JP2019199226A - Brake fluid pressure control device - Google Patents

Abstract

To provide a brake fluid pressure control device which inhibits vibration of the brake fluid pressure control device by improvement of a balance of a centroid set when the device is mounted on a vehicle and achieves improvement of mountability to the vehicle by elimination of a motor.SOLUTION: A brake fluid pressure control device controls a fluid pressure of a brake fluid pressure unit and includes: a housing; multiple solenoid control valves for increasing, decreasing, or maintaining the fluid pressure; an accumulator which temporarily stores a working fluid; and multiple solenoid type pumps which can discharge the working fluid stored in the accumulator. The housing includes: a first surface having a valve attachment part to which the multiple solenoid control valves are attached; and a second surface facing the first surface and having a pump attachment part to which the multiple solenoid type pumps are attached.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a brake fluid pressure control device.

  2. Description of the Related Art Conventionally, there is known a brake fluid pressure control device that performs brake control by controlling the fluid pressure of brake fluid supplied to a braking unit with a fluid pressure circuit. The brake fluid pressure control device includes a fluid pressure unit and an electronic control unit (ECU).

  The hydraulic unit includes a plurality of electromagnetic control valves, a pump, a motor that drives the pump, and the like. The plurality of electromagnetic control valves and motors are controlled and operated by the ECU, and the braking force generated on the wheels is controlled by increasing or decreasing the hydraulic pressure in the brake hydraulic pressure circuit (see, for example, Patent Document 1). .

  The plurality of electromagnetic control valves are mounted on a surface of the housing that faces the surface on which the motor is mounted. Further, at least a part of the piping port to which the piping is connected is formed on a surface that is vertically continuous from the mounting surface of the motor and the mounting surfaces of the plurality of electromagnetic control valves in the housing. The plurality of electromagnetic control valves are arranged in a plurality of rows from the side closer to the surface on which the piping port is formed to the side farther.

  A brake fluid pressure control device mounted on a four-wheeled vehicle usually includes twelve electromagnetic control valves. Generally, a plurality of electromagnetic control valves are mounted on one surface of a housing so that a maximum of four electromagnetic control valves are arranged in one row (see, for example, Patent Document 2). Depending on the arrangement of the plurality of electromagnetic control valves, the length in one direction of one surface of the housing on which the plurality of electromagnetic control valves are mounted is designed.

JP, 2006-203880, A JP 2005-145239 A

Here, the motor is used to give eccentric rotation to the motor shaft and drive the plunger of the pump. However, since the housing of the motor is mounted so as to protrude greatly from the housing of the hydraulic unit, The dimension in the depth direction becomes large. For this reason, it is necessary to provide a considerable space in the depth direction when the brake fluid pressure control device is attached to the vehicle, and there is a problem in the mountability of the brake fluid pressure control device.
Also, when mounting a brake fluid pressure control device on a vehicle, the mounting surface of the motor and the mounting surface of the plurality of electromagnetic control valves usually face sideways, and the surface on which at least some piping ports are formed is upward The brake fluid pressure control device is installed so as to face the direction. When the maximum number of electromagnetic control valves arranged in a row is four as in the conventional brake fluid pressure control device, the size in the height direction of the housing is reduced when the surface on which the piping port is formed is the upper surface. Is difficult. For this reason, the position of the center of gravity of the brake fluid pressure control device becomes high, and the balance when mounted on the vehicle tends to deteriorate. In addition, when the heavy motor is disposed on the front surface of the brake fluid pressure control device, the weight balance in the depth direction of the device is deteriorated and the dimension in the depth direction is increased. As a result, the brake fluid pressure control device tends to vibrate, and the sound vibration may be reduced. In addition, a yaw rate sensor or an acceleration sensor may be mounted on the ECU of the brake fluid pressure control device, but if the brake fluid pressure control device is likely to vibrate, the sensing characteristics of these sensors may be reduced.

  The present invention has been made in view of the above problems, and by improving the mountability of the apparatus on the vehicle by eliminating the motor and improving the balance of the center of gravity when the vehicle is mounted, the brake fluid pressure control apparatus is improved. A brake fluid pressure control device capable of suppressing vibrations is provided.

