JP2007099057A - Brake device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the installation space, improve assembling workability, and prevent occurrence of energization failure in mounting a solenoid valve, a hydraulic sensor, and an electronic control unit to a vehicle by compactly integrating them. <P>SOLUTION: A cover 77 forming a storage chamber 78 between the storage chamber 78 and the projecting part 17a is mounted to the projecting part 17a integrally provided with a casing 17 of a hydraulic booster 13, the solenoid valve 54 and the hydraulic sensor 60 are mounted to the projecting part 17a by projecting the part of them to the storage chamber, and the electronic control unit is mounted to the cover 77 or the projecting part 17a in the storage chamber 78. A connector chamber communicating to the storage chamber is formed between a connector housing of an external part conducting wire side connector and a connector housing of a cover side connector, and an air bent capable of ventilating between the storage chamber 78 and the external part is provided with the cover 77 or the projecting part 17a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hydraulic pressure booster that adjusts an output hydraulic pressure of a hydraulic pressure generation source according to a brake operation of a brake operating member, a master cylinder that operates with an output hydraulic pressure of the hydraulic pressure booster, automatic brake control, and regenerative braking. The present invention relates to a vehicular brake device including an electromagnetic valve and a hydraulic pressure sensor for executing at least one of controls, and an electronic control unit that controls the operation of the electromagnetic valve based on information including at least a detection value of the hydraulic pressure sensor.

Such a vehicle brake device is already known from, for example, Patent Document 1 and the like.
JP 2000-219125 A

  In the vehicle brake device disclosed in Patent Document 1, an electromagnetic valve and a hydraulic pressure sensor for performing automatic brake control are arranged separately from the master cylinder and the hydraulic pressure booster. However, considering the problem of installation space at the time of assembling to the vehicle and the assembling workability, it is desirable to make the whole compact.

  At this time, if the electronic control unit is compactly assembled together with the electromagnetic valve and the hydraulic pressure sensor, the electronic control unit and the connection portion of the electromagnetic valve and the hydraulic pressure sensor to the electronic control unit are covered with a cover to obtain waterproofness. In such a structure, the external conductor side connector connected to the external conductor is connected to the cover side connector provided in the cover. At this time, if the connector chamber generated between the two connectors is kept in a sealed state in order to prevent an energization failure due to the ingress of water from the outside, the internal pressure of the connector chamber changes due to a temperature change accompanying the energization, and the connector housing of both connectors May be deformed, and the seal between the connector housings may be insufficient.

  The external conductor is formed by covering the conductor with an insulating tube. If the end of the external conductor opposite to the external conductor side connector is submerged or water adheres to the end, the connector As the internal pressure of the chamber changes, external water may be sucked into the connector chamber due to capillary action in the gap between the insulating tube and the conductor.

  The present invention has been made in view of such circumstances, and the electronic valve, the hydraulic pressure sensor, and the electronic control unit are compactly assembled to reduce the installation space when assembled to the vehicle. It is an object of the present invention to provide a vehicle brake device that improves workability and prevents energization failure.

  In order to achieve the above-mentioned object, the invention described in claim 1 includes a hydraulic booster that adjusts the output hydraulic pressure of the hydraulic pressure generation source in accordance with the brake operation of the brake operating member, and the output hydraulic pressure of the hydraulic booster. The operation of the solenoid valve is controlled based on information including at least a detected value of the master cylinder, an electromagnetic valve and a hydraulic pressure sensor for executing at least one of automatic brake control and regenerative brake control, and a detected value of the hydraulic pressure sensor. In a vehicle brake device including an electronic control unit, a synthesis is provided in which a storage chamber is formed between an overhang portion provided integrally with the casing of the hydraulic booster and projecting to the side of the hydraulic booster. A resin cover is attached via a seal member, and the solenoid valve and the hydraulic pressure sensor are attached to the overhanging portion with a part protruding into the storage chamber. The electronic control unit is attached to the cover or the overhanging portion in the storage chamber, and is provided on the cover so as to connect the connector housing of the external conductor side connector and the external conductor side connector in a liquid-tight and detachable manner. A connector chamber that communicates with the storage chamber is formed between the cover housing and the connector housing of the cover-side connector, and a vent hole that allows ventilation between the storage chamber and the outside is provided in the cover or the overhanging portion. And

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the vent hole is provided in the overhanging portion.

