JPH06105213B2 - Pattern running display for vehicle - Google Patents

Description

The present invention relates to a pattern running display device for a vehicle.

(Prior Art) To measure the exhaust gas of a vehicle such as an automobile, it is required to drive the vehicle according to the image of the driving pattern displayed on the display element such as CRT on the chassis dynamometer. To be done.

The driver can drive the vehicle according to the driving pattern by tracking the driving pattern while observing the index that moves according to the vehicle speed in the vehicle speed axis direction of the display element.

Conventionally, the vehicle speed display range by the display element is fixed,
Therefore, the driving pattern is displayed on the same display surface regardless of the actual vehicle speed.

(Problems to be Solved by the Invention) However, when the display element is installed in the test vehicle, a small display element, for example, 3 inches to 5 is used.
It becomes necessary to use a small one such as an inch.

However, in such a small-sized one, the display area is small, so that the operation pattern on the display surface becomes difficult to read.

An object of the present invention is to facilitate reading of a driving pattern displayed on a display surface of a display element.

(Means for Solving the Problem) The present invention provides the above-mentioned display when the actual vehicle speed of the test vehicle has changed by exceeding an upper reference value or a lower reference value defined within the range of the scale of the operation pattern on the display surface. The feature is that the scale of the driving pattern of the surface is automatically changed.

(Function) When the actual vehicle speed of the test vehicle changes beyond the upper limit or the lower limit within the scale displayed at that time, a scale in a range different from that before is displayed. Therefore, each time a certain range is exceeded, a different scale is displayed, so that even on the same display surface, the driving pattern is displayed on a wide range of scales.

Also, since the display surface is changed when the upper or lower limit of the displayed scale is exceeded, the actual vehicle speed may change slightly near the maximum or minimum value of the scale. However, the display surface does not change frequently and does not flicker.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, K is an input terminal which is placed on the chassis dynamometer and to which a vehicle speed signal sent from a test vehicle for which a running test is performed is given.

Reference numeral 1 is a storage element such as a disk or an IC memory in which operation patterns such as 10 modes and 11 modes are stored in advance. 2 is a microprocessor, ROM3 and RAM4
To command the graphic control element 5.

Further, the microprocessor 2 stores the command vehicle speed data in the driving pattern stored in the storage element 1 as, for example, 1
It is read every second and written in the video memory 6. The video memory 6 is composed of a red signal memory, a green signal memory, and a blue signal memory, and the microprocessor 2 writes data in each memory according to the desired color of the command vehicle speed.

When the data is written in the video memory 6, the graphic element 5 outputs the red signal, the green signal, and the blue signal (hereinafter referred to as RGB signals) of three systems separately. The color display element 8 graphically displays the operation pattern P as shown in FIG. 3 on the built-in display surface according to the RGB signal.

On the other hand, the vehicle speed signal given to the input terminal K is the input amplifier 10
Is given to the A / D conversion element 11 via. The vehicle speed signal is read by the microprocessor 2 and written in the video memory 6 as actual vehicle speed data.

As a result, the actual vehicle speed data is displayed on the color display element 8 with the mark of the index M by the same method as the driving pattern, as shown in FIG. The index M moves left and right along the vehicle speed axis direction according to the actual vehicle speed.

The driver operates by operating the accelerator pedal and the change lever at the test vehicle speed so that the index M on the display surface matches the driving pattern P.

In the above configuration, for example, it is assumed that the test vehicle travels at the speed pattern shown in FIG. Before the traveling, the scale range on the display surface of the color display element 8 is 0 to 60 km / h, as shown in FIG.

In addition, for any scale display, the upper limit reference value and the lower limit reference value are set within the scale range.
Since the scale range displayed here is 0 to 60 km / h, the upper limit reference value is set to 50 km / h and the lower limit reference value is set to 0 km / h. This upper limit reference value is read from the storage element 1 by the microprocessor 2 and given to the D / A conversion element 12.

