CN109946005B - Method, device and system for power detection - Google Patents
Method, device and system for power detection Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for power detection. Wherein, the method comprises the following steps: when an automobile is on a rotary drum platform, respectively acquiring first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in the corresponding rotary drum platform; obtaining the transmission loss power of the system according to the first power and the second power; and respectively calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test conditions of each transmission component preset in the automobile. The invention solves the technical problem of low measurement precision of transmission loss power of a transmission system on a wheel in the prior art.
Description
Technical Field
The invention relates to the field of automobile technology application, in particular to a method, a device and a system for power detection.
Background
In order to meet the increasingly strict requirements of fuel consumption regulations, different measures are respectively adopted by each host factory to reduce the fuel consumption of the vehicle, and in order to achieve the aim of reducing the fuel consumption, on one hand, the energy transfer efficiency of a power source needs to be improved, for example, the heat efficiency of an internal combustion engine needs to be improved, and the conversion efficiency of electric energy to mechanical energy needs to be improved by an electric motor; on the other hand, it is necessary to improve the transmission efficiency of a vehicle transmission system, which is a power transmission device between a vehicle power source and drive wheels and which basically functions to transmit power, and to reduce the transmission loss power of each transmission member. The traditional internal combustion engine type automobile transmission system mainly comprises a hydraulic torque converter or clutch, a transmission, a main speed reducer, a transmission shaft, a four-wheel drive torque distribution device, a differential mechanism, a half shaft, a brake disc, tires and other parts, an electric automobile does not generally need the transmission, but still needs the transmission shaft and other devices, the transmission efficiency of the automobile transmission system can reflect the comprehensive performance of the automobile transmission system, including the design level and the manufacturing level of the automobile transmission system, and can reflect the power loss inside the automobile transmission system. In the process of optimizing the transmission efficiency of the transmission system, the transmission loss power of the transmission system needs to be tested in each development stage, the sensitivity of the transmission loss power of each component of the transmission system to the environmental variable and the working state change is different according to the difference of the working characteristics of each transmission system, and how to quickly and accurately test the transmission loss power of the transmission system is the key work of system optimization.
The method comprises the steps of firstly, obtaining the transmission loss power of each transmission system part by controlling the rotating speed and the torque of an input motor and comparing the rotating speed and the torque with the torque of a torque sensor to obtain the transmission loss power of each transmission system part, wherein the measuring method needs a special rack on one hand, wastes time and labor, has higher working efficiency and cost, on the other hand, the rack test state of each part is inconsistent with the state of the whole vehicle, and the measured result cannot represent the transmission loss of the transmission system actually installed on the vehicle.
Aiming at the problem of low power measurement precision of the transmission system transmission loss on the vehicle due to the prior art, no effective solution is provided at present.
Disclosure of Invention
The embodiment of the invention provides a method, a device and a system for power detection, which at least solve the technical problem of low power measurement precision due to transmission loss of a transmission system on a wheel in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a method of power detection, including: when an automobile is on a rotary drum platform, respectively acquiring first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in the corresponding rotary drum platform; obtaining the transmission loss power of the system according to the first power and the second power; and respectively calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test conditions of each transmission component preset in the automobile.
Optionally, the obtaining the first power input into the transmission by the engine in the preset speed interval comprises: the method comprises the steps of placing a gearbox in a D-gear, inputting a preset torque at a rotary drum, obtaining the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain first power.
Optionally, calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the automobile includes: disconnecting a transmission shaft at the output end of the gearbox, flameout an engine, and starting a rotary drum, driving wheels to rotate through the rotary drum, driving a half shaft, a differential mechanism and the transmission shaft to rotate through the wheels, and acquiring third power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the third power is the transmission loss power of the transmission shaft, the differential mechanism, the half shaft and the wheels; and obtaining the transmission loss power corresponding to each speed point in the preset speed interval according to the arithmetic difference between the transmission loss power of the system and the third power.
Further, optionally, calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile includes: under the condition that a connecting end of a rear axle and a transmission shaft is disconnected and a rotary drum is started, wheels are driven to rotate through the rotary drum, the wheels drive a half shaft and a differential mechanism to rotate, and fourth power of rotating speed and torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting force and rotating speed of the rotary drum, wherein the fourth power is transmission loss power of the differential mechanism, the half shaft and the wheels; and obtaining the transmission loss power of the transmission shaft corresponding to each speed point in the preset speed interval according to the third power and the fourth power.
