JP4848032B2 - Electronic control unit and vehicle brake hydraulic pressure control device - Google Patents

Description

  The present invention relates to an electronic control unit and a vehicle brake hydraulic pressure control device using the electronic control unit.

  A vehicle brake fluid pressure control device includes a base body on which a brake fluid path is formed, a motor for operating a pump that sucks brake fluid from a reservoir formed inside the base body, and a sensor that detects the behavior of the vehicle body. And an electronic control unit for controlling the operation of a solenoid valve and a motor attached to the base.

An electronic control unit of a vehicle brake fluid pressure control device includes a control board that controls the operation of a solenoid valve and a motor based on the behavior of a vehicle body detected by a sensor, and a housing that houses the control board. Yes.
As a housing of a conventional electronic control unit, a first storage chamber in which an electrical component such as a solenoid valve protruding from a base is stored and a second storage chamber in which a control board is stored are formed in an internal space. There is one provided with a partition portion that partitions the storage chamber and the second storage chamber (see, for example, Patent Document 1).

  Further, as a conventional electronic control unit, there is a unit in which a sensor substrate to which a sensor is attached is accommodated in a second accommodation chamber of a housing, and the sensor substrate is supported by a partition portion. In this configuration, it is not necessary to separately house the sensor and the electronic control unit in the vehicle.

JP 2008-105535 A (paragraph 0022, FIG. 2)

As described above, in the conventional electronic control unit in which the sensor substrate is supported by the partition portion, when low-frequency vibration generated in the outside of the housing or an electrical component is transmitted to the sensor through the partition portion of the housing, The detection accuracy may be reduced.
In addition, when the cover is vibration welded to the housing, if the vibration generated during the welding is transmitted to the sensor via the partition of the housing, the detection accuracy of the sensor may be affected.

  Therefore, in the present invention, the above-described problems can be solved, vibration transmitted to the sensor housed in the housing can be reduced, the detection accuracy of the sensor can be increased, and the molding accuracy of the housing can be increased. It is an object of the present invention to provide an electronic control unit and a vehicle brake hydraulic pressure control device using the electronic control unit.

In order to solve the above-described problems, the present invention provides an electronic control unit, a sensor board on which a sensor is attached, a control board that controls the operation of an electrical component based on a physical quantity detected by the sensor, A housing in which the sensor board and the control board are accommodated, and in the internal space of the housing, the first accommodation chamber in which the electrical component is accommodated, and the sensor board and the control board are accommodated in a hierarchical state. A second storage chamber, and a partition portion that partitions the first storage chamber and the second storage chamber, the sensor substrate and the control substrate are supported by the partition portion, A concave portion opened in the second accommodation chamber is formed, and a sensor accommodating portion that is an accommodating space for the sensor is formed using the concave portion, and a surface of the partition portion on the first accommodating chamber side is Recessed Surface has protruding, at least one of the inner and outer surfaces of the recess is characterized in that ribs are projected. Moreover, it is desirable that the plurality of ribs be provided in the recess in a straight line in parallel.

In this configuration, providing the rib in the recess increases the rigidity of the recess and increases the natural frequency of the recess. This makes it difficult for low-frequency vibrations to be transmitted to the sensor housed in the sensor housing portion, thereby increasing the detection accuracy of the sensor.
Moreover, the thickness of the concave portion is increased by the rib, and when the partition portion is injection-molded, the hot water around the concave portion is improved in the cavity of the mold, so that the molding accuracy of the sensor housing portion can be improved.
Moreover, since the sensor accommodating part is provided by effectively using the space of the first accommodating chamber, the housing can be reduced in size.
Moreover, since the heat generated from the electrical component is blocked by the recess, the influence of the heat on the sensor can be prevented, and the detection accuracy of the sensor can be increased.

  In the electronic control unit described above, the partitioning portion includes a terminal aggregation portion that is electrically connected to the control board at a position opposed to the concave portion, and the rib is provided on one of the terminals. It can comprise so that it may be extended in the direction which goes to the said other said terminal aggregation part from an aggregation part.

  In this configuration, the thickness of the concave portion is increased by the rib, so that the hot water around the concave portion can be improved when casting the partition portion, and the molding accuracy of the sensor housing portion can be increased.

