JP6045816B2 - Brake hydraulic pressure control device - Google Patents

Description

  The present invention relates to a brake fluid pressure control device suitable for a brake control system for a motorcycle, and more specifically, separates the brake control system of two front and rear wheels into one system, and has a hydraulic circuit component arrangement structure. The present invention relates to a brake fluid pressure control device having features.

  The brake control system for motorcycles is provided with two brake control systems for the front and rear wheels, and as shown in Patent Document 1 below, these two brake control systems are controlled together by a hydraulic circuit. A so-called two-channel brake fluid pressure control device is generally employed. In such a two-channel type brake hydraulic pressure control device, the hydraulic circuit for the front wheel and the hydraulic circuit for the rear wheel are integrally accommodated in a single housing.

  In addition, in the brake control system for motorcycles, in addition to the normal mode in which the braking force corresponding to the amount of operation is directly transmitted to the wheels by operating the brake lever or brake pedal, running on slippery road surfaces such as wet road surfaces is also possible. There are many ABS (anti-lock braking system) modes that automatically release the wheel lock that occurs when the brakes are applied suddenly, and perform intermittent wheel braking.

  Furthermore, as shown in Patent Document 1 below, when the braking force of the front and rear wheels is controlled so that the braking force of the front and rear wheels always becomes an ideal balance, or when the braking force of the wheel by the driver's operation is insufficient There are also brake control systems for motorcycles that incorporate a boost mode that automatically assists the braking force that is insufficient. And the hydraulic circuit for switching and executing each of these modes suitably and the hydraulic circuit component which comprises this hydraulic circuit are accommodated in the single housing mentioned above.

JP 2009-190535 A

However, as shown in Patent Document 1, if the hydraulic circuits of the two front and rear wheels are integrally accommodated in a single housing, the housing becomes large and the structure becomes complicated. In addition, since the hydraulic circuits of the two front and rear wheels cannot be separated, the structure of the hydraulic circuits of these two systems and the arrangement of the hydraulic circuit components are limited, and the degree of freedom of selection is reduced.
On the other hand, if a one-channel type brake hydraulic pressure control device that accommodates the hydraulic circuit on the front wheel side and the hydraulic circuit on the rear wheel side in separate housings is adopted, the above-described problem of Patent Document 1 is solved. However, simply adopting a configuration in which the front wheel side hydraulic circuit and the rear wheel side hydraulic circuit are housed in separate housings cannot cause the brake hydraulic pressure control device to execute the above-described boost mode.

  Accordingly, the present invention is based on the premise that a one-channel type brake hydraulic pressure control device with a high degree of freedom in arrangement can be achieved, and the liquid can be adapted to various modes. An object of the present invention is to provide a brake hydraulic pressure control device which can facilitate the brake control by reducing the number of hydraulic circuit parts to be controlled, and can make the pressure circuit multi-functional and simplify the pipeline structure and hydraulic circuit. And

  In order to solve the above problems, a brake fluid pressure control device according to a first aspect of the present invention is a brake fluid pressure control device for controlling a brake pressure applied to a wheel, and the brake fluid pressure control device includes: It can be arranged between the master cylinder that generates hydraulic fluid pressure according to the amount of operation of the brake lever, etc., and the wheel cylinder that operates the brake by the hydraulic fluid pressure supplied via the connecting pipe. The brake fluid pressure control device is provided with only one system of fluid pressure circuit capable of manually and / or automatically reducing, increasing and maintaining the fluid pressure of the hydraulic fluid in a single housing, One system of hydraulic pressure circuit is provided with a hydraulic pump for pressure reduction and a hydraulic pump for pressure increase driven by a single motor.

According to this aspect, the hydraulic circuit formed in the housing can be simplified, and the size and weight of the housing can be reduced by reducing the number of components of the hydraulic circuit components. In addition, the brake control system of the two front and rear wheels can be separated, and the degree of freedom of arrangement of the brake fluid pressure control device is improved.
Further, by separating the pressure reducing pumps for pressure reduction and pressure increasing, the structure of the pipe line can be simplified and the addition of hydraulic circuit parts such as cut valves can be prevented.

  Further, as in the second aspect of the present invention, the hydraulic circuit of the one system includes a flow path of hydraulic fluid during normal mode execution and an ABS mode execution time in which the pressure reduction hydraulic pump is arranged. And a hydraulic fluid flow path when the pressure increasing mode is executed in which the pressure increasing hydraulic pump is disposed, and the hydraulic fluid flow path and the ABS when the pressure increasing mode is executed. The flow path of the hydraulic fluid when the mode is executed may be arranged so as to be distributed to the left and right of the hydraulic fluid path when the normal mode is executed.

According to this aspect, the hydraulic fluid circuit when the normal mode is executed, the hydraulic fluid channel when the ABS mode is executed, and the hydraulic fluid channel when the pressure mode is executed are clearly divided into the hydraulic circuit. It becomes easy to understand the configuration of
In addition, since the shared portion of the hydraulic fluid flow path when the ABS mode is executed and the hydraulic fluid flow path when the pressure increase mode is executed is extremely small, liquid such as a check valve that is required when these flow paths are shared is used. The pressure circuit component can be omitted.

