JPH0221302Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a constant speed cruise control device, and particularly relates to an improvement of a display device of a constant speed cruise control device for an automobile.

(Prior art) An electronic control circuit is combined with a negative pressure servo of an automobile engine, and a desired set vehicle speed signal is stored in this control circuit, and a constant speed signal obtained by a speed sensor during driving is inputted and replayed. 2. Description of the Related Art Constant-speed travel control devices that control a constant travel speed by comparing signals are known.

Generally, in this type of device, the constant speed running state is temporarily canceled when the vehicle is decelerated due to a brake operation or the like while the vehicle is running at a constant speed. Further, in order to automatically restore the vehicle speed to the original set speed, a return function is usually provided in which the occupant operates a resume switch (resume operation).

However, in the conventional constant speed cruise control device,
When a set operation for constant speed driving was performed, or when the set state was temporarily canceled after being set, the set vehicle speed was not displayed.

For this reason, even if the resume operation is performed, the set vehicle speed is not clearly indicated, giving the driver a feeling of anxiety.

Therefore, during resume operation, only the light emitters corresponding to the set vehicle speed are displayed in a display area that is different from the normal vehicle speed display area and is composed of a plurality of light emitters arranged intermittently in a row. There is also a vehicle in which the actual vehicle speed, which has been decelerated from that speed, is displayed by emitting light using each light emitting body below the portion corresponding to the actual vehicle speed (see Japanese Utility Model Application No. 58-48110).

However, with this type of device, the set vehicle speed is displayed only when the vehicle is resumed, so it is not possible to confirm the set vehicle speed sufficiently, and after the vehicle resumes the vehicle, it may be difficult to confirm due to downhill driving or variations in machine accuracy. When the actual vehicle speed exceeds the set vehicle speed, the light-emitting display portion of the set vehicle speed overlaps with the light-emitting display portion of the actual vehicle speed, and it is necessary to alert the driver. The problem is that it is not done. Furthermore, as described above, it is necessary to make the driver aware of the situation in which the actual vehicle speed exceeds the set vehicle speed, not only during the resume operation.

In addition, in the display part made up of a plurality of light emitters arranged intermittently in a row similar to the one described above, only the light emitters corresponding to the set vehicle speed are made to blink, and the part corresponding to the actual vehicle speed is displayed. There are some types of light-emitting display using the following light-emitting bodies (see Japanese Patent Laid-Open No. 182171/1983).

However, with such a device, once the constant speed cruise control device is set, the set vehicle speed is displayed blinking until it is reset, which is a problem for the driver. Moreover,
Since the system does not have a configuration to display the set vehicle speed when resuming, the set vehicle speed cannot be confirmed when resuming.

(Purpose of the invention) This invention was made in an attempt to eliminate the drawbacks of the prior art as described above. To provide a set vehicle speed display device for a constant speed cruise control device capable of displaying this and calling a driver's attention when the vehicle speed exceeds a set vehicle speed.

(Structure of the invention) In order to achieve this purpose, there is a first display section that displays the traveling speed, and a display section that is arranged near the first display section and displays the speed range in which the constant speed traveling device can be set. a display surface having a plurality of display elements arranged intermittently in a row and a second display portion for displaying the actual vehicle speed and the set vehicle speed of the constant speed cruise control device; It will be given to you. A time limit circuit that is activated by a set signal and a resume signal and sends out an output only for a certain period of time longer than the time required to confirm the display, and an oscillator that sends out a pulse signal that repeats at a shorter cycle than the continuous signal output by this time limit circuit. and display the actual vehicle speed while the vehicle is running using display elements corresponding to the actual vehicle speed and lower vehicle speeds, and when the time limit circuit is activated, the set vehicle speed is displayed blinking with an oscillator pulse while the time limit circuit is activated. In addition, a drive display circuit is provided which flashes the set vehicle speed using pulses from an oscillator when the actual vehicle speed exceeds the set vehicle speed.

Incidentally, the time limit circuit may be configured to stop outputting when a passenger resets the circuit.

(Function) During driving, the actual vehicle speed is displayed on the first display section, and when the actual vehicle speed is within the range of the speed displayed on the second display section, the second display section is displayed based on the operation of the drive display circuit. In the display section, the actual vehicle speed is also displayed in an analog manner using display elements corresponding to the actual vehicle speed and lower vehicle speeds.
In this way, when the vehicle is running, the actual vehicle speed is displayed on the first and second display portions.

When the constant speed cruise control device is set, the set vehicle speed is flashed on the second display section for a certain period of time during which the time limit circuit is activated.

Therefore, it is possible to reliably confirm that the constant speed cruise control device has been set and the set vehicle speed.

Moreover, since this blinking is performed for a certain period of time, this blinking is not bothersome. still,
In the device according to claim 2 of the utility model registration, it is possible to stop the blinking by a reset operation by the passenger before the blinking stops due to the completion of the operation of the time limit circuit.

During operation of the constant speed cruise control device, even when the brake is depressed to temporarily decelerate and then a resume operation is performed, the set vehicle speed is displayed blinking for a certain period of time in the second display section.

