KR100412708B1 - Shift control method of continuous variable transmission vehicles - Google Patents

Shift control method of continuous variable transmission vehicles Download PDF

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Publication number
KR100412708B1
KR100412708B1 KR10-2001-0080545A KR20010080545A KR100412708B1 KR 100412708 B1 KR100412708 B1 KR 100412708B1 KR 20010080545 A KR20010080545 A KR 20010080545A KR 100412708 B1 KR100412708 B1 KR 100412708B1
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South Korea
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speed
variable transmission
shift control
fuel
control method
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KR10-2001-0080545A
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Korean (ko)
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KR20030050149A (en
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이성호
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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
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
    • 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
    • F16H59/36—Inputs being a function of speed
    • F16H2059/366—Engine or motor speed
    • 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
    • F16H2061/0015—Transmission control for optimising fuel consumptions

Abstract

목적 : 본 발명은 연료차단 가능 상태 및 댐퍼 클러치의 작동 여부에 따라 엔진의 회전수를 높이거나 낮추어 제어함으로서 감속 시, 연비 및 NVH를 향상시키는 무단변속기 장착 차량의 변속 제어방법을 제공하는 데 그 목적이 있다.OBJECT: The present invention provides a method of controlling a continuously variable transmission vehicle that improves fuel efficiency and NVH by decelerating the engine by increasing or decreasing the engine speed according to a fuel cutoff state and whether the damper clutch is operated. There is this.

구성 : 이 무단변속기 장착 차량의 변속 제어방법은 무단변속기 차량의 주행 속도가 감속 상태인가를 판단하고, 이 판단이 감속인 경우 연료차단 가능 상태 및 댐퍼 클러치 작동 가능 여부를 판단하며, 이 판단에서 연료차단 가능 상태 및 댐퍼 클러치 작동인 경우에는 엔진의 회전수를 높게 제어하고, 연료차단 불가능 상태 또는 댐퍼 클러치 비작동인 경우에는 엔진 회전수를 낮게 제어한다.Configuration: The shift control method of the continuously variable transmission vehicle determines whether the traveling speed of the continuously variable transmission vehicle is in a decelerated state, and when the determination is decelerated, it is possible to determine the fuel cutoff state and the damper clutch operation, and in this determination, The engine speed is controlled to be high in the case of the shutoff state and the damper clutch operation, and the engine speed is controlled to be low in the non-fuel shutoff state or the damper clutch operation.

Description

무단변속기 장착 차량의 변속 제어방법 {SHIFT CONTROL METHOD OF CONTINUOUS VARIABLE TRANSMISSION VEHICLES}Shift control method for vehicles with continuously variable transmissions {SHIFT CONTROL METHOD OF CONTINUOUS VARIABLE TRANSMISSION VEHICLES}

본 발명은 무단변속기 장착 차량의 변속 제어방법에 관한 것으로서, 보다 상세하게는 감속 시 댐퍼 클러치 작동 여부 및 연료차단 가능 및 불가능 상태에 따라 변속제어를 별도로 하는 무단변속기 장착 차량의 변속 제어방법에 관한 것이다.The present invention relates to a shift control method for a vehicle with a continuously variable transmission, and more particularly, to a shift control method for a continuously variable transmission vehicle according to whether a damper clutch is operated at a deceleration and fuel control is enabled or disabled. .

일반적으로 연료차단(fuel cut)은 스로틀 밸브가 닫힘과 동시에 메인 라인의 가솔린 공급을 멈추게 하여 연료가 불필요하게 소비되는 것을 방지시킨다.In general, a fuel cut stops the supply of gasoline to the main line at the same time as the throttle valve closes to prevent unnecessary fuel consumption.

이 연료차단 제어방법은 무단변속기 차량에 적용되어, 도 4에 도시된 바와 같은 변속비 제어 맵으로 제어되고 있다. 즉, 이 변속비 제어 맵은 감속으로 스로틀 개도가 0%인 목표 터빈 회전수를 연료차단 해제 회전수보다 높게 설정하고 있다.This fuel cutoff control method is applied to a continuously variable transmission vehicle, and is controlled by a speed ratio control map as shown in FIG. In other words, the speed ratio control map sets the target turbine rotational speed at which the throttle opening degree is 0% higher than the fuel cut release rotational speed by deceleration.