Further, as in the third aspect of the present invention, the pressure reducing hydraulic pump is a plunger type pump having a valve opening pressure larger than atmospheric pressure, and the pressure increasing hydraulic pump has a valve opening pressure of You may be comprised by the suction type plunger type pump smaller than atmospheric pressure.
According to this aspect, a hydraulic pump having a valve opening pressure that is optimal for decompression of the flow path can be selected for the hydraulic fluid flow path when the ABS mode is executed. It is possible to select a hydraulic pump having a valve opening pressure optimum for increasing pressure. Further, since the structure of the pipe line can be simplified and the provision of a cut valve or the like can be omitted, it is possible to contribute to a reduction in the number of parts of the hydraulic circuit parts.

  Further, as in the fourth aspect of the present invention, the one-system hydraulic circuit includes the hydraulic fluid flow path when the normal mode is executed, the hydraulic fluid flow path when the ABS mode is executed, and when the boost mode is executed. A switching path that can be switched between the hydraulic fluid flow path, a switching valve disposed on the upstream side of the master cylinder on the hydraulic fluid flow path when the normal mode is executed, and the hydraulic fluid when the normal mode is executed A dosing valve disposed at a downstream position on the wheel cylinder side on the flow path, a relief valve disposed at an upstream position on the wheel cylinder side on the flow path of the hydraulic fluid when executing the ABS mode, and when performing the ABS mode. A reservoir disposed at a position downstream of the release valve on the hydraulic fluid flow path, and a pressure reducing pressure pump provided at a downstream position of the reservoir on the hydraulic fluid flow path during execution of the ABS mode A high-pressure suction valve disposed upstream of the master cylinder on the hydraulic fluid flow path when the boost mode is executed, and a downstream position of the high-pressure suction valve on the hydraulic fluid flow path when the boost mode is executed. A hydraulic pump for increasing pressure, a hydraulic pump for reducing pressure, a single motor for driving the hydraulic pump for increasing pressure, an operation amount of the brake lever, etc., and a pressure of hydraulic fluid flowing in the pipeline And an electronic control unit for controlling the opening and closing of the four types of valves and the driving and stopping of the motor based on the change in wheel speed.

  According to this aspect, the normal mode in which the braking force corresponding to the operation amount is directly transmitted to the wheel by the operation of the brake lever or the like, and the lock of the wheel that occurs when the brake is suddenly applied when traveling on a wet road surface, etc. The ABS mode to prevent and the boost mode that can be used for CBS (interlocking brake system) that compensates the braking force transmitted to the wheel and controls the braking force of the front and rear wheels to be in an ideal balance at all times. It is possible to provide a brake fluid pressure control device that can be switched and executed as appropriate.

The brake hydraulic pressure control device according to the fifth aspect of the present invention includes a master cylinder that generates hydraulic pressure of hydraulic fluid corresponding to an operation amount of a brake lever, etc., and hydraulic fluid supplied via a connecting pipe. A brake fluid pressure control device disposed between a wheel cylinder that operates a brake by fluid pressure, and the brake fluid pressure control device includes a conduit that forms a fluid flow path in a single housing; , A plunger-type hydraulic pump for pressure reduction and a hydraulic pump for pressure increase driven by a single motor, and a switching valve that is used as appropriate when the hydraulic pressure of the hydraulic fluid is reduced, increased and held In addition, there is provided only one set of four types of solenoid valves, a storage valve, a relaxation valve, and a high-pressure intake valve, a reservoir used during pressure reduction, and a stroke simulator used during pressure increase.
According to this aspect, since only one set of hydraulic circuit parts for reducing, increasing and holding the hydraulic pressure of the hydraulic fluid is provided in a single housing, the number of parts of the hydraulic circuit parts is reduced. The housing can be reduced in size and weight, and the degree of freedom in arranging the brake fluid pressure control device is improved.

Further, as in the sixth aspect of the present invention, the housing is a flat rectangular block-shaped member having a large area on the two opposing surfaces and a small area on the remaining four surfaces. The four kinds of solenoid valves are arranged so as to face one end face of one of the faces, and the reservoir and the end face of the stroke simulator face one face of the four faces of the small area housing. And one end face of the pressure reducing pressure pump and the pressure increasing pressure reducing pump face each of two faces facing the mounting direction of the reservoir and the stroke simulator after the four faces of the housing having a small area. May be arranged.
According to this aspect, four types of solenoid valves, a reservoir and a stroke simulator, and two hydraulic pumps for pressure reduction and pressure increase are arranged with respect to the housing in a regularly aligned state. The structure of the pipe line becomes simple, and the mounting and assembling work becomes easy.

Further, as in the seventh aspect of the present invention, the switching is performed on one side of the housing hole for housing the hydraulic pump for hydraulic pressure and the housing hole for housing the hydraulic pump for pressure increase. The valve and the intake valve may be arranged on the other side, and the high-pressure intake valve and the release valve may be arranged on a straight line parallel to the plunger driving direction of the pressure reducing hydraulic pump and the pressure increasing hydraulic pump, respectively. .
According to this aspect, it is necessary to form the communication holes formed in the housing diagonally across the hydraulic pumps for pressure reduction and pressure increase in order to form the flow path for the hydraulic fluid, or to increase the number of communication holes excessively. Disappears. Therefore, the communication hole can be formed in the housing with a compact and neat layout. In addition, a switching valve and a containment valve having similar shapes are disposed on the one side, and a high pressure suction valve and a release valve having similar shapes are disposed on the other side, so that these four kinds of electromagnetic valves And the placement of a well-balanced solenoid valve becomes possible.

