CN116086560B - Multi-factor coupled engine universal oil consumption correction method and system - Google Patents

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

A method and system for universal engine fuel consumption correction under multi-factor coupling

Technical field

The invention belongs to the technical field of engine bench testing, and specifically relates to an engine universal fuel consumption correction method and system under multi-factor coupling.

Background technique

The engine test bench is a physical performance testing instrument used in the basic disciplines of engineering and technical science. In the current engine bench performance development process, considering bench resource allocation and improving development progress, multiple benches are generally developed in parallel. When selecting functional component bench tests, different functional components may be tested on different benches. Considering the fuel consumption accuracy deviation of different benches and the impact of the coupling of different functional components on the engine fuel consumption, this situation results in a large error in the engine's universal fuel consumption, making it difficult to form a completely consistent comparison of factors affecting fuel consumption.

For example, the bare metal engine is calibrated on engine test bench A, the exhaust gas treatment system with functional components is calibrated on engine test bench B, and the selection of superchargers with different functional components is on engine test bench C. Since they are not tested on the same bench, consider The impact of the exhaust gas treatment system and different superchargers on fuel consumption cannot be circumvented by the impact of the engine bench on fuel consumption, resulting in excessive deviation in the overall engine fuel consumption.

Under the influence of multi-factor coupling, without correcting the engine components and eliminating bench errors, it greatly affects the accuracy of the engine's fuel consumption, and has a negative impact on the accuracy of subsequent engine performance tests, vehicle performance tests and simulation analyses. had a huge impact.

Contents of the invention

The present invention provides a method for correcting engine universal fuel consumption under multi-factor coupling. The method can eliminate the influence of bench fuel consumption accuracy. At the same time, the influence of different functional components on engine universal fuel consumption can be found out through the difference method, and the engine The universal fuel consumption is unified into the same influencing factor state, which greatly improves the accuracy of the engine's universal fuel consumption and avoids secondary performance development caused by misjudgment of engine performance caused by fuel consumption deviation.

Methods include:

S1: Obtain the universal fuel consumption data of the engine on different benches and without or with different functional components;

S2: Perform target speed and torque interpolation processing on the universal fuel consumption data;

S3: Perform difference calculation on the processed data to obtain the universal fuel consumption difference of different benches and the universal fuel consumption difference of not carrying or carrying different functional components;

S4: The universal fuel consumption of the engine measured on the bench is superimposed with the universal fuel consumption difference of different engine benches or the universal fuel consumption difference of different functional components to obtain the universal fuel consumption data of the engine with specified functional components on the designated bench. .

It should be further noted that the step S1 also includes: obtaining the universal fuel consumption data of the engine on different benches, which is the universal fuel consumption raw data A0 (x _i , y _i , z _i ), B0 (x _i , y _i , z _i ), C0 (x _i , y _i , z _i );

The fuel consumption data of Wanwan with different functional components are the fuel consumption data of Wanwan measured by the same engine on the same bench with or without different functional components.

It should be further noted that the functional components in step S1 include engine exhaust gas treatment equipment, or any functional components that affect engine fuel consumption, or electronic control strategies.

It should be further explained that in step S2, the target speed and torque interpolation processing is performed on the Wanyou fuel consumption data;

The engine speed and engine torque are divided into equal parts, and the engine specific fuel consumption is also interpolated.

It should be further noted that in step S2, the interpolation processing method is linear interpolation processing or nonlinear interpolation processing.

It should be further noted that in step S3, a difference calculation is performed on the sorted data to obtain the universal fuel consumption difference of platform A, platform B, and platform C, as well as the differences of different functional components on platform B. There is a difference in fuel consumption.

It should be further explained that in step S3, the calculation method of the universal fuel consumption difference between platform A, platform B, and platform C is:

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 should be further explained that the calculation method of the universal fuel consumption difference Be1-Be0 (x _i , y _i , z _i ) of different functional components on the platform B is: Be1-Be0 (x _i , y _i , z _i ) = Be1 (x _i , y _i , z _i ) - Be0 (x _i , y _i , z _i ).

It should be further explained that in step S4, the difference between the universal fuel consumption of the engine measured on a certain bench and the universal fuel consumption of the engine measured on different benches is calculated, and the difference in universal fuel consumption of different functional components is combined and superimposed. , obtain the universal fuel consumption data of the engine with specified functional components on the specified bench.

