JP2955092B2 - Electronically controlled automatic transmission shift device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift device for an electrically controlled automatic transmission of a vehicle, for example, a vehicle with a multi-stage automatic transmission, a dump truck, a trailer tractor, a motor grader, an automobile and the like.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a conventional shift device for a vehicle transmission. This transmission has a multi-stage multi-plate clutch and gears. Then, the operator manually moves the shift lever to a speed position corresponding to the speed, switches the hydraulic valve via rods, wires, and the like, selects a shift speed, and performs work traveling.

FIG. 9 shows another example of a conventional shift device for a vehicle automatic transmission. In this shift device, the shift lever is moved in a one-way shift path to perform automatic shifting.

[0004]

The conventional vehicle shift device shown in FIG. 9 has the following problems. (1) In the conventional automatic transmission for a vehicle shown in FIG. 9, the shift lever moves only in one direction. In this shift lever, when automatically shifting a transmission having a large number of gears, for example, when automatically shifting to eight gears, when trying to enable all gears manually or automatically, P (parking), N (neutral) ), D (automatic transmission), 8, 7, 6, 5, 4, 3, 2,
It is necessary to provide as many positions as one, and there are problems such as taking up too much space in practical use. In addition, operation is difficult,
Operation errors are easy to occur. (2) Automatic transmission vehicles usually do not allow manual gear shifting at high speeds. During high-speed work in the D (automatic shifting) position, the engine speed is increased to provide driving force. Due to changes in running resistance and gradient, there is a disadvantage that the driving speed becomes insufficient due to unexpected shift-up when the running speed increases. Therefore, manual shifting is desirable even at a high speed. (3) In a vehicle having only manual shifting, when performing multiple gear shifting, for example, eight gear shifting, there are eight or more shift positions, causing a shift error or a troublesome shift.

The present invention has been made in view of the above-mentioned problems, and the object thereof is to facilitate driving. Also, it can be maintained at the optimum speed stage. It is still another object of the present invention to provide a shift device for an electrically controlled automatic transmission of a vehicle capable of improving the working efficiency of the working vehicle.

[0006]

To achieve the above object, according to the present invention, a shift lever is moved in a vertical shift path parallel to a vehicle traveling direction. An electronically controlled automatic transmission for a vehicle that automatically switches to a shift pattern specified by a position where a shift lever is stopped, wherein the automatic shift position has a horizontal shift path that crosses the vertical shift path substantially in a cross shape, and the automatic shift position is the vertical shift path. Shift road
In is arranged in the intersecting portion, the shift lever to move Then gear is conversion despite over to manual shifting of the transmission to the lateral shift path from said longitudinal shift path, of the lateral shift path
The gear is manually shifted by moving the shift lever only.

Further, according to the present invention, the shift lever is provided with a push button switch, and when the shift lever is in the automatic shifting position in the vertical shift path, the push button switch is pushed by the push button switch. The shift speed is switched to the manual shift mode while the running gear is fixed, and the shift mode is switched to the automatic shift mode by pressing the push button switch again.

According to the present invention, the shift lever is provided with a push button switch, and the shift lever is located at an automatic shift position in a vertical shift path, and the gear position during traveling is determined by the push button switch. When the gear is fixed, the gear is unlocked by moving the shift lever from the automatic shift position into the vertical shift path.

Further, according to the present invention, as described in claim 4, a manual shift to a high speed step is performed by the number of steps corresponding to the number of times the shift lever is moved from the automatic shift position in the vertical shift path to the horizontal shift path. Conversely, the shift lever is manually shifted to the lower gear by the number of steps corresponding to the number of times the shift lever is moved from the horizontal shift path to the automatic shift position in the vertical shift path.

Further, according to the present invention, a plurality of position detectors for detecting each shift position of the shift lever in the vertical shift path are connected to the automatic transmission via the electronic control unit. .

[0011]

The shift device of the electric control automatic transmission for a vehicle according to the present invention is constructed as described above. (1) Various gear states are selected by moving the shift lever in the vertical shift path, and the automatic shift is performed. In the position D, the gear is automatically shifted from the start to the highest gear position.
Driving is possible without operating the shift lever, safety is increased, and driving is facilitated. (2) When the push button switch provided on the shift lever is pressed during automatic shift traveling, the gear position during traveling is fixed, and when there is a load change during traveling on a slope or during work, etc., careless automatic shifting is prevented. The speed is maintained at the optimum speed. (3) If the gear is fixed in the automatic shift position D and the shift lever is moved laterally in the lateral shift path 14, the number of gears can be changed one by one at a time according to the intention of the operator. In other words, manual shifting is possible while being automatic shifting, and automatic shifting and manual shifting are switched in accordance with various driving situations and working situations, thereby improving the working efficiency of the working vehicle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a shift device for an electrically controlled automatic transmission of a vehicle according to the present invention will be described with reference to the embodiments shown in FIGS.
1 is a motor grader, FIGS. 1 and 2 are shift levers, 3 is a push button switch provided on the top of the shift lever 2, 8 in FIG. 3 is a gate plate, and 13 is a vehicle traveling on the gate plate 8. A vertical shift path 14 provided in parallel to the direction is a horizontal shift path which crosses the vertical shift path 13 in a substantially cross shape.