Further, as in the eighth aspect of the present invention, the storage valve and the loosening valve are located near the accommodation hole for accommodating the pressure reducing hydraulic pump, and the accommodation hole for accommodating the pressure increasing hydraulic pump. The switching valve and the high-pressure intake valve are disposed on the straight lines intersecting the plunger driving directions of the pressure reducing hydraulic pressure pump and the pressure increasing hydraulic pressure pump, respectively. The stroke simulator may be arranged in the vicinity of the reservoir and the high-pressure intake valve, respectively.
According to this aspect, the conduit that communicates the intake valve and the release valve, the conduit that communicates the switching valve and the high-pressure intake valve, the conduit that communicates the release valve and the reservoir, and the high-pressure intake valve And the conduit connecting the stroke simulator can be set short. Accordingly, the layout of the communication holes formed in the housing can be made more compact and clear, and the housing can be further reduced in size and weight.

As in the ninth aspect of the present invention. At the center of the four types of solenoid valves, a pressure sensor for detecting the hydraulic pressure of the working fluid flowing in the pipe line is disposed, and one end surface of the pressure sensor is one of the two surfaces having a large area of the housing. It may be provided to face.
According to this aspect, it is possible to effectively use the space formed in the center of the four types of solenoid valves, and it is possible to arrange the hydraulic circuit components efficiently and without waste. Therefore, the housing can be further reduced in size and weight, and the degree of freedom in arranging the brake fluid pressure control device is improved.

  According to the brake fluid pressure control device of the present invention, the housing can be reduced in size and weight, and the hydraulic circuit structure can be simplified. In addition, the brake control system of the two front and rear wheels systems can be separated, and the degree of freedom of arrangement of the brake fluid pressure control device is expanded. Furthermore, by providing two hydraulic pumps separately for the pressure reducing hydraulic pressure pump and the pressure increasing hydraulic pressure pump, the hydraulic fluid flow path during the ABS mode and the hydraulic fluid flow during the pressure increasing mode are provided. It is possible to clearly distribute the path, and the arrangement of the hydraulic circuit parts is made more efficient by shortening the pipe line, thereby further reducing the size and weight of the housing and further arranging the hydraulic circuit. Layout becomes possible.

It is a hydraulic circuit diagram showing an example of a hydraulic circuit applied to a brake hydraulic pressure control device according to an embodiment of the present invention. It is a block diagram showing an example of a detection element and a control element of a brake fluid pressure control device concerning an embodiment of the invention. It is a perspective view which shows an example of the pipe line structure of the housing of the brake hydraulic pressure control apparatus which concerns on embodiment of this invention, and the arrangement configuration of hydraulic circuit components. It is a front view which shows an example of the arrangement configuration of the hydraulic circuit component with respect to the housing of the brake hydraulic pressure control apparatus which concerns on embodiment of this invention. FIG. 2 is a hydraulic circuit diagram showing a flow of hydraulic fluid when a normal mode is executed in the hydraulic circuit of FIG. 1 applied to a brake hydraulic pressure control device according to an embodiment of the present invention. FIG. 2 is a hydraulic circuit diagram showing a flow of hydraulic fluid when an ABS mode is executed in the hydraulic circuit of FIG. 1 applied to the brake hydraulic pressure control device according to the embodiment of the present invention. FIG. 2 is a hydraulic circuit diagram showing a flow of hydraulic fluid during execution of a boost mode in the hydraulic circuit of FIG. 1 applied to a brake hydraulic pressure control device according to an embodiment of the present invention.

The brake fluid pressure control apparatus of the present invention will be described with reference to the drawings, taking the following embodiment as an example.
In the following description, first, the configuration of the hydraulic circuit applied to the brake hydraulic pressure control device according to the embodiment of the present invention based on the hydraulic circuit diagram shown in FIG. 1 and the block diagram shown in FIG. An outline of the brake fluid pressure control will be described. Next, on the basis of the perspective view shown in FIG. 3 and the front view shown in FIG. 4, the conduit configuration of the housing and the arrangement configuration of the hydraulic circuit components of the brake hydraulic pressure control device according to the embodiment of the present invention will be described. .
Subsequently, based on the hydraulic circuit diagrams shown in FIGS. 5 to 6, the operation mode of hydraulic circuit components and the flow of the hydraulic fluid are divided into the normal mode execution time, the ABS mode execution time, and the pressure increase mode execution time. Will be explained.

(1) Configuration of hydraulic circuit and outline of brake hydraulic pressure control (see FIGS. 1 and 2)
The brake fluid pressure control device 1 according to the present invention includes a master cylinder 5 that generates a fluid pressure of the hydraulic fluid L according to the operation amount of the brake lever 3 and the like, and the hydraulic fluid L supplied via the connecting lines 7 and 8. It arrange | positions between the wheel cylinders 11 which act | operate the brake 9 with the hydraulic pressure.
In the brake hydraulic pressure control device 1 of the present invention, only one system of hydraulic circuit 15 capable of reducing, increasing and holding the hydraulic pressure of the hydraulic fluid L in the single housing 13 manually and / or automatically. The one-system hydraulic circuit 15 includes a pressure reducing hydraulic pump 29A and a pressure increasing hydraulic pump 29B driven by a single motor 31.

FIG. 1 also shows a front wheel hydraulic circuit 15 that can be applied to hydraulic control of the brake 9 of the front wheel 17.
This hydraulic circuit 15 is operated in the normal mode in which the braking force corresponding to the operation amount is directly transmitted to the front wheel 17 by the operation of the brake lever 3, and the front wheel 17 generated when the brake is suddenly applied when traveling on a wet road surface or the like. An ABS mode that prevents the vehicle from locking, and an interlocking brake system that supplements (assists) the braking force transmitted to the front wheel 17 and controls the braking force of the front and rear wheels to always have an ideal balance (for example, 7: 3). The voltage boosting mode that can be used for the switching is appropriately switched and executed.

