CN109946005A - The methods, devices and systems of power detection - Google Patents
The methods, devices and systems of power detection Download PDFInfo
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- CN109946005A CN109946005A CN201711391878.2A CN201711391878A CN109946005A CN 109946005 A CN109946005 A CN 109946005A CN 201711391878 A CN201711391878 A CN 201711391878A CN 109946005 A CN109946005 A CN 109946005A
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Abstract
The invention discloses a kind of methods, devices and systems of power detection.Wherein, this method comprises: when automobile is on rotary drum platform, rotary drum in the first power and corresponding rotary drum platform of in pre-set velocity interval engine input gearbox is obtained respectively and is exported to the second power of automobile；According to the first power and the second power, the transmitting wasted power of system is obtained；According to the test condition of preset each transmission parts in automobile, the transmitting wasted power of each transmission parts is calculated according to the transmitting wasted power of system respectively.The present invention solves the low technical problem of the transmitting of the transmission system due to the prior art on wheel wasted power measurement accuracy.
Description
Technical field
The present invention relates to automotive engineering application fields, a kind of method, apparatus in particular to power detection and are
System.
Background technique
In order to meet increasingly strict fuel economy regulation demand, each main engine plants take the oil of different measure reduction vehicles respectively
Consumption, in order to reach the target for reducing oil consumption, the energy on the one hand needing to improve power source turns to close efficiency, for example internal combustion engine needs mention
The thermal efficiency of high engine, motor need to improve electric energy to the transformation efficiency of mechanical energy；On the other hand need to improve vehicle biography
The transmission efficiency of dynamic system, reduces the transmitting wasted power of each transmission parts, car transmissions be located at car power source and
The actuating unit between wheel is driven, basic function is to carry out power transmitting.Traditional combustion engine formula car transmissions
It mainly include fluid torque-converter or clutch, transmission, main reducing gear, transmission shaft, 4 wheel driven torque distribution device, differential mechanism and half
The components such as axis, brake disc, tire, electric car are not usually required to speed changer, but still need the devices such as transmission shaft, vehicle transmission
The height of drive system efficiency can reflect the comprehensive performance of car transmissions, including its design level and manufacture level etc.,
But also it can reflect the size of the power loss inside car transmissions.In the process of optimization transmission system transmission efficiency
In, it needs to test in transmitting wasted power of each development phase to transmission system, according to each transmission system working characteristics
Difference, the sensitivity that each component of transmission system transmitting wasted power changes environmental variance and working condition is not quite similar, such as
How fast and accurately to carry out the test of transmission system transmitting wasted power is the key job of system optimization.
Prior art measures the transmission efficiency or transmitting lost work of each components by the bench test of each components
Each component of transmission system is mounted on testing stand specifically by fixture, one end is connect with driving motor, as input by rate
Power source installs torque sensor in each components junction, by the revolving speed and torque of control input motor, with torque sensing
The torque of device compares, and obtains the transmission efficiency of each transmission system components, to obtain the biography of each components of transmission system
Wasted power is passed, on the one hand this measurement method needs dedicated rack, time-consuming and laborious, working efficiency and higher cost, another party
Face, the bench test state of components and the state being mounted on vehicle are not the same, cause the result of measurement that cannot represent reality
Border is installed to the transmitting loss of the transmission system on vehicle.
For the low problem of the above-mentioned transmission system transmitting wasted power measurement accuracy due to the prior art on vehicle, mesh
It is preceding not yet to put forward effective solutions.
Summary of the invention
The embodiment of the invention provides a kind of methods, devices and systems of power detection, at least to solve due to existing skill
The low technical problem of transmission system transmitting wasted power measurement accuracy of the art on wheel.
According to an aspect of an embodiment of the present invention, a kind of method of power detection is provided, comprising: when automobile is in rotary drum
When on platform, it is flat that the first power of engine input gearbox and corresponding rotary drum in pre-set velocity interval are obtained respectively
Rotary drum is exported to the second power of automobile in platform；According to the first power and the second power, the transmitting wasted power of system is obtained；According to
According to the test condition of each transmission parts preset in automobile, each transmission parts are calculated according to the transmitting wasted power of system respectively
Transmit wasted power.
Optionally, the first power for obtaining the engine input gearbox in pre-set velocity interval includes: to set gearbox
In D grades of traveling, predetermined torque is inputted in rotary drum, gearbox input torque is obtained by controller local area network's CAN signal and is turned
The first power is calculated in speed.
