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KR100308985B1 - Power On / Off Judgment Method of Automatic Transmission - Google Patents

Power On / Off Judgment Method of Automatic Transmission Download PDF

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Publication number
KR100308985B1
KR100308985B1 KR1019970080039A KR19970080039A KR100308985B1 KR 100308985 B1 KR100308985 B1 KR 100308985B1 KR 1019970080039 A KR1019970080039 A KR 1019970080039A KR 19970080039 A KR19970080039 A KR 19970080039A KR 100308985 B1 KR100308985 B1 KR 100308985B1
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South Korea
Prior art keywords
power
reference value
equal
automatic transmission
engine speed
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KR1019970080039A
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Korean (ko)
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KR19990059825A (en
Inventor
유평환
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이계안
현대자동차주식회사
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Priority to KR1019970080039A priority Critical patent/KR100308985B1/en
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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
    • 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
    • F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
    • 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
    • F16H2061/0075—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 a particular control method
    • F16H2061/0096—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 a particular control method using a parameter map

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

Abstract

본 발명에 의한 자동변속기의 파워 온/오프 판정방법은, 차량이 주행을 시작하면 운전자의 가속페달 조작상태와 자동 변속기의 동작상태에 따라 검출되는 유온등에 따라 댐퍼 클러치의 작동상태를 판단하는 단계와; 상기 단계에서 댐퍼 클러치가 동작하는 상태에서 터빈 회전수에서 엔진 회전수를 감산 연산한 값이 소정의 설정된 기준값보다 크거나 같은지 여부와, 스로틀 밸브 변화량이 소정의 설정된 기준값보다 크거나 같은지 여부를 판단하는 단계와; 상기 단계에서 터빈 회전수에서 엔진 회전수를 감산 연산한 값이 설정 기준값보다 크거나 같으며 스로틀 밸브 변화량이 설정된 기준값보다 작은 경우에는 파워 오프로 판정하는 단계와; 터빈 회전수에서 엔진 회전수를 감산 연산한 값이 소정의 설정 기준값보다 크거나 같으며 스로틀 밸브 변화량이 소정의 설정된 기준값보다 크거나 같은 경우에는 파워 온으로 판정하는 단계로 이루어져 있어, 운전자의 미소한 가속페달 조작 상황에도 그에 알맞은 변속 제어 로직을 사용할 수 있어 비정상적인 변속쇼크를 개선할 수 있고, 엔진 회전수(Ne)의 편차에 따른 파워 온/오프 판정선의 오차를 없앨 수 있어 변속제어의 신뢰성을 향상시킬 수 있는 효과가 있다.The power on / off determination method of the automatic transmission according to the present invention includes determining the operating state of the damper clutch according to the oil temperature detected according to the driver's accelerator pedal operation state and the automatic transmission operation state when the vehicle starts to travel. ; In this step, it is determined whether the value obtained by subtracting the engine speed from the turbine speed in the state where the damper clutch is operating is greater than or equal to a predetermined set reference value, and whether the throttle valve change amount is greater than or equal to the predetermined set reference value. Steps; Determining power-off if the value obtained by subtracting the engine speed from the turbine speed is greater than or equal to the set reference value and the throttle valve variation is less than the set reference value; When the value of the engine speed subtracted from the turbine speed is greater than or equal to the predetermined reference value and the throttle valve change amount is greater than or equal to the predetermined reference value, the operation is determined to be powered on. The shift control logic suitable for the accelerator pedal operation situation can be used to improve abnormal shift shocks, and the error of the power on / off determination line due to the deviation of the engine speed Ne can be eliminated to improve the reliability of the shift control. It can be effected.

Description

자동 변속기의 파워 온/오프 판정방법How to determine the power on / off of automatic transmission

본 발명은 자동 변속기에 관한 것으로써, 더욱 상세하게는 주행중 미소한 가속페달의 조작에 따라 파워 온/오프의 오판을 방지하기 위한 자동 변속기의 파워 온/오프 판정방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission, and more particularly, to a power on / off determination method of an automatic transmission for preventing an error of power on / off due to the operation of a minute accelerator pedal while driving.