  According to a third aspect of the invention, in addition to the configuration of the second aspect of the invention, the vent hole is provided in the projecting portion so as to open an outer end toward a dashboard to which the casing is attached. Features.

  Furthermore, the invention described in claim 4 is characterized in that, in addition to the configuration of the invention described in claim 3, the vent hole is closed by a closing member formed of a breathable waterproof material.

  In addition, the brake pedal 11 of an Example respond | corresponds to the brake operation member of this invention.

  According to the first aspect of the present invention, the electromagnetic valve and the hydraulic pressure sensor are attached to the overhang portion provided integrally with the casing of the hydraulic pressure booster, and the electronic control unit has the protruding portions of the electromagnetic valve and the hydraulic pressure sensor. Covered and attached to the overhanging part or attached to the overhanging part, so that the solenoid valve, hydraulic pressure sensor and electronic control unit can be combined together with the hydraulic booster in a compact manner, reducing the installation space when assembling to the vehicle. As a result, the assembly workability can be improved. In addition, since the projecting portions of the electromagnetic valve and the hydraulic pressure sensor and the electronic control unit are covered with the cover, waterproofness when mounted on the vehicle can be obtained. In addition, the connector chamber formed between the connector housing of the cover side connector and the connector housing of the external conductor side connector provided in the cover communicates with the storage chamber in the cover, and the storage chamber can be vented to the outside by the vent hole. Therefore, the change in the internal pressure of the connector chamber is suppressed as much as possible. Therefore, a seal failure due to the deformation of the connector housing occurs, or the capillary phenomenon from the insulation tube of the external conductor and the gap between the conductors. It is possible to prevent the suction of water due to the above.

  According to the second aspect of the present invention, the formation of the air holes is facilitated.

  According to the third aspect of the present invention, it is possible to prevent water, dust and the like from entering the vent hole from the outside as much as possible.

  Furthermore, according to the fourth aspect of the present invention, it is possible to reliably prevent water from entering the storage chamber.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

  1 to 6 show an embodiment of the present invention, FIG. 1 is a brake hydraulic system diagram showing the overall configuration of a vehicle brake device, and FIG. 2 is a master cylinder and a hydraulic booster attached to a dashboard. 3 is a side view taken along line 3 in FIG. 3, FIG. 3 is a view taken in the direction of the arrow 3 in FIG. 2, FIG. 4 is an enlarged view of the main part in FIG. It is an arrow part enlarged view.

  First, in FIG. 1, the brake device of a four-wheel vehicle adjusts the hydraulic pressure of the hydraulic pressure generation source 12 according to the brake operation force input from the master cylinder M which is a tandem type and the brake pedal 11 which is a brake operation member. A hydraulic booster 13 that pressurizes and acts on the master cylinder M, and a stroke simulator 14 interposed between the brake pedal 11 and the hydraulic booster 13 are provided.

  The cylinder body 16 of the master cylinder M is formed in a bottomed cylindrical shape with the front end closed, and the rear end of the cylinder body 16 is coupled to the front end of the casing 17 included in the hydraulic booster 13. The rear end of the cylinder body 16 is liquid-tightly fitted to the front portion of the casing 17, and the separator 18, which is liquid-tightly fitted to the casing 17, is formed between the rear end of the cylinder body 16 and the casing 17. The sleeve 19 and the second sleeve 20 are sandwiched while the first sleeve 19 is sandwiched between the separator 18 and the second sleeve 20.

  The cylinder body 16 is formed with a first cylinder hole 21 whose front end is closed, and the master cylinder M has a rear master piston 23 that has a back surface facing the boost hydraulic chamber 22 and is spring-biased rearward. The front master piston 24 disposed in front of the rear master piston 23 while being slidably fitted in the first cylinder hole 21 and being spring-biased rearward is slidable in the first cylinder hole 21. A rear output hydraulic pressure chamber 25 is formed between the rear master piston 23 and the front master piston 24, and the front output hydraulic pressure chamber is formed between the front end closing portion of the cylinder body 16 and the front master piston 24. 26 is formed.

  The cylinder body 16 is provided with a rear output port 27 that communicates with the rear output hydraulic chamber 25 and a front output port 28 that communicates with the front output hydraulic chamber 26. Further, a rear return spring 29 for urging the rear master piston 23 rearward is provided between the rear master piston 23 and the front master piston 24 in the rear output hydraulic chamber 25, and a cylinder is provided in the front output hydraulic chamber 26. Between the front closed end of the body 16 and the front master piston 24, a front return spring 30 that biases the front master piston 24 rearward is contracted.

