JP4355271B2 - Hydraulic control device - Google Patents

Description

  The present invention relates to a hydraulic pressure control device that performs brake hydraulic pressure control of a vehicle.

2. Description of the Related Art Conventionally, there are brake hydraulic pressure control devices in which a control base is attached to a part of a motor and the motor control unit and the motor are integrated to reduce the size of the device. In this technique, a position sensor for detecting the rotation angle of the motor is provided close to the lead wire for energizing the motor coil, and the control board is arranged close to the motor (for example, Patent Documents). 1).
Japanese Patent Laid-Open No. 10-129445

  However, in the above prior art, since the lead wire, the position sensor, and the sensor harness are close to each other, the detection accuracy of the position sensor is reduced by the noise of the lead wire, and the amount of heat generated by the motor increases as the output increases. Therefore, this heat will interfere with the adjacent control base. Therefore, it is necessary to provide a shielding member between the motor and the control board as a countermeasure against noise and heat generation, and there is a problem that the number of parts and man-hours are increased.

  The present invention has been made by paying attention to the above problems, and its purpose is to provide a liquid that can secure the detection accuracy of the position sensor and can take countermeasures against heat of the control board without taking special countermeasures against noise and heat generation. The object is to provide a pressure control device.

In order to achieve the above object, according to the present invention, a pump for increasing the wheel cylinder pressure is disposed inside, a housing having a plurality of side surfaces, and a pump fixed to the first side surface of the housing by the rotating shaft. A brushless motor for driving the motor, a circuit board disposed on the second side surface disposed opposite to the first side surface, and a rotational position of the rotor disposed adjacent to the rotor of the brushless motor a position sensor for a motor harness that connects to the circuit board to transmit a driving signal to the brushless motor, the hydraulic pressure control device and a sensor harness for transmitting a detection signal of the position sensor to said circuit board, At least two or more through holes penetrating the first side surface and the second side surface are formed at a predetermined interval in the housing, and each through hole is formed. , It was decided to insert the sensor harness and the motor harness separately.

  Therefore, it is possible to provide a hydraulic pressure control device that can ensure the detection accuracy of the position sensor without taking special measures against noise and heat generation and can take measures against heat on the control board.

  Hereinafter, the best mode for realizing the hydraulic pressure control device of the present invention will be described based on Example 1 shown in the drawings.

[Oil channel configuration of hydraulic control device]
Example 1 will be described with reference to FIGS. FIG. 1 is a diagram showing an example of a hydraulic circuit of a front-by-wire hydraulic control unit to which the hydraulic control device of the present application is applied. The master cylinder 3 is a so-called tandem type, and can supply the same hydraulic pressure independently to the P system supplied via the oil passage 31 and the S system supplied via the oil passage 32. The master cylinder 3 is provided with a reservoir 2 for storing brake fluid.

  The present hydraulic pressure control device is a by-wire type brake unit that secures the wheel cylinder pressure by the pump 10 connected to the motor 50, and has a configuration in which the master cylinder pressure is not directly applied to the wheel cylinders FL and FR except during a failure. Therefore, in order to ensure the stroke of the brake pedal 1 at normal times, the master cylinder 3 is provided with a stroke simulator to ensure the driver's feeling of brake operation, and the desired amount of foil is detected by the pump 10 by detecting the operation amount by the stroke sensor. The cylinder pressure is obtained.

  Wheel cylinders FL and FR that generate braking force on the front wheels are connected to the master cylinder 3 via oil passages 31, 33, 32, and 34, respectively. Shutoff valves 11 and 12 are provided. In addition, hydraulic pressure sensors 21 to 24 are provided on the oil passages 31 and 32 on the master cylinder 3 side of the shut-off valves 11 and 12 and the oil passages 33 and 34, respectively. Only the hydraulic pressure sensor 22 is provided on the master side, and countermeasures against failures are taken by changing the arrangement position with other hydraulic pressure sensors provided on the unit side.

  The pump 10 is provided on an oil passage 35, the pump suction side is connected to the reservoir 2 by an oil passage 36, and the discharge side is provided with a hydraulic pressure sensor 25 and connected to oil passages 37 and 38. The oil passages 37 and 38 are connected to the oil passages 31 and 32 between the shut-off valves 11 and 12 and the oil passages 33 and 34, respectively, and check valves 17 and 18 for backflow prevention and normally open in order from the pump discharge side. In valves 13 and 14 which are proportional valves are provided.

