JP2018179274A - Control device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of a vehicle for satisfactorily maintaining the durability of a belt of a continuously variable transmission.SOLUTION: A control device of a vehicle includes: a storage part 76 for storing first information I1 relating to the past execution of hydraulic pressure rise control in a vehicle 10; and a belt lifetime calculation part 80 for calculating a lifetime allowance rate L of a transmission belt 54 on the basis of the first information I1 stored in the storage part 76, and inhibits a hydraulic pressure rise control part 74 from executing the hydraulic pressure rise control in the case that the lifetime allowance rate L of the transmission belt 54 calculated by the belt lifetime calculation part 80 is less than a prescribed value V1. Since the execution of the hydraulic pressure rise control is inhibited because of this in the case that the lifetime allowance rate L of the transmission belt 54 calculated by the belt lifetime calculation part 80 on the basis of the information I1 is less than the prescribed value V1, the lifetime allowance rate L of the transmission belt 54 is prevented from being less than the prescribed value V1, and the durability of the transmission belt 54 of a continuously variable transmission 28 is maintained satisfactorily.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a control apparatus for a vehicle that executes hydraulic pressure increase control for temporarily increasing a belt clamping pressure of the continuously variable transmission to suppress belt slippage of a belt type continuously variable transmission. The present invention relates to a technology for suitably maintaining the durability of a transmission belt.

  There is known a control system of a vehicle that executes hydraulic pressure increase control for temporarily increasing the belt clamping pressure of the continuously variable transmission to suppress belt slippage of the belt type continuously variable transmission. For example, the control device for a vehicle described in Patent Document 1 is that. In the vehicle control device of Patent Document 1, slippage of the belt of the continuously variable transmission is suitably suppressed by temporarily raising the belt clamping pressure of the continuously variable transmission by the hydraulic pressure increase control.

Unexamined-Japanese-Patent No. 2015-098892

  By the way, in a vehicle like the above-mentioned patent document 1, the slip of the belt of the continuously variable transmission can be suppressed by temporarily raising the belt clamping pressure of the continuously variable transmission by the hydraulic pressure increase control. For example, since load on the belt of the continuously variable transmission increases when the hydraulic pressure increase control is executed, there is a possibility that the durability of the belt of the continuously variable transmission may be reduced.

  The present invention has been made against the background described above, and an object of the present invention is to provide a control device for a vehicle which suitably maintains the durability of the belt of the continuously variable transmission.

  According to a first aspect of the present invention, there is provided: (a) a hydraulic pressure raising control for temporarily raising the belt clamping pressure of the continuously variable transmission to suppress the slip of the belt of the belt type continuously variable transmission A control device for a vehicle including a belt slip prevention control unit, wherein (b) a storage unit that stores first information related to the execution of the hydraulic pressure increase control in the past by the vehicle; (c) the storage unit Calculating a value related to the life of the belt based on the first information stored in the memory, and (d) a value related to the life of the belt calculated by the calculation unit is less than a predetermined value In this case, the execution of the hydraulic pressure increase control by the belt slip prevention control unit is prohibited.

  According to the first invention, (b) a storage unit for storing first information related to the execution of the hydraulic pressure increase control in the past in the vehicle, and (c) the first information stored in the storage unit Calculating a value related to the life of the belt based on the (d) the belt slip when the value related to the life of the belt calculated by the calculation section is less than a predetermined value The execution of the hydraulic pressure increase control by the prevention control unit is prohibited. Therefore, the value related to the life of the belt is calculated by the calculation unit based on the first information stored in the storage unit, and the calculated value related to the life of the belt is less than a predetermined value In this case, since execution of the hydraulic pressure increase control by the belt slip prevention control unit is prohibited, it is prevented that the value related to the life of the belt becomes less than a predetermined value, and the belt of the continuously variable transmission The durability of is preferably maintained.

While demonstrating the schematic structure of the vehicle to which this invention is applied, it is a figure explaining the control function for various control in a vehicle, and the principal part of a control system. An example of a map used to calculate the life margin ratio of the transmission belt of the continuously variable transmission from the number of times the hydraulic pressure increase control has been executed in the past by the belt life calculation unit provided in the electronic control device of FIG. FIG. FIG. 6 is a flowchart illustrating an example of a function of the hydraulic pressure increase control unit when a condition for executing the hydraulic pressure increase control is satisfied in the hydraulic pressure increase execution condition satisfaction determination unit in the electronic control device of FIG. 1; FIG. 8 is a view showing an electronic control device of a vehicle according to another embodiment of the present invention, illustrating a schematic configuration of the vehicle to which the present invention is applied, and control functions and control systems for various controls in the vehicle. It is a figure explaining an important section. The belt life calculation part provided in the electronic control device of FIG. 4 shows an example of the map used to calculate the life margin ratio of the transmission belt of the continuously variable transmission from the estimated total time when the hydraulic pressure increase control was performed. FIG. FIG. 6 is a flowchart illustrating an example of a function of the hydraulic pressure increase control unit when a condition for executing the hydraulic pressure increase control is satisfied in the hydraulic pressure increase execution condition satisfaction determination unit in the electronic control device of FIG. 4;