  The master cylinder M is provided with a reservoir 31, and the reservoir 31 is formed by dividing the first, second and third liquid reservoir chambers 31a, 31b and 31c from each other. The cylindrical rear connection tube portion 32 that communicates with the reservoir chamber 31b and the cylindrical front connection tube portion 33 that communicates with the first liquid reservoir chamber 31a protrude upward at positions spaced in the axial direction of the cylinder body 16. And are provided integrally.

  The rear master piston 23 is provided with a center valve 34 that allows the rear output hydraulic pressure chamber 25 to communicate with the second liquid reservoir chamber 31b when the rear master piston 23 returns to the retreat limit position. Further, the front master piston 24 is provided with a center valve 35 for connecting the front output hydraulic pressure chamber 26 to the first liquid reservoir chamber 31a when the front master piston 24 returns to the retreat limit position.

  The rear output port 27 of the master cylinder M is connected to the right front wheel brake B1 and the left rear wheel brake B2 via a hydraulic pressure modulator 36, and the front output port 28 is connected to the hydraulic pressure modulator 36. To the left front wheel brake B3 and the right rear wheel brake B4. Thus, the hydraulic pressure modulator 36 can freely control the brake hydraulic pressure output from the rear and front output ports 27 and 28 to execute anti-lock brake control at the time of brake operation, and in a non-brake operation state. This is a well-known one that can execute automatic brake control such as traction control.

  The hydraulic booster 13 allows the rear master piston 23 of the master cylinder M to be pressed directly from the rear so that the front end faces the boost hydraulic chamber 22 and is slidably fitted to the separator 18 and the second sleeve 20. The cylindrical backup piston 38, the pressure regulating valve means 39 built in the backup piston 38, and the reaction force and brake based on the hydraulic pressure of the boost hydraulic pressure generating chamber 40 connected to the boost hydraulic pressure chamber 22 A control piston 41 for regulating the pressure regulating valve means 39 so that the brake operation input inputted from the pedal 11 is balanced, and a reaction force based on the hydraulic pressure in the boosted hydraulic pressure generating chamber 40 is applied to the control piston 41. In this way, the first reaction force piston 42 interposed between the pressure regulating valve means 39 and the control piston 41 and the brake pedal 11 In addition to the reaction force from the first reaction force piston 42, the output fluid pressure of the fluid pressure source 12 and the reaction force by the reaction force spring 44 are applied to the control piston 41 when the operation input increases. And a second reaction force piston 43 interposed between the backup piston 38 and the first reaction force piston 42.

  In the casing 17, a connection fluid path 45 that leads to the boost fluid pressure chamber 22, an input port 46 that is connected to the fluid pressure generation source 12, an output fluid path 47 that leads to the fluid pressure generation chamber 40, and the second sleeve 20. And a release port 48 communicating with a release chamber 49 formed in the casing 17 at a rear side thereof is provided in order from the front side.

  The fluid pressure generating source 12 is connected to the input port 46. The hydraulic pressure generation source 12 includes a pump 51 that draws hydraulic fluid from the third liquid reservoir chamber 31 c of the reservoir 31, and an accumulator 52 that is connected to the discharge side of the pump 51. The operation of the pump 51 is controlled according to the hydraulic pressure of the accumulator 52 detected by the pressure sensor 53, and a high constant hydraulic pressure is supplied from the hydraulic pressure generating source 12 to the input port 46. The release port 48 is connected to the third liquid reservoir chamber 31 c of the reservoir 31.

  Referring again to FIG. 1, the pressure regulating valve means 39 includes a pressure increasing valve interposed between the input port 46 and the boosted hydraulic pressure generating chamber 40, and a booster hydraulic pressure generating chamber 40 and a release chamber 49. The booster hydraulic pressure obtained by regulating the hydraulic pressure of the hydraulic pressure generating source 12 by opening and closing the pressure increasing valve and the pressure reducing valve according to the operation of the brake pedal 11 is provided. It is generated in the boost hydraulic pressure generating chamber 40.

