JP2021011220A - Fluid pressure control unit - Google Patents

Abstract

To obtain a fluid pressure control unit capable of properly protecting a control board of a fluid pressure control unit of a saddle-riding type vehicle from excess current.SOLUTION: A fluid pressure control unit of a brake system for a saddle-riding type vehicle includes: a fluid pressure control mechanism including a base and a component incorporated into the base to control a brake fluid pressure occurring in the saddle-riding type vehicle; and a control board including a control circuit for controlling behavior of the component. The control circuit is provided with a current fuse which interrupts the control circuit according to a current flowing through the control circuit.SELECTED DRAWING: Figure 5

Description

This disclosure relates to a hydraulic pressure control unit capable of appropriately protecting the control board of the hydraulic pressure control unit of a saddle-mounted vehicle from overcurrent.

Conventionally, a braking system for a saddle-riding vehicle such as a motorcycle includes a hydraulic pressure control unit for controlling a braking force for braking the wheels of the saddle-riding vehicle. Specifically, the hydraulic pressure control unit is a hydraulic pressure control mechanism including a substrate and a component (for example, a control valve) incorporated in the substrate and for controlling the brake fluid pressure generated in the saddle-mounted vehicle. It has. Further, the hydraulic pressure control unit is provided with a control board including a control circuit for controlling the operation of the components of the hydraulic pressure control mechanism (see, for example, Patent Document 1).

JP-A-2018-0008674

By the way, in a saddle-riding vehicle, unlike a vehicle other than a saddle-riding vehicle (for example, a four-wheeled vehicle), for example, the hydraulic pressure control unit may be exposed and attached, and the hydraulic pressure control unit is splashed with water. Cheap. Further, in the hydraulic pressure control unit, since the case accommodating the control substrate is held by the substrate, the temperature inside the case tends to change according to the operation of the component incorporated in the substrate. Therefore, water is easily sucked from the outside to the inside of the case due to the negative pressure generated in the case. Therefore, in the control board of the hydraulic pressure control unit of the saddle-mounted vehicle, a short circuit is likely to occur due to the adhesion of water, and it is desirable to appropriately protect the control board from overcurrent.

The present invention has been made against the background of the above-mentioned problems, and obtains a hydraulic pressure control unit capable of appropriately protecting the control board of the hydraulic pressure control unit of a saddle-riding vehicle from overcurrent.

The hydraulic pressure control unit according to the present invention is a hydraulic pressure control unit of a brake system for a saddle-mounted vehicle, and controls a substrate and a brake hydraulic pressure incorporated in the substrate and generated in the saddle-mounted vehicle. A hydraulic pressure control mechanism including a component for the purpose, and a control board including a control circuit for controlling the operation of the component, and the control circuit includes the control circuit according to a current flowing through the control circuit. A current fuse that cuts off is provided.

In the hydraulic pressure control unit according to the present invention, the control board includes a control circuit that controls a component for controlling the brake hydraulic pressure generated in the saddle-mounted vehicle, and the control circuit includes a current flowing through the control circuit. A current fuse that cuts off the control circuit is provided accordingly. As a result, the control circuit can be appropriately cut off when a short circuit occurs in the control board. Further, since the control circuit can be appropriately cut off, it is possible to prevent the control board from becoming large in size in order to improve the heat resistance of the control board. Therefore, the control board of the hydraulic pressure control unit can be appropriately protected from overcurrent.

It is a schematic diagram which shows the schematic structure of the motorcycle which mounts the brake system which includes the hydraulic pressure control unit which concerns on embodiment of this invention. It is a schematic diagram which shows the schematic structure of the brake system which concerns on embodiment of this invention. It is a perspective view which shows the hydraulic pressure control unit which concerns on embodiment of this invention. It is a perspective view which shows the control board of the hydraulic pressure control unit which concerns on embodiment of this invention. It is a schematic diagram which shows the control board of the hydraulic pressure control unit which concerns on embodiment of this invention, and the component which is connected to the control board. It is a schematic diagram which shows the chip fuse corresponding to an example of the current fuse which concerns on embodiment of this invention.