  Specifically, the conduit 19 can switch between the flow path of the hydraulic fluid L when executing the normal mode, the flow path of the hydraulic fluid L when executing the ABS mode, and the flow path of the hydraulic fluid L when executing the pressure increase mode. And a switching valve 21 arranged at the upstream position on the master cylinder 5 side on the flow path of the hydraulic fluid L when executing the normal mode, and a downstream position on the wheel cylinder 11 side on the flow path of the hydraulic fluid L when executing the normal mode. An intake valve (inlet valve) 23 arranged, a loosening valve (outlet valve) 25 arranged at an upstream position on the wheel cylinder 11 side on the flow path of the hydraulic fluid L when the ABS mode is executed, and when the ABS mode is executed A reservoir (accumulator) 27 disposed at a position downstream of the release valve 25 on the flow path of the hydraulic fluid L, and a reservoir 27 on the flow path of the hydraulic fluid L when the ABS mode is executed. A hydraulic pump 29A for pressure reduction provided at the downstream position, a high-pressure suction valve 33 disposed at an upstream position on the master cylinder 5 side on the flow path of the hydraulic fluid L when executing the boost mode, and a hydraulic fluid when executing the boost mode A stroke simulator 63 provided at a position downstream of the high-pressure intake valve 33 on the flow path of L, a hydraulic pump 29B for pressure increase provided at a position downstream of the stroke simulator 63 on the flow path of the hydraulic fluid L during execution of the pressure increasing mode, A single motor 31 that drives the hydraulic pressure pump 29A for pressure reduction and a hydraulic pressure pump 29B for pressure increase, a pressure sensor 35 that detects the pressure of the hydraulic fluid L flowing in the conduit 19, and the speed of the front wheel 17 are detected. Four types of valves 21 based on the speed sensor 37 to be operated, the amount of operation of the brake lever 3 and the information detected by the pressure sensor 35 and the speed sensor 37, By and an electronic control unit (ECU) 39 for controlling the drive and stop of opening and closing the motor 31 of 3,25,33, the hydraulic circuit 15 is basically formed.

Further, in the present embodiment, the flow path of the hydraulic fluid L when executing the boost mode and the flow path of the hydraulic fluid L when executing the ABS mode are sandwiched between the hydraulic fluid L when executing the normal mode, It is distributed and arranged.
The pipe 19 has one end connected to the end of the connecting pipe 7 extending from the master cylinder 5 and the other end connected to the end of the connecting pipe 8 extending from the wheel cylinder 11, and the pipe 19 a As an example of branching from the middle and joining again in the middle of the pipeline 19a, the pipeline 19b deployed to the right in FIG. 1, and branching from the middle of the pipeline 19a to join again in the middle of the pipeline 19a. As an example, in FIG. 1, a pipeline 19 c that is developed to the left is provided as a main pipeline.

The switching valve 21 and the fill valve 23 are arranged in series in the pipe line 19a as shown in the figure. In the pipe line 19b, the above-described relaxation valve 25, the reservoir 27, and the hydraulic pump 29A for pressure reduction are arranged. Further, the high-pressure suction valve 33, the stroke simulator 63, and the hydraulic pressure pump 29B for pressure increase are arranged in the pipe line 19c.
The pipe 19a is provided with a bypass pipe 19d that connects the upstream and downstream of the switching valve 21, and a bypass pipe 19e that connects the upstream and downstream of the filling valve 23. The bypass pipe 19d includes a check valve 43. The check valve 45 is disposed in each bypass pipe 19e.

Further, the branch line 19b is provided with a branch pipe 19f between the release valve 25 and the pressure reducing hydraulic pump 29A, and the above-described reservoir 27 is provided at the end of the branch pipe 19f. Further, the branch line 19c is provided with a branch pipe 19g between the high pressure suction valve 33 and the pressure-increasing hydraulic pump 29B, and the stroke simulator 63 described above is provided at the end of the branch pipe 19g. .
Further, the pipe 19a is provided with a branch pipe 19h at a branch point 47c with the pipe 19b, and the pressure sensor 35 described above is disposed at the end of the branch pipe 19h.

Further, the pressure reducing hydraulic pump 29A is a plunger type pump whose valve opening pressure is larger than atmospheric pressure, and the pressure increasing hydraulic pressure pump 29B is a suction type plunger type pump whose valve opening pressure is smaller than atmospheric pressure. It is constituted by.
The two hydraulic pumps 29A and 29B are arranged on the left and right sides of a motor 31 composed of a DC motor as an example, and are attached to the output shaft of the motor 31. By being in sliding contact with the circumferential surface of the eccentric cam, the predetermined hydraulic pump pump 29A and 29B are alternately moved along the plunger driving direction A by a predetermined stroke so as to execute a predetermined pump action.

Further, the reservoir 27 has a role as a temporary storage tank for releasing the hydraulic fluid L in order to quickly reduce the hydraulic pressure of the wheel cylinder 11 without waiting for the start of the pumping action of the hydraulic pump 29A for pressure reduction described above. doing.
The stroke simulator 63 is provided to alleviate the phenomenon that the operation becomes heavy when the brake lever 3 is operated when the above-described CBS (interlocking brake system) is activated and active pressure increase is being executed. This is a temporary storage chamber for the hydraulic fluid L for simulating the good operation feeling of the brake lever 3.

