JP2007112412A - Electronic control type power steering device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic control type power steering device provided with a pressure control valve capable of feeling variation of steering feeling according to variation of a vehicle speed to a driver. <P>SOLUTION: The pressure control valve includes a first valve 710 and a second valve 720, the first valve includes a first valve body 701 of a hollow shape formed with a discharge port 223 and a feeding port 221 on an outer peripheral side; a first spool 703 provided with a first flow passage 707 communicated with the feeding port and opened at a lower side on an inner side and slidably provided on an inner side of the first valve body; and a first elastic member 705 provided on an upper side of the first spool, and the second valve includes a second valve body 711 of a hollow shape formed with a radial port 224 on an outer peripheral side; a second spool 713 provided with a second flow passage 717 communicated with the radial port and opened at one side on an inner side and slidably provided on an inner side of the second valve body; a second elastic member 715 provided on one side of the second spool; and a solenoid provided on the other side of the second spool. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronically controlled power steering apparatus for a vehicle, and more particularly, to an electronic control of a vehicle provided with a pressure control valve capable of making a driver feel a change in steering feeling according to a change in vehicle speed. The present invention relates to a power steering apparatus.

  In general, a steering device for a vehicle is a device for changing the traveling direction of the vehicle according to the driver's will, and a direction desired by the driver by arbitrarily changing the rotation center at which the front wheel of the vehicle turns. It is an apparatus for changing the traveling direction of the vehicle.

  On the other hand, when a driver operates a steering wheel of a vehicle, the power steering device uses a reaction force device to assist the driver's operating force of the steering wheel. It is a device that can change the direction.

Such a power steering device is a hydraulic power steering device (HPS:
Hydraulic Power Steering Apparatus) and EPS (Electric Power Steering Apparatus).

  In a hydraulic power steering system, a hydraulic pump connected to the rotating shaft of an engine supplies hydraulic oil to an operating cylinder connected to a rack bar, and a piston of the operating cylinder supplied with the operating oil operates to operate force. Is a device that enables the driver to steer with a small force. On the other hand, the electric power steering device includes a motor and an electronic control unit (ECU) instead of the hydraulic pump and the working cylinder, and assists the operating force with the power of the motor.

  Recently, an increasing number of vehicles are equipped with electric power steering devices, but most vehicles still use hydraulic power steering devices.

  When the vehicle is running or stopped at low speed, a large steering assist power is required because the road surface friction of the tire is large. On the other hand, when the vehicle is traveling at a high speed, a large steering assist power is required because the road surface friction of the tire is small. Is not required. However, in a general hydraulic power steering system, the same steering assist power is supplied regardless of whether the vehicle is traveling at low speed or high speed. There is a problem that the safety at the time of steering decreases due to the light operation of the wheel.

  In order to solve such a problem, recently, an electronic control system has been developed that can control the supply of steering assist power in accordance with the traveling speed of the vehicle, thereby ensuring safety during steering even at high speeds. An electronically controlled power steering apparatus (ECPS) has been introduced.

  FIG. 1 is a block diagram of an electronically controlled power steering apparatus for a vehicle according to the prior art, and FIGS. 2a and 2b respectively show one side face, the other side face and a pressure control valve ( It is sectional drawing which shows one side of PCV: Pressure Control Valve.

  As shown in FIGS. 1 to 2 b, the electronically controlled power steering apparatus for a vehicle according to the prior art includes a hydraulic pump 101 driven by a vehicle engine (not shown). In addition, a hollow input shaft 203 in which the torsion bar 201 is incorporated, a pinion shaft 205 connected to the input shaft 203 via the torsion bar 201, and a reaction that approaches or separates from the input shaft 203 by hydraulic pressure. It has a hydraulic reaction force part 209 that regulates the relative displacement between the input shaft 203 and the pinion shaft 205 through a force plunger (Plunger) 207, and switches the flow path of the hydraulic oil by the relative displacement between the input shaft 203 and the pinion shaft 205. And a flow path switching valve 103. Furthermore, an operating cylinder 105 that supplies steering assist power by hydraulic oil transmitted from the flow path switching valve 103, a vehicle speed sensor 107 that senses the speed of the vehicle, and an electronic control that transmits electrical signals from the vehicle speed sensor 107. A device 109 and a pressure control valve 111 provided on one side of the flow path switching valve 103 and controlling the supply of hydraulic oil to the hydraulic reaction force portion 209 by the electronic control device 109 are included.