Hereinafter, the hydraulic pressure control unit according to the present invention will be described with reference to the drawings. In the following, the hydraulic pressure control unit of the brake system for a two-wheeled motorcycle will be described, but the hydraulic pressure control unit according to the present invention is a saddle-riding vehicle other than a two-wheeled motorcycle (for example, It may be used for a braking system of a three-wheeled motorcycle, a buggy vehicle, a bicycle, etc.). The saddle-riding type vehicle means a vehicle on which a rider straddles and rides, and includes a scooter and the like.

Further, in the following, the case where the front wheel braking mechanism and the rear wheel braking mechanism are each one is described, but at least one of the front wheel braking mechanism and the rear wheel braking mechanism may be plural, and One of the front wheel braking mechanism and the rear wheel braking mechanism may not be provided. Further, although the case where the main flow path, the sub flow path and the supply flow path are provided in each braking mechanism is described below, the supply flow path may be omitted from the flow path of each braking mechanism.

Further, the configuration and the like described below are examples, and the hydraulic pressure control unit according to the present invention is not limited to such a configuration and the like.

Further, in the following, the same or similar description is appropriately simplified or omitted. Further, in each figure, the same or similar members or parts are omitted from being given a reference mark or are given the same reference numerals. Further, for the detailed structure, the illustration is simplified or omitted as appropriate.

<Outline configuration of hydraulic pressure control unit>
The schematic configuration of the hydraulic pressure control unit 5 according to the embodiment of the present invention will be described.

The hydraulic pressure control unit 5 is for controlling the braking force for braking the wheels of the saddle-riding vehicle. In the present embodiment, the hydraulic pressure control unit 5 is provided in the brake system 10 of the motorcycle 100 as a saddle-riding vehicle.

First, the overall configuration of the brake system 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a schematic view showing a schematic configuration of a motorcycle 100 equipped with a brake system 10 including a hydraulic pressure control unit 5. FIG. 2 is a schematic view showing a schematic configuration of the brake system 10.

As shown in FIGS. 1 and 2, the brake system 10 is mounted on the motorcycle 100. The motorcycle 100 is rotatably held by the fuselage 1, the handle 2 rotatably held by the fuselage 1, the front wheel 3 rotatably held by the fuselage 1 together with the handle 2, and the fuselage 1. It is equipped with a rear wheel 4. The motorcycle 100 includes, for example, an engine (not shown), and travels using the power output from the engine. The motorcycle 100 may travel using the power output from the motor.

The brake system 10 includes a first brake operation unit 11, a front wheel braking mechanism 12 that brakes the front wheels 3 in conjunction with at least the first brake operation unit 11, a second brake operation unit 13, and at least the second brake operation unit 13. A rear wheel braking mechanism 14 that brakes the rear wheels 4 in conjunction with the above is provided. Further, the brake system 10 includes a hydraulic pressure control unit 5, and a part of the front wheel braking mechanism 12 and a part of the rear wheel braking mechanism 14 are included in the hydraulic pressure control unit 5. The hydraulic pressure control unit 5 is a unit having a function of controlling the braking force applied to the front wheels 3 by the front wheel braking mechanism 12 and the braking force applied to the rear wheels 4 by the rear wheel braking mechanism 14.

The first brake operation unit 11 is provided on the handle 2 and is operated by the rider's hand. The first brake operation unit 11 is, for example, a brake lever. The second brake operating unit 13 is provided at the lower part of the body 1 and is operated by the foot of the rider. The second brake operation unit 13 is, for example, a brake pedal.

Each of the front wheel braking mechanism 12 and the rear wheel braking mechanism 14 is held by a master cylinder 21 having a built-in piston (not shown), a reservoir 22 attached to the master cylinder 21, and a brake pad (not shown). A brake caliper 23 having (not shown), a wheel cylinder 24 provided on the brake caliper 23, a main flow path 25 for circulating the brake liquid of the master cylinder 21 to the wheel cylinder 24, and a brake liquid of the wheel cylinder 24. A sub-flow path 26 for releasing the brake liquid and a supply flow path 27 for supplying the brake liquid of the master cylinder 21 to the sub-flow path 26.