As the four types of valves 21, 23, 25, and 33, known two-position type solenoid valves can be applied as an example.
In addition, the upstream position and the downstream position of the switching valve 21, the upstream position and the downstream position of the fill valve 23, the upstream position of the release valve 25 on the wheel cylinder 11 side, and the release valve of the hydraulic pump 29A for pressure reduction. Filters 65 are provided at an upstream position on the 25th side, an upstream position on the master cylinder 5 side of the high pressure suction valve 33, and an upstream position on the stroke simulator 63 side of the hydraulic pressure pump 29B for pressure increase. A throttle 67 for adjusting the discharge amount of the hydraulic fluid L is provided at a downstream position of the two hydraulic pumps 29A and 29B.

  Further, a speed sensor 37 that detects a change in the speed of the front wheel 17 from the number of rotations of the front wheel 17 is provided in the vicinity of the front wheel 17. Based on the speed information of the front wheel 17 obtained by the speed sensor 37, the pressure information in the pipe line 19 obtained by the pressure sensor 35, and the operation amount of the brake lever 3, as shown in FIG. The unit (ECU) 39 performs brake fluid pressure control based on the normal mode, the ABS mode, or the boost mode, and opens and closes the four types of valves 21, 23, 25, and 33, and drives and stops the motor 31. Switching is performed at an appropriate timing.

(2) Housing conduit configuration and hydraulic circuit component arrangement (see FIGS. 3 and 4)
The brake hydraulic pressure control device 1 includes a pipe 19 that forms the flow path of the hydraulic fluid L described above in a single housing 13, and a plunger-type hydraulic pump for pressure reduction that is driven by a single motor 31. 29A and a hydraulic pump 29B for increasing pressure, and a switching valve 21, a fill valve 23, a loosening valve 25, and a high-pressure intake valve 33 that are used as appropriate when the hydraulic pressure of the hydraulic fluid L is reduced, increased and held. There are provided only one set of the four types of solenoid valves, the reservoir 27 used during pressure reduction, and the stroke simulator 63 used during pressure increase.
The housing 13 is a flat rectangular block-shaped member having a large area on the two opposing surfaces 49a and 49b and a small area on the remaining four surfaces 49c, 49d, 49e, and 49f. The housing 13 is formed of, for example, a metal material having a light weight and necessary rigidity such as aluminum.

Further, as shown in FIG. 3, a communication hole 51 for forming a flow path for the hydraulic fluid L is formed in the housing 13. The pipe 19 of the hydraulic circuit 15 described above is formed in the housing 13 by the communication hole 51.
And in this Embodiment, as shown in FIG.3 and FIG.4, four types of solenoid valves 21,23,25,33 are provided with respect to one surface 49a of 2 surfaces 49a, 49b of the housing 13 with the said large area. Arranged so that one end face faces. The reservoir 27 and the stroke simulator 63 are arranged so that one end face of the four faces 49c, 49d, 49e, 49f of the housing 13 having a small area faces the one face 49c.

Of the four surfaces 49c, 49d, 49e, 49f of the housing 13 having a small area, two pressure reducing fluid pumps 29A are provided on two opposing surfaces 49f and 49d that intersect the mounting direction H of the reservoir 27 and the stroke simulator 63. And one end face of the pressure-increasing hydraulic pump 29B face each other.
In addition, the switching valve 21 and the intake valve 23 are disposed on one side of the housing hole 53A for housing the pressure reducing hydraulic pump 29A and the housing hole 53B for housing the pressure increasing hydraulic pump 29B. On the other side, the high pressure suction valve 33 and the release valve 25 are arranged on straight lines B and C parallel to the plunger driving direction A of the pressure reducing hydraulic pump 29A and the pressure increasing hydraulic pressure pump 29B, respectively.

Further, in the present embodiment, as shown in FIGS. 3 and 4, the filling valve 23 and the release valve 25 are disposed at a position near the accommodation hole 53 </ b> A for accommodating the pressure reducing hydraulic pump 29 </ b> A, and the pressure increasing hydraulic pressure pump is provided. On the straight lines F and G intersecting the plunger driving direction A of the hydraulic pressure pump 29A for pressure reduction and the hydraulic pressure pump 29B for pressure increase, respectively, the switching valve 21 and the high pressure suction valve 33 are located near the accommodation hole 53B for accommodating 29B. Is arranged.
In addition, a reservoir 27 is disposed in the vicinity of the release valve 25, and a stroke simulator 63 is disposed in the vicinity of the high-pressure intake valve 33.

Further, in the present embodiment, as shown in FIGS. 3 and 4, the fluid pressure of the working fluid L flowing in the pipeline 19 is detected at the center of the four types of electromagnetic valves 21, 23, 25, 33. The pressure sensor 35 is disposed so that one end surface of the pressure sensor 35 faces the one surface 49a having the large area.
In addition, the housing 13 has an inflow port 55 for connecting to the connecting pipe line 7 extending from the master cylinder 5 described above, and an outflow port 57 for connecting to the connecting pipe line 8 extending from the wheel cylinder 11 described above. A storage chamber 59 for storing the reservoir 27, a storage chamber 60 for storing the stroke simulator 63, a screw hole 61 used when the housing 13 is attached, and the like are appropriately provided as shown in FIGS. ing.

