation of setting
The time of hub is no less than 40min.
5. vehicle generator efficiency test method according to claim 2, 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.
6. vehicle generator efficiency test method according to claim 1, which is characterized in that measure the defeated of the generator
The wheel power for going out power and the vehicle includes the following steps：
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 electric loading, third output voltage, the third of the generator for measuring the generator are defeated
Go out electric current, third rotating hub power and third speed；
The third output power of the generator is calculated according to the third output voltage and the third output 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 partly being opened, the 4th output voltage of the generator, the power generation are measured
The 4th output 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 current；According to institute
It states the 4th rotating hub power and the 4th speed calculates fourth round side power.
7. vehicle generator efficiency test method according to claim 6, which is characterized in that the preset vehicle speed is
80Km/h。
8. vehicle generator efficiency test method according to claim 7, 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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| CN111458641A (en) * | 2020-05-14 | 2020-07-28 | 中国水利水电科学研究院 | Hydropower station generator efficiency optimization test method based on calorimetry |
| CN112461420A (en) * | 2020-11-23 | 2021-03-09 | 北京纳米能源与***研究所 | Method and device for detecting energy conversion efficiency of rotary generator and controller |
| WO2022007710A1 (en) * | 2020-07-10 | 2022-01-13 | 深圳市道通科技股份有限公司 | Method for testing generator of vehicle, and battery tester |
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| US12012089B2 (en) | 2021-09-23 | 2024-06-18 | Ford Global Technologies, Llc | Auxiliary device power testing for vehicle power delivery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470470A (en) * | 2018-11-09 | 2019-03-15 | 安徽江淮汽车集团股份有限公司 | One kind carrying out gearbox mechanical efficiency test macro and test method on vehicle |
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| CN112461420B (en) * | 2020-11-23 | 2022-08-30 | 北京纳米能源与***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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