JP2558937Y2 - Vehicle auto-brake device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic brake device for a vehicle having an exhaust brake operating circuit in which a clutch switch, an exhaust brake switch, an accelerator switch, and an exhaust brake relay coil are connected in series.

[0002]

2. Description of the Related Art A rear-end collision warning device is known to prevent a rear-end collision of a vehicle. For example, the present applicant 2-71
No. 58 is disclosed.

[0003]

However, it is dangerous if the brake is suddenly applied according to the signal of the rear-end collision warning device. Therefore, for example, when the braking operation is performed by the exhaust brake which is the auxiliary brake, the fuel injection is not stopped. Therefore, there is a problem that the pressure in the exhaust pipe becomes high and the exhaust brake valve is damaged.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a safe and durable vehicle auto-braking device capable of automatically operating an exhaust brake in response to a signal from a rear-collision warning device to prevent a rear-end collision.

[0005]

According to the present invention, a rear-end collision of a vehicle having an exhaust brake operating circuit in which a clutch switch, an exhaust brake switch, an accelerator switch, and an exhaust brake relay coil are connected in series is provided. A relay that is activated by an alarm signal from an alarm device is provided, and an operation circuit of the relay opens and closes a solenoid valve that operates an accelerator trap and another relay that opens and closes a relay contact of another exhaust relay connected in parallel to the exhaust brake switch. The rear-end collision warning device is connected to the coil of the exhaust relay and does not emit a warning signal when the accelerator opening signal changes rapidly.

Further, according to the present invention, a relay for activating an alarm signal from a rear-end collision alarm is provided in the brake circuit of the automatic cruise circuit, and the automatic cruise is temporarily released by an exhaust operation.

[0007]

In the automatic brake device constructed as described above, the accelerator pedal returns by the alarm signal from the rear-end collision prevention device, and the exhaust brake is operated, so that the exhaust brake valve is not damaged. Also, if the accelerator is suddenly depressed, the exhaust brake does not operate, so it is safe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a portion belonging to the prior art will be described first. The contact 1a of the clutch switch 1 is connected to a positive power source, and the first contact is provided by an electric circuit L1.
Is connected to the contact 3a of the relay R1. Also, the first
The contact 3b of the relay R1 is connected to an exhaust brake valve driving device 7 by an electric circuit L2, and is connected to the pilot lamp 6 by an electric circuit L3. The contact 1b of the clutch switch 1 is connected to the contact 2a of the exhaust brake switch 2 by an electric circuit L7. Another contact 2b of the switch 2 is connected to the contact 8a of the accelerator switch 8 by the electric circuit L6 via the relay coil 3 of the relay R1 by the electric circuit L8.
b is connected to the CPU 9 of the exhaust brake.

Therefore, the exhaust brake is operated by turning on the manual exhaust brake switch 2 and releasing the accelerator switch 8 from the accelerator pedal while the clutch switch 1 is ON (the clutch pedal is not depressed). When the accelerator pedal is returned and the returned signal switch is turned on, the fuel system is also cut at the same time, the exhaust gas pressure is reduced, the relay R1 is turned on, and the exhaust valve driving device 7 is energized to operate the exhaust brake. Here, since the foot is away from the accelerator pedal, the inside of the exhaust pipe does not become high pressure, and if the clutch pedal is depressed before the vehicle stops, the clutch switch 1 is turned off, so that the exhaust brake is released and the engine is released. Will not stop. The above belongs to the prior art.

In the present invention, the contact 5a of the second relay R2, which is another relay connected in parallel with the exhaust brake switch 2, is connected to the contact 2a, and the contact 5b is connected to the contact 2b. The relay coil 5 of the second relay R2 is connected to the relay 12 by an electric circuit L4, and the other end of the coil 5 is grounded. Also,
The air of the air source 15 is connected to the accelerator trap 13 via the air magnetic valve 14 in the air circuits A1 and A2. Further, the air magnetic valve 14
Is connected to the relay 12 by an electric circuit L5.