일반적으로 자동 변속기에서 파워 온/오프 판정은 도3에 도시되어 있듯이, 엔진 회전수(Ne)와 스로틀 개도(Th)의 변화에 따라 변속 제어장치(이하 TCU라 칭함)내의 맵과 비교하여 파워 온/오프 상태를 판정한다.Generally, the power on / off determination in the automatic transmission is powered on in comparison with the map in the shift control device (hereinafter referred to as TCU) according to the change of the engine speed Ne and the throttle opening degree Th as shown in FIG. Determine the on / off state.

따라서 차량 주행상태에 따라 파워 온/오프를 판정함에 있어서, 종래에는 가속페달의 조작상태에 따라 차량의 가속상태의 제어로직과 감속상태의 제어 로직을 각각 서로 다르게 제어하고 있다.Accordingly, in determining power on / off according to the vehicle driving state, the control logic of the acceleration state of the vehicle and the control logic of the deceleration state are controlled differently according to the operation state of the accelerator pedal.

그러나 상기한 종래의 기술에서 운전자의 미소한 가속페달 조작에 따른 파워 온/오프 판정이 엔진 회전수 편차에 의해 도3에 도시되어 있는 파워 온/오프 판정선 부근에서 이루어짐에 따라 잦은 파워 온/오프 판정에 따른 오판에 의한 제어 로직이 자주 변경되어 지저분한 변속쇼크가 발생하는 문제점이 있다.However, in the above conventional technology, the power on / off determination according to the driver's minute accelerator pedal operation is made near the power on / off determination line shown in FIG. There is a problem in that a dirty shift shock occurs due to frequent change of the control logic due to a misjudgment.

따라서 본 발명의 목적은 상기한 문제점을 해결하기 위해 안출된 것으로서, 차량 주행상태에 따른 운전자의 미소한 가속페달 조작에 따른 파워 온/오프 판정은 댐퍼 클러치의 작동상태와 엔진 회전수(Ne) 및 터빈 회전수(Nt)의 관계에 따라 파워 온/오프를 판정하기 위한 자동 변속기의 파워 온/오프 판정방법을 제공하기 위한 것이다.Accordingly, an object of the present invention is to solve the above problems, the power on / off determination according to the driver's micro accelerator pedal operation according to the driving state of the vehicle is the operating state of the damper clutch and the engine speed Ne and It is an object of the present invention to provide a power on / off determination method of an automatic transmission for determining power on / off in accordance with the relationship between the turbine speed Nt.

도1은 본 발명의 실시예에 따른 자동 변속기의 파워 온/오프 판정장치 구성 블럭도이고,1 is a block diagram of a power on / off determination device of the automatic transmission according to an embodiment of the present invention,

도2는 본 발명의 실시예에 따른 자동 변속기의 파워 온/오프 판정방법 동작 순서도이고,2 is a flowchart illustrating a method for determining a power on / off of an automatic transmission according to an exemplary embodiment of the present invention.

도3은 본 발명의 실시예에 따른 자동 변속기의 파워 온/오프 판정 그래프이다.3 is a power on / off determination graph of the automatic transmission according to an embodiment of the present invention.

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

차량이 주행을 시작하면 운전자의 가속페달 조작상태와 자동 변속기의 동작상태에 따라 검출되는 유온 등에 따라 댐퍼 클러치의 작동상태를 판단하는 단계와;Determining an operation state of the damper clutch according to an oil temperature detected according to an accelerator pedal operation state of the driver and an operation state of the automatic transmission when the vehicle starts driving;

상기 단계에서 댐퍼 클러치가 동작하는 상태에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 소정의 설정된 기준값보다 크거나 같은지 여부와, 스로틀 밸브 변화량(△Th)이 소정의 설정된 기준값보다 크거나 같은지 여부를 판단하는 단계와;Whether the value obtained by subtracting the engine speed Ne from the turbine speed Nt while the damper clutch is operating in the step is greater than or equal to the predetermined reference value, and the throttle valve change amount ΔTh is predetermined Determining whether it is greater than or equal to a set reference value;

