JP3726375B2 - Hydraulic control device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydraulic pressure control device that controls a predetermined operation using hydraulic pressure generated by pumping hydraulic fluid in a reservoir, for example, a hydraulic pressure booster that supplies brake fluid to a vehicle wheel brake. And the like.
[0002]
[Prior art]
In general, in a vehicle hydraulic pressure control device, the level of hydraulic fluid in a reservoir also tilts when the vehicle is tilted, braked, or turned. When the liquid level of the working fluid is inclined as described above, there is a possibility that the working fluid supply port portion is exposed to the atmosphere without flowing to the working fluid supply port portion of the reservoir.
[0003]
When the pump device is driven in a state where the hydraulic fluid supply port is exposed to the atmosphere, there is a possibility that air may be mixed into the hydraulic pressure device, for example, the hydraulic pressure booster.
[0004]
As a conventional vehicular hydraulic pressure control device that has been made to solve such problems, as disclosed in Japanese Utility Model Laid-Open No. 5-5643, a reservoir for storing hydraulic fluid, and a hydraulic fluid in the reservoir are disclosed. And a hydraulic pressure booster that is arranged on the lower side of the reservoir and boosts the input to a predetermined size by the hydraulic pressure from the pump and outputs the boosted pressure. In the hydraulic control apparatus for a vehicle, the reservoir protrudes toward the hydraulic booster at a lower side thereof and the hydraulic fluid supply port portion is filled with the hydraulic fluid even when the vehicle is tilted And a joint provided at a lower portion of the hydraulic fluid supply port, and a connection member connected to the joint and the pump to enable communication between the hydraulic fluid supply port and the pump. Hydraulic control for vehicles Apparatus is known.
[0005]
According to this conventional vehicle hydraulic pressure control device, even when the vehicle is tilted and the liquid level of the reservoir is tilted as the vehicle is tilted, the hydraulic fluid is always present in the hydraulic fluid supply port and the joint portion. become.
[0006]
Therefore, there is no possibility that the pump sucks air and mixes it into the hydraulic pressure booster.
[0007]
[Problem to be Solved by the Invention]
However, in such a conventional vehicle hydraulic pressure control device, since the hydraulic fluid supply port projects from the lower side of the reservoir toward the hydraulic pressure booster, the reservoir and the hydraulic booster A space is secured between the hydraulic fluid supply port, the joint, and the connection member.
[0008]
Therefore, the vehicle hydraulic pressure control device is increased in size by the arrangement space of the hydraulic fluid supply port.
[0009]
Generally, the vehicle hydraulic pressure control device is disposed in an engine room of a vehicle where space is severely limited, and it is not desirable to increase the size of the vehicle hydraulic pressure control device.
An object of the present invention is to provide a compact vehicle hydraulic pressure control device.
[0010]
[Means for Solving the Problems]
In order to solve the above technical problem, a reservoir for storing hydraulic fluid, a pump for sucking hydraulic fluid in the reservoir to generate hydraulic pressure, a liquid disposed from a lower side of the reservoir, In the vehicle hydraulic pressure control device including a hydraulic pressure operating device that operates by receiving pressure, the reservoir projects toward the hydraulic pressure booster on a lower side thereof, and the hydraulic fluid in the reservoir Even when the surface is inclined, a hydraulic fluid supply port portion filled with the hydraulic fluid is provided, and the hydraulic pressure operating device can accommodate the hydraulic fluid supply port portion formed in the main body portion. A recess, and a communication passage having one end disposed in the housing recess and capable of communicating hydraulic fluid from the hydraulic fluid supply port, and connected to the other end of the communication passage and the pump. Connection part enabling communication between passage and pump To constitute a vehicle hydraulic pressure control apparatus characterized by comprising a.
[0011]
Preferably, the hydraulic pressure actuating device is a vehicular brake hydraulic pressure control device that is a hydraulic pressure booster that boosts an input to a predetermined magnitude by the hydraulic pressure from the pump and outputs the boosted pressure.
[0012]
In the vehicle hydraulic pressure control device according to the first aspect, the hydraulic fluid supply port portion of the reservoir is assembled in the housing recess of the hydraulic pressure operation device, so that the hydraulic fluid supply port portion and one end portion of the communication path are connected. The reservoir and the communication path are communicated.
[0013]
The communication path and the pump are communicated with each other by connecting the pump and the other end of the communication path with a connecting member.
[0014]
Therefore, the reservoir and the pump communicate with each other via the communication path and the connection path provided in the hydraulic pressure operating device.
[0015]
In addition to the operation of the first aspect, the vehicle control device according to the second aspect is configured such that the hydraulic fluid supply port portion of the reservoir is assembled to the housing recess of the hydraulic pressure booster, thereby connecting the hydraulic fluid supply port portion and the communication path. Are connected to each other so that the reservoir communicates with the communication path.
