KR100293662B1 - Hydraulic control system of continuously variable transmission for vehicle - Google Patents

Hydraulic control system of continuously variable transmission for vehicle Download PDF

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KR100293662B1
KR100293662B1 KR1019970051970A KR19970051970A KR100293662B1 KR 100293662 B1 KR100293662 B1 KR 100293662B1 KR 1019970051970 A KR1019970051970 A KR 1019970051970A KR 19970051970 A KR19970051970 A KR 19970051970A KR 100293662 B1 KR100293662 B1 KR 100293662B1
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South Korea
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valve
pressure
hydraulic
solenoid
hydraulic pressure
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KR1019970051970A
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Korean (ko)
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KR19990031314A (en
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장재덕
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이계안
현대자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4035—Control of circuit flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4043—Control of a bypass valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4096—Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0037—Generation or control of line pressure characterised by controlled fluid supply to lubrication circuits of the gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F16H2061/0253—Details of electro hydraulic valves, e.g. lands, ports, spools or springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
    • F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • F16H2061/026—On-off solenoid valve

Abstract

PURPOSE: A hydraulic control system for a continuously variable transmission of a vehicle is provided to protect a frictional member, and to prevent shift shock by preventing hydraulic pressure from being supplied to the frictional member suddenly in converting into the reverse range during traveling forward. CONSTITUTION: A hydraulic control system of a continuously variable transmission in a vehicle is composed of a pressure control unit having a primary line pressure regulating valve(4), a first solenoid valve, a second pressure regulating valve(6) and a solenoid supply valve(8); a transmission control unit having a transmission gear ratio control valve(10), and a second solenoid valve(S2); a forward and backward movement control unit having a pressure control valve(14), a third solenoid valve(S3), a manual valve(16), and first and second frictional members(C,B); a torque converter control unit having a torque converter feed valve receiving hydraulic pressure from the pressure control unit, and a lockup clutch valve and a fourth solenoid valve(S4); and a safety unit controlled by operational pressure in the backward pressure pipe connecting the manual valve to the second frictional members. The frictional member is protected, and shift shock is reduced with preventing hydraulic pressure from being supplied suddenly in shifting to the reverse range suddenly.

Description

자동차용 무단 변속기의 유압 제어 시스템Hydraulic control system of continuously variable transmission for automobile

본 발명은 자동차용 무단 변속기의 유압 제어 시스템에 있어서, 전진 주행중 운전자의 실수로 후진으로 변환이 이루어졌을 때 후진시 작동되는 마찰부재를 보호하고, 그 충격을 방지할 수 있도록 한 유압 제어 시스템에 관한 것이다.The present invention relates to a hydraulic control system for a continuously variable transmission for a vehicle, the hydraulic control system for protecting the friction member to be operated when the reverse when the reverse conversion is made by the driver during the forward driving to prevent the impact. will be.

예컨데, 차량의 변속장치는 엔진의 구동력을 구동륜에 전달하는 기능을 갖고 있는데, 이러한 변속장치에는 운전자의 의지대로 운전자가 직접 변속단을 선택하는 수동 변속기와, 차량의 주행 조건에 따라 자동적으로 변속이 이루어지는 자동 변속기와, 각 변속단 사이에 특정한 변속 영역이 없이 무단으로 연속적인 변속이 이루어지는 무단 변속기로 대별된다.For example, the transmission of the vehicle has a function of transmitting the driving force of the engine to the driving wheels, which includes a manual transmission in which the driver directly selects a shift stage at the driver's will, and automatically shifts according to the driving conditions of the vehicle. It is divided into the automatic transmission which is made, and the continuously variable transmission in which continuous transmission is continuously performed without a specific speed change area between each transmission stage.

상기와 같은 변속기에 있어서, 본 발명은 유압을 이용하는 자동 변속장치의 단점을 보완하여 연비 및 동력 전달 성능, 그리고 중량면에서 큰 장점을 갖는 무단 변속이에 관계하며, 이의 무단 변속장치는 입력축과 출력축에 장착되는 풀리의 직경변위를 이용하는 방식이 주로 사용되고 있다.In the transmission as described above, the present invention relates to a continuously variable transmission having a great advantage in terms of fuel economy, power transmission performance, and weight by supplementing the disadvantages of the automatic transmission using hydraulic pressure, the continuously variable transmission thereof has an input shaft and an output shaft The method using the diameter displacement of the pulley mounted on the is mainly used.

