KR19980061287A - Speed sensitive power steering system and its control method - Google Patents

Speed sensitive power steering system and its control method Download PDF

Info

Publication number
KR19980061287A
KR19980061287A KR1019960080657A KR19960080657A KR19980061287A KR 19980061287 A KR19980061287 A KR 19980061287A KR 1019960080657 A KR1019960080657 A KR 1019960080657A KR 19960080657 A KR19960080657 A KR 19960080657A KR 19980061287 A KR19980061287 A KR 19980061287A
Authority
KR
South Korea
Prior art keywords
pump
rotor
power steering
speed
steering system
Prior art date
Application number
KR1019960080657A
Other languages
Korean (ko)
Other versions
KR100268087B1 (en
Inventor
이재복
Original Assignee
박병재
현대자동차 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 박병재, 현대자동차 주식회사 filed Critical 박병재
Priority to KR1019960080657A priority Critical patent/KR100268087B1/en
Publication of KR19980061287A publication Critical patent/KR19980061287A/en
Application granted granted Critical
Publication of KR100268087B1 publication Critical patent/KR100268087B1/en

Links

Classifications

    • 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
    • B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/02—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to vehicle speed
    • 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
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2410/00—Constructional features of vehicle sub-units
    • B60Y2410/13—Materials or fluids with special properties
    • B60Y2410/132—Magnetic, e.g. permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Power Steering Mechanism (AREA)

Abstract

본 발명은 자동차의 조향장치에 관한 것이며, 특히 대형트럭의 파워스티어링 시스템에 관한 것이다. 본 발명에 따른 파워스티어링 펌프(10)의 선단에는 전자석 로터(11)가 설치되어 있으며, 엔진에 설치되어 회전하는 엔진측 로터(20)와 마주보도록 설치된다. 파워스티어링 펌프(10)의 로터코일(12)에는 가변저항(15)을 통해 전원(17)으로부터 전류가 인가되며 가변저항(15)의 저항값은 제어부(30)에 의해 제어된다. 한편, 제어부(30)는 차속센서(31)로부터 차속에 대한 신호를 받아 가변저항(15)의 저항값을 변화시켜 엔진의 로터(20)와 펌프(10)의 로터(11) 사이의 자력을 제어하여 펌프로터(11)의 회전속도를 제어하므로써 펌프(10)에 의한 토출유량과 유압을 제어하게 딘다.TECHNICAL FIELD The present invention relates to a steering apparatus of a motor vehicle, and more particularly, to a power steering system of a large truck. The electromagnet rotor 11 is installed at the tip of the power steering pump 10 according to the present invention, and is installed to face the engine side rotor 20 that is installed and rotated in the engine. Current is applied to the rotor coil 12 of the power steering pump 10 from the power source 17 through the variable resistor 15, and the resistance value of the variable resistor 15 is controlled by the controller 30. On the other hand, the control unit 30 receives a signal for the vehicle speed from the vehicle speed sensor 31 to change the resistance value of the variable resistor 15 to generate a magnetic force between the rotor 20 of the engine and the rotor 11 of the pump 10. By controlling the rotational speed of the pump rotor 11 by controlling, it is possible to control the discharge flow rate and the hydraulic pressure by the pump 10.

상술한 바와 같이 구성된 속도감응형 파워스티어링 시스템을 사용하므로써, 고속영역에서의 펌프의 작동유 토출량과 토출유압을 감소시켜 스티어링휠 에포트를 증가시켜 조향안전성을 향상시킬 수 있다.By using the speed-sensitive power steering system configured as described above, it is possible to increase the steering wheel effort by reducing the hydraulic oil discharge amount and the discharge oil pressure of the pump in the high speed region, thereby improving steering safety.

Description

속도감응형 파워스티어링 시스템 및 그 제어방법Speed sensitive power steering system and its control method

본 발명은 자동차의 조향장치에 관한 것이며, 특히 대형트럭의 파워스티어링 시스템에 관한 것이다.TECHNICAL FIELD The present invention relates to a steering apparatus of a motor vehicle, and more particularly, to a power steering system of a large truck.