Optionally, the test condition according to preset each transmission parts in automobile, respectively according to the transmitting lost work of system
Rate calculate each transmission parts transmitting wasted power include: gearbox output end disconnect transmission shaft, engine misses, starting
In the case where rotary drum, being rotated by rotary drum band motor car wheel, wheel drives semiaxis, differential mechanism and transmission shaft to rotate, and by adjusting
The power and revolving speed of rotary drum obtain the revolving speed that each speed point in pre-set velocity interval corresponds to rotary drum input in pre-set velocity interval
With the third power of torque, wherein third power is the transmitting wasted power of transmission shaft, differential mechanism, semiaxis and wheel；According to system
The transmitting wasted power of system and the difference that counts of third power obtain the transmitting lost work of each speed point in corresponding pre-set velocity interval
Rate.
Further, optionally, the test condition according to preset each transmission parts in automobile, respectively according to the biography of system
Pass wasted power calculate each transmission parts transmitting wasted power include: bridge and transmission shaft upon opening connecting pin, starting turn
In the case where drum, rotated by rotary drum band motor car wheel, wheel drives semiaxis and differential mechanism rotating, and by adjusting the power of rotary drum and
Revolving speed obtains each speed point in pre-set velocity interval correspond to revolving speed and torque that rotary drum inputs the in pre-set velocity interval
Four power, wherein the 4th power is the transmitting wasted power of differential mechanism, semiaxis and wheel；Foundation third power and the 4th power,
Obtain the transmitting wasted power of the transmission shaft of each speed point in corresponding pre-set velocity interval.
Optionally, the test condition according to preset each transmission parts in automobile, respectively according to the transmitting lost work of system
Rate calculate each transmission parts transmitting wasted power include: in the case where disconnecting the connection starting rotary drum of semiaxis and differential mechanism,
It is rotated by rotary drum band motor car wheel, wheel drives semiaxis rotation, and by adjusting the power and revolving speed of rotary drum, in pre-set velocity interval
In, it obtains each speed point in pre-set velocity interval and corresponds to the revolving speed of rotary drum input and the 5th power of torque, wherein the 5th power
For the transmitting wasted power of semiaxis and wheel；According to the 5th power and the 4th power, each speed in corresponding pre-set velocity interval is obtained
Spend the transmitting wasted power of the differential mechanism of point.
Further, optionally, the test condition according to preset each transmission parts in automobile, respectively according to the biography of system
Passing wasted power and calculating the transmitting wasted power of each transmission parts includes: to start rotary drum in the connection for disconnecting semiaxis and wheel
In the case of, it is rotated by rotary drum band motor car wheel, and by adjusting the power and revolving speed of rotary drum, in pre-set velocity interval, is obtained pre-
If in speed interval each speed point correspond to rotary drum input revolving speed and torque the 6th power, wherein the 6th power be wheel and
The transmitting wasted power of brake disc parasite drag；According to the 6th power and the 5th power, obtain each in corresponding pre-set velocity interval
The transmitting wasted power of the semiaxis of speed point.
Optionally, the test condition according to preset each transmission parts in automobile, respectively according to the transmitting lost work of system
The transmitting wasted power that rate calculates each transmission parts includes: to be driven in the case where removing brake disc starting rotary drum by rotary drum
Wheel rotation, and by adjusting the power and revolving speed of rotary drum, in pre-set velocity interval, obtain each speed point in pre-set velocity interval
The revolving speed of corresponding rotary drum input and the 7th power of torque, wherein the 7th power is the fricting loss power of wheel；According to the 7th
Power and the 6th power obtain the parasitic loss power of the brake disc of each speed point in corresponding pre-set velocity interval.
According to another aspect of an embodiment of the present invention, a kind of device of power detection is additionally provided, comprising: module is obtained,
For when automobile is on rotary drum platform, obtaining the first power of the engine input gearbox in pre-set velocity interval respectively,
And rotary drum is exported to the second power of automobile in corresponding rotary drum platform；Power computation module, for according to the first power and
Second power obtains the transmitting wasted power of system；Power detection module, for according to preset each transmission parts in automobile
Test condition calculates the transmitting wasted power of each transmission parts according to the transmitting wasted power of system respectively.