이러한 벨트식 무단 변속기를 운용할 수 있는 유압 제어 시스템의 구성을 살펴보면 도 5에서와 같이, 오일펌프(2)로부터 공급되는 유압을 조절하는 프라이머리 라인압 조절밸브(4)와, 제1 솔레노이드 밸브(S1)와, 세컨들리 조절밸브(6)와, 솔레노이드 서플라이 밸브(8)로 이루어지는 압력조절수단과;Looking at the configuration of the hydraulic control system that can operate such a belt continuously variable transmission as shown in Figure 5, the primary line pressure regulating valve (4) for adjusting the hydraulic pressure supplied from the oil pump (2), and the first solenoid valve Pressure regulating means (S1), a secondary control valve (6), and a solenoid supply valve (8);

변속비 컨트롤 밸브(10)와, 이의 밸브(12)을 제어하는 제2 솔레노이드 밸브(S2)로 이루어지느 변속제어수단과;Shift control means comprising a speed ratio control valve 10 and a second solenoid valve S2 for controlling the valve 12 thereof;

압력제어밸브(14)와, 이의 밸브(14)를 제어하는 제3 솔레노이드 밸브(S3)와, 매뉴얼 밸브(16)와, 그리고 전, 후진의 작동요소인 제1,2 마찰요소(C)(B)로 이루어지는 전, 후진 제어수단과;The pressure control valve 14, the third solenoid valve S3 for controlling the valve 14 thereof, the manual valve 16, and the first and second friction elements C which are operating elements of the forward and backward directions ( B, forward and reverse control means;

상기 압력조절수단으로부터 유압을 공급받는 토오크 컨버터 피이드 밸브(18)와, 록-업 클러치 컨트롤 밸브(20)와, 이의 밸브(20)를 제어하는 제4 솔레노이드 밸브(S4)로 이루어지는 토오크 컨버터 동작 제어수단으로 이루어진다.Torque converter feed control valve 18, which is supplied with hydraulic pressure from the pressure regulating means, lock-up clutch control valve 20, and torque converter operation control consisting of a fourth solenoid valve (S4) for controlling the valve 20 thereof By means of

이에 따라 오일펌프(2)로부터 압송되는 유압은 프라이머리 라인압 조절밸브(4)를 통해 라인압이 1차적으로 조절되어 세컨들이 압력조절밸브(4)와 무단 변속기구의 세컨들이 풀리(22)로 공급되며, 상기 세컨들리 압력조절밸브(4)에서는 1차로 조절된 유압을 다시 2차로 조절하여 솔레노이드 서플라이 밸브(8)과 변속제어수단 및 전, 후진 제어수단과 토오크 컨버터 동작 제어수단으로 공급된다.Accordingly, the hydraulic pressure pumped from the oil pump 2 is primarily adjusted in the line pressure through the primary line pressure regulating valve 4, so that the second to the pressure regulating valve 4 and the second transmission mechanism to the pulley 22 are operated. The secondary pressure regulating valve 4 is supplied to the solenoid supply valve 8, the shift control means, and the forward and reverse control means and the torque converter operation control means by regulating the hydraulic pressure firstly adjusted to the second again.

그리고 상기 솔레노이드 서플라이 밸브(8)로 공급된 유압은 다시 각각의 솔레노이드 밸브(S1)(S2)(S3)(S4)로 분배 공급이 이루어지게 되며, 변속제어수단의 변속비 컨트롤 밸브(10)로 공급된 유압은 제2 솔레노이드 밸브(S2)의 제어에 따라 무단 변속기구인 프라이머리 풀리(24)으로 공급되어 이들 풀리의 직경 가변에 의한 무단 변속이 이루어지게 한다.Then, the hydraulic pressure supplied to the solenoid supply valve 8 is again distributed to each solenoid valve S1, S2, S3, and S4, and is supplied to the speed ratio control valve 10 of the shift control means. The hydraulic pressure is supplied to the primary pulley 24, which is a continuously variable transmission mechanism under the control of the second solenoid valve S2, so that the variable speed of the pulleys can be achieved by varying the diameters of the pulleys.