  According to an aspect of the present invention, there is provided a brake hydraulic pressure control device that controls the hydraulic pressure of a brake hydraulic pressure unit (20), and a housing and a plurality of electromagnetics for increasing, reducing, or holding the hydraulic pressure. A valve mounting portion that includes a control valve, an accumulator that temporarily stores hydraulic fluid, and a plurality of solenoid pumps that can discharge the hydraulic fluid stored in the accumulator, and the housing is mounted with a plurality of electromagnetic control valves There is provided a brake hydraulic pressure control device comprising: a first surface having a first surface; and a second surface having a pump mounting portion on which a plurality of solenoid pumps are mounted to face the first surface.

  As described above, according to the present invention, it is possible to improve the mountability to the vehicle, improve the balance of the center of gravity when the vehicle is mounted, and suppress the vibration of the brake fluid pressure control device.

1 is a circuit diagram showing a configuration example of a brake hydraulic circuit 1 to which a brake hydraulic pressure control device 10 according to an embodiment of the present invention can be applied. It is the perspective view which looked at the brake fluid pressure control device concerning the embodiment from the attachment surface side of the solenoid type pump. It is a disassembled perspective view of the brake fluid pressure control apparatus according to the embodiment. It is the perspective view which showed the internal structure of the housing which concerns on the embodiment with the continuous line. It is explanatory drawing which shows the internal block diagram of the solenoid type pump in the brake fluid pressure control apparatus which concerns on the same embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  With reference to FIG. 1, the brake hydraulic circuit 1 to which the brake hydraulic pressure control device 10 according to the present embodiment can be applied will be briefly described.

  A brake hydraulic circuit 1 shown in FIG. 1 is a hydraulic circuit of a brake system for a four-wheeled vehicle. Such a brake hydraulic circuit 1 is applied to a brake system that amplifies the depressing force of a brake pedal by a driver and transmits it to a wheel cylinder without using a booster. However, the brake system may be an example using a booster.

  The brake hydraulic circuit 1 includes a first hydraulic circuit 28 and a second hydraulic circuit 30 having the same configuration. Brake fluid is supplied from the master cylinder 14 to the first hydraulic circuit 28 and the second hydraulic circuit 30.

  The brake hydraulic circuit 1 controls the hydraulic pressure with one front wheel and one rear wheel at a diagonal position of the vehicle as a set by the first hydraulic circuit 28 and the second hydraulic circuit 30, respectively. It is configured in a mold piping system. The brake system is not limited to the X-type piping system.

  The second hydraulic circuit 30 has the same configuration as the first hydraulic circuit 28. Hereinafter, the first hydraulic circuit 28 will be briefly described, and the description of the second hydraulic circuit 30 will be omitted.

  The first hydraulic circuit 28 includes a plurality of pumps 44aa, 44ba, and 44ca. FIG. 1 shows an example in which three pumps are provided in each of the first hydraulic circuit and the second hydraulic circuit. The first hydraulic circuit 28 includes an accumulator 70a and a damper 75a.

  The pumps 44aa, 44ba, and 44ca are solenoid type pumps, and when the pump coil 83 is excited, the plunger 146 is driven to discharge brake fluid (see FIG. 5). Energization of the pump coil 83 is controlled by an electronic control unit (ECU) 90. The number of solenoid pumps provided in the first hydraulic circuit 28 is not limited to three. The details of the solenoid pump will be described separately with reference to FIG.

  A first pressure sensor 24 is provided in a pipe line communicating with the master cylinder 14. The first pressure sensor 24 detects the internal pressure of the master cylinder 14.

  A second pressure sensor 26a is provided in a pipe line communicating with the wheel cylinder 38a of the hydraulic brake 22a for the right front wheel. The second pressure sensor 26a detects the internal pressure of the wheel cylinder 38a.

  The second pressure sensor 26a may be provided in a conduit communicating with the wheel cylinder 38b of the hydraulic brake 22b for the left rear wheel, and may detect the internal pressure of the wheel cylinder 38b. These pressure sensors can function as a brake fluid pressure control device even if they are not provided in the circuit.

  The first hydraulic circuit 28 includes a plurality of electromagnetic control valves. The plurality of electromagnetic control valves include a normally open type linearly controllable circuit control valve 36a, a normally closed type on / off controlled intake control valve 34a, a normally open type linearly controllable pressure increase valves 58aa, 58ba, Pressure reducing valves 54aa and 54ba that are normally closed and on-off controlled are included.

