JPH053381Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for adjusting the depression force of an accelerator pedal of a vehicle. More specifically, the present invention relates to an accelerator pedal depression force adjustment device for a vehicle equipped with an electronically controlled automatic transmission.

[Prior Art] Conventionally, an accelerator pedal depression force adjustment device for a large bus or the like equipped with an electronically controlled automatic transmission has a link mechanism connected to the accelerator pedal, and a link mechanism connected to this link mechanism to adjust the pedal force when the accelerator pedal is depressed. a return spring that returns to the previous position;
The accelerator sensor is used for electronic control of the automatic transmission and electrically detects the pedal stroke of the accelerator pedal.

[Problems to be solved by the invention] The conventional accelerator pedal pedal force adjustment device described above has the following problems:
The accelerator sensor is configured to operate relatively sensitively to depression of the accelerator pedal so as not to deteriorate the response sensitivity of the accelerator sensor. When examining changes in the pedal force with respect to the pedal stroke of this pedal force adjustment device, as shown in FIG. 4, the difference in the pedal force between pressing and returning the accelerator pedal, that is, the hysteresis width h, is characterized by being narrow. FIG. 5 is a characteristic diagram of an accelerator pedal depression force adjustment device for a vehicle that manually shifts the gears of a transmission.

For this reason, the accelerator pedal of a vehicle equipped with an electronically controlled automatic transmission has the problem that the pedal feels significantly different when operated compared to the accelerator pedal of a vehicle that manually shifts the gears of the transmission. Ta.

The purpose of this invention is to widen the difference between the pressing force on the accelerator pedal and when it returns, thereby improving the operating feel of the accelerator pedal in vehicles equipped with electronically controlled automatic transmissions. An object of the present invention is to provide an accelerator pedal depression force adjustment device that approximates the operating feeling of an accelerator pedal.

[Means for Solving the Problems] In order to achieve the above object, the configuration of the present invention will be explained based on FIG. 1, which corresponds to an embodiment.

The present invention provides an accelerator pedal 1 for a vehicle equipped with an electronically controlled automatic transmission, and an accelerator pedal 1 for a vehicle equipped with an electronically controlled automatic transmission.
a link mechanism 33 connected to the link mechanism 3;
A return spring 47 that is connected to the accelerator pedal 3 and returns the depressed accelerator pedal 1 to the position before it was depressed.
This is an improvement of an accelerator pedal depression force adjustment device that includes: and an accelerator sensor 5 that is used for electronic control of an automatic transmission and that electrically detects the pedal stroke of the accelerator pedal 1.

Its characteristic structure is that the link mechanism 33 and the return spring 47 are connected by a wire cable 45 bent into a U-shape with a predetermined radius of curvature R, and the accelerator pedal 1 that is depressed is attached by the return spring 47. The wire cable 45 is pushed back against the sliding resistance of the wire cable 45 and returned to its original state.

[Function] By interposing the wire cable 45 between the link mechanism 33 and the return spring 47,
As shown in FIG. 2, the difference between the depression force of the accelerator pedal 1 and its return becomes wider, that is, the hysteresis width h becomes wider.

[Example] Next, an example of the present invention will be described in detail based on the drawings.

As shown in FIG. 3, the accelerator pedal 1 of this embodiment is used to control an electronically controlled automatic transmission. This electronically controlled automatic transmission device includes a controller 2 and an electronic governor controller 3, each of which is a microcomputer. The detection outputs of an accelerator sensor 5 , a select lever sensor 6 , a vehicle speed sensor 7 , a transmission gear sensor 8 , and a rotation sensor 9 are connected to the controller 2 . The accelerator sensor 5 detects the pedal stroke of the accelerator pedal 1, and the select lever sensor 6 detects the shift operation position of the select lever 11 for performing the shift operation of the transmission 10. The transmission gear sensor 8 detects the gear position of the transmission 10. Rotation sensor 9 detects engine rotation speed. Further, the detection outputs of the accelerator pedal sensor 5, rotation sensor 9, engine water temperature sensor 13, and rack position sensor 14 are connected to the electronic governor controller 3. A control output of the electronic governor controller 3 is connected to an electronic governor 16 provided on the injection pump 15.

The transmission 10 is provided with an air cylinder 18 for shifting and selecting transmission gears, and a clutch 19
An air cylinder 20 is provided for connecting and disconnecting the clutch. Air cylinders 18 and 20 are connected to air tank 23 via air pipes 21 and 22, respectively. 24 is an air compressor. Air piping 21 and 22 are provided with solenoid valves 25 and 26, respectively.
are interposed, and the control output of the controller 2 described above is connected to these solenoid valves 25 and 26.
Further, the control output of the controller 2 is connected to an indicator 27 that displays gear position and the like.