  In such a hydraulic booster 13, a brake operation input from the brake pedal 11 is input to the control piston 41 via the stroke simulator 14, and a forward pressing force is applied from the control piston 41 to the first reaction force piston 42. Works. Thus, when the amount of movement of the control piston 41 in the forward direction relative to the backup piston 38 is less than a predetermined value, only the first reaction force piston 42 is in contact with the control piston 41 and the first reaction force piston 42 moves forward. Accordingly, the pressure reducing valve of the pressure regulating valve means 39 is closed, the space between the boost hydraulic pressure generating chamber 40 and the release chamber 49 is shut off, and the control piston 41 and the first reaction force piston 42 are further advanced to adjust the pressure regulating valve means. The 39 booster valve opens.

  In the closed state of the pressure reducing valve, the hydraulic pressure in the boost hydraulic pressure generating chamber 40 acts on the front end of the first reaction force piston 42, and the brake operation input from the brake pedal 11 and the boost hydraulic pressure generating chamber 40 are applied. When the first reaction force piston 42 and the control piston 41 are moved backward so as to balance the hydraulic pressure based on the hydraulic pressure, the pressure reducing valve opens and the pressure increasing valve closes. By repeating the opening and closing, the output hydraulic pressure of the hydraulic pressure generation source 12 is adjusted to the boost hydraulic pressure corresponding to the brake operation input from the brake pedal 11 and acts on the boost hydraulic pressure generation chamber 40. When the movement amount of the control piston 41 in the forward direction with respect to the backup piston 38 becomes a predetermined value or more, not only the first reaction force piston 42 but also the second reaction force piston 43 comes into contact with the control piston 41, and the hydraulic pressure The liquid pressure that presses the second reaction force piston 43 rearward by the liquid pressure from the generation source 12 and the spring force of the reaction force spring 44 are also applied as reaction forces, so the reaction force acting on the control piston 41 increases.

  A connection fluid path 45 provided in the casing 17 so as to communicate with the boost fluid pressure chamber 22 is connected to the fluid pressure generation source 12 via an electromagnetic valve 54 for pressurizing an automatic brake which is a normally closed linear solenoid. At the same time, it is connected to the third liquid reservoir chamber 31c of the reservoir 31 via an electromagnetic valve 55 for regenerative cooperative pressure reduction that is a normally closed linear solenoid valve. That is, a normally closed electromagnetic brake pressurizing solenoid valve 54 is interposed between the boost hydraulic chamber 22 and the hydraulic pressure generating source 12, and a normally closed regenerative cooperative pressure reduction between the boost hydraulic chamber 22 and the reservoir 31. An electromagnetic valve 55 is interposed.

  The output fluid passage 47 leading to the boost fluid pressure generating chamber 40 is connected to the connection fluid passage 45 via a solenoid valve 56 for pressure reduction of automatic brake and a solenoid valve 57 for regenerative cooperative pressurization connected in series. The electromagnetic valve 56 for automatic brake pressure reduction and the electromagnetic valve 57 for regenerative cooperative pressurization are both normally open linear solenoid valves.

  The electromagnetic valve 56 for automatic brake pressure reduction is connected in parallel with a first one-way valve 58 that permits the flow of hydraulic fluid from the output liquid path 47 to the connection liquid path 45 side, and the electromagnetic for regenerative cooperative pressurization. The valve 57 is connected in parallel with a second one-way valve 59 that allows the working fluid to flow from the connection fluid passage 45 to the output fluid passage 47 side.

  That is, an electromagnetic valve 56 for automatic brake pressure reduction, in which a first one-way valve 58 is connected in parallel, is interposed between the boost hydraulic pressure generation chamber 40 and the boost hydraulic pressure chamber 22, and the second one An electromagnetic valve 57 for regenerative cooperative pressurization, in which the directional valve 59 is connected in parallel, is interposed.

  In addition, a hydraulic pressure sensor 60 for detecting the brake operation amount is connected between the output liquid passage 47 and the automatic brake pressure reducing electromagnetic valve 56, and automatic brake feedback control is performed between the electromagnetic valve 57 for regenerative cooperative pressurization and the connecting liquid passage 45. A hydraulic pressure sensor 61 is connected.