FIG. 3 shows a shift lever unit 16 in FIG.
5 is a vertical pivot shaft rotatably attached to the shift lever unit 16, and the lower end of the shift lever 2 is attached to the vertical pivot shaft 15. 3 to 5 are a pair of horizontal turning shafts attached to both outer surfaces of the shift lever unit 16, and the shift lever unit 16 is rotatably supported by the respective horizontal turning shafts 7.

Reference numeral 19a denotes a sensor plate with a protrusion attached to one end of the vertical turning shaft 15, 19b denotes a sensor plate with a protrusion attached to the outer end of the one horizontal turning shaft 7, and 4 denotes the sensor plate 19a. , A position switch group 5 disposed close to the sensor plate 19b, and a shift down sensor 6 disposed close to the sensor plate 19b.

Reference numeral 7 'denotes an arm attached to the outer end of the other horizontal pivot shaft 7, and reference numerals 9 and 9 denote springs interposed between the tip of the arm 7' and the shift device main body 22. The spring 9 keeps the shift lever 2 always at the neutral position in the lateral movement direction. Reference numeral 17 denotes a switching switch attached to the gate plate 8, and 10 denotes an electronic control unit. The switching switch 17, the position switch group 4, the shift-up sensor 5, and the shift-down sensor 6 are provided to the electronic control unit 10. Connected.

11 is a display monitor, 12 is an automatic transmission, 1
Reference numeral 8 denotes various sensors, and the display monitor 11, automatic transmission 12, and various sensors 18 are also connected to the electronic control unit 10. 7 denotes an electromagnetic control valve of the automatic transmission 12 and 21 denotes a transmission of the automatic transmission 12. FIG.
A control system from the shift device 22 to the transmission 21 is shown, and signals input to the electronic control device 10 are roughly classified as follows when described with reference to FIG. (1) Move to five positions (for example, P (parking), N (neutral), D (automatic shifting), L ₂ (low-speed operation), L ₁ (high-speed operation) located in the vertical shift path 13 A signal from a group of position switches 4 for detecting the position of the shifted shift lever 2. (2) A signal from the push button switch 3 for switching the gear position between fixed and automatic during traveling by D (automatic shift). (3) Signals from the shift-up sensor 5 and the shift-down 6 for detecting the lateral movement (shift-up or shift-down) of the shift lever 2 in the horizontal shift path 14. (4) A signal from the switching switch 17 for switching between forward and reverse. (5) Signals from various sensors (vehicle speed sensor, engine speed sensor, accelerator opening sensor, etc.) 18.

These signals are calculated in accordance with a definition preset in the electronic control unit 10, and the result is sent to an electromagnetic control valve 20 in the automatic transmission 12, which controls the transmission to change the speed of the transmission 21. Is done. The state of the automatic transmission 12 at that time is also sent to the display monitor 11, where it is displayed and notified to the operator.

Next, the operation of the shift device for the electrically controlled automatic transmission of the vehicle shown in FIGS. 1 to 7 will be described in detail. When the shift lever 2 is vertically moved along the vertical shift path 13, the movement is sensed by the group of position switches 4, and the electronic control unit 10 recognizes the position of the shift lever 2, and
Automatic shifting is performed as determined in each shifting position.

When the shift lever 2 is in the automatic shift position D, the automatic transmission 12 is operated as predetermined in accordance with the conditions (vehicle speed, engine speed, accelerator opening, etc.) from various sensors. , Automatic transmission is performed. When the shift lever 2 is in the parking position P, the gear of the automatic transmission 12 is released, and the parking brake of the vehicle operates. When the parking position P is set to R, reverse automatic transmission is performed.

When the shift lever 2 is in the neutral position N, the parking brake is released and the transmission becomes neutral. From this state, the shift lever 2 is moved to the automatic shift position D, and when the engine rises to a preset number of revolutions, the vehicle starts running and is set in advance according to conditions such as a vehicle speed, an engine revolution number, and an accelerator opening. Automatically shifting according to the definition.

When the push button switch 3 provided on the shift lever 2 is pressed during the traveling of the automatic shift position D, the gear position in that state is fixed. In this state, when the vehicle is moved laterally along the lateral shift path 14, the movement is sensed by the shift-up sensor 5 or the shift-down sensor 6, and when the shift lever 2 moves to the shift-up side, the number of times is increased. The automatic transmission 12 is controlled by the electronic control unit 10 by the corresponding number of gears, and the shift-up is performed.
Conversely, when the shift is performed to the downshift side, the automatic transmission 12 is controlled by the electronic control unit 10 by the number of gears corresponding to the number of shifts, and the downshift is performed. As a result, manual gear shifting is performed step by step.