Since the actual vehicle speed is also displayed at the same time in this second display section, the difference between the actual vehicle speed and the stored set vehicle speed can be easily and accurately confirmed in an analog manner during the resume operation. Further, the set vehicle speed is not flashed during the speed return due to this resume, so there is no inconvenience as described above.

For example, when driving at a constant speed using the constant speed driving control device, including when resuming,
Even when the actual vehicle speed exceeds the set vehicle speed due to a downhill slope on the road or the influence of mechanical variations, the set vehicle speed is displayed blinking. In this case, when displaying the actual vehicle speed, display elements corresponding to the actual vehicle speed and elements corresponding to lower vehicle speeds are displayed, and display elements corresponding to the set vehicle speed are also included in this display state. However, this part is displayed blinking, so you can check the set vehicle speed without it being hidden in the actual vehicle speed display.
It can be known that the actual vehicle speed exceeds the set vehicle speed as described above.

Therefore, the driver's attention is urged and the driver can perform an operation corresponding to such an increase in speed.

(Embodiments of the invention) Examples of the invention will be described below with reference to the accompanying drawings.

FIG. 1 is a system diagram showing an embodiment of this invention.

According to the figure, a timer 10, a reference oscillation circuit 1
1, frequency dividing circuit 23, AND gate 12, actual vehicle speed display drive circuit 15, selection circuit 16, and display circuit 1
7 is shown. In addition, the actual vehicle speed display drive circuit 1
5 is a timing control circuit 18 and an AND gate 1
9, a counter 20, and a register 21.

The timer 10 is activated by a set signal a from the constant speed cruise control device and a previous set vehicle speed signal m from the set vehicle speed storage circuit 40, and outputs an output signal b only for a certain period of time. For example, it can be configured with a monostable multivibrator or a digital counter.

Note that the certain period of time is longer than the time required to check the display.

Further, the previous set vehicle speed signal m is inputted via the gate 41 in response to the signal r generated by the resume operation.

The reference oscillation circuit 11 sends out a so-called clock signal g, and has a duty ratio such that the blinking of the display (described later) is easily visible. This clock signal g is input to one of the AND gate 19 and the counter circuit 20 via the timing control circuit 18, and the actual vehicle speed is displayed on the display circuit 17 based on the vehicle speed signal i. Further, the output signal of the reference oscillation circuit 11 is outputted as a frequency divided signal c of the frequency dividing circuit 23 and inputted to one side of the AND gate 12.

Therefore, the set signal a, the output signal b of the timer 10, and the clock signal c are, for example, as shown in FIG.
If it is as shown in b and c, and gate 1
The output signal of No. 2 is as shown in d of the same figure.

Further, assuming that the clock signal g of the reference oscillation circuit 11, the signal h of the timing control circuit 18, and the vehicle speed signal i are as shown in FIG. 2g, h, and i, respectively, the output signal i of the AND gate 19 is as shown in FIG. The result will be as shown in j.

The display circuit 17 includes, for example, a display portion made up of a plurality of light emitting segments and a driving circuit for the segments. The light emitting segment may be, for example, a fluorescent tube,
Various types such as LEDs and liquid crystals can be used.
Of course, the overall configuration of the display circuit 17 including the drive circuit 15 differs accordingly. Furthermore, it goes without saying that other display devices such as a CRT may be used without using light-emitting segments.

FIG. 3 shows an example of a display screen having a display portion of such a display circuit 17 and disposed in the driver's seat.

This display surface 30 includes a first display section 31 that digitally displays the traveling vehicle speed, and a plurality of light emitting display elements 3 arranged intermittently in a row below this display section 31.
2a, and a second display portion 32 that displays the set vehicle speed (constant running vehicle speed) set by the passenger's set operation and the actual vehicle speed.

The first display portion 31 is formed by, for example, three sets of seven fluorescent tube segments 31a, and in the drawing, 50 km/h is displayed.

The second display section 32 includes light-emitting display elements 32a such as LEDs arranged intermittently in a horizontal row, and a scale 3 displaying the set speed displayed below the light-emitting display elements 32a.
Consists of 3. In the drawing, one light-emitting display element 32b indicates that the set vehicle speed is around 80 km/h, and the actual vehicle speed is around 50 km/h. This second display portion 32 only shows a speed range (30 km/h to 110 km/h) in which constant speed running is possible. This speed range is determined based on practical driving convenience.

The selection circuit 16 gives priority to the signal d from the AND gate 12 and displays it, and causes the set vehicle speed to be displayed blinking in the second display section 32.

As is clear from the above description, the actual vehicle speed display drive circuit 15 receives the vehicle speed signal i within a certain time width (corresponding to the signal in FIG. 2h) given by the timing control circuit 18.
The number of pulses is counted by a counter 20 and temporarily held in a register 21 for synchronization control.

As is clear from the above description, the set vehicle speed display drive circuit 51 outputs an output signal d, which is a constant pulse signal, when the set signal a or the resume signal r is input to the timer 10.

