KR100188748B1 - Method of distributing engine power in 4 wheel drive car - Google Patents

Method of distributing engine power in 4 wheel drive car Download PDF

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Publication number
KR100188748B1
KR100188748B1 KR1019940026129A KR19940026129A KR100188748B1 KR 100188748 B1 KR100188748 B1 KR 100188748B1 KR 1019940026129 A KR1019940026129 A KR 1019940026129A KR 19940026129 A KR19940026129 A KR 19940026129A KR 100188748 B1 KR100188748 B1 KR 100188748B1
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South Korea
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wheel drive
vehicle
engine power
wheel
determining whether
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KR1019940026129A
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Korean (ko)
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KR960013753A (en
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유진호
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정몽규
현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
    • B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
    • B60K23/0808—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles for varying torque distribution between driven axles, e.g. by transfer clutch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
    • B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
    • B60K2023/085—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles automatically actuated
    • B60K2023/0858—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles automatically actuated with electric means, e.g. electro-hydraulic means
    • 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
    • B60Y2400/82—Four wheel drive systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

전륜형 4륜구동 자동 변속차량이 오르막 길 경사로에서 차량의 무게 중심이 후륜으로 편중되어 전륜의 접지력이 작아짐으로서 발생되는 타이어의 슬립을 방지하고자, 2륜구동과 4륜구동의 선택을 감지하는 절환레버 스위치로 현재의 구동상태를 판단하는 단계와, 오르막 길 경사로 주행인 가를 판단하는 단계와, 아이들 스위치가 오프 상태인가를 판단하는 단계와, 급 조향상태인가를 판단하는 단계를 포함하여 이루어지며, 상기한 단계들이 조건을 만족하면 솔레노이드 밸브를 듀티제어하여 유압제어식 다판 클러치를 작동시키는 4륜구동 자동 변속차량의 엔진동력 분배방법을 제공한다.Front wheel type four-wheel drive automatic shifting vehicle is a switching lever switch that detects the selection of two-wheel drive and four-wheel drive to prevent tire slip caused by the center of gravity of the vehicle being biased to the rear wheel on the uphill slope and the traction of the front wheel is reduced. Determining the current driving state, determining whether the vehicle is driving uphill, determining whether the idle switch is in the off state, and determining whether it is in a steep steering state. If these conditions are satisfied, the solenoid valve is duty-controlled to provide an engine power distribution method for a four-wheel drive automatic transmission vehicle that operates a hydraulically controlled multi-plate clutch.

Description

4륜구동 자동 변속차량의 엔진 동력 분배방법Engine Power Distribution Method for Four-wheel Drive Automatic Transmission Vehicles

제1도는 본 발명에 관련하는 4륜구동 제어 유닛의 신호 입출력 관게를 나타내는 도면.1 is a diagram showing a signal input / output relationship of a four-wheel drive control unit according to the present invention.

제2도는 본 발명에 관련하는 4륜구동 차량의 동력 전달계통을 설명하기 위한 도면.2 is a view for explaining a power transmission system of a four-wheel drive vehicle according to the present invention.

제3도는 본 발명에 관련하는 엔진 동력 분배방법을 설명하기 위한 작동 흐름도이다.3 is an operation flowchart for explaining an engine power distribution method according to the present invention.

본 발명은 4륜구동 자동 변속차량의 엔진동력 분배방법에 관한 것으로서, 보다 상세하게는 경사로 주행시 운전성능을 향상시키고 타이어의 슬립을 방지할 수 있는 엔진동력 분배방법에 관한 것이다.The present invention relates to an engine power distribution method of a four-wheel drive automatic transmission vehicle, and more particularly, to an engine power distribution method capable of improving driving performance and preventing tire slip during driving on a slope.

4륜 구동차량은 엔진의 동력을 4륜에 균등하게 분배하여 각 차륜의 회전력을 증대시키므로 고르지 못한 노면, 눈길이나 빙판, 흙탕길 등에서 뛰어난 주행성능을 나타낸다.The four-wheel drive vehicle distributes the engine's power equally to the four wheels to increase the rotational force of each wheel, resulting in excellent driving performance on uneven roads, snowy roads, ice and muddy roads.

이러한 차량은 전륜용 차동장치와 후륜용 차동장치, 그리고 이들 양 차동장치로 동력을 분배하여 주는 중앙차동장치 및 트랜스퍼 케이스를 필수 구성요소로 하고 있다.These vehicles require front wheel differentials and rear wheel differentials, and central differential and transfer cases that distribute power to both differentials.