  In the electronic control unit described above, the partitioning portion includes a terminal aggregation portion that is electrically connected to the control board at a position opposed to the concave portion, and the rib is provided on one of the terminals. It can comprise so that it may be extended in the direction which passes between an aggregation part and the said other terminal aggregation part.

  In this configuration, since the thickness of the concave portion is increased by the rib, the hot water around the concave portion can be improved when the partition portion is injection-molded. Furthermore, when the partition part is injection-molded, by providing a sprue at the edge where there is no terminal aggregation part, the cavity of the rib is linearly arranged from this sprue, so that the hot water around the rib is improved. Can do. Therefore, when the partition portion is injection-molded, the molding accuracy of the sensor housing portion can be increased.

In the electronic control unit described above, an angular velocity sensor and an acceleration sensor can be used as the sensor.
With this configuration, it is possible to increase the detection accuracy of an angular velocity sensor or an acceleration sensor that detects the behavior of the vehicle body.

  In the electronic control unit described above, a cover for sealing the opening may be vibration welded to the opening of the housing. In the present invention, by providing ribs in the recesses, the rigidity of the recesses is increased and the natural frequency of the recesses is increased. Therefore, since the vibration generated during vibration welding is difficult to be transmitted to the sensor housed in the sensor housing portion, even if the cover is vibrated and welded in a state where the sensor is housed in the sensor housing portion, the detection accuracy of the sensor Can be increased.

A vehicle brake fluid pressure control device using the electronic control unit described above, comprising a base body on which a brake fluid passage is formed, and the electronic control unit, wherein the control board is a vehicle body detected by the sensor. The brake fluid pressure in the brake fluid passage is varied by controlling the operation of the electric component based on the behavior of the above.
In this configuration, since the detection accuracy of the angular velocity sensor and the acceleration sensor that detect the behavior of the vehicle body can be increased, the accuracy of the brake control can be increased.

In the electronic control unit of the present invention, since the rigidity of the concave portion is increased and the natural frequency of the concave portion is increased, low-frequency vibration is hardly transmitted to the sensor accommodated in the sensor accommodating portion, and the detection accuracy of the sensor is increased. Can do.
In addition, when the partition portion is injection-molded, the hot water around the recess is improved in the cavity of the mold, so that the molding accuracy of the sensor housing portion can be increased.
Moreover, since the sensor accommodating part is provided by effectively using the space of the first accommodating chamber, the housing can be reduced in size.
Moreover, since the heat generated from the electrical component is blocked by the recess, the detection accuracy of the sensor can be increased.
Further, in the vehicle brake hydraulic pressure control device using the electronic control unit described above, the detection accuracy of the angular velocity sensor and the acceleration sensor for detecting the behavior of the vehicle body can be increased, so that the accuracy of the brake control can be increased.

It is the disassembled perspective view which showed the brake fluid pressure control apparatus for vehicles provided with the electronic control unit of this embodiment. It is a sectional side view showing the brake fluid pressure control device for vehicles provided with the electronic control unit of this embodiment. It is the figure which showed the state before attaching a sensor board | substrate and a control board to the housing of this embodiment, and is the perspective view which looked at the housing from the front side. It is the perspective view which reversed the housing of this embodiment to the up-down direction, and was seen from the back side. It is the figure which reversed the housing of this embodiment to the up-down direction, and was seen from the back side. It is the sectional side view which showed the attachment site | part of the partition part and sensor board | substrate of this embodiment. It is the figure which showed the electrically-conductive member embed | buried under the partition part of this embodiment. It is the perspective view which showed the sensor board | substrate of this embodiment. It is the figure which showed the state which attached the sensor board | substrate to the housing of this embodiment, and is the perspective view which looked at the housing from the front side. It is the figure which showed the assembly method of the electronic control unit of this embodiment, (a) is a sectional side view which showed the aspect which resistance-welded each connection terminal, (b) is the aspect which attaches a sensor board | substrate to a partition part. FIG. It is the figure which showed the movable area | region of the tool for welding in the electronic control unit of this embodiment. It is the figure which showed the state which attached the control board to the housing of this embodiment, and is the perspective view which looked at the housing from the front side. It is the figure which showed the electronic control unit of other embodiment, and is the figure which looked at the housing from the back side.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In this embodiment, an electronic control unit applied to a vehicle brake hydraulic pressure control device will be described.

