JPH0527358U - Vehicle automatic transmission - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] The present invention relates to an automatic transmission of a vehicle, and when the vehicle gets into a depression or mud, it is possible to escape from these by switching the clutch to manual operation. To be able to drive safely. [Structure] A clutch pedal 15 capable of operating a potentiometer 18 in a vehicle equipped with an automatic transmission.
The output from the control unit 4 to which the output of the potentiometer 18 is input allows the mechanical clutch to be manually operated in accordance with the output of the potentiometer 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides an automatic transmission for a vehicle, such as an automobile, which automatically shifts the gear ratio of gears meshing with each other according to the operating state of the engine and the vehicle speed, etc. The present invention relates to a device for manually operating a mechanical clutch for transmitting the rotation of a vehicle to a transmission.

[0002]

[Prior Art]

 FIG. 10 shows an example of a conventional automatic transmission for a vehicle of this type, which will be described below.

In the engine 1 of this vehicle, when the accelerator pedal 2 is depressed, the output of an accelerator sensor 3 that detects the amount of depression is input to a control unit 4, and based on the output from the control unit 4 according to this input. It is rotated by the injection of fuel from the injection pump 5, and the rotation state is detected by the rotation sensor 6.

On the other hand, the rotation of the engine 1 is disengaged / engaged by the mechanical clutch 7 and transmitted to the transmission 8, which is decelerated according to the gear ratio of the transmission 8 to rotate the main shaft 9 to drive the vehicle. The clutch sensor 10 detects whether the mechanical clutch 7 is engaged or disengaged.

When it is necessary to shift up the transmission 8, the clutch actuator 14 disengages the mechanical clutch 7 with the output of the control unit 4, and the gear change of the transmission 8 is performed. Further, the rotation speed of the main shaft 9 by the transmission 8 is detected by the vehicle speed sensor 11 as the speed of the vehicle.

A transmission that detects the position of the shift lever 12, the number of revolutions of the engine, the vehicle speed, and the current shift change state of the transmission 8 and shifts the transmission 8 using the output from the control unit 4. A signal from the control unit 4 is output to the transmission operating unit 13 by the output of the operating unit 13 in the shift change state or the like, and is converted into a gear ratio suitable for the state.

In such a vehicle, there is an automatic transmission for a vehicle described in Japanese Utility Model Laid-Open No. 60-69855 in order to enable manual operation of the mechanical clutch 7, which will be described below.

This automatic transmission of a vehicle is a mechanical unit that includes a control unit that determines a gear shift according to an operating state of an engine, opens and closes a clutch based on the determination result, and shifts the transmission. In vehicles equipped with an automatic transmission with a clutch, the clutch pedal that manually operates the clutch, the clutch pedal switch that detects the operation of the clutch pedal, and the manual clutch operation by stopping the automatic clutch control of the control unit when the clutch pedal is depressed The correction means for giving priority to is provided.

Therefore, in the automatic transmission of this vehicle, when the clutch pedal is depressed, the clutch control is prioritized by manual operation when the clutch pedal is depressed and the clutch pedal is operated.

[0010]

[Problems to be solved by the device]

 However, the depression of the clutch pedal is not always performed only when the manual operation of the clutch is required, and the clutch pedal may be depressed by mistake or when the accelerator pedal is depressed. There is also a risk that some operations will be performed.

In such a case, suddenly the output of the engine is not transmitted to the transmission, and a dangerous state occurs when the engine brake is applied. In addition, if a manual operation of the clutch as described above is needed and a running state that is an alternative to manual operation is attempted to be handled by the program of the control unit, a huge amount of programming will be required, resulting in tuned man-hours and cost. There were also problems such as accidents.

The present invention requires the operation of the clutch near the sudden shock starting when the vehicle has entered a depression, mud, sand, etc., or requires a swing-back operation in such a case. When the clutch pedal is depressed when it is not necessary to switch to manual operation, the clutch operation is automatically switched to manual depending on the sudden connection of the clutch pedal or the engine rotation condition. The purpose is to prevent the danger of manual operation.

