JP2010144655A - Map creation supporting device, method and program for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform testing to be carried out when creating a control map stored and used in an engine control device. <P>SOLUTION: A map creation supporting device 10 includes: a first processing section 23 carrying out an experimental design on a plurality of mode points specified by torque and rotation speeds and selecting a control factor meeting a predetermined engine characteristic demand from among candidates for control factor; a second setting section 24 setting a plurality of second additional testing points; an extraction section 25 extracting at least two control factors estimated to meet the predetermined engine characteristic demand at the second additional testing points; a second processing section 26 selecting the control factor for each of the second additional testing points meeting the predetermined engine characteristic demand from among the control factors extracted by the extraction section 25; and a first response curve creation section 27 using results of the first processing section 23 and the second processing section 26 and creating a first response curve showing relationship among the torque, the rotation speeds and engine characteristic values. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a map creation support apparatus that supports creation of a control map that is stored and used in an engine control apparatus, a method thereof, and a program.

In recent years, diesel engines have become capable of fine control for improving fuel efficiency and exhaust gas by adopting an electronically controlled common rail fuel injection control device. Specifically, multistage fuel injection according to the engine fuel cycle is possible, and in addition to main fuel injection (main injection), two stages of injection are also performed at the timing before and after that, A total of 4 to 5 stages of fuel injection may be performed.
In addition, devices such as exhaust gas recirculation (EGR) and variable structure superchargers (for example, VG (Variable Geometry) turbo, etc.) are attached, and the number of control factors is very large.
As for the control conditions of these control factors, it is common to store appropriate values determined in advance in tests as maps in an engine control unit (ECU: Engine Control Unit).
Therefore, the optimized control conditions optimized are stored in this map. To determine the control conditions (fuel injection pattern, etc.) of a number of control factors in order to satisfy exhaust gas regulations in the engine speed and torque operating range, it is necessary to carry out a point-by-point engine test. Obviously, it takes a lot of time.
For this reason, reduction of test man-hours using the design of experiments, methods of using mathematical approximation models of engine characteristics using response surface methodology, and application of optimization methods have been proposed.
JP 2005-42656 A

However, even if the experimental design method is used, the number of tests in consideration of all the control factors becomes enormous in the rotation speed-torque space. The response surface method also requires a sufficient number of data to accurately identify the relationship between control factors and response characteristics, so the number of tests increases as the control factors increase, making it easy to become difficult in practice. To be expected.
In principle, the optimization method can obtain an optimal solution, but there are many cases where a response surface model is required for high-speed optimization, and there is a drawback that it takes time when the control factor increases. In addition, when considering the smooth controllability of the entire engine, it is necessary to incorporate appropriate control conditions.

  The present invention has been made to solve the above-described problem, and can efficiently perform a test performed when creating a control map stored and used in an engine control device, and can reduce time. An object of the present invention is to provide a map creation support apparatus, method, and program.

In order to solve the above problems, the present invention employs the following means.
The present invention is a map creation support device that supports creation of a control map that is stored and used in an engine control device, and is specified by storage means in which control factor candidates are stored, torque, and rotational speed. A first setting means for setting a plurality of mode points, and an experiment design method for each of the mode points, and a control factor satisfying a predetermined engine characteristic requirement is selected for each mode point from among the control factor candidates. First processing means to select, a second setting means for setting a plurality of second additional test points which are test points other than the mode points, and control factors at each mode point obtained by the first processing means Based on the above, at least two control factors estimated to satisfy a predetermined engine characteristic requirement at the second additional test point are extracted from a plurality of control factor candidates stored in the storage means. And a second processing means for selecting a control factor satisfying a predetermined engine characteristic requirement from among the control factors extracted by the extraction means for each of the second additional test points, and a first process A first response representing the relationship among torque, engine speed and engine characteristic value based on the control factor at each mode point determined by the means and the control factor at each second additional test point determined by the second processing means. Provided is a map creation support device comprising first response curved surface creation means for creating a curved surface.