As shown in FIG. 1, the vehicle brake hydraulic pressure control device U includes an electric part such as a solenoid valve V and a pressure sensor S, an electric part such as a motor 200, a reciprocating pump P and the like. An electronic control unit 10 that mainly detects the behavior and controls the opening and closing of the electromagnetic valve V and the operation of the motor 200 is mainly provided.
A brake fluid passage is formed in the base body 100, and the electronic control unit 10 operates the electromagnetic valve V and the motor 200 based on the behavior of the vehicle body so that the brake fluid pressure in the brake fluid passage varies. It is configured.

As shown in FIG. 1, the base body 100 is a metal part formed in a substantially rectangular parallelepiped, and a brake fluid passage is formed therein.
Among the surfaces of the base body 100, a plurality of bottomed mounting holes 151... For mounting electrical components such as the solenoid valve V and the pressure sensor S are formed on the front surface 101.
On the upper surface 103 of the base body 100, a plurality of outlet ports 152, etc., to which pipes leading to wheel brakes (not shown) are connected are formed.
On the lower surface of the base body 100, a reservoir hole 153 and the like for assembling a reservoir component R constituting the reservoir are formed.
A side surface 105 of the base body 100 is formed with a pump hole 155 in which the reciprocating pump P is mounted.
The holes provided in the base body 100 communicate with each other directly or through a brake fluid passage (not shown) formed in the base body 100.

The motor 200 is an electric component that serves as a power source for the reciprocating pump P, and is integrally fixed to the back surface 102 of the base body 100 as shown in FIG.
The output shaft 210 of the motor 200 is inserted into a motor mounting hole 154 formed in the back surface 102 of the base body 100. A motor bus bar 220 for supplying electric power to a rotor (not shown) is connected above the output shaft 210.

  An electronic control unit 10 shown in FIG. 1 includes a housing 40 that houses an electrical component protruding from the front surface 101 of the base body 100, the sensor board 30, and the control board 20, and a cover 50 that closes an opening of the housing 40. I have.

As shown in FIG. 2, the housing 40 is integrally fixed to the front surface 101 of the base body 100 while covering electrical components such as the electromagnetic valve V and the pressure sensor S protruding from the front surface 101 of the base body 100. It is a box made of synthetic resin.
The housing 40 has an opening on the front side (the right side in FIG. 2) and the back side (the left side in FIG. 2). A first storage chamber 41 is formed on the back side of the internal space of the housing 40 to store electrical components such as the solenoid valve V, the electromagnetic coil V1, and the pressure sensor S, and the sensor board 30 and the control board are provided on the front side of the internal space. A second storage chamber 42 in which 20 is stored is formed.

  The housing 40 includes a first peripheral wall portion 41a that forms the first storage chamber 41, a connector connection portion 43 (see FIG. 3) disposed on the side of the first peripheral wall portion 41a, and a second storage chamber 42. And a partition 44 that partitions the first storage chamber 41 and the second storage chamber 42 from each other.

  The first peripheral wall portion 41 a is a portion that surrounds the electrical component, and includes a flange 41 b that comes into contact with the outer peripheral edge of the front surface 101 of the base body 100. A mounting hole 41c is formed at an appropriate position of the flange 41b (see FIG. 4).

The 2nd surrounding wall part 42a is a site | part which surrounds the sensor board | substrate 30 and the control board 20, and is arrange | positioned at the front side of the 1st surrounding wall part 41a and the connector connection part 43 (refer FIG. 3).
As shown in FIG. 3, the outer peripheral shape of the 2nd surrounding wall part 42a is a substantially rectangular shape, and the site | part which swelled outside is formed in two sides (upper and lower sides of FIG. 3) of a longitudinal direction. Terminal concentrating portions 45 and 45 are respectively formed inside the swollen portion of the second peripheral wall portion 42a (see FIG. 7).
In the terminal aggregation part 45, a plurality of terminals 45a, which are metal parts, are exposed on the surface on the second storage chamber 42 side. As shown in FIG. 2, the conductive member 45b extending from the terminal 45a is embedded in the partition 44, and is electrically connected to the terminal of the electromagnetic coil V1 on the front side (second storage chamber 42 side) of the partition 44. In addition, the back side of the partition 44 (on the first storage chamber 41 side) is electrically connected to the terminals of the pressure sensor S and the motor bus bar 220 of the motor 200, respectively.