  As described above, the electromagnetic valve 54 for pressurizing the automatic brake is interposed between the hydraulic pressure generation source 12 and the boost hydraulic pressure chamber 22, and between the boost hydraulic pressure generation chamber 40 and the boost hydraulic pressure chamber 22, The solenoid valve 56 for pressure reduction of the automatic brake is connected in parallel to the solenoid valve 56 for pressure reduction of the automatic brake so as to allow the flow of the brake fluid from the boost fluid pressure generating chamber 40 to the boost fluid pressure chamber 22 side. The first one-way valve 58 is interposed so that when the brake pedal 11 is not operated, that is, when the pressure regulating valve means 39 is not operated, the electromagnetic valve 54 for pressurizing the automatic brake and the pressure for reducing the automatic brake are used. Automatic brake control can be performed in which the brake fluid pressure is applied to the wheel brakes B1 to B4 in a non-brake operation state by controlling the opening and closing of the solenoid valve 56 to adjust the fluid pressure in the boost fluid pressure chamber 22. it can. In addition, when the brake pedal 11 is operated with the automatic brake pressure-reducing solenoid valve 56 closed during automatic braking, the pressure regulating valve means 39 is actuated, and the liquid pressure higher than the hydraulic pressure in the boost hydraulic pressure chamber 22 is reached. When pressure is generated in the boosted hydraulic pressure generating chamber 40, the hydraulic pressure in the boosted hydraulic pressure generating chamber 40 can be applied to the boosted hydraulic pressure chamber 22 via the first one-way valve 58. The master cylinder M can be operated in the same manner as when the brake is operated.

  An electromagnetic valve 55 for regenerative cooperative pressure reduction is interposed between the boost hydraulic chamber 22 and the reservoir 31, and an electromagnetic for regenerative cooperative pressurization is provided between the boost hydraulic pressure generation chamber 40 and the boost hydraulic pressure chamber 22. A second direction connected in parallel to the valve 57 and the electromagnetic valve 57 for regenerative cooperative pressurization so as to allow the brake fluid to flow from the boost hydraulic chamber 22 to the boost hydraulic generation chamber 40 side. Since the valve 59 is interposed, during regeneration in the brake operation state, the electromagnetic valve 57 for regenerative cooperative pressurization and the electromagnetic valve 55 for regenerative cooperative depressurization are controlled to open and close the hydraulic pressure in the boost hydraulic pressure chamber 22. Can be output from the master cylinder M in a state offset from that during normal braking. When the brake pedal 11 is returned when the electromagnetic valve 57 for regenerative cooperative pressurization is closed, Boost hydraulic chamber via second one-way valve 59 It can escape 2 hydraulic reservoir 31 side.

  The stroke simulator 14 includes an input piston 62 that is fluid-tightly and axially slidably fitted to the control piston 41, and a resilient means 63 that is interposed between the input piston 62 and the control piston 41. Built in the control piston 41.

  A front end portion of an input rod 64 connected to the brake pedal 11 is connected to the input piston 62 so as to be able to swing. That is, a brake operation force corresponding to the operation of the brake pedal 11 is input to the input piston 62 via the input rod 64, and the input piston 62 moves forward in response to the input of the brake operation force.

  The elastic means 63 includes an elastic body 65 formed in a cylindrical shape by an elastic material such as rubber, and a metal coil spring 66 having a spring load set smaller than that of the elastic body 65. The coil spring 66 is an elastic body after the spring force exerted by the coil spring 66 acts on the control piston 41 at the initial stage of the brake operation of the brake pedal 11 and the action of the spring force of the coil spring 66 on the control piston 41 ends. The elastic deformation of 65 is started, and is interposed between the input piston 62 and the control piston 41 in series.

  A rear end portion of a boot 67 that covers the protruding portion of the control piston 41 from the casing 17 is attached to the input rod 64, and the front end portion of the boot 67 is attached to the rear end portion of the casing 17.

  2 and 3, the casing 17 of the hydraulic booster 13 is attached to the dashboard 70 of the vehicle from the front side so that the rear end thereof protrudes toward the passenger compartment side. An opening 71 through which the rear end of the casing 17 is inserted is provided.

  The casing 17 of the hydraulic booster 13 is integrally provided with an overhanging portion 17a that protrudes to the side of the hydraulic booster 13, and the casing 17 including the overhanging portion 17a has a front side facing the dashboard 70. A flat support surface 72 is formed opposite to each other, and the support surface 72 is attached to the front surface of the dashboard 70 by a plurality of bolts 73.