Optionally, calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the automobile includes: under the condition that the connection between the half shaft and the differential is disconnected and the rotary drum is started, the rotary drum drives the wheels to rotate, the wheels drive the half shaft to rotate, and fifth power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the fifth power is the transmission loss power of the half shaft and the wheels; and obtaining the transmission loss power of the differential corresponding to each speed point in the preset speed interval according to the fifth power and the fourth power.
Further, optionally, calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile includes: under the condition that the half shaft is disconnected from the wheel and the rotary drum is started, the wheel is driven to rotate through the rotary drum, and through adjusting the force and the rotating speed of the rotary drum, sixth power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval, wherein the sixth power is transmission loss power of parasitic resistance of the wheel and the brake disc; and obtaining the transmission loss power of the half shaft corresponding to each speed point in the preset speed interval according to the sixth power and the fifth power.
Optionally, calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the automobile includes: under the condition that a brake disc is removed and a rotary drum is started, the rotary drum drives wheels to rotate, and seventh power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the seventh power is the friction loss power of the wheels; and obtaining the parasitic loss power of the brake disc corresponding to each speed point in the preset speed interval according to the seventh power and the sixth power.
According to another aspect of the embodiments of the present invention, there is also provided an apparatus for power detection, including: the acquisition module is used for respectively acquiring first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in a corresponding rotary drum platform when the automobile is on the rotary drum platform; the power calculation module is used for obtaining the transmission loss power of the system according to the first power and the second power; and the power detection module is used for calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile.
Optionally, the obtaining module includes: the acquisition unit is used for placing the gearbox in a D-gear, inputting a preset torque at the rotary drum, acquiring the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain first power.
According to another aspect of the embodiments of the present invention, there is also provided a system for power detection, including: the system comprises a rotary drum platform and an automobile, wherein when the automobile is arranged on the rotary drum platform, first power input into a gearbox by an engine of the automobile in a preset speed interval and second power input into or output from a rotary drum in the corresponding rotary drum platform to the automobile are respectively obtained; obtaining the transmission loss power of the system according to the first power and the second power; and calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile.
In the embodiment of the invention, when an automobile is on a rotary drum platform, first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in the corresponding rotary drum platform are respectively obtained; obtaining the transmission loss power of the system according to the first power and the second power; according to the testing conditions of each transmission part preset in the automobile, the transmission loss power of each transmission part is calculated according to the transmission loss power of the system, and the purpose of measuring the transmission loss power of the transmission system in the whole automobile state is achieved, so that the technical effects of improving the measuring efficiency and reducing the cost of a testing test are achieved, and the technical problem that the transmission loss power of the transmission system on the wheel in the prior art is low in measuring precision is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow diagram of a method of power detection according to an embodiment of the invention;
FIG. 2 is a schematic diagram of power detection in a method of power detection according to an embodiment of the invention;
FIG. 3 is a flow chart of a method of power detection according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
In accordance with an embodiment of the present invention, there is provided a method embodiment of power detection, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a schematic flow chart of a method of power detection according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
step S102, when the automobile is on a rotary drum platform, respectively acquiring first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in the corresponding rotary drum platform;
step S104, obtaining the transmission loss power of the system according to the first power and the second power;
and step S106, calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile.
In the embodiment of the invention, when an automobile is on a rotary drum platform, first power input into a gearbox by an engine in a preset speed interval and second power output to the automobile by a rotary drum in the corresponding rotary drum platform are respectively obtained; obtaining the transmission loss power of the system according to the first power and the second power; according to the testing conditions of each transmission part preset in the automobile, the transmission loss power of each transmission part is calculated according to the transmission loss power of the system, and the purpose of measuring the transmission loss power of the transmission system in the whole automobile state is achieved, so that the technical effects of improving the measuring efficiency and reducing the cost of a testing test are achieved, and the technical problem that the transmission loss power of the transmission system on the wheel in the prior art is low in measuring precision is solved.
Optionally, the step S102 of obtaining the first power input into the transmission by the engine in the preset speed interval includes:
and Step1, placing the gearbox in a D-gear, inputting a preset torque at the rotary drum, acquiring the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain first power.
Optionally, the step S106 of calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the vehicle includes:
step1, disconnecting the transmission shaft at the output end of the gearbox, stopping the engine, and starting the rotary drum, wherein the rotary drum drives the wheels to rotate, the wheels drive the half shaft, the differential and the transmission shaft to rotate, and third power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the third power is the transmission loss power of the transmission shaft, the differential, the half shaft and the wheels;
and Step2, obtaining the transmission loss power corresponding to each speed point in the preset speed interval according to the arithmetic difference between the transmission loss power of the system and the third power.