Optionally, obtaining module includes: acquiring unit, for gearbox to be placed in D grades of traveling, inputs default turn round in rotary drum
Square obtains gearbox input torque and revolving speed by controller local area network's CAN signal, the first power is calculated.
Another aspect according to an embodiment of the present invention, additionally provides a kind of system of power detection, comprising: rotary drum platform and
Automobile, wherein when automobile is on rotary drum platform, obtain automobile engine input gearbox in pre-set velocity interval respectively
Rotary drum is inputted or is exported to the second power of automobile in first power and corresponding rotary drum platform；According to the first power and the
Two power obtain the transmitting wasted power of system；And the test condition according to each transmission parts preset in automobile, foundation respectively
The transmitting wasted power of system calculates the transmitting wasted power of each transmission parts.
In embodiments of the present invention, by obtaining sent out in pre-set velocity interval respectively when automobile is on rotary drum platform
Rotary drum is exported to the second power of automobile in the first power and corresponding rotary drum platform of motivation input gearbox；According to the
One power and the second power obtain the transmitting wasted power of system；The test condition of preset each transmission parts in foundation automobile,
The transmitting wasted power for calculating each transmission parts according to the transmitting wasted power of system respectively, has reached in whole vehicle state underdrive
System transmits the purpose of wasted power measurement, to realize the efficiency of raising measurement and reduce the technology of the cost of testing experiment
Effect, and then the low technology of transmission system transmitting wasted power measurement accuracy solved due to the prior art on wheel is asked
Topic.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow diagram of the method for power detection according to an embodiment of the present invention；
Fig. 2 is the schematic diagram that power is detected in a kind of method of power detection according to an embodiment of the present invention；
Fig. 3 is the flow diagram in a kind of method of power detection according to an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the device of power detection according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment one
According to embodiments of the present invention, a kind of embodiment of the method for power detection is provided, it should be noted that in attached drawing
The step of process illustrates can execute in a computer system such as a set of computer executable instructions, although also,
Logical order is shown in flow chart, but in some cases, it can be to be different from shown by sequence execution herein or retouch
The step of stating.
Fig. 1 is the flow diagram of the method for power detection according to an embodiment of the present invention, as shown in Figure 1, this method packet
Include following steps:
Step S102 obtains the engine in pre-set velocity interval respectively and inputs speed change when automobile is on rotary drum platform
Rotary drum is exported to the second power of automobile in first power of case and corresponding rotary drum platform；
Step S104 obtains the transmitting wasted power of system according to the first power and the second power；
Step S106 loses according to the transmitting of system respectively according to the test condition of preset each transmission parts in automobile
The transmitting wasted power of each transmission parts of power calculation.
In embodiments of the present invention, by obtaining sent out in pre-set velocity interval respectively when automobile is on rotary drum platform
Rotary drum is exported to the second power of automobile in the first power and corresponding rotary drum platform of motivation input gearbox；According to the
One power and the second power obtain the transmitting wasted power of system；The test condition of preset each transmission parts in foundation automobile,
The transmitting wasted power for calculating each transmission parts according to the transmitting wasted power of system respectively, has reached in whole vehicle state underdrive
System transmits the purpose of wasted power measurement, to realize the efficiency of raising measurement and reduce the technology of the cost of testing experiment
Effect, and then the low technology of transmission system transmitting wasted power measurement accuracy solved due to the prior art on wheel is asked
Topic.
Optionally, acquisition first power of engine input gearbox in pre-set velocity interval includes: in step S102
Gearbox is placed in D grades of traveling by Step1, is inputted predetermined torque in rotary drum, is believed by controller local area network CAN
Number acquisition gearbox input torque and revolving speed, are calculated the first power.
Optionally, the test condition in step S106 according to preset each transmission parts in automobile, respectively according to system
Transmitting wasted power calculates the transmitting wasted powers of each transmission parts and includes:
Step1 disconnects transmission shaft in the output end of gearbox, and engine misses pass through rotary drum in the case where starting rotary drum
Band motor car wheel rotates, and wheel drives semiaxis, differential mechanism and transmission shaft rotation, and by adjusting the power and revolving speed of rotary drum, default
In speed interval, obtains each speed point in pre-set velocity interval and corresponds to the revolving speed of rotary drum input and the third power of torque, wherein
Third power is the transmitting wasted power of transmission shaft, differential mechanism, semiaxis and wheel；
Step2 is obtained in corresponding pre-set velocity interval according to the transmitting wasted power of system and the difference that counts of third power
The transmitting wasted power of each speed point.