조향장치(steering system)란 자동차의 진행 방향을 변경하기 위해 사용되는 장치로 조향휠, 스티어링 샤프트 및 컬럼 등으로 이루어진 조작기구, 워엄 섹터형, 워엄 섹터롤러형, 볼너트형, 가변기어비형, 래크 피니언형 등의 조향 기어기구 및 피트먼아암, 조향링크, 조향 너클 등으로 이루어진 링크기구로 구성되어 조향휠의 회전을 조향기어를 통하여 구동휠로 전달하는 기계식의 조향장치와, 조작력경감을 위하여 동력실린더를 사용하는 파워스티어링(Power Steering)방식이 사용되고 있다.Steering system is a device used to change the direction of travel of a vehicle. Steering wheel, steering shaft, column, etc., control mechanism, worm sector type, worm sector roller type, ball nut type, variable gear ratio type, rack Steering gear mechanism such as pinion type and link mechanism composed of pitman arm, steering link, steering knuckle, etc., and mechanical steering system to transmit the steering wheel rotation to the driving wheel through the steering gear, and to reduce power Power steering method using cylinder is used.

한편, 파워스티어링 시스템중 차속감응형(SSPS) 파워스티어링 시스템은 자동차의 주행속도에 따라 유압배력을 제어하는 방식으로, 주행속도가 낮은 경우 유압 배력을 모두 이용하고 속도가 증가함에 따라 유압배력을 감소시킨다. 이는 고속에서는 운전자의 조향력만으로 조향되도록 하여, 운전자가 노면과의 향상된 접촉감각을 느끼면서 운전할 수 있도록 하기 위한 방법이다.On the other hand, the vehicle speed-sensitive (SSPS) power steering system of the power steering system controls the hydraulic power in accordance with the driving speed of the vehicle.When the driving speed is low, all the hydraulic power is used and the hydraulic power decreases as the speed increases. Let's do it. This is a method for steering at a high speed by steering only by the driver's steering force, so that the driver can drive while feeling an improved contact with the road surface.

도 1에 종래의 일반적인 속도감응형 파워스티어링 시스템의 구성이 도시되어 있다.1 shows a configuration of a conventional general speed sensitive power steering system.

도시된 바와 같이, 본 발명에 따른 파워스티어링 시스템은 엔진의 크랭크 풀리와 연결되어 구동하는 파워스티어링 펌프(1)에 의해 기어박스(3)로 공급되는 작동유는 제어부(4)에 의해 차속에 따라 제어밸브(2)의 개도를 가변시켜 기어박스(3)로 공급하며 기어박스(3)를 통과한 작동유는 펌프(1)로 작동유를 공급하는 리저브탱크(6)로 수집되도록 구성되어 있다.As shown, in the power steering system according to the present invention, the hydraulic oil supplied to the gearbox 3 by the power steering pump 1 connected to and driven by the crank pulley of the engine is controlled according to the vehicle speed by the controller 4. The opening degree of the valve 2 is supplied to the gearbox 3, and the hydraulic oil which has passed through the gearbox 3 is configured to be collected by the reserve tank 6 which supplies the hydraulic oil to the pump 1.

이러한 토출유량의 제어는 제어부(4)에서 차속센서(5)로부터 차속에 대한 신호를 받아 차속이 고속일 경우에는 토출 유량을 줄이고, 차속이 저속일 때는 토출유량을 늘려 스티어링 휠에 의한 조향감을 일정하게 유지하기 위한 것이다.In order to control the discharge flow rate, the control unit 4 receives a signal for the vehicle speed from the vehicle speed sensor 5 and decreases the discharge flow rate when the vehicle speed is high speed, and increases the discharge flow rate when the vehicle speed is low speed, thereby maintaining a feeling of steering by the steering wheel. It is to keep it.

그러나, 상술한 종래의 파워스티어링 시스템에서는 제어밸브(2)를 통해 펌프(1)로부터 기어박스(3)로 공급되는 유량만을 제어할 뿐 펌프(1)의 가압력이 일정하므로 공급되는 작동유의 압력이 일정하고 고속에서 펌프의 토출유량이 많으므로 속도감응형으로서의 효과가 미미하게 된다.However, in the above-described conventional power steering system, only the flow rate supplied to the gearbox 3 from the pump 1 is controlled through the control valve 2, so the pressure of the pump 1 is constant, so that the pressure of the hydraulic oil supplied is Since the discharge flow rate of the pump is large at a constant and high speed, the effect as a speed-sensitive type is insignificant.