The comparison element 13 compares the upper limit reference value with the vehicle speed signal and transmits the result to the microprocessor 2 through the input element 14. In addition, the lower limit reference value of the microprocessor 2 is D /
It is given to the A conversion element 15.

The vehicle speed signal enters the comparison elements 13, 16 via the input amplifier 10. From time t ₀ to t ₂ , while looking at the operation pattern P and the index M on the scale as shown in FIG. 3 (a),
The driver drives the test vehicle.

At time t ₂ , the vehicle speed exceeds 50 km / h, so the output of the comparison element 13 is reversed. The microprocessor 2 knows the result through the input element 14 and gives a command to the graphic control element 5.

In response to this command, the graphic control element 5 displays on the color display surface 8 a scale range different from the conventional scale range, for example, 30 km / H to 90 km / h, as shown in FIG. 3 (b). As a result, from the time t ₂ performs the operation by this scale.

At the same time, the microprocessor 2 sets the D / A conversion element 12 to 80 k
An upper limit reference value of m / h is given, and a lower limit reference value of 40 km / h is given to the D / A conversion element 15. It is the same as the previous example that the upper and lower reference values are set within the scale range.

The lower limit reference value is set to be less than or equal to the maximum value of the scale range. Therefore, for example, even if the actual vehicle speed fluctuates around 50 km / h, the display in FIG. 3 (b) is not frequently changed with this.

Then, at time t ₃ , the vehicle speed becomes 72 km / h, and then descends. When the vehicle speed reaches 40 km / h at time t ₄ , the comparison factor
The output of 16 is inverted. The microprocessor 2 knows the result through the input element 14 and gives a command to the graphic control element 5.

The graphic control element 5 starts from this time in FIG. 3 (c).
As shown in the first scale, ie 0km / h to 60k
It is displayed on the color display element 8 in the scale of m / h. Therefore, from time t ₄ , operation is performed on this scale. Even in this case, upper limit reference value 40km / h, lower limit reference value
0km / h is set as before.

Then, the upper limit reference value is set to be greater than or equal to the minimum value of the scale range. Therefore, even if the actual vehicle speed fluctuates around 30 km / h, for example, the display of FIG. 3 (c) is not frequently changed.

FIG. 4 is a flow chart showing the above operation.

In the above explanation, the case where the maximum vehicle speed is 72 km / h was explained, but even if this changes to 120 km / h, 182 km / h, the upper and lower reference values are set to the magnitude of the vehicle speed. It becomes possible to operate on a plurality of scales in the same manner by changing it according to the above.

Further, on the display surface of each display element, the left end is shown as the maximum speed, but the right end may be shown as the maximum value. Further, although the vehicle speed is shown on the horizontal axis in the example of the drawing, this may be shown on the vertical axis.

Further, although the above-described embodiment has the configuration for analog processing using the D / A conversion element and the comparator, etc., instead of this, a configuration for digital processing using a microcomputer or the like. It is also possible to

(Effects of the Invention) As described in detail above, according to the present invention, even when the display area of the display surface of the display element is small, it is not difficult to identify the driving pattern displayed on the display surface,
Further, for this reason, even if the display surface is changed, or even if the vehicle speed changes near the boundary of the scale, the display surface does not change frequently.

[Brief description of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a speed pattern diagram, FIG. 3 is a display mode diagram of a display surface, and FIG. 4 is a flow chart. 1 ... Storage element, 2 ... Microprocessor, 5 ... Graphic control element, 8 ... Display element, K ... Input terminal to which vehicle speed signal is given, P ... Driving pattern, M ... Index,

Claims (1)

[Claims] 1. A pattern running display device for a vehicle, which displays a driving pattern for a mode running test of a test vehicle carried out on a chassis dynamometer by a video, wherein an actual vehicle speed of the test vehicle is displayed on a display surface. When the change exceeds the upper limit reference value or the lower limit reference value set within the scale range of the pattern, a means for automatically changing the scale range of the operation pattern of the display surface to a different display surface is provided, The minimum or maximum value of the changed scale range of the new display surface is set to a value smaller or larger than the maximum or minimum value of the scale before the change. Display device.