JP3599081B2 - Gear stage display - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gear position display device for displaying a gear position of a transmission of a vehicle.
[0002]
[Prior art]
Automatic transmission For example, a mechanical automatic transmission is equipped with a manual transmission equipped with a gear shift unit for switching gears, a clutch actuator, etc., and the driver operates the accelerator pedal and the brake pedal to start and stop. Is configured to be able to perform the control. Such an automatic transmission is provided with a gear position display device for displaying the current gear position. The gear position display device includes a gear position display device that displays the current gear position (gear position) and a control unit that controls the gear position display device, and determines which position (gear position) the gear is in. Display with numbers. This allows the driver to drive the vehicle with peace of mind.
[0003]
An example of such a gear position display device is disclosed in Japanese Utility Model Laid-Open Publication No. 3-117160. In the shift position display device, when the control unit displays the neutral position within the predetermined time and the detection signal from the shift position detecting member is not input within the predetermined time, the display of the shift position before the shift is continued. Thus, the turning off of the display that occurs when the detection signal is not input is eliminated, and the anxiety to the driver is eliminated. FIG. 6 shows a time chart of the gear position display device. When the change lever is in the D range as shown in FIG. 6 (a) and the shift speed is shifted from the second speed to the third speed with the depression of the accelerator pedal, the speed changes from second speed to neutral (N) → third speed, A gear shift unit (GSU) position switch for detecting the gear position of the shift speed detects the second speed position → the neutral position (N) → the third speed position and outputs a signal, as shown in FIG. Since the mechanical automatic transmission is based on the manual transmission, the transmission always passes through the neutral position (N) when shifting, and when shifting from the second to the third gear, the second gear → N → the third gear (3rd gear). When shifting from the second speed to the second speed, the third speed → N → the second speed). Then, the gear position display device displays the current gear position 2 → N → 3 as shown in FIG.
[0004]
[Problems to be solved by the invention]
By the way, the above-mentioned gear position display device does not faithfully reproduce the signal of the gear shift unit position switch, but displays the current gear position excluding the neutral position with a delay of a predetermined time (1 second) (with a timer). Let me. For this reason, when shifting from the second speed to the third speed, the neutral display (N) is not performed and the 2 → 3 display is performed within the predetermined time (1 second). However, if it takes longer than the predetermined time (1 second) for the gear change, neutral (N), which is an intermediate gear, is displayed (FIG. 6 (c)).
[0005]
Further, since the gear shift unit position switch is configured to sense the neutral position (N) in the center area of the detection area and the gear position (SH) in the area where the gear is engaged, the current gear position is set where. You may not be able to confirm that there is. For example, if the gear is caught in the region between the neutral position and the target gear and the gear shift unit position switch does not enter any position, there is no signal. The difficulty in shifting from the second gear to the third gear via the neutral position N due to mechanical play is caused by one retry (if the gear cannot be shifted to the target gear when the gear is shifted, the gear is re-entered). Then, the predetermined time is exceeded. In such a case, there is no signal via the neutral position (N), and if the predetermined time (1 second) has elapsed since the previous gear (second speed), the delay timer expires and no display is made. (FIG. 6C).
[0006]
As described above, if the predetermined time (1 second) or more elapses until the signal of the target shift speed (next shift speed) is input during the automatic shift, a blank display or a neutral display may be displayed, causing anxiety of the driver. There is a fear.
Further, when a failure such as a disconnection of the gear shift unit position switch occurs, no signal is generated, and there may be no display even though the gear of the transmission is engaged. For this reason, the driver may judge that the gear is not engaged (misunderstanding).
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a gear position display device that eliminates a blank display and a neutral position display during gear shifting.
[0008]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, according to the first aspect, a shift operation command detection for detecting whether a state of a transmission of a vehicle is a running state or a neutral state by a shift operation device operated by a driver. Means, a shift state position detecting means for detecting a shift state position of the transmission, and a shift state of the transmission is performed when the shift operation command detecting means indicates a running state, and a neutral state when shifting. also There displays the previous shift speed prefrontal Symbol shift at the output until the next shift stage should have current position detected is changed in speed by the speed change state position detecting means when it is detected, the transmission is performed the shift position detecting means regardless is characterized in that it has a shift position display device that displays the next shift stage to be shift when it becomes no signal after outputting the neutral state.
[0009]
In 請 Motomeko 2, wherein the shift position display device, an output of the shifting state position detecting means is characterized in that a warning when it becomes no signal.