The invention also provides an engine universal fuel consumption correction system under multi-factor coupling. The system includes: a universal fuel consumption data acquisition module, a data processing module, a data calculation module and a data output module;

Wanyou fuel consumption data acquisition module is used to obtain Wanyou fuel consumption data of engines on different benches and without or with different functional components;

A data processing module used to perform target speed and torque interpolation processing on the universal fuel consumption data;

The data calculation module is used to perform difference calculation on the processed data to obtain the universal fuel consumption difference of different benches and the universal fuel consumption difference of not carrying or carrying different functional components;

The data output module is used to superimpose the universal fuel consumption of the engine measured on the bench with the difference in universal fuel consumption of different engine benches or the difference in universal fuel consumption of different functional components to obtain the fuel consumption of the engine with specified functional components on the specified bench. All fuel consumption data.

It can be seen from the above technical solutions that the present invention has the following advantages:

The engine universal fuel consumption correction method and system under multi-factor coupling provided by the present invention use the difference method to find out the impact of different functional components on the engine universal fuel consumption, which can eliminate the influence of the bench fuel consumption accuracy and improve the engine universal fuel consumption. The fuel consumption is unified into the same influencing factor state, which improves the accuracy of the engine's universal fuel consumption and avoids secondary performance development caused by misjudgment of engine performance caused by fuel consumption deviation.

The present invention also obtains the universal fuel consumption data through this method, which can eliminate the influence of the bench and different functional components on the engine universal fuel consumption, so that the universal data measured in different states can be unified into a designated state, providing a basis for subsequent simulations and tests. The analysis provides accurate and reliable universal fuel consumption data.

Description of the drawings

In order to explain the technical solution of the present invention more clearly, the drawings required for the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, As far as workers are concerned, other drawings can also be obtained based on these drawings without exerting creative work.

Figure 1 is a flow chart of the engine universal fuel consumption correction method under multi-factor coupling;

Figure 2 shows the original universal fuel consumption data of the engine measured on the A bench;

Figure 3 is the Wanyou fuel consumption data chart after interpolation and sorting of the Wanyou fuel consumption data chart in Figure 2;

Figure 4 shows the difference data of universal fuel consumption between platform A and platform C;

Figure 5 shows the universal fuel consumption difference data measured on the B bench with or without the functional component exhaust treatment system;

Figure 6 shows the corrected engine universal data diagram for the designated platform C carrying the exhaust gas treatment system;

Figure 7 is a schematic diagram of the engine's universal fuel consumption correction system under multi-factor coupling.

Detailed ways

The method for correcting the global engine fuel consumption under multi-factor coupling provided by the present invention is to solve the problem of excessive deviation in the global engine fuel consumption caused by the coupling of current bench factors and functional component factors. The universal engine fuel consumption correction method provided by the present invention under multi-factor coupling includes both hardware-level technology and software-level technology. The hardware level used in the engine's universal fuel consumption correction method includes multiple benches, sensors, smart chips, cloud computing, distributed storage, big data processing technology, operation/interaction systems, mechatronics and other technologies. The software technology used in the universal engine fuel consumption correction method mainly includes but is not limited to object-oriented programming languages - such as Java, Smalltalk, C++, and also includes conventional procedural programming languages - such as "C" language or similar programming language.

The engine's universal fuel consumption correction method uses linear interpolation or nonlinear interpolation and other technologies, establishes a calculation model of universal fuel consumption data, and uses sensor monitoring, data transmission and other technologies to achieve universal engine fuel consumption detection and correction, thereby avoiding errors caused by fuel consumption deviations. Secondary performance development caused by misjudgment of engine performance.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1 to 6, which are flow charts and engine universal data diagrams of a method for correcting engine universal fuel consumption under multi-factor coupling in a specific embodiment. The method includes:

S1: Obtain the universal fuel consumption data of the engine on different benches and without or with different functional components.

In this embodiment, Figure 2 illustrates step S1 of obtaining universal fuel consumption data of an engine on different benches. The benches of the present invention involve bench A, bench B, and bench C. The same engine is placed on bench A. , the original data of universal fuel consumption measured by bench B and bench C is A0 (x _i , y _i , z _i ). Among them, x _i represents the engine speed (rpm), _yi represents the engine torque (Nm), and z _i represents the engine specific fuel consumption g/kWh at the engine speed x _i and torque _yi . B0 (x _i , y _i , z _i ) and C0 (x _i , y _i , z _i ) are data in the same format, but have different data values.

Similarly, Wanyou’s fuel consumption data with different functional components is the Wanwan fuel consumption data of the same engine on the same platform with or without different functional components e.

