JP4821341B2 - Design support method, design support program, and design support apparatus. - Google Patents

Description

  The present invention relates to an engine design support technology, and more particularly to a water jacket design support technology formed on a cylinder head.

In designing a water-cooled cylinder head, it is important to design a water jacket that forms a passage of cooling water for cooling the cylinder head, and various attempts have been made (Patent Documents 1 and 2, etc.). The water jacket is one of the structures that require strict design requirements and manufacturing requirements in order to perform important functions such as cooling the combustion chamber or suppressing the temperature rise of the intake air. For this reason, several designers work together to meet various standards such as water passage area standards and wall thickness standards while considering the relationship with the components of the cylinder head such as the combustion chamber and intake / exhaust elements. The actual situation is that we are working on modeling the jacket.
JP 2003-138937 A JP 2004-162563 A

  Here, in the engine design process, design changes are frequently made based on simulation results and prototype test results in order to satisfy engine performance requirements and productivity requirements. In particular, in the cylinder head, the shape of the intake / exhaust port and the combustion chamber is usually changed frequently. When such a design change of the component of the cylinder head is performed, the shape of the hollow portion formed in the cylinder head in order to configure the component changes, so the water jacket model is also changed to improve the cooling performance and the like. You must evaluate each time. Changing the water jacket model may require re-creating the model from the beginning, which is a factor in reducing design efficiency.

  Accordingly, an object of the present invention is to improve the design efficiency of the water jacket.

According to the present invention, there is provided a design support method for supporting the design of a water jacket formed on a cylinder head using a computer including at least a database , wherein the database shows a three-dimensional shape of a draft water jacket. A W / J model and a cavity defining model showing a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the hollow portion to the three-dimensional shape of the hollow portion formed in the cylinder head are stored in advance. wherein said computer includes a first reading step of reading the W / J model from the database, the computer, and a second reading step of reading said cavity defining model from the database, the computer, and the W / J model Based on the relative positional relationship in the cylinder head with the cavity definition model, / And W / J model generating step of the J model and the cavity defining model and overlap overlapped portions to generate a new said W / J model removed from the W / J model, the computer, the W / J model generation design support method the W / J model generated in step that having a, and W / J model storage step of storing in the database is provided.

  According to the present invention, the new W / J model is generated by deleting the cavity defining model from the W / J model. When the design of the component of the cylinder head is changed and the shape of the cavity portion is changed, the cavity defining model is corrected and a new W / J model is generated again from the original W / J model. Well, it is easy to modify the water jacket model that accompanies the design change. Therefore, the design efficiency of the water jacket can be improved.

  Hereinafter, preferable configurations of the present invention will be listed.

  In the present invention, the hollow portion may include a hollow portion for constituting at least one of an intake element, an exhaust element, a combustion chamber, and a fuel injection element of the cylinder head. According to this configuration, it is possible to easily modify the model of the water jacket accompanying the design change of the intake element, the exhaust element, the combustion chamber, and the fuel injection element of the cylinder head.

Further, in the present invention, the cylinder head is a cylinder head of a multi-cylinder engine, the W / J model and the cavity defining model are models for one cylinder, and the computer performs the W / J model generation step. based on the generated the W / J model, it can be adopted further configuration that having a step of generating a 3-dimensional shape model of the water jacket of all cylinders. According to this configuration, it is possible to perform performance evaluation, productivity evaluation, etc. with a model for one cylinder of the water jacket, and when a satisfactory result is obtained, the entire model can be generated. In the present invention, the computer further includes an operation unit, and the computer defines the hollow portion and the wall unit according to the operation of the operation unit. an input step of accepting input of design information, the computer includes a cavity defined model generating process of generating the cavity defined model based on the design information input in the input step, the computer is, the cavity defined model generation step in can be adopted and storing the generated the cavity defined model in the database, the further configuration that have a. According to this configuration, it is possible to generate the cavity defining model according to the user's request.

  Further, in the present invention, there can be employed a configuration in which there are a plurality of types of the cavity portions, and the cavity definition model is stored in the database for each of the cavity portions. According to this configuration, it is possible to more easily cope with a design change for each component of the cylinder head.

