KR100401600B1 - Shift control method of automatic transmission - Google Patents

Shift control method of automatic transmission Download PDF

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Publication number
KR100401600B1
KR100401600B1 KR1019960063624A KR19960063624A KR100401600B1 KR 100401600 B1 KR100401600 B1 KR 100401600B1 KR 1019960063624 A KR1019960063624 A KR 1019960063624A KR 19960063624 A KR19960063624 A KR 19960063624A KR 100401600 B1 KR100401600 B1 KR 100401600B1
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South Korea
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vehicle
deceleration
reference value
set reference
throttle valve
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KR1019960063624A
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Korean (ko)
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KR19980045441A (en
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서정재
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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
    • F16H61/02—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
    • F16H61/0204—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0213—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
    • 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
    • F16H61/0204—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0213—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 for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
    • F16H2061/0227—Shift map selection, i.e. methods for controlling selection between different shift maps, e.g. to initiate switch to a map for up-hill driving
    • 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
    • F16H61/21—Providing engine brake control
    • F16H2061/213—Providing engine brake control for emergency braking, e.g. for increasing brake power in emergency situations

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

PURPOSE: A shift control method of an automatic transmission is provided to shorten a stop distance of a vehicle in traveling on a downhill road or executing quick braking action during traveling at low speed. CONSTITUTION: A shift control method of an automatic transmission comprises steps of deciding whether the current opening degree of a throttle valve is smaller than the set reference opening degree of the throttle valve in traveling on a downhill road or executing quick braking action while a vehicle travels in a speed range of 1-speed or 2-speed among D-ranges(S100); calculating and outputting driver's deceleration according to the vehicle speed and the state of an accelerator pedal switch and deciding whether the output deceleration of the vehicle is larger than a first set reference value if the current opening degree of the throttle valve is smaller than the set reference opening degree(S110); and outputting a control signal for forming a passage to change a speed range to an L-range if the deceleration of the vehicle is larger than the first set reference value(S120). The shift control method comprises steps of deciding whether the deceleration of the vehicle is larger than a second set reference value if the deceleration of the vehicle is smaller than the first set reference value(S111), and outputting a control signal for forming the passage to change the speed range to the L-range if the deceleration of the vehicle is larger than the second set reference value.

Description

자동 변속기의 변속 제어방법Shift control method of automatic transmission

본 발명은 자동 변속기의 변속 제어방법에 관한 것으로서, 더욱 상세하게는 차량을 D레인지의 주행모드에서 1속 또는 2속 주행중 내리막길 또는 급브레이크 작동시 거리 단축 및 엔진 브레이크 작동을 위해 변속단을 L레인지 위치의 유도로 형성하기 위한 자동 변속기의 변속 제어방법에 관한 것이다.The present invention relates to a shift control method of an automatic transmission, and more particularly, to reduce the distance during downhill road or rapid brake operation while driving the vehicle in the driving mode of the D-range, and the gear shift stage L for the engine brake operation. A shift control method of an automatic transmission for forming by induction of a range position.

일반적으로 자동 변속기가 장착되어 있는 자동차는, 자동차의 주행 속도에 따라 설정되어 있는 변속 범위 안에서 유압을 제어하여 자동으로 목표 변속단의 변속 기어가 동작될 수 있도록 한다.In general, a vehicle equipped with an automatic transmission controls the hydraulic pressure within a shift range set according to the driving speed of the vehicle so that the shift gear of the target shift stage may be automatically operated.

그러므로 엔진(engine)의 출력 동력에 따라 토크 컨버터(torque converter)를 동작시켜 유체의 회전력을 제어하고, 자동차의 동작 상태에 따른 해당 변속 기어가 동작될 수 있도록 변속 제어장치에서 인가되는 제어 신호에 따라 해당 밸브로 유압이 작용하여 변속동작이 이루어질 수 있도록 한다.Therefore, the torque converter is operated according to the output power of the engine to control the rotational force of the fluid, and according to the control signal applied from the shift controller so that the shift gear according to the operating state of the vehicle can be operated. Hydraulic pressure acts on the valve to allow shifting.