따라서, 이러한 제어방법은 댐퍼 클러치가 작동하지 않거나 연료차단 불가능 상태에서 스로틀 개도 0%인 목표 터빈 회전수와 연료차단 해제 회전수의 차이만큼 불필요한 회전수로 엔진을 구동시키면서 차량을 감속시키게 되므로 엔진의 연비 및 NVH(noise vibration harshness)를 불리하게 한다.Therefore, this control method decelerates the vehicle while driving the engine at an unnecessary speed by the difference between the target turbine speed and the fuel cut-off speed, where the damper clutch is not operated or the fuel cutoff is impossible. Disadvantages fuel economy and noise vibration harshness (NVH).

본 발명은 상기와 같은 점을 감안한 것으로서, 댐퍼 클러치의 작동 및 연료차단 가능 여부에 따라 엔진의 회전수를 높이거나 낮추어 제어하므로 감속 시, 연비 및 NVH를 향상시키는 무단변속기 장착 차량의 변속 제어방법을 제공하는 데 그 목적이 있다.In view of the above, the present invention provides a shift control method for a continuously variable transmission vehicle that improves fuel efficiency and NVH during deceleration because the engine speed is controlled by increasing or decreasing the engine speed according to the operation of the damper clutch and whether the fuel is cut off. The purpose is to provide.

이 무단변속기 장착 차량의 변속 제어방법은 무단변속기 차량의 주행 속도가 감속 상태인가를 판단하는 단계,The shift control method of the CVT-mounted vehicle may include determining whether the traveling speed of the CVT is in a decelerated state,

이 단계의 판단이 감속인 경우, 연료 차단 가능 여부와 댐퍼 클러치의 작동 가능 여부를 판단하는 단계,If the determination of this step is a deceleration, determining whether the fuel can be cut off and whether the damper clutch can be operated;

이 단계의 판단에 따라 엔진 회전수를 가변 제어하는 단계로 구성된다.According to the judgment of this step, it is comprised of the variable control of engine speed.

상기 엔진 회전수를 가변 제어하는 단계는 상기 단계에서 댐퍼 클러치 작동 및 연료차단 가능 상태로 판단된 경우, 엔진 회전수를 높게 제어하는 단계를 포함한다. 이 엔진 회전수를 높게 제어하는 단계는 목표 터빈 회전수에 α만큼 더한 회전수로 터빈을 제어한다.The step of variably controlling the engine speed includes controlling the engine speed to a high level when it is determined that the damper clutch operation and fuel cutoff are possible in the step. In the step of controlling the engine speed high, the turbine is controlled at a speed added by α to the target turbine speed.

상기 엔진 회전수를 가변 제어하는 단계는 댐퍼 클러치 비작동 및 연료차단 불가능 상태로 판단된 경우, 엔진 회전수를 낮게 제어하는 단계를 포함한다. 이 엔진 회전수를 낮게 제어하는 단계는 스로틀 개도 0%인 목표 터빈 회전수가 연료차단 해제 회전수보다 낮게 설정되어 있는 목표 변속비 맵의 회전수로 터빈을 제어한다.The variable control of the engine speed may include controlling the engine speed low when it is determined that the damper clutch is not operated and the fuel cutoff is impossible. In the step of controlling the engine speed low, the turbine is controlled by the speed of the target speed ratio map in which the target turbine speed with the throttle opening degree of 0% is set lower than the fuel cut release speed.

도 1은 본 발명에 따른 무단변속기 장착 차량의 변속 제어장치의 구성도.1 is a block diagram of a shift control apparatus of a continuously variable transmission vehicle according to the present invention.

도 2는 본 발명의 목표 터빈 회전수와 차속 및 스로틀 개도의 관계를 도시한 변속비 제어 맵.2 is a speed ratio control map showing a relationship between a target turbine rotation speed, a vehicle speed, and a throttle opening degree of the present invention;

도 3은 본 발명에 따른 무단변속기 장착 차량의 변속 제어방법의 순서도.3 is a flow chart of a shift control method of a continuously variable transmission vehicle according to the present invention.

도 4는 종래기술의 목표 터빈 회전수와 차속 및 스로틀 개도의 관계를 도시한 변속비 제어 맵.4 is a speed ratio control map showing a relationship between a target turbine speed and a vehicle speed and a throttle opening degree of the related art.

