JPH0515047Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a torque display device for a four-wheel drive vehicle that displays the torque ratio between the front wheels and the rear wheels of the vehicle.

[Conventional technology]

As a conventional torque display device, there is one shown in FIG. 3, for example. This has a car picture P that is a reproduction of a car on the display panel,
Bar graphs A and B composed of display segments 61 to 70 and 71 to 80 are installed at the positions of the front wheels and rear wheels of this car picture P. The display segments 61-70, 71-80 are composed of light emitting diodes D61-D70, D71-D80, etc., which will be described later.

FIG. 4 is a block diagram of a torque display device that lights and displays the bar graphs A and B. In the figure, reference numeral 81 calculates a torque distribution ratio for the front wheels based on a signal from a torque sensor (not shown) and responds accordingly to the distribution ratio. 82 is a driver that lights up the light emitting diodes D61 to _D80 constituting the display segments 61 to 80 based on the lighting signals, and ₈₃ is an inverter.

Now, the microcomputer 81 calculates the torque distribution rate for the front wheels based on the signal from the torque sensor, and if the calculated distribution rate is, for example, 10%, the microcomputer 81 outputs a lighting signal from the output terminal _Q1 . In response to this lighting signal, the driver 82 lights up the light emitting diode D61 of bar graph A. On the other hand, since the signals at the output terminals Q ₂ to _{Q 10} of the microcomputer 81 are inverted by the inverter 83, the light emitting diode D7 in bar graph B
1 to D79 emit light, display segments 61, 71
~79 lights up. As a result, the torque distribution ratio between the front wheels and the rear wheels is displayed by the lengths of the lit bar graphs A and B. Similarly, the torque distribution rate is displayed according to the distribution rate of the front wheels and rear wheels by the length of the lit bar graphs A and B.

[Problem that the invention attempts to solve]

However, in such a conventional torque display device, bar graphs A and B are installed at the positions of the front wheels and rear wheels of the car picture P, and the bar graphs A,
Since the torque distribution ratio of the front and rear wheels is displayed depending on the length of the B light, it feels strange to the senses, and with only this torque distribution ratio, it is difficult to recognize the slip situation of the wheels due to the torque difference. The problem was that it was difficult to do. Therefore, focusing on these problems, we constructed the tire display picture of the front and rear wheels on the car picture into multiple display segments, and further reduced the number of points in the circumferential direction of the multiple display segments arranged in a circle. We have previously developed a driving status display device for four-wheel drive vehicles that can make the wheel images appear as if they are rotating, but the display by subtracting points from multiple display segments is In order to make the point reduction display more vivid at night, the brightness of the display segment is increased during the day, and at night the brightness is lowered to improve visibility during the day and night.

However, when the display segments are of high brightness, it is possible to effectively display the vehicle picture as if it were rotating by subtracting points in groups of two segments, for example. , when the segment has low brightness, 2
Grouping into individual segments did not make the wheel picture appear as if it was rotating, and there were also problems in that it created a sense of discomfort and lacked marketability.

[Purpose of invention]

The present invention was developed to solve this problem, and the number of lighting segment groups when the display segments are lit at low brightness is doubled compared to the number of segment groups when the display segments are lit at high brightness. Provided is a driving status display device for a four-wheel drive vehicle that is capable of providing an extremely effective lighting display that does not cause discomfort even when the lighting segment is lit at low brightness, especially in a dark place. The purpose is to

[Example of idea]

The present invention will be explained in detail below based on the embodiments shown in FIGS. 1 and 2.

In FIG. 1, numeral 1 is a display board of a display device, and on this display board 1 is shown a car picture 2 that is a reproduction of a front-wheel drive type car. A front wheel display section 4 and a rear wheel display section 5 are formed by arranging a large number of display segments 3, such as light emitting diodes, liquid crystal segments, etc., in a circular manner. Furthermore, a viscous coupling display section 6 connecting the front and rear wheels is also formed of display segments. 7 and 8 are bar graphs placed before and after the car picture 2, and these bar graphs 7 and 8 are similar to the bar graph A described in the conventional example above.
and B, so the bar graphs 7 and 8
A description of the configuration will be omitted.

In FIG. 2, reference numeral 10 denotes an arithmetic circuit that performs calculations based on sensor signals corresponding to the driving torque; 11 receives signals from the arithmetic circuit 10;
6 and bar graphs 7 and 8 are shown in FIG. Reference numeral 12 denotes a switch for lighting the illumination lamp 13. By turning on this switch 12, the control circuit 14 operates, and the number of segments of the display segment group to be lit in the display segment 3 can be controlled. ing.