  The connector connecting portion 43 shown in FIG. 3 is a portion to which a connector provided at an end portion of an external wiring cable (not shown) is connected. The connector connection portion 43 includes a plurality of connection terminals 43a (see FIG. 4) led out from the second storage chamber 42 to the outer surface (surface exposed to the outside) through the bottom wall of the connector connection portion 43. , And side walls 43b surrounding the connection terminals 43a.

As shown in FIG. 2, the partition portion 44 is a plate-like portion that faces the front surface 101 of the base body 100 with a space therebetween. As shown in FIG. 3, the partition portion 44 is formed in a substantially rectangular shape, and substrate holding portions 44c... Project from the four corners of the front side surface 44a (surface on the second storage chamber 42 side). Has been.
The substrate holding part 44c is a part that supports a control board 20 (see FIG. 12), which will be described later, and the protruding end face of each substrate holding part 44c... Abuts on the back side surface of the control board 20. A female screw hole is formed in the protruding end surface of the substrate holding portion 44c.
Further, as shown in FIG. 2, a terminal mounting portion 44d through which the terminal T connected to the motor bus bar 220 passes is formed on the back surface 44b (the surface on the first storage chamber 41 side) of the partition portion 44. Yes.

In the vicinity of the center of the surface 44a on the front side of the partition portion 44, a rectangular recess 71 is formed in a position adjacent to the terminal mounting portion 44d in a plan view opened to the second storage chamber 42.
The recess 71 protrudes into the first storage chamber 41, and the internal space of the recess 71 is a sensor storage portion 70 in which an angular velocity sensor 33 and an acceleration sensor 34 attached to a sensor substrate 30 described later are stored. That is, the sensor accommodating portion 70 is formed by using the concave portion 71 provided in the partition portion 44 that partitions the first accommodating chamber 41 and the second accommodating chamber 42.

  Also, as shown in FIG. 3, two reference pins 46 and 46 are provided on the front surface 44a of the partition 44 so as to sandwich the recess 71 in the longitudinal direction, and the recess 71 is disposed in the longitudinal direction. Two mounting screw holes 44e are formed so as to be sandwiched.

  As shown in FIG. 4, a plurality of support pieces 44 f constituting the steady rests of electrical components such as the electromagnetic coil V <b> 1 and the pressure sensor S (see FIG. 2) are provided on the rear surface 44 b of the partition 44. . The support piece 44f corresponds to an integral electrical component in two or four pairs.

Further, a first rib 44g having a rectangular cross section is provided on the rear surface 44b of the partition 44. The first rib 44g extends over the entire area of the rear surface 44b of the partition portion 44. As shown in FIG. 5, the rear surface 44b of the partition portion 44 is divided into a plurality of regions by the first rib 44g. It is divided into A .... In FIG. 5, the first rib 44g is hatched for easy understanding of the arrangement of the first rib 44g.
In the present embodiment, the electromagnetic coil V1 disposed on the surface 44b on the back side of the partition portion 44 is supported by the partition portion 44 in the region A partitioned by the first rib 44g. That is, the first rib 44g divides the surface 44b on the back side of the partitioning portion 44 into a plurality of regions A ... so as to surround an attachment location of an electric component such as the electromagnetic coil V1, and the first rib 44g The arrangement and height are set so as not to interfere with the electrical components.

In addition, a second rib 44 h having a rectangular cross section is projected from an outer surface 71 b (surface on the first storage chamber 41 side) of the recess 71 protruding from the surface on the first storage chamber 41 side of the partition portion 44. In FIG. 5, the second rib 44h is hatched in the same manner as the first rib 44g.
Terminal partitioning portions 45, 45 are arranged in the partitioning portion 44 so as to face each other with the recess 71 interposed therebetween, and the second rib 44h extends from one terminal aggregation portion 45 (see FIG. 2) to the other terminal aggregation. It extends linearly along the direction toward the portion 45 (see FIG. 2). In the present embodiment, a plurality of second ribs 44h are arranged in parallel.
As described above, the second ribs 44h... Are extended in the vertical direction of FIG. 5 and the terminal aggregation portions 45, 45 (see FIG. 2) are provided at both ends in the extending direction of the second ribs 44h. ) Is arranged. That is, each 2nd rib 44h ... is arrange | positioned in parallel with respect to the one side (one side of the left side of FIG. 5) of the partition part 44 in which the terminal aggregation part 45 and the connector connection part 43 are not arrange | positioned.

