CN110686898B - Detection method and detection system for engine ECU misloading - Google Patents
Detection method and detection system for engine ECU misloading Download PDFInfo
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- CN110686898B CN110686898B CN201910867361.9A CN201910867361A CN110686898B CN 110686898 B CN110686898 B CN 110686898B CN 201910867361 A CN201910867361 A CN 201910867361A CN 110686898 B CN110686898 B CN 110686898B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- G—PHYSICS
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/13—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
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Abstract
The invention discloses a detection method and a detection system for wrong installation of an engine ECU (electronic control unit). in the detection method for wrong installation of the engine ECU, current parameters of an engine are obtained; calculating the current power of the engine according to the current parameters of the engine; comparing the current power with the rated power; and finally, outputting the current state of the engine ECU according to the comparison result. The engine ECU misloading detection method keeps the original structure of the engine, and detects whether the engine ECU is misloaded or not through communication with the engine ECU, so that the detection cost is effectively reduced; meanwhile, by checking the rated power of the engine, whether the engine ECU is installed wrongly or not can be judged quickly and accurately, so that the detection precision is improved, and the efficiency of engine fault removal is improved; in addition, the current state of the engine ECU can be effectively mastered by a user or a detector through outputting the current state of the engine ECU, so that the use experience of the user is effectively improved.
Description
Technical Field
The invention relates to the technical field of automobile detection, in particular to a method for detecting wrong installation of an engine ECU (electronic control unit). The invention also relates to a detection system for the wrong installation of the engine ECU.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
The engine provides power for the running of the vehicle, and the output power of the engine is controlled by the engine ECU, namely, the rated power of the engine is set by the engine ECU, and if the data of the engine ECU is different, the rated power of the engine is different under the same hardware condition.
In the production process, the phenomenon of engine ECU misloading can appear because of reasons such as operator negligence, and when the engine ECU misloading appears, can lead to the engine rated power who produces in the same batch to have the difference, can appear phenomenon such as power deficiency in the use, can't effective discharge trouble to make user's use experience reduce.
Disclosure of Invention
The invention aims to at least solve the problem of wrong installation of an engine ECU. The purpose is realized by the following technical scheme:
the invention provides a method for detecting the misloading of the engine ECU, which comprises the following steps:
acquiring current parameters of an engine;
calculating the current power of the engine according to the current parameters of the engine;
comparing the current power with the rated power;
and outputting the current state of the engine ECU according to the comparison result.
In some embodiments of the invention, the current parameter of the engine is the external characteristic oil mass at the rated speed of the engine.
In some embodiments of the present invention, when calculating the current power, further comprising the steps of:
obtaining theoretical output torque corresponding to the external characteristic oil quantity according to the torque oil quantity conversion curve;
obtaining loss torque at rated rotation speed;
obtaining actual output torque according to the theoretical output torque and the loss torque;
and obtaining the current power of the engine according to the actual output torque.
In addition, the method for detecting the engine ECU misloading according to the present invention may further have the following additional technical features:
in some embodiments of the invention, the actual output torque is calculated by the following equation:
T0＝T1-T2
where T0 is the actual output torque, T1 is the theoretical output torque, and T2 is the loss torque.
In some embodiments of the invention, the current power of the engine is calculated by the following equation:
P0＝(N*T0)/9550
wherein, P0 is the current power, N is the rated speed, and T0 is the actual output torque.
In some embodiments of the present invention, when comparing the current power and the rated power, the method further comprises the following steps:
making a difference between the rated power and the current power;
taking an absolute value of a difference value between the rated power and the current power;
and comparing the absolute value with a preset range, and judging whether the absolute value is in the preset range.
In some embodiments of the present invention, when outputting the current state of the engine ECU according to the comparison result, further comprising the steps of:
when the absolute value is in a preset range, outputting the normal state of an engine ECU;
when the absolute value exceeds a preset range, an erroneous state of the engine ECU is output.
In some embodiments of the present invention, the predetermined range is [0, 2% P ], where P is the rated power.
In some embodiments of the present invention, the method further comprises the steps of: the output current state of the engine ECU is saved.
A second aspect of the present invention provides an engine ECU misloading detection system for implementing the engine ECU misloading detection method described above, the engine ECU misloading detection system including:
the communication unit is in communication connection with an engine ECU so as to obtain current parameters of the engine;
the control unit is electrically connected with the communication unit and obtains the current power of the engine according to the current parameters of the engine, the current state of the engine ECU is obtained by comparing the current power with the rated power, and the current state of the engine ECU is output;
and the storage unit prestores the rated power and the rated rotating speed of the engine and stores the output current state of the engine ECU.
Compared with the prior art, the detection method and the detection system for the engine ECU misloading have the following beneficial effects:
1. the original structure of the engine is kept, and whether the engine ECU is wrongly installed or not is detected through communication with the engine ECU, so that the detection cost is effectively reduced.
