KR890004050B1 - Automatic transmission system for vehicles - Google Patents

Abstract

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Description

Automotive automatic transmission

1 is a block diagram of one embodiment of the present invention.

2 is a characteristic diagram showing shift characteristics by the first and second map calculators shown in FIG.

3 is a block diagram showing a modification of the embodiment shown in FIG.

4 is a block diagram of another embodiment of the present invention.

5 is a flowchart of a control program executed in the microcomputer of the FIG.

* Explanation of symbols for main parts of the drawings

1,21: vehicle transmission 4: transmission

5: acceleration detector 6: vehicle speed detector

8: operation speed detector 9: control operation unit

10: first map calculator 11: second map calculator

12: changeover switch A: acceleration signal

V: Vehicle speed signal D: Discrimination signal.

The present invention relates to an automatic transmission for a vehicle in which a shift control is automatically performed according to the driving state of the vehicle at that time.

Conventionally, a shift device configured to change a shift state in response to an electrical signal and a shift change map for determining a shift state according to a shift speed operation amount and a vehicle speed are formed. Various automatic transmission devices for vehicles configured to perform the shift control of the transmission device in accordance with the calculation result have been proposed in various ways. However, if the shift shift position of the transmission is determined solely by the operation amount of the accelerator pedal and the vehicle speed, for example, when the accelerator pedal is accelerated by force, and then the accelerator pedal is returned, the transmission shifts up and the shift is shifted up. The reduction ratio was small so that there was no problem because of what is usually called fuel economy. However, because it is easy to apply the engine brake, even when the accelerator pedal is restored, it is also inconvenient and dangerous to shift up. In addition to the above, there is a request to implement rapid acceleration, shift up, and the like depending on the degree to which the accelerator pedal is pressed hard. However, in the conventional type of such a device, the shift cannot be shifted to the intended shift position of the driver.

It is therefore an object of the present invention to provide an automatic transmission for a vehicle that enables shift change control of a vehicle transmission that operates in response to an electrical signal as the driver intends.

The present invention provides a vehicle transmission configured to change a shift state in response to an electric signal, means for outputting a second signal relating to an operation amount of an accelerator pedal, and an operation speed of an accelerator pedal in response to the second signal. Means for outputting a third signal and means for outputting a fourth signal representing the most suitable shift state at that time in response to the first to third signals, and according to the fourth signal, It is characteristic in that it can be.

According to the above-described configuration, since the shift state of the vehicle transmission is determined in consideration of the operation speed of the accelerator pedal, a request for a rapid acceleration engine brake or the like can be discriminated from the operation speed of the accelerator pedal, and the driver's intention is Therefore, shift control of the transmission can be automatically performed.

As described above, since the shift shift of the transmission can be freely operated to some extent in accordance with the operation of the acceleration delivery, the driving operation can be remarkably improved.

Next, the present invention according to the illustrated embodiment will be described in detail.

1 shows an embodiment of an automatic transmission for a vehicle according to the present invention. The vehicle automatic transmission 1 includes a transmission 4 disposed between the vehicle internal combustion engine 2 and the wheel drive device 3, and is configured to automatically perform the shift change control. The transmission 4 is configured to obtain a necessary shift state in response to an electric signal applied from the outside, and as such a transmission, for example, a conventional gear type transmission is combined with an actuator for gear change. The device can be used.

In order to obtain a condition signal for determining the shift timing of the transmission 4, the apparatus 1 includes an acceleration detector 5 and a vehicle speed detector 6. The acceleration detector 5 is connected to the accelerator pedal 7 and outputs an acceleration signal A according to the operation amount of the accelerator pedal 7, while the vehicle speed detector 6 is driven by the internal combustion engine 2 (not illustrated). Outputs the vehicle speed signal V indicating the speed of). The acceleration signal A has been applied to the operation speed detector 8, where the operation speed of the accelerator pedal 7, that is, the speed of change of the operation amount of the acceleration pedal 7, has been calculated based on the acceleration signal A. A first map calculating section 10 and a second map calculating section 11 are provided to map a shift position of the acceleration transmission device 4. The first map calculating section 10 calculates which of the shift positions 1, ll and III is most suitable at that time according to the shift characteristic indicated by the solid line in the plane of FIG. 2, and the calculation result is the first control output CS. Output as ₁ . The second map calculation section (II) calculates which of the shift positions 1, ll, and III is the most suitable shift position at that time according to the shift characteristic indicated by the dotted line in the second drawing, and the calculation result is the second control output CS. _It is output as ₂ . As can be seen from the second road, the shift characteristic of the second map calculating section 11 is determined so that the gear shift occurs in a larger vehicle speed state than the shift characteristic of the first map calculating section 10 when the same acceleration operation amount is achieved. In other words, the shift characteristic of the first map calculating section 10 is determined to improve the fuel economy (the number of kilos that can travel at 11 fuel years). On the other hand, the shift characteristics other than the second map calculation section 11 are determined so as to obtain a larger driving torque.