[0016]
The communication path and the pump are communicated with each other by connecting the pump and the other end of the communication path with a connecting member.
[0017]
Therefore, the reservoir and the pump communicate with each other through the communication path and the connection path provided inside the hydraulic pressure booster.
[0018]
Embodiment
Hereinafter, the present invention will be specifically described with reference to embodiments.
[0019]
1 is a front view of a vehicular brake hydraulic pressure device according to the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view taken along line AA of FIG. FIG. 2 is a side view of the reservoir of FIG. 1. As shown in FIGS. 1 to 4, reference numeral 1 denotes a vehicular brake hydraulic pressure device which is one of vehicular hydraulic pressure control devices. The vehicular brake hydraulic pressure device 1 sucks in brake fluid in a reservoir 2 for storing brake fluid and the reservoir 2. A pump 3 that generates hydraulic pressure, an accumulator 4 that stores the hydraulic pressure generated by the pump 3, and a lower side of the reservoir 2, and the input is set to a predetermined magnitude by the hydraulic pressure from the pump 3 and the accumulator 4. And a hydraulic pressure booster 5 for boosting and outputting.
[0020]
The reservoir 2 has a hydraulic fluid supply port portion 2a having a hydraulic fluid supply port 2b at the lower portion thereof. The hydraulic fluid supply port 2a is formed so as to protrude on the lower side, that is, on the hydraulic booster 5 side.
[0021]
The body main body 51 of the hydraulic booster 5 is formed with an accommodation recess 52 capable of accommodating the hydraulic fluid supply port 2a.
[0022]
Furthermore, a communication passage 53 that can accommodate the hydraulic fluid supply port 2 b is formed in the body main body 51.
[0023]
One end portion 53a of the communication path 53 is disposed at the bottom of the housing recess 52, and the other end portion 53b is disposed on the left side of the body main body 51 in FIG.
[0024]
By assembling the hydraulic fluid supply port 2a of the reservoir 2 to the accommodating recess 52 of the hydraulic pressure booster 5, the hydraulic fluid supply port 2b and the one end 53a of the communication path 53 are connected to communicate with the reservoir 2. The passage 53 communicates with the passage 53.
[0025]
The communication path 53 and the pump 3 are communicated with each other by connecting the pump 3 and the other end portion 53 b of the communication path 53 by the pipe 6 that is a connection member.
[0026]
Therefore, the reservoir 2 and the pump 3 communicate with each other through the communication path 53 and the pipe 6 provided in the hydraulic pressure booster 5.
[0027]
The working fluid is introduced into the reservoir 2 from the opening 2 c provided in the upper portion of the reservoir 2, and the working fluid is stored in the reservoir 2.
[0028]
When a predetermined fluid pressure is not stored in the accumulator 4, the pump 3 is driven, and the hydraulic fluid stored in the reservoir 2 is supplied to the hydraulic fluid supply port 2a, the hydraulic fluid supply port 2b, the communication passage 53, and It is sucked into the pump 3 through the pipe 6.
[0029]
The hydraulic fluid sucked by the pump 3 is further fed to the accumulator 4, and the hydraulic pressure is stored in the accumulator 4.
[0030]
When the hydraulic pressure of the accumulator 4 reaches a predetermined hydraulic pressure, the supply of the hydraulic fluid of the pump 3 is stopped, and the accumulator 4 is held in a state where the predetermined hydraulic pressure is stored.
[0031]
In the hydraulic booster 5, when a brake operation member (not shown) such as a brake pedal is depressed, a control valve (not shown) in the hydraulic booster 5 is switched, and the hydraulic pressure of the accumulator 4 is changed to the hydraulic booster. It acts on a power piston (not shown) in the device 5.
[0032]
By receiving the hydraulic pressure from the accumulator 4, the power piston is actuated, and by the actuation of this power piston, the input is boosted and outputted, and the master cylinder (not shown) is actuated by this output to generate the brake hydraulic pressure. The brake of the wheel is actuated by the brake fluid pressure.
[0033]
For example, when the vehicle is braked, the liquid level of the hydraulic fluid in the reservoir 2 is inclined due to the inertia of the hydraulic fluid. Moreover, the stronger the brake, the greater the inclination of the hydraulic fluid level.
[0034]
However, the hydraulic fluid in the reservoir 2 is always filled with the hydraulic fluid in the hydraulic fluid supply port 2a and the hydraulic fluid supply port 2b so that the hydraulic fluid is always filled in the hydraulic fluid even when the liquid level of the hydraulic fluid is inclined during strong braking. Since the supply port 2a is disposed, the hydraulic fluid supply port 2a and the hydraulic fluid supply port 2b are not exposed to the atmosphere in the reservoir 2.