(3) Flow of hydraulic fluid when each mode is executed (see FIGS. 5 to 7)
Next, the operation modes of the hydraulic circuit components of the brake hydraulic pressure control device 1 according to the present embodiment configured as described above are as follows: (A) Normal mode execution; (B) ABS mode execution; (C) The operation will be described in accordance with the flow of the hydraulic fluid L when the above modes are executed separately from when the pressure increase mode is executed.
(A) Normal mode execution (see Fig. 5)
At the normal time of executing the normal mode, the switching valve 21 and the filling valve 23 arranged in the pipe line 19a are in the open state. On the other hand, the relaxation valve 25 arranged in the pipe line 19b and the high-pressure suction valve 33 arranged in the pipe line 19c are in a closed state. Therefore, when the driver operates the brake lever 3, the hydraulic pressure of the hydraulic fluid L corresponding to the amount of operation is applied from the communication line 7 to the line 19a, and further communicates through the switching valve 21 and the intake valve 23. The braking force corresponding to the operation amount of the brake lever 3 is applied to the front wheel 17 by the brake 9 after reaching the wheel cylinder 11 via the pipe line 8.

(B) When ABS mode is executed (see FIG. 6)
When the speed sensor 37 confirms that the front wheel 17 is locked while traveling on a wet road surface or the like, the supply valve 23 is closed and the supply of the hydraulic fluid L from the master cylinder 5 is stopped. Further, the hydraulic pressure of the hydraulic fluid L applied to the wheel cylinder 11 flows from the branch point 47c to the pipe line 19b, and is temporarily stored in the reservoir 27 through the loosening valve 25 that shifts to the open state.
Thereafter, when the motor 31 is activated to operate the hydraulic pump 29A for decompression, the hydraulic fluid L in the wheel cylinder 11 and the hydraulic fluid L temporarily stored in the reservoir 27 are transferred to the hydraulic pump 29A for decompression. Then, it flows into the pipe line 19a again from the junction 47b, and reaches the master cylinder 5 from the communication pipe line 7 through the open switching valve 21.

When the hydraulic pressure of the hydraulic fluid L applied to the wheel cylinder 11 decreases, the front wheel 17 is unlocked and the front wheel 17 starts to rotate again. The speed sensor 37 measures the speed of the front wheel 17 again, and based on this, keeps the closing valve 23 and the release valve 25 closed to maintain the hydraulic pressure of the hydraulic fluid L applied to the wheel cylinder 11, The valve 23 is opened again, and the hydraulic pressure of the hydraulic fluid L from the master cylinder 5 is applied to the wheel cylinder 11 to increase the braking force applied to the front wheel 17 by the brake 9.
Thereafter, the same operation is repeated intermittently in units of several milliseconds, and the vehicle shifts to the running stop state while ensuring the stability of the posture of the vehicle body and the steering performance.

(C) When boosting mode is executed (see FIG. 7)
When it is determined that the braking force of the front wheel 17 in the normal mode based on the operation of the brake lever 3 is insufficient (when brake assist is necessary) or the interlocking brake system is activated, the braking force of the front and rear wheels is ideal When active pressure increase for distribution is performed, the high-pressure suction valve 33 that has been closed is switched to an open state, and the motor 31 is started to drive the pressure increase hydraulic pump 29B.
Thereby, the hydraulic fluid L supplied from the master cylinder 5 and flowing into the pipe line 19c from the branch point 47a flows into the pipe line 19a from the junction point 47b through the high-pressure suction valve 33.

Further, the hydraulic fluid L reaches the wheel cylinder 11 through the communication valve 8 through the open fill valve 23, and acts as a brake assist to compensate for the control force corresponding to the operation amount of the brake lever 3, The braking force due to active pressure increase is applied to the front wheels 17.
When the brake lever 3 is operated during active pressure increase, the switching valve 21 is closed to restrict the hydraulic fluid L flowing into the pipe line 19a directly from the communication pipe line 7, and from the pipe line 19c to the junction 47b. Thus, the hydraulic fluid L is supplied to the wheel cylinder 11 using only the flow path flowing into the pipe line 19a.

  Further, when the brake lever 3 is operated during the active pressure increase, the stroke simulator 63 described above shifts from the contracted state where the hydraulic fluid L is empty to the expanded state where the hydraulic fluid L can be stored. The lever 3 is configured to have a good operation feeling.

According to the brake hydraulic pressure control device 1 according to the present embodiment configured as described above, the housing 13 including only the one-channel hydraulic circuit 15 is used, thereby reducing the size and weight of the housing 13. Thus, the structure can be simplified, and the degree of freedom of arrangement of the housing 13 can be improved.
Also, by providing two hydraulic pumps 29A and 29B for pressure reduction and pressure increase, and arranging them in different flow paths with little overlap, the hydraulic circuit 15 capable of dealing with various modes can be made multifunctional. Further, the structure of the pipe line 19 and the hydraulic circuit 15 can be further simplified, and the brake hydraulic pressure control device 1 that can facilitate the brake control by reducing the hydraulic circuit components to be controlled can be provided. .

The above is the basic embodiment of the present invention, but the brake fluid pressure control device 1 of the present invention is not limited to the above-described embodiment, and is a part within the scope not departing from the gist of the present invention. It is possible to change or omit the general configuration, or add conventional techniques well known to those skilled in the art.
For example, the brake fluid pressure control device 1 having the above-described configuration can be applied to a brake fluid pressure control system for rear wheels. In this case, a brake pedal can be applied in place of the brake lever 3, and a function as a TCS (traction control system) for preventing the rear wheel from idling during start / acceleration is added to the hydraulic circuit 15. Is possible.