  Also, oil passages 41, 42 that branch from the oil passages 31, 32 and connect to the oil passage 36 between the shutoff valves 11, 12 and the oil passages 33, 34 on the oil passages 31, 32 are provided. Is provided. The oil passages 41 and 42 are provided with out valves 15 and 16 which are normally closed proportional valves. Further, the oil passage 43 is provided with a relief valve 19, which opens when the hydraulic pressure from the pump 10 side exceeds a predetermined value, and returns the hydraulic pressure of the pump 10 to the reservoir 2. It has a configuration.

[Normal brake state]
During normal operation, the stroke of the brake pedal 1 is detected by a stroke simulator and a stroke sensor provided in the master cylinder 3, and so-called by-wire control is performed to drive the pump 10 based on the detected value to obtain a desired wheel cylinder pressure. In the by-wire control, the shut-off valves 11 and 12 are closed to prevent communication between the master cylinder 3 and the wheel cylinders FL and FR so that the master cylinder pressure is not introduced into the wheel cylinders FL and FR.

(When pressure is increased)
When the pressure is increased, the shut-off valves 11 and 12 are closed, the pump 10 is operated by the motor 50, and the brake fluid in the reservoir 2 is introduced into the pump 10 through the oil passages 36 and 35. At this time, since the in valves 13 and 14 are normally open and the out valves 15 and 16 are normally closed, the brake fluid increased in pressure by the pump 10 is supplied to the wheel cylinders FL and FR via the oil passages 37 and 38 and 33 and 34. The pressure is increased. When the discharge side of the pump 10 becomes equal to or higher than a predetermined hydraulic pressure, the relief valve 19 is opened to provide a fail-safe function in which excess pressure is returned to the reservoir 2.

(When holding)
At the time of holding, the in-valves 13 and 14 are closed while the shut-off valves 11 and 12 and the out valves 15 and 16 are closed, and the wheel cylinder pressure is held. When the holding state is continued for a certain time or longer, the operation of the motor 50 and the pump 10 is stopped, and the time during which the excess pressure generated by the pump 10 is returned to the reservoir 2 through the relief valve 19 is shortened. To improve the energy efficiency.

(At reduced pressure)
During decompression, the shut-off valves 11 and 12 are closed, the in valves 13 and 14 are closed, the out valves 15 and 16 are opened and proportionally controlled, and the oil passages 33 and 34, the oil passages 41 and 42, and the oil passage The wheel cylinder pressure is returned to the reservoir 2 via 36 to reduce the pressure. When the holding time of the in-valves 13 and 14 is equal to or longer than a certain value, the operation of the motor 50 and the pump 10 is stopped similarly to the holding time to reduce the driving time of the motor 50.

[Fail control]
When the motor 50 or the pump 10 breaks down, the shut-off valves 11 and 12 are opened, and the master cylinder pressure is directly introduced into the wheel cylinders FL and FR via the oil passages 31, 33, 32, and 34, and the braking force is increased. obtain. Here, since the shut-off valves 11 and 12 are normally open valves, when the shut-off valves 11 and 12 themselves fail, the valves are automatically opened to ensure manual braking.

  Further, the hydraulic circuit of the present embodiment is bilaterally symmetric, and each electromagnetic valve may be controlled independently on the left and right. For example, the left wheel can be boosted and the right wheel can be held or depressurized. When pressure is increased or decreased simultaneously on the left and right, the amount of pressure increase or decrease on the left and right wheels can be different, and vehicle behavior control or the like can be performed. .

[Overall configuration of hydraulic pressure control device]
(Skeleton diagram)
FIG. 2 is an overall view of the hydraulic pressure control apparatus of the present application. For the sake of explanation, FIG. 2 shows an oil passage as a skeleton. As shown in the hydraulic circuit diagram of FIG. 1, the hydraulic pressure control device includes shut-off valves 11 and 12, in-valves 13 and 14, out-valves 15 and 16, check valves 17 and 18, a relief valve 19, and hydraulic pressure sensors 21 to 21. 24 for communicating / blocking each oil passage.

  A pump cover 60 is provided on the x-axis negative side surface 101 (second side surface) of the hydraulic pressure control device. Further, a brushless type motor 50 is provided on the x-axis positive side surface 102 (first side surface), and U, V, and W phase lead wires 51 that drive the motor 50 and the rotation angle of the motor 50 are detected. A sensor harness 52 connected to the position sensor is disposed.

