KR100235014B1 - How to operate engine brake of automatic transmission - Google Patents
How to operate engine brake of automatic transmission Download PDFInfo
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- KR100235014B1 KR100235014B1 KR1019950066578A KR19950066578A KR100235014B1 KR 100235014 B1 KR100235014 B1 KR 100235014B1 KR 1019950066578 A KR1019950066578 A KR 1019950066578A KR 19950066578 A KR19950066578 A KR 19950066578A KR 100235014 B1 KR100235014 B1 KR 100235014B1
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- brake
- switch
- output shaft
- automatic transmission
- sensor
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
Classifications
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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
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
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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 Transmission Device (AREA)
Abstract
본 발명은 자동변속기의 엔진브레이크 작동방법에 관한 것으로, 브레이크 스위치(SW3)로부터 검출된 브레이크량이 0.3 G(No≒387.67)보다 크거나 같을 때 PG-B센서(5)로부터 변속기 출력축의 회전수(No)의 변화량을 연산하는 단계와, 브레이크의 작동상태를 확인하기 위해 브레이크스위치(SW3)로부터 브레이크 스위치 온 신호가 입력되는지를 판단하고, 악셀 스위치(SW2)로부터 악셀러레이터 페달의 전폐를 확인하기 위해 악셀 스위치 온 신호가 입력되는지를 판단하는 단게와, 상기 PG-B센서(5)로부터 검출된 출력축의 회전수가 소정범위 내에 있는 지를 판단하는 단계와, 위의 조건이 만족되었을 때 기존의 파우어모드 오프시 다운 쉬프트 제어패턴을 사용하여 변속제어를 수행하는 단계로 이루어진다. 본 방법에 의하면, 자동변속기시스템에서 PG-B센서로부터 검출된 출력축 회전수 및 브레이크 스위치로부터 검출한 브레이크량에 따라 자동적으로 O/D ON→OFF 및 O/D OFF시 ＂D＂→＂2＂기어단으로 자동변속이 이루어져 엔진브레이크가 작동될 수 있는 효과가 있다.The present invention relates to a method of operating an engine brake of an automatic transmission, wherein the rotation speed of the transmission output shaft from the PG-B sensor (5) when the amount of brake detected from the brake switch (SW3) is greater than or equal to 0.3 G (No 387.67). Calculating the amount of change of No), judging whether the brake switch on signal is input from the brake switch SW3 to confirm the operating state of the brake, and confirming the total closing of the accelerator pedal from the accelerator switch SW2. Determining whether an accelerator switch on signal is input, determining whether the rotational speed of the output shaft detected by the PG-B sensor 5 is within a predetermined range, and when the above conditions are satisfied, the existing power mode The shift shift control is performed by using the down shift control pattern when off. According to this method, when the automatic transmission system detects O / D ON → OFF and O / D OFF automatically according to the output shaft rotation speed detected from the PG-B sensor and the brake amount detected from the brake switch, D ＂→＂ 2 ＂ There is an effect that the automatic brake is made to the gear stage can operate the engine brake.
Description
제1도는 본 발명의 방법이 적용되는 자동변속기 제어시스템의 구성도.1 is a block diagram of an automatic transmission control system to which the method of the present invention is applied.
제2도는 종래의 파우어모드 오프시 다운 쉬프트 제어패턴을 나타내는 그래프.2 is a graph showing a downshift control pattern when a conventional power mode is off.
제3도는 종래의 엔진브레이크시 변속제어패턴을 나타낸 그래프.3 is a graph showing shift control patterns in a conventional engine brake.
제4도는 본 발명의 방법에 의한 엔진브레이크시 변속제어패턴을 나타낸 그래프.4 is a graph showing a shift control pattern during engine brake according to the method of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
2 : 차속센서 5 : 출력축회전수 감지센서2: vehicle speed sensor 5: output shaft rotation speed sensor
10 : 자동변속기 전자제어장치 12 : 유압제어기구10: automatic transmission electronic control device 12: hydraulic control mechanism
SW1 : 오버드라이브 스위치 SW2 : 악셀러레이터 스위치SW1: Overdrive Switch SW2: Accelerator Switch
SW3 : 브레이크 스위치 SS : 변속신호SW3: Brake switch SS: Shift signal
본 발명은 자동변속기의 엔진브레이크 작동방법에 관한 것으로, 특히 변속기 출력축 회전수와 브레이킹 량에 따라 자동으로 엔진브레이크가 작동될 수 있는 자동변속기의 엔진브레이크 작동방법에 관한 것이다.The present invention relates to a method for operating an engine brake of an automatic transmission, and more particularly to a method for operating an engine brake of an automatic transmission in which the engine brake can be automatically operated according to the output shaft rotation speed and the amount of braking.
