JPH0515046Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE PRESENT APPLICATION Field of the Invention This invention relates to a torque display device for a four-wheel drive vehicle, which displays the torque ratio between the front and rear wheels of the vehicle.

PRIOR ART

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.

[Purpose of invention]

The present invention was developed by focusing on these conventional problems, and consists of a plurality of display segments for front and rear tire display pictures applied to car pictures.
Furthermore, the multiple display segments arranged in a circle are made to blink in the circumferential direction to make it appear as if the wheel picture is rotating, and at the same time a pattern is displayed to indicate whether or not the wheel is slipping at the speed of the blinking. It is an object of the present invention to provide a driving state display device for a four-wheel drive vehicle that allows the user to visually perceive the slippage state of the wheels without causing any discomfort.

[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, 9 is an arithmetic circuit that performs calculations based on a sensor signal corresponding to the driving torque, and 10 is an arithmetic circuit that receives a signal from the arithmetic circuit 9 and causes the above-mentioned display sections 4, 5, 6 and bar graphs 7, 8 to display light. The drive circuit for this is shown.

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 four display segments, two each corresponding to the diameter direction of the display segment 3 of the rear wheel display section 5, are sequentially blinked in the circumferential direction, each of the circular display sections 4 and 5 shaped like a tire is It looks as if it is rotating. Therefore, the calculation circuit 9 performs calculation processing based on the sensor signal using the output from the rotation sensor (not shown) when the vehicle is running.
As a result, if the front wheel drive torque and the rear wheel drive torque are approximately equal, the blinking of each display segment 3 of the front wheel display section 4 and the rear wheel display section 5 will be equal, and the front wheel display section 4 and the rear wheel display section 5 will The display blinks as if it were rotating at a constant speed, and at the same time, the driving torque ratios of the front wheels and rear wheels are displayed by lighting in 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 front wheel display section 4
The blinking speed of the display segment 3 at It is displayed that the slip is occurring. Furthermore, due to the difference in the rotational speed of both wheels at this time, the viscous coupling display section 6 is also lit up. When the above-mentioned front wheel slip is resolved, the front and rear wheels rotate at the same speed, and the blinking speeds of the front wheel display section 4 and the rear wheel display section 5 become the same, indicating that both the front and rear wheels are rotating normally. This is displayed by constant-speed blinking of display segments 3 on display sections 4 and 5, and display section 6 is turned off.

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 flashing each display segment 3 on the rear wheel display section 5, and in particular, the rotational speed difference (front wheel slip) between the front wheel rotational speed and the rear wheel rotational speed is displayed. If this occurs, the flashing speed of the display segment on the front wheel display section 4 will be doubled, thereby clearly indicating that the front wheel is slipping, and making it possible to accurately and accurately monitor the wheel rotation situation in a four-wheel drive vehicle. There are effects that can be easily confirmed.

[Summary of the invention] As described above, the present invention includes an arithmetic circuit 9 that calculates the rotational speed of the front and rear driving wheels of a four-wheel drive vehicle based on a sensor signal corresponding to the rotational speed of the front and rear driving wheels; two wheel display sections 4 and 5 having a display modeled after a side figure of a vehicle including the front and rear drive wheels, and comprising a plurality of display segments 3 arranged in a circle indicating the front and rear drive wheels; circuit 9
The two wheel display units 4 and 5 based on the output of
A wheel display corresponding to one of the front and rear wheels that rotates faster than the other wheel based on the output of the arithmetic circuit; This is a running state display device for a four-wheel drive vehicle characterized by comprising a drive circuit 10 that causes a wheel display section to flash at a faster speed than other wheel display sections.

[Effect of idea]

Therefore, according to this driving state display device, the rotational status of the front wheels and rear wheels is displayed by blinking each display segment 3 on the front wheel display section 4 and the rear wheel display section 5, and in particular, the rotational speed of the front wheels and the rear wheel rotational speed are displayed. If a rotational difference (slip of the front wheel) occurs between the rotational speed of the front wheel and the front wheel, the blinking speed of the display segment on the front wheel display section 4 will be doubled, thereby clearly indicating that the front wheel is slipping. This has the effect of making it possible to accurately and easily check the rotation status of the wheels in a four-wheel drive vehicle.

[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, 9... Arithmetic circuit, 10... drive circuit.

Claims (1)

[Scope of utility model registration request] An arithmetic circuit 9 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 the vehicle including the front and rear drive wheels. two wheel display sections 4 and 5 each having a display segment 3 arranged in a circle and indicating the front and rear drive wheels;
The display segments 3 of the two wheel display sections 4 and 5 are sequentially driven to selectively light up in the wheel rotation direction, and one of the front and rear wheels rotates faster than the other based on the output of the arithmetic circuit. A driving state display device for a four-wheel drive vehicle, comprising a drive circuit 10 that causes a wheel display section corresponding to a wheel to flash at a faster speed than other wheel display sections.