CN116086560A - Multi-factor coupled engine universal oil consumption correction method and system - Google Patents
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Abstract
The invention provides a method and a system for correcting universal oil consumption of an engine under multi-factor coupling, which belong to the technical field of engine bench tests, and comprise the following steps: acquiring universal oil consumption data of the engine on different racks and without carrying or with different functional parts; performing target rotating speed and torque interpolation processing on the universal oil consumption data; performing difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried; and the universal oil consumption of the engine measured by the rack is overlapped with the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts to obtain universal oil consumption data of the engine with the specified functional parts on the specified rack. The invention can eliminate the influence of the oil consumption precision of the rack, and can also find out the influence of different functional components on the universal oil consumption of the engine by a difference value method, thereby avoiding the secondary performance development caused by the misjudgment of the engine performance due to oil consumption deviation.
Description
Technical Field
The invention belongs to the technical field of engine bench tests, and particularly relates to a method and a system for correcting universal oil consumption of an engine under multi-factor coupling.
Background
The engine test bed is a physical performance testing instrument used in the basic subject field of engineering and technical science. In the current engine rack performance development process, the rack resource allocation and development progress improvement are considered, and a plurality of racks are generally adopted for parallel development. In the case of bench test profiling of functional components, there may be different functional components tested on different benches. Considering the oil consumption precision deviation of different benches and the influence on the oil consumption of the engine after different functional components are coupled, the universal oil consumption error of the engine is larger under the condition, and the oil consumption influence factors are difficult to be completely consistent.
If the bare engine of the engine is calibrated on an engine test bench A, the tail gas treatment system with the functional component is calibrated on an engine test bench B, and the functional component is selected on an engine test bench C, so that the influence of the tail gas treatment system and the different superchargers on the oil consumption can not be avoided when the influence of the tail gas treatment system and the different superchargers on the oil consumption is considered because the functional component is not tested on the same bench, and the universal oil consumption deviation of the engine is overlarge.
Under the influence of multi-factor coupling, the engine universal oil consumption is not corrected, the rack error is eliminated, the accuracy of the engine universal oil consumption is greatly influenced, and the accuracy of the subsequent engine performance test, the whole vehicle performance test and the simulation analysis is greatly influenced.
Disclosure of Invention
The invention provides a method for correcting the universal oil consumption of an engine under multi-factor coupling, which can eliminate the influence of the oil consumption precision of a rack, and can also find out the influence of different functional parts on the universal oil consumption of the engine by a difference value method, unify the universal oil consumption of the engine to the state of the same influencing factor, greatly improve the accuracy of the universal oil consumption of the engine and avoid the secondary performance development caused by the misjudgment of the engine performance caused by oil consumption deviation.
The method comprises the following steps:
s1: acquiring universal oil consumption data of the engine on different racks and without carrying or with different functional parts;
s2: performing target rotating speed and torque interpolation processing on the universal oil consumption data;
s3: performing difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried;
s4: and the universal oil consumption of the engine measured by the rack is overlapped with the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts to obtain universal oil consumption data of the engine with the specified functional parts on the specified rack.
It should be further noted that, the step S1 further includes: obtaining universal oil consumption data of the engine on different racks as universal oil consumption original data A0 (x i ，y i ，z i ）、B0（x i ，y i ，z i ）、C0（x i ，y i ，z i ）；
The universal oil consumption data carrying different functional parts are universal oil consumption data measured by the same engine carrying or not carrying different functional parts on the same rack.
It should be further noted that the functional components in step S1 include an engine exhaust gas treatment device, or any functional component that affects engine fuel consumption, or an electronically controlled control strategy.
In step S2, the target rotation speed and torque interpolation is performed on the universal fuel consumption data;
and equally dividing the engine speed and the engine torque, and interpolating the specific oil consumption of the engine.
In step S2, the interpolation processing method is linear interpolation processing or nonlinear interpolation processing.