According to the present invention, a plurality of mode points specified by the torque and the rotational speed are set by the first setting unit, and the first processing unit selects from among a plurality of control factor candidates stored in the storage unit. A control factor that satisfies a predetermined characteristic requirement for each mode point is selected. Subsequently, a plurality of second additional test points other than the mode points are set by the second setting means, and at least two control factor candidates estimated to satisfy a predetermined engine characteristic requirement at the second additional test points are obtained. Extracted by extraction means. In the second processing means, a control factor that satisfies a predetermined characteristic requirement at each second additional test point is selected from at least two control factor candidates extracted by the extraction means. In this way, when the control factors are obtained for the mode point and the second additional test point, the first response curved surface representing the relationship among the torque, the rotational speed, and the engine characteristic value is obtained using these control factors. Created by response surface creation means. In the subsequent processing, the first response curved surface is referred to and a map stored in the engine control device is created.
As described above, in the present invention, the control factor at each mode point is selected by the first processing unit prior to the setting of the second additional test point. Therefore, the second additional test is performed in consideration of the tendency of the control factor. It becomes possible to limit the candidate of the control factor used for the experiment design method in a point. As a result, the processing time can be shortened, and the relationship between the control factor and the characteristic value can be acquired efficiently.

  In the map creation support apparatus, the first response curved surface creation means divides the control factor obtained by the first processing means and the control factor obtained by the second processing means according to the attribute, and the divided control factors. The response curved surface may be created every time.

  In this way, the control factors are classified according to their attributes, and a response surface is created for each of the classified control factors. Therefore, the amount of data used to create one response surface can be reduced. Thereby, the processing load can be reduced and the processing time can be shortened.

  The map creation support apparatus includes an input unit for a user to input information, and the extraction unit is configured to input at least two control factor candidates at each of the second additional test points from the input unit. These input control factor candidates may be extracted from the storage means.

  According to such a configuration, when the control factor at the second additional test point is obtained, the user can select a candidate control factor.

  The map creation support apparatus includes second response curved surface creation means for creating a second response curved surface representing the relationship between torque, rotation speed, and engine characteristic value based on the control factor obtained by the first processing means. Also good.

As a process subsequent to the creation of the first response curved surface, an optimization calculation for calculating a condition of a control factor for obtaining a desired torque is performed when the rotation speed is fixed to a predetermined value. This optimization calculation is performed using the first response surface. Examples of the control factor condition include the number of fuel injection stages, the fuel injection timing, the fuel injection amount, and the rail pressure.
In the above optimization calculation, a solution of a mathematical model is obtained. However, when the solution is obtained, there is a possibility that the solution cannot be obtained if starting from an erroneous initial value. In such a case, as described above, the second response surface is created using the control factor selected at the mode point with a small amount of data, and the solution on the first response surface is roughly obtained using the second response surface. If the prediction is performed, the initial value of the solution search when solving the mathematical model using the first response surface can be set to an appropriate value.
In this way, by assigning a solution eye using the second response surface with a small amount of data, an appropriate initial value can be set in an actual solution search using the first response surface, It is possible to reduce the processing load required to solve the mathematical model and shorten the processing time.

  The map creation support apparatus solves a predetermined mathematical model using the first response curved surface, thereby obtaining a solution of a control factor condition for obtaining a desired torque when the rotation speed is fixed to a predetermined value. An optimization calculation means and an input means for inputting a solution search range may be provided, and the optimization calculation means may solve the mathematical model in the solution search range input from the input means. .

  According to such a configuration, the optimization calculation means only needs to find a solution in the search range of the solution input by the input means. Therefore, in other words, when the rotation speed is fixed to a predetermined value, The condition of the control factor for obtaining the torque can be obtained efficiently.

  In the map creation support apparatus, if the optimization calculation means solves the mathematical model in the search range of the solution input from the input means and finds no solution, the optimization calculation means The search range may be extended.

  In this way, when no solution satisfying the above condition is found in the solution search range input by the input means, the solution search range is automatically expanded, and the solution search is continued. Will be. This makes it possible to find a solution reliably.