  The pressure control valve 111 includes a hollow valve body 211 having a supply port 221, a discharge port 223, and a reaction force port 224 on its outer peripheral side, and a downward elastic force applied to the spool 215 inside the valve body 211. And a spring 213 for acting. The upper spring 213 and the lower solenoid 217 are slidably supported inside the valve body 211 and formed on the outer peripheral surface at a predetermined depth and spaced apart from each other. And a spool 215 having a first step portion 225 and a second step portion 227 communicated with each other. In addition, it includes a solenoid 217 that supports the spool 215 on its lower side and is controlled by the electronic control unit 109.

  In the electronically controlled power steering apparatus having such a configuration, when the driver operates the steering wheel 113, the steering shaft 115 connected to the steering wheel 113 rotates and the steering is performed via the universal joint 117. An input shaft 203 connected to the shaft 115 rotates while being displaced relative to the pinion shaft 205. As a result, hydraulic oil is selectively supplied to the left and right pressure chambers 105 a and 105 b of the operating cylinder 105, and steering assist power is supplied to the rack bar 119. The basic operating principle is the same as that of a general hydraulic power steering apparatus.

  However, the electronically controlled power steering apparatus is different in that the operating state changes according to the speed of the vehicle, and will be described in detail below with reference to FIGS. 3 and 4.

  FIG. 3 is a cross-sectional view showing an operating state of a pressure control valve according to the prior art when the vehicle is traveling at a low speed, and FIG. 4 is a pressure diagram according to the prior art when the vehicle is traveling at a high speed. It is sectional drawing which shows the operating state of a control valve.

  When the vehicle is running or stopped at a low speed, the electronic control device 109 receives the vehicle speed signal sensed by the vehicle speed sensor 107 and controls the solenoid 217 of the pressure control valve 111 to slide the spool 215 upward. . As a result, the first step portion 225 moves upward and does not communicate with the supply port 221, so that the hydraulic oil is not transmitted to the flow path hole 229. Accordingly, the hydraulic oil is not supplied to the hydraulic reaction force portion 209, and the reaction force plunger 207 is separated from the input shaft 203, so that the input shaft 203 rotates without friction with the reaction force plunger 207. That is, in this case, since the operation of the steering wheel 113 becomes lighter, the driver gets a steering feeling similar to that when a general hydraulic power steering apparatus is operated.

  On the other hand, when the vehicle is traveling at a medium to high speed, the electronic control device 109 receives the vehicle speed signal sensed by the vehicle speed sensor 107 and controls the pressure control valve 111 to slide the spool 215 downward. As a result, the first step 225 moves downward and communicates with the supply port 221, so that the hydraulic oil is transmitted to the flow path hole 229. The hydraulic oil that has passed through the flow path hole 229 is supplied to the hydraulic reaction force portion via the second step portion 227 and the reaction force port 224. Accordingly, the hydraulic oil is supplied to the hydraulic reaction force portion 209, and the reaction force plunger 207 comes into close contact with the input shaft 203 due to the pressure of the hydraulic oil, so that the rotation of the input shaft 203 is restricted by the reaction force plunger 207. . That is, in this case, since the operation of the steering wheel 113 becomes heavy, the driver can obtain a stable steering feeling even when traveling at a high speed, unlike when a general hydraulic power steering apparatus is operated.

  FIG. 5 is a graph showing the relationship between the input torque during operation of the pressure control valve according to the prior art and the pressure of hydraulic oil supplied from the hydraulic pump, and FIG. 6 shows the relationship between the hydraulic oil supplied from the hydraulic pump. It is a graph which shows the relationship between a pressure (supply pressure) and the pressure (reaction force pressure) of the hydraulic fluid which acts on a hydraulic reaction force part.

  As shown in FIGS. 5 and 6, in the electronically controlled power steering apparatus according to the prior art, the reaction force pressure increases as the vehicle speed increases, and in particular, the rate of increase of the reaction force pressure as the vehicle speed increases is constant. It becomes.

  Therefore, since the rate of increase in reaction force pressure with changes in vehicle speed is constant, the driver cannot feel the change in steering feeling even when the vehicle speed changes, and the current driving state cannot be accurately felt. was there.

  Therefore, the present invention has been made in view of the above problems, and its object is to provide a novel and controllable pressure control valve that can make a driver feel a change in steering feeling according to a change in vehicle speed. It is an object of the present invention to provide an improved electronically controlled power steering apparatus for vehicles.