또한, 전,후진 제어수단의 압력조절밸브(14)로 공급된 유압은 제3 솔레노이드 밸브(S3)의 제어에 따라 매뉴얼 밸브(16)로 공급되어 운전자의 셀렉터 레터 조작에 따라 전,후진압 관로(26)(28)로 선택 공급되어 전진 주행시 작동되는 제1 마찰부태(C)와, 후진 주행시 작동되는 제2 마찰부재(B)로 공급된다.In addition, the hydraulic pressure supplied to the pressure regulating valve 14 of the forward and backward control means is supplied to the manual valve 16 under the control of the third solenoid valve S3, and the forward and backward pressure pipelines are operated according to the operator's selector letter operation. It is supplied to (26) and (28), and is supplied to the 1st friction part C which operates at the time of forward drive, and the 2nd friction member B which operates at the time of backward driving.

그리고 토오크 컨버터 동작 제어수단의 토오크 컨버터 피이드 밸브(18)의 유로변화에 따라 다순히 제1 마찰부재(C) 또는 제2 마찰부재(B)가 선택적으로 작용할 수 있도록 구성되어 있는 바, 운전자의 실수로 인하여 전진 주행중(대략 8JM/H 이상) 후진으로 셀렉트 레버를 변환하는 경우에 급작스럽게 후진 마찰요소인 제2 마찰부재(B)로 유입되는 유압을 억제할 수가 없었다.And the first friction member (C) or the second friction member (B) is configured to selectively act according to the flow path change of the torque converter feed valve 18 of the torque converter operation control means, the driver's mistake Because of this, when the select lever was changed to the reverse direction while driving forward (approximately 8 JM / H or more), the hydraulic pressure flowing into the second friction member B, which is the reverse friction element, could not be suppressed suddenly.

즉, 전진 주행중에 제1 마찰부재로 공급되던 유압이 셀렉트 레버의 레인지 변환으로 갑자기 제2 마찰부재로 공급되는 것을 막을 수가 없었다.That is, the hydraulic pressure supplied to the first friction member during the forward travel could not be prevented from suddenly being supplied to the second friction member due to the range change of the select lever.

이에 따라 후진시 작동되는 제2 마찰부재는 손상되고, 그 충격이 심하게 발생되어 운전자에게 불안가을 준다는 문제점을 내포하고 있었다.Accordingly, the second friction member operated when reversing is damaged, and the impact is severely generated, which may cause anxiety to the driver.

따라서 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명된 것으로서, 본 발명의 목적은 전진 주행중 운전자의 실수로 후진으로 변환이 이루어졌을 때 후진시 작동되는 마찰부태를 보호하고, 그 충격을 방지할 수 있도록 한 유압 제어 시스템을 제공함에 있다.Therefore, the present invention has been invented to solve the above problems, the object of the present invention is to protect the frictional state that is operated when reversing when the driver's mistake is converted to the reverse while driving forward, and can prevent the impact To provide a hydraulic control system.

이를 실현하기 위하여 본 발명은 오일펌프로부터 공급되는 유압을 조절하는 프라이머리 라인압 조절밸브와, 제1 솔레노이드 밸브와, 세컨들리 압력조절밸브와, 솔레노이드 서플라이 밸브로 이루어지는 압력조절수단과;In order to realize this, the present invention provides a pressure regulating means comprising a primary line pressure regulating valve for regulating hydraulic pressure supplied from an oil pump, a first solenoid valve, a secondary pressure regulating valve, and a solenoid supply valve;

변속비 컨트롤 밸브와, 이의 밸브를 제어하는 제2 솔레노이드 밸브로 이루어지느 변속제어수단과;Shift control means comprising a speed ratio control valve and a second solenoid valve controlling the valve thereof;

압력제어밸브와, 이의 밸브를 제어하는 제3 솔레노이드 밸브와, 매뉴얼 밸브와, 그리고 전, 후진의 작동요소인 제1,2 마찰요소로 이루어지는 전, 후진 제어수단과;Forward and backward control means comprising a pressure control valve, a third solenoid valve controlling the valve thereof, a manual valve, and first and second friction elements which are forward and backward actuating elements;