Further, optionally, the step S106 of calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the vehicle includes:
step1, under the condition that the connecting end of the rear axle and the transmission shaft is disconnected and the rotary drum is started, the rotary drum drives the wheels to rotate, the wheels drive the half axle and the differential mechanism to rotate, and fourth power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the fourth power is the transmission loss power of the differential mechanism, the half axle and the wheels;
and Step2, obtaining the transmission loss power of the transmission shaft corresponding to each speed point in the preset speed interval according to the third power and the fourth power.
Optionally, the step S106 of calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the vehicle includes:
step1, under the condition that the half shaft and the differential are disconnected and the rotary drum is started, the rotary drum drives the wheel to rotate, the wheel drives the half shaft to rotate, and fifth power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained by adjusting the force and the rotating speed of the rotary drum in the preset speed interval, wherein the fifth power is the transmission loss power of the half shaft and the wheel;
and Step2, obtaining the transmission loss power of the differential corresponding to each speed point in the preset speed interval according to the fifth power and the fourth power.
Further, optionally, the step S106 of calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the vehicle includes:
step1, under the condition that the half shaft is disconnected from the wheel and the rotary drum is started, the rotary drum drives the wheel to rotate, and sixth power of the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the sixth power is the transmission loss power of the parasitic resistance of the wheel and the brake disc;
and Step2, obtaining the transmission loss power of the half shaft corresponding to each speed point in the preset speed interval according to the sixth power and the fifth power.
Optionally, the step S106 of calculating the transmission loss power of each transmission component according to the transmission loss power of the system according to the test condition of each transmission component preset in the vehicle includes:
step1, under the condition that a brake disc is removed and a rotary drum is started, the rotary drum drives a wheel to rotate, and seventh power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the seventh power is the friction loss power of the wheel;
and Step2, obtaining the parasitic loss power of the brake disc corresponding to each speed point in the preset speed interval according to the seventh power and the sixth power.
In summary, a schematic diagram of detecting power in the power detection method provided by the present application is shown in fig. 2, and a flowchart of the power detection method provided by the present application is shown in fig. 3.
The utility model provides a whole testing process need not set up the rack test bench alone in the method of power detection, test under the whole car environment, at first inspect the vehicle, ensure that the vehicle can normal operating, consider simultaneously that the different break-in mileage of vehicle can influence transmission system's transmission efficiency, so need carry out the break-in of certain mileage to the vehicle according to experimental criteria before the experiment, the break-in mileage is 3000km usually, transmission system's transmission efficiency also can be influenced to the load condition of vehicle, require the load condition and the loading position of adjustment vehicle before the experiment.
And then the vehicle is fixed on the rotary drum for testing, signals required by the test comprise input power of the gearbox and power of the rotary drum to wheels, and CAN be obtained through torque and rotating speed, the input rotating speed and the torque of the gearbox CAN be read through a CAN bus, and the input/output rotating speed and the torque of the rotary drum CAN be obtained through a rotary drum test bed.
Firstly, the gearbox is placed in a D gear, the engine is started, a certain torque is input through the rotary drum, the vehicle CAN run at a stable speed of 30/60/90/120km/h (namely, each speed point in a preset speed interval in the embodiment of the application), the input torque and the rotating speed of the gearbox in the CAN signal are read, the power P1 (namely, the first power in the embodiment of the application) input into the transmission by the engine is calculated, meanwhile, the rotating speed and the torque input to the wheels by the rotary drum at each corresponding rotating speed are read, the power P2 (namely, the second power in the embodiment of the application) input or output to the vehicle by the rotary drum is calculated, the transmission power loss of the whole transmission system is P1-P2, wherein the transmission power loss of the transmission system comprises the transmission loss of the whole transmission path from the gearbox to the wheels, and the power loss can be taken as a system level target;
then disconnecting the transmission shaft from the output end of the transmission, stopping the engine, starting the rotary drum, driving wheels to rotate through the rotary drum, driving a half shaft, a differential and the transmission shaft to rotate through the wheels, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, and recording the power of the part as P3 (namely, the third power in the embodiment of the application), which is the transmission loss of the transmission shaft, the differential (possibly comprising a main speed reducer), the half shaft and the wheels, and meanwhile, P1-P2-P3 are the transmission loss power corresponding to 30/60/90/120km/h respectively;