  In the map creation support apparatus, the first setting means may set a predetermined operating point on which a characteristic value condition is imposed by a standard such as an international standard as the mode point.

  As described above, the predetermined operating point (point consisting of a combination of the torque and the rotational speed) for which the characteristic value condition is imposed by the standard or the like is predetermined from all the control factors stored in the storage means. Therefore, a control factor that satisfies the characteristic requirements is selected. Thereby, in the selection of the control factor at the mode point, it is possible to ensure high accuracy as compared with the case of the second additional test point.

  In the map creation support apparatus, the first setting means is configured to reduce the torque and the number of rotations in an XY coordinate system in which torque is defined in either the X coordinate or the Y coordinate and the rotation number is defined in the other direction. In nine areas on the XY coordinate system created when each of the three high levels is divided, if at least one mode point is not set for each area, a test point is set for each of the areas. As described above, the first additional test point may be set.

  As described above, by setting the first additional test point, it is possible to vary the test points including the mode points in a balanced manner in the XY coordinate system defined by the torque and the rotational speed. As a result, when a second additional test point that interpolates between each mode point and the first additional test point is set, a control factor that is a candidate for the second additional test point can be estimated easily and accurately. It becomes possible.

In the map creation support apparatus, the control factor is, for example, a fuel injection condition.
More specifically, the control factor includes, for example, at least one of a fuel injection timing, a fuel injection amount, and a fuel injection stage number.
The engine characteristic value is, for example, at least one of an exhaust gas value and a fuel consumption.

  The present invention is a map creation support method for supporting creation of a control map stored and used in an engine control device, wherein a plurality of mode points specified by torque and rotational speed are set, and the mode points The experiment design method is carried out for each, a control factor satisfying a predetermined engine characteristic requirement is selected for each mode point from a plurality of preset control factor candidates, and test points other than the mode point are selected. A plurality of second additional test points are set, and based on the control factor obtained for each mode point, a control factor that can be a solution of the second additional test point is set as a preset control factor. A control factor that satisfies a predetermined engine characteristic requirement is selected for each of the second additional test points from among the extracted control factors, and the mode point and the second additional test point are selected. Based on the control factor obtained, provides a map creation support method for creating a first response surface representing the relationship between the rotational speed and the engine characteristic values and torque.

  The present invention is a map creation support program for supporting the creation of a control map stored and used in an engine control device, the step of setting a plurality of mode points specified by torque and rotation speed, Performing an experimental design for each of the mode points, and selecting a control factor satisfying a predetermined engine characteristic requirement for each mode point from a plurality of preset control factor candidates; A step of setting a plurality of second additional test points which are test points other than the mode point, and a control factor that can be a solution of the second additional test point based on the control factor obtained for each mode point, A step of extracting from preset control factor candidates, and a predetermined engine characteristic requirement is satisfied for each of the second additional test points from the extracted control factors. Selecting a control factor, and creating a first response surface representing a relationship among torque, rotational speed, and engine characteristic value based on the control factor obtained at the mode point and the second additional test point. A map creation support program to be executed by a computer is provided.

  According to the present invention, it is possible to efficiently perform a test performed when creating a control map stored and used in an engine control device, and to shorten the time.

  Hereinafter, an embodiment of a map creation support apparatus, method and program according to the present invention will be described with reference to the drawings.

The map creation support device according to the present embodiment is a device that supports creation of a control map that is stored and used in an engine control device mounted on a vehicle or the like. FIG. 1 is a block diagram showing a schematic configuration of a map creation support apparatus according to the present embodiment.
As shown in FIG. 1, a map creation support apparatus 10 according to the present embodiment is a computer system (computer system), and a main storage device 12 such as a CPU (Central Processing Unit) 11 and a RAM (Random Access Memory). , An auxiliary storage device 13 such as an HDD (Hard Disk Drive), an input device 14 such as a keyboard and a mouse, an output device 15 such as a monitor and a printer, and a communication device 16 that exchanges information by communicating with external devices. Etc.
Various programs (for example, simulation programs) are stored in the auxiliary storage device 13, and the CPU 11 reads out the programs from the auxiliary storage device 13 to the main storage device 12 and executes them to implement various processes.