상기 단계에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 설정 기준값보다 크거나 같으며, 스로틀 밸브 변화량(△Th)이 설정된 기준값보다 작은 경우에는 파워 오프(Power Off)로 판정하는 단계와;If the value obtained by subtracting the engine speed Ne from the turbine speed Nt in the above step is greater than or equal to the set reference value, and the throttle valve change amount ΔTh is smaller than the set reference value, the power is turned off. Determining that;

터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 소정의 설정 기준값보다 크거나 같으며 스로틀 밸브 변화량(△Th)이 소정의 설정된 기준값보다 크거나 같은 경우에는 파워 온(Power On)으로 판정하는 단계를 포함하여 이루어지는 것을 특징으로 한다.When the value obtained by subtracting the engine speed Ne from the turbine speed Nt is greater than or equal to the predetermined reference value and the throttle valve change amount ΔTh is greater than or equal to the predetermined reference value, power-on On), characterized in that it comprises a step.

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.

도1에 도시되어 있듯이, 본 발명의 실시예에 따른 자동 변속기의 파워 온/오프 판정장치의 구성은,As shown in Figure 1, the configuration of the power on / off determination device of the automatic transmission according to an embodiment of the present invention,

차량의 주행상태에 따라 가변되어 출력되는 신호를 감지하여 소정의 전기신호를 출력하는 차량 주행상태 감지수단(10)과;A vehicle driving state detecting means 10 for detecting a signal that is variable and output according to a driving state of the vehicle and outputting a predetermined electric signal;

상기 주행상태 감지수단에서 출력되는 소정의 전기신호를 인가 받아 댐퍼 클러치의 동작상태를 판단하고, 엔진 회전수(Ne)와 터빈 회전수(Nt)의 관계를 판단하여 파워 온/오프를 판정하는 TCU(20)를 포함하여 이루어져 있다.TCU for determining the operation state of the damper clutch by receiving a predetermined electric signal output from the driving state detecting means, and determining the power on / off by determining the relationship between the engine speed Ne and the turbine speed Nt. It consists of 20.

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

가속 페달의 동작상태에 연동하여 개폐 상태가 가변되는 스로틀 밸브의 개도 정도를 감지하여 소정의 신호를 출력하는 스로틀 밸브 개도 감지부(11)와;A throttle valve opening degree detector 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 predetermined signal;

차량의 출력축 회전수를 감지하여 차량의 주행속도에 상응하는 소정의 신호를 출력하는 차속 감지부(12)와;A vehicle speed detector 12 that detects an output shaft rotational speed of the vehicle and outputs a predetermined signal corresponding to the traveling speed of the vehicle;

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;

변속기의 입력축과 연결되어 있는 토오크 컨버터의 터빈축의 회전 속도를 감지하여 소정의 신호를 출력하는 터빈축 회전수 감지부(14)와;A turbine shaft rotational speed sensing unit 14 for sensing a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and outputting a predetermined signal;

엔진의 동작 상태에 따라 가변되는 크랭크축의 회전 속도를 검출하여 소정의 신호를 출력하는 엔진 회전수 감지부(15)와;An engine rotation speed detection unit (15) for detecting a rotation speed of the crankshaft variable according to an operating state of the engine and outputting a predetermined signal;

차량 주행상태에 따라 가변되어 출력되는 자동 변속기 오일의 온도를 검출하여 소정의 전기신호를 출력하는 유온 감지부(16)와;An oil temperature detection unit 16 which detects a temperature of an automatic transmission oil that is variable and output according to a vehicle driving state and outputs a predetermined electric signal;

운전자의 가속페달 조작상태에 따라 가변되어 출력되는 온/오프신호를 검출하여 소정의 전기신호를 출력하는 가속페달 스위치(17)를 포함하여 이루어져 있다.And an accelerator pedal switch 17 which detects an on / off signal that is variable and output according to the driver's accelerator pedal operation state and outputs a predetermined electric signal.

