JP2018096464A - Shift instruction display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely stop a vehicle by displaying an optimum shift instruction when a failure of a braking device occurs. SOLUTION: This is a vehicle shift instruction display device 20 for displaying a shift instruction of a vehicle based on a traveling state of a vehicle traveling by at least the driving force of an engine 10, and a display unit 22 for displaying the shift instruction of the vehicle. The control unit 21 has a control unit 21 for determining a failure of the brake 25 for stopping the vehicle, and when the control unit 21 determines a failure of the brake 25, the control unit 21 causes a shift instruction to shift the shift stage of the vehicle to or less than the current shift stage. Is configured to be displayed on the display unit 22. [Selection diagram] Fig. 1

Description

  The present invention relates to a shift instruction display device for a vehicle that displays a shift instruction on a display unit.

  Patent Document 1 discloses a vehicle display device that makes it easy to notice a warning by displaying a plurality of warning images on a display unit.

Japanese Patent Laying-Open No. 2015-205602

  However, in the vehicular display device described in Patent Document 1, even if the driver notices a warning, it is difficult for the driver to appropriately deal with the warning unless he knows how to deal with the warning. There is a problem that there is.

  SUMMARY OF THE INVENTION An object of the present invention has been made in consideration of the above-described circumstances, and is a vehicle shift instruction display device capable of safely stopping a vehicle by displaying an optimal shift instruction when a braking device malfunctions. It is to provide.

  A shift instruction display device for a vehicle according to the present invention is a shift instruction display device for a vehicle that displays a shift instruction for the vehicle on the basis of at least a traveling state of the vehicle that is driven by the driving force of the engine. A display unit that displays an instruction; and a control unit that determines a failure of a braking device that stops the vehicle, and the control unit determines a gear position of the vehicle when the failure of the braking device is determined. A gear shift instruction for shifting the gears to a gear position lower than or equal to is displayed on the display unit.

  According to the present invention, it is possible to notify the driver of a gear shift instruction to the optimum gear position for safely stopping the vehicle when a brake device failure occurs. When the driver who does not know how to deal with the failure of the device follows the shift instruction, the vehicle can be safely stopped by the braking force of the engine brake.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the motive power system etc. of the vehicle to which one Embodiment in the shift instruction display apparatus of the vehicle which concerns on this invention was applied. FIG. 2 is a block diagram showing a configuration of a shift instruction display device in FIG. 1. The figure which shows an example of the shift instruction | indication of a downshift displayed on the display part of FIG.1 and FIG.2. The flowchart which shows the procedure in which the control part of FIG.1 and FIG.2 displays a shift instruction | indication.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a configuration diagram showing a power system and the like of a vehicle to which an embodiment of a shift instruction display device for a vehicle according to the present invention is applied. As shown in FIG. 1, an output shaft 11 of an engine 10 in a vehicle (for example, a four-wheeled vehicle) is connected to driving wheels 14 via a clutch 12 and a reduction gear 13, and the driving force of the engine 10 is transmitted to the driving wheels 14. Is done. The engine 10 is controlled by an engine control unit 15 based on measurement data from various sensors.

  That is, the engine 10 is provided with a rotation speed sensor 16 for measuring the rotation speed of the crankshaft (not shown) (that is, the engine rotation speed). The vehicle is also provided with a vehicle speed sensor 17 that measures the vehicle speed by detecting the rotational speed (number of rotations) of the drive wheels 14. The vehicle is provided with an accelerator opening sensor 19 that measures the accelerator opening by detecting the operation amount of the accelerator pedal 18. Based on the engine speed data from the above-mentioned speed sensor 16, the vehicle speed data from the vehicle speed sensor 17, the accelerator position data from the accelerator position sensor 19, and the like, the engine control unit 15 determines the throttle position of the throttle valve. The engine 10 is controlled by adjusting the ignition timing of the ignition device and the fuel injection amount of the fuel injector.

  Further, the control unit 21 constituting the engine control unit 15 displays a vehicle shift instruction based on the traveling state of the vehicle traveling by the driving force of the engine 10 (for example, engine speed, vehicle speed, accelerator opening, etc.). 22 is displayed. Accordingly, the control unit 21 and the display unit 22, the above-described rotation speed sensor 16, the vehicle speed sensor 17 and the accelerator opening sensor 19, and a shift position sensor 23 and a brake temperature sensor 24 which will be described later are provided. A display device 20 is configured. The shift instruction display device 20 displays a shift stage for optimizing fuel consumption and a shift stage for safely stopping the vehicle when the brake 25 serving as a braking device for stopping the vehicle breaks down.