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

1 : 엔진 회전수 감지센서 5 : 차속 센서1: engine speed sensor 5: vehicle speed sensor

7 : 스로틀 포지션 센서 9 : 목표 터빈 회전수 제어 시스템7: Throttle Position Sensor 9: Target Turbine Rotation Speed Control System

본 발명의 이점과 장점은 이하의 바람직한 실시 예를 첨부한 도면에 의거하여 상세히 설명함으로서 보다 명확하게 될 것이다.Advantages and advantages of the present invention will be more apparent from the following detailed description based on the accompanying drawings.

도 1은 본 발명에 따른 무단변속기 장착 차량의 변속 제어장치의 구성도로서, 엔진제어유닛(ECU)의 입력단에는 엔진 회전수 감지센서(1), 차속 센서(5), 그리고 스로틀 포지션 센서(7)가 연결되어 있고, 이 엔진제어유닛(ECU)이 연료 차단 상태 신호를 트랜스밋션 제어유닛(TCU)에 입력하도록 트랜스밋션 제어유닛(TCU)의 입력단에 연결되어 있으며, 이 트랜스밋션 제어유닛(TCU)의 출력단에는 목표 터빈 회전수를 제어하는 목표 터빈 회전수 제어 시스템(9)이 연결되어 있으며, 이들 구성 요소들은 기존의 무단변속기 차량에 구비되어 있는 것을 그대로 적용할 수 있으므로 이에 대한 구체적인 설명은 생략한다.1 is a configuration diagram of a shift control apparatus for a CVT-mounted vehicle according to the present invention, wherein an engine speed sensor 1, a vehicle speed sensor 5, and a throttle position sensor 7 are provided at an input of an engine control unit ECU. ) Is connected, and this engine control unit (ECU) is connected to an input terminal of the transmission control unit (TCU) to input a fuel cutoff state signal to the transmission control unit (TCU), and the transmission control unit (TCU) Is connected to the target turbine speed control system 9 for controlling the target turbine speed, and these components can be applied to those provided in the continuously variable transmission vehicle, so a detailed description thereof is omitted. do.

먼저, 엔진제어유닛(ECU)은 그 입력단에 연결된 각 센서들의 감지신호에 의하여 연료 차단 신호를 트랜스밋션 제어유닛(TCU)에 입력하면, 트랜스밋션 제어유닛(TCU)은 목표 터빈 회전 제어 시스템(9)을 제어하는 데, 댐퍼 클러치의 작동 및 비작동과 연료차단 가능 상태인지 연료차단 불가능 상태인지에 따라서 적절하게 제어한다.First, when the engine control unit ECU inputs a fuel cutoff signal to the transmission control unit TCU according to the detection signals of the sensors connected to the input terminal, the transmission control unit TCU receives the target turbine rotation control system 9. The damper clutch is appropriately controlled depending on whether the damper clutch is activated or deactivated and whether the fuel can be blocked or not.

이 때 트랜스밋션 제어유닛(TCU)은 도 2에 도시된 변속비 제어 맵에 근거하여, 도 3의 순서도에 개시된 순서대로 제어를 실현하게 된다.At this time, the transmission control unit TCU realizes the control in the order described in the flowchart of FIG. 3 based on the speed ratio control map shown in FIG.

따라서, 트랜스밋션 제어유닛(TCU)은 엔진제어유닛(ECU)을 통하여 차량 주행 시 차속 센서(5)의 감지신호를 받아 차량의 현재 주행 상태가 감속인지 그렇지 않은지를 판단한다(ST10). 이 판단에서 감속이 아닌 경우에는 리턴하고, 감속인 경우 다음 단계로 이어진다.Accordingly, the transmission control unit TCU receives the detection signal of the vehicle speed sensor 5 when the vehicle travels through the engine control unit ECU to determine whether the current driving state of the vehicle is decelerated or not (ST10). In this judgment, if it is not deceleration, the process returns.

상기에서 감속으로 판단된 경우, 트랜스밋션 제어유닛(TCU)은 댐퍼 클러치의 작동 및 비작동 그리고 연료차단 가능 상태인지 불가능 상태를 판단하게 된다 (ST20).If it is determined as the deceleration in the above, the transmission control unit (TCU) is to determine whether the damper clutch operation and non-operation and the fuel cut-off state or not (ST20).

