JP6610238B2 - Brake regeneration control device - Google Patents

Description

  The present invention relates to a brake regeneration amount control device that can adjust the braking force of a wheel by regeneration means by a driver's operation.

  In a vehicle in which a wheel is driven by a driving force of a motor, this motor is often used as a regenerative unit for braking the wheel to obtain regenerative power. For example, in Patent Document 1, a Decel switch for increasing the deceleration is provided on the front side of the spoke spoke portion, and a Can-Decel switch for reducing the deceleration is provided on the rear side of the spoke portion. (See FIG. 5 of this document).

  According to this configuration, every time the driver operates the Decel switch once, the power source brake (braking by the engine and the motor) is strengthened by one step, and a large braking force and regenerative power can be obtained. On the other hand, each time the Can-Decel switch is operated once, the power source brake is weakened one step at a time, and the vehicle can be driven by inertial force without applying driving force to the wheels. In this way, by operating both switches, it is possible to adjust stepwise (for example, seven steps) to the deceleration in accordance with the driver's intention.

Japanese Patent No. 3714164

  As shown in Patent Document 1, in the configuration in which the deceleration is increased and decreased by operating two switches, the Decel switch and the Can-Decel switch, the switch of the power source brake is currently operated in which of a plurality of stages. While doing so, the driver may become confused, which is very inconvenient. In addition, since two switches are required for the up / down operation of the deceleration, there is a problem that the component cost is likely to be high. In addition, since the deceleration changes stepwise (discontinuously) by the operation of both switches, it may not be possible to accurately set the deceleration desired by the driver.

  Therefore, an object of the present invention is to make it possible to set the braking force of the wheel by the regenerative means to a desired magnitude with a simple configuration.

  In order to solve the above-described problems, in the present invention, when the braking force of a wheel is converted into regenerative power, the regenerative unit provided on the wheel, and when the driver sets the regenerative amount by the regenerative unit to a desired value. A reset signal for resetting the regeneration amount to an initial regeneration amount in response to the operation of the regeneration amount setting switch, and corresponding to the operation time of the operation. And a control means for generating a control signal for controlling the regeneration amount to be determined.

  In the above configuration, the initial regeneration amount is 0, and the regeneration amount can be increased as the operation time of the regeneration amount setting switch becomes longer.

  Alternatively, the initial regeneration amount may be a maximum regeneration amount by the regeneration means, and the regeneration amount may be reduced as the operation time of the regeneration amount setting switch becomes longer.

  In each said structure, it can be set as the structure which sets the said regeneration amount by the said regeneration means to the predetermined reference value at the time of starting of a vehicle.

  Moreover, in each said structure, it can be set as the structure further provided with the notification means to notify the said regeneration amount to a driver | operator.

  According to the present invention, the initial regeneration amount is once reset with the operation of the regeneration amount setting switch, so that the driver can clearly recognize the set value of the regeneration amount by this operation. Further, since the regeneration amount is determined by the operation time of the regeneration amount setting switch, the regeneration amount can be set steplessly, and the driver can obtain a desired regeneration force. Moreover, since both the reset operation and the regeneration amount can be set by operating one switch, the cost of components can be suppressed.

Block diagram of a brake regeneration amount control device according to the present invention Front view showing the paddle switch attached to the steering wheel The figure which shows the relationship between the operation time of a paddle switch, and the integrated value of regeneration amount The flowchart which shows the control flow of a brake regeneration amount control apparatus The figure which shows the relationship between the operation timing of the paddle switch and the regenerative amount The figure which shows the 1st example of regeneration amount control by a brake regeneration amount control apparatus The figure which shows the 2nd example of regeneration amount control by a brake regeneration amount control apparatus It is a figure which shows the display content of the display apparatus of regeneration amount, Comprising: (a) is the display in the position which attached | subjected a in FIG. 5, (b) is the display in the position which attached b in FIG.

  A block diagram of a brake regeneration amount control apparatus according to the present invention is shown in FIG. The brake regeneration amount control device includes a motor that functions as the regeneration means 10 (hereinafter, the same reference numeral as the regeneration means 10) and a paddle switch that functions as the regeneration amount setting switch 11 (hereinafter, the regeneration amount setting switch). 11) and control means 13 provided in the central processing unit 12 for controlling the vehicle are the main constituent elements, mainly electric vehicles, hybrid vehicles, plug-in hybrid vehicles, etc. It can be applied to all vehicles equipped with a motor. The motor 10 includes a motor body 10a and an inverter 10b that controls the motor body 10a.

  A system start switch 14 (corresponding to an ignition key of a conventional automobile) that activates the vehicle is connected to the central processing unit 12, and the brake regeneration amount control device is set by turning on the system start switch 14. Can be activated.

  The motor 10 functions as a drive source that gives a driving amount to a wheel (not shown) during power running, while functioning as a regeneration means 10 that obtains regenerative power from the driving force of the wheel during regeneration and brakes the wheel. It functions as a braking means.