근래 승용차는 물론 버스등 대형차량에까지 운전편의성을 도모하기 위해 자동변속기를 채용하고 있다. 통상, 4단 자동변속기를 장착한 차량이 'D'(4속)레인지로 주행중에 계속적인 내리막길이나 굴곡이나 심한 길을 운전할 때는 변속레버를 'L' 레인지로 쉬프트 다운(shift down)시켜 엔진브레이크 효과를 얻고 있다. 즉, 'L'레인지로 변속하면 4속→3속, 3속→2속, 2속→1속으로 다운 쉬프트되며, 이러한 하향 변속은 제3도에 나타낸 바와 같은 미리 설정된 쉬프트 패턴에 따라 이루어진다.In recent years, automatic transmissions have been adopted to promote driving convenience not only for passenger cars but also for large vehicles such as buses. In general, when a vehicle equipped with a four-speed automatic transmission drives a continuous downhill, bend or severe road while driving in the 'D' (four-speed) range, the shift lever is shifted down to the 'L' range to lower the engine. Getting a brake effect. That is, when shifting to the 'L' range, downshifting is performed in the 4th speed to the 3rd speed, the 3rd speed to the 2nd speed, the 2nd speed and the 1st speed.
또한, 오버드라이브 기능을 가진 변속기에서 운전자가 오버드라이브 스위치를 온에서 오프 위치로 선택했을 때도 제3도의 A, B선 이하에서 운전자의 변속레버 조작에 따라 엔진브레이크가 작동된다.In addition, when the driver selects the overdrive switch from the on-off position in the transmission with the overdrive function, the engine brake is operated in accordance with the driver's shift lever operation below the A and B lines of FIG.
이와 같은 'L'레인지로의 수동변속조작은 자동변속기를 장착한 자동차의 운전편의성을 저감시키는 하나의 문제점으로 나타난다.This manual shift operation to the 'L' range appears as a problem to reduce the driving convenience of the vehicle equipped with an automatic transmission.
따라서, 본 발명은 이와 같은 문제점을 해결하기 위해 안출된 것으로, 자동변속기를 장착한 자동차에서 변속레버를 사용하지 않고서도 변속단을 쉬프트 다운시켜 엔진브레이크가 작동될 수 있게 한 자동변속기의 엔진브레이크 작동방법을 제공하는 데 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, the engine brake operation of the automatic transmission in which the engine brake can be operated by shifting down the shift stage without using the shift lever in a vehicle equipped with an automatic transmission. The purpose is to provide a method.
본 발명에 의하면, 자동변속기 장착차량에서 브레이크량 및 변속기출력축 회전 수등을 판단하여 4속→3속 및 3속→2속 다운쉬프트를 오버드라이브 스위치의 온에서 오프 조작시 및 오버드라이브 스위치 오프상태에서 ＂D＂→＂2＂로 변속조작시와 같은 효과를 얻는 자동 엔진브레이크 작동방법을 제공함으로써 자동변속기의 운전편의성을 증대시킬 수 있게 된다.According to the present invention, in a vehicle equipped with an automatic transmission, the brake amount and the number of rotations of the output shaft of the transmission are judged to determine whether the 4th speed → 3rd speed and the 3rd speed → 2nd speed downshift is operated at the time of turning off the overdrive switch and at the overdrive switch off state. By providing an automatic engine brake operation method that achieves the same effect as shifting operation from D2 to D2, it is possible to increase the operation convenience of the automatic transmission.