  As shown in FIG. 6, the plurality of second connection terminals 82 provided at the end of the conductive member 45 b embedded in the partition 44 protrude toward the second storage chamber 42 (see FIG. 3). And the 1st connection terminal 81 extended from electric components, such as the electromagnetic coil V1 attached to the surface 44b of the back side of the partition part 44, passes through the opening part formed in the partition part 44, and the front side of the partition part 44 It overlaps with the second connection terminal 82 on the surface 44a, and the first connection terminal 81 and the second connection terminal 82 are electrically connected by resistance welding.

  As shown in FIG. 7, the partition portion 44 includes a first region B in which the respective conductive members 45 b... Reaching one terminal aggregation portion 45 and the respective conductive members 45 b reaching the other terminal aggregation portion 45. Are provided, and a third region D interposed between the first region B and the second region C is provided, and a recess 71 is formed in the third region D. ing. That is, each of the conductive members 45b is disposed on the edge side (upper and lower two sides in FIG. 7) of the partition 44 with respect to the recess 71. In FIG. 7, each conductive member 45b is hatched for easy understanding. As described above, by arranging the respective conductive members 45b... So as not to straddle the recess 71, the sensor accommodating portion 70 can be provided near the center of the partition portion 44.

  As shown in FIG. 2, the cover 50 is a lid made of synthetic resin that seals the opening on the opposite side of the base body 100 side of the housing 40 (see FIG. 1), and the end face 42b on the front side of the housing 40 by vibration welding. It is fixed to. The cover 50 can also be fixed to the front end face 42b of the housing 40 by means such as adhesion.

  As shown in FIG. 8, the sensor substrate 30 includes a rectangular substrate body 31 on which an electronic circuit (conductive member) is printed, electronic components such as an angular velocity sensor 33 and an acceleration sensor 34 mounted on the substrate body 31, and The vehicle body behavior (predetermined physical quantity) is detected by the angular velocity sensor 33 and the acceleration sensor 34.

  As shown in FIG. 9, the sensor substrate 30 is arranged with the surface on which the angular velocity sensor 33 and the acceleration sensor 34 are placed facing the partition 44, and the substrate body 31 is a surface 44 a on the front side of the partition 44. Placed on. When the sensor substrate 30 is attached to the partition portion 44, as shown in FIG. 2, the angular velocity sensor 33 and the acceleration sensor 34 are accommodated in the sensor accommodation portion 70 from the second accommodation chamber 42 side.

As shown in FIG. 8, two insertion holes 32... That communicate with mounting screw holes 44 e formed in the partition 44 (see FIG. 3) are provided at both ends in the longitudinal direction of the sensor substrate 30. It is formed one by one. Then, as shown in FIG. 9, the fixing bolt 36 inserted through the insertion hole 32 from the front side of the sensor substrate 30 is screwed into the mounting screw hole 44 e (see FIG. 3), whereby the sensor substrate 30 is separated from the partition portion 44. Are attached to the front surface 44a.
In addition, in order to improve the stability of the sensor substrate 30, it is desirable that the substrate body 31 is placed on the entire periphery of the edge portion of the recess 71 formed in the partition portion 44.

As shown in FIG. 6, a plurality of welding portions of the first connection terminal 81 and the second connection terminal 82 are arranged around the substrate body 31 positioned on the front surface 44 a of the partition portion 44 ( (See FIG. 9).
The welding parts of the connection terminals 81 and 82 are close to the outer peripheral edge of the substrate body 31. In the present embodiment, the distance between the outer peripheral edge of the substrate body 31 and the welded portion of each connection terminal 81, 82 is based on the width x of the tip of the welding tool 90 for resistance welding the connection terminals 81, 82. Is set too small.
The welding tool 90 is configured to sandwich the connection terminals 81 and 82 between two electrode portions, and the width x of the tip portion of the welding tool 90 is the lateral width of one electrode portion. is there. That is, the distance between the outer peripheral edge of the substrate body 31 and the welded portion of each of the connection terminals 81 and 82 is set such that one electrode portion of the welding tool 90 cannot enter.