  FIG. 2 is a functional block diagram showing the functions provided in the map creation support apparatus 10 in an expanded manner. As shown in FIG. 2, the map creation support apparatus 10 includes a storage unit 21, a first setting unit 22, a first processing unit 23, a second setting unit 24, an extraction unit 25, and a second processing unit. 26, a first response curved surface creation unit 27, and a second response curved surface creation unit 28 as main components. The first response curved surface created by the first response curved surface creation unit 27 and the second response curved surface created by the second response curved surface creation unit 27 are given to the optimization calculation unit 30 at the subsequent stage and used for creating the control map. It is done.

  The storage unit 21 stores control factor candidates. The control factor is, for example, a fuel injection condition, and includes at least one of a fuel injection timing, a fuel injection amount, and the number of fuel injection stages. In the present embodiment, the control factor is a combination of the injection timing and the number of injection stages as shown in FIG. As described above, in the present embodiment, eight control factor candidates having different combinations of the injection timing and the number of injection stages are stored in the storage unit 21. In the following, for convenience of explanation, control factor candidates are described as the first shot mode SM1, the second shot mode SM2, and the like. In FIG. 3, the horizontal axis indicates the engine rotation angle, the vertical axis indicates the fuel injection amount, and the trapezoid indicates the main injection.

  The first setting unit 22 first sets a plurality of mode points specified by torque and rotation speed. In setting the mode point, for example, a mode point of torque-rotation speed determined by the standard such as TIER in the United States is set. In the present embodiment, as shown in FIG. 4, A to H, which are operating points where exhaust gas is regulated, are set as mode points. In FIG. 4, the horizontal axis represents the engine speed and the vertical axis represents the torque.

Further, the first setting unit 23 adds a first additional test point in the rotational speed-torque coordinate system shown in FIG. 4 so as to interpolate the mode point. For example, in the mode point shown in FIG. 4, it can be seen that no mode point is set in the region of low rotation speed and high torque and in the region of medium rotation speed and low torque. Therefore, as shown in FIG. 5, by additionally setting the first additional test point in the region where the mode points are insufficient, in the entire region from the low rotation speed to the high rotation speed, or from the low torque to the high torque, Test points including the mode point and the first additional test point are arranged in a balanced manner.
Thereby, for example, the first additional test point can be set for each of the nine regions in each combination when the rotation speed and torque are divided into three stages of low, medium, and high, respectively.

The first processing unit 23 stores a storage unit for each of a total of 11 test points A to K including eight mode points A to H and three first additional test points I to K set by the first setting unit 22. A control factor that satisfies a predetermined engine characteristic requirement is obtained from among a plurality of control factor candidates stored in 21. At this time, the first processing unit 23 specifies a control factor that satisfies a predetermined engine characteristic requirement by using an experimental design method.
Specifically, the engine test is performed for each of the first shot mode SM1 to the eighth shot mode SM8 that are eight control factors stored in the storage unit 21, and the torque-rotation number specified at each test point. In this case, what kind of engine characteristics can be obtained is tested. The engine characteristics are, for example, exhaust gas amount, fuel consumption, and the like, and control factors are specified such that these engine characteristic values satisfy a predetermined required value. At this time, by using the orthogonal table, it is possible to perform an efficient simulation.
The experiment design method is a known technique as disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-322938, and detailed description thereof is omitted.

  In this way, a control factor that satisfies a predetermined engine characteristic requirement is selected by the first processing unit 23 for each of the test points A to K. FIG. 6 shows an example of the processing result of the first processing unit 23. In the present embodiment, as shown in FIG. 6, the control factor SSM1 for the test points A, E, and I to K, the control factor SSM8 for the test points B and C, and the test points D and F to H, respectively. The control factor SSM6 has been selected.

  The second setting unit 24 sets second additional test points that are test points other than the eleven test points A to K set by the first setting unit 22. For example, since the first setting unit 22 sets only 11 test points, this data amount is insufficient for evaluating the engine characteristic value and creating the control map. For this reason, the second setting unit 24 sets a number of second additional test points so as to interpolate the test points set by the first setting unit 22, and performs a test in a well-balanced manner in the rotational speed-torque coordinate space. Make sure the points are placed.