The switching switch 17 is connected to the electronic control unit 10 and switches between forward and reverse. In this case, the present shift device operates in the same manner whether the vehicle is moving forward or backward, except that the traveling direction is changed. When the switching switch 17 is a parking brake and the parking position P is R,
The R position is a reverse automatic transmission, and the positions other than the neutral position N function only in the forward direction.

When the shift lever 2 is in the low-speed working position L ₂
, The gear is set to a preset gear, for example, a lower gear such as the second gear. When the shift lever 2 is in the high speed working Pojishiyon L _1, the gear position is set even lower, it will issue a driving force that is suitable for extremely low speed operation or engine brake.

[0024]

As described above, the shift device of the vehicle electric control automatic transmission according to the present invention has a longitudinal shift path 1 of the shift lever 2 as described above.
By the movement within 3, various gear states are selected,
In the automatic shifting position D, the automatic shifting is performed from the start to the highest gear position, so that the operator can travel without operating the shift lever 2 and can increase safety and can easily drive. .

When the push button switch 3 provided on the shift lever 1 is depressed during the automatic shifting operation, the gear position during the operation can be fixed. Shifts can be prevented and the optimal gear can be maintained. Further, when the gear position is fixed by the automatic shift position D, if the shift lever 2 is moved laterally into the lateral shift path 14, the number of gears can be changed one by one at a time by the worker's intention. In other words, manual shifting is also possible while automatic shifting, and can be switched between automatic shifting and manual shifting according to various driving situations and working situations, thereby improving the working efficiency of the working vehicle.

[Brief description of the drawings]

FIG. 1 is a side view of a motor grader to which a shift device for an electrically controlled automatic transmission of a vehicle according to the present invention is applied.

FIG. 2 is a perspective view showing an embodiment of the shift device.

FIG. 3 is a system diagram showing a relationship among the shift device, an electronic control unit, and an automatic transmission.

FIG. 4 is a vertical side view of the shift device.

FIG. 5 is a cross-sectional plan view of the shift device.

FIG. 6 is another longitudinal side view of the shift device.

FIG. 7 is an operation explanatory diagram showing a control flow of the shift device, the electronic control device, and the automatic transmission.

FIG. 8 is a perspective view showing an example of a conventional shift device for a vehicle transmission.

FIG. 9 is a perspective view showing another example of the shift device of the conventional vehicle automatic transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor grader 2 Shift lever 3 Push button switch 4 Position switch group 5 Shift up sensor 6 Shift down sensor 7 Horizontal turning shaft 8 Gate plate 9 Spring 10 Electronic control unit 11 Display monitor 12 Automatic transmission 13 Vertical shift path 14 Horizontal shift path DESCRIPTION OF SYMBOLS 15 Vertical turning axis 16 Shift lever unit 17 Switching switch 18 Various sensors 19 Sensor plate 20 Solenoid switching valve 21 Transmission 22 Shift device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-34214 (JP, A) JP-A-5-164237 (JP, A) Jpn. Field (Int.Cl. ⁶ , DB name) B60K 20/00-20/08 F16H 59/00-59/12

Claims (5)

(57) [Claims] 1. An electronically controlled automatic transmission for a vehicle in which a shift lever is moved in a vertical shift path parallel to the vehicle body traveling direction and automatically switches to a shift pattern specified by a position where the shift lever is stopped. A horizontal shift path that crosses the vertical shift path substantially in a cross shape, and wherein the automatic transmission position
Is disposed at the site, the gear stage of the mobile Then transmission of the shift lever from the vertical shift path in the horizontal shift path is conversion over to manual transmission
Movement of the shift lever only in the lateral shift path.
A shift device for an electrically controlled automatic transmission of a vehicle, wherein the shift device is configured to perform manual gear shifting. 2. A shift button is provided on the shift lever, and when the shift lever is in an automatic shift position in a vertical shift path, the shift lever is depressed to fix a gear in the running state to manually operate the shift lever. 2. A shift device for an electrically controlled automatic transmission according to claim 1, wherein the shift is switched to a shift, and the push button switch is pressed again to switch to an automatic shift. 3. The shift lever is provided with a push button switch, and when the shift lever is in an automatic shift position in a vertical shift path and the running gear is fixed by the push button switch, the shift lever is provided. The shift device for an electrically controlled automatic transmission for a vehicle according to claim 1, wherein the fixed gear position is released by moving the gear from the automatic shift position into the vertical shift path. 4. In contrast, the shift lever is manually shifted to a high speed step by the number of steps corresponding to the number of times the shift lever is moved from the automatic shift position in the vertical shift path to the horizontal shift path. 2. A shift device for an electrically controlled automatic transmission for a vehicle according to claim 1, wherein manual shifting to a low speed stage is performed by a number of stages corresponding to the number of times the vehicle is shifted from the inside to the automatic shift position in the vertical shift path. 5. The vehicle according to claim 1, wherein a plurality of position detectors for detecting each shift position of a shift lever in the vertical shift path are connected to an automatic transmission via an electronic control unit. Shifting device for electrically controlled automatic transmission.