  The shift position sensor 23 detects a gear position (shift position) of the transmission (transmission), and detects a gear position based on, for example, a combination of meshing of the transmission gear 13. The brake temperature sensor 24 measures the temperature of the brake 25 by detecting the temperature of the brake pad or the temperature of the hydraulic oil that operates the brake 25. The detection data and measurement data detected and measured by the shift position sensor 23 and the brake temperature sensor 24 are controlled in the same manner as the measurement data from the rotation speed sensor 16, the vehicle speed sensor 17, and the accelerator opening sensor 19, respectively. Is transmitted to the unit 21.

  When the temperature of the brake 25 measured by the brake temperature sensor 24 exceeds a predetermined value and the brake 25 is overheated, the control unit 21 determines that the brake 25 is in a failure state. Furthermore, when determining that the brake 25 has failed, the control unit 21 is based on the engine speed data from the speed sensor 16, the vehicle speed data from the vehicle speed sensor 17, and the accelerator position data from the accelerator position sensor 19. Thus, in order to stop the vehicle by the braking force of the engine brake, a shift instruction for shifting the shift speed of the vehicle to a shift speed lower than the current shift speed is displayed on the display unit 22. This shift instruction is a shift instruction for shifting to a shift stage lower than the current shift stage and a shift instruction for maintaining the current shift stage.

  That is, the control unit 21 predicts the engine speed when the speed of the vehicle is changed to a speed lower than the current speed, and the engine speed is a predetermined value at which the engine 10 can operate normally. When it is determined that the engine speed is equal to or lower than the upper limit engine speed, a shift instruction for shifting to a lower speed than the current speed is displayed on the display unit 22. This shift instruction is, for example, one that displays the number of shift stages as shown in FIG. 3A, or an arrow that indicates a decrease in shift stages as shown in FIG. 3B.

  Further, the control unit 21 predicts the engine speed when the speed of the vehicle is changed to a speed lower than the current speed, and this engine speed is the upper limit engine at which the engine 10 can operate normally. When it is determined that the rotation speed is exceeded, a shift instruction for maintaining the currently set current gear position is displayed on the display unit 22.

The operation of the control unit 21 that determines the failure of the brake 25 as described above and displays the shift instruction on the display unit 22 will be described with reference to FIG.
The control unit 21 processes input signals from the rotation speed sensor 16, the vehicle speed sensor 17, the accelerator opening sensor 19, the shift position sensor 23, and the brake temperature sensor 24, for example, AD conversion processing (S1). Next, the control unit 21 acquires the current gear position detected by the shift position sensor 23 or uses the engine speed data from the speed sensor 16 and the vehicle speed data from the vehicle speed sensor 17 to change the current gear position. A stage is estimated and acquired (S2).

  Next, the control unit 21 calculates the driver's required torque calculated based on the accelerator opening data from the accelerator opening sensor 19, the current shift speed acquired in step S2, and the engine from the rotation speed sensor 16. Based on the rotational speed data, the vehicle speed data from the vehicle speed sensor 17 and the like, a shift stage recommended for optimizing the fuel efficiency of the vehicle is calculated using a preset shift instruction map (S3). After step S3, the control unit 21 determines a shift instruction (upshift instruction, stay instruction, downshift instruction) necessary to set the current shift speed to the recommended shift speed (S4).

  Next, based on the brake temperature data from the brake temperature sensor 24, the control unit 21 determines whether or not the temperature of the brake 25 exceeds a predetermined value and is in a failure state (S5). When it is determined that the brake 25 is not in a failure state and is normal, the control unit 21 causes the display unit 22 to display the shift instruction determined in step S4 (S6).

  When it is determined in step S5 that the brake 25 is out of order, the control unit 21 first uses a current gear stage and a gear ratio of the transmission gear 13 acquired in step S2 and is lower than the current gear stage. The engine speed when shifting to the gear position (the engine speed after shifting to the nth gear position) is calculated and predicted (S7).

  Next, when the control unit 21 determines that the engine speed predicted in step S7 is equal to or lower than the upper limit engine speed at which the engine 10 can operate normally, the control unit 21 determines from the current shift speed acquired in step S2. A shift instruction (downshift instruction) for shifting to a lower gear position is determined as a shift instruction to be displayed on the display unit 22 (S9), and this shift instruction is displayed on the display unit 22 (S6).