  In one embodiment of the present invention, the first information is the number of times the hydraulic pressure increase control has been performed on the vehicle in the past. Therefore, when the hydraulic pressure increase control is performed, the number of times the hydraulic pressure increase control has been performed in the past in the vehicle increases, and the value related to the life of the belt calculated by the calculation unit decreases.

  In one embodiment of the present invention, (a) the hydraulic pressure increase control is belt slip information regarding an area in which belt slippage of the continuously variable transmission is likely to occur, which is received from another vehicle different from the vehicle Control to increase the belt clamping pressure in the vehicle compared to the area where slippage of the belt is less likely to occur in the area where slippage of the belt is likely to occur, and (b) the storage unit is the other Stores the second information related to the hydraulic pressure increase control executed in the area where slippage of the belt of the continuously variable transmission is likely to occur, and (c) the calculation unit stores the second information stored in the storage unit. A value related to the life of the belt after the hydraulic pressure increase control is performed on the vehicle is estimated based on the first information and the second information, and (d) the value estimated by the calculation unit, Execute the hydraulic pressure increase control on the vehicle If the value associated with the life of the belt after is less than the predetermined value, it prohibits the execution of the hydraulic pressure rise control by the belt slip prevention control unit. Therefore, the calculation unit estimates a value related to the life of the belt after the hydraulic pressure increase control is performed on the vehicle based on the first information and the second information stored in the storage unit. If the estimated value related to the life of the belt after the hydraulic pressure increase control is performed on the vehicle is less than a predetermined value, the execution of the hydraulic pressure increase control by the belt slip prevention control unit is prohibited. Therefore, it is prevented that the value related to the life of the belt after the hydraulic pressure increase control is performed in the vehicle becomes less than a predetermined value, and the durability of the belt of the continuously variable transmission is preferably maintained. Be

  In one embodiment of the present invention, the first information is a total of time in which the hydraulic pressure increase control has been executed in the past by the vehicle. Therefore, when the hydraulic pressure increase control is performed, the total time of the hydraulic pressure increase control performed by the vehicle in the past increases, and the value related to the life of the belt estimated by the calculation unit decreases.

  In one embodiment of the present invention, the second information is a time of the hydraulic pressure increase control executed in an area where slippage of the belt of the continuously variable transmission is likely to occur in the past in the other vehicle. For this reason, the hydraulic pressure increase control is performed by the vehicle using the time of the hydraulic pressure increase control performed in an area where slippage of the continuously variable transmission belt is likely to occur in the other vehicle in the past. A value related to the life of the belt can be suitably estimated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a view for explaining a schematic configuration of a vehicle 10 to which the present invention is applied, and a view for explaining main control functions and control systems for various controls in the vehicle 10. In FIG. 1, a vehicle 10 includes an engine 12 functioning as a motive power source, a drive wheel 14, and a power transmission device 16 provided on a power transmission path between the engine 12 and the drive wheel 14. The power transmission device 16 includes, in a case 18 as a non-rotating member, a known torque converter 20 as a fluid type transmission connected to the engine 12, a turbine shaft 22 connected to the torque converter 20, and a turbine shaft 22. The belt-type continuously variable transmission 28 connected to the input shaft 26, and the continuously variable transmission 28 connected to the input shaft 26, and the continuously variable transmission 28 connected to the input shaft 26; The output shaft 30, the reduction gear device 32, the differential gear device 34, etc. are provided. In the power transmission device 16 configured as described above, the power output from the engine 12 includes the torque converter 20, the forward / reverse switching device 24, the continuously variable transmission 28, the reduction gear device 32, the differential gear device 34, etc. It is transmitted to the left and right drive wheels 14 via the drive.

  The torque converter 20 includes a pump impeller 20 p coupled to the engine 12 and a turbine impeller 20 t coupled to the turbine shaft 22. The power transmission 16 includes a mechanical oil pump 38 coupled to the pump impeller 20p. The oil pump 38 is rotationally driven by the engine 12 to shift-control the continuously variable transmission 28 or generate a belt clamping pressure of the continuously variable transmission 28 by using the original pressure of the hydraulic pressure as the vehicle. The hydraulic control circuit 40 provided in 10 is supplied.

