JPS6116655B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a brake lock prevention device for wheel brakes of a vehicle, which comprises a pressure control valve device having one 3-port 2-position valve and at least two 2-port 2-position valves. Thus, the brake pressure of the brake cylinders of the group is commonly controlled, and a 3-port 2-position valve common to the brake cylinders of the group is inserted into the brake conduit to the brake cylinder, and the brake conduit is connected to the 3-port 2-position valve common to the brake cylinders of the group. Downstream of the position valve, each brake cylinder is connected via a branch brake conduit, each having a two-port two-position valve. Such brake lock prevention devices are known.

However, known brake lock prevention systems are expensive because they require special piping and wiring and control magnets for each axle.

On the other hand, according to the configuration of the present invention, if one group of brake cylinders is distributed to a plurality of axles, it becomes possible to simultaneously control the brake pressure for the wheels of a plurality of axles in various pressure ranges. . That is, during the brake pressure reduction phase of one axle, the brake pressure of the remaining axles only needs to be maintained for a short time.

Not only is the valve less expensive, but the power requirements are reduced and the piping and wiring simplified compared to known constructions with comparable functionality.

In the known brake lock prevention device, each axle is provided with a pressure control device, and the brake pressure for each axle is controlled separately, resulting in a significant reduction in brake function and running stability. In this configuration, one axle of a composite axle unit having at least two axles is controlled to a lower braking pressure (select low control).
Then, the other axle can be controlled to a higher braking pressure (select high control), or the wheels on each side of the vehicle can be controlled in common.

This makes it possible to improve driving stability during braking regardless of road surface conditions.

Particularly in the case of pressurized air brakes, the cylinder delay time is determined by the length of the brake conduit between the pressure control valve and the brake cylinder, so axles that are close to each other among multiple axles can be controlled in common. It is best to keep them together in the aisle. In particular, the present invention
Applicable to freight vehicles, trailer vehicles, railway vehicles, etc.

In the following, the configuration of the present invention will be specifically explained with reference to embodiments shown in the drawings.

A pressurized air tank 1 is connected to a brake valve 2, which supplies four brake cylinders 3, 4, 5, 6 with pressurized air. Brake cylinders 3-6 operate the brakes of four wheels 7, 8, 9, 10 distributed on two axles 11 and 12.

In the brake conduit 13 from the brake valve 2, 2
A pressure control valve arrangement 14 of the brake antilock device is arranged, which has two control channels. This pressure control valve device 14 has three front control valves 15, 16, 17 configured as 3-port 2-position valves, and these front control valves are connected to main valves 21, 22, 23.
control conduits 18, 19, 20, respectively.

The central main valve 22 is connected directly to the brake line 13. This main valve 22 is configured as a 3-port 2-position valve, and the remaining two main valves 21
and 23. These two main valves 21 and 23 are configured as 2-port 2-position valves, and the brake cylinders 3 and 4
or control the brake conduits 26 and 27 leading to 5, 6. Reference numeral 28 is an outside air connection port for releasing braking air.

When normal braking is performed, the main valves 21 to 23 are all open, and braking air reaches the brake cylinders 3 to 6 via the main valve 22, passages 24 and 25, and the main valves 21 and 23.

For example, if the axle 11 with the brake cylinders 3 and 4 is overbraked, the brake lock prevention device reacts and the front control valves 16 and 17 are switched over. As a result, the main valve 22 is switched to allow the air in the brake cylinders 3 and 4 to escape to the outside, and at the same time, the main valve 23 is also switched to the closed state to close the brake cylinders 5 and 4 of the unlocked axle 12. The pressure within 6 is maintained. At the end of the pressure reduction phase in the brake cylinders 3 and 4, all pre-control valves 15, 16, 17 are switched and the main valves 22 and 23 are opened so that the pressure in the brake cylinders 5 and 6 continues to increase; The main valve 21 is closed to maintain the reduced brake pressure in the brake cylinders 3 and 4, and at the end of this brake pressure maintenance phase the precontrol valve 15 is closed again and the main valve 21 is again in the open state. This causes the brake cylinder 3
The reduced brake pressure in and 4 is raised again.

In this case, according to the invention, the reduction and increase of the brake pressure on both axles 11 and 12 takes place via a common main valve 22, and the control of the individual brake cylinders is carried out via the downstream main valves 21 and 23. It is done by folding. In this way, although only one 3-port, 2-position valve is used, both axles 11 and 12 can be controlled in various ways. During the pressure reduction phase of one pair of brake cylinders 3, 4 or 5, 6, the pressure increase in the other pair of brake cylinders only needs to be interrupted for a short time.

Of course, in the embodiment of FIG. 1 it is also possible to reduce the pressure in both pairs of brake cylinders 3, 4 and 5, 6 at the same time.

2 to 7 show embodiments in which the sensor S and the two passages K are arranged in various ways in a two-axle unit having two control passages. The symbol DSV is a pressure control valve device as shown in FIG. 1, and the three parallel short lines represent the current supply to the three magnets of the front control valves 15, 16, 17.

In FIG. 2, a two-axle unit with four wheels is provided with one sensor for each wheel, and the control paths on each side of the vehicle are combined into one path.

In FIG. 3, a sensor is provided on only one axle wheel of a two-axle unit having four wheels, and the control paths on each side of the vehicle are combined into one path.

In FIG. 4, a two-axle unit having four wheels is provided with sensors on two diagonal wheels of one side, and the control paths on each side of the vehicle are combined into one path.

In FIG. 5, one sensor is provided for each wheel of a two-axle unit having four wheels, and the control paths for each axle are combined into one path.

In FIG. 6, sensors are provided on two diagonally opposite wheels of a two-axle unit having four wheels, and the control paths for each axle are combined into one path.

In FIG. 7, one common sensor is provided for each axle wheel of a two-axle unit having four wheels, and the control paths for each axle are combined into one path.

The pressure control valve device 30 shown in FIG. 8 controls a three-axle unit or a two-axle unit using three passages.

Portions corresponding to those in FIG. 1 are designated by the same reference numerals in FIG. 8 as well. In FIG. 8, a main valve 32 which is switched by an electromagnetic front control valve 31 is added, thereby enabling three-passage control. With three-path control, an additional brake pressure maintenance phase can be created, thereby avoiding pressure air losses during brake pressure reduction.

In FIGS. 9 to 16, in a three-axle unit and a two-axle unit having such three control passages, the sensor S and the three passages K are
Embodiments are shown in which the arrangement format is changed in various ways. The symbol DSV' is a pressure control valve device as shown in FIG. 8, and the four parallel short lines represent the current supply to the four magnets of the front control valves 15, 16, 17, and 31.

In FIG. 9, one sensor is provided for each wheel of a three-axle unit having six wheels, and the control paths for each axle are combined into one path.

In FIG. 10, one sensor is provided for each wheel of a three-axle unit having six wheels, and the control paths on each side of the vehicle for the two axles are combined into one path. , the third axle has one control passage.

In FIG. 11, sensors are provided on two diagonal wheels of one of the two axles of a three-axle unit having six wheels, and one sensor is provided on each wheel of the third axle. The control passages for each axle are combined into one passage.

In FIG. 12, one sensor is provided on each wheel of two axles of a three-axle unit having six wheels, and the control paths on each side of the vehicle of the two axles are connected to one path. The third axle has one control passage.

In FIG. 13, sensors are provided on two diagonal wheels of one of the two axles of a three-axle unit having six wheels, and one sensor is provided on both wheels of the third axle. Sensors are provided and the control passages on each side of the vehicle of the two axles are combined into one passage, with the third axle having one control passage.

In FIG. 14, each axle of a three-axle unit with six wheels is provided with one common sensor, and each axle has a respective control path.

In FIG. 15, a two-axle unit with four wheels is provided with one sensor for each wheel, one axle having two control paths and the other axle having one control path. are doing.

In FIG. 16, a two-axle unit with four wheels is provided with one sensor for each wheel on one axle, and one common sensor for both wheels on the other axle. one axle has two control passages and the other axle has one control passage.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a two-path controlled brake lock prevention device for a two-axle unit, and FIGS. 2, 3, 4, 5, 6, and 7 are
FIG. 8 is a schematic diagram of a two-passage control system in which the arrangement of sensors and passages is varied in a two-axle unit; FIG. 8 is a schematic diagram of a pressure control valve device of a three-passage control system; FIGS. 9 and 10.・Figure 11・1st
Figure 2, Figure 13, Figure 14, Figure 15, and Figure 16 are schematic diagrams of a three-passage control system in which the arrangement of sensors and passages is varied in a two-axle unit and a three-axle unit. be. 1... Pressure air tank, 2... Brake valve, 3
~6...Brake cylinder, 7~10...Wheel,
11, 12... Axle, 13... Brake conduit, 1
4... Pressure control valve device, 15-17... Front control valve, 18-20... Control conduit, 21-23... Main valve, 24, 25... Passage, 26, 27... Brake conduit, 28... ... outside air connection port, 30 ... pressure control valve device, 31 ... front control valve, 32 ... main valve,
DSV, DSV'...pressure control valve device, K...passage,
S...Sensor.

Claims (1)

[Scope of Claims] 1. A brake lock prevention device for wheel brakes of a vehicle, comprising a pressure control valve device having one 3-port 2-position valve and at least two 2-port 2-position valves. The brake pressure of the brake cylinders is commonly controlled, and a 3-port, 2-position valve common to a group of brake cylinders is inserted into the brake conduit to the brake cylinder, the brake conduit being downstream of the 3-port, 2-position valve. A group of brake cylinders 3, in a type that leads to each brake cylinder at the side via a branch brake conduit, each having a 2-port 2-position valve.
A brake lock prevention device characterized in that brake wheels 4, 5, and 6 are distributed over a plurality of axles 11 and 12. 2. A two-axle unit having four wheels, each wheel of which is provided with one sensor, and the control paths on each side of the vehicle are combined into one path. Brake lock prevention device. 3. A sensor is provided only on the wheel of one axle of a two-axle unit having four wheels, and the control passages on each side of the vehicle are combined into one passage. Brake lock prevention device as described. 4. A two-axle unit having four wheels, in which sensors are provided on two diagonal wheels of one side, and the control paths on each side of the vehicle are combined into one path, respectively. Brake lock prevention device according to item 1. 5. The brake according to claim 1, wherein one sensor is provided for each wheel of a two-axle unit having four wheels, and the control paths for each axle are combined into one path. Anti-lock device. 6. Sensors are provided on two diagonal wheels of a two-axle unit having four wheels, and the control paths of each axle are combined into one path, claim 1. Brake lock prevention device as described. 7. Claim 1, wherein one common sensor is provided for each axle wheel of a two-axle unit having four wheels, and the control paths of each axle are combined into one path. Brake lock prevention device as described. 8. In order to commonly control the brake pressure of a group of brake cylinders, an additional two-port two-position valve is provided as a valve for the brake pressure maintenance phase. Brake lock prevention device. 9. The brake according to claim 8, wherein one sensor is provided for each wheel of a three-axle unit having six wheels, and the control paths for each axle are combined into one path. Anti-lock device. 10 A three-axle unit with six wheels is provided with one sensor for each wheel,
The brake lock prevention device according to claim 8, wherein the control passages on each side of the vehicle of the two axles are combined into one passage, and the third axle has one control passage. . 11 2 of 3 axle unit with 6 wheels
Two diagonal wheels on one of the book axles are provided with sensors, each wheel on the third axle is provided with one sensor, and the control paths of each axle are combined into one path. A brake lock prevention device according to claim 8, wherein the brake lock prevention device is 12 2 of 3 axle unit with 6 wheels
One sensor is provided on each wheel of the main axle, the control paths on each side of the vehicle of the two axles are combined into one path, and the third axle has one control path. 9. A brake lock prevention device according to claim 8. 13 2 of 3 axle unit with 6 wheels
Two diagonal wheels on one of the main axles are provided with sensors, and both wheels on the third axle are provided with one sensor each to control each side of the vehicle on the two axles. 9. Brake lock prevention device according to claim 8, wherein the passages are each combined into one passage, and the third axle has one control passage. 14. The brake according to claim 8, wherein each axle of a three-axle unit having six wheels is provided with one common sensor, and each axle has one control path. Anti-lock device. 15 A two-axle unit with four wheels is provided with one sensor for each wheel,
9. The brake lock prevention device of claim 8, wherein one axle has two control passages and the other axle has one control passage. 16 A two-axle unit with four wheels has one sensor on each wheel on one axle and one sensor on both wheels on the other axle.
9. Brake lock prevention device according to claim 8, wherein two common sensors are provided, one axle having two control paths and the other axle having one control path.