Further, optionally, the test condition in step S106 according to preset each transmission parts in automobile, respectively according to
Include: according to the transmitting wasted power that the transmitting wasted power of system calculates each transmission parts
Step1, the connecting pin of bridge and transmission shaft, in the case where starting rotary drum, is revolved by rotary drum band motor car wheel upon opening
Turn, wheel drives semiaxis and differential mechanism rotating, and by adjusting the power and revolving speed of rotary drum, in pre-set velocity interval, obtains pre-
If in speed interval each speed point correspond to rotary drum input revolving speed and torque the 4th power, wherein the 4th power be differential mechanism,
The transmitting wasted power of semiaxis and wheel；
Step2 obtains the transmission shaft of each speed point in corresponding pre-set velocity interval according to third power and the 4th power
Transmit wasted power.
Optionally, the test condition in step S106 according to preset each transmission parts in automobile, respectively according to system
Transmitting wasted power calculates the transmitting wasted powers of each transmission parts and includes:
Step1 is rotated in the case where disconnecting the connection starting rotary drum of semiaxis and differential mechanism by rotary drum band motor car wheel,
Wheel drives semiaxis rotation, and by adjusting the power and revolving speed of rotary drum, in pre-set velocity interval, obtains in pre-set velocity interval
Each speed point corresponds to the revolving speed of rotary drum input and the 5th power of torque, wherein the 5th power is the transmitting damage of semiaxis and wheel
Lose power；
Step2 obtains the differential mechanism of each speed point in corresponding pre-set velocity interval according to the 5th power and the 4th power
Transmit wasted power.
Further, optionally, the test condition in step S106 according to preset each transmission parts in automobile, respectively according to
Include: according to the transmitting wasted power that the transmitting wasted power of system calculates each transmission parts
Step1 is rotated in the case where disconnecting the connection starting rotary drum of semiaxis and wheel by rotary drum band motor car wheel, and
By adjusting the power and revolving speed of rotary drum, in pre-set velocity interval, it is defeated to correspond to rotary drum for each speed point in acquisition pre-set velocity interval
6th power of the revolving speed and torque that enter, wherein the 6th power is the transmitting wasted power of wheel and brake disc parasite drag；
Step2 obtains the biography of the semiaxis of each speed point in corresponding pre-set velocity interval according to the 6th power and the 5th power
Pass wasted power.
Optionally, the test condition in step S106 according to preset each transmission parts in automobile, respectively according to system
Transmitting wasted power calculates the transmitting wasted powers of each transmission parts and includes:
Step1, remove brake disc starting rotary drum in the case where, by rotary drum band motor car wheel rotate, and by adjusting turn
Bulging power and revolving speed, in pre-set velocity interval, obtain pre-set velocity interval in each speed point correspond to rotary drum input revolving speed with
7th power of torque, wherein the 7th power is the fricting loss power of wheel；
Step2 obtains the brake disc of each speed point in corresponding pre-set velocity interval according to the 7th power and the 6th power
Parasitic loss power.
To sum up, the schematic diagram of power is detected in the method for power detection provided by the present application as shown in Fig. 2, the application provides
Power detection method flow diagram it is as shown in Figure 3.
Entirely tested in the method for power detection provided by the present application process do not need individually to build it is jack horse test bed, whole
It is tested under vehicle environment, vehicle is checked first, it is ensured that vehicle can operate normally, while consider the difference of vehicle
Adjustment mileage influences whether the transmission efficiency of transmission system, so in needing to carry out centainly vehicle according to test specification before test
The adjustment of journey, usually merging mileage is 3000km, and the loaded-up condition of vehicle also influences whether the transmission efficiency of transmission system, it is desirable that
The loaded-up condition and loading position of adjustment vehicle before test.
Vehicle is fixed on rotary drum later and is tested, the signal for testing needs includes gearbox input power and rotary drum
It to the power of wheel, can be obtained by torque and revolving speed, gearbox input speed and torque can be read by CAN bus
It takes, rotary drum input/output revolving speed and torque can be obtained by drum dynamometer.