Next, the operation of the above embodiment will be explained.
Now, when the car is stopped, all the display segments 3 in the front wheel display section 4 and the rear wheel display section 5 are lit up, but when the car is running, the front wheel display section 4
Since a total of four display segments, two corresponding to the diameter direction of the display segments 3 of the rear wheel display section 5, are sequentially subtracted in the circumferential direction, each of the circular display sections 4 shaped like a tire and 5 looks as if it is rotating. Therefore, the arithmetic circuit 10 performs arithmetic processing on the output from a rotation sensor (not shown) when the vehicle is running, based on the sensor signal, and as a result, if the front wheel drive torque and the rear wheel drive torque are approximately equal, Front wheel display section 4 and rear wheel display section 5
The point reduction of each display segment 3 becomes equal, and the front wheel display section 4 and the rear wheel display section 5 display a point reduction as if they were rotating at a constant speed, and at the same time, the front wheel display section 4 and the rear wheel display section 5 display the point reduction as if they were rotating at a constant speed. The torque ratio is displayed by lighting up bar graphs 7 and 8. Therefore, when it is detected from the output from a wheel rotation sensor (not shown) that the rotation speed of the front wheels is faster than the rotation speed of the rear wheels, the point deceleration of the display segment 3 on the front wheel display section 4 is accelerated. As a result, the rotation speed displayed on the front wheel display section 4 is displayed as being twice as fast as the rotation speed displayed on the rear wheel display section 5, and the mud splatter display section 7 lights up. This indicates that the front wheel is slipping. Further, due to the rotation difference between the two wheels at this time, the viscous coupling display section 6 is also lit up. If the slip of the front wheels is eliminated, the rotation of the front and rear wheels becomes constant, the point deceleration of the front wheel display section 4 and the rear wheel display section 5 becomes the same, and both the front and rear wheels rotate normally. Something is indicated by the constant speed dot reduction of the display segments 3 on the displays 4 and 5, and the display 6 goes out.

In this way, according to this embodiment, the front wheel display section 4
The rotational status of the front and rear wheels is displayed by subtracting the points of each display segment 3 on the rear wheel display section 5. In the daytime, since the surrounding area is bright, the lighting brightness of the display segment 3 is reduced. At this time, the lighting group of display segment 3 is set to two as described above, and furthermore, a total of four lighting segments are set in correspondence with the diameter direction, but at night, the lighting When the switch 12 is turned on, the control circuit 14 operates to display the display segment 3.
The brightness of the lighting segments is reduced, and the number of lighting segments is increased from two lighting segments to four lighting segments, thereby doubling the number of lighting segment groups.

Therefore, in dark places such as at night, visibility is improved by reducing the brightness of the lighting segments without causing glare, and by doubling the number of lighting segment groups, the wheel picture is The display looks natural, as if it were being rotated, and has the effect of increasing its marketability.

[Summary of the idea]

As described above, the present invention includes an arithmetic circuit 10 that calculates the rotational speed of the front and rear driving wheels based on a sensor signal corresponding to the rotational speed of the front and rear driving wheels of a four-wheel drive vehicle, and Two wheel display sections 4 and 5 each having a display modeled after the side figure of a vehicle including a plurality of display segments 3 arranged in a circle indicating front and rear drive wheels, and at least one of the drive wheels. A display board 1 including a slip display section 7 disposed near a wheel display section of the wheel display section 1; display segments of the two wheel display sections are selectively turned on in sequence in the rotational direction of the wheel based on the output of the arithmetic circuit 10; When the driving circuit 11 and the lighting switch 18 are turned on, the driving circuit 11 and the lighting switch 18, which drive the slip display section corresponding to one of the front and rear wheels that rotates faster than the other wheel based on the output of the arithmetic circuit, are turned on. Wheel display parts 4, 5
This driving state display device for a four-wheel drive vehicle is characterized by comprising a drive circuit that increases the number of display segments of the light switch 18 from the number of display segments when the lighting switch 18 is not lit.

[Effect of idea]

Therefore, according to the running status display device of this invention,
In dark places such as at night, the brightness of the lighting segments is reduced to improve visibility without causing glare, and by doubling the number of lighting segment groups, the wheel picture can be rotated. The product is displayed in a way that makes it look natural, as if it were a product, and has the effect of increasing its marketability.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a display board showing an embodiment of the driving state display device according to the present invention, Fig. 2 is an explanatory diagram of its circuit, Fig. 3 is an explanatory diagram of a conventional example, and Fig. 4 is an explanatory diagram of a conventional example. It is a circuit explanatory diagram. 1... Display board, 2... Car picture, 3... Display segment, 4... Front wheel display section, 5... Rear wheel display section, 6... Viscous cut spring, 7, 8... Bar graph, 10... Arithmetic circuit, 11...drive circuit,
12...Lighting switch, 13...Lighting light, 14...
...control circuit.

Claims (1)

[Scope of utility model registration request] A calculation circuit 10 that calculates the rotation speed of the front and rear drive wheels based on a sensor signal corresponding to the rotation speed of the front and rear drive wheels of a four-wheel drive vehicle, and a side figure of a vehicle including the front and rear drive wheels. two wheel display sections 4 comprising a plurality of display segments 3 arranged in a circle, each having a display and indicating the front and rear drive wheels;
5 and a display board 1 including a slip display section 7 disposed near the wheel display section of at least one of the driving wheels; is sequentially driven to selectively light up in the direction of wheel rotation,
And when the driving circuit 11 and the lighting switch 18, which drive the slip display section corresponding to one of the front and rear wheels that rotates faster than the other wheel, are turned on based on the output of the arithmetic circuit, the wheel display section A driving state display device for a four-wheel drive vehicle, comprising a drive circuit that increases the number of display segments 4 and 5 from the number of display segments when the lighting switch 18 is not lit.