  The circuit control valve 36a is disposed in a flow path 33a that connects the master cylinder 14 and the discharge side of the solenoid pumps 44a, 44ba, and 44ca. The circuit control valve 36a is linearly controllable, and continuously adjusts the flow path area between the master cylinder 14 and the pressure increasing valves 58aa and 58ba.

  The suction control valve 34a is disposed in a flow path 31a that connects the master cylinder 14 and the suction side of the solenoid pumps 44a, 44ba, and 44ca. The suction control valve 34a communicates or blocks between the master cylinder 14 and the suction side of the solenoid pumps 44a, 44ba, and 44ca.

  The pressure increasing valves 58aa and 58ba are disposed in flow paths 51aa and 51ba connecting the circuit control valve 36a and the wheel cylinders 38a and 38b. The pressure increasing valves 58aa and 58ba are linearly controllable, and from the master cylinder 14 and the circuit control valve 36a side, the wheel cylinder 38a side of the hydraulic brake 22a for the right front wheel and the wheel cylinder 38b of the hydraulic brake 22b for the left rear wheel. Continuously adjust the flow rate of hydraulic fluid to

  The pressure reducing valves 54aa and 54ba are disposed in flow paths 53aa and 53ba connecting the suction sides of the solenoid pumps 44a, 44ba and 44ca and the wheel cylinders 38a and 38b. The pressure reducing valves 54aa, 54ba communicate or block between the suction side of the solenoid pumps 44aa, 44ba, 44ca and the wheel cylinders 38a, 38b. The pressure reducing valves 54aa and 54ba reduce the pressure by supplying the hydraulic oil supplied to the wheel cylinder 38a of the hydraulic brake 22a for the right front wheel to the accumulator 71a in the open state. By intermittently repeating opening and closing of the pressure reducing valves 54aa and 54ba, the flow rate of the hydraulic oil flowing from the wheel cylinders 38a and 38b to the accumulator 71a can be adjusted.

  The driving of these electromagnetic control valves is controlled by the ECU 90. Each electromagnetic control valve cannot be linearly controlled, and may be either a normally closed type or a normally open type.

  The second hydraulic circuit 30 controls the hydraulic brake 22c for the left front wheel and the hydraulic brake 22d for the right rear wheel. The second hydraulic circuit 30 replaces the wheel cylinder 38a of the hydraulic brake 22a for the right front wheel in the description of the first hydraulic circuit 28 with the wheel cylinder 38c of the hydraulic brake 22c for the left front wheel. The configuration is the same as that of the first hydraulic circuit 28 except that the wheel cylinder 38b of the pressure brake 22b is replaced with the wheel cylinder 38d of the hydraulic brake 22d for the right rear wheel.

  Next, with reference to FIG.2 and FIG.3, the whole structure of the brake fluid pressure control apparatus 10 which concerns on this embodiment is demonstrated.

  FIG. 2 is a perspective view of the brake fluid pressure control device 10 as viewed from the mounting surface side of the solenoid pumps 44aa, 44ba, 44ca, 44ab, 44bb, 44cb and the accumulators 70a, 70b. FIG. 3 is an exploded view of the brake fluid pressure control device 10. 2 and 3, the illustration of the ECU 90 is omitted.

  The illustrated brake hydraulic pressure control device 10 is a device for controlling the braking force of each wheel of a four-wheeled vehicle. The brake fluid pressure control device 10 includes a fluid pressure unit 20 and an ECU 90. The hydraulic unit 20 is formed with the brake hydraulic circuit 1 shown in FIG.

The hydraulic unit 20 includes a housing 110.
Six solenoid pumps 44aa, 44ba, 44ca, 44ab, 44bb, 44cb and two accumulators 70a, 70b are mounted on the first surface 110a of the housing 110. Solenoid pumps 44aa, 44ba, 44ca, 44ab, 44bb, and 44cb are mounted such that plunger 146 faces a second surface that opposes the first surface of housing 110. Hereafter, four surfaces that are vertically continuous from the first surface 110a and the second surface 110b are respectively referred to as a third surface 110c, a fourth surface 110d, a fifth surface 110e, and a sixth surface 110f. To do.