따라서 유압에 따라 동작 상태가 제어되는 자동 변속기가 장착된 자동차는, 해당하는 변속 기어의 동작 상태를 가변시키기 위해 엔진과의 동력을 차단시키는 클러치 페달(clutch pedal)의 동작이 필요하지 않으므로 운전자의 운전 피로를 경감시킬 수 있고, 주행중 운전자의 오동작이나 운전미숙 등으로 인한 엔진 스톨(engine stall)이 발생하지 않으므로 초보자일 경우에도 운전 동작을 용이하게 할 수 있다.Therefore, a vehicle equipped with an automatic transmission in which the operating state is controlled according to the hydraulic pressure does not require the operation of a clutch pedal to cut off power from the engine in order to change the operating state of the corresponding shift gear. Fatigue can be reduced, and an engine stall is not generated due to a malfunction of the driver or an immature driving during driving, so that even a beginner can easily operate a driving operation.

그러므로 자동 변속기는 운전자의 변속 레버의 선택 위치에 따라 포트 변환이 이루어져 오일 펌프로부터 유체압을 공급받고, 상기 유체압에 의해 유압 밸브의 동작 상태가 가변되어 변속기어 메카니즘의 기어단 중 어느 하나의 변속단을 선택하기 위한 유압 작동 마찰 요소의 동작 상태를 제어한다.Therefore, the automatic transmission receives a fluid pressure from the oil pump by changing the port according to the selected position of the driver's shift lever, and the operating state of the hydraulic valve is changed by the fluid pressure so that any one of the gear stages of the transmission gear mechanism is shifted. Controls the operating state of the hydraulically actuated friction element for selecting stages.

클러치나 브레이크로 이루어져 있는 마찰 요소의 선택적인 동작에 따라 유성 기어장치의 작동이 전환되어, 적절한 변속비가 행해진 후 드라이브 기어로 전달된다.The selective operation of the friction element consisting of a clutch or a brake switches the operation of the planetary gear unit, which is then transmitted to the drive gear after an appropriate transmission ratio is made.

상기 드라이브 기어로 변속된 동력이 전달되면, 변속된 동력은 상기 드라이브 기어와 치차 결합된 드리븐 기어에 의해 종감속 기어와 치차 결합된 중동 기어로 전달되어, 바퀴의 회전 동작을 제어한다.When the shifted power is transmitted to the drive gear, the shifted power is transmitted to the middle gear geared to the longitudinal reduction gear by the driven gear geared to the drive gear to control the rotational operation of the wheel.

상기와 같이 자동차의 주행 상태에 따라 목표 변속단이 결정되고, 결정된 목표 변속단으로의 제어 동작을 실행할 경우, 클러치나 브레이크 등으로 이루어져 있는 마찰 요소중에서 각 목표 변속단마다 각 해당하는 마찰 요소를 동작시킨다.As described above, the target shift stage is determined according to the driving state of the vehicle, and when the control operation to the determined target shift stage is executed, the corresponding friction element is operated for each target shift stage among friction elements consisting of a clutch or a brake. Let's do it.

상기와 같이 동작하는 자동 변속기 장착 차량이 주행 단인 D레인지에서 1속 또는 2속 주행으로 내리막길 또는 급브레이크 작동시 종래에는 엔진 브레이크의 효과가 나타나지 않아 브레이크의 작동 빈도수가 빈번하였다.When the vehicle equipped with the automatic transmission operating as described above goes downhill or sudden brake operation at the first or second speed in the range D, the engine brake effect is not conventional, and thus the frequency of operation of the brake is frequent.

그러나 상기한 종래의 기술은 차량의 저속 주행중 또는 내리막길 주행시 엔진 브레이크의 효과가 없어 운전자가 브레이크를 작동하는 회수가 빈번하여 운전의 편이성이 저하되고, 차량의 정지 거리가 길어져 급브레이크 작동시 교통사고 발생의 문제점이 있다.However, the above-mentioned conventional technology does not have an effect of the engine brake during low speed driving or downhill driving of the vehicle, so that the number of times the driver operates the brake is reduced, and the convenience of driving is reduced, and the stopping distance of the vehicle is long, resulting in a traffic accident during sudden brake operation. There is a problem of occurrence.