  Referring to FIGS. 4 and 5 together, a cover 77 made of synthetic resin that forms a storage chamber 78 between the overhanging portion 17a and the overhanging portion 17a is attached to the overhanging portion 17a via a seal member 93. A solenoid valve and a hydraulic pressure sensor for executing at least one of the brake control and the regenerative brake control, in this embodiment, the solenoid valves 54 to 57 and the hydraulic pressure sensors 53, 60, 61 partially project into the storage chamber 78. An electronic control unit 74 that is attached to the overhanging portion 17 a and controls the operation of the electromagnetic valves 54 to 57 based on information including at least the detection values of the hydraulic pressure sensors 53, 60, 61 is covered in the storage chamber 78. 77 or attached to the overhanging portion 17a. In this embodiment, the electronic control unit 74 is attached to the cover 77. The first and second one-way valves 56 and 57 are built in the overhanging portion 17a.

  A flat mounting surface 75 facing the outside is formed on the overhanging portion 17a, and each of the solenoid valves 54 to 57 protrudes from the mounting surface 75 while causing the solenoid portions 76 of the 54 to 57 to protrude. It is fitted and fixed to the upper part of the part 17a. Further, each of the hydraulic pressure sensors 53, 60, 61 is fitted and fixed to the overhanging portion 17a below the portion where the electromagnetic valves 54 to 57 are disposed, with some of them protruding from the mounting surface 75. The

  The cover 77 is formed in a box shape with the overhanging portion 17a opened by a synthetic resin, and is fastened to the mounting surface 75 by a plurality of screw members 79. Between the mounting surface 75 and the cover 77, a seal member 93 that surrounds the solenoid valves 54 to 57 and the hydraulic pressure sensors 53, 60, 61 in an endless manner is interposed. Is attached to the opening edge of the cover 77.

  Solenoid openings 80 through which a part of the solenoid parts 76 of the solenoid valves 54 to 57 are inserted, and sensors corresponding to the hydraulic pressure sensors 53, 60, 61, are provided in the middle part of the cover 77. A support wall 82 having openings 81 for use is provided.

  The electronic control unit 74 is formed by mounting a semiconductor chip or the like on a substrate 83 on which an electric circuit is printed. The electronic control unit 74 is disposed in the cover 77 on the side opposite to the projecting portion 17a with respect to the support wall portion 82. The substrate 83 is fastened to a plurality of columns 84 provided on the support wall portion 82.

  A plurality of conductive metal bus bars 85 are embedded in the support wall 82, and terminals 86 extending from the coils 76a included in the solenoid portions 76 of the electromagnetic valves 54 to 57 are used for solenoids. The openings 80 are electrically connected to a part of the bus bar 85 by welding or the like. Accordingly, the coils 76a of the solenoid portions 76 are fixedly supported by the support wall portion 82 of the cover 77. Further, terminals 87... Extending from the respective hydraulic pressure sensors 53, 60, 61 are electrically connected to a part of the bus bar 85. Further, the electronic control unit 74 is electrically connected to a part of the bus bar 85 by wire bonding using an aluminum wire 88.

  The cover 77 is provided with a cover-side connector 90 so as to protrude forward from the overhanging portion 17a. The cover-side connector 90 includes a connector housing 91 formed in a box shape integrally with the cover 77, and a plurality of connector terminals 92 that are housed and supported in the connector housing 91. The connector terminals 92 are formed at the ends of the bus bars 85.

  An external conductor-side connector 95 provided in common at the ends of the plurality of external conductors 94 is detachably connected to the cover-side connector 90 connected to the cover 77. The connector housing 96 of the external conductor side connector 95 is inserted so that the connector housing 91 can be inserted and removed between the fitting portion 96a fitted to the connector housing 91 of the cover side connector 90 and the fitting portion 96a. The outer cylindrical portion 96b is integrally formed of synthetic resin and can be detachably engaged with the connector housing 91 of the cover-side connector 90.

  When the external conductor side connector 95 is connected to the cover side connector 90, a connector chamber 97 is formed between the connector housing 91 of the cover side connector 90 and the fitting portion 96a of the connector housing 96 of the external conductor side connector 95. In order to prevent water from entering between the contact surfaces of the connector housings 91 and 95 into the connector chamber 97, the outer surface of the fitting portion 96a is elastically contacted with the inner surface of the connector housing 91. An annular seal member 93 is attached.