In the step S3, the difference value is calculated for the data after the arrangement, so as to obtain the universal fuel consumption difference value of the rack a, the rack B and the rack C, and the universal fuel consumption difference value of different functional components on the rack B.
In step S3, the method for calculating the universal fuel consumption difference between the rack a, the rack B and the rack C is as follows:
A0-B0（x i ，y i ，z i ）= A0（x i ，y i ，z i ）- B0（x i ，y i ，z i ）
A0-C0（x i ，y i ，z i ）= A0（x i ，y i ，z i ）- C0（x i ，y i ，z i ）。
it is further noted that the different functional components on the rack B have fuel consumption differences Be1-Be0 (x i ，y i ，z i ) The calculation method of (1) is as follows: be1-Be0 (x) i ，y i ，z i ）= Be1（x i ，y i ，z i ）- Be0（x i ，y i ，z i ）。
In step S4, the universal oil consumption of the engine measured on a certain rack is calculated to be different from the universal oil consumption of the engine measured on a different rack, and the universal oil consumption difference of different functional components is combined to be overlapped to obtain universal oil consumption data of the engine with the specified functional components on the specified rack.
The invention also provides a universal oil consumption correction system of the engine under multi-factor coupling, which comprises: the system comprises a universal oil consumption data acquisition module, a data processing module, a data calculation module and a data output module;
the universal oil consumption data acquisition module is used for acquiring universal oil consumption data of the engine on different racks and without carrying or carrying different functional parts;
the data processing module is used for carrying out target rotating speed and torque interpolation processing on the universal oil consumption data;
the data calculation module is used for carrying out difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried;
and the data output module is used for obtaining the universal oil consumption data of the engine with the specified functional parts on the specified rack by superposing the universal oil consumption of the engine measured by the rack and the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts.
From the above technical scheme, the invention has the following advantages:
according to the method and the system for correcting the universal oil consumption of the engine under the multi-factor coupling, provided by the invention, the influence of different functional components on the universal oil consumption of the engine is obtained through the difference method, so that the influence of the oil consumption precision of a rack can be eliminated, the universal oil consumption of the engine is unified to the same influence factor state, the accuracy of the universal oil consumption of the engine is improved, and the secondary performance development caused by the misjudgment of the engine performance caused by oil consumption deviation is avoided.
The universal oil consumption data obtained by the method can eliminate the influence of the rack and different functional components on the universal oil consumption of the engine, so that the universal oil consumption data measured in different states are unified into a specified state, and accurate and reliable universal oil consumption data is provided for subsequent simulation and test analysis.
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In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for correcting universal fuel consumption of an engine under multi-factor coupling;
FIG. 2 is a graph of original universal fuel consumption data of an engine measured by a rack A;
FIG. 3 is a graph of the universal fuel consumption data of FIG. 2 after interpolation of the universal fuel consumption data;
FIG. 4 is a graph of the difference in fuel consumption between the A and C frames;
FIG. 5 is a graph of the difference in fuel consumption of the exhaust treatment system with the functional components measured by the B-stage;
FIG. 6 is a graph of modified engine universal data specifying that rack C carries an exhaust treatment system;
fig. 7 is a schematic diagram of a multi-factor coupled engine universal fuel consumption correction system.
Detailed Description
The invention provides a method for correcting universal oil consumption of an engine under multi-factor coupling, which aims to solve the problem that the universal oil consumption of the engine is overlarge after the existing bench factors and functional component factors are coupled. The engine universal oil consumption correction method under multi-factor coupling provided by the invention has the technology of a hardware level and the technology of a software level. The hardware level used by the engine universal oil consumption correction method comprises a plurality of racks, sensors, intelligent chips, cloud computing, distributed storage, big data processing technology, operation/interaction system, electromechanical integration technology and the like. Software technology used by engine universal fuel consumption correction methods mainly includes, but is not limited to, object-oriented programming languages such as Java, smalltalk, C ++, and conventional procedural programming languages such as "C" or similar programming languages.
