JPS629065B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an indicator for a constant speed running device installed in an automobile, and more specifically to a display device for a constant speed running device equipped with a resume function, which simultaneously displays the returned vehicle speed and the actual vehicle speed when the resume function is activated. The present invention relates to a display device that displays the operating state of the resume function so that the driver or the like can easily confirm the operating state of the resume function. Conventionally, a controller (electronic control circuit) is combined with a negative pressure servo, etc., and this controller stores a constant set vehicle speed signal and inputs an actual vehicle speed signal obtained by a speed sensor while the vehicle is running. 2. Description of the Related Art There is a constant speed traveling device that controls and maintains a vehicle at a constant traveling speed by comparing a speed signal with a set vehicle speed signal. This constant speed traveling device is equipped with a device that automatically returns the vehicle to the original set speed by operating a switch (resume switch) when the constant speed traveling state is temporarily canceled by decelerating by brake operation etc. while driving at a constant speed. It is equipped with a resume function that allows you to return to normal condition. However, in such conventional constant speed driving devices, when the constant speed driving state is temporarily canceled, the original set vehicle speed etc. are only stored inside the controller, and no display is displayed externally. Because the system was not equipped with such means, when the driver forgot the original vehicle speed setting (return vehicle speed) when operating the brakes, the return vehicle speed when operating the resume switch was unclear. This invention was made by focusing on such conventional problems, and extracts from the constant speed traveling device the memorized vehicle speed signal before cancellation and the actual vehicle speed signal during deceleration driving, and calculates the memorized vehicle speed before cancellation. and the repetition frequency corresponding to the actual vehicle speed during deceleration driving, respectively, and from the respective counted values, the memorized vehicle speed before cancellation and the actual vehicle speed during deceleration driving are determined by the light emitting body. The purpose of this invention is to solve the above-mentioned problems by displaying light. The present invention will be explained below based on the drawings. 1 to 3 are diagrams showing embodiments of the present invention. First, to explain the configuration, in Figure 1, the reference numeral
Reference numeral _U1 denotes a controller in the constant speed traveling device, and a speed sensor ₁ is connected to the controller U1, and a set switch (setting push switch) and a resume switch (not shown) are also connected to the controller U1. When the set switch is operated when the vehicle reaches the desired speed, the vehicle speed at the time of this operation is set as the set vehicle speed by controller _U1.
This is what is stored in the memory. The vehicle is thereafter controlled to travel at this set vehicle speed. The resume switch is a switch for resetting the vehicle speed. When the vehicle is running at a constant speed and the constant speed state is temporarily canceled due to deceleration due to brake operation, etc., the vehicle speed can be reset to the original state by operating the resume switch. This is to automatically return the vehicle to the speed when driving at a constant speed. In this invention, the controller
A memorized vehicle speed signal before the temporary release of the constant speed driving state and an actual vehicle speed signal during deceleration driving during the temporary release are derived from _U1 , and the following circuits are connected to each derivation line. That is, first, a first waveform shaping circuit _U2 is connected to the memorized vehicle speed signal deriving line ₁ , and the output terminal of this first waveform shaping circuit _U2 is connected to one input terminal of the first AND gate _G1 . There is. After the first AND gate _G1 , a first counter _U3 , a first
A latch circuit U ₄ , a decoder U ₅ and a first driver U ₆ are connected in sequence, and the output terminal of the first driver U ₆ is connected to a display U ₇ constituted by light emitting means. The first counter _U3 outputs, for example, a binary 8-digit signal corresponding to the number of input pulses. In addition, the display U ₇ is arranged in the instrument panel 2 of the automobile as shown in FIGS. There is. Note that reference numerals 5a to 5d in FIG. 2 indicate meters such as a fuel gauge and a speedometer. On the other hand, the actual vehicle speed signal deriving line ₂ side is configured almost the same as the memorized vehicle speed signal deriving line ₁ side, except that no decoder is provided. That is, the second waveform shaping circuit U ₈ is first connected to the actual vehicle speed signal deriving line ₂ , and this second waveform shaping circuit U ₈
The output terminal of G2 is connected to one input terminal of the second AND gate _G2 . And the second and gate
A second counter U ₉ , a second latch circuit U ₁₀ , and a second driver U ₁₁ are sequentially connected to the subsequent stage of G ₂ , and the output terminal of this second driver U ₁₁ is connected to the display unit U _{7 .}
It is connected to the. Only one display unit _U7 is provided, which is shared for displaying both the stored vehicle speed and the actual vehicle speed. Further, a common timing control circuit U ₁₂ is provided for both signal processing lines for the stored vehicle speed signal and the actual vehicle speed signal, and the control signal output from this timing control circuit U ₁₂ is transmitted to the first and second AND gates.