따라서, 상기한 종래의 문제점을 해결하고자, 스로틀 밸브의 개도량과 차속 및 가속페달의 동작상태에 따라 운전자의 감속의지를 판단함에 있어, 스로틀 밸브의 개도량이 설정 기준값보다 작은 경우, 가속 페달의 동작 상태와 차속에 의해 운전자의 감속의지를 판단하여 상기의 감속도가 제1 설정 기준값보다 크거나 제2 설정 기준값보다 작은 경우 변속단의 유로를 L레인지로 형성하기 위한 제어신호를 출력하여 차량의 엔진 브레이크를 작동시키므로 써, 차량의 저속 주행중 내리막길 또는 급브레이크 작동시 차량의 정지거리를 단축시킬 수 있는 효과를 가진 자동 변속기의 변속 제어방법을 제공하기 위한 것이다.Therefore, in order to solve the above-mentioned problems, in determining the driver's deceleration intention according to the opening amount of the throttle valve and the operation speed of the vehicle speed and the accelerator pedal, when the opening amount of the throttle valve is smaller than the set reference value, the operation of the accelerator pedal If the deceleration is greater than the first set reference value or less than the second set reference value, the control signal for forming the flow path of the shift stage to the L range is output by determining the driver's deceleration intention based on the state and the vehicle speed. By operating the brake, it is to provide a shift control method of an automatic transmission having the effect of reducing the stopping distance of the vehicle during downhill driving or sudden brake operation during low-speed driving of the vehicle.

상기한 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,

차량이 주행 단인 D레인지에서 변속단이 1속 또는 2속인 저속으로 주행하고 있는 상태에서 차량이 내리막길 또는 급브레이크를 동작할 때 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은가를 판단하는 단계와;Determines whether the opening amount of the current throttle valve is smaller than the set reference throttle valve opening amount when the vehicle is driving downhill or sudden brakes while the gear is traveling at a low speed of 1 or 2 speeds in the D range, which is the driving stage. Making a step;

상기에서 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은 경우, 차속과 가속페달 스위치의 상태에 따라 운전자의 감속도를 계산하여 산출하고, 상기에서 산출된 차량의 감속도가 제1 설정 기준값보다 큰가를 판단하는 단계와:When the opening amount of the current throttle valve is smaller than the set reference throttle valve opening amount, the deceleration of the driver is calculated and calculated according to the vehicle speed and the state of the accelerator pedal switch, and the calculated deceleration of the vehicle is set to the first setting. Determining if the reference value is greater than:

상기에서 차량의 감속도가 설정된 기준값보다 큰 경우, 변속단을 L레인지로 변환하기 위한 유로를 형성하기 위한 제어 신호를 출력하는 단계를 포함하여 이루어지는 것을 특징으로 한다.And outputting a control signal for forming a flow path for converting the shift stage to the L range when the deceleration of the vehicle is greater than the set reference value.

도1은 본 발명의 실시예에 따른 자동 변속기의 변속 제어장치 구성 블럭도이고,1 is a block diagram of a shift control apparatus of an automatic transmission according to an embodiment of the present invention;

도2는 본 발명의 실시예에 따른 자동 변속기의 변속 제어방법 동작 순서도이다.2 is a flowchart illustrating a shift control method of an automatic transmission according to an exemplary embodiment of the present invention.

상기한 목적을 구체적으로 달성하여 실현할 수 있는 본 발명의 실시예를 첨부한 도면을 참조로 상세히 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, which can be achieved and realized in detail by the above objects, will be described in detail with reference to the accompanying drawings.

첨부한 도1에 도시되어 있듯이 본 발명의 실시예에 따른 자동 변속기의 변속 제어장치 구성은,As shown in Figure 1 attached to the shift control apparatus of the automatic transmission according to an embodiment of the present invention,

차량의 주행상태에 따라 가변되어 출력되어지는 신호를 인가 받아 해당하는 신호를 출력하는 차량 주행상태 감지수단(10)과;A vehicle driving state sensing means 10 which receives a signal that is variable and output according to the driving state of the vehicle and outputs a corresponding signal;

상기 차량 주행상태 감지수단(10)에서 출력되는 신호를 인가 받아 판독하여 스로틀 밸브의 개도량이 설정 기준값보다 작은 경우, 가속 페달의 동작 상태와 차속에 의해 운전자의 감속의지를 판단하여 상기의 감속도가 제1 설정 기준값보다 크거나 제2 설정 기준값보다 작은 경우 변속단의 유로를 L레인지로 형성하기 위한 제어 신호를 출력하는 제어 수단(20)과;When the opening amount of the throttle valve is smaller than the set reference value by reading and receiving the signal output from the vehicle driving state detecting means 10, the deceleration degree is determined by determining the driver's deceleration intention based on the operation state of the accelerator pedal and the vehicle speed. Control means for outputting a control signal for forming the flow path of the shift stage in the L range when larger than the first set reference value or smaller than the second set reference value;

상기 제어 수단(20)에서 출력되어지는 제어 신호를 인가 받아 변속단을 L레인지로 가변할 수 있도록 유로를 형성하여 주는 구동수단(30)으로 이루어져 있다.It consists of a drive means 30 for receiving a control signal output from the control means 20 to form a flow path so that the shift stage can be varied in the L range.