For example, the universal fuel consumption data measured on the B bench with or without the engine exhaust treatment system are Be1 ( _xi , y _i , z _i ) and Be0 (x _i , yi _, z _i ). The format of the data universal graph is the same as Figure 2, but the data values are different.

It should be noted that the functional component in step S1 can 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, and an air conditioning compressor control strategy. Control strategy, combustion control control strategy, exhaust gas control strategy, etc.

The universal specific fuel consumption data points shown in Figure 2 are in a non-regular state, and the torque value of the universal data point of the engine can be measured based on bench A in a non-integer state.

S2: Perform target speed and torque interpolation processing on the universal fuel consumption data.

In this embodiment, as shown in Figure 3, in order to facilitate the calculation of the universal difference in the next step, step S2 performs target speed and torque interpolation on the universal fuel consumption data, divides the engine speed and engine torque into equal parts, and performs engine Specific fuel consumption is interpolated, for example, the engine speed is divided into 100 rpm and the engine torque is divided into 50 Nm. The interpolation method is not limited to linear interpolation or nonlinear interpolation.

It should be noted that there is no limit to the equal intervals of speed and torque in step S2. The rotation speed can also be divided into equal parts at 50 rpm and the torque can also be divided into equal parts at 100 Nm. The interpolation method is not limited and is not limited to linear interpolation or nonlinear interpolation.

S3: Perform difference calculation on the processed data to obtain the universal fuel consumption difference of different benches and the universal fuel consumption difference of not carrying or carrying different functional components.

Specifically, Figure 4 shows the universal fuel consumption A0 (x _i , y _i , z _i ) and C0 (x _i , y _i ) measured on bench A and bench C respectively for the same engine. , z _i ), the calculation method for the difference in fuel consumption of the engine on platform A and platform C is:

A0-C0(x _i , y _i , z _i ) = A0(x _i , y _i , z _i ) - C0(x _i , y _i , z _i ).

Similarly, if the difference in fuel consumption between platform A and platform B or between platform B and platform C is required, the same calculation method is used, and the specific calculation method will not be described again.

Figure 5 shows the universal fuel consumption difference Be1-Be0 (x _i , y _i , z _i ) of the same engine on bench B whether it carries the functional component exhaust gas treatment system. Here it is considered that the functional component exhaust gas treatment system affects the engine's universal fuel consumption. The impact is calculated as:

Be1-Be0 (x _i , y _i , z _i ) = Be1 (x _i , y _i , z _i ) - Be0 (x _i , y _i , z _i )

It can be understood that the embodiment of the present invention only uses the exhaust gas treatment system as an example of a functional component. There can be multiple functional components, including any functional components or electronic control strategies that affect engine fuel consumption, such as fans, air conditioners, etc. Compressor, air conditioning compressor, combustion control strategy, emission control strategy, etc.

S4: The universal fuel consumption of the engine measured on the bench is superimposed with the universal fuel consumption difference of different engine benches or the universal fuel consumption difference of different functional components to obtain the universal fuel consumption data of the engine with specified functional components on the designated bench. .

In step S4, the universal fuel consumption of the engine measured on a certain bench is superimposed with the difference in universal fuel consumption of different engine benches or the difference in universal fuel consumption of different functional components to obtain the fuel consumption of the engine with specified functional components on the specified bench. All fuel consumption data.

Specifically, as shown in Figure 6, the original universal fuel consumption data A0 (x _i , y _i , z _i ) of the engine measured on bench A is different from the universal fuel consumption data of the engine benches A and C. The values A0-C0 (x _i , y _i , z _i ), or the universal fuel consumption difference values Be1-Be0 (x _i , y _i , z _i ) of different functional components are accumulated to obtain the engine with the specified speed on the specified platform C. The universal fuel consumption data Ce1 ^' (xi _, y _i , z _i ) of the functional component e.

The calculation method is: 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 present invention uses the difference in fuel consumption between the platform A and the fuel consumption difference between the platform C and the fuel consumption difference obtained on the platform B with or without exhaust gas after-treatment to correct the engine on the specified platform C. Carry all fuel consumption data of exhaust gas treatment system.

The same method can be used to obtain the universal fuel consumption data of platform D and platform F carrying different functional components. In this way, the universal fuel consumption correction method invented in this invention can be applied to universal Nox, exhaust temperature and other indicators that can be counted in universal form.

It should be understood that the sequence number of each step in the above embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

The following is an example of a universal engine fuel consumption correction system under multi-factor coupling provided by an embodiment of the present disclosure. This system and the multi-factor coupling multi-factor coupling method for engine universal fuel consumption correction in the above-mentioned embodiments belong to the same inventive concept. For details that are not described in detail in the embodiment of the engine's universal fuel consumption correction system under factor coupling, please refer to the above embodiment of the engine's universal fuel consumption correction method under multi-factor coupling.