[0013]

[Means for Solving the Problems]

 The present invention relates to means for an automatic transmission of a vehicle for achieving the above-mentioned object, and determines a gear shift according to an engine operating condition, and based on the determination result, engages and disengages a mechanical clutch and shifts the gear. In a vehicle automatic transmission equipped with a control unit for changing gears, a clutch pedal for manually operating a clutch and an output according to the operation amount of the clutch pedal are input to the control unit. It is characterized by comprising a potentiometer and a clutch actuator which operates with the output of the control unit according to the input state of the potentiometer and connects and disconnects the mechanical clutch.

[0014]

[Action]

 In the vehicle automatic transmission of the present invention, when the clutch pedal is stepped on or released, the operation amount of the clutch pedal at that time is converted into an electric signal by the potentiometer and input to the control unit. The control unit determines whether or not it is necessary to manually switch the clutch operation as described above on the basis of the operation amount, time, or the engine rotation state.

When it is determined that the control unit should be switched to the manual mode, the control unit outputs to the clutch actuator according to the electrical output of the potentiometer, and the output causes the clutch actuator to operate. The clutch is operated manually.

[0016]

【Example】

 Next, an example of implementation of the present invention will be described below with reference to FIGS. FIG. 1 shows an entire automatic transmission of a vehicle based on the present invention, FIG. 2 is a block diagram thereof, 1 is an engine, 2 is an accelerator pedal, 3 is an accelerator sensor for detecting the depression amount of the accelerator pedal 3, Reference numeral 4 is a control unit, 5 is an injection pump, 6 is a rotation sensor for detecting the engine speed, 7 is a mechanical clutch, 8 is a transmission, 9 is a main shaft for rotating wheels, and 10 is a connection / disconnection of the mechanical clutch 7. A clutch sensor for detecting the state, 11 is a vehicle speed sensor, 12 is a shift lever, 13 is a transmission operating unit, and 14 is a clutch actuator.

In the automatic transmission of this vehicle, the clutch pedal 15 shown in FIGS. 4 to 6 is fixed to the rotatable shaft 16 by being pivotally supported by the pedal bracket 15a at the same place as that of an ordinary vehicle. One end of the cylinder 17 is installed on the rotary arm 19 of the shaft 16 for returning when the clutch pedal 15 is depressed.

A potentiometer 18 attached to a potentiometer bracket 18a is connected to a rotary arm 19 that rotates in accordance with the depression of the clutch pedal 15 of the shaft 16 to rotate the shaft 16 by a potentiometer. Expanded to 18 and transmitted.

The electrical output accompanying the rotation of the potentiometer 18 is shown in FIG. 7, and the output voltage of the potentiometer 18 when the rotation angle of the potentiometer 18 is taken on the horizontal axis is the vertical axis. It is represented by.

Therefore, when the clutch pedal 15 is set, it is within the 60 ° range that can be used as the output of the potentiometer, and this output is input to the control unit 4.

The control unit 4 connects the emergency switch 20 to the control unit 4 and operates it from the driver's seat, or the operation of the clutch pedal 15 and the mutual relation of the depression degree of the accelerator pedal 2 at this time. When the control unit 4 determines that the manual operation of the mechanical clutch 7 is requested, the control unit 4 sends the output for operating the clutch actuator 14 to the clutch actuator 14 in response to the output of the potentiometer 18. ..

FIG. 3 shows the entire clutch actuator portion including the clutch actuator 14 that operates according to this output. In the figure, reference numeral 25 denotes a solenoid valve that operates by the output from the control unit 4, and during operation, intake air from the air reservoir 24 flows in the direction of the solid line arrow, and exhaust air flows in the direction of the dotted line arrow. The piston 14a therein is moved to the left side in the drawing, the mechanical clutch 7 is operated, and the connection / disconnection is performed.