이하 첨부도면을 참고하여 본 발명의 일 실시예에 대해 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 발명이 적용되는 자동변속기 제어시스템을 나타낸 것으로서, 통상적으로 차속센서(2)의 출력과, 변속기 출력축의 회선수를 검출하는 펄스발생기(PG-B)의 출력과, 오버드라이브 온/오프 스위치(SW1), 악셀 스위치(SW2) 및 브레이크 스위치(SW3)의 출력이 자동변속기제어장치(TCU; 10)의 입력단에 연결되며,그 출력단에 자동변속기(13)의 밸브보디내 유압제어기구(12)가 전기적으로 연결된 것이다. 유압제어기구(12)내의 솔레노이드 밸브의 개폐동작에 의해 댐퍼클러치제어, 기어변속제어, 유압제어 동작이 이루어진다.1 shows an automatic transmission control system to which the present invention is applied, and typically, the output of the vehicle speed sensor 2, the output of the pulse generator PG-B for detecting the number of lines of the transmission output shaft, and the overdrive on / off. The outputs of the off switch SW1, the accelerator switch SW2 and the brake switch SW3 are connected to the input terminal of the automatic transmission control unit TCU 10, and the hydraulic control mechanism in the valve body of the automatic transmission 13 is connected to the output terminal thereof. (12) is electrically connected. Damper clutch control, gear shift control, and hydraulic control operation are performed by the opening and closing operation of the solenoid valve in the hydraulic control mechanism 12.
상기 자동변속기제어장치(10)는 내부에 기억된 프로그램에 의해 입력단의 센서 입력신호를 연산하고 산출된 값에 반응하여 유압제어기구(12)에 밸브제어신호를 인가한다.The automatic transmission control device 10 calculates a sensor input signal at the input stage by a program stored therein and applies a valve control signal to the hydraulic control mechanism 12 in response to the calculated value.
본 발명은 상기 PG-B센서(5)로부터 검출된 출력축 회전수 및 브레이크 스위치(SW3)로부터 검출한 브레이크량에 따라 자동적으로 O/D ON→OFF 및 O/D OFF→＂2＂ 기어단으로 엔진브레이크가 작동되게 하는 방법을 제공하기 위한 것이다.The present invention automatically shifts to O / D ON → OFF and O / D OFF → ＂2＂ gear stages according to the output shaft rotation speed detected from the PG-B sensor 5 and the brake amount detected from the brake switch SW3. It is to provide a method for operating the engine brake.
본 발명은 또한 제3도에 나타낸 것과 같은 기존의 O/D ON→OFF 및 O/D OFF→＂2＂기어단 변속제어 패턴을 사용한다.The present invention also uses the conventional O / D ON- > OFF and O / D OFF- > 2 gear stage shift control patterns as shown in FIG.
본 발명의 방법은 상기 변속기제어장치(10)에서 브레이크 스위치(SW3)로부터 검출된 브레이크량이 0.3 G(No≒ 387.67)보다 크거나 같을 때 PG-B센서(5)로부터 변속기 출력축의 회전수(No)의 변화량을 연산한 다음, 브레이크의 작동상태를 확인하기 위해 브레이크스위치(SW3)로부터 브레이크 스위치 온 신호가 입력되는 지를 판단하고, 악셀 스위치(SW2)로부터 악셀러레이터 페달의 전폐를 확인하기 위해 악셀 스위치 온 신호가 입력되는 지를 판단하고, 상기 PG-B센서(5)로부터 검출된 출력축의 회전수가 1500∼4500 rpm에 있는 지를 판단하고, 위의 조건이 만족되었을 때 제2도에 나타낸 것과 같은 기존의 파우어모드 오프시 다운 쉬프트 제어패턴을 사용하여 변속제어를 수행한다.According to the method of the present invention, when the brake amount detected from the brake switch SW3 in the transmission control device 10 is greater than or equal to 0.3 G (No 387.67), the rotation speed of the transmission output shaft from the PG-B sensor 5 (No. After calculating the amount of change of), it is judged whether the brake switch on signal is input from the brake switch SW3 to confirm the operating state of the brake, and the axel to confirm the closing of the accelerator pedal from the accelerator switch SW2. It is judged whether a switch-on signal is input, and whether the rotation speed of the output shaft detected from the PG-B sensor 5 is at 1500 to 4500 rpm, and when the above conditions are satisfied, the existing as shown in FIG. Shift control is performed using the downshift control pattern when the power mode is off.
이후 O/D ON→OFF로 오버드라이브 스위치(SW1)를 조작한 상태와 동일하게 4속→3속 다운 쉬프트가 이루어지게 밸브제어신호를 발생한다.Thereafter, the valve control signal is generated such that the 4th speed to 3rd speed downshift is performed in the same way as the overdrive switch SW1 is operated from O / D ON to OFF.