상기 압력조절수단으로부터 유압을 공급받는 토오크 컨버터 피이드 밸브와, 록-업 클러치 밸브와, 이의 밸브를 제어하는 제4 솔레노이드 밸브로 이루어지는 토오크 컨버터 동작제어수단을 포함하며,A torque converter operation control means comprising a torque converter feed valve supplied with hydraulic pressure from the pressure regulating means, a lock-up clutch valve, and a fourth solenoid valve controlling the valve thereof;

상기 전,후진 제어수단의 매뉴얼 밸브와 후진 작동요소인 제2 마찰부재를 연결하는 후진압 관로상에 전진 작동압에 의하여 제어되는 안전수단을 더욱 포함하여 이루어지는 자동차용 무단 변속기의 유압 제어 시스템을 제공한다.It provides a hydraulic control system of a continuously variable transmission for a vehicle further comprising a safety means controlled by the forward operating pressure on the reverse pressure pipe connecting the manual valve of the forward and backward control means and the second friction member that is the reverse operation element. do.

도 1은 본 발명에 의한 유압 제어 시스템에 있어서 중립(N) 레인지에서의 유압 흐름도.1 is a flow chart of hydraulic pressure in a neutral (N) range in the hydraulic control system according to the present invention.

도 2는 본 발명에 적용되는 안전수단의 구성도.2 is a block diagram of a safety means applied to the present invention.

도 3은 전진(D) 레인지에서의 유압 흐름도.3 is a flow chart of hydraulic pressure in the advance (D) range.

도 4는 후진(R) 레인지에서의 유압 흐름도.4 is a flow chart of hydraulic pressure in the reverse (R) range.

도 5는 종래 유압 제어 시스템의 구성이다.5 is a configuration of a conventional hydraulic control system.

이하, 상기의 목적을 구체적으로 실현할 수 있는 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

도 1은 본 발명에 의한 유압 제어 시스템의 구성도로서, 벨트식 무단 변속기를 운용하기 위한 유압 제어 시스템은 상기한바와 같이, 압력조절수단에서는 오일 펌프(2)로부터 압송되는 유압은 프라이머리 라인압 조절밸브(4)를 통해 라인압이 1차적으로 조절되어 세컨들리 압력조절밸브(6)와 무단 변속기구의 세컨들리 풀리(22)로 공급되며, 상기 세컨들리 압력조절밸브(6)에서는 1차로 조절된 유압을 다시 2차로 조절하여 솔레노이드 서플라이 밸브(8)와 변속제어수단 및 전,후진 제어수단과 토오크 컨버터 동작 제어수단으로 공급된다.1 is a configuration diagram of a hydraulic control system according to the present invention, the hydraulic control system for operating the belt-type continuously variable transmission as described above, in the pressure regulating means is the hydraulic pressure pumped from the oil pump (2) is the primary line pressure The line pressure is primarily regulated through the control valve (4) and supplied to the secondary pressure control valve (6) and the secondary pulley (22) of the continuously variable transmission mechanism. The secondary pressure control valve (6) controls the primary pressure. The secondary hydraulic pressure is again adjusted to be supplied to the solenoid supply valve 8, the shift control means, and the forward and reverse control means and the torque converter operation control means.

그리고 상기 솔레노이드 서플라이 밸브(8)로 공급된 유압은 다시 각각의 솔레노이드 밸브(S1)(S2)(S3)(S4)로 분배 공급외 이루어지게 되며, 변속제어수단의 변속비 컨트롤 밸브(10)로 공급된 유압은 제2 솔레노이드 밸브(S2)의 제어에 따라 무단 변속기구인 프라이머리 풀리(24)으로 공급되어 이들 풀리의 직경 가변에 의한 무단 변속이 이루어지게 한다.Then, the hydraulic pressure supplied to the solenoid supply valve 8 is again distributed to each solenoid valve S1, S2, S3, and S4, and is supplied to the speed ratio control valve 10 of the shift control means. The hydraulic pressure is supplied to the primary pulley 24, which is a continuously variable transmission mechanism under the control of the second solenoid valve S2, so that the variable speed of the pulleys can be achieved by varying the diameters of the pulleys.