Next, the operation of this embodiment will be explained with reference to FIG. As can be seen from the above, signals a~
d, g to h correspond to a to d, g to h in FIG.

As shown in Figure 3, for example, if the driver's speed is 80
Suppose that the constant speed cruise control device is set when the speed reaches Km/h.

As a result of this operation, the set signal a is given, so the timer 10 sends out the output signal b for a certain period of time. While the timer 10 is operating, the AND condition of the AND gate 12 is satisfied, so the output signal d of the AND gate 12 is input to the display circuit 17. Therefore, the element 32b of the second display portion blinks at the repetition period of the frequency division signal c of the frequency division circuit 23, indicating to the driver that the constant speed cruise control device has been set.
The set vehicle speed is displayed to alert you.

Incidentally, the operating time of the timer 10 is sufficient for checking the display.

Further, a flip-flop may be used in place of the timer 10, and the flip-flop is set by the set signal a, and a reset button is separately provided, and the reset button is operated or the reset signal is activated. It is also possible to reset the flip-flop so that the output signal b becomes logic "0". Therefore,
In this specification, the term "time circuit" includes various types of circuits such as these.

However, in the above case, the actual vehicle speed is always displayed on the display circuit by the actual vehicle speed display drive circuit 15 via the selection circuit 16, but when setting, the output signal d of the AND gate 12 is given priority.
The display element corresponding to the set vehicle speed blinks, and the display elements corresponding to the actual vehicle speed and lower vehicle speeds, other than this display, light up to display the actual vehicle speed (50 km/h in FIG. 3).

In the above embodiment, the first and second display portions 31 and 32 of the display surface 30 are segment displays as shown in FIG. 3, as an example. However, as mentioned above, it is also widely known in the computer field to display using a CRT. For example, video RAM or attribute RAM can be appropriately selected using a set signal from a constant speed cruise control device to display a similar display. This is easy for a person skilled in the art.

Therefore, in this specification, "a plurality of display elements arranged intermittently in rows" refers not only to elements that are explicitly present on the display surface, such as LEDs, but also to elements that are hidden in the background, such as video RAM. They are arranged in columns, and this also includes cases in which they appear on the display screen as appropriate during display. Further, it goes without saying that this type of display may be performed not only in the horizontal direction as shown in FIG. 3, but also in the vertical direction.

This invention is not limited to the above-mentioned embodiments and modifications, but includes various contents, and in particular, it is possible to change the display color of the set speed on a CRT display by utilizing attribute RAM. It is easy to do and includes such content.

(Effects of the invention) According to the invention, since the set vehicle speed is displayed blinking when the constant speed cruise control device is set and when the vehicle is resumed, it is possible to confirm that the constant speed cruise control device has been set, the set vehicle speed, and the actual vehicle speed when resuming. This has the effect that it is easy to confirm the difference between the set vehicle speed and the set vehicle speed, and since the set vehicle speed flashes only for a certain period of time, there is no need to worry about the continued flashing. .

In addition, even if the actual vehicle speed exceeds the set vehicle speed, the set vehicle speed will be displayed in a blinking manner, informing the driver that they are in a situation where they must be careful. This has the effect of being able to call attention to things.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of an embodiment of this invention, FIG. 2 is a timing chart showing the operation of the embodiment of FIG. 1, and FIG. 3 is an explanatory diagram of a main part of an embodiment of this invention. 10...Timer (time limit circuit), 11...Reference oscillator, 15...Actual vehicle speed display drive circuit (drive display circuit), 16...Selection circuit (drive display circuit), 17...
...Display circuit (drive display circuit), 30...Display surface,
31...First display portion, 32...Second display portion, 51...Set vehicle speed display drive circuit (drive display circuit), a...Set signal, r...Resume signal.

Claims (1)

[Claims for Utility Model Registration] 1. A first display section that displays the traveling speed, and a display section disposed near the first display section that intermittently displays the speed range in which the constant speed traveling device can be set. a display surface having a plurality of display elements arranged in a row and a second display portion for displaying the actual vehicle speed and the set vehicle speed of the constant speed cruise control device; , a time limit circuit that is activated by a set signal and a resume signal and sends out an output only for a certain period of time longer than the time required to confirm the display, and a pulse signal that repeats at a shorter cycle than the continuous signal output by this time limit circuit. an oscillator, and displays the actual vehicle speed while the vehicle is running using display elements corresponding to the actual vehicle speed and lower vehicle speeds, and when the timer circuit is activated, the set vehicle speed is flashed by the pulses of the oscillator while the timer circuit is activated. A set vehicle speed display device for a constant speed cruise control device, comprising: a drive display circuit that displays the set vehicle speed and blinks the set vehicle speed using an oscillator pulse when the actual vehicle speed exceeds the set vehicle speed. . 2. A set vehicle speed display device for a constant speed cruise control device according to claim 1, wherein the time limit circuit is configured to stop outputting when a reset operation is performed by a passenger.