As shown in Figure 7, the system includes: Wanyou fuel consumption data acquisition module, data processing module, data calculation module and data output module;

Wanyou fuel consumption data acquisition module is used to obtain Wanyou fuel consumption data of engines on different benches and without or with different functional components;

A data processing module used to perform target speed and torque interpolation processing on the universal fuel consumption data;

The data calculation module is used to perform difference calculation on the processed data to obtain the universal fuel consumption difference of different benches and the universal fuel consumption difference of not carrying or carrying different functional components;

The data output module is used to superimpose the universal fuel consumption of the engine measured on the bench with the difference in universal fuel consumption of different engine benches or the difference in universal fuel consumption of different functional components to obtain the fuel consumption of the engine with specified functional components on the specified bench. All fuel consumption data.

The engine universal fuel consumption correction system under multi-factor coupling provided by the embodiment of the present disclosure can eliminate the influence of bench fuel consumption accuracy, unify the engine universal fuel consumption under the same influencing factor state, improve the accuracy of the engine universal fuel consumption, and avoid Secondary performance development caused by misjudgment of engine performance caused by fuel consumption deviation.

The units and algorithm steps of each example described in the disclosed embodiments of the universal engine fuel consumption correction system under multi-factor coupling provided by the embodiments of the present disclosure can be implemented with electronic hardware, computer software, or a combination of both. For clarity To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of the present invention.

The universal engine fuel consumption correction system under multi-factor coupling of the present disclosure is based on the units and algorithm steps of each example described in the embodiments disclosed herein, and can be implemented with electronic hardware, computer software, or a combination of both. For clarity To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of the present invention.

The above description of the disclosed embodiments enables those 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 practiced in 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 (4)

1. The universal oil consumption correction method for the engine under the multi-factor coupling is characterized by comprising the following steps of:

s1: 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 different functional parts on the same rack;

s2: the method comprises the steps of carrying out target rotating speed and torque interpolation processing on universal oil consumption data acquired by non-carrying functional components and universal oil consumption data acquired by carrying different functional components; equally dividing the engine speed and the engine torque, and interpolating the specific oil consumption of the engine;

s3: performing difference calculation on the processed data to obtain universal oil consumption differences of different racks and universal oil consumption differences without carrying or carrying different functional components;

performing difference calculation on the sorted data to respectively obtain universal oil consumption differences of the rack A, the rack B and the rack C and universal oil consumption differences of different functional components on the rack B;

the universal oil consumption difference calculation method among the rack A, the rack B and the rack C comprises the following steps:

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 ）；

the different functional parts on the rack B have fuel consumption difference 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 ）；

Be1（x _i ，y _i ，z _i ) The method comprises the steps of measuring universal oil consumption data carrying an engine tail gas treatment system on a B rack;

Be0（x _i ，y _i ，z _i ) The universal oil consumption data of the tail gas treatment system of the engine is not carried in the B bench.

2. The multi-factor coupled engine universal fuel consumption correction method according to claim 1, wherein the functional components in step S1 include an engine exhaust gas treatment device, or an electronically controlled control strategy.

3. 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.

4. 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 3; 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;

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 method comprises the steps of carrying out a first treatment on the surface of the The universal oil consumption data carrying different functional parts are universal oil consumption data measured by the same engine carrying different functional parts on the same rack;

the data processing module is used for carrying out target rotating speed and torque interpolation processing on the universal oil consumption data acquired by the non-carrying functional components and the universal oil consumption data acquired by the different functional components; equally dividing the engine speed and the engine torque, and interpolating the specific oil consumption of the engine;

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 without carrying or carrying different functional components;

performing difference calculation on the sorted data to respectively obtain universal oil consumption differences of the rack A, the rack B and the rack C and universal oil consumption differences of different functional components on the rack B;

the universal oil consumption difference calculation method among the rack A, the rack B and the rack C comprises the following steps:

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 ）；

the different functional parts on the rack B have fuel consumption difference 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 ）；

B0（x _i ，y _i ，z _i ) The universal oil consumption data of the functional parts are not carried by the rack B;

Be1（x _i ，y _i ，z _i ) The rack B is provided with universal oil consumption data of a tail gas treatment system of the functional component;

and the data output module is used for outputting the universal oil consumption data of the engine with the specified functional parts on the specified rack.