In the method of assembling the electronic control unit 10 of the present embodiment, the sensor substrate 30 is partitioned after resistance welding of the first connection terminal 81 of the electrical component and the second connection terminal 82 provided in the partition portion 44 of the housing 40. It is attached on the front surface 44 a of the portion 44.
Specifically, first, as shown in FIG. 10A, a first connection terminal 81 of an electrical component such as an electromagnetic coil V1 and a second connection terminal 82 projecting from the partition portion 44 are connected to the second. The connection terminals 81 and 82 are resistance-welded by being sandwiched between the electrode portions of the welding tool 90 on the accommodation chamber 42 side and energizing the connection terminals 81 and 82 from the welding tool 90.
Thereafter, as shown in FIG. 10B, the substrate body 31 of the sensor substrate 30 is attached on the front surface 44 a of the partition portion 44. At this time, as shown in FIG. 9, by inserting the reference pins 46, 46 projecting from the partition 44 into the positioning holes 35, 35 (see FIG. 8) of the substrate body 31, the angular velocity sensor 33. The sensor substrate 30 can be positioned on the surface 44a on the front side of the partition portion 44 so that the detection axis coincides with the vertical direction of the vehicle and the detection axis of the acceleration sensor 34 coincides with the longitudinal direction and the lateral direction of the vehicle. .

  In FIG. 11, the hatched region 91 is a welding tool 90 (FIG. 10 (a) when resistance welding is performed on a part of the sensor substrate 30 attached to the partition portion 44 and the connection terminals 81 and 82. ))), The region where the tip of the movable region overlaps is shown. In this way, a part of the sensor substrate 30 (substrate body 31) attached to the partitioning portion 44 is disposed in each movable region.

As shown in FIG. 12, the control board 20 is obtained by attaching an electronic component 26 such as a semiconductor chip to a rectangular board body 21 on which an electronic circuit (conductive member) is printed. The control board 20 is housed in the second housing chamber 42 with the surface on which the electronic component 26 is attached facing up.
The control board 20 controls the opening and closing of the electromagnetic valve V and the operation of the motor 200 based on information obtained from various sensors such as the sensor board 30 and the pressure sensor S shown in FIG. 2 and a program stored in advance. Is configured to do.

As shown in FIG. 12, insertion holes 22 are formed in the control board 20 in the vicinity of the four corners of the board body 21. The substrate body 21 is placed on the protruding end surface of each substrate holding portion 44c... Of the partition portion 44 (see FIG. 3), and the insertion hole 22 communicates with the screw hole of the substrate holding portion 44c (see FIG. 3). is doing. And the control board 20 is screwed into the screw hole of the board | substrate holding | maintenance part 44c (refer FIG. 3) by screwing the fixing volt | bolt 23 penetrated by the insertion hole 22 from the front side of the control board 20, and the control board 20 is the 2nd accommodation chamber of the partition part 44. It is attached to the 42 side.
As a result, as shown in FIG. 2, the sensor substrate 30 and the control substrate 20 are accommodated in a hierarchical state in the second accommodation chamber 42 while being supported by the partitioning portion 44. Since the board body 21 of the control board 20 is larger than the board body 31 of the sensor board 30, the control board 20 is attached to the partition portion 44 while covering the sensor board 30.

  In the control board 20 attached to the second housing chamber 42 side of the partition 44 (see FIG. 3), the electronic circuit of the control board 20 and the terminal 45a of the terminal aggregation part 45 are electrically connected by the bonding wire 45c. Has been. Thereby, the various electronic components attached to the control board 20 and the electrical components attached to the base body 100 are electrically connected.

  In addition, a conductive member (not shown) embedded in the partition portion 44 is electrically connected to the sensor substrate 30 attached to the partition portion 44 shown in FIG. By being electrically connected to the terminal 45a, the electronic circuit of the sensor board 30 and the electronic circuit of the control board 20 are electrically connected. Accordingly, vehicle behavior information detected by the angular velocity sensor 33 and the acceleration sensor 34 attached to the sensor board 30 can be output to the control board 20.