또한, 전,후진 제어수단의 압력조절밸브(14)로 공급된 유압은 제3 솔레노이드 밸브(S3)의 제어에 따라 매뉴얼 밸브(16)로 공급되어 운전자의 셀렉터 레버 조작에 따라 전, 후 진압 관로(26)(28)로 선택 공급되어 전진 주행시 작동되는 제1 마찰부재(C)와, 후진 주행시 작동되는 제2 마찰부재(B)로 공급된다.In addition, the hydraulic pressure supplied to the pressure regulating valve 14 of the forward and backward control means is supplied to the manual valve 16 under the control of the third solenoid valve S3, and the forward and backward suppression pipes are operated according to the driver's selector lever operation. It is supplied to (26) and (28), and is supplied to the 1st friction member (C) operated at the time of forward driving, and the 2nd friction member (B) operated at the time of backward driving.

그리고 토오크 컨버터 동작 제어수단의 토오크 컨버터 피이드 밸브(18)로 공급된 유압은 이의 밸브(18)에서 안정되에 제어되어 록-업 클러치 컨트롤 밸브(18)로 공급되며, 이에 공급된 유압은 제4 솔레노이드 밸브(S4)의 제어에 따라 토오크 컨버터 또는 윤활개소로 공급된다.The hydraulic pressure supplied to the torque converter feed valve 18 of the torque converter operation control means is stably controlled at the valve 18 thereof, and is supplied to the lock-up clutch control valve 18. It is supplied to the torque converter or the lubrication point under the control of the solenoid valve S4.

또한, 상기 전,후진압 관로(26)_(28)상에는 어큐믈레이터(30)(32)을 각각 설치하여 제1, 2 마찰부재(C)(B)의 작동이 안정되도록 하였으며, 바이패스 관로(34)(36)를 형성하여 이에 유압 해제시 유로를 개방하는 CPR 밸브(38)(40)을 각각 배치하여 해제압이 신속하게 배출될 수 있도록 하고 있다.In addition, the accumulators (30) and (32) are installed on the front and rear pressure pipelines (26) _ (28), respectively, to stabilize the operation of the first and second friction members (C) and (B). The CPR valves 38 and 40 are formed to form the conduits 34 and 36 so as to open the flow path at the time of hydraulic release, so that the release pressure can be quickly discharged.

이와 같은 유압 제어 시스템에 있어서, 본 발명은 후진압 관로(28)의 바이패스 관로(36) 합류 부위에 안전수단으로 안전밸브(50)을 배치하였다.In the hydraulic control system as described above, the present invention arranges the safety valve 50 as a safety means at the confluence of the bypass pipeline 36 of the reverse pressure pipeline 28.

이의 안전밸브(50)는 도2에서와 같이, 밸브보디에 후진압 관로(28)와 바이패스 관로(36)에 연통되는 제1,2포트(52)(54)와, 상기 제1포트(52)로 유입되는 유압을 제2 마찰부재(B)로 공급하는 제3포트(56)와, 전진압 관로(26)와 연통되는 제4포트(58)와, 배출포트(EX)를 보유한다.The safety valve 50 thereof, as shown in Figure 2, the first and second ports 52 and 54, which communicate with the reverse pressure line 28 and the bypass line 36 to the valve body, and the first port ( And a third port 56 for supplying hydraulic pressure flowing into the second friction member B to the second friction member B, a fourth port 58 in communication with the forward pressure pipeline 26, and a discharge port EX. .

그리고 상기 밸브보디에 내장되는 밸브스풀은 일측으로 탄발부재(60)가 탄지되며, 배출포트(EX)를 개폐하는 제1랜드(62)와, 일측면에 전진압 관로(26)의 유압이 작용하며 선택적으로 제1포트(52)를 개폐하는 제2팬드(64)를 보유하게 된다.In addition, the valve spool embedded in the valve body has a carbon member 60 held on one side, the first land 62 for opening and closing the discharge port EX, and the hydraulic pressure of the forward pressure pipeline 26 on one side. And optionally has a second pan 64 for opening and closing the first port 52.

이에 따라 중립 레인지에서는 도 1에서와 같이, 전,후진 압이 매뉴얼 밸브(16)에서 차단되는 바, 안전밸브(50)는 아무런 작동이 이루어지지 않는다.Accordingly, in the neutral range, as shown in FIG. 1, the forward and backward pressures are cut off from the manual valve 16, and the safety valve 50 is not operated at all.