Controller 2 and electronic governor controller 3
The system has a built-in memory that stores the optimum gear position, fuel injection amount, etc. to achieve economical and smooth driving of the vehicle.

The characteristic configuration of this embodiment is that the accelerator pedal 1
and the mounting structure of the accelerator sensor 5.

As shown in FIG. 1, an arm 29 pivotally attached to the base end of the accelerator pedal 1 passes through a through hole 31 in a floor plate 30 and is coupled to a ball joint 32. 33 is a link mechanism. The link mechanism 33 is connected to the shaft 34
Levers 35 to 37 fixed to this shaft 34
and rods 38-40 pivotally connected to these levers 35-37, respectively. A rod 38 of a link mechanism 33 is coupled to the ball joint 32. An accelerator sensor 5 is connected to the rod 39 via a lever 41. The accelerator sensor 5 is a vertical plate 42 fixed to the flange 30a of the floor plate 30.
mounted on.

The rod 40 is a guide 43 fixed to a vertical plate 42.
The wire cable 45 is slidably held on the wire cable 45 and connected to one end of a wire cable 45 via a connector 44 . The wire cable 45 includes outer boots 45a at both ends,
The predetermined radius of curvature R in this example is R=200 mm, which means that it is bent in a U-shape, that is, 180 degrees. wire cable 45
The other end is connected to one end of a return spring 47 via a connector 46, and the return spring 47
The other end is engaged with a stopper 48 fixed to the vertical plate 42. As the return spring 47, a spring having a large spring constant is selected so as to overcome the sliding resistance of the wire cable 45.

In the accelerator pedal depression force adjusting device configured as described above, when the pedal 1 is depressed, the rod 38 rotates the shaft 34, and the lever 36 and the rod 39
to quickly give a pedal stroke to the accelerator sensor 5. At the same time, the rod 40 pulls on the wire cable 45, causing the return spring 47 to expand. Since the spring constant of the return spring 47 is large, the pedal force on the pedal 1 increases as the pedal stroke increases compared to the conventional case.

Further, when stopping the pedal 1 and returning the pedal 1, the pedal stroke tends to return quickly because the spring constant of the return spring 47 is large, but the wire cable 45 bent at a predetermined radius of curvature R Slow down due to sliding resistance.

As a result, as shown by the solid line in FIG. 2, the difference in the pressing force between pressing and returning the accelerator pedal 1 increases,
That is, the hysteresis width h becomes wider.

The solid line in FIG. 2 shows the characteristics of this embodiment, and the broken line shows the characteristics of the conventional example, which is the same as in FIG.

[Effects of the invention] As described above, according to the invention, sliding resistance is imparted by the wire cable, and a return spring with a large spring constant is selected to overcome this resistance, thereby reducing the hysteresis of the accelerator pedal depression force. The width h is increased, and the operating feeling can be approximated to that of an accelerator pedal in a vehicle that manually shifts the gears of a transmission.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of essential parts of an accelerator pedal depression force adjusting device according to an embodiment of the present invention. FIG. 2 is a characteristic diagram showing changes in pedal force with respect to the pedal stroke.
FIG. 3 is a configuration diagram of an electronically controlled automatic transmission including an accelerator pedal of this embodiment. FIGS. 4 and 5 are characteristic diagrams showing changes in pedal force with respect to conventional pedal strokes. 1...Accelerator pedal, 5...Accelerator sensor, 10...Transmission, 33...Link mechanism, 45
...Wire cable, 47...Return spring.

Claims (1)

[Claims for Utility Model Registration] An accelerator pedal 1 of a vehicle equipped with an electronically controlled automatic transmission, a link mechanism 33 connected to the accelerator pedal 1, and the accelerator pedal 1 connected to the link mechanism 33 and depressed. An accelerator pedal depression force adjustment device comprising a return spring 47 for returning to the position before depression, and an accelerator sensor 5 used for electronic control of the automatic transmission and electrically detecting the pedal stroke of the accelerator pedal 1, The link mechanism 33 and the return spring 47 are connected by a wire cable 45 bent into a U-shape with a predetermined radius of curvature R, and the accelerator pedal 1 that is depressed is biased by the return spring 47. An accelerator pedal depression force adjusting device characterized in that it is configured to return to its original state while resisting the sliding resistance of the wire cable 45.