The electronic control unit 10 of this embodiment as described above has the following operational effects.
In the electronic control unit 10 of the present embodiment, as shown in FIG. 4, the ribs 44 g and 44 h are provided on the rear surface 44 b of the partition 44 and the outer surface 71 b of the recess 71, so that the rigidity of the partition 44 and the recess 71 is increased. The natural frequency of the partition part 44 and the recessed part 71 becomes high. This makes it difficult for low-frequency vibrations to be transmitted to the angular velocity sensor 33 and the acceleration sensor 34 that are supported by the partition portion 44 and accommodated in the sensor accommodating portion 70, thereby increasing the detection accuracy of the angular velocity sensor 33 and the acceleration sensor 34. Can do.
Further, even when the cover 50 is vibrated and welded to the end surface 42b of the housing 40 shown in FIG. 2 in a state where the angular velocity sensor 33 and the acceleration sensor 34 are accommodated in the sensor accommodating portion 70, the sensor accommodating portion 70 accommodates them. Since it is difficult for low-frequency vibrations to be transmitted to the angular velocity sensor 33 and the acceleration sensor 34, the detection accuracy of the angular velocity sensor 33 and the acceleration sensor 34 can be increased.

  Further, in the electronic control unit 10 of the present embodiment, as shown in FIG. 4, a plurality of second ribs 44 h... Project from the outer surface 71 b of the recess 71 formed in the partition 44. The thickness of 71 is large. Therefore, when the partition portion 44 is injection-molded, the hot water around the recess 71 is improved in the cavity of the mold, so that the molding accuracy of the sensor housing portion 70 can be increased.

  Further, in the electronic control unit 10 of the present embodiment, as shown in FIG. 5, the partition portion 44 has a first rib 44 g provided on the back surface 44 b of the partition portion 44 so as to surround an attachment location of the electrical component. The rear side surface 44b is partitioned into a plurality of regions A, and the arrangement and height are set so as not to interfere with the electrical components.

  Further, in the electronic control unit 10 of the present embodiment, as shown in FIG. 2, the sensor accommodating portion 70 is formed by using the concave portion 71 formed in the partition portion 44, and the space of the first accommodating chamber 41 is formed. Since the sensor housing part 70 is provided effectively, the housing 40 can be reduced in size.

  Further, in the electronic control unit 10 of the present embodiment, since the heat generated from the electrical components is blocked by the recess 71, the influence of the heat on the angular velocity sensor 33 and the acceleration sensor 34 can be prevented. Detection accuracy can be increased.

  As shown in FIG. 1, in the vehicle brake hydraulic pressure control device U using the electronic control unit 10 of the present embodiment, the angular velocity sensor 33 and the acceleration sensor 34 (see FIG. 2) that detect the behavior of the vehicle body are detected. Since the accuracy can be increased, the accuracy of the brake control can be increased.

Moreover, in the electronic control unit 10 of this embodiment, as shown in FIG. 6, the board | substrate body 31 of the sensor board | substrate 30 attached on the surface 44a on the front side of the partition part 44, and the welding site | part of each connection terminal 81,82 Is set smaller than the width x of the tip of the welding tool 90 for resistance welding the connection terminals 81 and 82. Therefore, since the space | interval of the sensor board 30 and each connection terminal 81 and 82 arrange | positioned around the sensor board 30 can be made small, the housing 40 can be reduced in size.
In the method of assembling the electronic control unit 10 of this embodiment, as shown in FIGS. 10A and 10B, after the connection terminals 81 and 82 are resistance welded, the substrate body 31 of the sensor substrate 30 is attached. The partition 44 is attached to the front surface 44a.

  Further, in the electronic control unit 10 of the present embodiment, as shown in FIG. 11, a part of the sensor substrate 30 attached to the partition portion 44 is within the movable region of the welding tool 90 (see FIG. 10A). Is arranged. Thus, the sensor board 30 can be enlarged by effectively using the space in the housing 40.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the spirit of the present invention.
For example, in the embodiment, as shown in FIG. 4, the first rib 44 g is provided on the rear surface 44 b of the partition portion 44, but may be provided on the front surface 44 a of the partition portion 44, It may be provided on both the front surface 44a and the back surface 44b. Similarly, in the embodiment, the second rib 44 h is provided on the outer surface 71 b of the recess 71, but the second rib 44 h may be provided on the inner surface of the recess 71 and both surfaces of the recess 71.