상기에 있어서, 차량 주행상태 감지 수단(10)은,In the above, the vehicle driving state detection means 10,

가속 페달의 동작상태에 연동하여 개폐 상태가 가변되는 스로틀 밸브의 개도 정도를 감지하여 해당 신호를 출력하는 스로틀 밸브 개도 감지부(11)와;A throttle valve opening degree detection unit 11 for detecting an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal and outputting a corresponding signal;

차량의 주행속도를 감지하여 해당 신호를 출력하는 차속 감지부(12)와;A vehicle speed detector 12 which detects a driving speed of the vehicle and outputs a corresponding signal;

스로틀 밸브 개도량과 차속에 따라 변속단이 가변되면, 상기의 변속단의 가변상태를 감지하여 해당하는 신호를 출력하는 변속단 감지부(13)와;A shift stage detecting unit 13 for detecting a variable state of the shift stage and outputting a corresponding signal when the shift stage is changed according to the throttle valve opening amount and the vehicle speed;

운전자의 가, 감속의지에 따라 가속페달을 동작시킬 때마다 상기의 가속페달 온,오프 동작 상태를 해당하는 신호로 출력하는 가속페달 스위치(14)와 운전자의 의지에 따라 오버 드라이버 모드의 선택을 검출하여 해당하는 신호를 출력하는 오버 드라이버 스위치(15)로 이루어져 있다.Whenever the driver operates the accelerator pedal according to the deceleration intention of the driver, the accelerator pedal switch 14 which outputs the above state of the accelerator pedal on and off as a corresponding signal and the selection of the over driver mode according to the driver's will are detected. It consists of an over-driver switch 15 for outputting a corresponding signal.

차량이 주행 단인 D레인지에서 변속단이 1속 또는 2속인 저속으로 주행하고 있는 상태에서 차량이 내리막길 또는 급브레이크를 동작할 때 제어 수단(20)은 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은가를 판단한다(S100).The control means 20 controls the reference throttle valve in which the opening amount of the current throttle valve is set when the vehicle is driving downhill or sudden brakes while the vehicle is traveling at a low speed of 1 or 2 speeds in the D range, which is the driving stage. It is determined whether it is smaller than the opening amount (S100).

상기에서 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은 경우, 제어 수단(20)은 차속(12)과 가속페달 스위치(14)의 상태에 따라 운전자의 감속도를 계산하여 산출하고, 상기에서 산출된 차량의 감속도가 제1 설정 기준값보다 큰가를 판단한다(S110).When the opening amount of the current throttle valve is smaller than the set reference throttle valve opening amount, the control means 20 calculates and calculates the driver's deceleration according to the state of the vehicle speed 12 and the accelerator pedal switch 14, It is determined whether the deceleration of the vehicle calculated above is greater than the first set reference value (S110).

상기에서 차량의 감속도가 설정된 기준값보다 큰 경우, 제어 수단(20)은 변속단을 L레인지로 변환하기 위한 유로를 형성하기 위한 제어 신호를 구동 수단(30)에 출력한다(S120).When the deceleration of the vehicle is greater than the set reference value, the control means 20 outputs a control signal to the driving means 30 to form a flow path for converting the shift stage into the L range (S120).

하지만 상기에서 산출된 차량의 감속도가 제1 설정 기준값보다 작은 경우, 제어 수단(20)은 상기에서 산출된 차량의 감속도가 제2 설정 기준값보다 큰가를 판단한다(S111).However, when the deceleration of the vehicle calculated above is smaller than the first setting reference value, the control means 20 determines whether the deceleration of the vehicle calculated above is greater than the second setting reference value (S111).

상기에서 차량의 감속도가 제2 설정 기준값보다 큰 경우, 제어 수단(20)은 변속단을 L레인지로 변환하기 위한 유로를 형성하기 위한 제어 신호를 구동 수단(30)에 출력한다(S120).When the deceleration of the vehicle is greater than the second set reference value, the control means 20 outputs a control signal for forming a flow path for converting the shift stage to the L range to the driving means 30 (S120).