상기한 구성에 의해 이루어져 있는 자동 변속기의 파워 온/오프 판정방법을 도2를 참조하여 설명한다.The power on / off determination method of the automatic transmission made up of the above-described configuration will be described with reference to FIG.

차량이 주행을 시작하면 TCU(20)는 운전자의 가속페달 조작상태와 자동 변속기의 동작상태에 따라 검출되는 유온 등에 따라 댐퍼 클러치의 작동상태를 판단한다(S100,S110).When the vehicle starts to travel, the TCU 20 determines the operation state of the damper clutch according to the oil temperature detected according to the driver's accelerator pedal operation state and the automatic transmission operation state (S100 and S110).

상기에서 차량 주행중 댐퍼 클러치가 동작한 경우, TCU(20)는 차량의 엔진 회전수(Ne)와 터빈 회전수(Nt)의 관계를 판단한다(S120).When the damper clutch is operated while driving the vehicle, the TCU 20 determines the relationship between the engine speed Ne and the turbine speed Nt of the vehicle (S120).

즉, 파워의 흐름이 엔진에서 출력된 동력이 자동 변속기에 전달되어 차체를 구동시키는 경우를 파워 온(Power On)이라 하고, 그와 반대로 차체의 구동력이 자동 변속기에 전달되어 엔진으로 전달되는 것을 파워 오프(Power Off)라 한다.That is, a case where the power flow is transmitted from the engine to the automatic transmission to drive the vehicle body is called Power On. On the contrary, the driving force of the vehicle body is transmitted to the automatic transmission to the engine. Called off (Power Off).

따라서 TCU(20)는 엔진 회전수(Ne)가 터빈 회전수(Nt)보다 크거나 같으면 파워 온이라 판정하고, 엔진 회전수(Ne)가 터빈 회전수(Nt)보다 작으면 파워 오프라 판정한다.Therefore, the TCU 20 determines that the engine speed Ne is greater than or equal to the turbine speed Nt, and the power is on. If the engine speed Ne is less than the turbine speed Nt, the TCU 20 determines that the power is off.

그러므로 상기 판단 단계에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)을 감산 연산한 값이 -50rpm보다 크거나 같으면 파워 오프로 판정한 후, 스로틀 밸브 변화량(△Th)이 설정된 기준값인 3.3%/sec보다 크거나 같은가를 판단한다(S130).Therefore, if the value obtained by subtracting the engine speed Ne from the turbine speed Nt in the determination step is greater than or equal to -50 rpm, the power is determined to be off, and then the throttle valve change amount ΔTh is 3.3% which is the set reference value. It is determined whether greater than or equal to / sec (S130).

상기에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)을 감산 연산한 값이 -50rpm보다 크거나 같고, 스로틀 밸브 변화량(△Th)이 설정된 기준값인 3.3%/sec보다 작은 경우 TCU(20)는 파워 오프(Power Off)라 판정한다(S140).The TCU 20 when the value obtained by subtracting the engine speed Ne from the turbine speed Nt is greater than or equal to -50 rpm and the throttle valve change amount ΔTh is less than the set reference value of 3.3% / sec. It is determined that the power off (Power Off) (S140).

하지만 상기에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)을 감산 연산한 값이 -50rpm보다 크거나 같고, 스로틀 밸브 변화량(△Th)이 설정된 기준값인 3.3%/sec보다 크거나 같은 경우, TCU(20)는 파워 온(Power On)이라 판정한다(S141).However, if the value obtained by subtracting the engine speed Ne from the turbine speed Nt is greater than or equal to -50 rpm, and the throttle valve change amount ΔTh is greater than or equal to the set reference value of 3.3% / sec, The TCU 20 determines that the power is on (S141).

또한 상기에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)을 감산 연산한 값이 -50rpm보다 작으면 TCU(20)는 파워 온(Power On)이라 판정한다.Further, when the value obtained by subtracting the engine speed Ne from the turbine speed Nt is less than -50 rpm, the TCU 20 determines that the power is on.