  In this case, in the W / J model generation step, a new W / J model is generated by the W / J model and any one of the cavity defining models, and in the W / J model storage step, The W / J model generated in the W / J model generation step is stored in the database in association with the cavity defining model used to generate the W / J model, and the first reading step and the In the second reading step, it is possible to adopt a configuration in which the W / J model and the cavity defining model are read from the database according to a user's selection. According to this configuration, a plurality of types of the W / J models in which the cavity defining models are deleted in stages are generated and stored, and the W / J models at each stage are used for subsequent modeling work. Therefore, when a design change occurs in some of the components of the cylinder head, the water jacket model can be easily modified.

Further, the computer further comprises a display, the computer can be employed further configuration that having a step for displaying the W / J model and the cavity defined model on the display. According to this configuration, each model can be visually verified.

  According to the present invention, there is provided a design support program for supporting the design of a water jacket formed on a cylinder head, wherein a W / J model indicating a three-dimensional shape of a draft water jacket is read from a database. 1 reading step, and a second reading step of reading from the database a cavity defining model indicating a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the hollow portion to a three-dimensional shape of the hollow portion formed in the cylinder head And the overlapping portion where the W / J model and the cavity defining model overlap is deleted from the W / J model based on the relative positional relationship between the W / J model and the cavity defining model in the cylinder head. W / J model generation process for generating the new W / J model, and before the W / J model generation process Design support program that the W / J model to execute, and W / J model storage step of storing in the database is provided.

  According to the present invention, there is provided a design support apparatus for supporting the design of a water jacket formed on a cylinder head, wherein the first reading means reads a W / J model indicating a three-dimensional shape of a draft water jacket from a database. A second reading means for reading a cavity defining model indicating a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the hollow portion to a three-dimensional shape of the hollow portion formed in the cylinder head from the database; Based on the relative positional relationship between the W / J model and the cavity defining model in the cylinder head, a new overlapping part where the W / J model and the cavity defining model overlap is deleted from the W / J model. W / J model generation means for generating the W / J model; and the W / J model generated in the W / J model generation step Design support apparatus for a W / J model storage means for storing a database, comprising the is provided.

  In the design support program and the design support apparatus of the present invention, the same effect as the design support method can be obtained. Further, a configuration similar to the preferable configuration described for the design support method can be adopted.

  As described above, according to the present invention, the design efficiency of the water jacket can be improved.

<System configuration>
FIG. 1 is a block diagram of a design support system A capable of implementing the design support method of the present invention. The design support system A includes a design support apparatus 100 and a database (hereinafter referred to as DB) server 200, both of which are communicably connected via a communication line (LAN in this case).

  The design support apparatus 100 includes a CPU 101 that executes a design support program described later, a RAM 102 that temporarily stores data and programs processed by the CPU 101, a ROM 103 that stores data and programs executed by the CPU 101, and an OS (operation system). ) And a design support program, which will be described later, and a hard disk (HD) 104 that temporarily stores three-dimensional model data and the like. It goes without saying that other types of storage means can be adopted as these storage means.

An input interface (hereinafter referred to as I / F) (operation unit) 105 is an interface to which an input device (operation unit) such as a mouse or a keyboard for accepting user data input to the design support apparatus 100, processing instructions, and the like is connected. It is. A communication interface (hereinafter referred to as I / F) 106 is an interface for the design support apparatus 100 to transmit / receive data to / from the DB server 200 via the LAN. A display I / F 107 is an interface for the design support apparatus 100 to display a three-dimensional model or the like on the display 110. An example of the design support apparatus 100 having such a configuration is a general-purpose personal computer.

  The DB server 200 is a server that manages data stored in the model DB 210. The DB server 200 transmits the data stored in the model DB 210 to the design support apparatus 100 in response to a request from the design support apparatus 100, and stores the data transmitted from the design support apparatus 100 in the model DB 210. The model DB 210 can be managed by the design support apparatus 100. However, by managing with the DB server 200, a plurality of design support apparatuses 100 can use the model DB 210. This is suitable for assigning the design support apparatus 100 to a plurality of users and performing the design work in collaboration with each user.