The movement of the piston 14 a is transmitted to the outer lever 22 by the rod 21, the movement causes the clutch stroke sensor 23 to move, and the movement amount thereof is converted into an electric signal and input to the control unit 4, The control unit 4 controls the solenoid valve 25 so that the amount of movement of the solenoid valve is commensurate with the output of the potentiometer 8.

As a result, the mechanical clutch 7 behaves as shown in FIG. 8. In FIG. 8, the horizontal axis represents time or accelerator opening angle and the vertical axis represents the stroke of the clutch pedal 15. Functions like a to e.

That is, a is required to move at once, b is duty control (slow), c is slip, half-clutch control, d is duty control (slow), and e is a solenoid valve OFF operation. “A” in the above corresponds to a clutch operation such as a sudden start of the vehicle, a depression such as rolling back, or an escape from the mud.

The operations a to e indicated by the diagonal lines in FIG. 8 can be performed by manually operating the mechanical clutch 7, and the controllable area of the mechanical clutch 7 by the driver's intention is It becomes larger like the shaded area, and the same operation as a vehicle with a manually controlled clutch is possible.

FIG. 9 is a diagram in which the vertical axis represents the clutch stroke when the movement of the clutch stroke sensor 23 for such operation is plotted on the horizontal axis. The emergency switch 20 may be omitted, and the mechanical clutch 7 may be manually operated by controlling only the control unit 4.

[0028]

[Effect of the device]

 As described above, the present invention allows the mechanical clutch to be engaged or disengaged in accordance with the operation of the clutch pedal when the vehicle enters a depression, a mud, etc. and attempts to suddenly start or swing back to escape from it. Even in a vehicle that does not require a shift clutch operation, a manual clutch operation is possible in the same way as a manual clutch vehicle, and it is possible to escape from a depression or a mud.

The changeover to the mechanical clutch is performed by determining that the control unit is going to perform the manual clutch operation, depending on the operation of the emergency switch or the stepping condition of the clutch pedal and the accelerator pedal at this time. Since it can be performed, the switching operation is extremely easy.

Further, when the clutch pedal is erroneously stepped on or the clutch pedal is erroneously operated, such as in a vehicle that is switched to manual operation only by stepping on the clutch pedal, the clutch operation becomes manual, which causes a danger. It has the effect of being able to prevent the occurrence of

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire embodiment of the present invention including a circuit connection state.

FIG. 2 is a block diagram of the above circuit.

FIG. 3 is a schematic view showing the operation of the clutch actuator portion of the above.

FIG. 4 is a side view of the clutch pedal portion of the above.

5 is a bottom view of FIG. 4. FIG.

6 is a sectional view taken along line XX of FIG.

FIG. 7 is an output voltage characteristic diagram of a potentiometer.

FIG. 8 is a diagram showing a manual operation range of a mechanical clutch.

FIG. 9 is a diagram showing a relationship between a clutch stroke sensor and a clutch stroke.

FIG. 10 is a perspective view showing the whole including a connection state of a circuit of a conventional automatic transmission of a vehicle.

[Explanation of symbols]

 1 Engine 4 Control Unit 8 Transmission 14 Clutch Actuator 15 Clutch Pedal 18 Potentiometer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ikuro Nozu, Iyo-chome, 1-chome, Ageo, Saitama Prefecture, Nissan Daisel Industry Co., Ltd. Within the corporation

Claims (1)

[Scope of utility model registration request] 1. An automatic transmission for a vehicle, comprising: a control unit for determining a gear shift according to an operating state of an engine, engaging and disengaging a mechanical clutch based on the determination result, and performing a shift change of the transmission. ,
A clutch pedal for manually operating the clutch, a potentiometer that outputs according to the operation amount of the clutch pedal, and the potentiometer that is input to the control unit, and the output of the control unit that operates according to the input state of the potentiometer An automatic transmission for a vehicle, comprising: a clutch actuator that connects and disconnects the mechanical clutch.