The extraction unit 25 is a control factor candidate based on the first shot mode SM1, the sixth shot mode SM6, and the eighth shot mode SM8 that are control factors at the test points A to K obtained by the first processing unit 23. That is, at least two control factors are extracted from the control factors shown in FIG. 3 and the first shot mode SM1 to the eighth shot mode SM8.
For example, in the present embodiment, since the first shot mode SM1, the sixth shot mode SM6, and the eighth shot mode SM8 are selected as a result of the first processing unit 23, the extraction unit 25 selects these three. It is good also as extracting. Further, in this case, if any condition is registered in advance, for example, “if the first shot mode SM1 and the eighth shot mode SM8 are selected, also extract the second shot mode SM2.” When the conditions such as are registered, the extraction unit 25 may extract the second shot mode SM2 in accordance with the conditions.

  In addition, the extraction unit 25 may extract the control factors for all the second additional test points at once, or may extract the control factors for each second additional test point.

The extraction unit 25 may extract a control factor that satisfies a condition according to a registered program from the storage unit 21, for example, extracting a control factor based on input information from the input device 14. Also good.
In the latter case, for example, by referring to the result of FIG. 6 displayed on the display screen, the user may extract control factor candidates for each operation region defined by the torque and the rotational speed. Good.

  For example, in the test results shown in FIG. 6, when the first shot mode SM1 is selected as the control factor in the low rotation speed region and the low torque region, and both the rotation speed and the torque are in the intermediate region, The eighth shot mode SM8 is selected as the control factor, and the sixth shot mode SM6 is selected as the control factor when both the rotational speed and the torque are in the middle-high range. From such a result, for example, as shown in FIG. 7, the eighth shot mode SM8 is preferable as the control factor in the vicinity of the intermediate region Q2, and the sixth shot mode is used as the control factor for the medium and high rotation speeds and torques. It can be estimated that SM6 is preferable. From this, the user gives an instruction from the input device 14 to extract the eighth shot mode SM8 as the control factor for the region Q1 and the sixth shot mode SM6 as the control factor for the region Q2.

Subsequently, it can be seen that the first shot mode SM1 is preferable as a control factor in the low torque region and the low rotation speed region. However, when an orthogonal table is used in the second processing unit 26 described later, the region Q is required to be a quadrangle. Accordingly, the user gives an instruction from the input device 14 to select the first shot mode SM1 as a control factor throughout.
In addition, for example, in the region where the control factor transitions from the first shot mode SM1 to the sixth shot mode SM6, the use of the second shot mode SM2 may be determined by operation or the like. In this case, the user gives an instruction from the input device 14 to select the second shot mode SM2 in accordance with the operation.
Thus, the extraction unit 25 extracts each control factor from the storage unit 21 in accordance with these instructions input from the input device 14. At this time, for locations where the regions overlap, for example, the overlapping regions of the region Q1, the region Q2, and the region Q3, the first shot mode SM1, the second shot mode SM2, the sixth shot mode SM6, the eighth The shot mode SM8 is extracted.

The second processing unit 26 performs an experimental design for the first shot mode SM1, the second shot mode SM2, the sixth shot mode SM6, and the eighth shot mode SM8 that are control factors extracted by the extraction unit 25, At each of the second additional test points, a control factor that satisfies a predetermined engine characteristic requirement is selected.
In this way, since the control factors used in the experimental design method are limited in the second processing unit 26, all the control factors stored in the storage unit 21 are the first shot mode SM1 to the eighth shot mode SM8. The processing load can be reduced and the processing time can be shortened as compared with the first processing unit 23 that implements the experimental design method using.

