KR20010104486A - a sudden stsrt prevention method of a auto transmission mounted vehicle - Google Patents

a sudden stsrt prevention method of a auto transmission mounted vehicle Download PDF

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KR20010104486A
KR20010104486A KR1020000023387A KR20000023387A KR20010104486A KR 20010104486 A KR20010104486 A KR 20010104486A KR 1020000023387 A KR1020000023387 A KR 1020000023387A KR 20000023387 A KR20000023387 A KR 20000023387A KR 20010104486 A KR20010104486 A KR 20010104486A
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normal
engine speed
engine
pedal
state
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KR1020000023387A
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KR100338506B1 (en
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장준석
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류정열
기아자동차주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

본 발명은 자동변속기차량의 급발진 방지방법에 관한 것으로, 엔진제어유니트가 엔진회전수 증가율이 비정상적으로 급격히 증가되면 급발진상태로 파악하여, 연료를 차단하고 점화를 억제하여 엔진의 회전수를 정상상태로 복귀시킴으로써 차량이 급발진되지 않도록 된 것으로서, 주행중 발생되는 급발진현상과 급발진시의 엔진과열을 방지할 수 있을 뿐만 아니라 급발진방지를 위한 별도의 장치가 필요치 않게 된다.The present invention relates to a method for preventing sudden start of an automatic transmission vehicle. When the engine speed increase rate of the engine speed is abnormally sharply increased, the engine control unit recognizes the sudden start state, shuts off the fuel and suppresses ignition so that the engine speed is returned to a normal state. By returning, the vehicle is not suddenly started, which prevents the rapid start phenomenon and the engine overheating during the sudden start, and does not require a separate device for preventing the sudden start.

Description

자동변속기차량의 급발진 방지방법{a sudden stsrt prevention method of a auto transmission mounted vehicle}{A sudden stsrt prevention method of a auto transmission mounted vehicle}

본 발명은 자동변속기차량의 급발진 방지방법에 관한 것으로, 특히 변속기에 쉬프트록(shift-lock)장치를 추가로 설치하지 않고도 차량이 급발진되는 것을 방지할 수 있도록 된 자동변속기차량의 급발진 방지방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing sudden start of an automatic transmission vehicle, and more particularly, to a method for preventing sudden start of an automatic transmission vehicle that can prevent a vehicle from starting suddenly without additionally installing a shift-lock device in the transmission. will be.

일반적으로 자동차는 운전자의 운전조작에 의하여 정상적인 기계작동을 통하여 진행 및 정지하도록 되어 있으나, 근래에 들어 자동차에 전자제어장치들이 많이 장착되면서 경우에 따라 오작동을 일으켜 차량이 급가속 전진되는 급발진 현상이 자주 발생하고 있으며, 이 급발진 현상은 운전자가 전혀 예측치 못한 상황에서 돌발적으로 발생되는 것이므로 운전자가 방어조작을 실행할 만한 시간적 여유가 없어서 치명적 상황에 처하는 경우가 많고, 차량도 크게 손상된다.In general, a car is driven and stopped through normal mechanical operation by a driver's driving operation. However, in recent years, a lot of electronic control devices are installed in a car, causing malfunction in some cases. This sudden rash occurs suddenly when the driver is completely unforeseen, so the driver often does not have enough time to perform defensive operations and is in a fatal situation, and the vehicle is also seriously damaged.

따라서, 종래의 자동변속기 장착차량에서는 브레이크페달을 밟지 않고 시동을 걸 경우 기어가 변속되지 않도록 하는 쉬프트록장치를 별도로 설치하여 엔진의 출력이 구동축으로 전달되지 않게 함으로써 차량의 급발진을 방지하고 있다.Therefore, in a conventional vehicle equipped with an automatic transmission, a shift lock device is installed to prevent the gear from shifting when the vehicle is started without stepping on the brake pedal to prevent the engine output from being transmitted to the drive shaft, thereby preventing sudden starting of the vehicle.

그러나, 상기와 같은 방법으로는 시동시가 아닌 주행중에 발생하는 급발진사고는 막을 수 없으며, 기어의 변속만 이루어지지 않도록 하는 것이므로 회전수가 급상승되어 엔진이 과열됨으로써 발생하는 손상도 예방할 수 없다는 문제점이 있었다. 또한, 쉬프트록을 별도로 추가장착하는 것이므로 추가비용이 발생되는 또 다른문제점이 있었다.However, the above-described method does not prevent sudden accidents occurring during driving, but not at start, and does not prevent gear shifting. Therefore, the rotational speed is increased so that damage caused by engine overheating cannot be prevented. . In addition, since the shift lock is additionally installed, there is another problem of additional cost.