Firstly, gearbox is placed in D grades, starts engine, certain torque is inputted by rotary drum, is able to vehicle
Stable speed operation reads CAN at 30/60/90/120km/h (that is, each speed point in pre-set velocity interval in the embodiment of the present application)
The power P 1 of engine input speed changer is calculated (that is, the embodiment of the present application in gearbox input torque and revolving speed in signal
In the first power), while reading revolving speed and torque that rotary drum inputs to wheel under each corresponding revolving speed, it is defeated that rotary drum be calculated
Enter or export and give the power P 2 of vehicle (that is, second power in the embodiment of the present application), then the transmitting power of entire transmission system
Loss is P1-P2, and the power loss of transmission system here includes since gearbox to the biography of the entire transmission path of wheel
Loss is passed, this power loss can be used as system-level target；
Transmission shaft is disconnected from transmission output later, engine misses start rotary drum, revolve by rotary drum band motor car wheel
Turn, wheel drives semiaxis, differential mechanism and transmission shaft rotation, by adjusting the power and revolving speed of rotary drum that speed is stable 30/ respectively
60/90/120km/h, records revolving speed and torque that each speed point corresponds to rotary drum input, this Partial Power is denoted as P3 (that is, the application
Third power in embodiment), it is the transmitting loss of transmission shaft, differential mechanism (may include main reducing gear), semiaxis and wheel, together
When P1-P2-P3 be respectively transmitting wasted power when corresponding to 30/60/90/120km/h；
Third step disconnects the connecting pin of rear axle and transmission shaft, starts rotary drum, is rotated by rotary drum band motor car wheel, wheel band
Dynamic semiaxis and differential mechanism rotating, it is by adjusting the power and revolving speed of rotary drum that speed is stable in 30/60/90/120km/h, note respectively
Revolving speed and torque that each speed point corresponds to rotary drum input are recorded, this Partial Power is denoted as P4 (that is, the 4th function in the embodiment of the present application
Rate), it is that the transmitting of differential mechanism (may include main reducing gear), semiaxis and wheel is lost, while P3-P4 corresponds respectively to 30/60/
The transmitting wasted power of transmission shaft when 90/120km/h speed；
4th step disconnects the connection of semiaxis and differential mechanism, starts rotary drum, is rotated by rotary drum band motor car wheel, wheel drives
Semiaxis rotation, it is by adjusting the power and revolving speed of rotary drum that speed is stable in 30/60/90/120km/h respectively, record each speed point
The revolving speed and torque of corresponding rotary drum input, this Partial Power are denoted as P5 (that is, the 5th power in the embodiment of the present application), are semiaxis
Transmitting with wheel is lost, while P5-P4 corresponds respectively to the transmitting lost work of differential mechanism when 30/60/90/120km/h speed
Rate；
5th step disconnects the connection of semiaxis and wheel, starts rotary drum, is rotated by rotary drum band motor car wheel, by adjusting turning
Bulging power and revolving speed is stable in 30/60/90/120km/h respectively by speed, record each speed point correspond to rotary drum input revolving speed and
Torque, this Partial Power are denoted as P6 (that is, the 6th power in the embodiment of the present application), are the biography of wheel and brake disc parasite drag
Loss is passed, while P6-P5 corresponds respectively to the transmitting wasted power of semiaxis when 30/60/90/120km/h speed；
6th step, remove brake disc, start rotary drum, by rotary drum band motor car wheel rotate, by adjusting rotary drum power and turn
Speed is stable in 30/60/90/120km/h respectively by speed, records revolving speed and torque that each speed point corresponds to rotary drum input, this portion
Divide power to be denoted as P7 (that is, the 7th power in the embodiment of the present application), is the friction loss of wheel, while P7-P6 is respectively corresponded
The parasitic loss power of brake disc when 30/60/90/120km/h speed；
Specifically, the process of the method for the corresponding power detection of Fig. 3 is specific as follows:
Firstly, gearbox is placed in D grades, starts engine, certain torque is inputted by rotary drum, is able to vehicle
Stable speed operation reads gearbox input torque and revolving speed in CAN signal, engine is calculated in 30/60/90/120km/h
The power P 1 of speed changer is inputted, while reading revolving speed and torque that rotary drum inputs to wheel under each corresponding revolving speed, is calculated
Rotary drum input is exported to the power P 2 of vehicle, then the transmitting power loss of entire transmission system is P1-P2, transmission here