A filling valve (EV) 31 is provided in the main flow path 25. The sub-flow path 26 bypasses between the wheel cylinder 24 side and the master cylinder 21 side with respect to the filling valve 31 in the main flow path 25. The auxiliary flow path 26 is provided with a release valve (AV) 32, an accumulator 33, and a pump 34 in this order from the upstream side. A first valve (USV) 35 is provided between the end of the main flow path 25 on the master cylinder 21 side and the portion to which the downstream end of the sub flow path 26 is connected. The supply flow path 27 communicates between the master cylinder 21 and the suction side of the pump 34 in the sub flow path 26. A second valve (HSV) 36 is provided in the supply flow path 27.

The filling valve 31 is, for example, a solenoid valve that opens in a non-energized state and closes in an energized state. The release valve 32 is, for example, a solenoid valve that closes in a non-energized state and opens in an energized state. The first valve 35 is, for example, a solenoid valve that opens in a non-energized state and closes in an energized state. The second valve 36 is, for example, a solenoid valve that closes in a non-energized state and opens in an energized state.

The filling valve 31, the loosening valve 32, the accumulator 33, the pump 34, the first valve 35, and the second valve 36 correspond to components for controlling the brake hydraulic pressure generated in the motorcycle 100, and the hydraulic pressure control unit 5 include. Further, the operation of these components is controlled by the control board 52 of the hydraulic pressure control unit 5. As a result, the braking force applied to the front wheels 3 by the front wheel braking mechanism 12 and the braking force applied to the rear wheels 4 by the rear wheel braking mechanism 14 are controlled. The control board 52 controls the operation of the above components according to, for example, the running state of the motorcycle 100.

For example, in a normal state, that is, in a state in which the ABS operation or the automatic braking operation described later is not executed, the control board 52 opens the filling valve 31, closes the loosening valve 32, and opens the first valve 35. , The second valve 36 is closed. When the first brake operating unit 11 is operated in this state, the piston (not shown) of the master cylinder 21 is pushed in the front wheel braking mechanism 12, the hydraulic fluid pressure of the wheel cylinder 24 increases, and the brake caliper A brake pad (not shown) of 23 is pressed against the rotor 3a of the front wheel 3, and a braking force is applied to the front wheel 3. When the second brake operation unit 13 is operated, the piston (not shown) of the master cylinder 21 is pushed into the rear wheel braking mechanism 14, the hydraulic fluid pressure of the wheel cylinder 24 increases, and the brake caliper 23 The brake pad (not shown) is pressed against the rotor 4a of the rear wheel 4, and a braking force is applied to the rear wheel 4.

The ABS operation is executed, for example, when the wheels (specifically, the front wheels 3 or the rear wheels 4) are locked or there is a possibility of locking, and the braking force applied to the wheels is applied to the brake operation unit (specifically, the brake operation unit by the rider). Specifically, it is an operation of reducing regardless of the operation of the first brake operation unit 11 or the second brake operation unit 13). For example, in the state where the ABS operation is being executed, first, the control board 52 closes the filling valve 31, opens the loosening valve 32, opens the first valve 35, and closes the second valve 36. .. In this state, the pump 34 is driven by the control board 52, so that the hydraulic pressure of the brake fluid of the wheel cylinder 24 is reduced, and the braking force applied to the wheels is reduced. Then, by closing both the filling valve 31 and the release valve 32 from the above state by the control board 52, the hydraulic pressure of the brake fluid of the wheel cylinder 24 is maintained and the braking force applied to the wheels is maintained. Will be done. After that, the control board 52 opens the filling valve 31 and closes the loosening valve 32, so that the hydraulic pressure of the brake fluid of the wheel cylinder 24 increases, and the braking force applied to the wheels increases.

The automatic braking operation is executed when it becomes necessary to stabilize the posture of the motorcycle 100, for example, when the motorcycle 100 is turning, and is applied to the wheels (specifically, the front wheels 3 or the rear wheels 4). This is an operation in which the braking force to be generated is generated without the operation of the brake operation unit (specifically, the first brake operation unit 11 or the second brake operation unit 13) by the rider. For example, in a state where the automatic braking operation is being executed, the control board 52 opens the filling valve 31, closes the loosening valve 32, closes the first valve 35, and opens the second valve 36. In this state, the pump 34 is driven by the control board 52, so that the hydraulic pressure of the brake fluid of the wheel cylinder 24 increases, and a braking force for braking the wheels is generated.