  As shown in FIG. 2, the paddle switch 11 is provided on the rear side of the spoke 15 a of the steering wheel 15. In a state where the driver holds the steering wheel 15, for example, the upper end of the steering wheel 15 is pushed to the near side with the index finger and operated. The operation state (the presence / absence of operation, operation time) of the paddle switch 11 is transmitted to the control means 13 connected to the paddle switch 11. The paddle switch 11 is an example, and other types of switches such as a button switch can be adopted as long as the regeneration amount can be set.

  In response to the operation of the paddle switch 11, the control means 13 issues a reset signal for resetting the regeneration amount to the initial regeneration amount to the regeneration means 10. This initial regeneration amount can be set to 0, for example. The increment of the regeneration amount from the initial regeneration amount 0 is determined by the operation time of the paddle switch 11.

  An example of the relationship between the operation time of the paddle switch 11 and the integrated value of the regenerative amount is shown in FIG. As shown in the figure, the regeneration amount can be increased as the operation time of the paddle switch 11 is increased. The increment of the regeneration amount may be linear with respect to the operation time as shown in a in the figure, or may be a quadratic function with respect to the operation time as shown in b in the figure. Here, the regeneration amount is determined in accordance with the operation time of the paddle switch 11, but an operation force detection mechanism is provided in the paddle switch 11, and the regeneration amount is increased as the operation force of the paddle switch 11 increases. May be.

  A control flow of the brake regeneration amount control device will be described with reference to a flowchart shown in FIG.

  First, the system activation switch 14 (see FIG. 1) is operated to determine whether the system of the vehicle (not shown) is activated (step S1 in this figure). When the system is not in the activated state (N side of S1), the determination is continued until the activated state is reached.

  When the system is in the activated state (Y side of S1), the brake regeneration amount is set to the reference value (step S2 in this figure). This reference value is determined in advance between the regenerative amount between 0 and the maximum value. For example, the regenerative amount is in the vicinity of the center between the regenerative amount between 0 and the maximum value (see FIG. 8A and FIG. 8B). Generally, “BASE” is displayed). As long as the city area or the like is normally operated, the regenerative power can be efficiently recovered and an appropriate magnitude of braking force can be obtained if the regenerative amount remains at this reference value.

  Next, it is determined whether or not the operation time when the driver operates the paddle switch 11 is equal to or longer than a predetermined time (step S3 in the figure). When the operation time is shorter than the predetermined time (including the case where the driver does not operate the paddle switch 11) (N side of S3), the determination of the operation time is continuously performed. As described above, by shifting to the next step (step S4 in the figure) only when the operation time is equal to or longer than the predetermined time, a driver's operation error (such as when the hand touches the paddle switch 11 by mistake) or signal It can be prevented that control for changing the regenerative power of the brake is inadvertently started due to noise or the like.

  On the other hand, when the operation time is equal to or longer than the predetermined time (Y side of S3), a reset signal for resetting the brake regeneration amount to the initial regeneration amount is issued from the control means 13 to the motor 10 (in this figure). Step S4). The initial regeneration amount is determined by operating the operation switch that sets the initial regeneration amount according to the driver's driving characteristics, vehicle usage, etc., or preset at the vehicle shipment stage. can do.

  Further, the control means 13 determines the regeneration amount corresponding to the operation time of the paddle switch 11 (step S5 in the figure). When the initial regeneration amount is 0, the regeneration amount increases as the operation time becomes longer. When the initial regeneration amount is the maximum regeneration amount by the regeneration means, the regeneration amount becomes smaller as the operation time becomes longer. The decision is made as follows.

  Then, in response to the determined regeneration amount, the control means 13 issues a control signal for changing and controlling the regeneration amount to the inverter 10b of the motor 10 (step S6 in this figure). The amount of regeneration by the motor 10 is determined by this control signal.

  After the control signal is transmitted to the motor 10, it is continuously determined whether or not the system is in an activated state (step S7 in the figure). When the system is in the activated state (Y side of S7), it is subsequently determined whether or not the driver has operated the paddle switch 11 (step S3 in this figure). On the other hand, when the system is not already activated, the control flow is terminated (step S8 in the figure).

  FIG. 5 shows the relationship between the operation timing of the paddle switch 11 and the regeneration amount. In this figure, a brake regeneration amount control device that performs control so that the initial regeneration amount is 0 and the regeneration amount increases as the operation time of the paddle switch 11 becomes longer will be described.

Time 0 means the time when the system is started. At that time, the brake regeneration amount is set to the reference value. When ON state by operating the paddle switch 11 at time t _1, the regeneration amount is reset once to zero. When maintaining the ON state from the time _{t 1} to _{t 2,} the regeneration amount _{r 1} corresponding to the operation time _(t 2 -t ₁₎ is determined. When the OFF state to stop the operation of the paddle switch 11, the regeneration amount r ₁ is maintained.

When ON state by operating the paddle switch 11 again at time t _3, the regeneration amount is reset to 0 again. When maintaining the ON state from the time _{t 3} to _{t 4,} the regeneration amount _{r 2} corresponding to the operation time _(t 4 -t ₃₎ are determined. When the OFF state to stop the operation of the paddle switch 11, the regeneration amount r ₂ is maintained as it is.