  In order to solve the above-described problems, according to one aspect of the present invention, a hydraulic reaction force portion that restricts relative displacement between an input shaft and a pinion shaft, and a pressure control valve that controls supply of hydraulic oil to the hydraulic reaction force portion An electronically controlled power steering apparatus for a vehicle including: a pressure control valve including a first valve and a second valve, the first valve having a hollow shape in which a discharge port and a supply port are formed on an outer peripheral side A first spool body, a first spool that is communicated with the supply port and that is open on the lower side and that is slidable inside the first valve body; The second valve includes a hollow second valve body having a radial port formed on the outer peripheral side, a second flow body that communicates with the radial port and opens on one side. The road is on the inside and the second valve A second spool that is slidable inside the main body, a second elastic member that is provided on one side of the second spool, and a solenoid that is provided on the other side of the second spool. An electronically controlled power steering device is provided.

  The first valve and the second valve may be built in close proximity to each other inside the hollow valve housing, and the valve housing may be provided with a restraining protrusion between the first valve and the second valve.

  A plug may be provided on the upper side of the first elastic member. Further, the plug may be press-fitted into the first valve body and coupled. The plug may be screwed to the first valve body. Moreover, you may make it provide the support body which touches each of the lower side of the said plug, and each upper side of a 1st elastic member.

  A hollow cap communicating with the first flow path may be provided below the first spool. Further, a hollow cap connected to the second flow path may be provided on one side of the second elastic member. Further, an orifice may be provided inside the cap.

  A filter may be provided at the inlet of the supply port. Further, a groove may be formed with a predetermined depth from the outer peripheral surface of the first valve body to the inside of the supply port.

  The first valve and the second valve may be provided in parallel to each other in the axial direction. Further, the first valve and the second valve may be provided on the same axis. The second valve may be provided in a direction perpendicular to the axial direction of the first valve. The second valve may be provided on the lower side of the first valve.

  As described above, according to the present invention, there is provided an electronically controlled power steering device for a vehicle including a pressure control valve that can make a driver feel a change in steering feeling according to a change in vehicle speed. Provided.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, the invention specifying items having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 7 is a sectional view showing the pressure control valve according to the first embodiment of the present invention.

  As shown in FIG. 7, the pressure control valve according to the first embodiment of the present invention includes a hollow first valve body 701 in which a discharge port 223 and a supply port 221 are formed on the outer peripheral side, and a reaction valve on the outer peripheral side. A hollow second valve body 711 having a force (radial) port 224 formed therein, and both are housed in a valve housing 730. The first valve body 701 is slidably provided on the inner side of the first valve body 701, communicated with the supply port 221, and provided with a first flow path 707 opened on the lower side. And a first valve 710 having a first elastic member 705 provided on the upper side of the first spool 703. Further, the second valve body 711 is provided so as to be slidable on the inner side thereof, communicated with the reaction force (radial) port 224, and provided with a second flow path 717 opened on the upper side. A second valve 720 having a spool 713, a second elastic member 715 provided on the upper side of the second spool 713, and a solenoid 217 provided on the lower side of the second spool 713 is included.

  The first valve 710 includes a first valve body 701, a first spool 703, and a first elastic member 705.

  The first valve body 701 has a substantially constant diameter and a cylindrical shape, and includes a supply port 221 and a discharge port 223 on the outer peripheral side. The supply port 221 is a passage through which hydraulic oil transmitted from the hydraulic pump is supplied, and the discharge port 223 is a passage through which hydraulic oil transmitted to the oil tank is discharged.

  FIG. 8 is a partial cross-sectional view showing the first valve according to the first embodiment of the present invention.

  As shown in FIG. 8, a filter 801 may be provided at the inlet of the supply port 221 in order to filter out foreign substances that flow into the first valve 710 together with the hydraulic oil.

  On the other hand, in order to prevent the supply port 221 from being blocked by the filter 801, the blocking prevention groove 803 may be formed at a predetermined depth from the outer peripheral surface of the first valve body 701 to the inside of the supply port 221. .

  The filter 801 and the blocking prevention groove 803 may be formed in the circumferential direction along the outer peripheral surface of the first valve body 701.

  The first spool 703 has a cylindrical shape, is slidably provided inside the first valve main body 701, and a first flow path 707 communicating with the supply port 221 is formed inside the first spool 703.

  Further, the first flow path 707 is opened below the first spool 703, and the hydraulic oil supplied through the supply port 221 is provided below the first spool 703 via the first flow path 707. Supplyed to the second valve 720. There are various ways in which the first valve 710 and the second valve 720 communicate with each other via the first flow path 707, but the first flow path 707 connects the first valve 710 and the second valve 720 in series with each other. It may be.