그리고 전진 레인지에서는 도 3에서와 같이, 전진압 관로(26)를 통해 제1 마찰요소(C)로 유압이 공급되면서 전진압의 일부가 안전밸브(50)의 제4포트(58)로 유입되어 밸크스풀의 제2랜드(64)에 작용하게 된다.In the forward range, as shown in FIG. 3, while the hydraulic pressure is supplied to the first friction element C through the forward pressure pipeline 26, a part of the forward pressure flows into the fourth port 58 of the safety valve 50. It acts on the second land 64 of the spool.

그러면 밸브스풀은 도면에서 좌측으로 이동하여 제2랜드(64)가 제1포트(52)를 폐쇄한 상태를 유지하게 된다.Then, the valve spool moves to the left in the figure to maintain the state in which the second land 64 closes the first port 52.

그리고 상기와 반대로 운전자가 후진을 위하여 후진 레인지로 변환하면, 도 4에서와 같이, 매뉴얼 밸브(160에서 압력조절밸브(14)로부터 공급되는 유압을 후진압 관로(28)를 통해 제2 마찰부재(B)로 공급하게 되는데, 이때 안전밸브(50)는 밸브스풀을 좌측으로 밀어주는 전진압이 해제된 상태이므로 탄발부재(60)의 탄발력에 의하여 우측으로 이동하게 되므로 제1,3포트(52)(56)가 연통되어 유압을 제1 마찰부재(B)로 공급함으로서, 후진 주행이 가능해진다.In contrast to the above, when the driver converts to the reverse range for the reverse, as shown in FIG. 4, the hydraulic pressure supplied from the pressure regulating valve 14 in the manual valve 160 is transferred to the second friction member through the reverse pressure pipeline 28. B), but the safety valve 50 is moved to the right side by the elastic force of the bullet member 60 because the forward pressure for pushing the valve spool to the left is released, the first and third ports 52 (56) is in communication with each other to supply the hydraulic pressure to the first friction member (B), it is possible to travel backward.

이에 따라 본 발명의 유압 제어 시스템에 의하면, 제1 마찰부재(C)가 작동하는 도중에는 제1 마찰부재(B)로 유압이 공급될 수 없게 되는 바, 운전자의 실수로 인하여 후진 레인지로 변환이 이루어지는 경우 급작스럽게 제2 마찰부재(B)로 유압이 공급되지 않는다.Accordingly, according to the hydraulic control system of the present invention, the hydraulic pressure cannot be supplied to the first friction member B while the first friction member C is operating. In this case, the hydraulic pressure is not supplied to the second friction member B suddenly.

즉, 전진 주행중에는 전진압 관로(26)의 유압이 안전밸브(50)에 작용하여 후진압 관로(26)를 폐쇄하고, 이의 상태에서 후진 레인지로의 급작스런 변환이 이루어져 매뉴얼 밸브(16)로부터 유압이 후진압 관로(28)로 공급되더라도 전진압 관로(26)의 유압이 해제되어야만 안전밸브(50)의 밸브스풀 이동에 의하여 제1,3 포트(52)(56)가 연통되기 때문이다.That is, during the forward driving, the hydraulic pressure of the forward pressure pipeline 26 acts on the safety valve 50 to close the reverse pressure pipeline 26, and in this state, a sudden change to the reverse range is performed and the hydraulic pressure from the manual valve 16 is changed. This is because the first and third ports 52 and 56 communicate with each other by the valve spool movement of the safety valve 50 only when the hydraulic pressure of the forward pressure pipeline 26 is released even when supplied to the reverse pressure pipeline 28.

따라서 전진 주행중 후진 레인지로의 변환시 제1 마찰부태(C)의 작동압이 해제되면서 서서히 제2 마찰요소(B)로 유압이 공급되는 바, 제2 마찰부재(B)의 손상이나 변속 충격이 발생을 방지할 수 있게 되는 것이다.Therefore, the hydraulic pressure is gradually supplied to the second friction element B while the operating pressure of the first friction part C is released during the conversion to the reverse range while driving forward, and damage or shift shock of the second friction member B occurs. Will be able to prevent.