The accumulators 70a and 70b incorporate check valves 71a and 71b, pistons 72a and 72b, and elastic bodies 73a and 73b for biasing the pistons, and accumulator bores 139a and 139b provided in the housing are closed by covers 74a and 74b. Configured.
In addition, piping ports 121a and 121b connected to the master cylinder are formed on the first surface 110a.

  The accumulators 70a and 70b, the piping ports 121a and 121b, and the solenoid pumps 44aa, 44ba, 44ca, 44ab, 44bb, and 44cb are arranged from the first row L1 to the fourth row L4 from the side closer to the third surface 110c to the side farther. It is divided and divided. In the first row L1, accumulators 70a and 70b are arranged. In the second row, the piping ports 121a and 121b are arranged outside the accumulators 70a and 70b in the width direction of the hydraulic unit. Of the six solenoid pumps in the third row, the solenoid pumps 44aa, 44ba, 44ca provided in the first hydraulic circuit are provided, and the solenoid type provided in the second hydraulic circuit in the fourth row. Pumps 44ab, 44bb and 44cb are arranged.

The solenoid pump is divided into two rows of a third row and a fourth row, and the third row and the fourth row are arranged so as to be shifted from each other in the arrangement direction. Specifically, the solenoid pump 44bb provided in the second hydraulic circuit is provided between the solenoid pumps 44aa and 44ba provided in the first hydraulic circuit. 44cb is disposed between solenoid pumps 44ba and 44ca provided in the first hydraulic circuit.
Therefore, the pump coils 83bb and 83cb corresponding to the solenoid type pumps 44bb and 44cb are arranged in the valleys of the pump coils 83aa, 83ba and 83ca corresponding to the solenoid type pumps 44aa, 44ba and 44ca arranged in the third row, respectively. (See FIG. 3), the height (H) between the third surface 110c and the sixth surface 110f can be made compact.

  The six solenoid pumps are mounted on the housing 110 with the plunger protruding from the second surface 110 b of the housing 110. The protruding plunger is accommodated inside pump coils 83aa, 83ba, 83ca, 83ab, 83bb, 83cb built in the ECU housing. Details will be described with reference to FIG.

  Twelve electromagnetic control valves are mounted on the second surface 110 b of the housing 110. The ECU housing 90b houses an electromagnetic valve coil that drives the electromagnetic control valve, a pump coil that drives the six solenoid pumps, an electromagnetic control valve, and an ECU that controls the operation of the solenoid pump, and the ECU housing 90b. The opening is attached to the second surface of the housing 110 by applying an adhesive or the like.

  The twelve electromagnetic control valves include two circuit control valves 36a and 36b, two suction control valves 34a and 34b, four pressure increasing valves 58aa, 58ba, 58ab and 58bb, and four pressure reducing valves 54aa, 54ba and 54ab. , 54bb. The twelve electromagnetic control valves have one end fixed to the second surface by caulking or the like, and when the ECU housing 90b is fixed to the second surface, the main body of the twelve electromagnetic control valves is formed in a sleeve shape. The 12 corresponding solenoid valve coils 61a, 61b, 62aa, 62ba, 62ab, 62bb, 63a, 63b, 64aa, 64ba, 64ab, 64bb are accommodated inside.

  Accordingly, the 12 coils 61a, 61b, 62aa, 62ba, 62ab, 62bb, 63a, 63b, 64aa, 64ba, 64ab, and 64bb are also arranged in two rows in the ECU housing 90b in the same manner as the 12 electromagnetic control valves. The

  On the third surface 110c, four piping ports 123a, 123b, 123c, and 123d to which piping connected to the wheel cylinder is connected are formed.

  FIG. 4 is an explanatory diagram showing a configuration example of the housing 110 of the hydraulic unit 20. FIG. 4 is a perspective view showing the internal configuration of the housing 110 with a solid line, as viewed from the side where a plurality of electromagnetic control valves are attached.

  The housing 110 is made of a light metal such as aluminum or a metal. The housing 110 is formed with an internal flow path that is a flow path for the brake fluid. Moreover, the housing 110 has a plurality of attachment portions in which a solenoid pump, an electromagnetic control valve, and an accumulator are arranged. Each attachment portion is a cylindrical or trapezoidal recess formed in the housing 110 by, for example, drilling.