The first response curved surface creating unit 27 is based on the control factors at the 11 test points A to K obtained by the first processing unit 23 and the control factors at the respective second additional test points obtained by the second processing unit 26. Thus, a first response curved surface representing the relationship among the torque, the rotational speed, and the engine characteristic value is created.
An example of the first response curved surface is shown in FIG. In FIG. 8, the horizontal axis represents the engine speed and the vertical axis represents the torque, and each characteristic represents a different level of exhaust gas. The characteristics shown below have less exhaust gas.

  At this time, the first response surface creation unit 27 may create a first response surface for each control factor. For example, in the present embodiment, the first shot mode SM1, the second shot mode SM2, the sixth shot mode SM6, and the eighth shot mode are used as control factors at the mode point, the first additional test point, and the second additional test point. Since any of SM8 is selected, for each control factor, that is, for each of the first shot mode SM1, the second shot mode SM2, the sixth shot mode SM6, and the eighth shot mode SM8, the rotational speed, torque, exhaust gas, The fuel consumption data is divided, and a first response surface representing the relationship between the torque, the rotational speed, and the engine characteristic values (exhaust gas, fuel consumption) is created for each of the divided control factors.

  The second response curved surface creation unit 28 represents the relationship between the torque, the rotational speed, and the engine characteristic values (exhaust gas, fuel consumption) based on the control factors at the mode point and the first additional test point obtained by the first processing unit 23. A second response surface is created. The second response surface is different from the first response surface in the relationship between input and output. That is, as will be described later, the first response curved surface is for solving the control factor condition when the torque is closest to the target torque when the rotational speed is fixed. On the other hand, the second response curved surface uniquely outputs the control factor conditions such as the fuel injection amount, the fuel injection timing, the fuel injection stage number, the rail pressure, etc. when the torque and the rotational speed are designated as the input information. It is supposed to be done.

  Next, the optimization calculation unit 30 solves a predetermined mathematical model using the first response curved surface created by the first response curved surface creation unit 27 to fix the rotation number to a predetermined value. The condition of the control factor for obtaining the torque is obtained as a solution. For example, the optimization planning unit 30 solves the condition of the control factor when the torque is closest to the target torque when the rotation speed is fixed. Examples of the control factor condition include the number of fuel injection stages, fuel injection timing, fuel injection amount, rail pressure, and the like.

Here, when performing a solution search using the first response curve, if a solution search is started from an incorrect initial value, a solution may not be obtained. In order to avoid such a case, in this embodiment, the solution on the first response surface is predicted using the second response surface with a small number of data. Specifically, the optimization calculation unit 30 first obtains the condition of the control factor when the torque and the rotation speed are given as input information at each test point of the second response surface with a small amount of data. As described above, when the second response curved surface itself specifies the torque and the rotation speed as the input information, the control factor conditions such as the fuel injection amount, the fuel injection timing, the fuel injection stage number, the rail pressure, etc. Is uniquely output, and can be easily realized.
Subsequently, the optimization calculation unit 30 sets the solution obtained using the second response curved surface as an initial value of the solution search on the first response curved surface, and when the rotation speed is fixed, the torque becomes the target torque. Solve the conditions of the control factor when approaching closest. As described above, by setting the solution of the second response surface created based on a small amount of data as the initial value of the solution search of the first response surface, the solution search can be started from the optimal initial value, and the efficiency In addition, it is possible to search for a solution and solve various problems such as a solution not being obtained.

The optimization calculation unit 30 repeatedly obtains a control factor condition for obtaining a desired torque at each rotational speed by sequentially updating the rotational speed as a fixed value on the first response surface. Thereby, the conditions of the control factor under various operating conditions defined by the torque and the rotational speed, and the fuel consumption and exhaust gas amount when using this control factor can be acquired.
In addition, since the solution search is performed using the second response surface created for each shot mode, the solution search can be performed more efficiently.

  In this way, a solution search using the first response curved surface is performed, and the conditions of the control factors that satisfy the engine characteristic requirements under each operation condition defined by the torque and the rotational speed, for example, the fuel injection amount, the fuel When the injection timing, the number of fuel injection stages, the rail pressure, and the like are obtained, an engine control map is created so that the torque gradually changes based on these results.