  The first elastic member 705 is provided between the upper side of the first spool 703 and the inner upper portion of the first valve body 701, and applies a downward elastic force (F) in the axial direction to the first spool 703. Here, the product (P × A) of the pressure (P) of the hydraulic oil acting on the lower side of the first spool 703 and the cross-sectional area (A) of the first spool 703 is the elastic force (F) of the first elastic member 705. ) Is larger, the first spool 703 is moved upward in the axial direction, and vice versa. Accordingly, the first spool 703 reciprocates in the axial direction in accordance with the pressure of the hydraulic oil, and the first flow path 707 is communicated with or not communicated with the supply port 221, thereby controlling the flow of the hydraulic oil.

  The hydraulic oil supplied to the lower side of the first spool 703 is supplied to the hydraulic reaction force part 209 via the second valve 720 to control the rotation of the input shaft 203. As described above, the first valve 710 The pressure of the hydraulic oil is controlled by the operation of.

  That is, by setting the elastic force of the first elastic member 705 to a constant value, the maximum pressure of the hydraulic oil that acts on the lower side of the first spool 703 can be controlled.

  The first elastic member 705 may be a spring having a certain elastic force, but is not limited thereto.

  In addition, a support body 721 that supports the first elastic member 705 is provided on the upper side of the first elastic member 705, and an adjustment plug 723 that is screw-coupled to the first valve body 701 is provided on the upper side of the support body 721. The elastic force of the first elastic member 705 can be adjusted by adjusting 723 and moving the support 721 up and down.

  On the other hand, a fixed plug that is press-fitted into the first valve body 701 may be provided above the first elastic member 705 instead of the adjustment plug 723.

  Of course, with the fixed plug, only the elastic force of the first elastic member 705 is maintained at a constant value so as to maintain the press-fitted state in the first valve body 701, and the elastic force cannot be adjusted.

  However, when the fixed plug is used, there is an advantage that the production time can be shortened in the mass production process of the pressure control valve according to the present invention as compared with the case where the adjustment plug 723 is screwed to the first valve body 701.

  On the other hand, a hollow cap 709 that communicates with the first flow path 707 is provided below the first spool 703 so that the first spool 703 can move inside the first valve body 701 by the elastic force of the first elastic member 705. Can be prevented from jumping out.

  The cap 709 can be press-fitted inside the first valve main body 701 and is screw-coupled by a male screw and a female screw respectively provided on the outer peripheral surface of the cap 709 and the inner peripheral surface of the first valve main body 701. You may do it.

  On the other hand, when the hydraulic oil transmitted from the hydraulic pump is accompanied by pulsation, an orifice may be provided inside the cap 709 to attenuate the pulsation.

  The first valve 710 and the second valve 720 are built in the valve housing 730. The first valve 710 and the second valve 720 are disposed below the second valve 710 and the second valve 710 so that the first spool 703 and the second spool 713 do not collide with each other in the sliding process. Between the upper side of the valve 720, the inner peripheral surface of the valve housing 730 may be provided with a restraining protrusion 731 that protrudes from the inner peripheral surface of the valve housing 730 with a predetermined width in the diameter direction.

  The second valve 720 is provided coaxially with the first valve 710 and includes a second valve body 711, a second spool 713, a second elastic member 715, and a solenoid 217.

  The second valve body 711 has a substantially constant diameter and a cylindrical shape, and a reaction force port 224 is formed on the outer peripheral side. The reaction force port 224 is a passage through which hydraulic oil transmitted from the hydraulic pump is supplied to the hydraulic reaction force portion 209.

  The second spool 713 has a cylindrical shape, is slidably provided inside the second valve main body 711, and a second flow path 717 communicating with the reaction force port 224 is formed inside the second spool 713. The second flow path 717 opens to the upper side of the second spool 713, and the hydraulic oil supplied through the first valve 710 is transmitted to the hydraulic reaction force portion 209 via the second flow path 717 and the reaction force port 224. The

  The second elastic member 715 is provided between the inner upper part of the second valve body 711 and the upper side of the second spool 713, and applies a downward elastic force to the second spool 713 in the axial direction. The second elastic member 715 may be a spring, but is not limited thereto.