  The housing 110 has piping ports 121a and 121b as attachment portions on the first surface 110a. The piping port 121a is connected with piping for connecting the master cylinder and the first hydraulic circuit 28, and the piping port 121b. A pipe that connects the master cylinder and the second hydraulic circuit 30 is connected to the pipe. The third surface 110c has a plurality of piping ports 123a, 123b, 123c, and 123d as attachment portions, and piping connected to a wheel cylinder of a hydraulic brake for the right front wheel is connected to the piping port 123a. A pipe connected to the wheel cylinder of the hydraulic brake for the left rear wheel is connected to the pipe port 123b. A pipe connected to the wheel cylinder of the hydraulic brake for the left front wheel is connected to the pipe port 123c. A pipe connected to a wheel cylinder of a hydraulic brake for the right rear wheel is connected to the pipe port 123d.

  The housing 110 has pump mounting portions 143aa, 143ba, 143ca, 143ab, 143bb, 143cb as mounting portions on the first surface 110a. A solenoid-type pump 44aa is attached to the pump attachment portion 143aa of the first surface 110a, a solenoid-type pump 44ba is attached to the pump attachment portion 143ba, and a solenoid-type pump 44ca is attached to the pump attachment portion 143ca. The solenoid-type pump 44ab is attached to 143ab, the solenoid-type pump 44bb is attached to the pump attachment portion 143bb, and the solenoid-type pump 44cb is attached to the pump attachment portion 143cb.

  The housing 110 has accumulator bores 139a and 139b as attachment portions on the first surface 110a. Accumulators 71a and 71b are assembled to the accumulator bores 139a and 139b, respectively. The accumulators 70a and 70b are composed of check valves 71a and 71b for preventing the backflow of brake fluid, pistons 72a and 72b, elastic members 73a and 73b for biasing the pistons, and covers 74a and 74b. Accumulator 70a, 70b by inserting check valves 71a, 71b, pistons 72a, 72b, and elastic members 73a, 73b into accumulator bores 139a, 139b and attaching covers 74a, 74b to the openings of accumulator bores 139a, 139b. Is configured.

  The housing 110 has valve mounting portions 131a to 131d, 133a to 133b, 135a to 135b, and 137a to 137d to which a plurality of electromagnetic control valves are mounted as mounting portions on the second surface 110b.

  A pressure increasing valve 58aa for supplying brake fluid to the wheel cylinder of the hydraulic brake for the right front wheel is attached to the valve mounting portion 131a. The valve mounting portion 131b is mounted with a pressure increasing valve 58ba that supplies brake fluid to the wheel cylinder of the hydraulic brake for the left rear wheel. A pressure increasing valve 58ab for supplying brake fluid to the wheel cylinder of the hydraulic brake for the left front wheel is attached to the valve mounting portion 131c. A pressure increasing valve 58bb for supplying brake fluid to the wheel cylinder of the hydraulic brake for the right rear wheel is attached to the valve mounting portion 131d.

  A circuit control valve 36a of the first hydraulic circuit 28 is mounted on the valve mounting portion 133a. A circuit control valve 36b of the second hydraulic circuit 30 is mounted on the valve mounting portion 133b. A suction control valve 34a of the first hydraulic circuit 28 is mounted on the valve mounting portion 135a. A suction control valve 34b of the second hydraulic circuit 30 is mounted on the valve mounting portion 135b.

  The valve mounting portion 137a is mounted with a pressure reducing valve 54aa that discharges brake fluid from the wheel cylinder of the hydraulic brake for the right front wheel. The valve mounting portion 137b is mounted with a pressure reducing valve 54ba that discharges brake fluid from the wheel cylinder of the hydraulic brake for the left rear wheel. The valve mounting portion 137c is mounted with a pressure reducing valve 54ab that discharges brake fluid from the wheel cylinder of the hydraulic brake for the left front wheel. The valve mounting portion 137d is mounted with a pressure reducing valve 54bb for discharging brake fluid from the wheel cylinder of the hydraulic brake for the right rear wheel.

  The arrangement of a plurality of electromagnetic control valves in the brake fluid pressure control device 10 according to the present embodiment will be described with reference to FIGS. 3 and 4.

  The plurality of electromagnetic control valves are arranged separately in the first row L1 'and the second row L2' from the side closer to the third surface 110c in the second surface 110b to the side farther from the side. A total of six electromagnetic control valves including four pressure increasing valves 58aa, 58ba, 58ab, and 58bb and two circuit control valves 36a and 36b are arranged in the first row L1 '.