Further, as shown in FIG. 13, a plurality of second ribs 44i... Provided on the outer surface 71b of the concave portion 71 of the partition portion 44 are connected to one terminal aggregation portion 45 (see FIG. 2) and the other terminal aggregation. You may extend in the direction which passes between the parts 45 (refer FIG. 2). That is, the terminal aggregation parts 45 and 45 (refer FIG. 3) are arrange | positioned at two sides (upper and lower two sides of FIG. 13) arrange | positioned at the both sides of the extension direction of each 2nd rib 44i ..., and each 2nd rib 44i. .. May be arranged perpendicular to one side (one side on the left side in FIG. 13) where the terminal aggregation portions 45, 45 (see FIG. 3) and the connector connecting portion 43 are not arranged in the partition portion 44.
In this configuration, when the partition portion 44 is injection-molded, a gate is provided on the left side in FIG. 13 where the terminal aggregation portions 45 and 45 and the connector connection portion 43 are not present, and the right side in FIG. Since the cavities of the second ribs 44i are linearly arranged, the hot water around the second ribs 44i can be improved when the partition portion 44 is injection molded, The molding accuracy of the sensor housing part 70 can be increased.

DESCRIPTION OF SYMBOLS 10 Electronic control unit 20 Control board 30 Sensor board 31 Substrate main body 33 Angular velocity sensor 34 Acceleration sensor 40 Housing 41 First accommodation chamber 42 Second accommodation chamber 43 Connector connection part 44 Partition part 44a Front side surface of partition part 44b Back side of partition part Surface 44f support piece 44g first rib 44h second rib 45 terminal aggregation portion 45b conductive member 46 reference pin 50 cover 70 sensor housing portion 71 recess 71b outer surface of the recess 81 first connection terminal 82 second connection terminal 90 welding tool 100 Base 200 Motor 210 Output shaft U Brake fluid pressure controller for vehicle V Solenoid valve V1 Electromagnetic coil

Claims (7)

A sensor board on which the sensor is mounted;
A control board for controlling the operation of the electrical component based on the physical quantity detected by the sensor;
A housing for housing the sensor board and the control board,
In the internal space of the housing, a first storage chamber in which the electrical component is stored, a second storage chamber in which the sensor substrate and the control board are stored in a hierarchical state, the first storage chamber, and the second storage chamber And a partition that partitions the storage chamber,
The sensor board and the control board are supported by the partition part,
The partition portion is formed with a recess opening in the second storage chamber, and using the recess, a sensor storage portion that is a storage space for the sensor is formed ,
The outer surface of the recess protrudes from the surface of the partition portion on the first storage chamber side ,
An electronic control unit, wherein a rib projects from at least one of an inner surface and an outer surface of the recess.   The electronic control unit according to claim 1, wherein a plurality of the ribs are provided in parallel in the concave portion in a straight line shape. In the partition portion, a terminal aggregation portion that is electrically connected to the control board is disposed at a position opposed to the concave portion,
3. The electronic control unit according to claim 2, wherein the rib is extended in a direction passing between one terminal aggregation portion and the other terminal aggregation portion. In the partition portion, a terminal aggregation portion that is electrically connected to the control board is disposed at a position opposed to the concave portion,
The electronic control unit according to claim 2, wherein the rib is extended in a direction from one terminal aggregation portion to the other terminal aggregation portion.   The electronic control unit according to any one of claims 1 to 4, wherein the sensors are an angular velocity sensor and an acceleration sensor.   The electronic control unit according to claim 5, wherein a cover for sealing the opening is vibration welded to the opening of the housing. A vehicle brake fluid pressure control device comprising: a base body on which a brake fluid path is formed; and the electronic control unit according to claim 5 or claim 6,
The control board varies the brake fluid pressure in the brake fluid path by controlling the operation of the electric component based on the behavior of the vehicle body detected by the sensor. Pressure control device.

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