KR20060032280A - Pressure control valve for electronic control power steering system - Google Patents

Pressure control valve for electronic control power steering system Download PDF

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Publication number
KR20060032280A
KR20060032280A KR1020040081169A KR20040081169A KR20060032280A KR 20060032280 A KR20060032280 A KR 20060032280A KR 1020040081169 A KR1020040081169 A KR 1020040081169A KR 20040081169 A KR20040081169 A KR 20040081169A KR 20060032280 A KR20060032280 A KR 20060032280A
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KR
South Korea
Prior art keywords
piezoelectric element
power steering
flow path
pressure control
valve
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KR1020040081169A
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Korean (ko)
Inventor
손명섭
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주식회사 만도
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Priority to KR1020040081169A priority Critical patent/KR20060032280A/en
Publication of KR20060032280A publication Critical patent/KR20060032280A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • B62D5/075—Supply of pressurised fluid for steering also supplying other consumers ; control thereof using priority valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/061—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle provided with effort, steering lock, or end-of-stroke limiters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/40—Actuators for moving a controlled member
    • B60Y2400/418—Power assistance, e.g. servo-motors
    • B60Y2400/4187—Servo-motors, e.g. electric or fluidic with feedback control

Abstract

본 발명은, 구조 및 구성과 제작이 간단하고 가격도 저렴한 반력제어식 전자제어 파워 스티어링용 압력제어밸브를 개시한다.The present invention discloses a pressure control valve for a reaction force controlled electronically controlled power steering, which is simple in structure, configuration, and manufacture, and which is low in cost.

본 발명의 구성은, 입력축과 피니언축 및 밸브본체에 의해 형성된 반력실로 통하는 유로에 설치되어 차량의 주행 속도에 따라 상기 반력실 내로 공급되는 작동유의 유압을 조절하는 반력제어식 전자제어 파워 스티어링용 압력제어밸브에 있어서, 상기 유로에 설치되는 하우징; 전원과 연결되어 상기 하우징 내에 설치되는 압전소자; 상기 압전소자의 일측에 장착되는 로드; 상기 로드에 연결되어 전원 인가시 상기 압전소자의 변형에 의해 상기 유로를 개폐하는 밸브체로 이루어진 것을 특징으로 한다.
The configuration of the present invention, the reaction force control electronic control power steering pressure control is provided in the flow path to the reaction chamber formed by the input shaft, the pinion shaft and the valve body to adjust the hydraulic pressure of the hydraulic oil supplied into the reaction chamber according to the traveling speed of the vehicle A valve, comprising: a housing installed in the flow path; A piezoelectric element connected to a power source and installed in the housing; A rod mounted on one side of the piezoelectric element; And a valve body connected to the rod to open and close the flow path by deformation of the piezoelectric element when power is applied.

반력제어, ECPS, 전자제어, 파워 스티어링, 압력제어밸브, 압전소자, 솔레노이드Reaction Force Control, ECPS, Electronic Control, Power Steering, Pressure Control Valve, Piezoelectric Element, Solenoid

Description

반력제어식 전자제어 파워 스티어링용 압력제어밸브 {Pressure Control Valve for Electronic Control Power Steering System} Pressure Control Valve for Electronic Control Power Steering System             

도 1 : 반력제어식 전자제어 파워 스티어링장치의 일례를 나타낸 단면도1 is a cross-sectional view showing an example of the reaction force control electronic control power steering apparatus

도 2 : 종래의 압력제어밸브로 사용되는 솔레노이드 밸브를 나타낸 단면도2 is a cross-sectional view showing a solenoid valve used as a conventional pressure control valve.

도 3 : 본 발명에 따른 압력제어밸브와 그 설치 부위를 개략적으로 나타낸 도면3 is a view schematically showing a pressure control valve and its installation site according to the present invention

<도면의 주요 부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 하우징 2 : 전원1: housing 2: power

3 : 압전소자 4 : 로드3: piezoelectric element 4: rod

5 ; 밸브체
5; Valve body

본 발명은 자동차의 파워 스티어링 장치에 관련된 기술로서, 보다 상세하게는, 반력제어식 전자제어 파워 스티어링 장치에서 반력부로 제공되는 압력을 제어 하는 압력제어밸브에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power steering apparatus for automobiles, and more particularly, to a pressure control valve for controlling a pressure provided to a reaction force unit in a reaction force controlled electronic control power steering apparatus.