2. By checking the rated power of the engine, whether the engine ECU is installed wrongly or not can be judged quickly and accurately, so that the detection precision is improved, and the efficiency of engine fault removal is improved.
3. By outputting the current state of the engine ECU, a user or a detector can effectively master the current state of the engine ECU, so that the use experience of the user is effectively improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically shows a flowchart of a detection method of engine ECU misloading according to an embodiment of the present invention;
fig. 2 schematically shows a block diagram of a detection system of engine ECU misloading according to an embodiment of the present invention.
The reference numbers are as follows:
10 is an engine ECU;
20 is a controller;
a control unit 21, a communication unit 22, and a storage unit 23.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 and 2, according to an embodiment of the present invention, the present invention proposes a misload detection method of engine ECU10, the misload detection method of engine ECU10 comprising the steps of:
first, current parameters of the engine are obtained. Specifically, the current parameter of the engine is the external characteristic oil amount when the engine is at a rated speed. When the detection is performed, the engine is started so that the engine runs at the rated rotation speed, and the control unit 21 sends a request message to the engine ECU through the communication unit 23 so as to acquire the current parameters of the engine. The communication unit 23 is in communication connection with the engine ECU10 to obtain the current parameters of the engine, and other acquisition elements such as sensors are not needed, so that the structure of the engine is not changed, and the detection cost is effectively reduced.
Further, the current power of the engine is calculated based on the current parameters of the engine. Specifically, theoretical output torque corresponding to the external characteristic oil quantity is obtained according to the torque oil quantity conversion curve, loss torque at a rated rotating speed is obtained, actual output torque is obtained according to the theoretical output torque and the loss torque, and the current power of the engine is obtained according to the actual output torque.
More specifically, the control unit 21 reads that the current parameter of the engine is the external characteristic oil amount when the engine is at the rated rotation speed N, the control unit 21 converts the external characteristic oil amount into the theoretical output torque T1 of the engine according to the torque-oil amount conversion curve, the control unit 21 obtains the loss torque T2 corresponding to the rated rotation speed by looking up a table, the control unit 21 obtains the actual output torque T0 of the engine by subtracting the theoretical output torque T1 from the loss torque T2, and the control unit 21 calculates the current power P0 of the engine according to the mathematical relationship among the rated rotation speed N, the actual output torque T0 of the engine and the power of the engine, wherein the current power P0 of the engine corresponds to the rated rotation speed N of the engine. The control unit 21 can effectively reduce interference factors in the calculation process by calculating the current power of the engine at the rated rotation speed through the external characteristic oil mass, so that the calculation result is more accurate and reliable, and the judgment precision of whether the engine ECU10 is installed mistakenly is improved.
Specifically, the actual output torque is calculated by the following equation:
T0＝T1-T2 (1)
where T0 is the actual output torque, T1 is the theoretical output torque, and T2 is the loss torque.
Specifically, the current power of the engine is calculated by the following formula:
P0＝(N*T0)/9550 (2)
wherein, P0 is the current power, N is the rated speed, and T0 is the actual output torque.
The current power of the engine at the rated rotating speed can be quickly and accurately obtained through the formula (1) and the formula (2), the whole calculation process is simple, the calculation amount of the control unit 21 is effectively reduced, the calculation speed of the control unit 21 is improved, and the corresponding speed of the control unit 21 is improved.
Further, the current power is compared with the rated power. Specifically, the rated power is differentiated from the current power; taking an absolute value of a difference value between the rated power and the current power; and comparing the absolute value with a preset range, and judging whether the absolute value is in the preset range.
More specifically, the current power of the engine at the rated speed should theoretically be the rated power, and the control unit 21 determines whether the current power of the engine is the rated power of the engine by comparing the rated power with the calculated current power of the engine at the rated speed, and in order to ensure the accuracy of the detection, in the memory unit 22, a preset range is stored, the control unit 21 takes the difference between the rated power and the current power of the engine, and removing the absolute value of the difference, comparing the absolute value with a preset range, when the absolute value is in the preset range, the engine ECU10 is judged to be in a normal state, and when the absolute value is out of the preset range, the engine ECU10 is judged to be in an erroneous state, therefore, whether the engine ECU10 is mistakenly installed or not can be judged quickly and effectively, the detection time is shortened, and the detection efficiency is effectively improved.
It should be noted that the preset range is [0, 2% P ], where P is the rated power, that is, when the fluctuation range of the current power of the engine is less than or equal to 2% of the rated power, it is determined that the engine ECU10 is not in error, and when the current power of the engine is greater than 2% of the rated power, it is determined that the engine ECU10 is in error.