이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명된 것으로, 엔진작동에 근거하여 급발진상황을 판단하고 직접 엔진을 제어하여 급발진현상을 방지하게 됨으로써 엔진손상을 방지할 수 있을 뿐만 아니라 별도의 추가장치의 적용이 필요없도록 된 자동변속기차량의 급발진 방지방법을 제공함에 그 목적이 있다.Therefore, the present invention was invented to solve the above problems, and it is possible to prevent the engine damage by judging the rapid start situation based on the engine operation and to prevent the sudden start phenomenon by directly controlling the engine. The object of the present invention is to provide a method for preventing sudden start and departure of an automatic transmission vehicle, which does not require the application of the.

도 1은 본 발명에 따른 자동변속기차량의 급발진 방지방법을 나타낸 순서도이다.1 is a flowchart illustrating a sudden start prevention method of an automatic transmission vehicle according to the present invention.

-도면중 부호의 설명-Explanation of symbols in the drawing

Sbrake=0 : 브레이크페달 밟지 않음,S brake = 0: do not press the brake pedal,

Saccel=0 : 액셀페달 밟지 않음,S accel = 0: do not press the accelerator pedal,

Saccel=1 : 액셀페달 밟음,S accel = 1: accelerator pedal stepped,

N : 엔진회전수,N: engine speed,

Nlimit: 급발진모드에서의 제한 엔진회전수,N limit : limited engine speed in rapid start mode,

ΔN : 엔진회전수 증가율,ΔN: engine speed increase rate,

ΔNemg: 급발진상태의 엔진회전수 증가율, ΔN emg : The engine speed increase rate in the sudden start state,

Semg=1 : 급발진모드 전환출력,S emg = 1: Rapid oscillation mode switching output,

Semg=0 : 정상모드 전환출력,S emg = 0: normal mode switching output

Scut(fuel)=1 : 연료차단출력,S cut (fuel) = 1: fuel cut output,

Scut(ig)=1 : 점화억제출력.S cut (ig) = 1: Ignition suppression output.

상기와 같은 목적을 달성하기 위한 본 발명은, 브레이크페달과 액셀페달이 밟혔는지 밟히지 않았는지를 인식하는 페달조작상태 인지단계와, 엔진회전수 증가율을 계산하여 급발진상태 여부를 판단하는 급발진판단단계와, 급발진일 경우 연료공급을 차단하고 점화를 억제하며 경고표시를 하는 급발진모드 제어단계와, 엔진회전수가 정상상태로 복귀되었는지를 판단하는 정상작동여부 판단단계와, 난기 아이들 운전상태를 유지하는 백업모드단계와, 브레이크페달과 액셀페달의 조작상태를 판단하는 페달조작상태 재인지단계 및 정상모드로 전환하는 정상모드전환단계로 이루어져 있다.The present invention for achieving the above object, the pedal operation state recognition step for recognizing whether the brake pedal and the accelerator pedal is stepped on, and the sudden start and stop judging step of determining whether or not the sudden start state by calculating the engine speed increase rate; In case of a sudden start, the sudden start mode control step of shutting off fuel supply, suppressing ignition and displaying a warning, a normal operation step determining whether the engine speed has returned to a normal state, and a backup mode maintaining a warm idle state And a pedal operation state recognizing step for judging the operating states of the brake pedal and the accelerator pedal, and a normal mode switching step for switching to the normal mode.

이하, 본 발명을 첨부된 순서도를 참고하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying flowchart.