  In the second row L2 ', a total of six electromagnetic control valves including four pressure reducing valves 54aa, 54ba, 54ab, 54bb and two suction control valves 34a, 34b are arranged.

  In the brake fluid pressure control apparatus 10 according to the present embodiment, six electromagnetic control valves are arranged in the first row L1 ′ of the housing 110, so that a total of twelve electromagnetic control valves are arranged in two rows. Yes. For this reason, the distance H between the third surface 110c and the sixth surface 110f is shorter than the distance W between the fourth surface 110d and the fifth surface 110e. Normally, the brake fluid pressure control device 10 is mounted on the vehicle so that the third surface 110c on which the piping port is formed is positioned above, so that it is higher than the width (W) of the brake fluid pressure control device 10. (H) becomes shorter.

  In a normal brake fluid pressure control device, the position of the center of gravity of the brake fluid pressure control device in which a motor, an ECU, a pump, and the like are assembled is relatively low. For this reason, although the support of the brake fluid pressure control device fixed to the bracket for mounting on the vehicle via the support member can be unstable, the brake fluid pressure control device 10 according to the present embodiment is driven by a motor. Instead of using a plunger pump, a solenoid type pump is used, and a plurality of solenoid valves are arranged above and a plurality of solenoid type pumps are arranged below it. The vibration of the pressure control device 10 is suppressed, and the sound vibration is improved.

  The ECU 90 of the brake fluid pressure control device 10 may be provided with a yaw rate sensor or an acceleration sensor used for brake control such as ESP (Electronic Stability Program). In the brake fluid pressure control device 10 according to the present embodiment, since vibration is suppressed, the sensing characteristics of these yaw rate sensors or acceleration sensors can be improved.

  Further, in the brake fluid pressure control device 10 according to the present embodiment, since the length in the width (W) direction is increased, the vibration stability when the brake fluid pressure control device is attached can be further improved.

  In the brake fluid pressure control apparatus 10 according to the present embodiment, the circuit control valves 36a and 36b arranged in the first row L1 ′ of the second surface 110b are outside the four pressure increasing valves 58aa, 58ba, 58ab, and 58bb. That is, it arrange | positions so that these pressure increase valves may be pinched | interposed.

  Since the circuit control valves 36a, 36b and the pressure increasing valves 58aa, 58ba, 58ab, 58bb are arranged in the same row, the height (H) dimension of the brake hydraulic pressure control device is designed in the design of the pipeline formed in the hydraulic pressure unit. Can be further suppressed. Further, since the circuit control valves 36a and 36b are located outside the two pressure increasing valves 58aa, 58ba, 58ab, and 58bb, the complexity of the hydraulic circuit formed inside the housing 110 is reduced. Thereby, it is suppressed that the housing 110 becomes large too much.

  Further, in the brake hydraulic pressure control device 10 according to the present embodiment, the suction control valves 34a and 34b arranged in the second row L2 ′ of the second surface 110b are the four pressure reducing valves 54aa, 54ba, 54ab, and 54bb. Arranged outside. This arrangement also contributes to reducing the complexity of the hydraulic circuit formed inside the housing 110, as in the first row L1 '.

The operation of the solenoid type pump of the present invention will be described with reference to FIG.
In FIG. 5, the structure of one solenoid pump 44 and the corresponding pump coil 83 is shown, but the other solenoid pumps and pump coil 83 have the same structure.
The solenoid type pump 44 has a pump body 145 and a plunger 146 that engages with the pump body 145. The pump coil 83 includes a fixed core 147 that guides the plunger 146 and is fixed to the pump coil opening, a movable core 148 disposed at a rear portion (bottom of the pump coil) of the fixed core 147, and the movable core 148 and the fixed core. And a bobbin 149 disposed so as to surround the core 147.

  The pump body 145 contacts the pump housing 145a, the filter 145b provided to cover the opening of the pump housing 145a, the pump chamber 145c provided inside the pump housing, and the pump element 145e that moves in conjunction with the plunger 146. Then, a suction valve 145d provided at the opening of the pump housing, a discharge valve 145f provided at the discharge port at the bottom of the pump housing 145a, and a valve attached to the opening of the pump mounting portion 143 and energizing the discharge valve 145f A pump cover 144 that houses the spring 145fb. Each of the suction valve 145d and the discharge valve 145f is a valve that prevents backflow. The suction valve 145d includes a spherical valve body 145da and a valve spring 145db that biases the valve body 145da in the valve closing direction. The valve 145f includes a spherical valve body 145fa and a valve spring 145fb that urges the valve body 145fa in the valve closing direction.