The other input terminal of G ₁ and G ₂ , the first and second counters U ₃ and U ₉ , and the first and second latch circuits
They are guided by U ₄ and U ₁₀ respectively. Next, the operation will be explained with reference to FIGS. 4a, b, and c. First, a constant set vehicle speed signal is stored in the controller _U1 by operating the set switch, and this set vehicle speed signal is compared with the actual vehicle speed signal during driving derived from the speed sensor 1. The speed shall be maintained under control. If a release operation is performed using the brake, etc. while driving at a constant speed, controller U ₁
The constant speed driving control function is temporarily canceled. At this time, the vehicle speed signal during constant speed driving before this release is stored in the resume function installed in the controller _U1 . Assume, for example, that the stored vehicle speed is 100 km/h. Next, this stored vehicle speed signal before release is transferred to a stored vehicle speed signal derivation line.
₁ side and the first waveform shaping circuit U ₂ in Figure 4 a.
After the waveform is shaped as follows, the first AND gate
Input to one terminal of _G1 . Here, the first AND gate G ₁ includes a timing control circuit U ₁₂ to a fourth AND gate G 1 .
A control pulse with a time width t ₁ sec as shown in FIG. b is input to the other terminal. Therefore, the first AND gate _G1 is opened for this time width _t1 sec, and outputs a memorized vehicle speed signal pulse within a certain time width as shown in FIG. 4c to the first counter _U3 . . Incidentally, if the time width _t1 is taken as a unit time, the number of pulses of the stored vehicle speed signal within this fixed time width corresponds to the repetition frequency (pulses/sec) corresponding to the stored vehicle speed. Next, the first counter _U3 receives a timing control signal from the timing control circuit _U12 , starts, and counts the stored vehicle speed signal pulses. Then, depending on the count number, that is, the vehicle speed, a signal with an 8-digit binary display as shown in the following table is directed to the first latch circuit _U4 .

[Table] Output. The first latch circuit _U4 operates in response to the timing control signal from the timing control circuit _U12 , temporarily stores the binary 8-digit display signal, and outputs this signal to the decoder _U5 . decoder
_U5 outputs a signal corresponding to the contents of the binary 8-digit input signal as follows. That is, if the stored vehicle speed is 100 km/h as mentioned above, the input signal to the decoder U ₅ is the binary 8-digit signal "01001000", and the output signal is the vehicle speed scale corresponding to this input signal.
This is a signal that drives only the light emitter 3 at 100 km/h to emit light. The output signal from the decoder U ₅ is input to the display unit U ₇ via the driver U ₆ , and as shown in FIG. The driver and others are visually informed that the speed is 100 km/h. On the other hand, due to brake operation, the vehicle speed is now 60, for example.
After the vehicle has been decelerated once to Km/h, the vehicle shall be operated to return to its original speed when traveling at a constant speed by operating the resume switch. When you turn on the resume switch, the resume function starts operating, and at the same time, the actual vehicle speed signal when decelerating, that is, the above 60 km/h.
A pulse train signal having a repetition frequency corresponding to the vehicle speed is output to the actual vehicle speed signal derivation line ₂ side. This actual vehicle speed signal during deceleration is processed by the second waveform shaping circuit _U8 and the following circuits in almost the same way as the memorized vehicle speed signal, and a binary 8-digit signal corresponding to the actual vehicle speed is generated. It is temporarily stored in the second latch circuit _U10 . The content of this binary 8-digit signal is, for example, "01010000" if the actual vehicle speed during deceleration is 60 km/h as described above.
Then, binary 8 corresponds to the actual vehicle speed during deceleration driving.
The digit output signal is input to the display unit U ₇ via the second driver U ₁₁ without being decoded, and as shown in Figure 3, each of the series of light emitters below the 60 km/h scale position emits light and decelerates. The driver is visually informed that the actual speed of the vehicle while traveling is 60 km/h. In this way, the actual vehicle speed during deceleration is determined by each light emitting body below the light emitter corresponding to the actual vehicle speed, and the memorized vehicle speed before cancellation is determined by the fact that only the light emitter corresponding to the memorized vehicle speed emits light. The driver and the like are intuitively informed of both the vehicle speed and the stored vehicle speed to be restored. The process of restoring the vehicle speed accompanying the operation of the resume function is also notified to the driver etc. by the light emitters 3 sequentially emitting light. Therefore, the return process due to acceleration can be visually perceived by the driver etc. in an analog manner.
