JPH08165937A - Auxiliary brake control device for vehicle - Google Patents

Abstract

PURPOSE: To ensure safety of a vehicle by preventing the lock of a drive wheel through release of a part or the whole of operation of an auxiliary brake device during the occurrence of abnormality of an antilock brake system. CONSTITUTION: An auxiliary brake control device for a vehicle comprises a device to generate a brake force by closing a passage in an engine exhaust pipe; an auxiliary brake device to increase the brake force of a third brake to generate a brake force through reduction of aid during expansion, and an antilock brake system 24. The anti-brake system abnormality signal output circuit of an anti lock brake controller 6 is connected to an auxiliary brake controller 7, and a circuit means to release a part or a whole of operation of an auxiliary brake device during the occurrence of abnormality of the antilock brake system 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary brake control device for a vehicle, which has a large weight difference between empty space and loaded space.

[0002]

2. Description of the Related Art A vehicle having a large weight difference between empty space and heavy load requires a large braking force when it is loaded. Therefore, in addition to a normal service brake device, a passage in an exhaust pipe of an engine is closed to brake a vehicle. Third, to obtain the force and to reduce the urging force at the time of expansion by releasing the gas compressed near the top dead center of the piston of the engine to obtain the braking force.
Equipped with an auxiliary brake device to increase the engine braking force of the brake as an auxiliary brake.While the weight is light, the wheel may lock when the auxiliary brake device operates, so you do not have to press the brake pedal. An anti-lock brake system (abbreviated as ABS hereinafter) is also used, which operates when the wheels tend to lock and prevents the wheels from locking.

[0003]

In a vehicle equipped with the above ABS, the system is such that the operation of the auxiliary brake device is released when the ABS operating condition is satisfied. Since the auxiliary braking device can operate even if a part or all of the failure occurs, the auxiliary braking device operates even if the deceleration or slip amount of the wheels during vehicle braking exceeds the limit value,
The drive wheel may be locked due to excessive braking.

An object of the present invention is to secure the vehicle stability by releasing a part or all of the operation of the auxiliary brake device to prevent the drive wheels from being locked when the ABS partially or wholly fails. It is to provide an auxiliary brake control device that does.

[0005]

The gist of the present invention for achieving the above object is to obtain a braking force by closing a passage in an exhaust pipe of an engine and near a compression top dead center of a piston of an engine. By releasing the compressed gas, the urging force at the time of expansion is reduced and the braking force is obtained.
An auxiliary braking device for a vehicle, comprising: an auxiliary braking device for increasing the engine braking force of a brake; and an anti-lock braking system that adjusts the braking force of the wheel when the deceleration or slip amount of the wheel exceeds a limit. The anti-lock brake system abnormality signal output circuit of the lock brake controller is connected to the auxiliary brake controller, and circuit means for releasing the operation of the auxiliary brake device when the antilock brake system is abnormal is provided.

[0006]

With the above structure, when the antilock brake system is normal, the auxiliary brake device is released in the antilock brake operating mode, and the auxiliary brake device is operated in the antilock brake non-operating mode.
When the antilock brake system is abnormal, a part or all of the operation of the auxiliary brake device is released.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 23 is an engine, 21 is a transmission, and 2
Reference numeral 9 is an exhaust brake device, 25 is a third brake device, 26 is a muffler, 27 is a propeller shaft, 28 is a solenoid valve for operating a third brake, and the rotational driving force of the input shaft of the transmission 21 is decelerated. The exhaust brake device 29 and the auxiliary brake devices of the third brake device 25 may reduce the rotational drive force of the propeller shaft.

In the control of the auxiliary brake device, the exhaust brake device 29 or the third brake actuating solenoid valve 28 is actuated by a signal from the auxiliary brake controller 7 to perform a predetermined braking action.
FIG. 1 shows a case where the auxiliary brake controller 7 is shared by the exhaust brake device 29 and the third brake actuating solenoid valve 28.