[0010]
A shift operation device operated by a driver detects whether the transmission of the vehicle is in a running state or a neutral state by detecting a shift operation command detecting means, and detecting a shift state position of the transmission by a shift state position detecting means. I do. The gear position display means is configured to perform gear shifting of the transmission when the gear shift operation command detecting means indicates a traveling state , and to change gear position state detecting means when a neutral state is detected during gear shifting. The previous shift stage before the shift is displayed until the signal of the shift stage (target shift stage) is output. The speed change is not limited to the travel range (D range) in the automatic transmission, and is the same in the case of manual operation in the manual transmission.
[0011]
The shift position display device displays a shift position determined by the shift operation unit when the shift state position detection unit outputs a neutral state and outputs no signal despite the shift of the transmission, and further, A warning is displayed when the output of the shift state position detecting means becomes no signal. The next gear to be shifted is the command of the operating lever itself in the case of manual operation. However, in the case of a traveling range (D range) of automatic shifting, the D-range command of the operating lever is received and the vehicle speed and the accelerator are received. The next shift speed is determined from the shift map based on the opening.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to examples.
FIG. 1 is a block diagram of a gear position display device of an automatic transmission to which the present invention is applied. As described above, this automatic transmission is equipped with a gear shift unit for switching gears, a clutch actuator, and the like to the manual transmission as described above, and the driver operates the accelerator pedal and the brake pedal to start and stop. Is configured to be able to perform the control.
[0013]
In FIG. 1, a shift position display device 1 includes a lever position sensor 2 as a shift operation command detecting unit that detects an operation position of a change lever (not shown), and a gear shift unit position as a shift state position detecting unit that detects a gear shift position of a shift stage. A control unit (ECU) 7 for instructing the gear position display unit 4 with a gear position (including a neutral position) to be displayed based on output signals from the switch 3, the lever position sensor 2, and the gear shift unit position switch 3. The gear position display unit 4 for displaying the gear position in response to an instruction and an alarm lamp 6 are displayed. The gear position display means 5 includes a control unit 7, the gear position display unit 4, and an alarm lamp 6.
[0014]
The change lever is operable by the driver, and a neutral position (N) range, a reverse (R) range, and a D range corresponding to an automatic shift mode are set. An M (manual) range corresponding to the manual shift mode is also set. The change lever includes a lever position sensor 2 that detects an operation position of the change lever, and detects a mode currently selected by the driver from the position of the change lever. The gear shift unit position switch 3 is mounted on the transmission, detects each shift speed, and outputs a shift speed signal (gear position signal).
[0015]
The control unit 7 includes a central processing unit (CPU), a memory, and an interface as an input / output signal processing circuit. The memory includes a read-only memory (ROM) in which various control programs and data are written, a writable memory. Memory (RAM).
On the input side of the control unit 7, in addition to signals from the lever position sensor 2 and the gear shift unit position switch 3, signals from various sensors such as a vehicle speed sensor, an accelerator opening sensor, and an engine rotation sensor are also input. In addition to a gear position display unit 4 and an alarm lamp 6 arranged on an instrument panel (not shown) provided in the driver's cab, a gear shift unit control device, a clutch control device, and the like for adjusting a gear to a target gear position ( (Not shown).
[0016]
When the select position is set to the D range, the control unit 7 stores a shift map for determining a target shift speed based on signals such as a vehicle speed, an accelerator opening, and an engine speed in the memory (ROM). Have been. Accordingly, the control unit 7 applies a shift signal corresponding to the target shift speed to the gear shift unit to adjust the gear to the target shift speed. As a result, automatic shift control is performed.
[0017]
When the gear of the transmission is switched to the target shift speed and the shift is completed, the gear shift unit position switch 3 outputs a shift speed signal (gear position signal). The control unit 7 determines whether or not each gear has been switched in response to the shift signal, that is, whether the meshing is in a normal state, based on the shift speed signal.
[0018]
The control unit 7 receives signals from the lever position sensor 2 and the gear shift unit position switch 3 to determine the current gear position, and outputs a gear position display command signal to the gear position display unit 4. The gear position display section 4 displays the current gear position (current gear position) based on the command signal. The control unit 7 displays the current gear stage until a signal from the gear shift unit position switch 3 of the target gear stage is input during gear shifting.
[0019]
When the signal of the target gear position is not input due to disconnection of the gear shift unit position switch 3 or the like, when the neutral position (N) signal is confirmed at the time of gear shifting, the target gear position is displayed, and when not confirmed. Indicates the current gear position. The gear position display section 4 displays the gear positions by numbers, and displays the second speed, third speed, fourth speed, and the like as 2, 3, and 4. Further, the neutral position is indicated by a symbol N.