  The lead wire 51 is disposed on the y-axis positive direction side of the pump cover 60, and the sensor harness 52 is provided between the hydraulic pressure sensors 23 and 24 sandwiched between the in-valves 13 and 14. As a result, the lead wire 51 and the sensor harness 52 are disposed across the oil passages 35, 37, and 38 that connect the check valves 17 and 18 and the pump 10, and are provided at predetermined intervals. It becomes.

(Perspective view)
FIG. 3 is a perspective view of the hydraulic pressure control device. Each oil passage shown in FIG. 1 is formed in the housing 100 by perforation. A cover 200 for storing the pump 10 and a control unit 300 (see FIG. 6) as a circuit board is provided on the x-axis negative side surface 101 of the housing 100, and a motor 50 is provided on the x-axis positive direction side surface 102. .

[Details of housing]
(Front view)
FIG. 4 is a front view of the housing 100. In addition to the oil passages, the housing 100 is provided with storage holes 111 to 11 6 and 121 to 124 for storing the solenoid valves 11 to 16 and the hydraulic pressure sensors 21 to 24 shown in FIG. The pump stores hole 110 for storing the pump 10 is provided in a lower portion of the storage hole 111 to 11 6 and 121, 123, 124.

The housing 100 is provided with through holes 151 and 152 through which the lead wire 51 of the motor 50 and the sensor harness 52 are inserted. The through holes 151 and 152 are provided at positions corresponding to the lead wires 51 and the sensor harness 52 shown in FIG. 2, respectively, and connect the motor 50 and the control unit 300 (see FIG. 6 ). That is, the lead wire insertion hole 151 is disposed on the positive side of the pump storage hole 110 in the y- axis direction , and the sensor harness insertion hole 152 is provided between the hydraulic pressure sensor storage holes 123 and 124. 51 and the sensor harness 52 are provided to be separated from each other with a predetermined interval.

(Side view and sectional view)
FIG. 5 is a side view of the hydraulic pressure control device, FIG. 6 is a partial cross-sectional view taken along the line AA of the housing 100 in FIG. 4, and the motor 50 is a side view. As described above, the housing 100 is provided with the lead wire insertion hole 151 and the sensor harness insertion hole 152 that penetrate the side surfaces in the x-axis positive and negative directions, and the motor 50 and the cover 200 are inserted through the lead wire 51 and the sensor harness 52, respectively. The control unit 300 inside is connected.

[Influence of lead wire heat generation and noise on position sensor]
Since the lead wire 51 supplies electric power to the motor 50, heat and noise are generated with the operation of the motor 50. In the by-wire type brake system as in the embodiment of the present invention, the braking force is generated by the motor 50, so that the operation time is long and the output needs to be large. The heat and noise generated by 51 also increases. In order to avoid electrical noise of each solenoid valve, it is desirable that the sensor harness 52 be disposed apart from the lead wire 51 and each solenoid valve 11-16.

When the hydraulic circuit of the present application shown in FIG. 1 is applied, in order to separate the lead wire 51 and the electromagnetic valves 11 to 16 from each other, the lead wire 51 and the sensor harness 52 are separated as much as possible in the z-axis direction (see FIG. 6). Although it is necessary, if the lead wire 51 is arranged on the z-axis negative direction side with respect to the pump housing hole 110, the base of the control unit 300 needs to be extended in the z-axis negative direction and connected to the lead wire 51. Will lead to an increase in size. Pump cover 60 is attached in a liquid-tight manner, also lead 51 is desirably provided on the side of the pump storage hole 110 from the viewpoint of this, in the present embodiment the y-axis positive direction side of the pump storage holes 110 Are provided with lead wire insertion holes 151.

  In order to separate the lead wire 51 from the lead wire 51, the sensor harness 52 is desirably provided on the positive z-axis direction side, but the solenoid valves 11 to 16 are provided on the positive z-axis direction side of the housing 100. There is a concern about the influence of noise of each solenoid valve. Therefore, in this embodiment, a sensor harness insertion hole 152 is provided between the hydraulic pressure sensor storage holes 123 and 124.

  Therefore, the lead wire 51 and the sensor harness 52 are provided to be spaced apart from each other at a predetermined interval, and the influence of heat and noise of the lead wire 51 on the sensor harness 52 can be reduced. Further, the sensor harness 52 is sandwiched between the hydraulic pressure sensors 23 and 24, and is configured to reduce the influence of noise caused by each electromagnetic valve. The lead wire 51 and each electromagnetic valve 11 are used without using a shielding plate or the like. The influence of ˜16 heat and noise is minimized, and the detection accuracy of the position sensor is ensured.