  Further, the arrangement of the pipeline 19b and the pipeline 19c described above is reversed, and the pipeline 19b serving as the flow path of the hydraulic fluid L when the ABS mode is executed is disposed on the left side of the pipeline 19a in FIG. It is also possible to arrange a pipe 19c that serves as a flow path for the hydraulic fluid L when the pressure increase mode is executed on the right side of the pipe 19a in FIG.

The arrangement of the switching valve 21 and the intake valve 23 and the arrangement of the relaxation valve 25 and the high pressure suction valve 33 described above are the plunger driving direction A of the pressure reducing hydraulic pump 29A and the pressure increasing hydraulic pressure pump 29B. In addition to setting on straight lines B and C that are completely parallel to each other, the housing 13 is slightly tilted within a range that does not reduce the size of the housing 13 and the pipe 19 is complicated, or is set at a position slightly shifted from the straight lines B and C Is possible.
Similarly, the arrangement of the intake valve 23 and the release valve 25 and the arrangement of the switching valve 21 and the high-pressure intake valve 33 are the plunger driving directions of the hydraulic pump 29A for pressure reduction and the hydraulic pump 29B for pressure increase. In addition to being set on the straight lines F and G orthogonal to A, the position is slightly inclined from the straight lines F and G within a range that does not cause downsizing of the housing 13 and complication of the pipe line 19. It is possible.

In addition, the arrangement of the switching valve 21 and the intake valve 23 described above and the arrangement of the above-described relaxation valve 25 and the high-pressure intake valve 33 are exchanged up and down in FIG. 4, and the release valve 25 and the high-pressure intake are arranged upward in FIG. It is possible to arrange the valve 33 and to arrange the switching valve 21 and the intake valve 23 below in FIG.
When such a valve arrangement is adopted, the arrangement of the reservoir 27 and the stroke simulator 63 and the arrangement of the inflow port 55 and the outflow port 57 are reversed, and the housing 13 is disposed on the upper surface 49e side in FIG. The reservoir 27 and the stroke simulator 63 are arranged, and the inlet 55 and the outlet 57 can be arranged on the lower surface 49c side of the housing 13 in FIG.

Similarly, the arrangement of the above-described filling valve 23 and the release valve 25 and the above-described arrangement of the switching valve 21 and the high-pressure absorption valve 33 are interchanged on the left and right in FIG. 4, and the switching valve 21 and the high-pressure on the left in FIG. It is also possible to arrange the absorption valve 33 and arrange the intake valve 23 and the release valve 25 on the right side in FIG.
Further, when such a valve arrangement is adopted, the arrangement of the pressure-reducing liquid pressure pump 29A and the pressure-increasing liquid pressure pump 29B is reversed, and the pressure-increasing liquid is placed on the left side 49f side in FIG. It is possible to arrange the pressure pump 29B and arrange the hydraulic pump 29A for pressure reduction on the right side 49d side in FIG.
Further, in this case, it is possible to arrange the reservoir 27 and the stroke simulator 63 on the left and right in FIG. 4 to arrange the stroke simulator 63 on the left and the reservoir 27 on the right. The arrangement of the inlet 55 and the outlet 57 can be interchanged between the left and right in FIG. 4, the inlet 55 can be arranged on the left, and the outlet 57 can be arranged on the right.

  In addition, the stroke simulator 63 provided on the pipe line 19c between the high pressure suction valve 33 and the pressure increasing hydraulic pump 29B in the above-described embodiment is replaced with a pipe line between the master cylinder 5 and the switching valve 21. The stroke simulator 63 can be omitted when the operation feeling of the brake lever 3 when the CBS (interlocking brake system) is operated can be improved by another configuration. is there.

  The brake fluid pressure control device of the present invention can be used in the production site of motorcycles and the fields of use thereof, and in particular, the housing is made smaller and lighter and the structure is simplified. If you want to expand the degree of freedom of arrangement of the brake fluid pressure control device, and adopt a balanced arrangement structure of the hydraulic circuit and hydraulic circuit parts with an organized layout, It has applicability when we want to simplify it.

DESCRIPTION OF SYMBOLS 1 Brake hydraulic pressure control device 3 Brake lever 5 Master cylinder 7 Connection pipe line 8 Connection pipe line 9 Brake 11 Wheel cylinder 13 Housing 15 Hydraulic circuit 17 Front wheel 19 Line 21 Switching valve 23 Receiving valve (inlet valve)
25 Relaxation valve (Outlet valve)
27 Reservoir (accumulator)
29A Hydraulic pump 29B (for pressure reduction) Hydraulic pump 31B (for pressure increase) 31 Motor 33 High pressure intake valve 35 Pressure sensor 37 Speed sensor 39 Electronic control unit (ECU)
43 Check valve
45 Check valve
47 Junction (confluence)
49 surface 51 communication hole 53 accommodation hole 55 inflow port 57 outflow port 59 accommodation chamber 60 accommodation chamber 61 screw hole 63 stroke simulator 65 filter 67 throttling L hydraulic fluid A plunger drive direction B straight line C straight line F straight line G straight line H installation direction

Claims (9)