또한 4륜 구동 차량은 엔진의 동력을 후륜에 전달하기 위한 수단으로 비스코스 커플링을 사용한다.Four-wheel drive vehicles also use viscose couplings as a means of transmitting engine power to the rear wheels.

이러한 4균 구동차량이 전륜 구동형인 경우, 경사로에 위치하게 되면 차량의 무게중심이 후방으로 치우치게 되므로 전륜의 접지력이 후륜에 비하여 낮아지게 된다.In the case of the four-wheel drive vehicle, the center of gravity of the vehicle is biased to the rear when the vehicle is located on the slope, so that the traction force of the front wheel is lower than that of the rear wheel.

이러한 상태에서는 차량이 정지후 출발을 하게 되면, 전륜의 슬립이 발생하게 되는데, 이와 같이 타이어의 슬립은 급출발시나 급가속시 특히 심하게 나타난다.In this state, when the vehicle starts after stopping, slippage of the front wheel occurs, and thus the slippage of the tire is particularly severe during rapid start or acceleration.

본 발명은 이러한 종래 기술의 문제점을 해소하기 위하여 발명된 것으로서, 본 발명의 목적은 경사로에서 출발시 엔진의 동력을 전륜에 비하여 후륜측으로 더욱 전달될 수 있도록 하는 엔진동력의 분배방법을 제공하는데 있다.The present invention has been invented to solve the problems of the prior art, and an object of the present invention is to provide a method of distributing engine power that can be transmitted to the rear wheel side more than the front wheel power when starting from the ramp.

이러한 본 발명의 목적을 달성하기 위하여, 2륜구동과 4륜구동의 선택을 감지하는 절환레버 스위치로 현재의 구동상태를 판단하는 단계와, 오르막 길 경사로 주행인 가를 판단하는 단계와, 아이들 스위치가 오프 상태인가를 판단하는 단계와, 급 조향 상태인가를 판단하는 단계를 포함하여 이루어지며, 상기한 단계들이 조건을 만족하면 솔레노이드 밸브를 듀티제어하여 유압제어식 다판 클러치를 작동시키는 4륜구동 자동 변속차량의 엔진동력 분배방법를 제공한다.In order to achieve the object of the present invention, determining the current driving state with a switching lever switch for detecting the selection of two-wheel drive and four-wheel drive, determining whether the driving uphill road, and the idle switch is off And determining whether the vehicle is steered. The engine power of the four-wheel drive automatic transmission vehicle operating the hydraulically controlled multi-plate clutch by duty-controlling the solenoid valve when the above steps are satisfied. Provide a distribution method.

상기한 절환레버 스위치 신호가 4륜 구동으로 독출되면 유압제어식 다판 클러치의 작동을 해지하는 4륜구동 자동 변속차량의 엔진동력 분배방법을 제공한다.Provided is an engine power distribution method of a four-wheel drive automatic transmission vehicle that terminates the operation of the hydraulically controlled multi-plate clutch when the switching lever switch signal is read by four-wheel drive.

이하 본 발명의 바람직한 실시예를 첨부한 도면에 따라 더욱 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

제1도는 본 발명에 관련하는 4륜구동 차량의 제어유닛으로 입력되는 신호와 출력되는 신호를 설명하기 위한 도면으로서, 마이크로 프로세서(2)의 신호 입력단에는 2륜구동과 4륜구동 절환레버 스위치(4)가 연결되어 현재의 동력전달상태를 입력시킬 수 있도록 되어 있다.1 is a view for explaining the signal input to the control unit of the four-wheel drive vehicle and the output signal according to the present invention, the two-wheel drive and four-wheel drive switching lever switch (4) at the signal input terminal of the microprocessor (2) It is connected so that it can input the current power transmission status.

또한 마이크로 프로세서(2)의 또다른 입력단에는 가속도 센서(6)와, 도로의 구배정도를 인식하기 위한 유체 각도센서(8), 그리고 차속센서(10), 아이들 스위치(12) 및 스로틀 포지션 센서(14)가 전기적으로 연결되고 있다.In addition, another input of the microprocessor 2 has an acceleration sensor 6, a fluid angle sensor 8 for recognizing the degree of gradient of the road, and a vehicle speed sensor 10, an idle switch 12 and a throttle position sensor ( 14) is electrically connected.