Here, a more detailed configuration of the hydraulic pressure control unit 5 according to the embodiment of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 3 is a perspective view showing the hydraulic pressure control unit 5. FIG. 4 is a perspective view showing a control board 52 of the hydraulic pressure control unit 5. In FIG. 4, the control board 52 is shown through the case 62 for easy understanding.

As shown in FIGS. 3 and 4, the hydraulic pressure control unit 5 includes a base 51a and a hydraulic pressure control mechanism 51 including a component incorporated in the base 51a and for controlling the brake hydraulic pressure generated in the motorcycle 100. A control board 52 including a control circuit 52a for controlling the operation of the hydraulic pressure control mechanism 51, and a connector portion 53 to which a cable is attached are provided.

The substrate 51a has, for example, a substantially rectangular parallelepiped shape and is made of a metal material. Specifically, a main flow path 25, a sub flow path 26, and a supply flow path 27 are formed inside the base 51a of the hydraulic pressure control mechanism 51, and a filling valve 31, a loosening valve 32, an accumulator 33, and a pump are formed. 34, the first valve 35 and the second valve 36 are incorporated as components for controlling the brake fluid pressure generated in the motorcycle 100. A plurality of ports 61 communicating with each flow path are formed on the outer surface of the base 51a, and a brake fluid pipe connected to the master cylinder 21 or the wheel cylinder 24 is attached to each port 61.

The substrate 51a may be formed of one member or may be formed of a plurality of members. Further, when the substrate 51a is formed of a plurality of members, each component may be separately provided as a member different from each other.

The control board 52 includes a control circuit 52a that controls the operation of the hydraulic pressure control mechanism 51.

The control circuit 52a includes, for example, a power line formed by a conductor printed on the control board 52 and electronic components such as switching elements, resistors, and capacitors provided on the control board 52. The details of the configuration of the control circuit 52a will be described later.

Specifically, the control circuit 52a controls the operation of the component incorporated in the base 51a of the hydraulic pressure control mechanism 51, thereby applying the braking force applied to the front wheels 3 by the front wheel braking mechanism 12 and the rear wheel braking mechanism. The braking force applied to the rear wheel 4 can be controlled by 14. For example, the control circuit 52a causes the above components to perform each operation such as ABS operation or automatic braking operation as described above according to the traveling state of the motorcycle 100.

The control board 52 on which the control circuit 52a is mounted is housed in a case 62 held by the base 51a of the hydraulic pressure control mechanism 51. The case 62 has, for example, a hollow substantially square cylinder shape having an opening on one end side, and is formed of resin. The case 62 is held by the base 51a in a state where the opening of the case 62 is closed by the base 51a. For example, the case 62 may be directly held by the substrate 51a, or may be indirectly held via another member.

Specifically, the connector portion 53 is a portion to which a cable connected to an external device, which is an external device of the hydraulic pressure control unit 5, is attached. The connector portion 53 includes a plurality of pins 63 connected to the cable.

For example, the connector portion 53 includes a tubular portion 62a formed in the case 62 so as to communicate the inner space and the outer space of the case 62, and the plurality of pins 63 are inside the tubular portion 62a. It is located and extends along the extending direction of the tubular portion 62a. Further, one end of the plurality of pins 63 is connected to the control board 52, and the control circuit 52a is electrically connected to the external device via each pin 63.

In the hydraulic pressure control unit 5 according to the present embodiment, the control board 52 can be appropriately protected from overcurrent by devising the control circuit 52a of the control board 52. Details of such a control circuit 52a will be described later.

<Control circuit configuration>
The configuration of the control circuit 52a of the control board 52 of the hydraulic pressure control unit 5 according to the embodiment of the present invention will be described in more detail with reference to FIGS. 5 and 6.

FIG. 5 is a schematic view showing a control board 52 of the hydraulic pressure control unit 5 and components connected to the control board 52. It should be noted that the example shown in FIG. 5 merely shows the circuit configuration of the control circuit 52a in order to facilitate understanding, and in reality, the control circuit 52a has various types such as capacitors. Electronic components may be provided.

As shown in FIG. 5, the control board 52 includes a control circuit 52a and a control unit 52b that controls the supply of electric power to the control circuit 52a.

