JPS58112847A - Drive control device for car - Google Patents

Abstract

PURPOSE:To maintain a safe drive for a car by providing a differential amplifier for warning a danger with a signal. CONSTITUTION:When a distance signal 1 and a car speed signal 2 come to obtain a fixed relation, a differential amplifier 3 is operated to generate a danger signal. When the differential amplifier 3 works, transistors T1 and T2 are switched on to operate a brake servo-circuit 4 for operating a brake. At the same time, an excitation coil RE1 is connected to close a reed contact S1. Thereby, transistors T3 and T4 are switched off to operate an accelerator servo-circuit 5, and a monitor lamp L1 is lit to inform of the release of an accelerator. This construction permits to release the accelerator by obtaining the danger signal regardless of the position of the accelerator pedal, in other words, the output of a potentiometer VR.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle travel control device C that automatically controls a vehicle travel device in accordance with driving conditions.

Conventional devices of this type are configured to detect the distance to an obstacle in front and the vehicle speed and apply the brakes to stop the vehicle.

However, if the accelerator is simply depressed to actuate the brakes, this places a burden on the brake system.

Furthermore, if an oncoming vehicle approaches, for example, the vehicle will have no place to escape and will be in danger. Furthermore, if the obstacle in front of the vehicle has already moved or there is a need to accelerate, it is unreasonable to be unable to accelerate the vehicle immediately, which impedes smooth traffic flow.

This invention was made by focusing on the conventional problem C; when the vehicle is running, dangerous information is detected based on the distance to an obstacle in front of the seat and the vehicle speed, and the brakes are actuated accordingly. It is also an object of the present invention to provide a vehicle cruising control device which immediately releases the brake and operates the accelerator when it becomes necessary to accelerate after the operation.

Hereinafter, this invention will be explained based on drawing C: FIG.

FIG. 1 shows an embodiment of the first invention.

First, the configuration will be explained. In the figure, reference numeral 1 is a distance signal circuit, and 2 is a vehicle speed signal circuit. This distance signal circuit 1 converts the distance to an obstacle ahead into an electrical signal, and constitutes a distance measuring device using, for example, a laser beam. Further, the vehicle speed signal circuit 2 converts, for example, a tachometer display into an electrical signal. The respective output sides of the distance signal circuit 1 and the vehicle speed signal circuit 2 are connected to a differential amplifier 3, and this differential amplifier 3 is connected to the base of a transistor T1 via a resistor R1. Together with T2, it constitutes a Darlington circuit, and the collector of the transistor T1 is connected to the brake servo circuit 4.

This brake servo circuit 4 is connected to, for example, a servo motor, a servo pulp, etc., and these are connected to a brake (not shown).

Further, the emitter of the transistor T2 is connected to one end of the excitation coil RK1 of the first reed relay, and the other end of the excitation coil R& is grounded. This excitation coil RE1 is interlocked with the grounded reed contact s1, and this reed contact S
1 is connected to the transistor pace C2 via a backflow prevention diode D1, and a monitor lamp L1.
It is connected to the B9 input wire which is connected to battery B via. The transistor TM together with the transistor T4 constitutes a Nidarlington circuit, and the terminal of this transistor T4 is grounded, and its collector is connected to the accelerator servo circuit 5.
Although not shown in the figure, for example, there are two series of servo pulps C that can control the current, the negative pressure of the intake manifold is controlled by opening and closing these servo pulps, and the actuator is actuated by the negative pressure of It is configured to control and drive an accelerator wire that opens and closes the throttle pulp.

The accelerator servo circuit 5 has two B lines &, -, which are grounded and connected to a potentiometer (C) which is linked to an accelerator pedal (not shown), and the output end of this potentiometer (■) is connected to a resistor R2. The base C of the transistor Ts is connected through the two.

Next, the operation of the first invention will be explained.

For example, when a running vehicle approaches a preceding vehicle as an obstacle ahead, a distance signal and a vehicle speed signal are obtained corresponding to the inter-vehicle distance to the preceding vehicle and the vehicle speed of the vehicle.

Then, when both signals reach a predetermined relationship, the differential amplifier 3 is activated to generate a danger signal. Therefore, even if the inter-vehicle distance is short, this danger signal will not be generated if the vehicle speed is below a predetermined speed, and will only be generated when information is obtained that will impede safe driving of the vehicle.

When the differential amplifier 3 operates, the transistors T1e and T2 turn on, operating the brake servo circuit 4 and applying the brakes. Simultaneously (the double excitation coil RE1 is energized and closes the lead contact S1. This causes the transistor Ts # T4
is turned off and the accelerator servo circuit 5 operates and the monitor lamp h
lights up to notify you that the accelerator has been released. In this way, the danger signal is obtained (2) The accelerator is released regardless of the position of the accelerator pedal, in other words, the output of the potentiometer (2).