The power loss of system includes losing since gearbox to the transmitting of the entire transmission path of wheel, this power loss can be made
For system-level target；
Transmission shaft is disconnected from transmission output later, engine misses start rotary drum, revolve by rotary drum band motor car wheel
Turn, wheel drives semiaxis, differential mechanism and transmission shaft rotation, by adjusting the power and revolving speed of rotary drum that speed is stable 30/ respectively
60/90/120km/h records revolving speed and torque that each speed point corresponds to rotary drum input, this Partial Power is denoted as P3, be transmission shaft,
The transmitting of differential mechanism (may include main reducing gear), semiaxis and wheel is lost, while P1-P2-P3 is respectively to correspond to 30/60/
Transmitting wasted power when 90/120km/h；
Third step disconnects the connecting pin of rear axle and transmission shaft, starts rotary drum, is rotated by rotary drum band motor car wheel, wheel band
Dynamic semiaxis and differential mechanism rotating, it is by adjusting the power and revolving speed of rotary drum that speed is stable in 30/60/90/120km/h, note respectively
Revolving speed and torque that each speed point corresponds to rotary drum input are recorded, it (may include main deceleration for differential mechanism that this Partial Power, which is denoted as P4,
Device), the transmitting loss of semiaxis and wheel, while P3-P4 corresponds respectively to the biography of transmission shaft when 30/60/90/120km/h speed
Pass wasted power；
4th step disconnects the connection of semiaxis and differential mechanism, starts rotary drum, is rotated by rotary drum band motor car wheel, wheel drives
Semiaxis rotation, it is by adjusting the power and revolving speed of rotary drum that speed is stable in 30/60/90/120km/h respectively, record each speed point
The revolving speed and torque of corresponding rotary drum input, this Partial Power are denoted as P5, are the transmitting loss of semiaxis and wheel, while P5-P4 divides
Not Dui Yingyu 30/60/90/120km/h speed when differential mechanism transmitting wasted power；
5th step disconnects the connection of semiaxis and wheel, starts rotary drum, is rotated by rotary drum band motor car wheel, by adjusting turning
Bulging power and revolving speed is stable in 30/60/90/120km/h respectively by speed, record each speed point correspond to rotary drum input revolving speed and
Torque, this Partial Power are denoted as P6, are the transmitting loss of wheel and brake disc parasite drag, while P6-P5 corresponds respectively to 30/
The transmitting wasted power of semiaxis when 60/90/120km/h speed；
6th step, remove brake disc, start rotary drum, by rotary drum band motor car wheel rotate, by adjusting rotary drum power and turn
Speed is stable in 30/60/90/120km/h respectively by speed, records revolving speed and torque that each speed point corresponds to rotary drum input, this portion
Divide power to be denoted as P7, is the friction loss of wheel, while P7-P6 corresponds respectively to brake disc when 30/60/90/120km/h speed
Parasitic loss power；
Scheme measures the transmission efficiency or transmitting of each components by the bench test of each components compared with the prior art
On the one hand wasted power does not need dedicated rack in the method for power detection provided by the present application, improve working efficiency and simultaneously
Testing cost is reduced, on the other hand, the bench test state of components and the state being mounted on vehicle are not the same, cause to survey
The transmitting that the result of amount cannot represent the transmission system in actual installation to vehicle is lost, and power detection provided by the present application
Method is entirely to carry out under whole vehicle state, and working environment is identical with vehicle actual motion environment, can reflect vehicle reality strictly according to the facts
The operation conditions on border.
Embodiment two
According to another aspect of an embodiment of the present invention, a kind of device of power detection is additionally provided, Fig. 4 is according to the present invention
The structural schematic diagram of the device of the power detection of embodiment, as shown in Figure 4, comprising:
Module 42 is obtained, for it is defeated to obtain the engine in pre-set velocity interval respectively when automobile is on rotary drum platform
Enter rotary drum in the first power and corresponding rotary drum platform of gearbox to export to the second power of automobile；Power calculation mould
Block 44, for obtaining the transmitting wasted power of system according to the first power and the second power；Power detection module 46, for according to
According to the test condition of each transmission parts preset in automobile, each transmission parts are calculated according to the transmitting wasted power of system respectively
Transmit wasted power.