A brake fluid pressure control device for controlling a brake pressure applied to a wheel,
The brake hydraulic pressure control device operates a brake by a master cylinder that generates hydraulic pressure of hydraulic fluid corresponding to an operation amount of a brake lever or a brake pedal , and hydraulic pressure of hydraulic fluid supplied through a communication pipe. Can be placed between the wheel cylinder,
The brake fluid pressure control device
With a single housing,
A single hydraulic circuit provided in the single housing,
The one hydraulic circuit is:
A hydraulic pump for depressurization capable of manually and / or automatically depressurizing the hydraulic fluid;
A pressure-increasing hydraulic pressure pump that is capable of manually and / or automatically increasing the pressure of the hydraulic fluid, and that is separate from the pressure-reducing pressure pump;
A brake hydraulic pressure control device having a hydraulic pump for pressure reduction and a single motor for driving the hydraulic pump for pressure increase. In the brake fluid pressure control device according to claim 1,
The one-system hydraulic circuit includes a hydraulic fluid passage for normal mode execution, a hydraulic fluid passage for ABS mode in which the pressure reduction hydraulic pump is disposed, and a pressure increase fluid. A brake fluid pressure control device provided with a hydraulic fluid flow path in a pressure increase mode execution in which a pressure pump is arranged. In the brake fluid pressure control device according to claim 1,
The pressure reducing hydraulic pump is a plunger type pump whose valve opening pressure is larger than atmospheric pressure, and the pressure increasing hydraulic pump is constituted by a suction type plunger type pump whose valve opening pressure is smaller than atmospheric pressure. Brake hydraulic pressure control device characterized by being. In the brake fluid pressure control device according to claim 1,
The one-system hydraulic circuit is a conduit that can be switched between a hydraulic fluid passage when executing the normal mode, a hydraulic fluid passage when performing the ABS mode, and a hydraulic fluid passage when executing the boost mode. When,
A switching valve disposed at an upstream position on the master cylinder side on the flow path of the hydraulic fluid when the normal mode is executed;
A dosing valve disposed at a downstream position on the wheel cylinder side on the flow path of the hydraulic fluid during execution of the normal mode,
A release valve arranged at an upstream position on the wheel cylinder side on the flow path of the hydraulic fluid when the ABS mode is executed;
A reservoir disposed at a downstream position of the relaxation valve on the flow path of the hydraulic fluid when the ABS mode is executed;
A hydraulic pump for decompression provided at a downstream position of the reservoir on the flow path of the hydraulic fluid when the ABS mode is executed;
A high-pressure intake valve disposed at an upstream position on the master cylinder side on the flow path of the hydraulic fluid during execution of the pressure increase mode;
A hydraulic pump for pressure increase provided at a downstream position of the high-pressure suction valve on the flow path of the hydraulic fluid when the pressure increase mode is executed;
A single motor that drives the hydraulic pump for pressure reduction and the hydraulic pump for pressure increase;
An electronic control unit for controlling the opening and closing of the four types of valves and the driving and stopping of the motor based on the amount of operation of the brake lever or the brake pedal and the pressure of the hydraulic fluid flowing in the pipe line and the change of the wheel speed; A brake fluid pressure control device comprising: A brake fluid pressure control device for controlling the brake pressure applied to the wheels, which is supplied via a connecting cylinder and a master cylinder that generates hydraulic fluid pressure corresponding to the amount of operation of the brake lever or brake pedal. The brake fluid pressure control device includes a single housing, and a flow of the hydraulic fluid is contained in the single housing. Appropriate for reducing, increasing and holding the hydraulic pressure of the hydraulic line for forming the passage, the hydraulic pump for pressure reduction and the hydraulic pump for pressure increase driven by a single motor There is only one set of four types of solenoid valves, switching valve, intake valve, release valve, and high-pressure suction valve, a reservoir used for pressure reduction, and a stroke simulator used for pressure increase. Brake fluid pressure control apparatus characterized by being. The brake hydraulic pressure control device according to claim 5, wherein the housing is a flat rectangular block-shaped member having a large area of two opposing surfaces and a small area of the remaining four surfaces, and the housing having a large area. The four types of solenoid valves are arranged so as to face one end face of one of the faces, and the one end face of the reservoir and the stroke simulator faces one face of the four faces of the small area housing. One end face of the pressure reducing hydraulic pressure pump and the pressure increasing pressure hydraulic pressure pump face the two opposing faces that intersect the mounting direction of the reservoir and the stroke simulator after the four faces of the housing having a small area. The brake fluid pressure control device is arranged as described above. 6. The brake hydraulic pressure control device according to claim 5, wherein the switching is performed on one side of a housing hole for housing the pressure reducing hydraulic pump and a housing hole for housing the pressure increasing hydraulic pump. The valve and the intake valve are arranged on the other side, and the high-pressure suction valve and the release valve are arranged on a straight line parallel to the plunger driving direction of the pressure reducing pressure pump and the pressure increasing pressure pump, respectively. Brake fluid pressure control device. The brake hydraulic pressure control device according to claim 5, wherein the storage valve and the loosening valve are located near the accommodation hole for accommodating the pressure reducing hydraulic pump, and the accommodation hole for accommodating the pressure increasing hydraulic pump. The switching valve and the high-pressure suction valve are arranged on a straight line that intersects the plunger driving direction of the pressure-reducing hydraulic pressure pump and the pressure-rising hydraulic pressure pump, respectively. The brake fluid pressure control apparatus according to claim 1, wherein the stroke simulator is disposed in the vicinity of the high-pressure intake valve. The brake fluid pressure control device according to claim 5, wherein a pressure sensor for detecting the fluid pressure of the hydraulic fluid flowing in the pipe line is disposed at the center of the four types of solenoid valves. A brake fluid pressure control device, wherein one end surface is provided so as to face one of two surfaces having a large area of the housing.

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