Reference numeral 24 is an anti-lock brake system (abbreviated as ABS hereinafter), which constantly monitors the rotation state of the wheels by means of wheel sensors mounted on the wheels, and when the wheels tend to lock, the anti-lock brake system is provided. An ABS control signal is sent from the controller 6 (hereinafter abbreviated as ABS controller) to the ABS modulator valve 12 to immediately adjust the braking force to prevent wheel lock.

Reference numeral 11 denotes an energizing circuit connected to a power source via a fuse 1. The energizing circuit 11 includes a cut relay 2 connected to an ABS controller 6, a clutch switch 3, an accelerator switch 4, and an auxiliary brake device. The operation switch 5 is arranged in series, and the auxiliary brake device operation switch 5 is connected to the auxiliary brake controller 7.

In the above structure, the present invention provides ABS2
4 is provided with circuit means for releasing a part or all of the operation of the auxiliary brake device in the case of partial or total failure of 4. The specific circuit configuration is the ABS controller 6
The ABS abnormal signal output circuit and the auxiliary brake controller 7 are connected.

The ABS abnormal signal output circuit of the ABS controller 6 is provided with circuit means for releasing a part or all of the operation of the auxiliary brake device when the ABS 24 has a partial or complete failure. Alarm lamp 1
The alarm lamp 10 is used for notification, and the circuit of the alarm lamp 10 can be used. The alarm lamp 10
In addition to the use of the above circuit, it is possible to set a dedicated abnormality signal output circuit.

Therefore, in the above configuration, the ABS 24
When the ABS 24 operates, the cut relay 2 is opened (OFF), and even if the clutch switch 3 and the accelerator switch 4 are turned on, the circuit 11 is cut off by the cut relay 2 so that the auxiliary brake device is activated. Controls the release. When the ABS 24 is deactivated, the cut relay 2 is closed (ON), the circuit 11 is energized, and the clutch switch 3, the accelerator switch 4, and the auxiliary brake device actuation switch 5 are closed (O).
N) controls the operation of the auxiliary braking device and the exhaust braking device 29.

On the other hand, when the ABS 24 outputs an open or close signal from the ABS abnormal signal output circuit, the cut relay 2 is turned on and off in both the ABS operation mode and the non-operation mode. Regardless of this, the auxiliary brake controller 7 judges the signal from the ABS abnormal signal output circuit of the ABS controller 6 to release part or all of the operation of the auxiliary brake device.
When a signal is generated from the ABS abnormal signal output circuit of S24, the lock of the drive wheels by the third brake device 25 and the exhaust brake device 29 is avoided.

[0015]

As described above, according to the present invention, the signal from the ABS abnormal signal output circuit of the ABS controller is judged by the auxiliary brake controller, and the operation of the auxiliary brake device is partially or completely released and controlled. because there is,
When a signal is generated from the ABS abnormal signal output circuit of the ABS, a part or all of the auxiliary brake device is released regardless of the state of the ABS operation mode and the non-operation mode, the lock of the drive wheels is avoided, and the stability of the vehicle is improved. Can be secured.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the device of the present invention.

[Explanation of symbols]

 2 Cut relay 3 Clutch switch 4 Accelerator switch 5 Auxiliary brake device operating switch 6 Anti-lock brake controller 7 Auxiliary brake controller 24 Anti-lock brake system 25 Third brake device 28 Third brake actuating solenoid valve 29 Exhaust brake device

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area F02D 9/06 DE E 29/02 K

Claims (1)

[Claims] 1. An energizing force at the time of expansion is reduced by closing a passage in an exhaust pipe of an engine to obtain a braking force and releasing a gas compressed near a compression top dead center of a piston of an engine. Vehicle provided with an auxiliary braking device for increasing engine braking force of the third brake for obtaining braking force, and an anti-lock braking system for adjusting braking force of the wheel when the deceleration or slip amount of the wheel exceeds a limit value In the auxiliary brake device, the anti-lock brake system abnormality signal output circuit of the anti-lock brake controller and the auxiliary brake controller are connected, and means for releasing the operation of the auxiliary brake device when the anti-lock brake system is abnormal is provided. Characteristic vehicle auxiliary brake control device.