In FIG. 2, an accelerator pedal 22 is pivotally mounted on a bracket 21 provided on a floor 20 of the cab, and is connected to a fuel control rack of an injection pump (not shown) by a rod 29 via a bell crank 27, for example. . An accelerator trap 13 is fixed to the floor 20, and a piston 25 and a rod 24 are slidably attached to the accelerator trap 13.
Reference numeral 28 denotes a return spring, and reference numeral 30 denotes a return spring of a piston in the accelerator trap.

In FIG. 1 and FIG.
1 indicates a sudden change in the accelerator opening (for example, 35 mm /
sec), the transmission of the secondary warning signal 11a, which is a rear-end collision warning, is stopped by the signal from the accelerator opening sensor 10, and if there is no signal from the accelerator opening sensor 10, a signal is sent to the relay 12 to activate the air magnetic valve 14. It is configured to open to send air to the accelerator trap 13 and to turn on the second relay R2.

Therefore, if the driver approaches the vehicle in front while stepping on the accelerator, for example, falling asleep or vague, the signal from the rear-end collision warning device 11 activates the relay 12 to supply electric current to the electric circuit L5, thereby causing air magnetic. Valve 1
4 is opened, air enters the hose A in FIG. 2, the piston 25 is pushed, the rod 24 of the accelerator trap 13 pushes back the accelerator pedal 22 from B to C, and the second relay R2 is turned on to excite the air. Activate the zote brake. Further, when the accelerator is suddenly depressed, the signal output to the alarm output circuit 12 of the alarm signal device is stopped, so that the exhaust brake does not operate, so that the exhaust brake does not operate. Therefore, when the vehicle accelerates and avoids the preceding vehicle and changes direction, the brake does not work.

FIG. 4 shows another embodiment equipped with an auto cruise. The relay 12 that has received the signal from the rear-end collision warning device 11 activates the exhaust brake in the same manner as the example of FIG. This is an example in which the exhaust brake is released to operate. When the signal from the rear-end collision warning device disappears, the auto cruise is restored.

[0016]

[Effects of the Invention] Since the present invention is configured as described above, it is possible to prevent rear-end collision even if the driver falls asleep or is vague, and is safe. If the accelerator suddenly changes, the exhaust brake does not operate, so that the brake valve is not damaged. Also, since the accelerator is forcibly returned, the driver can be alerted.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an accelerator and an accelerator trap of FIG. 1;

FIG. 3 is a block diagram showing a determination circuit of the rear-end collision warning device.

FIG. 4 is a diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Clutch switch 2 ... Exhaust brake switch 3, 5 ... Relay coil 6 ... Pilot lamp 7 ... Exhaust brake drive device 8 ... Accelerator switch 10 ... Accelerator opening switch 11 ... Rear-end collision alarm device 12 ... Relay 13 ... Accelerator trap 14 ... Air magnet valve 22 ... Accelerator pedal 30 ... Auto cruise CPU R1 ... First relay R2 ... Second relay L1-L8 ... Electric circuit

Claims (2)

(57) [Scope of request for utility model registration] 1. An auto-brake device for a vehicle having an exhaust brake operation circuit in which a clutch switch, an exhaust brake switch, an accelerator switch, and an exhaust brake relay coil are connected in series, a relay activated by an alarm signal from a rear-end collision alarm device. The operation circuit of the relay is connected to a solenoid valve that operates an accelerator trap, and a coil of another exhaust relay that opens and closes a relay contact of another exhaust relay connected in parallel with the exhaust brake switch, The rear-end collision warning device does not emit a warning signal when the accelerator opening signal changes abruptly. 2. A brake circuit for an auto cruise circuit,
2. The vehicle autobrake device according to claim 1, further comprising a relay for activating a warning signal from a rear-end collision warning, wherein the automatic cruise is temporarily released by an exhaust operation.