  The continuously variable transmission 28 includes a primary pulley 50 having a variable effective diameter, which is an input side member connected to the input shaft 26, and a secondary pulley 52 having a variable effective diameter, which is an output side member connected to the output shaft 30. And a transmission belt (belt) 54 as a transmission element wound between the primary pulley 50 and the secondary pulley 52, and the friction force between the primary pulley 50 and the secondary pulley 52 and the transmission belt 54. Power transmission is performed via a belt clamping force (also referred to as a belt clamping pressure), and power of the engine 12 is transmitted to the drive wheels 14 side.

  Primary pulley 50 has a fixed sheave 50a connected to input shaft 26, and a movable sheave 50b provided so as to be relatively non-rotatable and movable in the axial direction about the axis of input shaft 26 with respect to fixed sheave 50a. The hydraulic actuator 50c is provided with a primary thrust Win (= primary pressure Pin × pressure receiving area) in the primary pulley 50 for changing the V-groove width between the fixed sheave 50a and the movable sheave 50b. Further, secondary pulley 52 is provided with fixed sheave 52a connected to output shaft 30, and movable sheave 52b which can not be relatively rotated about the axial center of output shaft 30 and movable in the axial direction with respect to fixed sheave 52a. And a hydraulic actuator 52c for applying a secondary thrust Wout (= secondary pressure Pout × pressure receiving area) in the secondary pulley 52 for changing the V groove width between the fixed sheave 52a and the movable sheave 52b. The primary pressure Pin is a hydraulic pressure supplied to the hydraulic actuator 50c by the hydraulic control circuit 40, and the secondary pressure Pout is a hydraulic pressure supplied to the hydraulic actuator 52c by the hydraulic control circuit 40. The primary pressure Pin and the secondary pressure out are pulley oil pressures that apply thrusts Win and Wout for pressing the movable sheaves 50b and 52b toward the fixed sheaves 50a and 52a, respectively.

  In the continuously variable transmission 28, the primary thrust Win and the secondary thrust Wout are controlled by controlling the primary pressure Pin and the secondary pressure Pout respectively by a hydraulic control circuit 40 driven by an electronic control unit (control unit) 60 described later. Are each controlled. Thereby, the V groove width between each primary pulley 50 and secondary pulley 52 is changed to change the engagement diameter (effective diameter) of transmission belt 54, and gear ratio γ (= input shaft rotational speed Nin / output shaft rotational speed Nout) is changed, and the frictional force (that is, the belt clamping pressure) between the primary pulley 50 and the secondary pulley 52 and the transmission belt 54 is controlled so that the transmission belt 54 does not slip. That is, by controlling the primary pressure Pin (the primary thrust Win agrees) and the secondary pressure Pout (the secondary thrust Wout agrees) respectively, slippage of the transmission belt 54 is prevented and the actual gear ratio γ becomes the target gear ratio γtgt. Be done. The belt clamping pressure is a belt torque capacity Tcvt which is a torque capacity of the transmission belt 54 in the continuously variable transmission 28.

  As shown in FIG. 1, the vehicle 10 includes an electronic control unit 60 as a controller including a control unit of the vehicle 10 related to control of the continuously variable transmission 28 and the like. The electronic control unit 60 includes, for example, a so-called microcomputer provided with a CPU, a RAM, a ROM, an input / output interface and the like, and the CPU follows a program stored in advance in the ROM while using a temporary storage function of the RAM. By performing signal processing, various controls of the vehicle 10 are executed. The electronic control unit 60 is configured to execute shift control and the like including belt clamping pressure control of the continuously variable transmission 28.

  The electronic control unit 60 is supplied with various input signals detected by each sensor provided in the vehicle 10. For example, a position sensor 66 including a signal representing the vehicle speed V (km / h) detected by the vehicle speed sensor 62, a signal representing an accelerator operation amount θacc (%) detected by the accelerator operation amount sensor 64, a GPS antenna, etc. A signal representing position information Svp of the vehicle 10 on the ground surface or map indicated by a GPS signal or the like is input to the electronic control unit 60.

  Further, various output signals are supplied from the electronic control unit 60 to each device provided in the vehicle 10. For example, a hydraulic control command signal Scvt or the like for hydraulic control regarding the shift of the continuously variable transmission 28 and the belt clamping pressure is supplied from the electronic control unit 60 to each part.