본 발명의 목적은 작동유의 유량은 물론 펌프에 의한 작동유의 압력을 제어함으로써 유량과 동시에 유압을 제어하여 고속영역에서 스티어링 에포트를 무겁게 하여 조향안정성을 향상시키기 위한 파워스티어링 시스템을 제공하는 것이다.An object of the present invention is to provide a power steering system for improving the steering stability by controlling the flow rate of the hydraulic fluid as well as the pressure of the hydraulic fluid by the pump to control the flow rate and the hydraulic pressure at the same time to increase the steering stability in the high speed region.

도 1은 종래의 대형트럭용 파워스티어링 시스템의 블럭도이다.1 is a block diagram of a conventional power steering system for a large truck.

도2는 본 발명에 따른 속도감응형 파워스티어링 시스템의 구성도이다.2 is a block diagram of a speed-sensitive power steering system according to the present invention.

도 3은 본 발명에 따른 속도감응형 펌프의 구성도이다.3 is a block diagram of a speed-sensitive pump according to the present invention.

도 4 는 본 발명에 따른 속도감응형 파워스티어링 시스템의 차속에 대한 토출유량의 변화를 도시하는 유량선도이다.4 is a flow chart showing the change of discharge flow rate with respect to the vehicle speed of the speed-sensitive power steering system according to the present invention.

도 5는 본 발명에 따른 속도감응형 파워스티어링 시스템에서 차속에 따라 로터로 공급되는 인가전류의 변화를 도시하는 선도이다.FIG. 5 is a diagram showing a change in applied current supplied to a rotor according to a vehicle speed in a speed-sensitive power steering system according to the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10:펌프11:로터10: pump 11: rotor

12:마그네틱코일15:가변저항12: magnetic coil 15: variable resistance

20:엔진로터30:제어부20: engine rotor 30: control unit

31:차속센서40:기어박스31: Vehicle speed sensor 40: Gear box

45:리저브탱크45: Reserve tank

이러한 목적을 달성하기 위해, 본 발명은 엔진에 설치된 로터; 마그네틱코일을 가진 로터를 구비한 파워스티어링 펌프; 펌프의 로터에 설치된 마그네틱코일에 인가되는 전류를 가변시키기 위한 가변저항; 및 차속에 따라 가변저항을 제어하기 위한 제어부로 구성되는 속도감응형 파워스티어링 시스템을 제공한다.In order to achieve this object, the present invention is a rotor installed in the engine; A power steering pump having a rotor with a magnetic coil; A variable resistor for varying the current applied to the magnetic coil installed in the rotor of the pump; And a control unit for controlling the variable resistor in accordance with the vehicle speed.

상술한 바와 같이 구성된 속도감응형 파워스티어링 시스템을 사용함으로써, 고속영역에서의 펌프의 작동유 토출량과 토출유압을 감소시켜 스티어링휠 에포트를 증가시켜 조향안전성을 향상시킬 수 있다.By using the speed-sensitive power steering system configured as described above, it is possible to increase the steering wheel effort by reducing the hydraulic oil discharge amount and the discharge oil pressure of the pump in the high speed region, thereby improving steering safety.

이하, 첨부도면을 참조하여, 본 발명에 따른 속도감응형 파워스티어링 시스템에 대해 보다 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, a speed-sensitive power steering system according to the present invention will be described in more detail.

도 2에 본 발명에 따른 속도감응형 파워스티어링 시스템의 구성이 도시되어 있다.2 shows a configuration of a speed-sensitive power steering system according to the present invention.

도시된 바와 같이, 본 발명에 따른 파워스티어링 펌프(10)의 선단에는 마그네틱코일이 설치된 로터(11)가 설치되어 있으며, 엔진에 설치되어 회전하는 엔진축로터(20)와 마주보도록 설치된다.As shown, the rotor 11 is provided with a magnetic coil is installed at the tip of the power steering pump 10 according to the present invention, it is installed to face the engine shaft rotor 20 is installed and rotated in the engine.

또한, 도 3에 본 발명에 따른 파워스티어링 펌프(10)용 로터(11)의 마그네틱코일(12)에 전류를 인가하기 위한 구성이 도시되어 있다.In addition, FIG. 3 shows a configuration for applying a current to the magnetic coil 12 of the rotor 11 for the power steering pump 10 according to the present invention.