<Example of cylinder head>
An example of a cylinder head having a water jacket designed by the design support apparatus 100 will be described. FIG. 6 is a cross-sectional view of the cylinder head 10. The water jacket 11 is a cavity formed in the material of the cylinder head 10. The water jacket 11 is formed so as to avoid a hollow portion formed for other components of the cylinder head 10. FIG. 6 shows a combustion chamber 12, an intake port 13 that is an intake element, an exhaust port 14 that is an exhaust element, and a storage space 15 for a spark plug as the cavity for the other components. The water jacket 11 is not only formed so as to avoid the hollow portions 12 to 15, but walls 10 a to 10 d having a predetermined thickness are formed between the hollow portions 12 to 15 and the water jacket 11. Need to be formed. The wall portions 10a to 10d are wall portions that define the cavity portions 12 to 15, and are at least interposed between the water jacket 11 and the cavity portions 12 to 15.

  In the engine design process, design changes are frequently made based on simulation results and prototype test results in order to satisfy engine performance requirements and productivity requirements. The intake and exhaust ports and the combustion chamber are frequently changed in shape, and the shape of the water jacket must be changed accordingly. As will be described later, this embodiment facilitates changing the shape of the water jacket.

<Model DB>
FIG. 2 is a diagram illustrating an example of a DB included in the model DB 210. The model DB 210 includes a W / J model DB 211, a cavity defining model DB 212, a W / J model DB 213 for all cylinders, an attached model DB 214, and a history information DB 215. In the present embodiment, each model is a three-dimensional solid model and is generated by using a known CAD technique.

  The W / J model DB 211 stores a W / J model indicating the three-dimensional shape of the draft water jacket. In this embodiment, the W / J model is a model for one cylinder. In a cylinder head of a multi-cylinder engine, the configuration of each cylinder is usually the same or the configuration is reversed (mirrored). Therefore, in this embodiment, a model is generated for each cylinder and all cylinders are generated. Generate a minute model.

  The W / J model of the draft water jacket includes an original model and an intermediate model. The original model is a W / J model before an overlapping part with a cavity defining model described later is deleted, and the intermediate model is a W / J model after an overlapping part with at least one cavity defining model is deleted. .

  The original model W / J model is created based on the already determined specifications of the cylinder head specifications. In FIG. 2, a W / J model 211a is an example of a prototype model. In the present embodiment, the specifications of the cylinder head intake element, exhaust element, combustion chamber, and fuel injection element are unconfirmed, and other configurations (cylinder head outline, ignition element, etc.) are confirmed. Assumed. The W / J model 211a has already been created taking into account the hollow portion formed in the cylinder head in order to provide a spark plug as an ignition element, and has a hole in the center. Note that the original model may be changed according to the design change of the entire cylinder head.

  The W / J model 211a does not take into account the cavity elements formed in the cylinder head for the cylinder head intake element, exhaust element, combustion chamber, and fuel injection element, and in relation to these cavity parts. Is roughly created in a range that can be adopted according to the outer shape of the cylinder head.

  As described above, the intermediate model is a W / J model after an overlapping portion with at least one cavity defining model is deleted, and is also a history model at each design change stage of the W / J model. In FIG. 5, the W / J model 211b shows an example of an intermediate model. One of the intermediate models is a W / J model that is finally adopted. The W / J model 211b shows a W / J model close to the final form.

  The cavity defining model DB 212 stores a cavity defining model indicating a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the cavity portion to a three-dimensional shape of the cavity portion formed in the cylinder head. Yes. In this embodiment, each cavity defining model of the intake element, the exhaust element, the combustion chamber, and the fuel injection element is generated as the cavity defining model. Hereinafter, these will be referred to as an intake port model, an exhaust port model, a combustion chamber model, and an injector model in this order. In the case of this embodiment, the cavity defining model is also a model for one cylinder. FIG. 2 shows an example of each cavity defining model (combustion chamber model 212a, intake port model 212b, exhaust port model 212c, injector model 212d). Each cavity defining model is generated for each design change of each component, and the past model of each cavity defining model becomes a history model of each design modification stage. In the present embodiment, it is assumed that four types of cavity defining models are used, but one type may be used according to the user's preference, or a plurality of types other than the four types may be used. In short, the cavity definition model is used for configurations where design changes are frequently made.

  FIG. 4A is an explanatory diagram of an example of generating an intake port model. Model 20 shows a three-dimensional shape model of the outer shape of the hollow portion constituting the intake port (one cylinder, two valves). A model 21 is a three-dimensional shape model in which a wall portion is added to the model 20. In FIG. 6, the model 20 corresponds to the intake port 13, and the model 21 has a three-dimensional shape in which the wall portion 10 b is added within a necessary range of the intake port 13. Models 22 and 23 show three-dimensional shapes obtained by adding the thickness of the wall portion 10b to the three-dimensional shape model of the outer shape of the hollow portion constituting the valve guide and the valve seat, respectively.