  The continuously variable transmission 70 is configured to achieve the target gear ratio γtgt of the continuously variable transmission 28 while preventing the slip (belt slip) of the transmission belt 54 of the continuously variable transmission 28 from occurring. The shift control for controlling the gear ratio γ of 28 and the belt torque capacity Tcvt (that is, the belt clamping pressure) is executed. Specifically, the transmission control unit 70 applies the accelerator operation amount θacc and the vehicle speed V to a predetermined relationship (for example, a shift map, a belt clamping force map (belt torque capacity map)) to provide a continuously variable transmission. The primary pressure Pin and the secondary pressure for achieving the target gear ratio γtgt of the continuously variable transmission 28 in which the operating point of the engine 12 is on a predetermined optimum line (for example, the optimum engine fuel consumption line) while preventing 28 belt slippage Each hydraulic pressure command (hydraulic control command signal Scvt) of the pressure Pout is determined, and the respective hydraulic pressure commands are output to the hydraulic pressure control circuit 40.

  The hydraulic pressure increase execution condition satisfaction determining unit 72 executes the hydraulic pressure increase control executed by the hydraulic pressure increase control unit (belt slip prevention control unit) 74 described later, during the execution of the shift control executed by the shift control unit 70 described above. It is determined whether the following conditions are satisfied. For example, the hydraulic pressure rise execution condition satisfaction determination unit 72 stores in advance in the navigation system, for example, ○ expressway, ○ motorway, ○ toll road, national road 号, prefectural road 号, urban area, etc. In map information including travel path information, it is not a bad road where slippage is likely to occur on the transmission belt 54 of the continuously variable transmission 28. For example, ○○ expressway, ○○ expressway, ○○ toll road, national route ○○, prefectural road When the vehicle 10 is positioned on a paved road without unevenness, such as 号 No., city area, it is determined that the condition for executing the hydraulic pressure increase control does not hold. Further, when the vehicle 10 is positioned on the rough road, for example, a non-paved traveling path with irregularities, the hydraulic pressure rise execution condition satisfaction determination unit 72 determines that the condition for executing the hydraulic pressure rise control is met. In the hydraulic pressure rise execution condition satisfaction judging unit 72, the condition for executing the hydraulic pressure rise control is satisfied even when the traveling path of the vehicle 10 ahead at a predetermined distance, for example, 100 m to 500 m, is located on the rough road. It is determined that

  The storage unit 76 stores first information I1 related to the vehicle 10 having executed the hydraulic pressure increase control by the hydraulic pressure increase control unit 74 in the past. The first information I1 is, for example, the number K of times the hydraulic pressure increase control has been executed in the past by the vehicle 10, the total time T (sec) of the time in which the hydraulic pressure increase control has been executed in the past by the vehicle 10, and the like.

  When the hydraulic pressure increase control unit 74 determines that the condition for executing the hydraulic pressure increase control is satisfied in the hydraulic pressure increase execution condition satisfaction determination unit 72, the hydraulic pressure increase control prohibition determination unit 78 described later prohibits the execution of the hydraulic pressure increase control. If it is not determined, in order to suppress the slip of the transmission belt 54 of the continuously variable transmission 28, the belt clamping pressure of the continuously variable transmission 28, that is, the belt torque capacity Tcvt is temporarily executed when the shift control is performed. The hydraulic pressure increase control is performed to increase the belt torque capacity Tcvt by a predetermined value set in advance. In the hydraulic pressure increase control unit 74, the hydraulic pressure increase control prohibition determination unit 78 executes the hydraulic pressure increase control even if the hydraulic pressure increase execution condition satisfaction determination unit 72 determines that the condition for executing the hydraulic pressure rise control is satisfied. When it is determined to prohibit, the execution of the hydraulic pressure increase control is prohibited.

  When the belt life calculation unit (calculation unit) 80 determines that the hydraulic pressure increase execution condition satisfaction determination unit 72 determines that the condition for executing the hydraulic pressure increase control is satisfied, transmission is performed based on the first information I1 stored in the storage unit 76. A value related to the life of the belt 54, that is, the life margin L of the transmission belt 54 is calculated. Note that the life allowance ratio L is, for example, a transmission having a usable period T1 in which the transmission belt 54 can be actually used in a state where the strength of the transmission belt 54 is sufficiently satisfied, for example, the manufacturer etc. It is a value (T1 / T2) divided by the usable period T2 in which the belt 54 can be used, and when the above-mentioned life margin ratio becomes smaller than 1, the transmission belt 54 is replaced earlier than the used period T2 set by the manufacturer. There is a need to For example, in the belt life calculation unit 80, the first information I1 stored in the storage unit 76, that is, the number K of times the hydraulic pressure increase control has been executed in the past by the vehicle 10, The life margin ratio L is calculated using 2).