thirdly, disconnecting the connecting end of the rear axle and the transmission shaft, starting the rotary drum, driving wheels to rotate through the rotary drum, driving a half shaft and a differential to rotate through the wheels, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P4 (namely, the fourth power in the embodiment of the application), and recording the power of the transmission loss of the differential (possibly comprising a main speed reducer), the half shaft and the wheels, and simultaneously, the power of the transmission loss of the transmission shaft when the P3-P4 correspond to the vehicle speed of 30/60/90/120;
fourthly, disconnecting the half shaft from the differential, starting the rotary drum, driving the wheels to rotate through the rotary drum, driving the half shaft to rotate through the wheels, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, wherein the part of power is recorded as P5 (namely, the fifth power in the embodiment of the application), and is the transmission loss of the half shaft and the wheels, and meanwhile, the P5-P4 correspond to the transmission loss power of the differential when the vehicle speed is 30/60/90/120km/h respectively;
fifthly, disconnecting the half shaft from the wheel, starting the rotary drum, driving the wheel to rotate through the rotary drum, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P6 (namely, the sixth power in the embodiment of the application), and representing the transmission loss of the parasitic resistance of the wheel and the brake disc, wherein the P6-P5 correspond to the transmission loss power of the half shaft when the vehicle speed is 30/60/90/120km/h respectively;
sixthly, detaching the brake disc, starting the rotary drum, driving the wheel to rotate through the rotary drum, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P7 (namely, the seventh power in the embodiment of the application), and taking the power as the friction loss of the wheel, wherein the power of the parasitic loss of the brake disc is P7-P6 respectively corresponding to the vehicle speed of 30/60/90/120 km/h;
specifically, the flow of the power detection method corresponding to fig. 3 is specifically as follows:
firstly, placing a gearbox in a D gear, starting an engine, inputting a certain torque through a rotary drum to enable a vehicle to run at a stable speed of 30/60/90/120km/h, reading the input torque and the rotating speed of the gearbox in a CAN signal, calculating to obtain the power P1 input by the engine into the gearbox, simultaneously reading the rotating speed and the torque input by the rotary drum to wheels at each corresponding rotating speed, and calculating to obtain the power P2 input by or output by the rotary drum to the vehicle, wherein the transmission power loss of the whole transmission system is P1-P2, the power loss of the transmission system comprises the transmission loss of the whole transmission path from the gearbox to the wheels, and the power loss CAN be used as a system-level target;
then disconnecting a transmission shaft from the output end of the transmission, stopping the engine, starting a rotary drum, driving wheels to rotate through the rotary drum, driving a half shaft, a differential and the transmission shaft to rotate through the wheels, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P3, which is the transmission loss of the transmission shaft, the differential (possibly comprising a main speed reducer), the half shaft and the wheels, and simultaneously recording the transmission loss power of P1-P2-P3 which is corresponding to 30/60/90/120km/h respectively;
thirdly, disconnecting a connecting end of a rear axle and a transmission shaft, starting a rotary drum, driving wheels to rotate through the rotary drum, driving a half shaft and a differential to rotate through the wheels, stabilizing the speed of the vehicle at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each speed point, recording the power of the part as P4, and recording the power of the transmission shaft as the transmission loss of the differential (possibly comprising a main speed reducer), the half shaft and the wheels, and simultaneously, P3-P4 correspond to the transmission loss power of the transmission shaft at the speed of 30/60/90/120 km;
fourthly, disconnecting the half shaft from the differential, starting the rotary drum, driving wheels to rotate through the rotary drum, driving the half shaft to rotate through the wheels, stabilizing the vehicle speed to 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P5, which is the transmission loss of the half shaft and the wheels, and simultaneously recording the transmission loss power of the differential when the P5-P4 correspond to the vehicle speed of 30/60/90/120km/h respectively;
fifthly, disconnecting the half shaft from the wheel, starting the rotary drum, driving the wheel to rotate through the rotary drum, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P6, which is the transmission loss of the parasitic resistance of the wheel and the brake disc, and simultaneously, P6-P5 correspond to the transmission loss power of the half shaft when the vehicle speed is 30/60/90/120km/h respectively;
sixthly, detaching the brake disc, starting the rotary drum, driving the wheel to rotate through the rotary drum, stabilizing the vehicle speed at 30/60/90/120km/h respectively by adjusting the force and the rotating speed of the rotary drum, recording the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point, recording the power of the part as P7, representing the friction loss of the wheel, and simultaneously recording the parasitic loss power of the brake disc when the power of P7-P6 corresponds to the vehicle speed of 30/60/90/120km/h respectively;
compared with the prior art that the transmission efficiency or the transmission loss power of each part is measured through the bench test of each part, on one hand, a special bench is not needed in the power detection method provided by the application, the working efficiency is improved, and the test cost is reduced, on the other hand, the bench test state of each part is inconsistent with the state of the whole vehicle, so that the measurement result cannot represent the transmission loss of a transmission system actually installed on the vehicle.