  Thus, the intake port model 24 is completed by combining these models 21 to 23. As described above, in this embodiment, the cavity defining model is generated in consideration of not only the shape of the cavity portion but also the thickness of the wall that defines the cavity portion. In this way, the W / J model can be generated in consideration of the wall thickness between the water jacket and the cavity portion of the other component.

  In the W / J model DB 213 for all cylinders, the W / J model W / J showing the three-dimensional shape model of the outer shape of the water jacket for all cylinders generated based on the W / J model stored in the W / J model DB 211. Stores the model. FIG. 2 shows an example of the W / J model 213a for all cylinders. The W / J model 213a for all cylinders shows the W / J model of the cylinder head of the in-line four-cylinder engine. The attached model DB 214 stores models other than the W / J model for one cylinder when generating the W / J model for all cylinders from the W / J model for one cylinder.

  Each DB 211 to 214 can also store each model used in the existing engine design, and can effectively use past design cases. In addition to the graphic information of each model, the stored information includes coordinate information indicating the relative positional relationship between the models. FIG. 4B is an explanatory diagram of this coordinate information. The coordinate information specifies the relative positional relationship of each model in the cylinder head. The reference point of each model with respect to the origin of a certain coordinate axis (W / J model 211a and combustion chamber model 212a in FIG. 4B). The coordinates of (example) are shown.

  The history information DB 215 stores the generation history and correspondence history information of each of the DBs 211 to 214. As will be described later, the design support apparatus 100 can display the generation history (that is, work history) of each model on the display 110 based on the history information.

<Overview of W / J model generation>
In this embodiment, based on the relative positional relationship between the W / J model and the cavity defining model in the cylinder head, a new overlapped portion where the W / J model and the cavity defining model overlap is deleted from the W / J model. A W / J model is generated. FIG. 3 is an explanatory diagram of W / J model generation.

  In the example shown in the figure, the W / J model 211a, which is the original model, overlaps the W / J model 211a and each cavity defining model (combustion chamber model 212a, intake port model 212b, exhaust port model 212c, injector model 212d). The portion is deleted, and the intermediate model W / J model 211b is generated.

  Although it is possible to delete overlapping portions simultaneously for a plurality of cavity defining models, in the present embodiment, a new W / J model is generated from the W / J model and any one of the cavity defining models and stored in the database 211. Store. The association with the cavity definition model used to generate the W / J model is stored in the history information DB 215.

  As a result, an intermediate model of the W / J model is generated in stages for each cavity-defining model, and the past W / J model is used when a design change of some components of the cylinder head occurs. This makes it easier to modify the water jacket model. In this case, preferably, the order in which each cavity defining model is used is defined by its type. This makes it easier to understand the history of each model. In the present embodiment, the combustion chamber model, the intake port model, the exhaust port model, and the injector model are used in this order.

<Design support program>
Next, processing by the design support program executed by the CPU 101 will be described. FIGS. 7A to 7C and FIG. 9 show examples of design support programs. FIG. 7A shows the main process. In S10, the user's selection regarding the type of processing is accepted. Any one of S11 to S14 is executed in response to a user instruction in S10. S11 is a model setting process for one cylinder. Here, a prototype model of the W / J model and specification value generation and generation of the cavity defining model are performed. S12 is a model generation process for one cylinder. Here, an intermediate model of the W / J model is automatically generated. S13 is a W / J model generation process for all cylinders. Here, a W / J model for all cylinders is automatically generated. S14 is a history display process, in which a model generation history display based on the history information stored in the history information DB 215 is performed.

  FIG. 7B is a flowchart of the model setting process for one cylinder in S11. In S21, an instruction from the user is received, and it is determined whether a new model is created or a new model is created by changing an existing model. When creating a new model, the process proceeds to S22, and when creating a new model by changing an existing model, the process proceeds to S23.

  In S22, the selection of the user regarding the type of model to be newly created (the original model of the W / J model, the type of the cavity defining model) is accepted. In S23, the existing W / J model or cavity defining model stored in the W / J model DB 211 or the cavity defining model DB 212 is read according to the user's selection.