  In addition, when the control unit 21 determines that the engine speed predicted in step S7 exceeds the upper limit engine speed at which the engine 10 can operate normally, a shift instruction (stay) for maintaining the current gear position is determined. (Instruction) is determined to be a shift instruction to be displayed on the display unit 22 (S10), and this shift instruction is displayed on the display unit 22 (S6).

  Here, in the case of a vehicle with a manual transmission, the downshift instruction in step S9 is an instruction for a gear position lower than the current gear position where the engine speed does not reach the upper limit engine speed, and is equipped with an automatic transmission. In the case of a vehicle, it is a downshift instruction to L mode or M mode.

With the configuration as described above, the following effects (1) to (3) are achieved according to the present embodiment.
(1) When the failure of the brake 25 occurs, the control unit 21 causes the display unit 22 to display a shift instruction for shifting the vehicle to a shift stage equal to or lower than the current shift stage, so that the optimal shift stage for safely stopping the vehicle. The driver can be clearly notified of the gear shift instruction. For this reason, a driver who does not notice the failure of the brake 25 or a driver who does not know how to deal with the failure of the brake 25 properly operates according to the shift instruction, so that the vehicle is safely stopped by the braking force of the engine brake. Can be made. As a result, the accident rate at the time of failure of the brake 25 and the failure related to the brake 25 can be reduced.

  (2) When the control unit 21 displays on the display unit 22 a shift instruction (downshift instruction) for shifting to a shift stage lower than the current shift stage, the control unit 21 is shifted to a shift stage lower than the current shift stage. On the condition that the engine speed is less than or equal to the upper limit engine speed at which the engine 10 can operate normally. For this reason, it is possible to suppress the vibration of the vehicle due to the fluctuation (increase) in the engine speed that occurs when shifting to a lower gear than the current gear, and the vehicle can be stopped in this state.

  (3) When the control unit 21 determines that the engine speed when the speed is changed to a speed lower than the current speed exceeds the upper limit engine speed at which the engine 10 can operate normally, the current speed is changed. A shift instruction for maintaining the gear is displayed on the display unit 22. For this reason, it is possible to prevent the occurrence of a situation in which an excessive load is applied to the engine 10 due to a sudden increase in the engine speed due to the shift.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. It is included in the scope and gist of the invention, and is included in the invention described in the claims and the equivalent scope thereof.

  For example, in the above-described embodiment, the case of a vehicle in which the driving force is generated only by the engine 10 has been described. However, the present invention may be applied to a vehicle in which the driving force is generated by an electric motor or an engine.

  DESCRIPTION OF SYMBOLS 10 ... Engine, 16 ... Speed sensor, 17 ... Vehicle speed sensor, 19 ... Accelerator opening sensor, 20 ... Shift instruction display device, 21 ... Control part, 22 ... Display part, 23 ... Shift position sensor, 24 ... Brake temperature sensor 25 ... Brake (braking device).

Claims (4)

A vehicle shift instruction display device for displaying a shift instruction for the vehicle based on at least a traveling state of the vehicle traveling by the driving force of the engine,
A display unit for displaying a shift instruction of the vehicle;
A controller that determines a failure of a braking device that stops the vehicle;
The control unit is configured to display, on the display unit, a shift instruction for shifting the shift stage of the vehicle to a current shift stage or less when it is determined that the braking device is malfunctioning. Shift instruction display device. When the control unit determines that the engine speed is less than a predetermined engine speed at which the engine can operate normally when shifting the vehicle speed to a speed lower than the current speed, the control section starts from the current speed. The shift instruction display device for a vehicle according to claim 1, wherein a shift instruction for shifting to a lower shift stage is displayed on the display unit. When the control unit shifts the vehicle gear to a gear lower than the current gear, and determines that the engine exceeds a predetermined engine speed at which the engine can operate normally, the controller shifts the current gear. The shift instruction display device for a vehicle according to claim 1 or 2, wherein a shift instruction to be maintained is displayed on a display unit. 4. The brake device according to claim 1, wherein the brake device is a brake, and the control unit is configured to determine that the brake is in a failure state when a temperature of the brake exceeds a predetermined value. The vehicle shift instruction display device according to any one of the above.

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