Furthermore, when the ON state by operating again the paddle switch 11 at time t _5, the regeneration amount is reset to 0 again. When maintaining the ON state from the time _{t 5} to _{t 6,} the amount of regeneration _{r 3} corresponding to the operation time _(t 6 -t ₅₎ is determined. When the OFF state to stop the operation of the paddle switch 11, this regeneration amount r ₃ are maintained as they are.

  A first example of regeneration amount control by the brake regeneration amount control device is shown in FIG. 6, and a second example is shown in FIG. In the first example, the reference value of the brake regeneration amount is set to a predetermined value near the center between 0 and the maximum value, the initial regeneration amount is set to 0, and the regeneration amount increases as the operation time of the paddle switch 11 becomes longer. In the second example, the reference value is defined similarly to the first example, the initial regeneration amount is set to the maximum regeneration amount by the motor 10, and the regeneration amount becomes longer as the operation time of the paddle switch 11 becomes longer. This is a case where control is performed so as to be small.

  As shown in FIG. 6, in the control of the first example, the regeneration amount is a reference value until the paddle switch 11 is operated. As described with reference to FIG. 5, every time the paddle switch 11 is operated to be in the ON state, the regenerative amount once becomes 0 of the initial regenerative amount and then increases corresponding to the operation time (in FIG. 6). See time timing a, b, c, d). The time Δt from when the regenerative amount becomes 0 to the regenerative amount corresponding to the operation time from the initial regenerative amount is very short. For this reason, when the paddle switch 11 is operated to change the regeneration amount, there is no problem that braking force is lost by the regeneration means 10 and braking becomes insufficient.

  As shown in FIG. 7, also in the control of the second example, the regeneration amount is a reference value until the paddle switch 11 is operated. Each time the paddle switch 11 is operated to be in the ON state, the regenerative amount once reaches the maximum regenerative amount by the regenerative means of the initial regenerative amount and then decreases corresponding to the operation time (time timing a in FIG. 7). , B, c). Unlike the control of the first example, the control of the second example is in a state where a high braking force is exhibited at the initial regeneration amount. For this reason, even if the time Δt until the regenerative amount reaches the regenerative amount corresponding to the operation time from the initial regenerative amount is slightly longer than that in the first example, there is no particular problem.

Since the setting of the regeneration amount by operating the paddle switch 11 can be performed in a stepless manner, it may be difficult for the driver to grasp how much the regeneration amount is in the current state. Therefore, for example, a display device as notification means 16 for notifying the driver of the regenerative amount shown in FIG. 8 (hereinafter, the same sign as that of the notification means 16) is provided in the combination meter on the instrument panel. By providing it in a place that is easily visible to the driver, the driver can easily grasp the regeneration amount. At the position a in FIG. 5, the regeneration amount is the reference value, and as shown in FIG. 8A, the display device 16 indicates that the regeneration amount is “BASE” (reference value). Is displayed graphically. Further, at a position denoted by b in FIG. 5, the amount of regeneration is because it is larger than the reference value, the regenerative amount corresponding to the regeneration amount r ₂ to the display device 16 are displayed graphically.

  The above-described embodiment is merely an example, and each component can be used as long as it can solve the problem of the present invention that the braking force of the wheel by the regenerative means 10 can be set to a desired magnitude with a simple configuration. The configuration, arrangement, and the like can be changed as appropriate.

  For example, in the above-described embodiment, the configuration in which the motor 10 is employed as the regenerative unit 10 is illustrated. However, a generator (generator) is provided in addition to a general brake provided on a wheel, and the regenerator 10 It can also be set as the structure made to function as.

10 Regenerative means (motor)
10a Motor body 10b Inverter 11 Regeneration amount setting switch (paddle switch)
12 central processing unit 13 control means 14 system start switch 15 steering 15a spoke 16 notification means (display device)

Claims (5)

Regenerative means provided on the wheel for converting the braking force of the wheel into regenerative power; and
A regeneration amount setting switch that is operated when the driver sets the regeneration amount by the regeneration means to a desired value;
A reset signal for once resetting the regeneration amount to an initial regeneration amount is issued to the regeneration means in accordance with the operation of the regeneration amount setting switch, and the regeneration amount is determined according to the operation time of the operation. Control means for issuing a control signal to be controlled;
Brake regeneration control device.   The brake regeneration amount control device according to claim 1, wherein the regeneration amount is increased as the initial regeneration amount is 0 and the operation time of the regeneration amount setting switch is longer.   2. The brake regeneration amount control device according to claim 1, wherein the initial regeneration amount is a maximum regeneration amount by the regeneration means, and the regeneration amount is decreased as the operation time of the regeneration amount setting switch becomes longer.   The brake regeneration amount control device according to any one of claims 1 to 3, wherein the regeneration amount by the regeneration means is set to a predetermined reference value when the vehicle is started.   The brake regeneration amount control device according to any one of claims 1 to 4, further comprising notification means for notifying a driver of the regeneration amount.

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