Note that in a so-called engine brake state, the accelerator is released, but in this case the output of the potentiometer (2) becomes zero, which is the same as when the transistors Ts and T4 are turned off and the accelerator servo circuit 5 is activated.

Next, FIG. 2 shows an embodiment of the second invention.

This second invention is obtained by adding a first reset circuit to the first invention. It should be noted that the same configuration as the first invention (the same reference numerals are used for the two parts, and redundant explanation will be omitted).

To explain the configuration of the first reset circuit, the excitation coil RE1 of the first reed relay is connected in series C; the excitation coil RE2 of the second reed relay is connected, and these excitation coils RE1*
The connection point of RE2 (: is connected to the resistor RA, one end of this resistor is connected to the output end of the AND circuit AND, and the output end (2 is connected to one input end of the OR circuit OR. Further, one input terminal of the AND circuit AND is connected to the output terminal of the OR circuit OR, and the other input terminal of the AND circuit AND is connected to the output terminal of the potentiometer ① via the relay contact 8i. In addition, one end of the capacitor C1 is connected to the output terminal C of the potentiometer meter, and the other end of this capacitor C1 is grounded via a resistance, and the other input terminal of the OR circuit OR. It is connected to the.

One end of the excitation coil REs of the relay that activates the contact S5 is connected to the B line BL, and the other end is grounded via the lead contact S2 of the second relay.

Furthermore, C2, B line BLl= is the monitor lamp L2.
'The collector of the transistor T5 is connected, the emitter of this transistor T5 is grounded, and its pace is connected to the output f4 of the AND circuit AND through the resistor R4.
(Two connections are made. Note that a diode D2 for preventing backflow is connected between the collectors of the transistors 1 and 5 and the pace of the transistor T1.

Next, the second invention will be explained in detail.

A case will be explained in which a vehicle approaches a preceding vehicle at a predetermined speed, but wants to accelerate to avoid danger, for example.

In this case, since the transistors T+ and T2 are on, the excitation coil RE2 of the second reed relay is energized and the reed contact S2 is closed.

Therefore, the excitation coil REi of the relay is energized and the contact S
s is closed, and the output of the potentiometer ■ is connected to the AND circuit AN.
It is now supplied to the other input terminal of D1 and to capacitor C1. If the accelerator pedal is suddenly depressed in such a state, the output of the potentiometer (■) exceeds a predetermined value, and the other input terminal of the AND circuit AND1 becomes a no-repel state, and the output of the differential circuit formed by the capacitor C1 and g and Re also reaches the predetermined value. When the value is exceeded, the other input terminal of the OR circuit OR becomes a no-repel. Therefore, the output terminal of the OR circuit OR is 7
The output of the AND circuit ANIh becomes the 1 level. The output of this AND circuit AND1 is 112
Since the feedback is sent to the excitation coil RE2 of the reed relay and one input terminal of the OR circuit OR, unless the output of the potentiometer ■ becomes zero-phase, that is, the amount of depression of the accelerator pedal becomes almost zero, the AND circuit AND1 The 71-element at the output end of is held. When the output terminal of the AND circuit ANDI becomes /SS, the transistor T5 is turned on and the pace of the transistor T1 becomes zero potential, so the brake servo circuit 4 is released and the brake operation is prevented. Therefore, the energization of the excitation coil RE1 of the first J-driving relay is stopped, the lead contact S1 is opened, the transistor Tie T4 is turned on, and the accelerator servo circuit 5 is activated to perform accelerator acceleration. When the transistor Ts is turned on, the monitor lamp L2 lights up to notify that the brake servo circuit 4 has been released, while the lead contact S1 is opened and the monitor lamp L goes out to notify that the accelerator servo circuit 5 has been released.

Note that the first reset circuit is reset by releasing the accelerator pedal and setting the input terminal of the AND circuit ANIlh to a low level.

Next I: Figure 3 shows an embodiment of the third invention. This third invention is the first invention or the second invention (: adding a second reset circuit.

Note that the same reference numerals are used for structures similar to those of the first invention or the second invention, and redundant explanation will be omitted.

To explain the configuration of the second reset circuit, the AND circuit AN
The anode of the diode Ds is connected to the output terminal of the diode D1, and its cathode is connected to the connection point of the resistor R1 and the resistor R4. The output terminal C of the circuit AND2 is connected. One input terminal of the AND circuit AND2 is connected to the voltage dividing resistor Rs l R6.
One end of this resistor Rs is connected to the B line BL via the turn signal switch armor.
One end of resistor R6 is grounded. Further, one end of the resistor Rs is connected to a grounded turn signal lamp LM. Furthermore, an overspeed detection circuit 6 is connected to the other input terminal of the -AND circuit AND2, and this overspeed detection circuit 6 is supplied with the output of the vehicle speed signal circuit 2 and is activated when the vehicle speed exceeds a predetermined value. It is configured to do this.