  Moreover, since the noise and heat generation of the lead wire 51 may affect the operation of the electromagnetic valves 11 to 16, it is desirable that the lead wire 51 and the electromagnetic valves 11 to 16 be separated as much as possible. In the embodiment of the present application, the lead wire insertion hole 151 is provided on the y-axis positive direction side of the pump storage hole 110 of the housing 100, so that each of the solenoid valves 11-16 and the lead wire 51 arranged on the z-axis positive direction side of the housing 100. The operation reliability of each of the solenoid valves 11 to 16 is ensured without using a noise shield wire or the like.

[Contrast of the effects of the conventional example and the present embodiment]
Conventionally, there is a brake hydraulic pressure control device in which a control base is attached to a part of a motor and the motor control unit and the motor are integrated to reduce the size of the device. Since the lead wire and the position sensor and sensor harness are close to each other, the detection accuracy of the position sensor decreases due to the noise of the lead wire, and the amount of heat generated by the motor increases as the output increases. There is a problem that the control infrastructure is disturbed. Therefore, there is a problem that it is necessary to provide a shielding member between the motor and the control board as a countermeasure against noise and heat generation.

  On the other hand, in this embodiment, the motor 50 is disposed on the x-axis positive side surface 102 (first side surface) of the housing 100, and the control unit 300 (circuit board) is disposed on the x-axis negative direction side surface 101 (second side surface). Arranged. The housing 100 is formed with at least two x-axis through holes penetrating the x-axis positive and negative side surfaces, and one through-hole is disposed on the y-axis positive direction side of the pump storage hole 110 to lead wire insertion hole 151. The other through hole is arranged between the hydraulic pressure sensor storage holes 123 and 124 to form a sensor harness insertion hole 152, and the lead wire 51 and the sensor harness 52 are inserted separately.

  As a result, the lead wire 51 and the sensor harness 52 are separated from each other, and the influence of heat and noise generated from the lead wire 51 on the sensor harness 52 can be reduced, and the output of the motor 50 is increased. However, it is possible to avoid a decrease in the detection accuracy of the position sensor without taking special measures against heat. Further, by separating the lead wire 51 and the sensor harness 52, it is possible to take measures against heat of the control unit 300 without taking special measures such as a shielding plate (corresponding to claim 1).

  In addition, oil passages 35, 37, and 38 that connect the pump 10 and the check valves 17 and 18 are provided between the lead wire insertion hole 151 and the sensor harness insertion hole 152. Thereby, the lead wire insertion hole 151 and the sensor harness insertion hole 152 are provided in the gaps between the oil passages, and space saving can be achieved. Further, by separating the lead wire 51 from each solenoid valve, the influence of heat generation and noise of the lead wire 51 on each solenoid valve can be reduced, and the reliability of the apparatus can be improved without using a noise shield wire or the like ( Corresponds to claim 2).

[Other Examples]
Although the best mode for carrying out the present invention has been described based on the first embodiment, the specific configuration of the present invention is not limited to each embodiment and does not depart from the gist of the present invention. Any changes in the design of the range are included in the present invention.

It is a figure which shows one example of the hydraulic circuit of the front-by-wire type hydraulic control unit to which this-application hydraulic control apparatus is applied. It is a general view of a hydraulic control device. It is a perspective view of a hydraulic control device. It is a front view of a housing. It is a side view of a hydraulic control device. It is AA fragmentary sectional view of the housing in FIG.

Explanation of symbols

10 pump 50 motor 51 lead wire 52 sensor harness 100 housing 101 x-axis negative side surface (second side surface)
102 x-axis positive side surface (first side surface)
151 Lead wire insertion hole (through hole)
152 Sensor harness insertion hole (through hole)

Claims (1)

A pump for increasing the wheel cylinder pressure is disposed inside, a housing having a plurality of side surfaces,
A brushless motor fixed to the first side surface of the housing and driving the pump by a rotating shaft;
A circuit board disposed on the second side surface disposed opposite to the first side surface;
A position sensor that is arranged close to the rotor of the brushless motor and detects the rotational position of the rotor ;
A motor harness that transmits a drive signal to the brushless motor and connects to the circuit board;
A sensor harness for transmitting a detection signal of the position sensor to the circuit board;
In the hydraulic pressure control device comprising:
Forming at least two or more through holes penetrating the first side surface and the second side surface at a predetermined interval in the housing;
The hydraulic pressure control device, wherein the motor harness and the sensor harness are separately inserted into the through holes.

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