자동차의 파워 스티어링 장치는 운전자의 조향 휠 조작력을 보조하는 배력장치를 구비함으로써 운행 조건에 따라 적절한 조향이 이루어지도록 한다.The power steering device of the vehicle is provided with a boosting device for assisting the steering wheel operation force of the driver so that proper steering is made according to the driving conditions.

이러한 파워 스티어링 장치중에 전자제어 파워 스티어링 장치(ECPS : Electronic Control Power Steering System)는, 차속에 따라 조향력을 변화시킴으로써, 고속주행시에는 조향 휠의 조작을 무겁게 하여 조향 안정성을 확보하고 주차시에는 조향 노력(steering effort)을 가볍게 하는 기술을 구현하고 있다.Among these power steering devices, the Electronic Control Power Steering System (ECPS) changes the steering force according to the vehicle speed, thereby making the steering wheel heavy during high-speed driving to ensure steering stability and steering effort when parking. Implementing techniques to lighten the steering effort.

특히, ECPS는 유압 실린더에 가해지는 유압을 변화시켜 조향 배력을 조절하는데, 그 방법에 따라 유량 제어식과 반력 제어식으로 나뉘어지며, 특히 반력 제어식은 유압펌프와 연결된 압력제어밸브의 밸브 하우징에 반력 플런저 내지 반력 피스톤을 구비하여 고속 주행 여부에 따라 입력축을 구속하거나 해제함으로써 고속주행시의 조향 휠 안정성을 확보하게 된다.In particular, ECPS adjusts the steering force by changing the hydraulic pressure applied to the hydraulic cylinder, which is divided into a flow control type and a reaction force control type, in particular, the reaction force control type has a reaction force plunger or the like in the valve housing of the pressure control valve connected to the hydraulic pump. A reaction force piston is provided to restrain or release the input shaft according to whether the vehicle travels at a high speed to secure steering wheel stability at high speeds.

이러한 반력제어식 ECPS의 일례가 첨부도면 도 1에 도시되어 있다. 도시된 바와 같이, 입력축(100) 내에 장착된 토션 바(200)의 하단부에 피니언축(300)이 구비되어 있고, 입력축(100)과 피니언축(300)은 밸브본체(400) 내에 설치되어 있으며, 입력축(100)과 피니언축(300) 및 밸브본체(400)에 의해 반력실(R)이 형성되어 있다. 그리고, 이 반력실(R)에는 압력제어밸브로 작동하는 솔레노이드 밸브(500)가 유로(510)를 통해 연결되어 있는데, 차량의 주행 속도에 따라 솔레노이드 밸브(500)가 개폐됨으로써 반력실(R) 내로 공급되는 작동유의 유압이 조절되 어 주행 안정성을 증가시키게 된다.An example of such a reaction force controlled ECPS is shown in FIG. 1. As shown, the pinion shaft 300 is provided at the lower end of the torsion bar 200 mounted in the input shaft 100, the input shaft 100 and the pinion shaft 300 is installed in the valve body 400 The reaction chamber R is formed by the input shaft 100, the pinion shaft 300, and the valve body 400. In addition, a solenoid valve 500 acting as a pressure control valve is connected to the reaction chamber R through a flow path 510. The solenoid valve 500 is opened and closed according to the traveling speed of the vehicle, thereby causing the reaction chamber R to be opened. The hydraulic pressure of the hydraulic fluid supplied into the tank is adjusted to increase driving stability.

한편, 반력실로 공급되는 유압을 조절하는 종래의 압력제어밸브, 즉 솔레노이드 밸브는, 도 2에 도시된 통상적인 솔레노이드 밸브와 같이, 터미널(10)을 통해 공급된 전류가 코일(20)에 흐르면 플런저(30)와 로드(40)가 작동하여 밸브가 개폐되는 구조로 되어 있다. 그런데, 이러한 솔레노이드 밸브로 이루어진 종래의 압력제어밸브는 구조가 복잡하고 부품 가격도 비싸기 때문에 원가상승의 문제점이 있다.
On the other hand, the conventional pressure control valve, that is, the solenoid valve for adjusting the hydraulic pressure supplied to the reaction chamber, like the conventional solenoid valve shown in Figure 2, when the current supplied through the terminal 10 flows to the coil 20, the plunger 30 and the rod 40 are operated to open and close the valve. However, the conventional pressure control valve made of such a solenoid valve has a problem of cost increase because the structure is complicated and the parts price is expensive.