[0020]
The operation will be described below.
First, a description will be given of a case where the current gear position is displayed until the gear shift unit position switch 3 of the target gear position is input during a gear shift, with reference to the time chart of FIG.
In FIG. 2, when the select position is set to the D range by the signal from the lever position sensor 2 ((a) in FIG. 2), when the shift speed is changed from the second speed to the third speed, From the gear shift unit position switch 3, as shown in FIG. 4B, a second speed position → a neutral position N → a third speed position signal is sequentially input. At this time, even if the residence time at the neutral position N exceeds a predetermined time (for example, 1 second) or more, the control unit 7 continues to operate until the current gear position, that is, the third speed position signal is input. The second speed is displayed on the gear position display section 4. In other words, the control unit 7 displays the current gear position on the shift position display section 4 even if it takes many seconds to stay at the neutral position during the shift.
[0021]
When the control unit 7 shifts from the third speed to the neutral position (N) when shifting from the third speed to the second speed as shown in FIG. 7B, the control unit 7 shifts from the gear shift unit position switch 3 for some reason. When the gear signal is not input, that is, when there is no signal, the third gear, which is the current gear, is displayed, the gear is shifted to the target gear (second gear), and the gear shift unit position switch 3 shifts to the second gear. When a signal is input, the second speed, which is the gear, is displayed.
[0022]
Next, a description will be given of a display in a case where a signal of the target shift speed is not input due to a failure such as a disconnection of the gear shift unit position switch 3.
As shown in the time chart of FIG. 3, the control unit 7 changes the gear position from the second speed to the third speed in the state where the select position is set to the D range by the signal from the lever position sensor 2 (FIG. 3A). When the gear is shifted, a signal of the target gear (third speed) is not input, that is, when there is no signal, a neutral position (N) signal is input when shifting from the second speed to the third speed (neutral When the position is confirmed) (FIG. 6 (b)), it is determined whether or not the gear shift unit position switch 3 has failed (disconnection). If it is determined that the gear shift unit position switch 3 has been disconnected, the target shift speed (3 Speed) is displayed on the gear position display section 4 (FIG. 3 (c)). At the same time, the control unit 7 lights the alarm lamp 6 to notify the driver of the abnormality.
[0023]
The determination as to whether the gear shift unit position switch 3 is out of order (disconnection) is made several times, for example, three times, when there is no signal after a lapse of a specified time when shifting from the second speed to the third speed. If the signal cannot be obtained from the gear shift unit position switch 3, the gear shift unit position switch 3 is out of order. Signal state). Then, the control unit 7 stores the flow of the shift position when an error (no signal state) occurs, and shifts to the target gear (the next third gear) when the neutral position signal is confirmed. It is displayed on the column display section 4.
[0024]
Further, as shown in the time chart of FIG. 4, the control unit 7 changes the gear position from the second gear to the third gear in the state where the select position is set to the D range by the signal from the lever position sensor 2 (FIG. 4A). When the gear is shifted to the high speed, the signal of the target gear (third speed) is not input, that is, when there is no signal, the neutral position (N) signal is not input when shifting from the second speed to the third speed. At this time (when the neutral position is not confirmed) ((b) in the figure), it is determined that the gear has not been disengaged when shifting from the second speed to the neutral position N, and the current gear position (second speed) Is displayed on the gear position display section 4.
[0025]
That is, the control unit 7 determines whether or not the gear shift unit position switch 3 is faulty (disconnection) as described above, and if it is determined to be faulty, the previous gear (second speed) after the determination is changed to the shift speed. It is displayed on the display unit 4. Thus, even if it is unclear whether the gear is shifted from the second gear to the third gear, the current gear (second gear) is displayed, so that the driver's anxiety can be eliminated. At the same time, the control unit 7 lights the alarm lamp 6 to notify the driver of the abnormality.
[0026]
Next, a control procedure of the gear position display device 1 shown in FIG. 1 will be described with reference to a flowchart of FIG.