또한, 댐퍼 클러치의 작동 여부는 트랜스밋션제어유닛(TCU)에 의하여 판단하고, 연료차단 가능 상태는 트랜스밋션 제어유닛(TCU)이 변속비 제어 맵의 연료차단 해제 회전수이상으로 터빈이 구동되고 있는지 여부로도 판단한다. 터빈의 구동은 엔진 회전수 감지센서(1)의 감지 신호로부터 산출할 수도 있고, 별도의 터빈 회전수 센서(미도시)를 구비하여 감지할 수도 있다.In addition, the operation of the damper clutch is determined by the transmission control unit (TCU), and the fuel cutoff state is whether the turbine is driven by the transmission control unit (TCU) more than the fuel cut release speed of the speed ratio control map. Also judge. The drive of the turbine may be calculated from the detection signal of the engine speed sensor 1, or may be provided with a separate turbine speed sensor (not shown).

상기에서 댐퍼 클러치가 작동 및 연료차단 가능 상태로 판단된 경우, 트랜스밋션 제어유닛(TCU)은 목표 터빈 회전수에 α회전수를 더한 회전수(a)로 터빈을 제어한다(ST31). 즉 엔진의 회전수를 높게 제어한다.When it is determined that the damper clutch is operable and fuel cut off, the transmission control unit TCU controls the turbine at the rotation speed a after adding the α rotation speed to the target turbine rotation speed (ST31). That is, the engine speed is controlled to be high.

또한, 제20단계(ST20)에서 댐퍼 클러치가 비작동하거나 연료차단 불가능 상태로 판단된 경우, 트랜스밋션 제어유닛(TCU)은 도 2에 도시된 바와 같은 목표 변속비 맵으로 터빈 회전수를 제어한다(ST32). 즉 엔진의 회전수를 낮게 제어한다.In addition, when it is determined in the twentieth step ST20 that the damper clutch is deactivated or not capable of shutting off the fuel, the transmission control unit TCU controls the turbine speed with the target speed ratio map as shown in FIG. 2 ( ST32). That is, the engine speed is controlled low.

이 목표 변속비 맵에서는 스로틀 개도 0%인 목표 회전수가 연료차단 해제 회전수보다 낮게 설정되어 있다. 이와 같이 스로틀 개도 0%인 목표 회전수가 연료차단 해제 회전수보다 낮게 설정되어 있으므로 목표 변속비 맵의 낮은 회전수로 터빈을 제어하므로 연비 및 NVH가 향상된다.In this target speed ratio map, the target rotational speed at which the throttle opening degree is 0% is set lower than that of the fuel cut release rotational speed. Thus, since the target rotational speed which the throttle opening degree is 0% is set lower than the fuel cut-off release rotation speed, since a turbine is controlled by the low rotation speed of a target transmission ratio map, fuel economy and NVH are improved.

물론, 스로틀 개도는 스로틀 포지션 센서(7)의 감지신호로 트랜스밋션 제어유닛(TCU)이 판단한다.Of course, the throttle opening degree is determined by the transmission control unit TCU by the detection signal of the throttle position sensor 7.

본 발명의 무단변속기 장착 차량의 변속 제어방법은 댐퍼 클러치의 작동 여부 및 연료차단 가능 상태 여부를 판단하고, 이 판단에 따라 엔진의 회전수를 높이거나 낮게 제어하므로 감속 시, 연비 및 NVH를 더욱 향상시킬 수 있다.The shift control method of the CVT-equipped vehicle according to the present invention determines whether the damper clutch is operated and whether the fuel can be cut off, and increases or decreases the engine speed according to the determination, thereby further improving fuel economy and NVH. You can.

즉, 연료차단 가능 상태 및 댐퍼 클러치가 작동하는 상태인 경우에는 목표 회전수에 α회전수를 더한 회전수로 종래기술에서와 같이 터빈을 제어하고, 연료차단 불가능 상태이거나 댐퍼 클러치 비작동 상태인 경우에는 스로틀 개도 0%인 목표 회전수가 연료차단 해제 회전수보다 낮게 설정되어 있는 목표 변속비 맵으로 터빈 회전수를 제어하여 연비 및 NVH를 향상시킬 수 있다.That is, in the case of the fuel cutoff state and the damper clutch operating state, the turbine is controlled as in the conventional art at the rotational speed of the target rotational speed plus the α rotational speed, and the fuel blocking is impossible or the damper clutch non-operational state. The fuel consumption and NVH can be improved by controlling the turbine speed with the target speed ratio map in which the target rotational speed at which the throttle opening degree is 0% is set lower than the fuel cut release rotational speed.