  In the fitting portion 96a of the connector housing 96 of the external conductor side connector 95, connection holes 99 are provided with both ends opened to individually insert a plurality of connector terminals 92 provided in the cover side connector 90 from the inner end side. The connector terminals 100 formed in a female shape are arranged in the connection holes 99 so that the connector terminals 92 are removably fitted.

  Moreover, an annular seal member 101 is interposed between the outer surface of each external conductor 94 and the outer end side inner surface of each connection hole 99, and each external conductor 94 communicates with each seal member 101. Via the connector housing 96. Further, the sealing member 101 prevents the water from entering the connector chamber 97 through the connection holes 99 from the insertion portions of the external conductors 94 to the connector housing 96. A connecting portion of each external conductor 94 to the external conductor side connector 95 is covered with a boot 102 made of synthetic resin.

  The cover 77 is provided with a communication hole 103 that allows the connector chamber 97 formed between the cover side and the external conductor side connectors 90 and 95 to communicate with the storage chamber 78 formed between the cover 77 and the overhang portion 17a.

  In FIG. 6, a ventilation hole 104 whose outer end is opened toward the dashboard 70 side is provided in a portion corresponding to the overhanging portion 17 a in the support surface 72 provided in the casing 17. It communicates with the storage chamber 78 through a ventilation path 105 provided in the overhang portion 17a.

  The vent hole 104 has an inner end closed and a small diameter hole portion 104a in which the vent passage 105 is opened at a right angle to an intermediate portion, a medium diameter hole portion 104b having a larger diameter than the small diameter hole portion 104a, A large-diameter hole portion 104c having a larger diameter than the hole portion 104b forms an annular step portion 104d facing outward, between the small-diameter hole portion 104a and the medium-diameter hole portion 104b, and a tapered step portion 104e with an intermediate diameter. It is formed between the hole 104b and the large-diameter hole 104c and is coaxially connected.

  That is, the vent hole 104 is provided in the overhanging portion 17 a so that the inner end thereof communicates with the storage chamber 78 and the outer end opening portion faces the dashboard 70. A notch 106 is formed in which the outer end portion of the large-diameter hole portion 104b is opened toward the side of the overhang portion 17a.

  For example, a blocking member 107 formed in a circular sheet shape is made in contact with the stepped portion 104d in the vent hole 104 by a vent waterproof material represented by, for example, a product name Gore-Tex. On the other hand, a pressing member 109 having a through hole 108 at the center and formed in a disk shape with metal is press-fitted into the medium diameter hole 104 b of the vent hole 104. The pressing member 109 is integrally provided with a circular protrusion 109a protruding toward the closing member 107, and the closing member 107 is sandwiched between the protruding part 109a of the pressing member 109 and the stepped part 104d. The That is, the vent hole 104 is closed by the closing member 107.

  Next, the operation of this embodiment will be described. The casing 17 of the hydraulic booster 13 is integrally provided with an overhanging portion 17a that protrudes to the side of the hydraulic booster 13, and the overhanging portion 17a includes the overhanging portion 17a. A synthetic resin cover 77 forming a storage chamber 78 between the overhanging portion 17a is attached via a seal member 93, and electromagnetic valves 54 to 57 and a hydraulic pressure sensor for executing automatic brake control and regenerative brake control. 53, 60, 61 are attached to the overhanging portion 17a with a part thereof protruding into the storage chamber 78, and the operation of the electromagnetic valves 54-57 is based on information including at least the detection values of the hydraulic pressure sensors 53, 60, 61. An electronic control unit 74 is attached to the cover 77 in the storage chamber 78, and the first and second one-way valves 58 and 59 are built in the overhanging portion 17a.

  Therefore, the electromagnetic valves 54 to 57, the first and second one-way valves 58 and 59, the hydraulic pressure sensors 53, 60 and 61, and the electronic control unit 74 can be combined together with the hydraulic pressure booster 13 in a compact manner. It is possible to reduce the installation space when assembling to the vehicle, and to improve the assembling workability. In addition, since each of the solenoid valves 54 to 57, each of the hydraulic pressure sensors 53, 60, 61, and the electronic control unit 74 are covered with the cover 77, waterproofness when mounted on a vehicle can be obtained.