밸브제어신호는 유압제어기구(12)로 공급되고 변속기(13)의 쉬프트다운을 위한 댐퍼클러치제어 및 유압제어동작을 수행하여 소정의 기어변속이 이루어지게 된다.The valve control signal is supplied to the hydraulic control mechanism 12 and performs a damper clutch control and a hydraulic control operation for shifting down the transmission 13 to achieve a predetermined gear shift.
다시, 변속기 전자제어장치(10)는 전단계의 4속→3속 다운 쉬프트가 이루어진 것을 확인한 다음, 브레이크 스위치 온 신호 및 악셀 스위치 온 신호가 입력된 것을 판단하고, 출력축의 회전수가 1000∼2500 rpm 사이에 있는 지를 판단하여 상기한 제2도에 나타낸 것과 같은 듀티율을 가진 기존의 파우어모드 오프시 다운 쉬프트 제어패턴을 사용하여 변속제어를 수행한다.Again, the transmission electronic controller 10 confirms that the four-speed to three-speed downshift of the previous stage has been made, and then determines that the brake switch on signal and the axel switch on signal are input, and the rotation speed of the output shaft is between 1000 and 2500 rpm. The shift control is performed by using the downshift control pattern when the conventional power mode is off with the duty ratio as shown in FIG.
따라서, O/D OFF 상태에서 ＂D＂→＂2＂로 변속레버를 조작한 것과 같이 변속단의 다운 쉬프트가 이루어지도록 밸브제어신호를 발생하고, 이에 의해 엔진 브레이크 동작이 이루어진다.Therefore, the valve control signal is generated such that the downshift of the shift stage is performed as if the shift lever was operated from D to D in the O / D OFF state and thereby the engine brake operation is performed.
위와 같은 엔진브레이크 동작의 해제는 변속기전자제어장치(10)에서 브레이크 스위치 SW3가 오프로 되는 시점에서 현재의 쉬프트 패턴상 변속단을 확인하고, 즉시 적절한 변속제어를 수행함으로써 이루어진다. 단, 변속제어중인 경우에는 제어완료후 차기 제어를 수행한다.The release of the engine brake operation as described above is performed by checking the shift stage on the current shift pattern at the time when the brake switch SW3 is turned off in the transmission electronic control apparatus 10 and immediately performing appropriate shift control. However, in the case of shift control, the next control is performed after control is completed.
도면 제4도에서, 본 발명의 방법에 의해 엔진 브레이크 작동이 가능한 4속→3속 변속영역(Q)과 3속→2속 변속영역(R)을 다운 쉬프트 패턴상에 표시하였다.In FIG. 4, the 4th speed to 3rd speed shift region Q and the 3rd speed to 2nd speed shift region R, which are capable of operating the engine brake by the method of the present invention, are shown on the downshift pattern.
이상 설명한 바와 같이, 본 발명에 의하면 자동변속기시스템에서 PG-B센서로부터 검출된 출력축 회전수 및 브레이크 스위치로부터 검출한 브레이크량에 따라 자동적으로 O/D ON→OFF 및 O/D OFF시 ＂D＂→＂2＂기어단으로 자동변속이 이루어져 엔진브레이크가 작동될 수 있음으로 브레이크 작동시 제동력을 높이는 동시에 브레이크 계통 소모품의 수명을 연장시킬 수 있는 이점이 있다.As described above, according to the present invention, in the automatic transmission system, when O / D ON to OFF and O / D OFF are automatically changed according to the output shaft rotation speed detected from the PG-B sensor and the brake amount detected from the brake switch. → Because the automatic gear shift is made by the gear stage, the engine brake can be operated, which has the advantage of increasing the braking force during brake operation and extending the life of the brake system consumables.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950066578A KR100235014B1 (en) | 1995-12-29 | 1995-12-29 | How to operate engine brake of automatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950066578A KR100235014B1 (en) | 1995-12-29 | 1995-12-29 | How to operate engine brake of automatic transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970044799A KR970044799A (en) | 1997-07-26 |
| KR100235014B1 true KR100235014B1 (en) | 1999-12-15 |
Family
ID=19447409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950066578A Expired - Fee Related KR100235014B1 (en) | 1995-12-29 | 1995-12-29 | How to operate engine brake of automatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100235014B1 (en) |
-
1995
- 1995-12-29 KR KR1019950066578A patent/KR100235014B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR970044799A (en) | 1997-07-26 |
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