도시된 바와 같이, 본 발명에 따른 파워스티어링 펌프(10)의 마그네틱코일(12)에는 가변저항(15)을 통해 전원(35)으로 부터 전류가 인가되며 가변저항(15)의 저항값은 제어부(30)에 의해 제어된다. 한편, 제어부(30)는 차속센서(31)로부터 차속에 대한 신호를 받아 가변저항(15)의 저항값을 변화시켜 엔진의 로터(20)와 펌프(10)의 로터(11) 사이의 자력을 제어하여 펌프 로터(11)의 회전속도를 제어하므로써 펌프(10)에 의한 토출유압을 제어하게 된다.As shown, the current is applied to the magnetic coil 12 of the power steering pump 10 according to the present invention from the power source 35 through the variable resistor 15 and the resistance value of the variable resistor 15 is controlled by the control unit ( 30). On the other hand, the control unit 30 receives a signal for the vehicle speed from the vehicle speed sensor 31 to change the resistance value of the variable resistor 15 to generate a magnetic force between the rotor 20 of the engine and the rotor 11 of the pump 10. By controlling the rotational speed of the pump rotor 11 by controlling, the discharge hydraulic pressure by the pump 10 is controlled.

도 4에 본 발명에 따른 속도감응형 파워스티어링 시스템의 차속에 따른 펌프(10)의 토출유량을 표시한 유량선도이다.4 is a flow chart showing the discharge flow rate of the pump 10 according to the vehicle speed of the speed-sensitive power steering system according to the present invention.

도시된 바와 같이, 본 발명에 따른 속도감응형 파워스티어링 시스템에서는 차속에 따라 저속에서는 토출유량을 점증적으로 증가시켜 스티어링에포트를 감소시키고, 고속에서는 토출유량을 감소시켜 스티어링에포트를 증가시켜 조향의 안정성을 향상시키게 된다.As shown, in the speed-sensitive power steering system according to the present invention, the steering flow is decreased by gradually increasing the discharge flow rate at low speed according to the vehicle speed, and the steering effort is increased by decreasing the discharge flow rate at high speed. It will improve the stability of.

또한 토출량의 변화를 위해, 펌프(10)의 로터(11)에 설치된 마그네틱코일(12)에 인가되는 전류의 변화가 도 5에 도시되어 있다.Also, in order to change the discharge amount, the change in the current applied to the magnetic coil 12 installed in the rotor 11 of the pump 10 is shown in FIG.

도시된 바와 같이, 본 발명에 따른 속도감응형 파워스티어링 시스템에서는 마그네틱코일(12)로 공급되는 전류를 전원(25)과 마그네틱코일(12)사이에 설치된 가변저항(15)을 제어하여 이루어지며, 저속과 중속에서는 일정한 전류를 인가하다가, 고속에서는 가변저항(15)의 저항값을 차량의 속도에 따라 점증적으로 크게 하여 엔진 로터(20)에 의한 펌프 로터(11)의 회전력을 감소시키도록 구성된다. 이에 따라, 차속에 따라 펌프(10)의 회전속도가 변화되므로 펌프(10)로부터 공급되는 작동유의 유량과 유압을 변화시켜 파워스티어링 기어박스(40)로 공급하여 파워스티어링 휠의 조작에포트를 변화시키게 된다. 한편, 펌프(10)로부터 기어박스(40)로 공급된 작동유는 리저브탱크(45)로 수집되어 펌프(10)로 순환하게 된다As shown, the speed-sensitive power steering system according to the present invention is made by controlling the variable resistor 15 installed between the power supply 25 and the magnetic coil 12, the current supplied to the magnetic coil 12, While applying a constant current at low and medium speeds, and at high speeds, the resistance value of the variable resistor 15 is gradually increased according to the speed of the vehicle to reduce the rotational force of the pump rotor 11 by the engine rotor 20. do. Accordingly, since the rotational speed of the pump 10 is changed according to the vehicle speed, the flow rate and the hydraulic pressure of the hydraulic oil supplied from the pump 10 are changed and supplied to the power steering gear box 40 to change the operation effort of the power steering wheel. Let's go. On the other hand, the hydraulic oil supplied from the pump 10 to the gearbox 40 is collected by the reserve tank 45 is circulated to the pump 10

한편, 본 발명에 따른 속도감응형 파워스티어링 시스템의 펌프의 구동력제어장치는 독립적으로 사용하던가 혹은 종래의 제어밸브타입의 속도감응형 파워스티어링 시스템과 병행하여 사용할 수도 있다.On the other hand, the driving force control device of the pump of the speed-sensitive power steering system according to the present invention may be used independently or in combination with a speed-controlled power steering system of a conventional control valve type.