그러나 상기(S110)에서 댐퍼 클러치가 작동되지 않는 경우, TCU(20)는 도3에 도시되어 있듯이 맵에 설정되어 있는 파워 온/오프 판정선에 따라 파워 온/오프를 판정한다(S111).However, when the damper clutch is not operated in S110, the TCU 20 determines power on / off in accordance with the power on / off determination line set in the map as shown in FIG. 3 (S111).

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 파워 온/오프 판정을 확실히 함으로서, 운전자의 미소한 가속페달 조작 상황에도 그에 알맞은 변속 제어 로직을 사용할 수 있어 비정상적인 변속쇼크를 개선할 수 있고, 엔진 회전수(Ne)의 편차에 따른 파워 온/오프 판정선의 오차를 없앨 수 있어 변속제어의 신뢰성을 향상시킬 수 있는 효과가 있다.As described above, by assuring power on / off determination in the embodiment of the present invention, the shift control logic suitable for the driver's minute accelerator pedal operation situation can be used to improve abnormal shift shock, and the engine speed (Ne Since the error of the power on / off determination line due to the deviation of) can be eliminated, the reliability of shift control can be improved.

Claims (3)

차량이 주행을 시작하면 운전자의 가속페달 조작상태와 자동 변속기의 동작상태에 따라 검출되는 유온 등에 따라 댐퍼 클러치의 작동상태를 판단하는 단계와;Determining an operation state of the damper clutch according to an oil temperature detected according to an accelerator pedal operation state of the driver and an operation state of the automatic transmission when the vehicle starts driving; 상기 단계에서 댐퍼 클러치가 동작하는 상태에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 소정의 설정된 기준값보다 크거나 같은지 여부와, 스로틀 밸브 변화량(△Th)이 소정의 설정된 기준값보다 크거나 같은지 여부를 판단하는 단계와;Whether the value obtained by subtracting the engine speed Ne from the turbine speed Nt while the damper clutch is operating in the step is greater than or equal to the predetermined reference value, and the throttle valve change amount ΔTh is predetermined Determining whether it is greater than or equal to a set reference value; 상기 단계에서 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 설정 기준값보다 크거나 같으며 스로틀 밸브 변화량(△Th)이 설정된 기준값보다 작은 경우에는 파워 오프(Power Off)로 판정하는 단계와;When the value obtained by subtracting the engine speed Ne from the turbine speed Nt in this step is greater than or equal to the set reference value and the throttle valve change amount ΔTh is smaller than the set reference value, the power is turned off. Determining; 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 소정의 설정 기준값보다 크거나 같으며 스로틀 밸브 변화량(△Th)이 소정의 설정된 기준값보다 크거나 같은 경우에는 파워 온(Power On)으로 판정하는 단계를 포함하여 이루어지는 것을 특징으로 하는 자동 변속기의 파워 온/오프 판정방법.When the value obtained by subtracting the engine speed Ne from the turbine speed Nt is greater than or equal to the predetermined reference value and the throttle valve change amount ΔTh is greater than or equal to the predetermined reference value, power-on On), the power on / off determination method of the automatic transmission comprising a step of determining. 청구항 1에 있어서, 터빈 회전수(Nt)에서 엔진 회전수(Ne)를 감산 연산한 값이 소정의 설정 기준값보다 작은 경우에는 파워 온(Power On)으로 판정하는 것을 포함하여 이루어진 자동 변속기의 파워 온/오프 판정방법.The power-on of the automatic transmission according to claim 1, comprising determining power on when the value obtained by subtracting the engine speed Ne from the turbine speed Nt is smaller than a predetermined set reference value. On / off judgment method. 청구항 1에 있어서, 댐퍼 클러치가 작동되지 않는 경우, 메모리 맵에 설정되어 있는 파워 온/오프 판정선에 따라 파워 온/오프를 판정하는 것을 포함하여 이루어진 자동 변속기의 파워 온/오프 판정방법.The power on / off determination method of an automatic transmission according to claim 1, comprising determining power on / off in accordance with a power on / off determination line set in a memory map when the damper clutch is not operated.
KR1019970080039A 1997-12-31 1997-12-31 Power On / Off Judgment Method of Automatic Transmission KR100308985B1 (en)

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