  In S24, design information input processing is performed. Here, a user input of design information defining the W / J model or the cavity defining model is accepted. In the case of this embodiment, the design information is input by displaying an input sheet and a graphic for presenting input items to the user on the display 110. FIG. 8 is a diagram showing a display example of an input sheet and a graphic for presenting input items to the user, and illustrates a case where a combustion chamber model is set, but the same applies to other models.

  The input sheet 30 includes a cylinder head specifying column 31, a model specifying column 32, and a design information column 33. In the cylinder head specifying column 31, a code for specifying the cylinder head under design is input. The history information stored in the history information DB 215 is managed in units of codes of the cylinder head, and the same code is attached to each model of the same cylinder head. When the creation of a new model is selected by changing the existing model, this code is automatically input as the same code as the existing model.

  In the model specifying field 32, a code for specifying the model type is input. The model types are a W / J model, a combustion chamber model, an intake port model, an exhaust port model, and an injector model. The code also has a version identifier (ver.03 in the figure). This indicates that the model is the third model (design change second time). When creation of a new model is selected by changing an existing model, the same code as that of the existing model is automatically input as the model type code, and a numerical value obtained by adding one to the version identifier is automatically input.

  The design information field 33 includes a definition part name field, a definition part code field, and a setting value field. The definition part name field and the definition part code field are determined in advance, and the code is shown in the graphic 40 that presents input items to the user for the part corresponding to the code indicated in the definition part code field. . The user defines a model to be newly created by inputting a numerical value in each setting value column. As shown in the example of FIG. 8, the input sheet 30 that defines the cavity defining model includes information that defines the cavity portion and information that defines the wall portion (wall thickness column).

  When a new model is created (via S22), the default value is automatically entered or blank, and when a new model is created by changing an existing model (via S23), the design information of the existing model is automatically entered. Thus, the user can change the automatically input design value. In S24, the above-described coordinate information can also be set.

  Next, returning to FIG. 7B, in S25, a model based on the information input in S24 is generated and displayed on the display 110. In S26, it is determined whether or not the user has instructed to save the model created this time. If storage is not instructed, one unit of processing is terminated, and the model generated in S25 is discarded. When saving is instructed, the process proceeds to S27, and the information input in S24 is stored in the W / J model DB 211 or the cavity defining model DB 212 according to the type of model generated in S25. In S28, the history information in the history information DB 215 is updated based on the information input in S24. Thus, one unit of processing is completed.

  Next, the W / J model generation process for one cylinder in S12 will be described with reference to FIG. FIG. 7C is a flowchart of the W / J model generation process for one cylinder in S12. In S31, the selection of the W / J model by the user is accepted. The user selects one W / J model from the W / J models stored in the W / J model DB 211. In S32, the information of the W / J model selected in S31 is read from the W / J model DB 211 and displayed on the display 110.

  In S33, the selection of the cavity defining model by the user is accepted. The user selects one cavity definition model from the cavity definition models stored in the cavity definition model DB 212. In S34, the information on the cavity defining model selected in S33 is read from the cavity defining model DB 212 and displayed on the display 110.

  In S35, it is determined whether or not there is a duplicate deletion instruction from the user. If there is a duplicate deletion instruction, the process proceeds to S36, and if not, one unit of processing is terminated. In S36, a process for generating a new W / J model is performed. Here, based on the relative positional relationship (the above coordinate information) in the cylinder head between the W / J model read in S32 and the cavity defining model read in S34, the W / J model read in S32 and read in S34. A new W / J model is generated by deleting the overlapping portion overlapping the cavity defining model from the W / J model read in S 32, and displayed on the display 110.

  In S37, it is determined whether or not the user has instructed to save the W / J model generated in S36. If storage is not instructed, one unit of processing is terminated, and the model generated in S36 is discarded. When the save is instructed, the process proceeds to S38, and the W / J model information generated in S38 is stored in the W / J model DB 211. In S39, the history information in the history information DB 215 is updated. The history information includes information associating the W / J model generated in S36 with the W / J model (S32) and the cavity defining model (S34) used to generate the model. Thus, one unit of processing is completed.