Example two
According to another aspect of the embodiments of the present invention, there is also provided a power detection apparatus, and fig. 4 is a schematic structural diagram of the power detection apparatus according to the embodiments of the present invention, as shown in fig. 4, including:
the obtaining module 42 is configured to obtain, when the vehicle is on the drum platform, a first power input to the transmission by the engine in a preset speed interval and a second power output to the vehicle by the drum in the corresponding drum platform, respectively; the power calculation module 44 is configured to obtain a transmission loss power of the system according to the first power and the second power; and the power detection module 46 is configured to calculate the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile.
In the embodiment of the invention, when an automobile is on a rotary drum platform, first power input into a gearbox by an engine in a preset speed interval and second power input into or output from a rotary drum in the corresponding rotary drum platform to the automobile are respectively obtained; obtaining the transmission loss power of the system according to the first power and the second power; according to the testing conditions of each transmission part preset in the automobile, the transmission loss power of each transmission part is calculated according to the transmission loss power of the system, and the purpose of measuring the transmission loss power of the transmission system in the whole automobile state is achieved, so that the technical effects of improving the measuring efficiency and reducing the cost of a testing test are achieved, and the technical problem that the transmission loss power of the transmission system on the wheel in the prior art is low in measuring precision is solved.
Optionally, the obtaining module 42 includes: the acquisition unit is used for placing the gearbox in a D-gear, inputting a preset torque at the rotary drum, acquiring the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain first power.
EXAMPLE III
According to another aspect of the embodiments of the present invention, there is also provided a system for power detection, including: the system comprises a rotary drum platform and an automobile, wherein when the automobile is arranged on the rotary drum platform, first power input into a gearbox by an engine of the automobile in a preset speed interval and second power input into or output from a rotary drum in the corresponding rotary drum platform to the automobile are respectively obtained; obtaining the transmission loss power of the system according to the first power and the second power; and calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A method of power detection, comprising:
when an automobile is on a rotary drum platform, respectively acquiring first power input into a gearbox by an engine in a preset speed interval and corresponding second power output to the automobile by a rotary drum in the rotary drum platform;
obtaining transmission loss power of a system according to the first power and the second power;
according to the test conditions of each transmission part preset in the automobile, calculating the transmission loss power of each transmission part according to the transmission loss power of the system;
wherein, the calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile comprises: disconnecting a transmission shaft at the output end of the gearbox, stopping the engine, and starting the rotary drum, wherein the rotary drum drives wheels to rotate, the wheels drive a half shaft, a differential mechanism and the transmission shaft to rotate, and third power of the rotation speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotation speed of the rotary drum, wherein the third power is the transmission loss power of the transmission shaft, the differential mechanism, the half shaft and the wheels; and obtaining the transmission loss power corresponding to each speed point in the preset speed interval according to the operand difference between the transmission loss power of the system and the third power.
2. The method of power detection according to claim 1, wherein said obtaining a first power input to a transmission by an engine in a preset speed interval comprises:
and placing the gearbox in a D-gear, inputting a preset torque into the rotary drum, acquiring the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain the first power.
3. The method for detecting power according to claim 1, wherein the calculating of the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile comprises:
under the condition that a connecting end of a rear axle and the transmission shaft is disconnected and the rotary drum is started, the rotary drum drives the wheels to rotate, the wheels drive the half axle and the differential mechanism to rotate, and fourth power of rotating speed and torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the fourth power is transmission loss power of the differential mechanism, the half axle and the wheels;
and obtaining the transmission loss power of the transmission shaft corresponding to each speed point in the preset speed interval according to the third power and the fourth power.
4. The method for detecting power according to claim 3, wherein the calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile comprises:
under the condition that the half shaft and the differential are disconnected and the rotary drum is started, the rotary drum drives the wheel to rotate, the wheel drives the half shaft to rotate, and fifth power of the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point in the preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the fifth power is the transmission loss power of the half shaft and the wheel;
and obtaining the transmission loss power of the differential corresponding to each speed point in the preset speed interval according to the fifth power and the fourth power.
