JPS58172718A - Constant-speed running device for vehicle - Google Patents

Abstract

PURPOSE:To eliminate the need to attach a dedicated switch by providing a decision making circuit consisting of a monostable multivibrator, timer, and two- input NAND gate. CONSTITUTION:The decision making circuit 8 generates a signal for starting a constant-speed running device when a driver turns on or off a hot-wire switch 7. By the output of this switch 7, the monostable multivibrator 9 is triggered to generate a signal H for a specific time and the signal is sent to the timer 10 and two-input NAND gate 11. Consequently, the gate 11 received the output of the monostable multivibrator 9 and the output signal of the timer 10 to send a signal L to a controller 3. On receiving the signal L, the controller 9 starts operating the constant-speed running device to put an actuator 4 and a throttle valve 5 in operation. Thus, the decision making circuit consisting of the monostable multivibrator 9, timer 10, and gate 11 is provided to use the switch 7 as the set switch of the constant-speed running device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant speed traveling device for a vehicle whose purpose is to maintain the speed of the vehicle at a speed desired by the driver.

Figure 1 is a block diagram of a conventional constant speed traveling device of this type.
In the figure, (1) is the set switch of the constant speed traveling device;
(21 is a vehicle speed sensor, (3) is a control device, (4) is an actuator, and +51 is a throttle valve that controls the engine output. In the figure, the vehicle speed sensor (21 is a control device that detects the speed of the vehicle and sends a vehicle speed signal Upon receiving the vehicle speed signal, the control device (3) memorizes the speed of the vehicle when the driver's power (set switch ill) is operated, and at the same time outputs a control signal that compares the memorized speed with the vehicle speed. Accordingly, each part was configured to open and close a throttle knob (51) to control engine output.

However, the conventional constant speed traveling device configured as described above has a drawback that it is difficult to install due to the large number of component parts. In particular, when installing the constant speed traveling device in a completed vehicle, there is a constraint that the set switch 11111 must be installed in a location that is easy for the driver to operate and without damaging the aesthetics.

The present invention solves the above-mentioned drawbacks and provides a constant speed traveling device for a vehicle that eliminates the need for a set switch.

Hereinafter, one embodiment of the present invention will be explained by referring to Fig. 2 (A).

In Figure 2, (61 is a hot wire load that is installed to obscure the driver's visibility when the rear window of the vehicle is fogged, and one side is connected to the power supply terminal.)
7) is a hot wire switch that opens and closes the hot wire load (6),
It is installed in a location that is convenient for the driver. (8) is a judgment circuit, one-shot multivibrator (9),
It consists of a timer and a two-person NAND game (IQI). (9) is a known one-shot multivibrator that is triggered by a pulse in which the input signal changes from an H signal to an L signal; (III is a one-shot multivibrator 19);
A timer that is activated by the output of 1 and generates a pulse for a fixed time, aυ is a two-man NAND gate, and 0 is a judgment circuit (8)
and a control device (3). Fig. 3 is an explanatory diagram of the operation of Fig. 2, in which (a) is a waveform diagram showing the output signal of the hot wire switch (71, fb) is a one-shot A waveform diagram showing the output signal of the multivibrator (91), (C1 is a waveform diagram showing the output signal of the timer (II).

, (d) are waveform diagrams showing output signals of a two-manpower NAND gate.

Next, the present invention will be explained in detail.

The judgment circuit (8) is a circuit that judges whether or not it is a signal to start the constant speed running device when the hot wire switch (7) is opened or closed. When the two doors are opened and closed, a signal is generated to activate the constant speed traveling device. Figure 3 shows the hot wire switch (71
This is an operation time chart when two mouths are opened and closed within a fixed time.The one-shot multivibrator (9) is triggered by the pulse when the operation signal of the hot wire switch (7) changes from an H signal to an L signal. , generates an H signal for a fixed period of time as shown in waveform (6),
The output signal is transmitted to (81) of the ND gate Ql).

Timer (1 (I) is activated by the pulse when the output signal changes from H signal to L signal, generates H signal for T time as shown in waveform (C), and (A) of two-power NAND gate Qυ
tell. Note that timer OI does not respond to the input signal when the output signal of timer 〇〇 is H.

It is configured as follows.

The two-man powered NAND gate (lυ receives the output signal of the one-shot multivibrator (91) and the output signal of the timer, generates an L signal as shown in the waveform fdl, and transmits it to the control device (31). Control device (3) is NAND gate a
Since the constant speed traveling device is configured to be set when the output signal υ becomes L, the constant speed traveling device starts operating at time t1 shown in FIG. In addition, the control device (3),
The actuator (4) and the throttle valve (5) are the first
The same operation as in the configuration diagram shown in FIG. 1 is performed. In other words, by providing the determination circuit (8), the hot wire switch (7)
) can be used as a set switch for a constant speed traveling device.

Note that the hot wire switch 17+ has the effect of preventing fogging of the glass of the hot wire load (61) by being closed for a long time, so even if the hot wire switch (71) is operated intermittently,
It can be considered that there is no influence on the hot wire load (6).

Further, in this embodiment, a hot wire switch is used as one of the electrical appliances installed in the vehicle, but the same configuration can also be achieved using other switches that are safe for running, such as a radio power switch.

As explained above, the present invention has the advantage that it is not necessary to install a set switch of a constant speed running device for a vehicle by using a switch of an electrical equipment installed in a vehicle and installing a simple judgment circuit. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional constant speed traveling device for a vehicle.
FIG. 2 is a block diagram showing a constant speed traveling device for a vehicle according to an embodiment of the present invention, and FIG. 3 is a waveform diagram illustrating the operation of FIG. 2. In the figure (2: is the vehicle speed sensor, (4) is the actuator, (
5) is a throttle valve, +61 is a hot wire load, (7) is a hot wire switch, and (8) is a determination circuit. Agent Makoto Kuzuno

Claims (1)

[Claims] A control device that compares the running speed of the vehicle with a driver's desired speed and controls the engine output of the vehicle to maintain the speed of the vehicle at the desired speed, and a set switch of the control device that controls the vehicle. A constant speed running device for a vehicle, characterized in that it also serves as a switch for other electrical equipment installed in the vehicle.