Further, the current state of the engine ECU10 is output according to the comparison result. Specifically, control unit 21 transmits the result of determination to engine ECU10 through communication unit 23, and engine ECU10 outputs the result of determination, thereby enabling the inspector to quickly and efficiently grasp the state of engine ECU10, and when the result of determination is that the engine state is normal, engine ECU10 is not processed, and when the result of determination is that engine ECU10 is erroneous, engine ECU10 is stopped for maintenance, thereby eliminating the malfunction.
Further, when the control unit 21 outputs the determination result to the engine ECU10, the storage unit 22 saves the output current state of the engine ECU10 until the next cycle. Specifically, the storage unit 22 can perform data transmission with an external device, so that a stored result can be exported, analysis and comparison of data in a detection process are facilitated, and detection and judgment efficiency is improved.
A second aspect of the present invention provides a mis-assembly detection system of an engine ECU10, the mis-assembly detection system of an engine ECU10 being adapted to implement the mis-assembly detection method of an engine ECU10 as described above, the mis-assembly detection system of an engine ECU10 comprising:
a communication unit 23, the communication unit 23 being communicatively connected with the engine ECU10 so as to obtain current parameters of the engine;
the control unit 21, the control unit 21 is electrically connected with the communication unit 23, the control unit 21 obtains the current power of the engine according to the current parameters of the engine, obtains the current state of the engine ECU10 by comparing the current power with the rated power, and outputs the current state of the engine ECU 10;
and a storage unit 22 for storing the rated power and the rated speed of the engine in the storage unit 22 and storing the output current state of the engine ECU 10.
It should be noted that the communication unit 23, the control unit 21, and the storage unit 22 may be integrated to form the controller 20, so that the volume of the engine ECU10 mis-assembling detection system can be effectively reduced, and the installation space can be saved.
Compared with the prior art, the detection method and the detection system for the engine ECU misloading have the following beneficial effects:
1. the original structure of the engine is kept, and whether the engine ECU is wrongly installed or not is detected through communication with the engine ECU, so that the detection cost is effectively reduced.
2. By checking the rated power of the engine, whether the engine ECU is installed wrongly or not can be judged quickly and accurately, so that the detection precision is improved, and the efficiency of engine fault removal is improved.
3. By outputting the current state of the engine ECU, a user or a detector can effectively master the current state of the engine ECU, so that the use experience of the user is effectively improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for detecting engine ECU misloading is characterized by comprising the following steps:
acquiring current parameters of an engine;
calculating the current power of the engine according to the current parameters of the engine;
comparing the current power with the rated power;
outputting the current state of the engine ECU according to the comparison result;
the current parameter of the engine is the external characteristic oil mass when the engine is at the rated rotating speed;
when calculating the current power, the method further comprises the following steps:
obtaining theoretical output torque corresponding to the external characteristic oil quantity according to the torque oil quantity conversion curve;
obtaining loss torque at rated rotation speed;
obtaining actual output torque according to the theoretical output torque and the loss torque;
and obtaining the current power of the engine according to the actual output torque.
2. The engine ECU misloading detection method according to claim 1, characterized in that the actual output torque is calculated by the following formula:
T0＝T1-T2
where T0 is the actual output torque, T1 is the theoretical output torque, and T2 is the loss torque.
3. The method of detecting an engine ECU misloading according to claim 1, characterized in that the current power of the engine is calculated by the following formula:
P0＝(N*T0)/9550
wherein, P0 is the current power, N is the rated speed, and T0 is the actual output torque.
4. The method of detecting an engine ECU misloading according to claim 1, characterized by further comprising the steps of, when comparing the current power and the rated power:
making a difference between the rated power and the current power;
taking an absolute value of a difference value between the rated power and the current power;
and comparing the absolute value with a preset range, and judging whether the absolute value is in the preset range.
5. The method of detecting an engine ECU misloading according to claim 4, characterized by further comprising, when outputting the current state of the engine ECU based on the comparison result, the steps of:
when the absolute value is in a preset range, outputting the normal state of an engine ECU;
when the absolute value exceeds a preset range, an erroneous state of the engine ECU is output.
6. The method of detecting an engine ECU misloading according to claim 4 or 5, characterized in that the preset range is [0, 2% P ], where P is a rated power.
7. The engine ECU misloading detection method according to any one of claims 1 to 5, characterized by further comprising the steps of: the output current state of the engine ECU is saved.
8. An engine ECU misloading detection system for implementing the engine ECU misloading detection method according to any one of claims 1 to 7, characterized by comprising:
the communication unit is in communication connection with an engine ECU so as to obtain current parameters of the engine;
the control unit is electrically connected with the communication unit and obtains the current power of the engine according to the current parameters of the engine, the current state of the engine ECU is obtained by comparing the current power with the rated power, and the current state of the engine ECU is output;
and the storage unit prestores the rated power and the rated rotating speed of the engine and stores the output current state of the engine ECU.
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