The universal oil consumption correction method of the engine utilizes the technologies of linear interpolation, nonlinear interpolation and the like, and realizes universal oil consumption detection and correction of the engine by establishing a calculation model of universal oil consumption data and utilizing the technologies of sensor monitoring, data transmission and the like, thereby avoiding secondary performance development caused by misjudgment of engine performance due to oil consumption deviation.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, a flowchart and an engine universal data diagram of an engine universal fuel consumption correction method under multi-factor coupling in an embodiment are shown, and the method includes:
s1: and acquiring universal oil consumption data of the engine on different racks without carrying or with different functional parts.
In this embodiment, fig. 2 illustrates the step S1 of obtaining the universal fuel consumption data of an engine on different racks, the racks of the present invention relate to the racks a, B, and C, and the same engine is arranged on the racks a, B, and CThe original data of the universal oil consumption measured by the frame C is A0 (x i ，y i ，z i ). Wherein x is i Representing engine speed (rpm), y i Representing engine torque (Nm), z i Representing the engine at the rotational speed x i And torque y i The specific fuel consumption g/kWh of the engine. B0 (x) i ，y i ，z i ）、C0（x i ，y i ，z i ) Is the same format data, except that the data values are different.
Similarly, the universal oil consumption data carrying different functional components is the universal oil consumption data of the same engine carrying different functional components e or not carrying different functional components e on the same rack.
For example, the universal fuel consumption data measured on the B-stage and respectively carrying or not carrying the engine tail gas treatment system is Be1 (x) i ，y i ，z i ）、Be0（x i ，y i ，z i ). The data-generic graph format is the same as that of fig. 2, except that the data values are different.
It should be noted that the functional component in step S1 may be an engine exhaust gas treatment system, or any functional component or electronic control strategy that affects engine fuel consumption, such as a fan-based control strategy, an air compressor control strategy, an air conditioner compressor control strategy, a combustion control strategy, an exhaust emission control strategy, etc.
The universal specific fuel consumption data points shown in fig. 2 are in a non-regular state, and the torque value non-integer state of the universal specific fuel consumption data points of the engine can be measured based on the rack A.
S2: and carrying out target rotating speed and torque interpolation processing on the universal oil consumption data.
In this embodiment, as shown in fig. 3, in order to facilitate the next calculation of the difference, step S2 performs interpolation and arrangement of the target rotation speed and torque on the universal fuel consumption data, equally divides the engine rotation speed and the engine torque, performs interpolation of the specific fuel consumption of the engine, such as equally dividing the engine rotation speed by 100rpm, and equally dividing the engine torque by 50 Nm. The interpolation method is not limited to linear interpolation or nonlinear interpolation.
The rotation speed and torque equally dividing interval in step S2 are not limited, and the rotation speed may be equally divided by 50rpm, or the torque may be equally divided by 100 Nm. The interpolation method is not limited, and is not limited to linear interpolation or nonlinear interpolation.
S3: and carrying out difference calculation on the processed data to obtain the universal oil consumption difference value of different racks and the universal oil consumption difference value without carrying or carrying different functional parts.
Specifically, as shown in FIG. 4, the universal fuel consumption A0 (x i ，y i ，z i ) And C0 (x) i ，y i ，z i ) The method for calculating the universal oil consumption difference value of the engine on the rack A and the rack C respectively comprises the following steps:
A0-C0（x i ，y i ，z i ）= A0（x i ，y i ，z i ）- C0（x i ，y i ，z i ）。
likewise, if the oil consumption difference between the rack a and the rack B or between the rack B and the rack C is required, the same calculation method is also described above, and detailed calculation methods are not described herein.