The first control output CS ₁ and the second control output CS ₂ are input to the selection switch 12 controlled to be switched by the discrimination signal D. When the level of the discrimination signal D is " L ", the selector switch 12 is switched like a solid line, and the first control output CS ₁ is output as the output from the control operation unit 9, while the plate signal D When the level is "H", the selector switch 12 is switched like a dotted line, and the second control output CS ₂ is output as the output from the control operation unit 9. Input to the first control output CS ₁ or the second control output CS ₂ transmission 4 output from the selection switch 12 as a shift control signal. The gear shift position of the transmission 4 is controlled in accordance with the signal output from the control computing section 9.

As a result, the operation of the acceleration delivery 7 is performed relatively slowly, and when the level of the discrimination signal D is "L", the fuel economy type is reduced in accordance with the characteristic shown by the solid line in FIG. Gear shift control was executed. However, when the accelerator pedal 7 is pressed rapidly, the level of the discriminating signal D becomes "H", and the selection switch 12 is switched as indicated by the dotted line, and the second map calculating section 11 causes the second. The gear shift control of the high output torque was performed according to the characteristic shown by the dotted line in the figure. Therefore, if the gear position is different according to the current gear position and the calculation result of the second map calculation unit 11, the gear change is made according to the second control output CS ₂ . The vehicle can be driven. When the efficiency of the accelerator pedal 7 becomes less than the predetermined value, the level of the discrimination signal D becomes 'L' again, and returns to the fuel economy type shifting characteristic in accordance with the characteristic shown by the solid line in FIG. For the first time, only the first gear selection is important, and after that, it is desirable to control according to the characteristics of the fuel economy type.

In addition, even if the accelerator pedal 7 is hayeoteul rapidly returns, the level of the discrimination signal D is in "H ', it is possible to control the transmission in accordance with the second control output CS _2.

As a result, it becomes easier to apply the brake of the engine. In this way, the shift control pattern is changed in consideration of the change in the amount of operation of the accelerator pedal 7, so that the gear shift of the shift position 4 can be performed in accordance with the driver's intention in response to the acceleration operation for rapid acceleration and engine brake. Can significantly improve the operation.

In the above embodiment, in order to change the characteristics of the gear change control of the transmission 4, two map calculation units are provided. However, as shown in FIG. 3, for example, the output side of the first map calculation unit 10 is provided. The correction unit 13 is provided in the above, and the first control output CS ₁ from the first map calculation unit 10 is corrected according to the state of the discrimination signal D at that time, and the gear change characteristic is changed accordingly. good.

Incidentally, the correction means is not limited to the circuit of FIG. The correction may be made according to the configuration of other prior art. In addition, in FIG. 3, the same code | symbol is attached | subjected to the part same as FIG. 2, and description is abbreviate | omitted.

4 shows another embodiment of a vehicle transmission according to the present invention. The vehicle transmission 21 has a control unit 22 that includes a microcomputer (not illustrated), and includes an acceleration signal A and an overspeed signal V from the acceleration detector 5 and the vehicle speed detector 6. In response, the output control signal 5 for controlling the transmission 4 is configured to be output from the control unit 22.

의 변화속도

'를 계산하여 (스탭 32),

값의 정부의 판별을 할 수 있다(스탭 33).5 shows a flowchart of a control program stored in a microcomputer (not shown) in the control unit 22. As shown in FIG. Referring to this flowchart, after the star art of the program, first, the staff 31 can determine whether or not the value of the acceleration operation amount t-1 is approximately 0, and waits for this determination result to be NO. 31) If the determination result is NO, the acceleration operation amount

Rate of change

'(Step 32),

The government can determine the value (step 33).