  Next, the W / J model generation process for all cylinders in S13 will be described with reference to FIG. First, the W / J model generation process for all cylinders will be outlined with reference to FIG. As described above, in a cylinder head of a multi-cylinder engine, the configuration of each cylinder unit is usually the same or the configuration is inverted (mirrored). Therefore, when generating W / J models for all cylinders, the W / J models for one cylinder are copied or inverted to generate W / J models for the remaining cylinders, and these are synthesized. FIG. 5 shows an example in the case of in-line four cylinders. A W / J model for the # 3 cylinder is created and stored in the W / J model DB 211. Using this, the W / J model for the # 1 and # 2 cylinders is used. / J model (inverted copy of # 3 cylinder W / J model) and # 4 cylinder W / J model (copy without inverting # 3 cylinder W / J model) are generated and connected in the cylinder row direction Has been. Further, a model unique to each cylinder is read from the attached model DB 214 and synthesized, thereby generating W / J models for all cylinders.

  FIG. 9 is a flowchart of the W / J model generation process for all cylinders in S13. In S41, the number of cylinders is set. The number of cylinders is specified by the user. In S42, the selection by the user is accepted for the reference W / J model for one cylinder (hereinafter referred to as the reference W / J model). The user selects one W / J model from the W / J models stored in the W / J model DB 211. The selected reference W / J model is read from the W / J model DB 211 and displayed on the display 110. In S43, the user's selection as to which cylinder the reference W / J model is assigned to is accepted.

  In S44, the remaining cylinder W / J model setting process is performed. Here, the user sets allocation to the remaining cylinders of the W / J model other than the reference W / J model, copy or reverse copy, in units of cylinders. In S45, it is determined whether or not the setting of the W / J models for the number of cylinders set in S41 is completed. If applicable, the process proceeds to S46, and if not, the process returns to S44.

  In S46, the W / J models of the cylinders set in the processes of S42 to S44 are combined and combined in the cylinder row direction. In S47, selection by the user for a model unique to each cylinder is accepted. Here, according to the user's selection, the model is read from the attached model DB 214 and displayed on the display 110. It should be noted that setting of each model stored in the attached model DB 214, setting of a connection position to the W / J model, and the like are performed in advance by the user.

  In S48, the W / J model for all cylinders combined in S46 and the model selected in S47 are combined to generate a W / J model for all cylinders and displayed on the display 110. In S49, it is determined whether or not the user has instructed to save the W / J models for all cylinders generated in S48. When saving is not instructed, one unit of processing is terminated, and the model generated in S48 is discarded. If storage is instructed, the process proceeds to S50, and the W / J model information for all cylinders generated in S48 is stored in the W / J model DB 213 for all cylinders. In S51, the history information in the history information DB 215 is updated. The history information includes the W / J model for all cylinders generated in S48, the W / J model (S42) used to generate the cylinder and the settings for each cylinder (S43, S44), and the attached model. (S47) and information associated with each other are included. Thus, one unit of processing is completed.

  Next, the history display executed in the history display process of S14 will be described. FIG. 10 is a diagram showing a display example of history display on the display 110. The display example of FIG. 10 is divided into a history display area 60 and a toolbar area 61.

  The history display area 60 displays a history of the cavity-defining model and a history of the W / J model (for one cylinder and for all cylinders) with a center arrow 60a (indicating the order of work) as a boundary. .

  The history of the cavity definition model is displayed for each type of cavity definition model, and when generating the intermediate model of the W / J model, it is displayed in the order in which each cavity definition model is used (combustion chamber model ⇒ Intake port model ⇒ exhaust port model ⇒ injector model). In the figure, “ver.01” indicates each model at each stage. For example, in the case of a combustion chamber model, the model “ver.01” is created first, the design is changed from ver.02 → ver.03 → ver.04, and the latest model is ver.05.

  The history of the W / J model is displayed for each of the prototype model (W / J model 0), the intermediate model (W / J models 1 to 4), and the W / J model for all cylinders. W / J model 1 is an intermediate model in which the combustion chamber model is deleted from W / J model 0, and W / J model 2 is an intermediate model in which the intake port model is deleted from W / J model 1 (that is, from W / J model 0). Intermediate model with the combustion chamber model and intake port model deleted), the W / J model 3 with the exhaust port removed from the W / J model 2, and the W / J model 4 with the injector model deleted from the W / J model 3 The intermediate model (final model) is shown.

  In the toolbar area 61, a display button 61a, a corresponding button 61b, a change button 61c, and an automatic reflection button 61d are displayed. The display button 61a is a button for the user to instruct display of the model on the display 110. When the user performs an operation of selecting any model (part of ver. **) and pressing this button, the corresponding model is displayed on the display 110.