이러한 신호를 입력받는 마이크로 프로세서(2)의 출력단에는 전기적으로 제어되는 솔레노이드 밸브(16)가 연결되어 마이크로 프로세서(2)의 제어동작에 따라 유압제어식 다판 클러치(18)로 유입되는 유체의 양을 조절할 수 있도록 되어 있다.An electrically controlled solenoid valve 16 is connected to an output end of the microprocessor 2 that receives such a signal to adjust the amount of fluid flowing into the hydraulically controlled multi-plate clutch 18 according to the control operation of the microprocessor 2. It is supposed to be.

제2도는 본 발명에 관련하는 4륜구동 차량의 동력전달 계통도로서, 엔진(20)으로 부터 동력을 전달받는 자동 변속기(22)와, 이 자동 변속리로 부터 나오는 회전동력을 전륜(24)으로 분배하는 전륜용 차동장치(26)와, 엔진의 동력을 후륜(28)으로 전달하기 위한 유압제어식 다판 클러치(30)를 포함하고 있으며, 이 클러치의 출력측이 후륜용 차동장치(32)를 통하여 후륜으로 동력을 전달할 수 있도록 되어 있다.FIG. 2 is a power transmission system diagram of a four-wheel drive vehicle according to the present invention. The automatic transmission 22 receives power from the engine 20 and distributes rotational power from the automatic transmission to the front wheels 24. A front wheel differential 26 and a hydraulically controlled multi-plate clutch 30 for transmitting engine power to the rear wheel 28, the output side of which is driven to the rear wheel via a rear wheel differential 32; It is intended to be delivered.

상기한 유압제어식 다판 클러치(30)는 자동 변속기(22)의 출력축(34)에 클러치 플레이트(36)가 다수개 끼워져 있다.In the hydraulically controlled multi-plate clutch 30, a plurality of clutch plates 36 are fitted to the output shaft 34 of the automatic transmission 22.

이들 클러치 플레이트(36)는 축방향으로 이동이 가능한 반면에 원주방향으로는 출력축(34)과 함게 회전할 수 있는 스풀라인 결합으로 장착된다.These clutch plates 36 are mounted in a spoolline combination that can be moved in the axial direction while being rotatable with the output shaft 34 in the circumferential direction.

상기한 클러치 플레이트(36)는 케이싱(38)내측면에 배치되어 함께 회전할 수 있는 클러치 압력 플레이트(40)와 1조씩 짝을 이루어 대향하는 자세로 위치하고 있다.The clutch plate 36 is disposed on the inner side of the casing 38 to be paired with the clutch pressure plate 40 which can be rotated together, and is positioned in opposing positions.

상기한 케이싱(38)는 추진축(42)과 연결되고 있는데, 솔레노이드 밸브(16)가 오일펌프(44)로 부터 공급되는 압력유체를 케이싱내로 적절히 공급할 수 있도록 되어 있다.The casing 38 is connected to the propulsion shaft 42, so that the solenoid valve 16 can properly supply the pressure fluid supplied from the oil pump 44 into the casing.

이와 같이 이루어지는 본 발명의 엔진동력 분배방법은, 제3도에 도시한 바와 같이 절환레버 스위치(4)로 부터 입력되는 신호를 검출하는 단계(100)와, 이 단계(100)의 신호검출을 근거로 하여 현재 상태가 2륜구동 상태인가를 판단하는 단계(100)로 제어가 시작된다.The engine power distribution method of the present invention thus made comprises a step (100) of detecting a signal input from the switching lever switch (4) as shown in FIG. 3, and based on the signal detection of the step (100). In step 100, it is determined whether the current state is the two-wheel drive state.

상기한 단계(110)에서 2륜구동 상태가 아니면, 즉 현재의 상태가 4륜구동 상태이면 솔레노이드 밸브(16)를 듀티제어하여 유압제어식 다판 클러치(30)로 공급되는 유압을 해제한다.If the step 110 is not in the two-wheel drive state, that is, if the current state is a four-wheel drive state duty control the solenoid valve 16 to release the hydraulic pressure supplied to the hydraulically controlled multi-plate clutch 30.

그러나 단계(110)의 독출값이 2륜구동 상태이면, 단계(120)에서 유체 각도센서(8)로 부터 입력되는 신호를 판단하여 도로의 구배정도를 인식하게 된다.However, if the readout value of step 110 is a two-wheel drive state, in step 120, the signal input from the fluid angle sensor 8 is determined to recognize the degree of gradient of the road.

그리고 다음 단계(130)에서 오르막 길 경사로 주행중인가를 판단하게 되는데, 이때 오르막길 경사로 주행이 아니면 클러치를 해방하게 되고 오르막 길 경사로 주행상태이면 다음 단계(140)에서 아이들 스위치(12)가 오프 상태인가를 판단하게 된다.Then, it is determined whether the vehicle is traveling on the uphill road at the next step 130. At this time, if the vehicle is not running uphill, the clutch is released. You will be judged.