Claims (5)

무단변속기 장착 차량의 변속 제어방법에 있어서,In the shift control method of a vehicle with a continuously variable transmission, 무단변속기 차량의 주행 속도가 감속 상태인가를 판단하는 제10단계(ST10);A tenth step ST10 of determining whether the traveling speed of the continuously variable transmission vehicle is in a decelerated state; 제10단계(ST10)의 판단이 감속인 경우, 연료 차단 가능 여부를 판단하고 댐퍼 클러치 작동 가능 여부를 판단하는 제20단계(ST20);In a case where the determination of the tenth step ST10 is deceleration, the twentieth step ST20 determining whether the fuel can be cut off and determining whether the damper clutch can be operated; 제20단계(ST20)의 판단에 따라 엔진의 회전수를 가변 제어하는 제30단계 (ST30)를 포함하는 무단변속기 장착 차량의 변속 제어방법.And a thirtieth step (ST30) for variably controlling the engine speed according to the determination of the twenty step (ST20). 청구항 1에 있어서, 상기 제30단계(ST30)는 상기 제20단계(ST20)에서 댐퍼 클러치 작동 및 연료차단 가능 상태로 판단된 경우, 엔진 회전수를 높게 제어하는 제31단계(ST31)를 포함하는 무단변속기 장착 차량의 변속 제어방법.The method of claim 1, wherein the thirty-stage step ST30 includes a thirty-seventh step ST31 for controlling engine speed to be high when it is determined that the damper clutch is operated and the fuel cutoff is possible in the twentieth step ST20. Shift control method for a vehicle with continuously variable transmission. 청구항 2에 있어서, 상기 제31단계(31)는 목표 터빈 회전수에 α만큼 더한 회전수로 터빈을 제어하는 무단변속기 장착 차량의 변속 제어방법.The shift control method according to claim 2, wherein the thirty-first step (31) controls the turbine at a revolution speed added by α to the target turbine revolution speed. 청구항 1에서 상기 제30단계(ST30)는 상기 제20단계에서 댐퍼 클러치 비작동 및 연료차단 불가능 상태로 판단된 경우, 엔진 회전수를 낮게 제어하는 제32단계 (ST32)를 포함하는 무단변속기 장착 차량의 변속 제어방법.The continuously variable transmission vehicle of claim 1, wherein the thirty-stage step ST30 includes a thirty-second step ST32 for controlling the engine speed low when it is determined that the damper clutch is inoperative and incapable of shutting off the fuel in the twentieth step. Shift control method. 청구항 4에 있어서, 상기 제32단계(ST32)는 스로틀 개도 0%인 목표 터빈 회전수가 연료차단 해제 회전수보다 낮게 설정되어 있는 목표 변속비 맵의 회전수로 터빈을 제어하는 무단변속기 장착 차량의 변속 제어방법.The shift control of the CVT-based vehicle according to claim 4, wherein the 32-step step ST32 controls the turbine at the rotation speed of the target transmission ratio map in which the target turbine rotational speed with a throttle opening degree of 0% is set lower than the fuel cutoff release rotation speed. Way.
KR10-2001-0080545A 2001-12-18 2001-12-18 Shift control method of continuous variable transmission vehicles KR100412708B1 (en)

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KR950017386A (en) * 1993-12-29 1995-07-20 전성원 Damper clutch operation status judgment device of automatic transmission and its method
KR19990059541A (en) * 1997-12-30 1999-07-26 최진호 Massager using a vacuum cleaner
KR19990075267A (en) * 1998-03-18 1999-10-15 정몽규 Mutual control method through data bus of Lee C and T C during deceleration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950017386A (en) * 1993-12-29 1995-07-20 전성원 Damper clutch operation status judgment device of automatic transmission and its method
KR19990059541A (en) * 1997-12-30 1999-07-26 최진호 Massager using a vacuum cleaner
KR19990075267A (en) * 1998-03-18 1999-10-15 정몽규 Mutual control method through data bus of Lee C and T C during deceleration

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