이상에서와 같이 본 발명에 의하면, 전진 주행중 운전자의 실수로 후진으로 변환이 이루어졌을 때 후진시 작동되는 마찰부재로의 급작스런 유압 공급을 방지하여 이의 마찰부재를 보호하고, 이에 따른 변속 충격을 방지할 수 있는 발명인 것이다.As described above, according to the present invention, when the driver's mistake is converted to the reverse during the forward driving, to prevent the sudden hydraulic supply to the friction member that operates when the reverse to protect its friction member, thereby preventing the shifting shock It is an invention that can be.

Claims (2)

오일펌프로부터 공급되는 유압을 조절하는 프라이머리 라이압 조절밸브와, 제1 솔레노이드 밸브와, 세컨들이 압력조절밸브와, 솔레노이드 서플라이 밸브로 이루어지는 압력조절수단과;A pressure regulating means comprising a primary pressure regulating valve for regulating hydraulic pressure supplied from an oil pump, a first solenoid valve, a second pressure regulating valve, and a solenoid supply valve; 변속비 컨트롤 밸브와, 이의 밸브를 제어하는 제2 솔레노이드 밸브로 이루어지는 변속제어수단과;Shift control means comprising a speed ratio control valve and a second solenoid valve controlling the valve thereof; 압력제어밸브와, 이의 밸브를 제어하는 제3 솔레노이드 밸브와, 매뉴얼 밸브와, 그리고 전,후진의 작동요소인 제1,2 마찰요소로 이루어지는 전,후진 제어수단과;Forward and backward control means comprising a pressure control valve, a third solenoid valve for controlling the valve, a manual valve, and first and second friction elements which are forward and backward operating elements; 상기 압력조절수단으로부터 유압을 공급받는 토오크 컨버터 피이드 밸브와, 록-업 클러치 컨트롤 밸브와, 이의 밸브를 제어하느 S제4 솔레노이드 밸브로 이루어지는 토오크 컨버터 동작제어수단을 포함하여 이루어지되,Torque converter feed valve receiving the hydraulic pressure from the pressure regulating means, a lock-up clutch control valve, and the torque converter operating control means consisting of the S fourth solenoid valve for controlling the valve, 상기 전,후진 제어수단의 전진압의 작용시 후진압의 공급을 방지하도록, 후진압 관로의 바이패스 관로 합류 부위에 배치되는 안전밸브를 더욱 포함하여 이루어지는 것을 특징으로 하는 자동차용 무단 변속기의 유압 제어 시스템.Hydraulic control of the continuously variable transmission for a vehicle, characterized in that further comprising a safety valve disposed at the confluence of the bypass line of the reverse pressure line to prevent the supply of reverse pressure when the forward and reverse control means acts. system. 청구항1에 있어서, 상기 안전밸브는 후진압 관로와 파이패스 관로에 연통되는 제1,2포트와, 상기 제1포트로 유입되는 유압을 제2 마찰부재로 공급하는 제3포트와, 전진압 관로와 연통되는 제4포트와, 배출포트를 보유하는 밸브보디와;The safety valve of claim 1, wherein the safety valve includes first and second ports communicating with the reverse pressure pipeline and the pipe passage, a third port for supplying hydraulic pressure flowing into the first port to the second friction member, and a forward pressure pipeline. A valve body having a fourth port in communication with the discharge port; 일측으로 탄발부재가 탄지되며, 배출포트를 개폐하는 제1랜드와, 일측면에 전진압 관로의 유압이 작용하며 선택적으로 제1포트를 개폐하는 제2랜드를 보유하는 밸브스풀과;A valve spool having a first member for holding and discharging the discharge port on one side, and a second land for actuating hydraulic pressure of the forward pressure pipe on one side and selectively opening and closing the first port; 를 포함하여 이루어지는 자동차용 무단 변속이의 유압 제어 시스템.Hydraulic control system of a continuously variable vehicle for comprising a.
KR1019970051970A 1997-10-10 1997-10-10 Hydraulic control system of continuously variable transmission for vehicle KR100293662B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214333A (en) * 2013-05-31 2014-12-17 通用汽车环球科技运作有限责任公司 Hydraulic control system for a continuously variable transmission

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214333A (en) * 2013-05-31 2014-12-17 通用汽车环球科技运作有限责任公司 Hydraulic control system for a continuously variable transmission

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