The plunger 146 is held so as to be movable in the axial direction by a fixed core 147 formed in a sleeve shape and a seal ring 150 provided in a pump coil side opening of the pump mounting portion 143.
The bobbin 149 has a hollow bottomed hole, and a movable core 148 is accommodated in the bottom of the bottomed hole so as to be movable in the axial direction. A coil assembly 149a is accommodated in the bobbin 149.

  When the coil assembly 149a is excited, a magnetic circuit is formed, and the movable core 148 is drawn downward in FIG. Pressed by the movable core 148, the plunger 146 moves to the pump chamber 145c side. As the volume of the pump chamber 145c decreases, the pressure of the pump chamber 145c increases, the valve body 145fa of the discharge valve 145f moves outward, and the discharge valve 145f opens. The hydraulic fluid in the pump chamber 145c flows to the discharge valve 145f and flows out to the brake pipe connected to the pump discharge side.

  Subsequently, when the coil assembly 149a is demagnetized, the plunger 146 and the movable core 148 are retracted by the biasing force of the plunger spring 146a. As the volume of the pump chamber 145c increases, the pump chamber 145c is depressurized, the valve body 145fa of the discharge valve 145f moves to the pump chamber 145c side, and the discharge valve 145f closes. When the pressure in the pump chamber 145c is further reduced, the valve body 145da of the suction valve 145d moves toward the pump chamber 145c, and the suction valve 145d is opened. The working fluid flows from the suction side pipe line of the pump to the suction valve 145d and further sucked into the pump chamber 145c. Subsequently, the valve body 145da of the suction valve 145d moves to the filter 145b side, and the suction valve 145d is closed. By repeating such an operation, the working fluid is continuously sucked and discharged.

  The solenoid pump is a pump that operates by movement in the axial direction, and can make the diameter in the depth direction of the hydraulic pressure control unit sufficiently smaller than a conventional pump that uses a rotary motor as a drive source. Further, when the plunger moves in the axial direction, the wear of the seal ring can be reduced and the life of the unit can be improved as compared with a pump using a conventional rotary motor that drives the plunger by eccentric rotation. Furthermore, since a rotary motor is not required, it is possible to prevent the generation of noise caused by the rotation of the motor.

  The solenoid pump 44 is arranged so that the axis of the movable core 148 is in the same direction as the axis of the plunger 146, and can be arranged in a small space. For this reason, by using the solenoid pump 44, for example, it is possible to achieve a reduction in size and weight compared to a pump using a motor as a drive source. In addition, since it is not necessary to arrange a motor in the direction perpendicular to the axis of the pump as in the prior art, the layout freedom of the hydraulic unit 20 can be increased, and the mountability of the brake hydraulic pressure control device 10 on a vehicle can be improved. Can do. Further, by providing a plurality of solenoid pumps 44 and individually controlling the driving of the solenoid pumps 44 so as to cancel out pulsations caused by the discharge pressure from the solenoid pumps 44, the occurrence of pulsations can be greatly reduced. It is also possible.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, the brake hydraulic circuit 1 described in the above embodiment includes the dampers 75a and 75b in the first hydraulic circuit 28 and the second hydraulic circuit 30, respectively. It may be omitted.

  The brake fluid pressure control device 10 described in the above embodiment includes the second pressure sensors 26a and 26b for detecting the internal pressure of the wheel cylinder. However, these second pressure sensors 26a and 26b are provided. May be omitted.

  In the brake fluid pressure control device 10 described in the above embodiment, the piping ports 121a and 121b to which the piping connected to the master cylinder is connected are connected to the first surface 110a and the piping connected to the wheel cylinder is connected. The piping ports 123a to 123d to be formed are formed on the third surface 110c, but the present invention is not limited to such an example. Some piping ports may be formed on other surfaces. For example, the piping ports 121a and 121b to which the piping connected to the master cylinder is connected may be provided on the third surface 110c similarly to the piping ports 123a to 123d.