  If the hydraulic pressure increase control prohibition determination unit 78 determines that the hydraulic pressure increase execution condition satisfaction determination unit 72 determines that the condition for executing the hydraulic pressure increase control is satisfied, and the belt life calculation unit 80 calculates the life margin ratio L Based on the life margin ratio L calculated by the belt life calculation unit 80, it is determined whether or not the execution of the hydraulic pressure increase control executed by the hydraulic pressure increase control unit 74 is prohibited. For example, the hydraulic pressure increase control prohibition determination unit 78 executes the hydraulic pressure increase control when the life time margin ratio L calculated by the belt life calculation unit 80 is less than the predetermined value V1 (in the present embodiment, the predetermined value V1 is 1). To prohibit. Further, the hydraulic pressure increase control prohibition determination unit 78 determines that the execution of the hydraulic pressure increase control is not prohibited when the life time margin ratio L calculated by the belt life calculation unit 80 is equal to or more than the predetermined value V1. Further, in the hydraulic pressure rise control prohibition determination unit 78, when the life time margin ratio L is not calculated by the belt life calculation unit 80, that is, the hydraulic pressure rise control executed by the hydraulic pressure rise control unit 74 is the first time. When the first information I1 related to the execution of the hydraulic pressure increase control is not stored, it is determined that the execution of the hydraulic pressure increase control is not prohibited.

  The storage unit 76 updates the first information I1 stored in the storage unit 76 when the hydraulic pressure increase control is executed by the hydraulic pressure increase control unit 74 and thereafter the hydraulic pressure increase control ends. For example, in the storage unit 76, when the hydraulic pressure increase control is executed by the hydraulic pressure increase control unit 74 and thereafter the hydraulic pressure increase control ends, the number K of times the hydraulic pressure increase control has been executed in the past stored in the storage unit 76 is The total time T in which the hydraulic pressure increase control has been executed in the past, which has been stored in the storage unit 76, is increased by one time by the time TA in which the hydraulic pressure increase control is performed in the current hydraulic pressure increase control unit 74.

  FIG. 3 is a flow chart for explaining an example of the function of the hydraulic pressure increase control unit 74 when the condition for executing the hydraulic pressure increase control is satisfied by the hydraulic pressure increase execution condition satisfaction determination unit 72 in the electronic control device 60.

  First, in step (hereinafter, step is omitted) S1 corresponding to the function of the hydraulic pressure increase control prohibition determination unit 78, first information I1 related to the execution of the hydraulic pressure increase control in the past in the storage unit 76, ie, the past It is determined whether the number K of times the hydraulic pressure increase control has been performed is stored. When the determination of S1 is affirmed, S2 corresponding to the function of the belt life calculation unit 80 is executed, but when the determination of S1 is denied, S3 corresponding to the function of the hydraulic pressure increase control unit 74. Is executed. In S2, the life margin ratio L of the transmission belt 54 is calculated using the first life margin conversion map shown in FIG. 2 from the number K of times the hydraulic pressure increase control has been executed in the past. At S3, the hydraulic pressure increase control is executed.

  Next, in S4 corresponding to the function of the hydraulic pressure increase control prohibition determination unit 78, it is determined whether the life time margin ratio L calculated in S2 is equal to or greater than a predetermined value V1, that is, 1 or more. When the determination in S4 is affirmed, that is, when the life margin ratio L is 1 or more, the above S3 is executed, but when the determination in S4 is negative, that is, when the life margin ratio L is less than 1. In S5, which corresponds to the function of the hydraulic pressure increase control unit 74 is executed. In S5, the execution of the hydraulic pressure increase control is prohibited.

  As described above, according to the electronic control unit 60 of the vehicle 10 of the present embodiment, the storage unit 76 stores the first information I1 related to the execution of the hydraulic pressure increase control in the past by the vehicle 10, and the storage unit A belt life calculating unit 80 for calculating a value related to the life of the transmission belt 54 based on the first information I1 stored in 76, that is, a life margin ratio L of the transmission belt 54; When the life allowance ratio L of the transmission belt 54 is less than the predetermined value V1, ie, 1, the execution of the hydraulic pressure increase control by the hydraulic pressure increase control unit 74 is prohibited. Therefore, the life margin ratio L of the transmission belt 54 is calculated by the belt life calculation unit 80 based on the first information I1 stored in the storage unit 76, and the calculated life margin ratio L of the transmission belt 54 is a predetermined value. If it is less than V1, the execution of the hydraulic pressure increase control by the hydraulic pressure increase control unit 74 is prohibited, so that the life time margin ratio L of the transmission belt 54 is prevented from becoming less than the predetermined value V1, and the continuously variable transmission The durability of the 28 transmission belts 54 is suitably maintained.

  Further, according to the electronic control unit 60 of the vehicle 10 of the present embodiment, the first information I1 is the number K of times the hydraulic pressure increase control has been performed in the vehicle 10 in the past. Therefore, when the hydraulic pressure increase control is executed, the number K of times the hydraulic pressure increase control has been performed in the past in the vehicle 10 increases, and the life margin ratio L of the transmission belt 54 calculated by the belt life calculation unit 80 decreases. .