The control circuit 52a is connected to the external power supply 6 of the hydraulic pressure control unit 5 and the component C1 to be controlled by the hydraulic pressure control mechanism 51, respectively. Specifically, the control circuit 52a includes a positive electrode side line 91 which is a power supply line on the positive electrode side and a negative electrode side line 92 which is a power supply line on the negative electrode side, and one end side of the positive electrode side line 91 and the negative electrode side line 92. The power supply 6 is connected to, and the component C1 is connected to the other end side of the positive electrode side line 91 and the negative electrode side line 92. As a result, a closed circuit including the power source 6 and the component C1 is formed, and the component C1 is driven by the power of the power source 6.

Specifically, the component C1 is a filling valve 31, a loosening valve 32, a pump 34, a first valve 35 or a second valve 36. Although only one component C1 is shown in FIG. 5 for ease of understanding, in reality, the control circuit 52a is formed so that each component C1 is connected to the power supply 6 in parallel with each other. ing. For example, the positive electrode side line 91 is branched so as to be connected to the positive electrode side of each component C1, and the negative electrode side line 92 is branched so as to be connected to the negative electrode side of each component C1. The positive electrode side line 91 and the negative electrode side line 92 may be branched in the control circuit 52a, or may be branched from the control circuit 52a on the power supply 6 side.

A switching element 73 is provided in the control circuit 52a (specifically, the positive electrode side line 91). The switching element 73 is, for example, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), and is a state in which a current flows in the switching element 73 (hereinafter, also referred to as a closed state) and a current by controlling the gate voltage of the switching element 73. Is switched to a state in which is blocked (hereinafter, also referred to as an open state).

The control unit 52b controls the supply of electric power to the control circuit 52a by switching the switching element 73 between the open state and the closed state. A part or all of the control unit 52b is composed of, for example, a microcomputer, a microprocessor unit, or the like. Further, a part or all of the control unit 52b may be configured by, for example, an updatable firmware or the like, or may be a program module or the like executed by a command from a CPU or the like.

The control circuit 52a is provided with connection portions 71 and 72 connected to the external power supply 6 of the hydraulic pressure control unit 5. Specifically, the connecting portion 71 is provided on the positive electrode side line 91 and is connected to the positive electrode side of the power supply 6. Specifically, the connection portion 71 is a portion of the control circuit 52a that is connected to the pin 63 connected to the positive electrode side of the power supply 6 among the plurality of pins 63 of the connector portion 53. Further, the connecting portion 72 is provided on the negative electrode side line 92 and is connected to the negative electrode side of the power supply 6. Specifically, the connection portion 72 is a portion of the control circuit 52a that is connected to the pin 63 connected to the negative electrode side of the power supply 6 among the plurality of pins 63 of the connector portion 53.

A fuse 7 outside the hydraulic pressure control unit 5 (that is, on the vehicle body side) is interposed between the power supply 6 and the connection portion 71. When an overcurrent flows due to a short circuit in the closed circuit including the power supply 6 and the component C1, the fuse 7 on the vehicle body side cuts off the closed circuit (that is, no current flows) by, for example, blowing. To).

Here, the current required to blow the fuse 7 on the vehicle body side may be relatively large. Therefore, depending on only the fuse 7 on the vehicle body side, when a short circuit occurs in the control board 52 of the hydraulic pressure control unit 5, the control circuit 52a of the control board 52 is not quickly cut off, and the control circuit 52a is not properly cut off. Situations can occur. Further, if the dimensions and the like of each component of the control board 52 are designed according to the specifications of the fuse 7 on the vehicle body side in order to improve the heat resistance of the control board 52, the control board 52 becomes large.

Therefore, the control circuit 52a is provided with a current fuse 80 that cuts off the control circuit 52a according to the current flowing through the control circuit 52a as a device for solving the above problem. Specifically, the current fuse 80 cuts off the control circuit 52a by blowing the current when the current flowing through the control circuit 52a exceeds the reference current. The reference current is set to a value larger than the current required to drive the component C1, and is appropriately set according to the heat resistance of the control board 52. From the viewpoint of miniaturizing the control board 52, it is preferable to make the reference current as small as possible and design the dimensions and the like of each component of the control board 52 according to the reference current. As the current fuse 80, for example, a chip fuse 81 or the like is used, as will be described later.