As shown in FIG. 5, the control unit 7 determines whether or not the change lever is at the neutral position (step S1). When the change lever is not at the neutral position, whether or not the gear shift unit position switch 3 is at the neutral position is determined. Is determined (step S2). When the gear is not in the neutral position, it is determined whether or not a gear position signal (gear position signal) is input from the gear shift unit position switch 3 (step S3), and the gear position signal is input. At this time, the current gear position is displayed on the shift position display section 4 (step S9). When the change lever is at the neutral position in step S1, the control unit 7 determines whether the gear shift unit position switch 3 is at the neutral position (step S7). When the change lever is at the neutral position, the shift position display unit 4 displays the neutral position. (N) is displayed. If the control unit 7 determines in step S7 that the gear shift unit position switch 3 is not at the neutral position, the process proceeds to step S3.
[0027]
When the control unit 7 determines in step S3 that the gear position signal has not been input from the gear shift unit position switch 3, it determines whether an error (no signal state) has occurred (step S4), and the error occurs. Then, the alarm lamp 6 is turned on (step S5) to notify the driver of the abnormality, and it is determined whether or not the neutral position signal has been confirmed at the time of shifting (step S6). The target gear is displayed on the gear display 4 (step S10). The display of the target shift speed indicates a shift speed (gear position) other than the neutral position (N).
[0028]
When the control unit 7 determines that the gear shift unit position switch 3 is at the neutral position in step S2, the control unit 7 displays the previous gear on the speed display unit 4 (step S11). If it is determined in step S4 that no error has occurred, or if the neutral position signal has not been confirmed at the time of shifting in step S6, the control unit 7 sets the target due to a failure of the gear shift unit position switch 3 or the like. It is determined that the gear position signal has not been input, and the previous gear position is displayed on the gear position display section 4 (step S11).
[0029]
In the above embodiment, the gear position display section 4 and the alarm lamp 6 are separately provided. However, the function of the alarm lamp 6 is changed by blinking the display of the gear position (gear shift position). The part 4 may be used also. Further, the description has been given of the case where the present invention is applied to a mechanical automatic transmission. However, the present invention is not limited to this, and is applied to a manual transmission, in particular, a manual transmission which detects a change lever position and drives a transmission by a gear shift unit. Of course, it is also good.
[0030]
【The invention's effect】
According to the present invention as described above, it takes time to shift also possible to display the previous gear position, gear position display gear display means, non-display, only the neutral position display (D range ), The driver's anxiety can be eliminated.
When there is no output to the display device side despite containing the gear in the transmission side due to a failure such as a speed change state position detecting means, by displaying the next shift stage is supposed to be the transmission, the operation It is possible to prevent anxiety and misjudgment of the person.
[0031]
Furthermore, according to the second aspect of the present invention, even when the shift state position detecting means is in a no-signal state due to a failure such as a stuck gear or a disconnection, the driver can feel uneasy by displaying any one of the shift speeds. In addition, by displaying a warning, it is possible to urge the driver to perform inspection and repair.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a gear position display device according to the present invention.
FIG. 2 is a time chart for explaining an operation and a display state until a signal of a target shift speed is input during a shift of the shift speed display device of FIG. 1;
FIG. 3 is a time chart for explaining an operation and a display state when a signal of a target gear position is not input and a middle position signal is confirmed at the time of gear shifting of the gear position display device of FIG. 1;
FIG. 4 is a time chart for explaining an operation and a display state when a signal of a target gear position is not input and a neutral position signal is not confirmed at the time of gear shifting of the gear position display device of FIG. 1;
FIG. 5 is a flowchart illustrating an operation and a display state of the gear position display device of FIG. 1 during gear shifting.
FIG. 6 is a time chart for explaining an operation and a display state of a conventional gear position display device during gear shifting.
[Explanation of symbols]
DESCRIPTION OF REFERENCE NUMERALS 1 shift stage display device 2 lever position sensor 3 gear shift unit position switch 4 shift stage display section 5 shift stage display means 6 alarm lamp 7 control unit (ECU)

Claims (2)

A shift operation command detecting means for detecting whether the state of the transmission of the vehicle is a running state or a neutral state by a shift operating device operated by a driver;
Shifting state position detecting means for detecting a shifting state position of the transmission;
The speed change of the transmission is performed when the speed change operation command detecting means indicates a traveling state, and the current position detected by the speed change state position detecting means is shifted when a neutral state is detected during the speed change. displays the previous SL before shifting the pre-shift stages Rubeki following gear stage at the output until the time when the shift is the shift position detecting means despite were made that no signal after outputting the neutral state shift position display device characterized by having a that displays the next shift stage to be gear shift position display device. The shift position display device, shift position display device according to claim 1, wherein the output of said shifting state position detecting means displays a warning when a no signal.

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