In embodiments of the present invention, by obtaining sent out in pre-set velocity interval respectively when automobile is on rotary drum platform
Motivation inputs rotary drum input in the first power and corresponding rotary drum platform of gearbox or exports to the second power of automobile；
According to the first power and the second power, the transmitting wasted power of system is obtained；Survey according to preset each transmission parts in automobile
Strip part calculates the transmitting wasted power of each transmission parts according to the transmitting wasted power of system respectively, has reached in vehicle shape
State lower transmission system transmit wasted power measurement purpose, thus realize improve measurement efficiency and reduce testing experiment at
This technical effect, and then the transmission system transmitting wasted power measurement accuracy solved due to the prior art on wheel is low
Technical problem.
Optionally, obtaining module 42 includes: acquiring unit, default in rotary drum input for gearbox to be placed in D grades of traveling
Torque obtains gearbox input torque and revolving speed by controller local area network's CAN signal, the first power is calculated.
Embodiment three
Another aspect according to an embodiment of the present invention, additionally provides a kind of system of power detection, comprising: rotary drum platform and
Automobile, wherein when automobile is on rotary drum platform, obtain automobile engine input gearbox in pre-set velocity interval respectively
Rotary drum is inputted or is exported to the second power of automobile in first power and corresponding rotary drum platform；According to the first power and the
Two power obtain the transmitting wasted power of system；And the test condition according to each transmission parts preset in automobile, foundation respectively
The transmitting wasted power of system calculates the transmitting wasted power of each transmission parts.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of method of power detection characterized by comprising
When automobile is on rotary drum platform, the first power of the engine input gearbox in pre-set velocity interval is obtained respectively,
And rotary drum is exported to the second power of the automobile in the corresponding rotary drum platform；
According to first power and second power, the transmitting wasted power of system is obtained；
According to the test condition of each transmission parts preset in the automobile, respectively according to the transmitting wasted power meter of the system
Calculate the transmitting wasted power of each transmission parts.
2. the method for power detection according to claim 1, which is characterized in that the acquisition is sent out in pre-set velocity interval
Motivation input gearbox the first power include:
The gearbox is placed in D grades of traveling, predetermined torque is inputted in the rotary drum, passes through controller local area network's CAN signal
The gearbox input torque and revolving speed are obtained, first power is calculated.
3. the method for power detection according to claim 1, which is characterized in that described according to preset each in the automobile
The test condition of transmission parts calculates the transmitting loss of each transmission parts according to the transmitting wasted power of the system respectively
Power includes:
Transmission shaft is disconnected in the output end of the gearbox, the engine misses in the case where starting the rotary drum, pass through institute
It states rotary drum band motor car wheel to rotate, the wheel drives semiaxis, differential mechanism and transmission shaft rotation, and by adjusting the power of the rotary drum
And revolving speed obtains each speed point in the pre-set velocity interval and corresponds to the rotary drum input in the pre-set velocity interval
The third power of revolving speed and torque, wherein the third power is the transmission shaft, the differential mechanism, the semiaxis and described
The transmitting wasted power of wheel；
According to the transmitting wasted power of the system and the difference that counts of the third power, obtain corresponding to the pre-set velocity interval
In each speed point the transmitting wasted power.
4. the method for power detection according to claim 3, which is characterized in that described according to preset each in the automobile
The test condition of transmission parts calculates the transmitting loss of each transmission parts according to the transmitting wasted power of the system respectively
Power includes:
The connecting pin of bridge and the transmission shaft upon opening, in the case where starting the rotary drum, by described in rotary drum drive
Wheel rotation, the wheel drive the semiaxis and the differential mechanism rotating, and by adjusting the power and revolving speed of the rotary drum,
In the pre-set velocity interval, revolving speed and torque that each speed point in the pre-set velocity interval corresponds to the rotary drum input are obtained
The 4th power, wherein the 4th power be the differential mechanism, the semiaxis and the wheel transmitting wasted power；
According to the third power and the 4th power, obtain corresponding to the biography of each speed point in the pre-set velocity interval
The transmitting wasted power of moving axis.
5. the method for power detection according to claim 4, which is characterized in that described according to preset each in the automobile
The test condition of transmission parts calculates the transmitting loss of each transmission parts according to the transmitting wasted power of the system respectively
Power includes:
In the case where the connection for disconnecting the semiaxis and the differential mechanism starts the rotary drum, institute is driven by the rotary drum
Wheel rotation is stated, the wheel drives the semiaxis rotation, and by adjusting the power and revolving speed of the rotary drum, in the default speed
It spends in section, obtains each speed point in the pre-set velocity interval and correspond to the revolving speed of the rotary drum input and the 5th function of torque
Rate, wherein the 5th power is the transmitting wasted power of the semiaxis and the wheel；
According to the 5th power and the 4th power, obtain corresponding to the differential mechanism of each speed point in the pre-set velocity interval
Transmitting wasted power.