FIG. 5 shows whether the same engine carrying the functional components on rack B has fuel consumption differences Be1-Be0 (x) i ，y i ，z i ) The method is considered as the influence of the tail gas treatment system of the functional part on the universal oil consumption of the engine, and comprises the following steps of:
Be1-Be0（x i ，y i ，z i ）= Be1（x i ，y i ，z i ）- Be0（x i ，y i ，z i ）
it is understood that the embodiment of the present invention uses the exhaust gas treatment system as an example of the functional components, and whether the functional components are carried may be plural, and any functional components that affect the fuel consumption of the engine or an electronically controlled control strategy, such as a fan, an air compressor, an air conditioner compressor, a combustion control strategy, an emission control strategy, etc. may be included.
S4: and the universal oil consumption of the engine measured by the rack is overlapped with the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts to obtain universal oil consumption data of the engine with the specified functional parts on the specified rack.
In step S4, the universal oil consumption of the engine measured by a certain rack is overlapped with the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional components, so as to obtain universal oil consumption data of the engine with the specified functional components on the specified rack.
Specifically, as shown in fig. 6, engine raw universal fuel consumption data A0 (x i ，y i ，z i ) The fuel consumption difference A0-C0 (x) i ，y i ，z i ) Or various functional components with fuel consumption difference Be1-Be0 (x i ，y i ，z i ) Accumulating the phases to obtain universal fuel consumption data Ce1 of the engine with the specified functional component e on the specified rack C ‘ （x i ，y i ，z i ）。
The calculation method comprises the following steps: ce1 ‘ （x i ，y i ，z i ）=A0（x i ，y i ，z i ）- A0-C0（x i ，y i ，z i ）+ Be1-Be0（x i ，y i ，z i ）。
It can be understood that the invention corrects the universal oil consumption data of the tail gas treatment system carried by the engine on the formulated bench C by utilizing the oil consumption difference value of the bench A, the oil consumption difference value of the bench C and the oil consumption difference value of whether the tail gas is carried for aftertreatment acquired on the bench B.
The same method can be adopted to obtain the universal oil consumption data of the rack D and the rack F carrying different functional parts. Therefore, the universal fuel consumption correction method can be applied to universal Nox, exhaust temperature and other indexes which can be counted in a universal mode.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following is an embodiment of a universal oil consumption correction system for an engine under multi-factor coupling provided by the embodiment of the present disclosure, where the system belongs to the same inventive concept as the universal oil consumption correction method for an engine under multi-factor coupling of the above embodiments, and details of the embodiment of the universal oil consumption correction system for an engine under multi-factor coupling, which are not described in detail, may refer to the embodiment of the universal oil consumption correction method for an engine under multi-factor coupling.
As shown in fig. 7, the system includes: the system comprises a universal oil consumption data acquisition module, a data processing module, a data calculation module and a data output module;
the universal oil consumption data acquisition module is used for acquiring universal oil consumption data of the engine on different racks and without carrying or carrying different functional parts;
the data processing module is used for carrying out target rotating speed and torque interpolation processing on the universal oil consumption data;
the data calculation module is used for carrying out difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried;
and the data output module is used for obtaining the universal oil consumption data of the engine with the specified functional parts on the specified rack by superposing the universal oil consumption of the engine measured by the rack and the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts.
The universal oil consumption correction system for the engine under multi-factor coupling can eliminate the influence of the oil consumption precision of the rack, unifies universal oil consumption of the engine to the same influence factor state, improves the accuracy of universal oil consumption of the engine, and avoids secondary performance development caused by misjudgment of engine performance caused by oil consumption deviation.
The units and algorithm steps of each example described in the embodiments disclosed in the engine universal fuel consumption correction system under multi-factor coupling provided by the embodiments of the disclosure can be implemented in electronic hardware, computer software or a combination of the two, and in order to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functions in the above description. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The multifactor coupled engine universal fuel consumption correction system of the present disclosure is the units and algorithm steps of each example described in connection with the embodiments disclosed herein, and can be implemented in electronic hardware, computer software, or a combination of both, and to clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The universal oil consumption correction method for the engine under the multi-factor coupling is characterized by comprising the following steps of:
s1: acquiring universal oil consumption data of the engine on different racks and without carrying or with different functional parts;
s2: performing target rotating speed and torque interpolation processing on the universal oil consumption data;
s3: performing difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried;
s4: and the universal oil consumption of the engine measured by the rack is overlapped with the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts to obtain universal oil consumption data of the engine with the specified functional parts on the specified rack.