  Further, a hollow cap 709 communicating with the second flow path 717 is provided between the upper side of the second elastic member 715 and the inner upper portion of the second valve body 711, so that an operation of a solenoid 217 described later can be performed. You may make it support the 2nd elastic member 715 so that the 2nd elastic member 715 may not jump out from the inner side of the 2nd valve main body 711 in the process in which the 2nd spool 713 slides to the upper side of an axial direction. The cap 709 can be press-fitted inside the second valve main body 711, and is screwed by a male screw and a female screw respectively provided on the outer peripheral surface of the cap 709 and the inner peripheral surface of the second valve main body 711. You can also.

  The solenoid 217 is provided coaxially with the second spool 713 below the second spool 713. The solenoid 217 is actuated by the electronic control device when the vehicle speed signal of the vehicle speed sensor is transmitted to the electronic control device.

  That is, when the vehicle is traveling at a low speed, the solenoid 217 moves the second spool 713 upward in the axial direction to reduce the supply of hydraulic oil to the hydraulic reaction force portion 209, thereby operating the steering wheel. When the vehicle is light and the vehicle is traveling at high speed, the second spool 713 is moved downward in the axial direction to increase the supply of hydraulic oil to the hydraulic reaction force portion 209, thereby increasing the operation of the steering wheel. To ensure safety during steering.

  FIG. 9 is a graph showing the relationship between the input torque and the pressure of hydraulic oil supplied from the hydraulic pump when the pressure control valve according to the first embodiment of the present invention is in operation. FIG. It is a graph which shows the relationship between the pressure (supply pressure) of the hydraulic fluid supplied, and the pressure (reaction force pressure) of the hydraulic fluid which acts on a hydraulic reaction force part.

  As shown in FIG. 9 and FIG. 10, when the pressure control valve according to the first embodiment of the present invention is operated, it is the same as the prior art in that the reaction force pressure increases as the vehicle speed increases. The increase ratio of the reaction force pressure changes as the vehicle speed increases. Therefore, since the increase ratio of the reaction force pressure with the change in the vehicle speed changes, the driver can notice the change in the steering feeling remarkably, and the current running state can be accurately felt by the change in the steering feeling.

  FIG. 11 is a sectional view showing a pressure control valve according to the second embodiment of the present invention.

  As shown in FIG. 11, the pressure control valve according to the second embodiment of the present invention includes a hollow first valve body 701 having a discharge port 223 and a supply port 221 formed on the outer peripheral side, and a first valve body. And a hollow second valve body 711 formed in a direction perpendicular to the axial direction of 701 and having a connection (radial) port 1101 formed on the outer peripheral side, both of which are built in the valve housing 730. The first valve body 701 is slidably provided on the inner side of the first valve body 701, communicated with the supply port 221, and provided with a first flow path 707 opened on the lower side. And a first valve 710 having a first elastic member 705 provided on the upper side of the first spool 703. Further, the second valve body 711 is slidably provided on the inner side of the second valve body 711, communicated with the connection (radial) port 1101, and opened on the hydraulic reaction force portion (not shown) side. It includes a second valve 720 having a second spool 713 having a passage 717 on the inside, a second elastic member 715 provided on one side of the second spool 713, and a solenoid 217 provided on the other side of the second spool 713. .

  The second valve 720 is provided in a direction perpendicular to the axial direction of the first valve 710, but a connection port 1101 is formed on the outer peripheral side of the second valve body 711, and hydraulic oil supplied from the first valve 710 is supplied to the second valve 720. It is transmitted to the inside of the second valve 720 through the connection port 1101.

  In the pressure control valve according to the second embodiment of the present invention having such a configuration, unlike the first embodiment, the second valve 720 is formed in a direction perpendicular to the axial direction of the first valve 710, so that the space If you are subject to general constraints, you can overcome it.

  Since other configurations and operations are the same as those of the first embodiment of the present invention, the same reference numerals are given to the same components, and detailed descriptions and descriptions of the operations are omitted.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, this invention is not limited to the example which concerns. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