본 발명은 전술한 바와 같은 종래의 문제점을 개선하기 위해 안출된 것으로서, 그 목적은, 구조 및 구성과 제작이 간단하고 가격도 저렴한 반력제어식 전자제어 파워 스티어링용 압력제어밸브를 제공하는 데에 있다.
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to provide a pressure control valve for a reaction force controlled electronic control power steering, which is simple in structure, structure, manufacture and low cost.

위와 같은 목적을 달성하기 위한 본 발명에 따른 반력제어식 전자제어 파워 스티어링용 압력제어밸브는, 입력축과 피니언축 및 밸브본체에 의해 형성된 반력실로 통하는 유로에 설치되어 차량의 주행 속도에 따라 상기 반력실 내로 공급되는 작동유의 유압을 조절하는 반력제어식 전자제어 파워 스티어링용 압력제어밸브에 있어서, 상기 유로에 설치되는 하우징; 전원과 연결되어 상기 하우징 내에 설치되는 압전소자; 상기 압전소자의 일측에 장착되는 로드; 상기 로드에 연결되어 전원 인가시 상기 압전소자의 변형에 의해 상기 유로를 개폐하는 밸브체로 이루어진 것을 특징으로 한다.
In order to achieve the above object, the pressure control valve for the reaction force controlled electronic power steering according to the present invention is installed in a flow path leading to a reaction chamber formed by an input shaft, a pinion shaft, and a valve body, and into the reaction chamber according to the traveling speed of the vehicle. A pressure control valve for a reaction force controlled electronic control power steering for adjusting the hydraulic pressure of a supplied hydraulic oil, the pressure control valve comprising: a housing installed in the flow path; A piezoelectric element connected to a power source and installed in the housing; A rod mounted on one side of the piezoelectric element; And a valve body connected to the rod to open and close the flow path by deformation of the piezoelectric element when power is applied.

이하에서는 본 발명의 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

첨부도면 도 3은 본 발명에 따른 압력제어밸브와 그 설치 부위를 개략적으로 나타낸 도면으로서, 전술한 도 1과 동일한 부위에 대해서는 동일한 참조부호를 부여하여 설명한다. 도시된 바와 같이, 입력축(100)과 피니언축(300) 및 밸브본체(400)에 의해 형성된 반력실(R)에 유로(510)가 연결되어 있고, 이 유로(510)상에 본 발명의 압력제어밸브가 설치되는데, 그 구성은 다음과 같다. 먼저, 유로(510)의 도중에 설치되는 하우징(1)이 구비되어 있으며, 이 하우징(1)의 내부에는 전원(2)과 연결된 상태로 압전소자(piezoelectric element : 3)가 설치되어 있다. 그리고, 압전소자(3)의 일측에 상기 유로(510)를 향하여 돌출된 로드(4)가 장착되어 있고, 이 로드(4)에는 압전소자(3)의 변형에 의해 유로(510)를 개폐하는 밸브체(5)가 설치되어 있다.3 is a view schematically illustrating a pressure control valve and an installation part thereof according to the present invention, and the same parts as in FIG. 1 will be described with the same reference numerals. As shown, the flow path 510 is connected to the reaction chamber R formed by the input shaft 100, the pinion shaft 300, and the valve body 400, and the pressure of the present invention on the flow path 510. The control valve is installed, and the configuration is as follows. First, a housing 1 provided in the middle of the flow path 510 is provided, and a piezoelectric element 3 is provided inside the housing 1 in a state of being connected to a power source 2. A rod 4 protruding toward the flow passage 510 is mounted on one side of the piezoelectric element 3, and the rod 4 opens and closes the flow passage 510 by deformation of the piezoelectric element 3. The valve body 5 is provided.

이와 같이, 본 발명의 압력제어밸브는 압전소자(3)의 응용을 요지로 하고 있는바, 이 압전소자(3)는 주지된 바와 같이 전기가 가해지면 변형이 일어나는 재료로서 티탄산바륨 ·로셸염 ·인산이수소암모늄 ·타르타르산에틸렌디아민 등의 결정체가 사용된다.As described above, the pressure control valve of the present invention has an application of the piezoelectric element 3. The piezoelectric element 3 is a barium titanate, Rochelle salt, or the like, which is a material that deforms when electricity is applied, as is well known. Crystals, such as ammonium dihydrogen phosphate and ethylene diamine tartrate, are used.