본 발명은 브레이크페달과 액셀페달이 밟혔는지 밟히지 않았는지를 인식하는 페달조작상태 인지단계와; 이 페달조작상태 인지단계에서 인지한 페달조작상태가 브레이크페달을 밟았거나 또는 액셀페달을 밟지 않았을 경우(OR조건)에 엔진회전수를 감지하고 그 증가율을 계산하여 정상정도 이상의 값으로 설정된 회전수증가율과 비교하함으로써 엔진의 급발진상태 여부를 판단하는 급발진판단단계와; 이 급발진판단단계에서 급발진상황으로 판정되었을 경우 연료공급을 차단하고 점화를 억제하여 엔진의 회전수를 감소시키며 고장신호를 발생시키는 급발진모드 제어단계와; 엔진회전수를 감지하고 급발진모드에서의 설정된 엔진회전수 제한값과 비교하여 감지회전수가 제한값에 비해 크면 급발진모드를 유지하고, 작으면 상기 급발진모드 제어단계에서 엔진회전수가 감소되어 엔진이 정상상태로 복귀된 것으로 판단하는 정상작동여부 판단단계와; 이 정상작동여부 판단단계에서 엔진이 정상상태인 것으로 판단되면 난기 아이들상태로 엔진을 제어하는 백업모드단계와; 이 백업모드단계의 운전상태를 유지하면서 브레이크페달과 액셀페달의 조작상태를 다시 감지하는 페달조작상태 재인지단계 및; 이 페달조작상태 재인지단계에서 브레이크페달을 밟지 않은 상태에서 액셀페달이 밟히면(AND조건) 엔진을 보통의 정상상태로 제어하도록 된 정상모드로 전환하는 정상모드 전환단계로 이루어져 있다.The present invention provides a pedal operation state recognition step of recognizing whether the brake pedal and the accelerator pedal are pressed or not; When the pedal operation state recognized in the pedal operation state recognition step is stepped on the brake pedal or the accelerator pedal is not pressed (OR condition), the engine speed is detected and the increase rate is set to a value higher than normal by calculating the increase rate. A sudden start judging step of determining whether the engine is in a sudden start state by comparing with the first and second start states; A sudden start mode control step of stopping the fuel supply, suppressing ignition to reduce the engine speed and generating a failure signal when it is determined that the sudden start situation is occurred in the sudden start determination step; When the engine speed is detected and compared with the set engine speed limit value in the rapid start mode, if the detected speed is greater than the limit value, the engine start mode is maintained, and if the engine speed is low, the engine speed is decreased in the rapid start mode control step and the engine returns to the normal state. Determining whether it is in normal operation or not; A backup mode step of controlling the engine to a warm idle state when it is determined that the engine is in a normal state in the normal operation determination step; A pedal operation state recognizing step of detecting the operating state of the brake pedal and the accelerator pedal again while maintaining the operation state of the backup mode step; In this pedal operation state recognition phase, if the accelerator pedal is pressed without the brake pedal pressed (AND condition), it is composed of the normal mode switching step of switching the engine to the normal mode to control the engine to the normal steady state.

따라서, 브레이크페달을 밟았거나 또는 액셀페달을 밟지 않은 상태로서 정지나 감속주행시 또는 가속주행의 의사가 없는데도 불구하고 엔진의 회전수 증가율이 급격히 증대되면 엔진제어유니트(ECU)의 엔진제어모드가 급발진모드로 전환되어 연료공급을 중지하고 점화를 억제함으로써 엔진의 회전수가 더 이상 증가하지 않도록 하여 차량이 급발진되지 않게 함으로써 사고를 미연에 방지할 수 있게 된다.Therefore, if the engine speed increases rapidly while the brake pedal is pressed or the accelerator pedal is not pressed and the driver is not intent to stop, decelerate, or accelerate the vehicle, the engine control mode of the engine control unit (ECU) is suddenly started. It is possible to prevent accidents by stopping the fuel supply and suppressing ignition so that the engine speed no longer increases and the vehicle does not start suddenly.

이후 엔진의 회전수가 정상상태로 돌아와도 난기아이들 운전상태를 한동안 유지하다가 운전자가 안심하고 가속페달을 조작하여 가속주행의사를 표시하기 전까지는 정상적인 엔진제어모드로 전환되지 않으므로 재급발진의 염려가 없게 된다.Thereafter, even when the engine speed returns to the normal state, the idle children remain in the driving state for a while, and the driver does not switch to the normal engine control mode until the driver expresses the intention to drive the accelerator pedal in peace, so there is no fear of sudden start.

한편, 저온에서의 시동 및 엔진난기를 위해 운전자가 임의로 엔진회전수를급격하게 상승시키는 조작을 할 때 급발진모드로 전환되지 않도록 급발진판단을 위한 엔진회전수 증가율의 설정값을 정상상태에서 운전자의 조작에 의해 상승가능한 회전수 증가율보다는 높게 설정해두는 것이 필요하다.On the other hand, when the driver arbitrarily raises the engine speed suddenly for starting at low temperature and engine warmth, the driver's operation in the normal state is set so that the engine speed increase rate for the sudden start determination is not switched to the sudden start mode. It is necessary to set higher than the rate of increase of the speed which can be raised by.