The installation position of the current fuse 80 is not particularly limited, but in the example shown in FIG. 5, the current fuse 80 is provided between the connection portion 71 and the switching element 73 on the positive electrode side line 91. The number of current fuses 80 provided in the control circuit 52a may be plural. Further, a plurality of current fuses 80 may be provided in parallel with each other.

As described above, by providing the current fuse 80 in the control circuit 52a of the control board 52 separately from the fuse 7 on the vehicle body side, the control circuit 52a is appropriately cut off when a short circuit occurs in the control circuit 52a. can do.

From the viewpoint of more appropriately cutting off the control circuit 52a when a short circuit occurs in the control board 52, the current fuse 80 is adjacent to the connection portions 71 and 72 in the conduction path of the control circuit 52a (that is, directly). (Connected) is preferable. In other words, in the conduction path of the control circuit 52a, it is preferable that no other electronic component is interposed between the current fuse 80 and the connecting portions 71 and 72. Here, in the conduction path of the control circuit 52a, when another electronic component is interposed between the current fuse 80 and the connecting portions 71 and 72, it is interposed between the current fuse 80 and the connecting portions 71 and 72. It is preferable that the number of other electronic components is as small as possible. Note that FIG. 5 shows an example in which the current fuse 80 is provided next to the connection portion 71 in the positive electrode side line 91 which is the conduction path of the control circuit 52a, but the current fuse 80 is the continuity of the control circuit 52a. It may be adjacent to the connection portion 72 in the negative electrode side line 92 which is a path.

Here, a specific example of the current fuse 80 will be described with reference to FIG.

FIG. 6 is a schematic view showing a chip fuse 81 corresponding to an example of the current fuse 80.

The chip fuse 81 is a current fuse that can be mounted on a substrate. Specifically, the chip fuse 81 is miniaturized as compared with other current fuses 80 in order to improve the mountability on the substrate. Therefore, by using the chip fuse 81 as the current fuse 80, it is possible to improve the degree of freedom of the mounting position of the current fuse 80 on the control board 52 while reducing the size of the control board 52.

In the example shown in FIG. 6, the chip fuse 81 is provided between the power line 91a and the power line 91b, which are power lines forming the positive electrode side line 91. Specifically, as shown in FIG. 6, the chip fuse 81 includes a base portion 81a, a first electrode 81b, a second electrode 81c, and a connection portion 81d.

The base 81a is formed of an insulating material such as alumina. The first electrode 81b has conductivity, is provided on one end side of the base portion 81a, and is connected to the power line 91a. The second electrode 81c has conductivity, is provided on the other end side of the base portion 81a, and is connected to the power line 91b. The connecting portion 81d has conductivity, and is provided between the first electrode 81b and the second electrode 81c on the surface layer of the base portion 81a. As a result, the power line 91a and the power line 91b are electrically connected via the first electrode 81b, the connecting portion 81d, and the second electrode 81c.

Here, the connecting portion 81d extends along the direction from the first electrode 81b to the second electrode 81c, and the central portion of the connecting portion 81d has a cross section intersecting the extending direction of the connecting portion 81d. A narrow portion 81e having a cross-sectional area smaller than that of other portions is formed. Since the cross-sectional area of the narrow portion 81e is smaller than that of other portions, when a current flows through the connection portion 81d, the electric resistance in the narrow portion 81e increases, and the narrow portion 81e tends to generate heat. .. Therefore, when the current flowing through the connection portion 81d exceeds the reference current, the narrow portion 81e is blown off as shown by the alternate long and short dash line in FIG. 6, and the current does not flow between the power line 91a and the power line 91b. Therefore, when the current flowing through the control circuit 52a exceeds the reference current, the control circuit 52a can be appropriately cut off.

<Effect of hydraulic pressure control unit>
The effect of the hydraulic pressure control unit 5 according to the embodiment of the present invention will be described.