상술한 바와 같이 구성된 속도감응형 파워스티어링 시스템을 사용하므로써, 고속영역에서의 펌프의 작동유 토출량과 토출유압을 감소시켜 스티어링 에포트를 증가시켜 조향안전성을 향상시킬 수 있다.By using the speed-sensitive power steering system configured as described above, it is possible to increase the steering effort by reducing the hydraulic oil discharge amount and the discharge oil pressure of the pump in the high speed region, thereby improving steering safety.

이상에서 본 발명의 구체적인 일 실시예를 상세히 설명하였으나, 본 발명은 이에 한정되는 것은 아니며, 이 분야의 통상의 지식을 가진 자라면 본 발명의 기술적 사상을 바탕으로 다양한 변경과 수정이 가능할 것이다.Although one specific embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art based on the technical idea of the present invention.

Claims (1)

엔진에 설치된 로터; 마그네틱코일을 가진 로터를 구비한 파워스티어링 펌프; 펌프로터의 마그네틱코일에 인가되는 전류를 가변시키기 위한 가변저항; 및 차속에 따라 가변저항을 제어하기 위한 제어부로 구성되는 속도감응형 파워스티어링 펌프 시스템.Rotor installed in the engine; A power steering pump having a rotor with a magnetic coil; A variable resistor for varying the current applied to the magnetic coil of the pump rotor; And a control unit for controlling the variable resistance according to the vehicle speed.
KR1019960080657A 1996-12-31 1996-12-31 Power steering apparatus sensing velocity of vehicle and method control KR100268087B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960080657A KR100268087B1 (en) 1996-12-31 1996-12-31 Power steering apparatus sensing velocity of vehicle and method control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960080657A KR100268087B1 (en) 1996-12-31 1996-12-31 Power steering apparatus sensing velocity of vehicle and method control

Publications (2)

Publication Number Publication Date
KR19980061287A true KR19980061287A (en) 1998-10-07
KR100268087B1 KR100268087B1 (en) 2000-10-16

Family

ID=19493650

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960080657A KR100268087B1 (en) 1996-12-31 1996-12-31 Power steering apparatus sensing velocity of vehicle and method control

Country Status (1)

Country Link
KR (1) KR100268087B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100461366B1 (en) * 2001-12-04 2004-12-13 현대자동차주식회사 vehicle speed sensing power steering system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100461366B1 (en) * 2001-12-04 2004-12-13 현대자동차주식회사 vehicle speed sensing power steering system

Also Published As

Publication number Publication date
KR100268087B1 (en) 2000-10-16

Similar Documents

Publication Publication Date Title
CA1169782A (en) Power steering device for a vehicle
JPH01233169A (en) Control device for power steering device for vehicle
US4557343A (en) Power steering control apparatus and method
US6250418B1 (en) Power steering apparatus
KR100268087B1 (en) Power steering apparatus sensing velocity of vehicle and method control
US20190270480A1 (en) Apparatus and method for turning steerable vehicle wheels
JP2000142436A (en) Steering device
US4858713A (en) Power-assisted steering system
KR100268086B1 (en) Power steering apparatus sensing velocity of vehicle
JP3032849B2 (en) Power steering device
KR19990012172A (en) Steering system control method and apparatus for engine forklift
KR100193065B1 (en) Power steering control method
KR200192429Y1 (en) Power steering of speed induction
KR0131567B1 (en) Steering system
KR100192383B1 (en) Cornering radius control device for vehicles
KR200220602Y1 (en) Power steering system for vehicle
KR19980045425U (en) Power steering
KR20040040611A (en) Speed sensitive power steering system for vehicle
KR101020538B1 (en) Steering power reduction apparatus for car
JPS58180379A (en) Power steering unit
KR100259525B1 (en) Automatic cornering correction device of vehicle
KR19990040239A (en) Steering Wheel Control Force Control Device Using Magnetic Force
KR20030014444A (en) Steering system of vehicle
KR19980054951A (en) Power steering
KR100259536B1 (en) Power steering device

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20030630

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee