JP2910495B2 - Brake force control device for vehicle with anti-skid brake device and retarder 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 anti-skid brake device and a braking force control device for a vehicle having a retarder device.

[0002]

2. Description of the Related Art When a vehicle travels on a long downhill,
He uses a lot of foot brakes to keep the running speed constant. However, if the foot brake is frequently used continuously, the braking force of the brake decreases. In such a case, the vehicle speed is reduced by using an engine brake or a retarder device as a means other than the foot brake.

[0003] Here, the engine brake is to apply a load to the engine by lowering the shift speed and to suppress the rotation of the drive wheels, and the retarder device controls the vehicle by operating an operation lever. It provides power and is often provided behind the transmission. The retarder includes an electric type and a fluid type.

In this retarder device, a relatively large braking force is generated at the time of the ON operation, and when the ON operation is performed particularly at a place where the frictional force on the road surface is low, the frictional force of the tire on the road surface is added to this force. Wheels may lock up due to inability to catch up. An anti-skid brake device (ABS) that operates by stepping on a foot brake and controls a braking force so as not to lock the wheels is provided as a device provided for effective control when the wheels are locked.

Conventionally, when the ABS is activated by depressing the foot brake, the retarder device is not operated.

[0006]

However, in such a conventional technique, when the wheel of the retarder device is turned on by turning on the switch of the retarder device in a place where the frictional force on the road surface is low, the driver cannot use the foot. Since the anti-skid brake device is operated after the brake is depressed, there is a problem that the time during which the wheels are locked becomes long.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above circumstances. When a retarder device operates and wheels are locked, an anti-skid brake device can be automatically operated. An object of the present invention is to provide a brake force control device for a vehicle with a skid brake device and a retarder device.

[0008]

SUMMARY OF THE INVENTION Therefore, a braking force control device for a vehicle with an anti-skid brake device and a retarder device according to the present invention has a wheel speed detecting means for detecting a wheel speed and a wheel speed detecting means for detecting the wheel speed. Wheel lock state detecting means for detecting a locked state of the wheel from the wheel speed information obtained, and a service for canceling the locked state when the wheel locked state is detected by the wheel locked state detecting means. <br/> Want to provide an anti-skid brake device having braking force control means for controlling the vehicle, and a retarder that is interposed between the engine and the drive wheels and acts as a load during operation to decelerate the vehicle, and to operate the retarder And an operation lever operated when it is desired to stop the operation of the retarder, and an operation lever of the retarder according to an operation state of the operation lever. In a vehicle equipped with the retarder device and a retarder control unit for controlling the state, the retarder
And control the operation of the anti-skid brake device
Retarder anti-skid brake system when the wheels are locked
Control means, when the wheel is locked, retarder anti-ski
When the locked state or the pseudo-locked state of the wheel is detected , the brake control means controls the retarder so as to reduce the braking force by the retarder,
The service brake regardless of the presence or absence of a foot brake operation
The present invention is characterized in that the anti-skid brake device is operated so that a key force is generated .

[0009]

In the above-described brake force control device for a vehicle with an anti-skid brake device and a retarder device according to the present invention, a wheel lock state or a pseudo lock state is detected by operating the retarder of the retarder device. The retarder / anti-skid brake control means controls the retarder so as to reduce the braking force by the retarder, and generates a service brake force regardless of whether a foot brake is operated. <br/> An anti-skid brake device Operates to secure braking power
While releasing the lock state.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. (A) Description of First Embodiment FIGS. 1 to 4 show a brake force control device for a vehicle with an anti-skid brake device and a retarder device according to a first embodiment of the present invention. FIG. FIG. 2 is an overall configuration diagram showing a brake piping system and a control system of a vehicle having the present apparatus, FIG. 3 is a flowchart for explaining the operation of the present apparatus, and FIG. 6 is a time chart for explaining the operation.

When the vehicle is to be decelerated or travels while suppressing acceleration on a long downhill, a foot brake and an engine brake or a retarder device for assisting the brake are used as deceleration means. In this embodiment, as shown in FIG. 2, the vehicle is equipped with the retarder device and the anti-skid brake device to control the braking force.

Here, the retarder device in FIG. 2 includes a retarder 7, an operation lever 8, and a retarder control unit 10. The anti-skid brake device includes a wheel speed sensor (wheel speed detecting means) 1-1 to 1-4, a foot brake switch 21 and
It has a BS control unit 4 and has control valves 11-1 to 11-4 in the brake piping system.
, Actuator 12, dual brake valve 13, relay valve 14, and brake chambers 15-1 to 15-
4, quick release valve 16 and air tank 17-
1, 17-2.

The retarder 7 is interposed between the engine 5 and the drive wheels 6 and acts as a load during operation to decelerate the vehicle. The operating lever 8 is used when the retarder 7 is to be operated or when the retarder 7 is operated. ON when you want to stop operation
/ OFF operation. The retarder control unit 10 controls the operation state of the retarder 7 according to the operation state of the operation lever 8.

The wheel speed sensors 1-1 to 1-4 are mounted on wheels 20 and 6, respectively, and are attached to rotors 18-1 to 18-.
4, the wheel speed sensor 1-1 detects the wheel speed of the right front wheel.
The wheel speed sensor 1-2 detects the wheel speed of the front left wheel, the wheel speed sensor 1-3 detects the wheel speed of the rear right wheel, and the wheel speed sensor 1-4 detects the wheel speed of the rear left wheel. Therefore, these four sensors 1-1 to 1-4 constitute the wheel speed detecting means 1.

The foot brake switch 21 detects that the driver steps on the foot brake and outputs a signal to the ABS control unit 4 to that effect. The ABS control unit 4 basically detects a wheel lock state based on the wheel speed information from the wheel speed sensors 1-1 to 1-4 and the braking operation information by the foot brake from the foot brake switch 21. ,
The brake force is controlled so as to release this locked state.
Control unit 4, when the wheel during operation of the retarder 7 becomes locked or pseudo locked state, regardless of the foot brake on / off, automatically Sir
Activate the anti-skid brake device to generate the screw brake force , control the brake force to release the above-mentioned locked state, and obtain sufficient braking force.
It is made as to that.

Here, the locked state of the wheels refers to a state in which the rotation of the wheels is completely stopped even though the vehicle is moving, and the pseudo locked state of the wheels refers to the speed of the vehicle and the wheel speed. Is a state in which the rotational speeds of the two are significantly different. When the wheels are locked or pseudo-locked when the retarder 7 is actuated, AB
Under the control of the S control unit 4, air is sent from the air tanks 17-1 and 17-2 by opening the air lines leading to the brake chambers 15-1 to 15-4 provided for each wheel. To generate a braking force, and the dual brake valve 1
3 receives the pedaling force from the foot brake,
Like the actuator 12, the air line is opened to generate a braking force, and the line is divided into two systems by a front wheel that is the driven wheel 20 and a rear wheel that is the driving wheel 6.
Different braking forces are used to balance the behavior of the vehicle during braking.

The relay valve 14, the quick release valve 16, and the control valves 11-1 to 11-4 disposed on the front, rear, left and right wheels are provided with an air tank 17-.
The air pressure between the brake chambers 1 and 17-2 and the brake chambers 15-1 to 15-4 is controlled by opening and closing valves, and the braking force obtained by the air pressure is controlled. In addition, 1
9 is a differential.

FIG. 1 shows a control system of the retarder device and the anti-skid brake device. In FIG. 1, the wheel speed sensors 1-1 to 1-4,
Foot brake switch 21, operation lever 8, engine 5, drive wheel 6, control valves 11-1 to 11-
4, and the actuator 12 are the same as those shown in FIG.

First, as shown in FIG. 1, the ABS control unit 4 includes a wheel lock state detecting means 2 and a braking force control means 3. Here, the wheel lock state detection means 2 detects a wheel lock state (hereinafter, the lock state includes a pseudo lock state) from the wheel speed information detected by the wheel speed detection means 1. is there. And the braking force control means 3
Basically, when the braking operation by the foot brake is detected by the foot brake switch 21 and the locked state of the wheel is detected by the wheel locked state detecting means 2, the braking force is controlled so as to cancel the locked state. If the wheels are locked when the retarder 7 is actuated, the retarder control means 9 provided in the retarder control unit 10 controls the wheel lock retarder / anti-skid brake control means (lock retarder).・ Anti-skid brake control means) 9A operates,
By receiving the information from the retarder / anti-skid brake control means 9A when the wheels are locked, the service brake is automatically performed regardless of the on / off state of the foot brake.
Also functions as a rk force actuates the anti-skid brake system to produce.

The retarder control unit 10 has a function of retarder control means 9 for controlling the operation state of the retarder 7 in accordance with the operation state of the operation lever 8, and this retarder control means 9 operates the retarder 7 When the locked state of the wheel is detected by the wheel lock state detecting means 2, the wheel lock state retarder / anti-skid brake control means 9 </ b> A for controlling the retarder 7 so as to reduce the braking force by the retarder 7. It also has functions. In this case, the anti-skid brake is automatically activated as described above.

Next, the operation of the anti-skid brake device and the braking force control device of the vehicle with the retarder device will be described with reference to the flowchart of FIG. 3 and the time chart of FIG. First, in step S1 in FIG.
The retarder 7 is activated by the operation of the operation lever 8 by the driver (see time (a) in FIG. 4A). Then, in step S2, the wheel speed is reduced by applying a braking force to the vehicle (see FIG. 4B).

Thereafter, in step S3, the retarder control means 9 of the retarder control unit 10 determines whether or not the retarder 7 has been stopped by operating the operation lever 8. Here, if the retarder 7 is not stopped,
In step S4, whether the drive wheel 6 is locked or not is determined by the detection signal from the wheel lock state detection means 2 to determine whether the wheel is locked or not.
A decides.

If the driving wheels 6 are not locked, the control of the retarder 7 by the retarder control means 9 is continued in step S2. However, if the drive wheel 6 is locked (see FIG. 4B), in step S5, the wheel-locking retarder / anti-skid brake control means 9A determines the amount by which the braking force by the retarder 7 is reduced. calculate.

In step S5, the amount by which the braking force by the retarder 7 is reduced is calculated. In step S6, based on this calculation, the retarder 7 is controlled by the control signal of the wheel locked retarder / anti-skid brake control means 9A.
(See FIG. 4A). Next, in step S7, the service braking force is controlled. That is, the actuator 1 is controlled by the braking force control means 3 in the ABS control unit 4.
By operating the brake pedal 2, the brake state is artificially created, and the braking force is controlled so that the locked state is automatically released (see FIGS. 4B and 4C).

As shown by (A) in FIG. 4, the braking force corresponding to the reduction of the braking force of the retarder 7 is supplemented by the service braking force operated under the control of the braking force control means 3. Thereafter, step S3 is performed again.
It is determined whether the retarder 7 has been stopped by the operation lever 8. Here, if the operation lever 8 has been operated to stop the operation of the retarder 7, step S8
Then, the control of the retarder 7 by the retarder control means 9 is stopped, and the control of the braking force by the brake force control means 3 is also stopped in step S9.

Therefore, in the first embodiment, the retarder 7
When the wheels are locked due to the operation of the vehicle, the service brake force is automatically generated and the anti-skid brake device can be operated, so that the deceleration by the retarder 7 in a place where the road surface has low frictional force However, there is an advantage that the operation can be performed with a stable behavior and the time during which the wheels are locked can be reduced.

(B) Description of Second Embodiment Next, a second embodiment of the present invention will be described. In this embodiment, as in the first embodiment, the retarder device and the anti-skid brake device are mounted on a vehicle as shown in FIG. 2 to control the braking force. That is, as shown in FIG. 2, the vehicle-mounted retarder device includes a retarder 7 and an operation lever 8 similar to those in the first embodiment, and the operation of the retarder control unit 10 is similar to that of the first embodiment. Is controlled.

The anti-skid brake device has the same wheel speed sensors 1-1 to 1-4 and a foot brake switch 21 as those of the first embodiment. -1 to 11-4
, Actuator 12, dual brake valve 13, relay valve 14, and brake chambers 15-1 to 15-
4, quick release valve 16 and air tank 17-
1 and 17-2 are provided, and the operation of the anti-skid brake device is controlled by the ABS control unit 4.

Here, the retarder control unit 10 in the retarder device has a retarder control means 9 for controlling the operation state of the retarder 7 according to the operation state of the operation lever 8. When the ABS control unit 4 detects the locked state of the wheel based on the wheel speed information from the wheel speed sensors 1-1 to 1-4 and the braking operation information by the foot brake from the foot brake switch 21, The brake force is controlled so as to release the locked state.

Further, under the control of the retarder control unit 10 and the ABS control unit 4, when the wheels are locked when the retarder 7 is operated, the braking force by the retarder 7 is reduced, and the foot brake is turned on / off. independently, automatically activates the anti-skid brake system as the service brake force is generated and, releasing Shinano the locked state of the above
The braking force reduced by the operation control of the retarder 7
I am trying to make up for it.

FIG. 5 is a control block diagram of a brake force control device for a vehicle with an anti-skid brake device and a retarder device according to a second embodiment of the present invention for performing the above control. In FIG. 5, the wheel speed sensor 1-1
1-4, foot brake switch 21, operating lever 8, engine 5, drive wheel 6, control valve 11-
1 to 11-4 and the actuator 12 are the same as those shown in FIG.

The ABS control unit 4
In order to exhibit the above-mentioned functions, the vehicle includes a wheel lock state detecting means 2 and a braking force control means 3. here,
The wheel lock state detecting means 2 detects a wheel lock state from the wheel speed information detected by the wheel speed detecting means 1. Basically, when the brake operation by the foot brake is detected by the foot brake switch 21 and the locked state of the wheel is detected by the wheel lock state detecting means 2, the brake force control means 3 cancels the locked state. The braking force is controlled so as to perform the braking operation.

Further, when the wheels are locked when the retarder 7 is actuated, the braking force control means 3
If the wheels are locked when the retarder 7 is actuated, the braking force by the retarder 7 is reduced, and a signal to automatically activate the anti-skid brake device irrespective of on / off of the foot brake is issued. It has a function of a retarder / anti-skid brake control means 3A when the wheels are locked.

The retarder control unit 10 has a function of a retarder control means 9 for controlling the operation state of the retarder 7 in accordance with the operation state of the operation lever 8, and the retarder control means 9 includes a retarder for locking the wheel. When receiving a control signal from the anti-skid brake control means 3A, the retarder 7 is controlled so as to reduce the braking force by the retarder 7.

From the above description, in the second embodiment, the wheel lock-time retarder / anti-skid brake control means is provided not in the retarder control means 9 but in the brake force control means 3 described above. It can be seen that this is different from the embodiment. Therefore, the operation of the braking force control device according to the second embodiment is as follows. That is, when the wheels are locked when the retarder 7 is actuated, the retarder control unit 10 uses the retarder 7 based on the control signal from the wheel lock retarder / anti-skid brake control means 3A in the braking force control means 3. In addition to reducing the braking force, the ABS control unit 4 controls the braking force control means 3 when the wheel is locked, the retarder / anti-skid brake control means 3A.
Based on a control signal from, regardless of the on / off foot brake, is operated automatically antiskid brake system, while releasing the locked state of the above retarder
The brake force reduced by the operation control of step 7 is compensated for.

The other parts operate in the same manner as in the first embodiment. Therefore, also in the case of the second embodiment, when the wheels are locked due to the operation of the retarder 7, the service braking force is automatically generated as in the case of the first embodiment, and Since the anti-skid brake device can be operated, there is an advantage that deceleration by the retarder 7 in a place where the frictional force on the road surface is low can be performed with a stable behavior, and the time during which the wheels are locked can be reduced.

(C) Description of Third Embodiment Next, a third embodiment of the present invention will be described. In this embodiment, basically, similarly to the first and second embodiments, the vehicle shown in FIG. 6 is equipped with the retarder device and the anti-skid brake device to control the braking force. It has become.

That is, as shown in FIG. 6, the retarder device mounted on the vehicle includes a retarder 7 and an operation lever 8 as in the first and second embodiments. Operation is retarder control unit 1
0 is controlled. Further, the anti-skid brake device also has the wheel speed sensors 1-1 to 1-4 and the foot brake switch 21, as in the first and second embodiments described above. Are the control valves 11-1 to 11-4, the actuator 12, the dual brake valve 13, the relay valve 14, the brake chambers 15-1 to 15-4, the quick release valve 16, and the air tanks 17-1 and 17-1.
7-2 are provided, and the operation of the anti-skid brake device is controlled by the ABS control unit 4.

Here, the first embodiment and the second embodiment are different from the first embodiment in that the retarder control unit 10 in the retarder device has the retarder control means 9 for controlling the operation state of the retarder 7 in accordance with the operation state of the operation lever 8. This is the same as the embodiment. Also, when the ABS control unit 4 detects the locked state of the wheels based on the wheel speed information from the wheel speed sensors 1-1 to 1-4 and the braking operation information by the foot brake from the foot brake switch 21, The control of the braking force so as to release the locked state is the same as in the first and second embodiments.

By the way, reference numeral 30 denotes a retarder when the wheels are locked.
The anti-skid brake control unit, which is a wheel-locking retarder / anti-skid brake control unit 30, is provided independently of the ABS control unit 4 and the retarder control unit 10, and locks the wheels when the retarder 7 operates. In this case, by outputting a control signal to the retarder control unit 10 and the ABS control unit 4,
Together reduce the braking force by the retarder 7, independently of the foot brake on / off, automatically Sir
The anti-skid brake system is operated as bis braking force is generated, Rita while releasing the locked state of the above
The brake force reduced by the operation control of the radar 7 is compensated for .

That is, the control system of the retarder control unit 10, the ABS control unit 4 and the retarder / anti-skid brake control unit 30 when the wheels are locked for performing the above control is as shown in FIG. In FIG. 7, a wheel speed sensor 1-
1-4, foot brake switch 21, operating lever 8, engine 5, drive wheel 6, control valve 11-
1 to 11-4 and the actuator 12 are the same as those shown in FIG.

As shown in FIG. 7, the ABS control unit 4 includes a wheel lock state detecting means 2 for detecting a wheel lock state from the wheel speed information detected by the wheel speed detecting means 1, and a foot lock state detecting means 2. When a braking operation by a foot brake is detected by a brake switch 21 and a wheel lock state is detected by a wheel lock state detection means 2, a brake force control means 3 for controlling a braking force so as to cancel the lock state is provided. ing.

The retarder control unit 10
Has a retarder control means 9 for controlling the operation state of the retarder 7 in accordance with the operation state of the operation lever 8. Further, the wheel-locked retarder / anti-skid brake control unit 30 receives the retarder operation information from the operation lever 8 and the wheel lock information from the wheel lock state detecting means 2 as described above, and outputs the wheel lock when the retarder 7 is actuated. When the vehicle is in the locked state, the braking force by the retarder 7 is reduced, and a signal for automatically operating the anti-skid brake device is output irrespective of ON / OFF of the foot brake, Therefore, the function of the wheel lock retarder / anti-skid brake control unit 30 is the same as that of the wheel lock retarder / anti-skid brake control means 9A, 3A in the first and second embodiments. it can.

From the above description, in the third embodiment, the wheel lock retarder / anti-skid brake control means is provided not in the retarder control means 9 and the brake force control means 3 but in an independent unit. It can be seen that the point is different from the first and second embodiments. Accordingly, the operation of the braking force control device according to the third embodiment is as follows. That is, the retarder / anti-skid brake control unit 30 at the time of wheel lock inputs the retarder operation information from the operation lever 8 and the wheel lock information from the wheel lock state detecting means 2, and the wheels are locked when the retarder 7 is actuated. When it is detected that there is no change, the retarder control unit 10 and the ABS control unit 4
Control signal is output to the control signal, and based on the control signal, the braking force of the retarder 7 is reduced, and the service brake is automatically turned on regardless of the on / off state of the foot brake.
Actuating the antiskid brake system as rake force is generated, the retarder 7 with releasing the locked state of the aforementioned
This compensates for the reduced braking force due to the operation control .

The other parts operate in the same manner as the first and second embodiments. Therefore, this third
Also in the case of the embodiment, when the wheels are locked due to the operation of the retarder 7, the service braking force is automatically generated similarly to the case of the first embodiment or the second embodiment. Since the anti-skid brake device can be operated, there is an advantage that deceleration by the retarder 7 in a place where the frictional force on the road surface is low can be performed with a stable behavior, and the time during which the wheels are locked can be reduced. .

[0046]

As described above in detail, according to the brake force control device for a vehicle with the anti-skid brake device and the retarder device of the present invention, the wheel speed detecting means for detecting the wheel speed, and the wheel speed detecting means A wheel lock state detecting means for detecting a wheel lock state from the detected wheel speed information, and a service for canceling the lock state when the wheel lock state detecting means detects the wheel lock state.
With equipped antiskid brake system and a brake force control means for controlling the scan braking force, and the retarder for decelerating the vehicle becomes load during interposed operation between the engine and the drive wheels, the retarder In a vehicle provided with a retarder device having an operation lever operated when it is desired to operate or to stop the operation of the retarder, and a retarder control means for controlling the operation state of the retarder according to the operation state of the operation lever. , The litter
And the operation of the anti-skid brake device.
Retarder / anti-skid brake when wheel is locked
Control means, when the wheel is locked, retarder / antis
When the locked state or the pseudo-locked state of the wheel is detected , the child brake control means controls the retarder so as to reduce the braking force by the retarder, and controls the service brake regardless of whether the foot brake is operated.
Which is configured to actuate the anti-skid brake system as rake force is generated, the deceleration by the retarder in places with low friction road surface, can be performed with a stable behavior, and the wheels are locked There is an advantage that the time required can be reduced.

[Brief description of the drawings]

FIG. 1 is a control block diagram of a braking force control device for a vehicle with an anti-skid brake device and a retarder device as a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram showing a brake pipe system and a control system of a vehicle having the brake force control device according to the first embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the brake force control device of the vehicle with the anti-skid brake device and the retarder device as the first embodiment of the present invention.

FIG. 4 is a time chart for explaining the operation of the brake force control device of the vehicle with the anti-skid brake device and the retarder device as the first embodiment of the present invention.

FIG. 5 is a control block diagram of a braking force control device for a vehicle with an anti-skid brake device and a retarder device as a second embodiment of the present invention.

FIG. 6 is an overall configuration diagram showing a brake piping system and a control system of a vehicle having a braking force control device according to a third embodiment of the present invention.

FIG. 7 is a control block diagram of a braking force control device for a vehicle with an anti-skid brake device and a retarder device as a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wheel speed detection means 1-1 to 1-4 Wheel speed sensor 2 Wheel lock state detection means 3 Brake force control means 3A, 9A Wheel lock retarder / anti-skid brake control means 4 ABS control unit 5 Engine 6 Drive wheel 7 Retarder Reference Signs List 8 operating lever 9 retarder control means 10 retarder control unit 11-1 to 11-4 control valve 12 actuator 13 dual brake valve 14 relay valve 15-1 to 15-4 brake chamber 16 quick release valve 17-1 and 17-2 air tank 18-1 to 18-4 Rotor 19 Differential 20 Follower wheel 21 Foot brake switch 30 Retarder / anti-skid brake control unit when wheel is locked

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60T 8/58

Claims (1)

(57) [Claims] 1. A wheel speed detecting means for detecting a wheel speed, a wheel lock state detecting means for detecting a wheel lock state from wheel speed information detected by the wheel speed detecting means, and a wheel lock state detecting means. An anti-skid brake device having a brake force control means for controlling a service brake force so as to cancel the locked state when the locked state of the wheel is detected. A retarder that is interposed in the vehicle and acts as a load to decelerate the vehicle, an operating lever that is operated when the retarder is to be operated or the retarder is to be stopped, and an operating state of the operating lever. A retarder control means for controlling an operation state of the retarder in response to the retarder and the anti-skid. Activate the brake device
Retarder and anti-skid when locked together
Brake control means, retarder / anti-skid brake control when the wheels are locked
When the locked state or the pseudo-locked state of the wheel is detected , the means controls the retarder to reduce the braking force by the retarder, and generates the service braking force regardless of the presence or absence of the foot brake operation. characterized in that makes operating the anti-skid brake system, anti-skid brake system and a retarder device with a brake force control apparatus for a vehicle.