이에 따라, 예컨대 압전소자(3)에 (+) 전원이 인가되면 압전소자가 팽창 변 형되어 로드(4)를 밀게 됨에 따라 로드(4)에 연결되어 있는 밸브체(5)가 유로(510)를 개방함으로써 반력실(R)에 소정의 유압이 가해지게 된다. 또한, 압전소자(3)에 (-) 전원이 인가되면 압전소자(3)가 수축 변형되어 로드(4)를 당기게 됨에 따라 로드(4)에 연결된 밸브(5)가 유로(510)를 다시 폐쇄시킴으로써 반력실(R)에 대한 유압의 작용을 차단하게 된다.Accordingly, for example, when positive power is applied to the piezoelectric element 3, the piezoelectric element is expanded and deformed to push the rod 4. By opening the predetermined pressure, a predetermined hydraulic pressure is applied to the reaction chamber (R). In addition, when (-) power is applied to the piezoelectric element 3, the piezoelectric element 3 contracts and deforms to pull the rod 4, so that the valve 5 connected to the rod 4 closes the flow path 510 again. By doing so, the action of the hydraulic pressure on the reaction chamber R is blocked.

이와 같이, 본 발명의 압력제어밸브는 압전소자(3)의 고유한 특성인 압전성을 이용하여 유로(510)를 개폐하게 되므로, 하우징(1)과 로드(4) 및 밸브체(5)의 구성만으로 압력제어밸브가 구현되어, 코일과 플런저 등의 부품이 더 소요되고 제작도 까다로운 종래의 솔레노이드 밸브에 비하여 구조 또는 구성과 제작이 훨씬 간소화된다.
As described above, the pressure control valve of the present invention opens and closes the flow path 510 by using piezoelectricity, which is an inherent characteristic of the piezoelectric element 3, and thus, the structure of the housing 1, the rod 4, and the valve body 5. Only the pressure control valve is implemented, the structure or configuration and manufacturing is much simpler than the conventional solenoid valve, which requires more components such as coils and plungers and is also difficult to manufacture.

이상에서 설명한 바와 같이, 본 발명에 따른 반력제어식 전자제어 파워 스티어링용 압력제어밸브는, 소요 부품의 구조 또는 구성이 간단하여 제작이 용이하고 비용면에서도 유리하여 원가절감에 기여하는 효과가 있다.As described above, the reaction force control type electronic control power steering pressure control valve according to the present invention has a simple structure or configuration of the required parts, making it easy to manufacture and advantageous in terms of cost, thereby contributing to cost reduction.

Claims (1)

입력축과 피니언축 및 밸브본체에 의해 형성된 반력실로 통하는 유로에 설치되어 차량의 주행 속도에 따라 상기 반력실 내로 공급되는 작동유의 유압을 조절하는 반력제어식 전자제어 파워 스티어링용 압력제어밸브에 있어서,In the pressure control valve for the reaction force controlled electronic control power steering installed in the flow path to the reaction chamber formed by the input shaft, the pinion shaft and the valve body to adjust the hydraulic pressure of the hydraulic oil supplied into the reaction chamber according to the traveling speed of the vehicle, 상기 유로에 설치되는 하우징; 전원과 연결되어 상기 하우징 내에 설치되는 압전소자; 상기 압전소자의 일측에 장착되는 로드; 상기 로드에 연결되어 전원 인가시 상기 압전소자의 변형에 의해 상기 유로를 개폐하는 밸브체로 이루어진 것을 특징으로 하는 반력제어식 전자제어 파워 스티어링용 압력제어밸브.A housing installed in the flow path; A piezoelectric element connected to a power source and installed in the housing; A rod mounted on one side of the piezoelectric element; And a valve body connected to the rod for opening and closing the flow path by deformation of the piezoelectric element when power is applied.
KR1020040081169A 2004-10-12 2004-10-12 Pressure control valve for electronic control power steering system KR20060032280A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9915261B2 (en) 2013-10-31 2018-03-13 Semes Co., Ltd. Substrate treating apparatus, drive assembly, and drive member controlling method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9915261B2 (en) 2013-10-31 2018-03-13 Semes Co., Ltd. Substrate treating apparatus, drive assembly, and drive member controlling method

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