JPH08121588A - Oil temperature warning device of automatic vehicle - Google Patents

Abstract

PURPOSE: To reduce the number of parts and manufacturing cost by eliminating an oil temperature warning lamp. CONSTITUTION: Oil temperature warning is done by flashing an N range lamp 17 by way of doubly using the N range lamp 17 of a shift indicator to indicate a shift range position and controlling a switching cycle of a switching transistor 26 by an N range lamp signal output circuit 24 against an oil temperature warning signal output from a CPU 23. Additionally, the N range lamp 17 is also doubly used for failure warning indication, and the N range lamp signal output circuit 24 flashes the N range lamp 17 at the time of failure warning and oil temperature warning by way of changing the cycle and carries out failure indication preferentially.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil temperature warning device for an automatic vehicle, which flashes or lights a predetermined range indicator lamp of a shift indicator to give an oil temperature warning.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, an oil temperature warning device of this type has an automatic transmission computer (hereinafter referred to as "A / T computer").
The CPU 11 of 10 picks up a signal from a sensor (not shown), detects the oil temperature from the signal, and outputs an oil temperature warning signal to the oil temperature warning lamp signal output circuit 12 according to the detection result. The oil temperature warning light signal output circuit 12 turns on the switching transistor 13 in response to the oil temperature warning signal and outputs a signal for driving the oil temperature warning lamp 14 arranged in the meter panel to output the oil temperature warning signal. The warning light 14 was turned on.

[0003]

However, in the above device, the oil temperature warning lamp is provided in the meter panel and the oil temperature warning is issued independently, so that there is a problem that the number of parts and the cost increase. It was The present invention has been made in view of the above problems, and an object of the present invention is to provide an oil temperature warning device for an automatic vehicle that can eliminate the oil temperature warning lamp and reduce the number of parts and the manufacturing cost.

[0004]

In order to achieve the above object, the present invention has a range indicator lamp, a shift indicator for displaying the current shift range position on the range indicator lamp, and an oil temperature detecting means for detecting the oil temperature. In an automatic vehicle equipped with an oil temperature detection means including a CPU that outputs an oil temperature warning signal according to a detection result, when an oil temperature warning signal is output from the CPU, a predetermined range indicator lamp of the shift indicator (for example, There is provided an oil temperature warning device for an automatic vehicle, which is provided with a blinking means including a signal output circuit for blinking an N range lamp).

According to a second aspect of the present invention, there is provided a failure detection means including a CPU for detecting a failure, and when a failure warning signal indicating a failure warning is output from the CPU, the signal output circuit outputs the oil temperature warning signal. The predetermined range indicator lamp blinks at a speed different from the corresponding flashing speed. In the third aspect, the signal output circuit causes the predetermined range indicator lamp to blink by giving priority to the failure warning signal with respect to the oil temperature warning signal and the failure warning signal from the CPU.

According to a fourth aspect of the present invention, the shift indicator is arranged in the meter panel in the vehicle and / or next to the shift lever for selecting the shift range position. In claim 5, the C
When the oil temperature warning signal is output from the PU, a lighting means including a signal output circuit for lighting the predetermined range indicator lamp of the shift indicator is provided.

[0007]

The predetermined range display lamp of the shift indicator for displaying the shift range position is shared, and the predetermined range display lamp is blinked in response to the oil temperature warning signal output from the CPU to give an oil temperature warning. In the second aspect, the predetermined range indicator lamp is also used as a display for notifying a failure warning, and the predetermined range indicator lamp is blinked at the failure warning and the oil temperature warning at different cycles.

According to the third aspect, when the oil temperature warning signal and the failure warning signal are simultaneously generated, the failure warning is given priority and the predetermined range indicator lamp is blinked. According to the present invention, the shift indicator is arranged in the meter panel and / or next to the shift lever so that the oil temperature warning can be recognized even during operation. According to the fifth aspect, the oil temperature warning is issued by turning on the predetermined range indicator lamp in response to the oil temperature warning signal output from the CPU.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an oil temperature warning device for an automatic vehicle according to the present invention will be described with reference to the drawings of FIGS.
FIG. 1 is a schematic view of the combination panel 3. In the figure, a shift indicator 1 is arranged together with a speedometer 4 and a tachometer 5 in a combination panel 3 attached to an instrument panel (not shown) in front of a driver's seat. Shift indicator 1
Is P (parking), R (reverse), N (neutral), D (drive), S (second), L (low)
Range lamp 15 for panel showing each shift range position
.About.20, the current shift range position selected by the shift lever 2 described later is lit and displayed by the corresponding panel range lamp.

FIG. 2 is a schematic view of the shift lever device. In the figure, the lever side shift indicator 1'is
It is arranged beside the shift lever 2. Like the shift indicator 1, the lever-side shift indicator 1'has range lamps 35 to 40 indicating the respective shift range positions, and the current shift range position selected by the shift lever 2 is lit and displayed by the corresponding range lamp. .