' ≥0의 경우에는 다시금, 스탭(34)에서 달의 값이 예정치 X1 이상인지 아닌지의 판별을 할 수 있으며, 판별결과가 NO인 경우에는 제 2도에 실선으로 나타낸 변속특성에 따라서 제 1기어시프트 젝 연산을 실시할 수 있다. (스탭 35) 한편, 스탭(34)에 있어서의 판별결과가 YES인 경우에는 제 2도에서 점선으로 나타낸 변속 특성에 따라서 제 2기어 시프트 첵 연산을 할 수 있다(스탭 36). 스탭(37)에서는 현재의 기어위치와 스탭 35또는 36에서의 연산에 의하여 수득한 기어위치와의 비교를 하여, 양자가 상호다를때는 실제의 기어위치가 스 탭 35 또는 36에서의 연산에 의하여 수득한 기어위치가 되도록 기어체인지 조작이 실행되고(스탭 38). 재차 스탭 (31)으로 복귀한다.

If ≥ 0, again, the step 34 can determine whether or not the moon value is greater than or equal to the predetermined value X1. If the determination result is NO, the first characteristic is determined according to the shift characteristic indicated by the solid line in FIG. Gear shift jet calculation can be performed. (Step 35) On the other hand, when the determination result in the step 34 is YES, the second gear shift 첵 operation can be performed in accordance with the shift characteristic indicated by the dotted line in Fig. 2 (step 36). The step 37 compares the current gear position with the gear position obtained by the calculation at step 35 or 36, and when the two are different, the actual gear position is obtained by the calculation at step 35 or 36. The gear change operation is performed so as to be in one gear position (step 38). It returns to the staff 31 again.

'<0이며, 따라서 스탭(33)의 판별결과가 NO로 되면,

'의 갑이 부의 예정값 X.본다 작은지 아닌지의 판별을 할 수 있다(스탭 39) . 이 판별결과가 YES인 경우, 즉 가속궤달(7)의 조작량의 변화속도가 부의 예정값 X₂보다 더욱 부의 방향으로 클 경우에는 스탭(31)에 복귀하여, 그 현재의 기어위치를 확보한다. 즉 가속쾌달을 급격히 복귀하였을 경우에는 운전자는 통상 엔진브레이크를 기는 것을 바라고 있으며, 따라서 가속페달(7)의 조작량이 작아져도 그 기어 위치를 확보하여 기어의 시프트다운을 하지 않고, 그 기어의 위치에서 멎게하여 엔진브레이크를 걸게된다.

'<0, therefore, if the determination result of the staff 33 is NO,

The negative value of X's negative value is determined. (Step 39). If this determination result is YES, that is, if the speed of change of the manipulated variable of the acceleration control 7 is larger in the negative direction than the negative predetermined value X ₂ , it returns to the step 31 and secures the current gear position. In other words, when the acceleration and recovery suddenly returns, the driver generally wishes to apply the engine brake. Therefore, even if the operation amount of the accelerator pedal 7 becomes small, the driver does not shift the gear by securing the position of the gear and at the position of the gear. The engine brakes are applied by tightening.

'<0의 경우에는 스탭(35)에 진행하여, 제 2도중 실선으로 나타낸 변화특성으로 기어체인지를 실행할 수 있게 된다.

In the case of &quot;<0, the process proceeds to the step 35, whereby the gear change can be executed with the change characteristic indicated by the solid line in the second diagram.

According to such a configuration, when the accelerator pedal 7 is pushed down vigorously, it is converted to a shift characteristic to obtain a larger torque output, while the operation of releasing the accelerator pedal 7 suddenly causes the engine brake to be released. I can hang it.

According to the present invention, since the gear shift position is suppressed in consideration of the change speed of the operation speed of the accelerator pedal in addition to the operation speed of the vehicle speed and the accelerator pedal, as described above, the gear engine can be operated according to the intention of the driver. Operational operation can be significantly improved.

Claims (1)

A vehicle transmission configured to change a shift state in response to an electrical signal, an acceleration detector 5 for outputting an acceleration signal A related to the vehicle speed, and a vehicle speed detector for outputting a vehicle speed signal V in relation to an operation amount of the accelerator pedal. (6) and an operation speed detector 8 for outputting a discrimination signal D indicating an operation speed of the acceleration delivery in response to the vehicle speed signal V and then in response to the aforementioned acceleration signal A, the vehicle speed signal V and the discrimination signal D. And a control unit 22 for outputting an output control signal S indicative of the most suitable shift state at that time, wherein the vehicle transmission is controlled in accordance with the output control signal S.

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