  The corresponding button 61b is a button for instructing display of the detailed history of the intermediate model of the W / J model, which W / J model and the cavity defining model generated the W / J model, or which W / J A correspondence relationship indicating whether the W / J model for all cylinders has been generated by the model is displayed. When the user selects one of the W / J models 1 to 4 or the all-cylinder W / J model and presses this button, the correspondence between the models is displayed. For example, the broken line 60b indicates that the W.J model 2 ver.01 model is generated by the W / J model 1 ver.01 and the intake port model ver.01. The broken line 60b indicates that the W.J model 3 ver.01 model is generated by the W / J model 2 ver.01 and the exhaust port model ver.01.

  The change button 61c is a button for the user to instruct a model change. When the user selects any model (part of ver. **) and presses this button, the processing from S24 onward in FIG. 7B is executed. The automatic reflection button 61d is a button for instructing the user to automatically reflect the change of the cavity defining model in the W / J model defined in the subsequent order when a certain cavity defining model is changed. . When the user selects one of the cavity definition models (part of ver. **) and presses this button, the W / J model defined after the cavity definition model is updated.

  For example, the combustion chamber model ver.05 is a model newly generated in the one-cylinder model setting process of FIG. 7B, and the W / J model 1 generated using the combustion chamber model ver.05. 4 to 4 and the case where all cylinder W / J models are not generated. When the user selects ver.05 of the combustion chamber model and presses the automatic reflection button 61d, W / J model 1 in which the combustion chamber model of ver.05 is deleted from the latest version of W / J model 0 is shown in FIG. It is newly generated by the same process as S36 of 7 (c). Subsequently, the W / J model 2 obtained by deleting the latest version of the intake port model from the newly generated W / J model 1 is newly generated by the same processing as S36 in FIG. 7C. Similarly, the W / J model 3, the W / J model 4, and the W / J model for all cylinders are automatically generated using the latest version of the cavity defining model. That is, the W / J model in which the combustion chamber model is replaced with the latest ver. 05 and the W / J model for all cylinders are automatically generated.

  The same applies to the other cavity defining models. For example, when the intake port model is changed and the process by the automatic reflection button 61d is executed, the W / J models 2 to 4 and the W / J models for all cylinders are automatically generated. . Further, when the exhaust port model is changed and the process by the automatic reflection button 61d is executed, the W / J models 3 to 4 and the W / J models for all cylinders are automatically generated. Thus, by providing a function of automatically reflecting changes in some of the cavity defining models in the W / J model, it is possible to greatly reduce the work burden on the user.

<Musubi>
In this embodiment, as described with reference to FIG. 7C (one-cylinder W / J model generation process), a new W / J model is created by deleting the cavity defining model from the W / J model. Generated. When the design of the component of the cylinder head is changed and the shape of the cavity portion is changed, the cavity defining model may be modified to generate a new W / J model again from the original W / J model. The water jacket model can be easily modified in accordance with the design change. Therefore, the design efficiency of the water jacket can be improved.

  In addition, the intake port model, the exhaust port model, the combustion chamber model, and the injector model were cited as the cavity definition model. By this, the water jacket accompanying the design change of the intake element, exhaust element, combustion chamber, and fuel injection element of the cylinder head The model can be easily modified. Furthermore, by adopting a plurality of cavity defining models, it is possible to more easily cope with design changes for each component of the cylinder head.

  Also, performance evaluation, productivity evaluation, etc. are performed with a W / J model for one cylinder of the water jacket, and when a satisfactory result is obtained, a W / J model for all cylinders as an entire model is generated. The design efficiency of the water jacket can be improved.

  In addition, by the model setting process for one cylinder in FIG. 7B, it is possible to generate an original model of a cavity defining model or a W / J model according to a user request.

  In addition, a plurality of types of W / J models (W / J models 1 to 4 in FIG. 10) in which each cavity defining model is deleted step by step are generated and stored. Since it can be used for modeling work, when a design change of some components of the cylinder head occurs, the water jacket model can be easily modified.

  Furthermore, by displaying the W / J model and the cavity defining model on the display 110, each model can be visually verified.