  As described above, according to the map creation support apparatus, method, and program according to the present embodiment, each mode point and each of the mode points are selected by the first processing unit prior to selection of the control factor at each second additional test point. Since the control factor at the first additional test point is selected, the control factor candidates used for the experimental design at the second additional test point can be limited in consideration of the tendency of the control factor. As a result, the processing time can be shortened, and the relationship between the control factor and the characteristic value can be acquired efficiently.

  Also, the control factors are classified according to their attributes, and the first response surface and the second response surface are created for each of the divided control factors, so the amount of data used to create one response surface is reduced. Can do. Thereby, the processing load can be reduced and the processing time can be shortened.

  Furthermore, before performing solution search using the first response surface, a solution on the first response surface is predicted using the second response surface created based on a small amount of data. An appropriate value can be set. Thereby, the solution search using the first response curved surface can be performed efficiently.

[Modification 1]
In the above-described embodiment, the test point setting is divided into two stages including a mode point and a first additional test point setting stage, and a second additional test point setting stage. Without dividing, all test points (mode point + first additional test point + second additional test point) are set at once, and control factors that satisfy the predetermined engine characteristic requirements for each of these test points are set. It may be asking. In other words, in the above-described embodiment, the experiment design method is implemented by using the first shot mode SM1 to the eighth shot mode SM8 that are control factors as candidates for each test point, and the engine characteristic requirement is satisfied for each test point. It is good also as calculating | requiring a control factor, respectively.
As described above, by executing the design of the experiment at each test point, the processing time becomes longer than in the case of the above-described embodiment, but even in this case, the response surface is obtained for each obtained control factor. By creating a solution and performing a solution search, the overall processing time can be shortened compared to the conventional method.

[Modification 2]
In the above embodiment, the first response surface and the second response surface are created for each control factor. However, the present invention is not limited to this example. For example, one first response surface as a whole is not divided into each control factor. Each of the second response curved surfaces may be created.

[Modification 3]
In the above embodiment, when the optimization calculation unit 30 performs a solution search, a user may be able to set a range for performing a solution search (solution search range) from the input device 14. In this case, the solution search is performed in the solution search range set by the user.
As described above, since the solution search range is set, the solution search may be performed within this solution search range, so that the solution can be efficiently obtained.

Furthermore, as a result of performing the solution search in the solution search range set by the user, if no solution is found, the solution search range is automatically expanded and the solution search is continuously performed until a solution is found. Also good.
As described above, when no solution is found as a result of the solution search in the solution search range, the solution search range is automatically expanded, so that the solution can be found reliably.

It is the block diagram which showed schematic structure of the map creation assistance apparatus which concerns on one Embodiment of this invention. It is the functional block diagram which expanded and showed the function with which the map creation assistance apparatus which concerns on one Embodiment of this invention is provided. It is the figure which showed an example of the control factor. It is a figure for demonstrating the setting of a mode point. It is a figure for demonstrating the setting of a 1st additional test point. It is the figure which showed an example of the process result of a 1st process part. It is a figure for demonstrating the function of an extraction part. It is the figure showing an example of the 1st response curved surface as a contour figure.

Explanation of symbols

10 Map creation support device 11 CPU
12 main storage device 13 auxiliary storage device 14 input device 15 output device 16 communication device 21 storage unit 22 first setting unit 23 first processing unit 24 second setting unit 25 extraction unit 26 second processing unit 27 first response curved surface creation unit 28 Second response surface creation unit 30 Optimization calculation unit

Claims (13)