Note that the light emitting body 3 may change the display color between when displaying the stored vehicle speed and when displaying the actual vehicle speed to facilitate the discrimination. Note that in the above embodiment, the controller U ₁
Although the case has been described in which the stored vehicle speed signal and the actual vehicle speed signal are derived as a pulse train signal with a repetition frequency corresponding to each vehicle speed, the present invention is not limited to this; This can also be applied when the signal is derived as an analog signal consisting of a level or the like. When using a signal derived as an analog quantity, a V-F (voltage-frequency) converter or the like may be used before the waveform shaping circuit to convert the signal into a signal having a frequency corresponding to the vehicle speed. As detailed above, according to the present invention, the stored vehicle speed signal before release and the actual vehicle speed signal during deceleration traveling are extracted from the constant speed traveling device, and the repetition frequency corresponding to the stored vehicle speed and the actual vehicle speed are adjusted. The repetition frequency is counted, and the memorized vehicle speed before the cancellation and the actual vehicle speed during deceleration driving are displayed using light emitting bodies from the respective counted values, so the driver is not aware of the resume function. The operating state can be clearly grasped visually, resulting in improved driving safety. In addition, on the display section (light emitting means), a plurality of light emitting bodies are arranged in a line corresponding to the vehicle speed, and the memorized vehicle speed before cancellation is displayed by only the light emitting bodies corresponding to the memorized vehicle speed; According to the embodiment in which the actual vehicle speed at the time is displayed by emitting light from each light emitting body corresponding to the vehicle speed below the actual vehicle speed, in addition to the above common effects, the vehicle speed can be restored by the operation of the resume function. The effect is that the process can be grasped more clearly with an analog feel.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the display device of the constant speed traveling device according to the present invention, Fig. 2 is a front view showing an example of the arrangement of the display part in the same embodiment, and Fig. 3 shows the display part of the same embodiment. 4a, b, and c are waveform diagrams showing examples of each signal waveform applied to the embodiment of the present invention, and FIG. 4a is a diagram showing a memorized vehicle speed signal or an actual vehicle speed signal. , FIG. 5B is a diagram showing the output signal of the timing control circuit, and FIG. 1C is a diagram showing the output signal of the AND gate. 3...Light emitter, 4...Vehicle speed scale, _G1 , _G2 ...
First and second AND gates, U ₁ ... controller, U ₂ , U ₈ ... first and second waveform shaping circuits,
U ₃ , U ₉ ...first and second counters, U ₄ , U ₁₀ ...
First and second latch circuits, _U5 ... decoder,
U ₆ , U ₁₁ ... first and second drivers, U ₇ ... display section, U ₁₂ ... timing control circuit.

Claims (1)

[Claims] 1. When the vehicle is controlled to a constant traveling speed by inputting an actual vehicle speed signal while the vehicle is running, and the vehicle is driven after temporarily canceling the constant traveling speed, the vehicle speed signal before the cancellation is controlled. An indicator installed in a constant speed traveling device having a resume function for storing and returning to the vehicle speed before the release, wherein the constant speed traveling device displays the memorized vehicle speed signal before the release and the temporarily released vehicle speed. A counter is provided that takes out the actual vehicle speed signal when the vehicle is running at a speed of 100 degrees, and counts a repetition frequency corresponding to the stored vehicle speed before the release and a repetition frequency corresponding to the actual vehicle speed during deceleration driving, and the count value outputted by the counter. 1. A display device for a constant speed traveling device, characterized in that a light-emitting means displays a memorized vehicle speed before the release and an actual vehicle speed when the vehicle is running after being temporarily released. 2 In the light emitting means, a plurality of light emitting bodies are arranged in a line corresponding to the vehicle speed, and the memorized vehicle speed before release is displayed by only the light emitting bodies corresponding to the memorized vehicle speed, while the actual vehicle speed during deceleration is displayed. An indicator for a constant speed traveling device according to claim 1, wherein each light emitting body corresponding to a vehicle speed lower than the actual vehicle speed is displayed by emitting light.