  Next, another embodiment of the present invention will be described. The same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted.

  FIGS. 4 to 6 illustrate an electronic control unit (control unit) 90 of a vehicle 10 according to another embodiment of the present invention. Compared with the electronic control unit 60 of the vehicle 10 of the first embodiment, the electronic control unit 90 of the vehicle 10 of the present embodiment is received from the transceiver 90 in that the vehicle 10 is provided with the transceiver 92 and This embodiment is different from the embodiment 1 in that it is determined whether the condition for executing the hydraulic pressure increase control is established based on information from another vehicle 94 different from the vehicle 10, and the others are substantially the same as the first embodiment. It is the same.

  As shown in FIG. 4, the transmitter-receiver 92 is a device that is present separately from the vehicle 10 and communicates with the center 96 as an external device separate from the vehicle 10. The electronic control unit 90 transmits and receives various types of information to and from the center 96 via the transceiver 92. The center 96 has a function as a server, and receives, processes, stores, and provides various information. As with the vehicle 10, the center 96 transmits and receives various information to and from other vehicles 94a, 94b,... (Hereinafter referred to as other vehicles 94) other than the vehicle 10. The other vehicle 94 basically has the same function as the vehicle 10.

  The information processing unit 98 in FIG. 4 receives the belt slip hazard map MAPbelt possessed by the center 96 from the center 96 via the transmitter / receiver 92, as necessary, after powering on the vehicle 10 such as ignition on. The hazard map MAPbelt includes a plurality of hazard areas A1, A2,... In which belt slippage of the continuously variable transmission 28 has occurred in another vehicle 94 in the past or hydraulic pressure increase control is performed to prevent belt slippage. The map information indicates (hereinafter referred to as a hazard area A), and is belt slip information on an area where belt slip of the continuously variable transmission 28 is likely to occur.

  The hydraulic pressure increase execution condition satisfaction determining unit 100 executes the hydraulic pressure increase control executed by the hydraulic pressure increase control unit (belt slip prevention control unit) 102 described later, during the execution of the shift control executed by the shift control unit 70 described above. It is determined whether the following conditions are satisfied. For example, in the hydraulic pressure rise execution condition satisfaction determination unit 100, when the vehicle 10 is not located in the hazard area A of the hazard map MAPbelt in the hazard map MAPbelt received from the center 96 via the transceiver 92, the hydraulic pressure rise It is determined that the condition for executing control is not established. Further, when the vehicle 10 is positioned in the hazard area A of the hazard map MAPbelt in the hazard map MAPbelt, the hydraulic pressure elevation execution condition satisfaction determination unit 100 determines that the condition for executing the hydraulic pressure elevation control is established. Do. The hydraulic pressure increase execution condition satisfaction determining unit 100 determines that the condition for executing the hydraulic pressure increase control is satisfied even when the hazard area A exists on the traveling path of the vehicle 10 at a predetermined distance, for example, 100 m to 500 m ahead. It is designed to judge.

  If, for example, the information processing unit 98 determines that the vehicle 10 is located in the hazard area A1 and the hydraulic pressure increase execution condition satisfaction determining unit 100 determines that the condition to execute the hydraulic pressure increase control is satisfied, the other vehicle 94 has a hazard map MAPbelt in the past. Data indicating when the vehicle has passed the hazard area A1, for example, information indicating whether or not the hydraulic pressure increase control has been performed when another vehicle 94 has passed the hazard area A1 in the past, or the other vehicle 94 has the hazard area A1 The second information I2 and the like indicating the time TB (sec) of the hydraulic pressure increase control executed in step is received from the center 96, and the travel data within a predetermined period is selected from the travel data among the travel data and the selected travel data Are stored in the storage unit 76.

  When the hydraulic pressure increase control unit 102 determines that the condition for executing the hydraulic pressure increase control is satisfied in the hydraulic pressure increase execution condition satisfaction determination unit 100, the hydraulic pressure increase control prohibition determination unit 104 described later prohibits the execution of the hydraulic pressure increase control. If it is not determined, in order to suppress the slip of the transmission belt 54 of the continuously variable transmission 28, the belt clamping pressure of the continuously variable transmission 28, that is, the belt torque capacity Tcvt is temporarily executed when the shift control is performed. The hydraulic pressure increase control is performed to increase the belt torque capacity Tcvt by a predetermined value set in advance. That is, the hydraulic pressure increase control uses hazard map MAPbelt to avoid belt slippage of continuously variable transmission 28, that is, hazard area A, where belt slippage of continuously variable transmission 28 does not easily occur, namely hazard area A In this control, the belt clamping pressure, that is, the belt torque capacity Tcvt is increased as compared with the other areas. In the hydraulic pressure increase control unit 102, the hydraulic pressure increase control prohibition determination unit 104 executes the hydraulic pressure increase control even if the hydraulic pressure increase execution condition satisfaction determination unit 100 determines that the condition for executing the hydraulic pressure rise control is satisfied. When it is determined to prohibit, the execution of the hydraulic pressure increase control is prohibited.