A map creation support device that supports creation of a control map stored and used in an engine control device,
Storage means in which candidate control factors are stored;
First setting means for setting a plurality of mode points specified by torque and rotational speed;
First processing means for performing an experimental design for each of the mode points, and selecting a control factor satisfying a predetermined engine characteristic requirement among the control factor candidates for each mode point;
Second setting means for setting a plurality of second additional test points which are test points other than the mode points;
Based on the control factor at each mode point determined by the first processing means, at least two control factors estimated to satisfy a predetermined engine characteristic requirement at the second additional test point are stored in the storage means. Extracting means for extracting from a plurality of control factor candidates,
Second processing means for selecting a control factor satisfying a predetermined engine characteristic requirement from among the control factors extracted by the extraction means for each of the second additional test points;
Based on the control factor at each of the mode points determined by the first processing means and the control factor at each of the second additional test points determined by the second processing means, the relationship between the torque, the rotational speed, and the engine characteristic value is represented. A map creation support device comprising first response curved surface creation means for creating a first response curved surface.   The first response curved surface creating means classifies the control factor obtained by the first processing means and the control factor obtained by the second processing means according to the attribute, and the response curved surface is classified for each divided control factor. The map creation support device according to claim 1 to create. An input means for a user to input information;
2. The extraction means extracts the control factor candidates from the storage means when at least two control factor candidates at each of the second additional test points are input from the input means. Or the map creation assistance apparatus of Claim 2.   4. The method according to claim 1, further comprising second response curved surface creating means for creating a second response curved surface representing a relationship among torque, rotation speed and engine characteristic value based on the control factor obtained by the first processing means. The map creation support device described in Crab. An optimization calculation means for solving a condition of a control factor for obtaining a desired torque when a rotational speed is fixed at a predetermined value by solving a predetermined mathematical model using the first response curved surface;
Input means for inputting a search range of solutions,
5. The map creation support apparatus according to claim 1, wherein the optimization calculation unit solves the mathematical model in a search range of a solution input from the input unit.   The optimization calculation means extends the search range of the solution until a solution is found when the mathematical model is solved in the search range of the solution input from the input means and no solution is found as a result. 5. The map creation support apparatus according to 5.   The map creation support apparatus according to any one of claims 1 to 6, wherein the first setting means sets a predetermined operation point on which a characteristic value condition is imposed by a standard such as an international standard as the mode point. .   In the XY coordinate system in which torque is defined in either the X coordinate or the Y coordinate and the rotational speed is defined in the other direction, the first setting means classifies the torque and rotational speed into three stages of low, medium, and high. In the nine regions on the XY coordinate system created at the time, when at least one mode point is not set in each region, a first addition is made so that a test point is set in each region. The map creation support apparatus according to claim 1, wherein a test point is set.   The map creation support apparatus according to claim 1, wherein the control factor is a fuel injection condition.   The map creation support apparatus according to claim 9, wherein the control factor includes at least one of a fuel injection timing, a fuel injection amount, and a fuel injection stage number.   The map creation support apparatus according to any one of claims 1 to 10, wherein the engine characteristic value is at least one of an exhaust gas value and a fuel consumption. A map creation support method for supporting creation of a control map stored and used in an engine control device,
Set multiple mode points identified by torque and speed,
The design of the experiment is performed for each of the mode points, and a control factor that satisfies a predetermined engine characteristic requirement is selected for each mode point from among a plurality of preset control factor candidates,
Setting a plurality of second additional test points which are test points other than the mode points;
Based on the control factor obtained for each mode point, a control factor that can be a solution of the second additional test point is extracted from preset control factor candidates,
From among the extracted control factors, a control factor that satisfies a predetermined engine characteristic requirement is selected for each of the second additional test points,
A map creation support method for creating a first response curved surface representing a relationship among torque, rotation speed, and engine characteristic value based on control factors obtained at the mode point and the second additional test point. A map creation support program for supporting creation of a control map stored and used in an engine control device,
Setting a plurality of mode points specified by torque and rotation speed;
Performing an experimental design for each of the mode points, and selecting, for each mode point, a control factor that satisfies a predetermined engine characteristic requirement from among a plurality of preset control factor candidates;
Setting a plurality of second additional test points that are test points other than the mode points;
Extracting a control factor that can be a solution of the second additional test point based on the control factor obtained for each mode point from preset control factor candidates;
Selecting a control factor satisfying a predetermined engine characteristic requirement for each of the second additional test points from among the extracted control factors;
Creation of a map for causing a computer to execute a step of creating a first response surface representing a relationship among torque, rotation speed, and engine characteristic value based on control factors obtained at the mode point and the second additional test point Support program.

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