  A storage chamber 78 is provided between the connector housing 96 of the external conductor side connector 95 and the connector housing 91 of the cover side connector 90 provided on the cover 77 so as to connect the external conductor side connector 95 in a liquid-tight and detachable manner. A connector chamber 97 communicating with the outside is formed, and the storage chamber 78 can be ventilated with the outside through the vent hole 104.

  As a result, the internal pressure of the connector chamber 97 is suppressed as much as possible even when the internal pressure of the connector chamber 97 changes due to a temperature change caused by energization between the external conductor side connector 95 and the cover-side connector 90. , 96 can be prevented from occurring, and the suction of water due to capillary action from the gap between the insulating tube of the external conductors 94 and the conductors can be prevented.

  Moreover, the vent 104 is provided in the overhanging portion 17a, and the vent 104 can be easily formed. Further, since the outer end of the air hole 104 opens toward the dashboard 70 to which the casing 17 is attached, it is possible to prevent water, dust, and the like from entering the air hole 104 from the outside as much as possible.

Further, since the vent hole 104 is closed by the closing member 107 formed of a breathable waterproof material, it is possible to reliably prevent water from entering from the vent hole 104 into the storage chamber. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims.

  For example, in the above-described embodiment, the vehicle brake device including the electromagnetic valves 54 to 57 and the hydraulic pressure sensors 53, 60, 61 for executing both the automatic brake control and the regenerative brake control has been described. The present invention can also be applied to a vehicle brake device including an electromagnetic valve and a hydraulic pressure sensor that execute either one of brake control and regenerative brake control.

  The electronic control unit 74 may be attached to the overhanging portion 17a of the casing 17.

1 is a brake hydraulic pressure system diagram showing an overall configuration of a vehicle brake device. It is a vertical side view in the state where a master cylinder and a hydraulic booster were attached to a dashboard. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. It is a principal part enlarged view of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is an enlarged view of a portion indicated by an arrow 6 in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Brake pedal 12 which is a brake operation member ... Fluid pressure generation source 13 ... Fluid pressure booster 17 ... Casing 17a ... Overhang | projection part 53, 60, 61 ... Fluid pressure sensor 54, 55, 56, 57 ... Solenoid valve 70 ... Dashboard 74 ... Electronic control unit 77 ... Cover 78 ... Storage chamber 90 ... Cover side connectors 91, 96 ... Connector housing 95 ... External conductor side connector 97 ... Connector chamber 93 ... Sealing member 104 ... Vent hole 107 ... Closing member M ... Master cylinder

Claims (4)

  A hydraulic booster (13) that adjusts the output hydraulic pressure of the hydraulic pressure generation source (12) according to the brake operation of the brake operating member (11), and a master cylinder that operates with the output hydraulic pressure of the hydraulic pressure booster (13) (M), an electromagnetic valve (54, 55, 56, 57) and a hydraulic pressure sensor (53, 60, 61) for executing at least one of automatic brake control and regenerative braking control, and a hydraulic pressure sensor (53, 60, 61) In a vehicle brake device comprising an electronic control unit (74) for controlling the operation of the electromagnetic valves (54 to 57) based on information including at least the detection value of the hydraulic pressure booster (13). Synthetic resin which is provided integrally with the casing (17) and forms a storage chamber (78) between the overhanging portion (17a) and the overhanging portion (17a) which projects to the side of the hydraulic booster (13). The cover (77) is attached via a seal member (93), and the solenoid valve (54 to 57) and the hydraulic pressure sensor (53, 60, 61) partially project into the storage chamber (78). The electronic control unit (74) is attached to the cover (77) or the overhang portion (17a) in the storage chamber (78), and the external conductor side connector (95) is attached to the overhang portion (17a). ) Connector housing (96) and the external conductor side connector (95) in a liquid-tight and detachable manner so as to be detachably connected to the cover (77) cover-side connector (90) connector housing (91) A connector chamber (97) communicating with the storage chamber (78) is formed between the cover (77) and the overhanging portion (17a). Brake system, characterized in that permit venting and the vent (104) is provided between.   The vehicle brake device according to claim 1, wherein the vent hole (104) is provided in the projecting portion (17a).   The said vent (104) is provided in the said overhang | projection part (17a) so that an outer end may be opened toward the dashboard (70) to which the said casing (17) is attached, The said overhang | projection part (17a) is provided. Brake device for vehicles.   The vehicle brake device according to claim 3, wherein the vent hole (104) is closed by a closing member (107) formed of a breathable waterproof material.

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