[0035]
Therefore, the pump 3 does not inhale the air in the reservoir 2. As a result, the pump 3 does not supply the hydraulic fluid to the accumulator 4 just by discharging the air by inhaling the air. There is no risk that it will not be stored. Further, even if air is mixed in the discharge side passage of the pump 3, the air in the passage is only compressed, and the hydraulic pressure is not efficiently stored in the accumulator 4. Therefore, the driving loss of the pump 3 is lost. There is no fear that this energy will be consumed in vain.
[0036]
As described above, according to the vehicle hydraulic pressure control device of the present invention, the pump 3 sucks air even when the level of the hydraulic fluid in the reservoir 2 is tilted when the vehicle is braked or when the vehicle is tilted. Needless to say, the reservoir 2 has a hydraulic fluid supply port 2a including a hydraulic fluid supply port 2b on the lower side, and the hydraulic booster 5 houses the hydraulic fluid supply port 2a. By providing the storage recess 52, the hydraulic fluid supply port 2b, and hence the hydraulic fluid supply port 2a, and the communication passage 53 that connects the pipe 6 extending to the pump 3, the lower side of the reservoir 2 and the hydraulic booster are provided. Therefore, it is not necessary to provide an extra space between the upper portion of the vehicle 5 and the vehicle brake hydraulic device 1 can be downsized in the vertical direction. Therefore, it is possible to effectively use the space in the engine room of a vehicle in which space restrictions are severe.
[0037]
Furthermore, by forming the other end portion 53b of the communication passage 53 in a direction where there is a space when the vehicle is mounted, it is possible to ensure the space for arranging the pipe 6 more reliably. Therefore, the space in the engine room of the vehicle with more severe space restrictions can be used more effectively.
[0038]
In addition, since the hydraulic fluid supply port 2b and the one end portion 53a of the communication passage 53 are connected, the number of support points between the reservoir 2 and the hydraulic booster 5 increases, and the stability of the reservoir 2 is improved. Will increase.
[0039]
Therefore, it is possible to provide a compact brake hydraulic device 1 for a vehicle.
As mentioned above, although this invention was demonstrated according to the said embodiment, this invention is not limited only to the said aspect, The various aspect according to the principle of this invention is included.
[0040]
【The invention's effect】
As described above, according to the first aspect of the present invention, for example, even when the level of the hydraulic fluid in the reservoir is tilted when the vehicle is braked or when the vehicle is tilted, there is no possibility that the pump sucks air. Needless to say, the reservoir has a hydraulic fluid supply port on the lower side thereof, and the hydraulic actuator has a storage recess for accommodating the hydraulic fluid supply port, and a connection extending to the hydraulic fluid supply port and the pump. By providing a communication passage that communicates with the member, there is no need to provide an extra space between the lower side of the reservoir and the upper side of the hydraulic pressure operating device, and the vehicle hydraulic pressure control device is downsized in the vertical direction. It is possible to plan. Therefore, it is possible to effectively use the space in the engine room of a vehicle in which space restrictions are severe.
[0041]
Furthermore, by forming the other end portion of the communication path in a direction where there is a space when the vehicle is mounted, it is possible to more reliably secure the space for arranging the connection member. Therefore, the space in the engine room of the vehicle with more severe space restrictions can be used more effectively.
[0042]
Therefore, it is possible to provide a compact vehicle hydraulic pressure control device.
[0043]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, a better form of the vehicle hydraulic pressure control apparatus using the hydraulic booster is shown.
[Brief description of the drawings]
FIG. 1 is a front view of a vehicular braking hydraulic apparatus 1 according to an embodiment.
FIG. 2 is a side view of FIG.
3 is a cross-sectional view taken along line AA in FIG.
4 is a side view of the reservoir 2 of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle brake hydraulic pressure apparatus 2 Reservoir 2a Hydraulic fluid supply part 3 Pump 5 Hydraulic pressure booster 51 Body main body part 52 Storage recessed part 53 Communication path 53a One end part 53b The other end part 6 Pipe

Claims (2)

A reservoir that stores hydraulic fluid, a pump that draws hydraulic fluid in the reservoir to generate hydraulic pressure, and a hydraulic actuator that is disposed on the lower side of the reservoir and that operates by receiving hydraulic pressure from the pump In the vehicle hydraulic pressure control apparatus, the reservoir protrudes toward the hydraulic pressure operating device at a lower side thereof and operates even when the liquid level of the hydraulic fluid in the reservoir is inclined. A hydraulic fluid supply port portion that is filled with a liquid, and the hydraulic pressure operating device is formed in a main body portion of the hydraulic fluid operation device. And a communication path through which the hydraulic fluid from the hydraulic fluid supply port can communicate, and is connected to the other end of the communication path and the pump so that the communication path and the pump can communicate with each other For vehicles characterized by having members Pressure control device. 2. The vehicle hydraulic pressure control device according to claim 1, wherein the hydraulic pressure operating device is a hydraulic pressure boosting device that boosts an input to a predetermined magnitude by a hydraulic pressure from the pump and outputs the boosted pressure.

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