  When the belt life calculation unit (calculation unit) 106 determines that the hydraulic pressure increase execution condition satisfaction determination unit 100 determines that the condition for executing the hydraulic pressure increase control is satisfied, the first information I1 and the second information stored in the storage unit 76 Based on I2, when the vehicle 10 passes through, for example, the hazard area A1, a value related to the life of the transmission belt 54 after the hydraulic pressure increase control is performed, that is, the life margin L of the transmission belt 54 is estimated. For example, in the belt life calculation unit 106, the first information I1 stored in the storage unit 76, that is, the total time T (sec) of the time when the hydraulic pressure increase control has been executed in the past in the vehicle 10, From the estimated total time Tg (T + TB) (sec) obtained by adding the second information I2, that is, the time TB of the hydraulic pressure increase control previously executed in the hazard area A1 in the other vehicle 94, a second life margin ratio preset The life margin ratio L is estimated using the conversion map (see FIG. 5). In the belt life calculation unit 106, there is no traveling data in which another vehicle 94 travels the hazard area A1 within a predetermined period from the present, for example, in the traveling data received by the information processing unit 98. When the travel data is not stored, the second information is stored in the first information I1 stored in the storage unit 76, that is, from the total time T (sec) of the time in which the hydraulic pressure increase control was executed in the past by the vehicle 10, the second life margin. The life margin ratio L is calculated using the ratio conversion map.

  If the hydraulic pressure increase control prohibition determination unit 104 determines that the hydraulic pressure increase execution condition satisfaction determination unit 100 satisfies the condition to execute the hydraulic pressure increase control, and the belt life calculation unit 106 calculates the life margin ratio L Based on the life margin ratio L estimated by the belt life calculation unit 106, it is determined whether to prohibit the execution of the hydraulic pressure increase control performed by the vehicle 10. For example, in the hydraulic pressure increase control prohibition determination unit 100, when the life time margin ratio L estimated by the belt life calculation unit 106 is less than a predetermined value V1 (in the present embodiment, the predetermined value V1 is 1), the hydraulic pressure increase in the vehicle 10 It is determined that the execution of control is prohibited. Further, the hydraulic pressure increase control prohibition determination unit 100 determines that the vehicle 10 does not prohibit the execution of the hydraulic pressure increase control when the life time margin ratio L estimated by the belt life calculation unit 106 is equal to or more than the predetermined value V1. Further, in the hydraulic pressure increase control prohibition determination unit 100, the latest travel data stored in the storage unit 76 by the information processing unit 98 executes the hydraulic pressure increase control when another vehicle 94 passes the hazard area A1 in the past. When the traveling data is not being executed, it is determined that the vehicle 10 prohibits the execution of the hydraulic pressure increase control.

  FIG. 6 is a flowchart for explaining an example of the function of the hydraulic pressure increase control unit 102 when the condition for executing the hydraulic pressure increase control is satisfied in the hydraulic pressure increase execution condition satisfaction determination unit 100 in the electronic control device 90.

  First, in step (hereinafter, step is omitted) S11 corresponding to the function of the hydraulic pressure increase control prohibition determination unit 104, the latest travel data stored in the storage unit 76 by the information processing unit 98 corresponds to another vehicle 94 in the past. When it passes hazard area A1, it is judged whether it is the travel data which performed the above-mentioned oil pressure rise control. If the determination in S11 is affirmed, that is, if the latest travel data is travel data for which the hydraulic pressure increase control has been executed when passing through the hazard area A1, S12 corresponding to the function of the belt life calculation unit 106 Is executed, but if the determination in S11 is negative, that is, if the latest travel data is travel data for which the hydraulic pressure increase control has not been executed when passing through the hazard area A1, hydraulic pressure increase control S13 corresponding to the function of the unit 102 is executed. In S12, an estimated total time obtained by adding the total time T (sec) in which the hydraulic pressure increase control has been performed in the past by the vehicle 10 and the time TB in the hydraulic pressure increase control which the other vehicle 94 has performed in the hazard area A1 in the past From Tg (T + TB) (sec), the life margin L of the transmission belt 54 is estimated using the second life margin conversion map shown in FIG. In S13, the execution of the hydraulic pressure increase control is prohibited.