The range lamp lighting circuit is constructed as shown in FIG. 3. For example, N range lamps 17 and 3 are provided.
When the shift lever 2 is set to the neutral position, the inhibitor switch 21 is turned on and a voltage is applied from the battery to light the switch lever 7, and when the shift lever 2 is switched to another range position, the inhibitor switch 21 is turned on.
Is turned off, the connection with the battery is cut off, and the light is turned off.

Here, in the embodiment, the range lamps 15 to 20 arranged on the shift indicator 1 in the panel 3 are arranged.
Among these, the oil temperature warning is given using the N range lamp 17 indicating the N range. According to this configuration, normally, the light is turned on according to the position of the shift lever 2 together with the N range lamp 37 provided on the lever-side shift indicator 1'as described above. Only can be blinked.

The range lamp in the panel 3 is used so that the driver can recognize it even while driving, and the N range lamp 17 is used basically during driving. This is because the N or P range is not selected and is in the off state, and in other range lamps, the lamp is repeatedly turned on and off due to frequent switching of the shift lever, which is not suitable for a warning. .

When fail detection of various electronic control systems is performed by the diagnosis function using a detector such as a multi-use tester, the range position is set to P.
The range is set and the P range lamps 15 and 35 are turned on to check the fail state. Even in such a situation, since it is unlikely that the shift lever is set to the N range position, it can be said that the N range lamp 17 is suitable for the oil temperature warning.

In FIG. 3, the CPU 23 of the A / T computer 22 takes in a detection signal indicating an oil temperature detected by a sensor or the like and a detection signal indicating a failure, and extracts the oil temperature from the oil temperature detection signal or the failure detection signal. Alternatively, a failure is detected, and an oil temperature warning signal or a failure warning signal is output to the N range lamp signal output circuit 24 according to the detection result. Further, the CPU 23 is connected to the N range ramp signal input circuit 25, and the N range ramp signal input circuit 2
The state of the N range lamp 17 is detected according to the output signal from the No. 5.

The N range lamp signal output circuit 24 outputs a signal for driving the N range lamp 17 by turning on / off the switching transistor 26 in response to the oil temperature warning signal or the fail warning signal, and outputs the N range lamp. 1
7 is flashing at different intervals. That is, the N range lamp signal output circuit 24 is responsive to the oil temperature warning signal or the fail warning signal to switch the switching transistor 26.
The switching cycle (ON / OFF cycle) is controlled to be changed. For example, when the oil temperature warning is issued, the switching transistor 26 is controlled so that the N range lamp 17 blinks quickly (the frequency is about 2.0 Hz). N range lamp 17 blinks slowly (frequency is about 1.0H
The switching transistor 26 is controlled so that Z). When both the oil temperature warning signal and the fail warning signal are output, the N range lamp signal output circuit 24 gives priority to the fail warning signal and performs control for fail display.

The N range lamp signal input circuit 25 includes an inhibitor switch 21 and a switching transistor 26.
It is connected to the CPU 23 to detect whether the inhibitor switch 21 is in the ON state and which switching cycle the switching transistor 26 is in, and outputs a state signal corresponding to the detection result to the CPU 23.

Next, the oil temperature warning device shown in FIG.
The blinking operation of the range lamp will be described based on the flowchart of FIG. In the figure, an A / T computer 22
The CPU 23 detects the oil temperature or the failure from the taken-in detection signal and outputs the oil temperature warning signal or the failure warning signal to the N range lamp signal output circuit 24 according to the detection result. The N range lamp signal output circuit 24 determines whether the input signal indicates a fail warning (step 101).

Here, when the above signal indicates a fail warning, a fail signal is output to the switching transistor 26 (step 102), and the switching cycle is controlled so that the switching transistor 26 slowly blinks the N range lamp 17. To control. If the signal does not indicate a fail warning, it is determined whether the input signal indicates an oil temperature warning (step 103).

If the signal indicates an oil temperature warning, the oil temperature signal is output to the switching transistor 26 (step 104), and the switching transistor 26 is turned on.
Controls the switching cycle so that the N range lamp 17 blinks quickly. If the above signal does not indicate an oil temperature warning, the process returns to step 101 and waits for the input of the next warning signal.

Therefore, in this embodiment, since the oil temperature warning is shared by using the N range lamp of the shift indicator equipped in the automatic vehicle, it is not necessary to install a dedicated oil temperature warning lamp. Further, in the present embodiment, when the fail warning and the oil temperature warning are detected, the N range lamp is blinked in different cycles according to these warnings,
Since the N range lamp is made to blink by giving priority to the fail warning, the fail warning and the oil temperature warning can be accurately given.