2. The method for correcting universal fuel consumption of an engine under multi-factor coupling according to claim 1, wherein the step S1 further comprises: obtaining universal oil consumption data of the engine on different racks as universal oil consumption original data A0 (x i ，y i ，z i ）、B0（x i ，y i ，z i ）、C0（x i ，y i ，z i ）；
The universal oil consumption data carrying different functional parts are universal oil consumption data measured by the same engine carrying or not carrying different functional parts on the same rack.
3. The multi-factor coupled engine universal fuel consumption correction method according to claim 1, wherein the functional components in step S1 comprise an engine exhaust gas treatment device, or any functional component affecting engine fuel consumption, or an electronically controlled control strategy.
4. The method for correcting universal fuel consumption of the engine under multi-factor coupling according to claim 1, wherein in step S2, target rotation speed and torque interpolation processing is performed on universal fuel consumption data;
and equally dividing the engine speed and the engine torque, and interpolating the specific oil consumption of the engine.
5. The method for correcting universal fuel consumption of engine under multi-factor coupling according to claim 1, wherein in step S2, the interpolation processing mode is linear interpolation processing or nonlinear interpolation processing.
6. The method for correcting the universal fuel consumption of the engine under the multi-factor coupling according to claim 1, wherein in the step S3, the difference value is calculated on the data after the arrangement, so as to obtain the universal fuel consumption difference value of the rack a, the rack B and the rack C and the universal fuel consumption difference value of different functional components on the rack B respectively.
7. The method for correcting universal fuel consumption of an engine under multi-factor coupling according to claim 6, wherein in step S3, the method for calculating universal fuel consumption difference between rack a, rack B and rack C is as follows:
A0-B0（x i ，y i ，z i ）= A0（x i ，y i ，z i ）- B0（x i ，y i ，z i ）
A0-C0（x i ，y i ，z i ）= A0（x i ，y i ，z i ）- C0（x i ，y i ，z i ）。
8. the multi-factor coupled engine universal fuel consumption correction method as claimed in claim 6, wherein the different functional components on the rack B have universal fuel consumption differences Be1-Be0 (x i ，y i ，z i ) The calculation method of (1) is as follows:
Be1-Be0（x i ，y i ，z i ）= Be1（x i ，y i ，z i ）- Be0（x i ，y i ，z i ）。
9. the method for correcting universal oil consumption of an engine under multi-factor coupling according to claim 7, wherein in step S4, universal oil consumption of the engine measured on a certain rack is calculated based on universal oil consumption of the engine measured on a different rack, and universal oil consumption difference values of different functional components are combined to be overlapped to obtain universal oil consumption data of the engine with the specified functional components on the specified rack.
10. An engine universal oil consumption correction system under multi-factor coupling, which is characterized in that the system adopts the engine universal oil consumption correction method under multi-factor coupling as claimed in any one of claims 1 to 9; the system comprises: the system comprises a universal oil consumption data acquisition module, a data processing module, a data calculation module and a data output module;
the universal oil consumption data acquisition module is used for acquiring universal oil consumption data of the engine on different racks and without carrying or carrying different functional parts;
the data processing module is used for carrying out target rotating speed and torque interpolation processing on the universal oil consumption data;
the data calculation module is used for carrying out difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences of different functional components which are not carried or carried;
and the data output module is used for obtaining the universal oil consumption data of the engine with the specified functional parts on the specified rack by superposing the universal oil consumption of the engine measured by the rack and the universal oil consumption difference of different engine racks or the universal oil consumption difference of different functional parts.
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