이상 설명한 바와 같이 본 발명에 따르면, 급발진방지작동이 기어변속의 잠금에 의한 것이 아니라 전자제어유니트에 입력된 프로그램에 의해 엔진회전수의 상승률에 근거하여 급발진상황의 판단이 이루어지고, 엔진출력을 제한함으로써 급발진방지작동이 이루어지므로 주행중 기어변속시 발생하는 급발진사고도 예방할 수 있으며, 엔진회전수의 급상승으로 인한 엔진과열로 엔진이 손상되는 현상도 방지할 수 있음은 물론, 기어변속을 막는 쉬프트록과 같은 추가장치가 설치되지 않게 되므로 비용이 절감되는 효과가 있다.As described above, according to the present invention, the sudden start prevention operation is determined not by the gear shift lock but by the program input to the electronic control unit, and the sudden start situation is determined based on the increase rate of the engine speed, and the engine output is limited. This prevents sudden start-ups that occur during gear shifting while driving, and also prevents engine damage due to overheating of the engine due to sudden increase in engine speed, as well as shift locks that prevent gear shifting. Since the same additional device is not installed, the cost is reduced.

Claims (1)

브레이크페달과 액셀페달의 조작상태를 인식하는 페달조작상태 인지단계와; 이 페달조작상태 인지단계에서 인지한 페달조작상태가 브레이크페달을 밟았거나 또는 액셀페달을 밟지 않았을 경우(OR조건)에 엔진회전수 증가율을 설정된 정상상태의 회전수증가율과 비교하여 엔진회전수 증가율이 설정값보다 클 경우 급발진상태로 판단하는 급발진판단단계와; 이 급발진판단단계에서 급발진상황으로 판정되었을 경우 연료공급을 차단하고 점화를 억제하여 엔진의 회전수를 감소시키며 고장신호를 발생시키는 급발진모드 제어단계와; 엔진회전수를 감지하고 급발진모드에서의 엔진회전수 제한값과 비교하여 감지회전수가 제한값에 비해 크면 급발진모드를 유지하고, 작으면 상기 급발진모드 제어단계에서 엔진회전수가 감소되어 정상상태로 복귀되었는지를 판단하는 정상작동여부 판단단계와; 이 정상작동여부 판단단계에서 엔진이 정상상태인 것으로 판단되면 난기 아이들상태로 엔진을 제어하는 백업모드단계와; 이 백업모드단계의 운전상태를 유지하면서 브레이크페달과 액셀페달의 조작상태를 다시 감지하는 페달조작상태 재인지단계 및; 이 페달조작상태 재인지단계에서 브레이크페달은 밟히지 않고 액셀페달이 밟히면(AND조건) 엔진을 보통의 정상상태로 제어하도록 된 정상모드로 전환하는 정상모드 전환단계로 이루어진 자동변속기차량의 급발진 방지방법.A pedal operation state recognition step of recognizing operation states of the brake pedal and the accelerator pedal; When the pedal operation state recognized in the pedal operation state recognition step is stepped on the brake pedal or not the accelerator pedal (OR condition), the engine speed increase rate is compared with the engine speed increase rate compared with the set normal speed increase rate. A sudden oscillation judging step of judging the sudden oscillation state if it is larger than the set value; A sudden start mode control step of stopping the fuel supply, suppressing ignition to reduce the engine speed and generating a failure signal when it is determined that the sudden start situation is occurred in the sudden start determination step; Detects the engine speed and compares it with the engine speed limit value in the rapid start mode to maintain the rapid start mode if the detected speed is greater than the limit value, and if it is small, determines whether the engine speed is reduced and returned to the normal state in the rapid start mode control step. Determining whether normal operation is performed; A backup mode step of controlling the engine to a warm idle state when it is determined that the engine is in a normal state in the normal operation determination step; A pedal operation state recognizing step of detecting the operating state of the brake pedal and the accelerator pedal again while maintaining the operation state of the backup mode step; In this pedal operation recognizing phase, when the brake pedal is not stepped on and the accelerator pedal is stepped on (AND condition), the automatic transmission vehicle is prevented from suddenly starting with the normal mode switching step of switching to the normal mode in which the engine is controlled to the normal normal state. Way.
KR1020000023387A 2000-05-02 2000-05-02 a sudden stsrt prevention method of a auto transmission mounted vehicle KR100338506B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030016672A (en) * 2001-08-21 2003-03-03 현대자동차주식회사 Method for rapid start control in vehicle
KR20040035984A (en) * 2002-10-14 2004-04-30 박종선 Apparatus for Preventing a Vehicle from Rapid Startng

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030016672A (en) * 2001-08-21 2003-03-03 현대자동차주식회사 Method for rapid start control in vehicle
KR20040035984A (en) * 2002-10-14 2004-04-30 박종선 Apparatus for Preventing a Vehicle from Rapid Startng

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