이때 아이들 스위치가 오프 상태가 아이면 클러치를 해방하게 되는데, 아이들 스위치가 오프상태이면 가속도 센서(6)로 부터 입력되는 신호를 독출하여(단계 150) 급 조향로인가를 단계(16)에서 판단하게 된다.At this time, when the idle switch is in the off state, the clutch is released. If the idle switch is in the off state, the signal input from the acceleration sensor 6 is read (step 150) to determine whether it is a steer road in step 16. do.

이러한 단계를 수행하면서 급 조향상태로 판단되면, 솔레노이드 밸브(16)르 듀티제어하여 (단계 170) 유압제어식 다판 클러치(30)를 작동시키게 된다.When it is determined that the steer steering state is performed while performing such a step, the solenoid valve 16 is duty-controlled (step 170) to operate the hydraulically controlled multi-plate clutch 30.

상기한 단계(170)의 제어는 듀티제어로서, 듀티율에 따라 오일펌프(44)에서 생성되는 압력 유체를 클러치의 케이싱(38)내로 공급하게 된다.The control of step 170 is duty control, which supplies the pressure fluid generated in the oil pump 44 into the casing 38 of the clutch according to the duty rate.

따라서 튜티율이 80% 정도이면 엔진의 동력이 80%정도 후륜(28)으로 전달되고, 전륜(24)으로는 20% 정도 전달되므로 특히 경사로에서 등판능력을 향상시킬 수 있다.Therefore, when the duty ratio is about 80%, the power of the engine is transmitted to the rear wheels 28 by about 80%, and about 20% is transmitted to the front wheels 24, so it is possible to improve the climbing capacity, especially on a ramp.

이러한 듀티제어는 듀티율에 따라 전후륜의 동력전달을 결정하게 되므로 전후륜의 동력 전달율을 50%로 동일하게 할 수 있으며, 또 그 이하로 할 수도 있다.This duty control determines the power transmission of the front and rear wheels according to the duty ratio, so that the power transmission rate of the front and rear wheels can be equal to 50%, or less.

이와 같이 본 발명에 의한 엔진동력 분배방법은, 도로여건에 따라 엔진의 동력을 전후륜에 적절히 분배할 수 있기 때문에 경사로 주행시 운전성능을 향상시킬 수 있으며, 급 가속시 접지력이 작기 때문에 발생하는 슬립현상을 방지할 수 있고, 경사로 선회시에도 오버 스티어링을 방지할 수 있는 효과가 있다.As described above, the engine power distribution method according to the present invention can improve the driving performance when driving on a slope because the engine power can be properly distributed to the front and rear wheels according to the road conditions, and the slip phenomenon generated due to the low traction force during rapid acceleration. It is possible to prevent, and even when turning the slope there is an effect that can prevent over steering.

Claims (2)

2륜구동과 4륜구동의 선택을 감지하는 절환레버 스위치로 현재의 구동상태를 판단하는 단계와, 오르막 길 경사로 주행인 가를 판단하는 단계와, 아이들 스위치가 오프 상태인가를 판단하는 단계와, 급 조향상태인가를 판단하는 단계를 포함하여 이루어지며, 상기한 단계들이 조건을 만족하면 솔레노이드 밸브를 듀티제어하여 유입제어식 다판 클러치를 작동시키는 4륜구동 자동 변속차량의 엔진동력 분배방법.Judging the current driving state with a switching lever switch that detects the selection of two-wheel drive and four-wheel drive, determining whether the vehicle is driving uphill, and determining whether the idle switch is in the off state; The engine power distribution method of the four-wheel drive automatic transmission vehicle comprising the step of determining the application, and if the above steps are satisfied, the duty control of the solenoid valve to operate the inflow-controlled multi-plate clutch. 제1항에 있어서, 절환레버 스위치 신호가 4륜 구동으로 독출되면 유입제어식 다판 클러치의 작동을 해지하는 4륜구동 자동 변속차량의 엔진동력 분배방법.2. The method of claim 1, wherein the switching lever switch signal is canceled by four-wheel drive to cancel operation of the inflow-controlled multi-plate clutch.
KR1019940026129A 1994-10-12 1994-10-12 Method of distributing engine power in 4 wheel drive car KR100188748B1 (en)

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KR100282880B1 (en) * 1997-10-31 2001-03-02 정몽규 Front and rear wheel drive force distribution device of 4 wheel drive vehicle
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