It is a block diagram which shows the electronically controlled power steering apparatus of the vehicle which concerns on a prior art. It is sectional drawing which shows one side of the flow-path switching valve which concerns on a prior art. It is sectional drawing which shows the other side surface of the flow-path switching valve based on a prior art, and one side surface of a pressure control valve (PCV: Pressure Control Valve). It is sectional drawing which shows the operating state of a pressure control valve when the vehicle is drive | working at low speed. It is sectional drawing which shows the operating state of a pressure control valve when the vehicle is drive | working at high speed. It is a graph which shows the relationship between the input torque at the time of the action | operation of the pressure control valve which concerns on a prior art, and the pressure of the hydraulic fluid supplied from a hydraulic pump. It is a graph which shows the relationship between the pressure (supply pressure) of the hydraulic oil supplied from the hydraulic pump at the time of the action | operation of the pressure control valve which concerns on a prior art, and the pressure (reaction force pressure) of the hydraulic oil which acts on a hydraulic reaction force part. . It is sectional drawing which shows the pressure control valve which concerns on the 1st Embodiment of this invention. It is a fragmentary sectional view showing the 1st valve concerning a 1st embodiment of the present invention. It is a graph which shows the relationship between input torque and the pressure of the hydraulic fluid supplied from a hydraulic pump. It is a graph which shows the relationship between the pressure (supply pressure) of the hydraulic fluid supplied from a hydraulic pump, and the pressure (reaction force pressure) of the hydraulic fluid which acts on a hydraulic reaction force part. It is sectional drawing which shows the pressure control valve which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Hydraulic pump 103 Flow path switching valve 105 Actuation cylinder 107 Vehicle speed sensor 109 Electronic control device 111 Pressure control valve 203 Input shaft 205 Pinion shaft 207 Reaction force plunger 209 Hydraulic reaction force part 217 Solenoid 221 Supply port 223 Discharge port 224 Reaction force port 701 First valve body 703 First spool 705 First elastic member 707 First flow path 709 Cap 710 First valve 711 Second valve body 713 Second spool 715 Second elastic member 717 Second flow path 720 Second valve 721 Support body 723 Adjustment plug 730 Valve housing 731 Suppression protrusion 801 Filter 803 Blocking prevention groove 1101 Connection port

Claims (15)

An electronically controlled power steering apparatus for a vehicle including a hydraulic reaction force part that regulates relative displacement between an input shaft and a pinion shaft and a pressure control valve that controls supply of hydraulic oil to the hydraulic reaction force part:
The pressure control valve includes a first valve and a second valve;
The first valve includes a hollow first valve body having a discharge port and a supply port formed on the outer peripheral side, and a first flow path that communicates with the supply port and opens on the lower side. A first spool that is slidably provided inside the one valve body, and a first elastic member that is provided above the first spool;
The second valve body includes a hollow second valve main body having a radial port formed on an outer peripheral side thereof, and a second flow path that communicates with the radial port and opens on one side, the second valve main body Including a second spool slidably provided inside, a second elastic member provided on one side of the second spool, and a solenoid provided on the other side of the second spool. , Electronically controlled power steering system for vehicles.   The first valve and the second valve are built in close proximity to each other inside a hollow-shaped valve housing, and the valve housing includes a restraining protrusion between the first valve and the second valve. The electronically controlled power steering apparatus for a vehicle according to claim 1.   The electronically controlled power steering apparatus for a vehicle according to claim 1, wherein a plug is provided on the upper side of the first elastic member.   The electronically controlled power steering apparatus for a vehicle according to claim 3, wherein the plug is press-fitted into the first valve body and coupled.   The vehicle electronically controlled power steering apparatus according to claim 3, wherein the plug is screwed to the first valve body.   The electronically controlled power steering apparatus for a vehicle according to claim 3, further comprising a support body in contact with each of a lower side of the plug and an upper side of the first elastic member.   The electronically controlled power steering apparatus for a vehicle according to claim 1, wherein a hollow cap communicating with the first flow path is provided below the first spool.   2. The electronically controlled power steering apparatus for a vehicle according to claim 1, wherein a hollow cap communicated with the second flow path is provided on one side of the second elastic member. 3.   9. The electronically controlled power steering apparatus for a vehicle according to claim 7, wherein an orifice is provided inside the cap.   The vehicle electronically controlled power steering apparatus according to claim 1, wherein a filter is provided at an inlet of the supply port.   11. The vehicle electronically controlled power steering apparatus according to claim 10, wherein a groove is formed at a predetermined depth from the outer peripheral surface of the first valve body to the inside of the supply port.   The electronically controlled power steering apparatus for a vehicle according to any one of claims 1 to 11, wherein the first valve and the second valve are provided in parallel to each other in the axial direction.   The electronically controlled power steering apparatus for a vehicle according to claim 12, wherein the first valve and the second valve are coaxially provided.   The electronically controlled power steering apparatus for a vehicle according to any one of claims 1 to 11, wherein the second valve is provided in a direction perpendicular to the axial direction of the first valve.   The electronically controlled power steering apparatus for a vehicle according to any one of claims 1 to 14, wherein the second valve is provided below the first valve.

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