6. the method for power detection according to claim 5, which is characterized in that described according to preset each in the automobile
The test condition of transmission parts calculates the transmitting loss of each transmission parts according to the transmitting wasted power of the system respectively
Power includes:
In the case where the connection for disconnecting the semiaxis and wheel starts the rotary drum, the wheel is driven by the rotary drum
Rotation, and by adjusting the power and revolving speed of the rotary drum, in the pre-set velocity interval, obtain in the pre-set velocity interval
Each speed point corresponds to the revolving speed of rotary drum input and the 6th power of torque, wherein the 6th power be the wheel and
The transmitting wasted power of brake disc parasite drag；
According to the 6th power and the 5th power, obtain corresponding to described half of each speed point in the pre-set velocity interval
The transmitting wasted power of axis.
7. the method for power detection according to claim 6, which is characterized in that described according to preset each in the automobile
The test condition of transmission parts calculates the transmitting loss of each transmission parts according to the transmitting wasted power of the system respectively
Power includes:
In the case where removing the brake disc and starting the rotary drum, the wheel is driven to rotate by the rotary drum, and pass through
The power and revolving speed for adjusting the rotary drum obtain each speed point pair in the pre-set velocity interval in the pre-set velocity interval
Answer the revolving speed of the rotary drum input and the 7th power of torque, wherein the 7th power is the friction loss function of the wheel
Rate；
According to the 7th power and the 6th power, obtain corresponding to the system of each speed point in the pre-set velocity interval
The parasitic loss power of Moving plate.
8. a kind of device of power detection characterized by comprising
Module is obtained, inputs speed change for when automobile is on rotary drum platform, obtaining the engine in pre-set velocity interval respectively
Rotary drum is exported to the second power of the automobile in first power of case and the corresponding rotary drum platform；
Power computation module, for obtaining the transmitting wasted power of system according to first power and second power；
Power detection module, for the test condition according to each transmission parts preset in the automobile, respectively according to the system
The transmitting wasted power of system calculates the transmitting wasted power of each transmission parts.
9. the device of power detection according to claim 8, which is characterized in that the acquisition module includes:
Acquiring unit inputs predetermined torque in the rotary drum, by controlling general ability for the gearbox to be placed in D grades of traveling
Gearbox input torque and revolving speed described in the network C AN signal acquisition of domain, are calculated first power.
10. a kind of system of power detection characterized by comprising rotary drum platform and automobile, wherein when the automobile is in institute
When stating on rotary drum platform, the first power of automobile engine input gearbox in pre-set velocity interval is obtained respectively, with
And rotary drum is inputted or is exported to the second power of the automobile in the corresponding rotary drum platform；
According to first power and second power, the transmitting wasted power of system is obtained；And according to pre- in the automobile
If each transmission parts test condition, the biography of each transmission parts is calculated according to the transmitting wasted power of the system respectively
Pass wasted power.
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| CN201711391878.2A CN109946005B (en) | 2017-12-20 | 2017-12-20 | Method, device and system for power detection |
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| CN201711391878.2A CN109946005B (en) | 2017-12-20 | 2017-12-20 | Method, device and system for power detection |
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| CN112051073A (en) * | 2020-08-27 | 2020-12-08 | 安徽江淮汽车集团股份有限公司 | Vehicle transmission resistance measuring method, vehicle transmission resistance measuring system and vehicle transmission resistance measuring storage medium |
| CN112485022A (en) * | 2020-12-23 | 2021-03-12 | 北京新能源汽车股份有限公司 | Test method and device for measuring energy recovery efficiency of vehicle |
| CN117232700A (en) * | 2023-10-31 | 2023-12-15 | 中国重汽集团济南动力有限公司 | Electric drive axle power loss test methods, devices, equipment and media |
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Denomination of invention: Power detection method, device and system Effective date of registration: 20211213 Granted publication date: 20210226 Pledgee: BEIJING AUTOMOTIVE GROUP Co.,Ltd. Pledgor: Borgward Automotive (China) Co., Ltd. Registration number: Y2021990001167 |
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