In the present embodiment, the oil temperature warning is issued by blinking the N range lamp, but the present invention is not limited to this.
It is also possible to turn on the N range lamp in response to the input of the oil temperature warning signal, and in this case as well, the dedicated oil temperature warning lamp can be eliminated. Further, in the present embodiment, the oil temperature warning is issued using the N range lamp, but the present invention is not limited to this, and it is also possible to issue the oil temperature warning using other range lamps.

Further, in the above-described embodiment, the panel range lamp provided in the combination panel 3 is made to blink to give a warning, but the N range lamp 37 on the shift lever 2 side is also made to blink. Is also good. According to this configuration, the warning display can be checked by either the N range lamp 17 in the panel 3 or the N range lamp 37 on the shift lever 2 side, so there is no fear of overlooking.

Further, when the blinking is performed only at the time of fail diagnosis by using the multi-use tester, the driver does not need to check the failure or warning in the meter panel because the driver is not driving and the panel range lamp blinks. You don't have to. Therefore, for example, only the N range lamp 37 of the shift indicator 1 ′ on the shift lever 2 side shown in FIG. 2 may be blinked.

[0025]

As described above, according to the present invention, a range indicator lamp is provided, and a shift indicator for displaying the current shift range position by the range indicator lamp, and an oil temperature are detected to detect the oil temperature. In an automatic vehicle equipped with an oil temperature detection means for outputting an oil temperature warning signal, a blinking means for blinking a predetermined range indicator lamp of the shift indicator when the oil temperature warning signal is output from the oil temperature detection means Therefore, the oil temperature warning light can be eliminated and the number of parts and the manufacturing cost can be reduced.

According to a second aspect of the present invention, there is provided a failure detection means for detecting a failure, and when the failure detection means outputs a failure warning signal indicating a failure warning, the blinking means blinks in response to the oil temperature warning signal. Since the predetermined range indicator lamp blinks at a speed different from the speed, the failure warning and the oil temperature warning can be displayed separately. In claim 3, the blinking means gives priority to the failure warning signal with respect to the oil temperature warning signal and the failure warning signal from the oil temperature detecting means and the failure detecting means, and causes the predetermined range indicator lamp to flash. Therefore, a highly important failure warning in an automobile can be detected with the highest priority.

According to the present invention, the shift indicator is arranged in the meter panel and / or next to the shift lever, and the predetermined range indicator lamp blinks in response to the oil temperature warning, so that the oil temperature warning can be recognized even during operation. it can. According to the present invention, since the oil temperature warning signal is output from the oil temperature detection means, a lighting means is provided for turning on the predetermined range indicator lamp of the shift indicator. The number of parts and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view of a combination panel.

FIG. 2 is a schematic view of a shift lever device.

FIG. 3 is a circuit diagram showing an example of the configuration of an oil temperature warning device according to the present invention.

4 is a flow chart for explaining a blinking operation of an N range lamp by the oil temperature warning device shown in FIG.

FIG. 5 is a circuit diagram showing a configuration of a conventional oil temperature warning device.

[Explanation of symbols]

 1 shift indicator 2 shift lever 3 combination panel 10,22 A / T computer 11,23 CPU 12 oil temperature warning light signal output circuit 13,26 switching transistor 14 oil temperature warning light 17,37 N range lamp 21 inhibitor switch 24 N range Lamp signal output circuit 25 N range lamp signal input circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Hamano 5-3-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (5)

[Claims] 1. A shift indicator having a range indicator lamp, which displays the current shift range position by the range indicator lamp, and an oil temperature detector which detects an oil temperature and outputs an oil temperature warning signal according to the detection result. And a means for blinking the predetermined range indicator lamp of the shift indicator to flash when an oil temperature warning signal is output from the oil temperature detection means. Temperature warning device. 2. The automatic vehicle has a failure detection means for detecting a failure, and when a failure warning signal indicating a failure warning is output from the failure detection means, the blinking means outputs the oil temperature warning signal. The oil temperature warning device for an automatic vehicle according to claim 1, wherein the predetermined range indicator lamp blinks at a speed different from the corresponding flashing speed. 3. The blinking means blinks the predetermined range indicator lamp by prioritizing the signal from the failure detection means with respect to the signals from the oil temperature detection means and the failure detection means. The oil temperature warning device for an automatic vehicle according to claim 2. 4. The shift indicator is arranged in a meter panel in a vehicle and / or beside a shift lever for selecting a shift range position.
Automatic vehicle oil temperature warning device described in. 5. A shift indicator having a range indicator lamp, which displays the current shift range position by the range indicator lamp, and an oil temperature detector for detecting the oil temperature and outputting an oil temperature warning signal according to the detection result. In an automatic vehicle including means, an oil for an automatic vehicle including lighting means for lighting a predetermined range indicator lamp of the shift indicator when an oil temperature warning signal is output from the oil temperature detecting means. Temperature warning device.