Next, the third invention will be explained in detail.

A case in which a vehicle approaches a preceding vehicle at a predetermined speed, but attempts to overtake by changing lanes while maintaining the vehicle speed due to the deceleration of the preceding vehicle, will be explained in detail. In such a case, as the vehicle approaches the preceding vehicle, the rebrake servo circuit 4 should be activated as described above to apply the brakes. However, if the turn signal switch is turned on without changing the position of the accelerator pedal, the turn signal lamp Ls lights up, one input terminal of the AND circuit AND2 becomes high level, and the other input terminal becomes the overspeed detection circuit 6. When receiving the output of , the output terminal of the AND circuit AND2 becomes )・Irepel. Therefore, the transistor T5 is turned on, and the transistors T1e and T2 are turned on, thereby releasing the brake servo circuit 4 and preventing the brake from operating. In this case, since the contact S1 is open, the accelerator servo circuit 5 does not operate and accelerator acceleration is performed.

Note that even if the turn signal switch history is turned on, the overspeed detection circuit 6 will not operate unless the vehicle speed exceeds a predetermined value, so the second reset circuit will not operate when the vehicle is decelerating at an intersection or the like.

Note 1. The turn signal switch may be a separately provided switch, as long as it can provide an overtaking signal indicating a lane change.

As explained above, according to the first invention C2, there is a brake servo circuit that operates the brakes based on a danger signal obtained from the distance to an obstacle in front and the vehicle speed, and when the brake servo circuit is activated, the accelerator is activated. Since the vehicle is equipped with an accelerator servo circuit for stopping the vehicle, the accelerator can be released immediately after the brake is activated when the vehicle approaches an obstacle in front of the vehicle, thereby eliminating the burden during play.

Further, according to the second invention, there is provided a brake servo circuit that attempts to stop the operation during play based on the danger signal 12 obtained from the distance to the front obstacle and the vehicle speed, and when the brake servo circuit is activated 6: Accelerator. The first reset circuit is equipped with an accelerator servo circuit for stopping the operation of the accelerator servo circuit and a first reset circuit for stopping the operation of the accelerator servo circuit and the brake servo circuit when the change in accelerator depression speed exceeds a predetermined value. In addition to the effect of Noya Akira, the detection of a danger signal allows the player to rapidly depress the accelerator to avoid danger even when the player is in operation. This effect can be obtained.

Furthermore, according to a third invention, there is provided a brake servo circuit that operates the brakes based on a danger signal obtained from the distance to a front obstacle and the vehicle speed, and a brake servo circuit that attempts to stop accelerator operation when the brake servo circuit is activated. Since it includes an accelerator servo circuit and a second reset circuit that stops the operation of the brake servo circuit and the accelerator servo circuit when an overtaking signal is input at a predetermined vehicle speed or a predetermined accelerator depression amount, the effect of the first invention can be achieved. In addition, even if you want to overtake a preceding vehicle without changing your vehicle speed, you can accelerate without applying the brakes.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram showing an embodiment of the first invention, Fig. 2 is an electric circuit diagram showing an embodiment of the second invention, and Fig. 3 is an electric circuit diagram showing an embodiment of the third invention. It is. 1...Distance signal circuit, 2...Vehicle speed signal circuit, 3...
・Differential amplifier, 4... Brake servo circuit, 5...
Accelerator servo circuit, 6... overspeed detection circuit. Applicant Nissan Shatai Co., Ltd.

Claims (3)

[Claims] (1) Equipped with a brake servo circuit that operates the brakes based on danger signals obtained from the distance to obstacles ahead and vehicle speed, and an accelerator servo circuit that attempts to stop the operation of the nearest accelerator when the brake servo circuit is activated. A vehicle travel control device characterized by: (2) A brake servo circuit that attempts to stop the operation of the brakes based on a danger signal obtained from the distance to an obstacle ahead and the vehicle speed, and an accelerator servo circuit that attempts to stop the operation of the accelerator when the brake servo circuit is activated. A driving control device for a vehicle, characterized in that it comprises a circuit for stopping each operation of the accelerator servo circuit and the brake servo circuit when a change in the depression speed of the accelerator exceeds a predetermined set value. . (3) A brake servo circuit that operates the brakes based on a danger signal obtained from the distance to an obstacle in front and the vehicle speed, and an accelerator servo circuit that attempts to stop accelerator operation when the Mukuro brake servo circuit is activated. A vehicle running control device comprising: a second reset circuit that stops the operation of the brake servo circuit and the accelerator servo circuit when an overtaking signal is emitted at a predetermined vehicle speed or a predetermined accelerator pedal depression amount. .