5. The method for detecting power according to claim 4, wherein the calculating of the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile comprises:
under the condition that the half shaft is disconnected from the wheel and the rotary drum is started, the wheel is driven to rotate by the rotary drum, and in the preset speed interval, sixth power of the rotating speed and the torque input by the rotary drum corresponding to each vehicle speed point in the preset speed interval is obtained by adjusting the force and the rotating speed of the rotary drum, wherein the sixth power is transmission loss power of parasitic resistance of the wheel and the brake disc;
and obtaining the transmission loss power of the half shaft corresponding to each speed point in the preset speed interval according to the sixth power and the fifth power.
6. The method for detecting power according to claim 5, wherein the calculating of the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile comprises:
under the condition that the brake disc is dismantled and the rotary drum is started, the rotary drum drives the wheel to rotate, and seventh power of the rotating speed and the torque input by the rotary drum corresponding to each speed point in the preset speed interval is obtained in the preset speed interval by adjusting the force and the rotating speed of the rotary drum, wherein the seventh power is the friction loss power of the wheel;
and obtaining the parasitic loss power of the brake disc corresponding to each speed point in the preset speed interval according to the seventh power and the sixth power.
7. An apparatus for power detection, comprising:
the system comprises an acquisition module, a transmission module and a control module, wherein the acquisition module is used for respectively acquiring first power input into a gearbox by an engine in a preset speed interval and second power output to an automobile by a transfer drum in a rotary drum platform;
the power calculation module is used for obtaining the transmission loss power of the system according to the first power and the second power;
the power detection module is used for calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile;
wherein, the calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile comprises: disconnecting a transmission shaft at the output end of the gearbox, stopping the engine, and starting the rotary drum, wherein the rotary drum drives wheels to rotate, the wheels drive a half shaft, a differential mechanism and the transmission shaft to rotate, and third power of the rotation speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotation speed of the rotary drum, wherein the third power is the transmission loss power of the transmission shaft, the differential mechanism, the half shaft and the wheels; and obtaining the transmission loss power corresponding to each speed point in the preset speed interval according to the operand difference between the transmission loss power of the system and the third power.
8. The apparatus for power detection as claimed in claim 7, wherein the obtaining module comprises:
and the acquisition unit is used for placing the gearbox in a traveling D gear, inputting a preset torque at the rotary drum, acquiring the input torque and the rotating speed of the gearbox through a Controller Area Network (CAN) signal, and calculating to obtain the first power.
9. A system for power detection, comprising: the system comprises a rotary drum platform and an automobile, wherein when the automobile is arranged on the rotary drum platform, first power input into a gearbox by an engine of the automobile in a preset speed interval and second power input into or output from a rotary drum in the rotary drum platform to the automobile are respectively obtained; obtaining transmission loss power of a system according to the first power and the second power; calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test conditions of each transmission component preset in the automobile;
wherein, the calculating the transmission loss power of each transmission component according to the transmission loss power of the system respectively according to the test condition of each transmission component preset in the automobile comprises: disconnecting a transmission shaft at the output end of the gearbox, stopping the engine, and starting the rotary drum, wherein the rotary drum drives wheels to rotate, the wheels drive a half shaft, a differential mechanism and the transmission shaft to rotate, and third power of the rotation speed and the torque input by the rotary drum corresponding to each speed point in a preset speed interval is obtained in the preset speed interval by adjusting the force and the rotation speed of the rotary drum, wherein the third power is the transmission loss power of the transmission shaft, the differential mechanism, the half shaft and the wheels; and obtaining the transmission loss power corresponding to each speed point in the preset speed interval according to the operand difference between the transmission loss power of the system and the third power.
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| CN111351601A (en) * | 2020-04-28 | 2020-06-30 | 浙江睿驰同利汽车电子有限公司 | Method and device for testing torque of high-speed motor |
| CN112051073B (en) * | 2020-08-27 | 2022-03-22 | 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 |
| CN117232700B (en) * | 2023-10-31 | 2024-06-14 | 中国重汽集团济南动力有限公司 | Method, device, equipment and medium for testing power loss of electric drive bridge |
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| CN101846585A (en) * | 2010-05-21 | 2010-09-29 | 重庆长安汽车股份有限公司 | Test method of automobile transmission system efficiency |
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| CN101846585A (en) * | 2010-05-21 | 2010-09-29 | 重庆长安汽车股份有限公司 | Test method of automobile transmission system efficiency |
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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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