The hydraulic pressure control unit 5 includes a control board 52 including a control circuit 52a that controls the operation of the components of the hydraulic pressure control mechanism 51, and the control circuit 52a includes the control circuit 52a according to the current flowing through the control circuit 52a. A current fuse 80 is provided to cut off the current fuse 80. As a result, when a short circuit occurs in the control board 52 (specifically, a short circuit mainly due to adhesion of water to the control board 52), the control circuit 52a can be appropriately cut off. Further, since the control circuit 52a can be appropriately cut off, it is possible to prevent the control board 52 from becoming large in size in order to improve the heat resistance of the control board 52. Therefore, the control board 52 of the hydraulic pressure control unit 5 can be appropriately protected from overcurrent.

Preferably, in the hydraulic pressure control unit 5, the current fuse 80 cuts off the control circuit 52a by blowing the current when the current flowing through the control circuit 52a exceeds the reference current. As a result, when a short circuit occurs in the control circuit 52a, it is possible to appropriately realize that the control circuit 52a is cut off.

Preferably, in the hydraulic pressure control unit 5, the current fuse 80 is a chip fuse 81 that can be mounted on a substrate. As a result, it is possible to improve the degree of freedom in the mounting position of the current fuse 80 on the control board 52 while reducing the size of the control board 52.

Preferably, in the hydraulic pressure control unit 5, the control circuit 52a is provided with connection portions 71 and 72 connected to the external power supply 6 of the hydraulic pressure control unit 5, and the current fuse 80 is a conduction path of the control circuit 52a. Is provided next to the connecting portions 71 and 72. As a result, when a short circuit occurs in the control circuit 52a, it is possible to prevent the short circuit path from being formed by bypassing the current fuse 80. Here, when the short-circuit path is formed by bypassing the current fuse 80, a situation may occur in which the control circuit 52a is not cut off because the short-circuit current does not flow through the current fuse 80. Therefore, by arranging the current fuse 80 next to the connection portions 71 and 72 in the conduction path of the control circuit 52a, the control circuit 52a can be more appropriately cut off when a short circuit occurs in the control board 52.

The present invention is not limited to the description of embodiments. For example, only some of the embodiments may be implemented.

1 Body, 2 Handles, 3 Front Wheels, 3a Rotor, 4 Rear Wheels, 4a Rotor, 5 Hydraulic Control Unit, 6 Power Supply, 7 Fuse, 10 Brake System, 11 1st Brake Operation Unit, 12 Front Wheel Braking Mechanism, 13 2nd Brake operation part, 14 Rear wheel braking mechanism, 21 Master cylinder, 22 Reservoir, 23 Brake caliper, 24 Wheel cylinder, 25 Main flow path, 26 Sub-flow path, 27 Supply flow path, 31 Fill valve, 32 Loosening valve, 33 Accumulator , 34 Pump, 35 1st valve, 36 2nd valve, 51 Hydraulic control mechanism, 51a base, 52 control board, 52a control circuit, 52b control part, 53 connector part, 61 port, 62 case, 62a tubular part, 63 pin, 71 connection part, 72 connection part, 73 switching element, 80 current fuse, 81 chip fuse, 81a base part, 81b first electrode, 81c second electrode, 81d connection part, 81e narrow part, 91 positive electrode side line, 91a Power line, 91b power line, 92 negative electrode side line, 100 motorcycle, C1 component.

Claims (4)

It is a hydraulic pressure control unit (5) of the brake system (10) for a saddle-riding vehicle (100).
A hydraulic pressure control mechanism (51) including a substrate (51a) and a component incorporated in the substrate (51a) to control the brake fluid pressure generated in the saddle-riding vehicle (100).
A control board (52) including a control circuit (52a) that controls the operation of the component, and
With
The control circuit (52a) is provided with a current fuse (80) that cuts off the control circuit (52a) according to a current flowing through the control circuit (52a).
Hydraulic pressure control unit. The current fuse (80) cuts off the control circuit (52a) by blowing the current when the current flowing through the control circuit (52a) exceeds the reference current.
The hydraulic pressure control unit according to claim 1. The current fuse (80) is a chip fuse (81) that can be mounted on a substrate.
The hydraulic pressure control unit according to claim 2. The control circuit (52a) is provided with connection portions (71, 72) connected to an external power supply (6) of the hydraulic pressure control unit (5).
The current fuse (80) is provided adjacent to the connection portion (71, 72) in the conduction path of the control circuit (52a).
The hydraulic pressure control unit according to any one of claims 1 to 3.

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