DESCRIPTION OF SYMBOLS 10 ... Brake fluid pressure control device, 20 ... Fluid pressure unit, 34a, 34b ... Suction control valve, 36a, 36b ... Circuit control valve, 44aa, 44ba, 44ca, 44ab, 44bb, 44cb ..Solenoid type pump, 51aa, 51ba, 51ab, 51bb... Flow path, 54aa, 54ba, 54ab, 54bb... Pressure reducing valve, 58aa, 58ba, 58ab, 58bb... Pressure increasing valve, 70a, 70b Accumulator, 110 ... housing, 110a ... first surface, 110b ... second surface, 110c ... third surface, 121a, 121b ... pipe port, 123a, 123b, 123c , 123d ... Piping port

Claims (9)

A brake fluid pressure control device (10) for controlling the fluid pressure of the brake fluid pressure unit (20),
A housing (110);
A plurality of electromagnetic control valves (34a, 34b, 36a, 36b, 54aa, 54ba, 54ab, 54bb, 58aa, 58ba, 58ab, 58bb) and hydraulic fluid for temporarily increasing, reducing or maintaining the hydraulic pressure Accumulators (70a, 70b) stored in
A plurality of solenoid pumps (44aa, 44ba, 44ca, 44ab, 44bb, 44cb) capable of discharging the hydraulic fluid stored in the accumulators (70a, 70b),
The housing (110)
A first valve mounting portion (131, 133, 135, 137) to which the plurality of electromagnetic control valves (34a, 34b, 36a, 36b, 54aa, 54ba, 54ab, 54bb, 58aa, 58ba, 58ab, 58bb) is mounted. 1 side,
There is a pump mounting portion (143aa, 143ba, 143ca, 143ab, 143bb, 143cb) to which the plurality of solenoid pumps (44aa, 44ba, 44ca, 44ab, 44bb, 44cb) are mounted in opposition to the first surface. A brake fluid pressure control device comprising: a second surface. The valve mounting portions (131, 133, 135, 137) are arranged in two rows on the first surface,
The brake fluid pressure control device according to claim 1. The pump mounting parts (143aa, 143ba, 143ca, 143ab, 143bb, 143cb) are arranged in two rows on the second surface,
The brake fluid pressure control device according to claim 1 or 2. The pump mounting portions (143aa, 143ba, 143ca, 143ab, 143bb, 143cb) arranged in two rows are arranged in the second row with the pump mounting portions (143aa, 143ba, 143ca) arranged in the first row. The pump mounting portions (143ab, 143bb, 143cb) are arranged so as to be shifted from each other in the arrangement direction thereof.
The brake fluid pressure control device according to any one of claims 1 to 3. Accumulator bores (139a, 139b) for assembling the accumulator are provided on the second surface,
The brake fluid pressure control device according to any one of claims 1 to 4. The plurality of solenoid valves are two circuits arranged in a flow path (33a, 33b) connecting a piping port (121a, 121b) to which a pipe connected to a master cylinder is connected and a discharge side of the solenoid type pump. Flow paths (51aa, 51ba) connecting the control valves (36a, 36b) and the circuit control valves (36a, 36b) and the piping ports (123a, 123b, 123c, 123d) to which the piping connected to the wheel cylinders is connected. , 51ab, 51bb) and four pressure increasing valves (58aa, 58ba, 58ab, 58bb), and the two circuit control valves and the four pressure increasing valves are arranged in the same row.
The brake fluid pressure control device according to any one of claims 1 to 5.   The brake fluid pressure control device according to claim 6, wherein the four pressure increasing valves are arranged between the two circuit control valves. The plurality of solenoid valves are arranged in a flow path (31a, 31b) connecting a piping port (121a, 121b) to which a pipe connected to the master cylinder is connected and a suction side of the solenoid type pump (44a, 44b). Two suction control valves (34a, 34b), a suction port of the solenoid type pump (44a, 44b), and a pipe port (123a, 123b, 123c, 123d) to which a pipe connected to the wheel cylinder is connected. Including four pressure reducing valves (54aa, 54ba, 54ab, 54bb) arranged in the connecting flow paths (53aa, 53ba, 53ab, 53bb),
The two suction control valves and the four pressure reducing valves are arranged in the same row;
The brake fluid pressure control device according to any one of claims 1 to 7. The brake fluid pressure control device according to claim 8, wherein the four pressure reducing valves are disposed between the two circuit intake valves.

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