  Next, in S14 corresponding to the function of the hydraulic pressure increase control prohibition determination unit 104, it is determined whether the life time margin ratio L estimated in S12 is equal to or more than a predetermined value V1 or 1 or more. When the determination in S14 is negative, that is, when the life margin ratio L is less than 1, the above S13 is executed, but when the determination in S14 is affirmed, that is, the life margin ratio L is 1 or more. In the step S15 corresponding to the function of the hydraulic pressure increase control unit 102 is executed. In S15, the hydraulic pressure increase control is executed.

  As described above, according to the electronic control unit 90 of the vehicle 10 of the present embodiment, the hydraulic pressure increase control uses the hazard map MAPbelt to compare the belt with the vehicle 10 in the hazard area A compared to the area other than the hazard area A. The storage unit 76 stores the second information I2 related to the hydraulic pressure increase control executed by the other vehicle 94 in the hazard area A, and the belt life calculation unit 106 stores the second information I2 in a storage unit. Based on the first information I1 and the second information I2 stored in 76, the life time margin ratio L after the hydraulic pressure increase control is performed in the vehicle 10 is estimated, and is estimated by the belt life calculation unit 106, When the life time margin ratio L after the hydraulic pressure increase control is performed in the vehicle 10 is less than the predetermined value V1, the hydraulic pressure increase control unit 102 prohibits the hydraulic pressure increase control from being performed. Therefore, based on the first information I1 and the second information I2 stored in the storage unit 76, the life margin ratio L after the hydraulic pressure increase control is performed by the vehicle 10 is estimated by the belt life calculation unit 106, and the estimation is performed. When the life time margin ratio L after execution of the hydraulic pressure increase control in the vehicle 10 is less than the predetermined value V1, the hydraulic pressure increase control unit 102 is prohibited from executing the hydraulic pressure increase control. It is prevented that the life time margin L after execution of the hydraulic pressure increase control becomes less than the predetermined value V1, and the durability of the transmission belt 54 of the continuously variable transmission 28 is suitably maintained.

  Further, according to the electronic control unit 90 of the vehicle 10 of the present embodiment, the first information I1 is the total time T in which the hydraulic pressure increase control has been executed in the past by the vehicle 10. For this reason, when the hydraulic pressure increase control is executed, the total time T in which the hydraulic pressure increase control has been performed in the past in the vehicle 10 increases, and the life margin ratio L estimated by the belt life calculation unit 106 decreases.

  Further, according to the electronic control unit 90 of the vehicle 10 of the present embodiment, the second information I2 is the time TB of the hydraulic pressure increase control executed by the other vehicle 94 in the hazard area A in the past. Therefore, using the time TB of the hydraulic pressure increase control previously executed in the hazard area A in another vehicle 94, the life margin ratio L after the hydraulic pressure increase control in the vehicle 10 is suitably estimated. it can.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is also applicable in other aspects.

  For example, in the above embodiment, in the belt life calculation units 80 and 106, for example, the number K of times the hydraulic pressure increase control has been performed in the past in the vehicle 10 or the total time T in which the hydraulic pressure increase control has been performed in the past in the vehicle 10 Although the life margin ratio L is calculated using the above, the life margin ratio L may be calculated from other than the number K of times of execution of the hydraulic pressure rise control and the total time T of execution of the hydraulic pressure rise control. For example, the life margin ratio L may be calculated using the belt clamping pressure when the hydraulic pressure increase control is being performed, that is, the integral value of the belt torque capacity Tcvt.

  Note that what has been described above is merely an embodiment, and the present invention can be implemented in variously modified and improved forms based on the knowledge of those skilled in the art.

10: Vehicle 28: Continuously variable transmission 54: Transmission belt (belt)
60, 90: Electronic control unit (control unit)
74, 102: Hydraulic pressure rise control unit (belt slip prevention control unit)
76: Storage unit 80, 106: Belt life calculation unit I1: First information L: Life time margin ratio (value related to belt life)
Tcvt: Belt torque capacity (belt clamping pressure)
V1: predetermined value

Claims (1)

A control device for a vehicle including a belt slip prevention control unit that executes hydraulic pressure increase control for temporarily raising a belt clamping pressure of the continuously variable transmission to suppress slip of a belt of the belt type continuously variable transmission. ,
A storage unit configured to store first information related to execution of the hydraulic pressure increase control in the past by the vehicle;
A calculation unit that calculates a value related to the life of the belt based on the first information stored in the storage unit;
A control apparatus for a vehicle, wherein execution of the hydraulic pressure increase control by the belt slip prevention control unit is prohibited when the value related to the life of the belt calculated by the calculation unit is less than a predetermined value.

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