따라서 구동 수단(30)은 상기 제어 수단(20)에서 출력되는 제어 신호를 인가받아 차량이 저속 주행중 내리막길 또는 급브레이크 작동시 엔진 브레이크를 작동시킬 수 있도록 변속단을 L레인지로 변환하기 위한 유로를 형성하여 준다.Therefore, the driving means 30 receives the control signal output from the control means 20 and receives a flow path for converting the shift stage into the L range so that the engine brake can be operated when the vehicle is going downhill or at the time of sudden brake operation during low speed driving. Form it.

상기한 실시예는 가장 바람직한 실시예를 설명한 것으로써, 이에 한정되는 것은 아니며, 상기 실시예로부터 용이하게 설명할 수 있는 것도 본 발명에 포함된다.The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

이상에서와 같이 본 발명의 실시예서 스로틀 밸브의 개도량과 차속 및 가속 페달의 동작상태에 따라 운전자의 감속의지를 판단함에 있어, 스로틀 밸브의 개도량이 설정 기준값보다 작은 경우, 가속 페달의 동작 상태와 차속에 의해 운전자의 감속의지를 판단하여 상기의 감속도가 제1 설정 기준값보다 크거나 제2 설정 기준값보다 작은 경우 변속단의 유로를 L레인지로 형성하기 위한 제어신호를 출력하여 차량의 엔진 브레이크를 작동시키므로 써, 차량의 저속 주행중 내리막길 또는 급브레이크 작동시 차량의 정지거리를 단축시킬 수 효과를 가진 자동 변속기의 변속 제어방법을 제공할 수 있다.As described above, in determining the driver's deceleration intention according to the opening amount of the throttle valve and the operating speed of the vehicle speed and the accelerator pedal, when the opening amount of the throttle valve is smaller than the set reference value, When the deceleration is greater than the first set reference value or less than the second set reference value, the control signal for forming the flow path of the shift stage to the L range is output by determining the driver's deceleration determination based on the vehicle speed. By operating, it is possible to provide a shift control method of an automatic transmission having an effect of shortening the stopping distance of the vehicle during downhill driving or sudden brake operation during low speed driving of the vehicle.

Claims (2)

차량이 주행 단인 D레인지에서 변속단이 1속 또는 2속인 저속으로 주행하고 있는 상태에서 차량이 내리막길 또는 급브레이크를 동작할 때 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은가를 판단하는 단계와;Determines whether the opening amount of the current throttle valve is smaller than the set reference throttle valve opening amount when the vehicle is driving downhill or sudden brakes while the gear is traveling at a low speed of 1 or 2 speeds in the D range, which is the driving stage. Making a step; 상기에서 현재의 스로틀 밸브의 개도량이 설정된 기준 스로틀 밸브 개도량보다 작은 경우, 차속과 가속페달 스위치의 상태에 따라 운전자의 감속도를 계산하여 산출하고, 상기에서 산출된 차량의 감속도가 제1 설정 기준값보다 큰가를 판단하는 단계와;When the opening amount of the current throttle valve is smaller than the set reference throttle valve opening amount, the deceleration of the driver is calculated and calculated according to the vehicle speed and the state of the accelerator pedal switch, and the calculated deceleration of the vehicle is set to the first setting. Determining whether the reference value is larger than the reference value; 상기에서 차량의 감속도가 설정된 기준값보다 큰 경우, 변속단을 L레인지로 변환하기 위한 유로를 형성하기 위한 제어 신호를 출력하는 단계를 포함하여 이루어지는 것을 특징으로 하는 자동 변속기의 변속 제어방법.And outputting a control signal for forming a flow path for converting the shift stage to the L range when the deceleration of the vehicle is greater than a predetermined reference value. 청구항 1에 있어서, 산출된 차량의 감속도가 제1 설정 기준값보다 작은 경우, 상기에서 산출된 차량의 감속도가 제2 설정 기준값보다 큰가를 판단하는 단계와;The method of claim 1, further comprising: determining whether the calculated deceleration of the vehicle is greater than the second preset reference value when the calculated deceleration of the vehicle is less than the first preset reference value; 상기에서 차량의 감속도가 제2 설정 기준값보다 큰 경우, 변속단을 L레인지로 변환하기 위한 유로를 형성하기 위한 제어 신호를 출력하는 것을 포함하여 이루어진 자동 변속기의 변속 제어방법.And outputting a control signal for forming a flow path for converting the shift stage to the L range when the deceleration of the vehicle is greater than the second set reference value.
KR1019960063624A 1996-12-10 1996-12-10 Shift control method of automatic transmission KR100401600B1 (en)

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