It is a block diagram of the design support system A which can implement the design support method of this invention. It is a figure which shows the example of DB contained in model DB210. It is explanatory drawing of W / J model production | generation. (A) is explanatory drawing of the production | generation of an intake port model, (b) is explanatory drawing of coordinate information. It is explanatory drawing of W / J model generation for all cylinders. 2 is a cross-sectional view of a cylinder head 10. FIG. (A) thru | or (c) is a flowchart which shows the example of a design support program. It is a figure which shows the example of a display with the sheet | seat for input, and the figure which shows an input item to a user. It is a flowchart which shows the example of a design support program. 6 is a diagram illustrating a display example of history display on the display 110. FIG.

A Design support system 100 Design support device 210 Model DB

Claims (9)

A design support method for supporting the design of a water jacket formed on a cylinder head using a computer having at least a database ,
The database includes a W / J model showing a three-dimensional shape of the draft water jacket, and a three-dimensional shape of the wall portion defining the hollow portion added to the three-dimensional shape of the hollow portion formed in the cylinder head. The cavity definition model indicating the dimensional shape is stored in advance,
It said computer includes a first reading step of reading the W / J model from the database,
A second reading step in which the computer reads the cavity defining model from the database;
Based on the relative positional relationship in the cylinder head between the W / J model and the cavity defining model, the computer determines an overlapping portion where the W / J model and the cavity defining model overlap with each other. A W / J model generation step of generating a new W / J model deleted from
A W / J model storing step in which the computer stores the W / J model generated in the W / J model generating step in the database;
Design support method that have a. In the hollow portion,
The design support method according to claim 1, further comprising a hollow portion for constituting at least one of an intake element, an exhaust element, a combustion chamber, and a fuel injection element of the cylinder head. The cylinder head is a cylinder head of a multi-cylinder engine,
The W / J model and the cavity defining model are models for one cylinder,
Claims wherein the computer, based on said W / J wherein W / J model generated in the model generation process, further Yusuke characterized Rukoto the step of generating three-dimensional shape model of the water jacket of all cylinders The design support method according to 1 or 2. The computer further includes an operation unit,
An input step of receiving input of design information defining the hollow portion and the wall portion in response to the operation of the operation portion by the computer ;
A cavity defining model generating step in which the computer generates the cavity defining model based on the design information input in the input step;
The computer storing the cavity definition model generated in the cavity definition model generation step in the database;
Further Yusuke design support method according to any one of claims 1 to 3, wherein Rukoto a.   5. The design support method according to claim 1, wherein there are a plurality of types of the hollow portions, and the hollow defining model is stored in the database for each of the hollow portions. In the W / J model generation step, a new W / J model is generated by the W / J model and any one of the cavity defining models,
In the W / J model storing step, the W / J model generated in the W / J model generating step is associated with the cavity defining model used to generate the W / J model in the database. Store and
6. The design support method according to claim 5, wherein in the first reading step and the second reading step, the W / J model and the cavity defining model are read from the database in accordance with a user selection. The computer further comprises a display,
The computer, design support method according to any one of claims 1 to 6, wherein further having a Rukoto the step of displaying the W / J model and the cavity defined model on the display. A design support program for supporting the design of a water jacket formed on a cylinder head,
On the computer,
A first reading step of reading a W / J model indicating a three-dimensional shape of the draft water jacket from a database;
A second reading step of reading out from the database a cavity defining model indicating a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the hollow portion to a three-dimensional shape of the hollow portion formed in the cylinder head;
Based on the relative positional relationship between the W / J model and the cavity defining model in the cylinder head, a new overlapping portion where the W / J model and the cavity defining model overlap is deleted from the W / J model. A W / J model generating step for generating the W / J model;
A W / J model storage step of storing the W / J model generated in the W / J model generation step in the database;
Design support program to execute A design support device for supporting the design of a water jacket formed on a cylinder head,
First reading means for reading a W / J model indicating a three-dimensional shape of a draft water jacket from a database;
Second reading means for reading out from the database a cavity defining model indicating a three-dimensional shape obtained by adding a three-dimensional shape of a wall portion defining the hollow portion to the three-dimensional shape of the hollow portion formed in the cylinder head;
Based on the relative positional relationship between the W / J model and the cavity defining model in the cylinder head, a new overlapping portion where the W / J model and the cavity defining model overlap is deleted from the W / J model. W / J model generation means for generating the W / J model,
W / J model storage means for storing the W / J model generated in the W / J model generation step in the database;
A design support apparatus characterized by comprising:

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