CN221138044U

CN221138044U - Bridge brake module and electronic brake system

Info

Publication number: CN221138044U
Application number: CN202322702116.7U
Authority: CN
Inventors: 邱国光
Original assignee: ZF Commercial Vehicle Systems Qingdao Co Ltd
Current assignee: ZF Commercial Vehicle Systems Qingdao Co Ltd
Priority date: 2023-10-09
Filing date: 2023-10-09
Publication date: 2024-06-14
Anticipated expiration: 2033-10-09

Abstract

The utility model relates to the technical field of braking, and provides a bridge braking module and an electronic braking system. The bridge brake module includes: the relay piston divides the valve cavity into a control cavity and a braking cavity, the control cavity is connected with a control port, and the braking cavity is connected with an exhaust port; the first check valve is arranged in a first exhaust channel of the brake cavity, which leads to the exhaust port; the second one-way valve is arranged in a second exhaust channel of the relay piston, which is communicated with the control cavity and the braking cavity; an exhaust control electromagnetic valve connected with the control port; in a brake release state, the gas in the brake cavity pushes the first check valve and the second check valve to conduct the first exhaust channel and the second exhaust channel respectively, and the exhaust control electromagnetic valve is conducted; wherein the opening pressure of the second one-way valve is less than the opening pressure of the first one-way valve. According to the utility model, the waterproof function of the bridge brake module is realized through the first one-way valve; residual pressure in the valve cavity is exhausted under the brake release state through the second one-way valve and the exhaust control electromagnetic valve.

Description

Bridge brake module and electronic brake system

Technical Field

The utility model relates to the technical field of braking, in particular to a bridge braking module and an electronic braking system.

Background

The axle brake module is arranged on the chassis of the vehicle, and the wading problem is often caused.

Traditional bridge braking module does not possess waterproof function, and under wading operating mode, water can get into the valve pocket inside through bridge braking module's gas vent, causes the product even whole braking system to become invalid.

Aiming at the wading problem of the bridge brake module, if the check valve is arranged at the exhaust port, the air pressure in the valve cavity can not be exhausted when the brake is released easily, the residual air pressure can influence the tightness in the valve cavity, and even the whole brake system can be disabled.

It should be noted that the information disclosed in the foregoing background section is only for enhancement of understanding of the background of the utility model and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of utility model

In view of the above, the present utility model provides a bridge brake module and an electronic brake system that can effectively realize a waterproof function and can realize exhaustion of residual pressure in a valve chamber in a brake release state.

One aspect of the utility model provides a bridge brake module comprising a relay piston disposed in a valve chamber, the relay piston dividing the valve chamber into a control chamber and a brake chamber, the control chamber being connected with a control port, the brake chamber being connected with an exhaust port; the bridge brake module further comprises: a first check valve disposed in a first exhaust passage of the brake chamber leading to the exhaust port; the relay piston is provided with a second exhaust channel which is communicated with the control cavity and the braking cavity, and the second check valve is arranged in the second exhaust channel; an exhaust control electromagnetic valve connected with the control port; in a brake release state, the gas in the brake cavity pushes the first one-way valve to conduct the first exhaust channel, pushes the second one-way valve to conduct the second exhaust channel, and the exhaust control electromagnetic valve is conducted; wherein the opening pressure of the second one-way valve is smaller than the opening pressure of the first one-way valve.

In some embodiments, the bridge brake module further comprises: the air pressure sensor is connected with the braking cavity; and in the brake release state, the air pressure value of the air pressure sensor, which is conducted by the air exhaust control electromagnetic valve, is reduced to a preset air pressure value.

In some embodiments, the exhaust control solenoid valve and the air pressure sensor are both connected to an electronic control unit.

In some embodiments, the exhaust control solenoid valve is a normally closed solenoid valve.

In some embodiments, the bridge brake module further comprises: an air inlet control electromagnetic valve connected with a control air source and the control port; in the brake release state, the air intake control electromagnetic valve is closed; in an electric control braking state, the air inlet control electromagnetic valve is connected, and the air outlet control electromagnetic valve is disconnected.

In some embodiments, the bridge brake module further comprises: an air inlet standby electromagnetic valve which is connected with the foot brake valve and the control port; the air inlet standby electromagnetic valve is cut off under the brake release state and the electric control brake state; in the preparation braking state, the air inlet standby electromagnetic valve is conducted, and the air inlet control electromagnetic valve and the air outlet control electromagnetic valve are cut off.

In some embodiments, the intake control solenoid valve is a normally closed solenoid valve and the intake backup solenoid valve is a normally open solenoid valve.

In some embodiments, the intake control solenoid valve and the intake backup solenoid valve are both connected to an electronic control unit.

A further aspect of the utility model provides an electric brake system configured with a bridge brake module as described in any of the embodiments above.

Compared with the prior art, the utility model has the beneficial effects that at least:

According to the bridge brake module, the waterproof function is realized through the first one-way valve arranged in the first exhaust channel of the brake cavity leading to the exhaust port, so that water is prevented from entering the valve cavity from the exhaust port, the bridge brake module meets the requirement of underwater operation, the waterproof capacity of a product is improved, and the cleanliness of a brake pipeline of the whole vehicle and the service life of brake parts are prolonged; in a brake release state, the first check valve conducts the first exhaust channel to realize exhaust; through setting up the second check valve in the second exhaust passage of intercommunication control chamber and braking chamber and the exhaust control solenoid valve of connection control mouth, and the opening pressure of second check valve is less than the opening pressure of first check valve, makes exhaust control solenoid valve keep switching on under the braking release state, can effectively exhaust the residual pressure in the valve pocket, implements simple and conveniently, ensures that product and whole braking system are reliable and stable, improves the security of vehicle.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. It is evident that the figures described below are only some embodiments of the utility model, from which other figures can be obtained without inventive effort for a person skilled in the art.

Wherein,

FIG. 1 shows an exhaust path of a bridge brake module in a schematic structural view in a brake released state;

Fig. 2 shows the intake path in the electrically controlled braking state of the structural principle schematic diagram of the bridge brake module;

Fig. 3 shows a schematic structural diagram of the bridge brake module in the compressed state of the intake path.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

The drawings are merely schematic illustrations of the present utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.

The use of the terms "first," "second," and the like in the description herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. In the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

It should be noted that, without conflict, the embodiments of the present utility model and features in different embodiments may be combined with each other.

Fig. 1 shows the construction principle of a bridge brake module, wherein the exhaust path in the brake release state is marked; referring to fig. 1, a bridge brake module according to an embodiment of the present utility model includes:

A relay piston 10 disposed in the valve chamber, the relay piston 10 dividing the valve chamber into a control chamber 20 and a brake chamber 30, the control chamber 20 being connected with the control port 22, the brake chamber 30 being connected with the exhaust port 33;

A first check valve 40 provided in a first exhaust passage 300 of the brake chamber 30 leading to the exhaust port 33;

A second one-way valve 50, the relay piston 10 being provided with a second exhaust passage 100 communicating the control chamber 20 and the brake chamber 30, the second one-way valve 50 being provided in the second exhaust passage 100;

An exhaust control solenoid valve 60 connected to the control port 22;

In the brake release state, the gas in the brake chamber 30 pushes the first check valve 40 to conduct the first exhaust passage 300, pushes the second check valve 50 to conduct the second exhaust passage 100, and the exhaust control solenoid valve 60 is turned on;

Wherein the opening pressure of the second check valve 50 is smaller than the opening pressure of the first check valve 40.

According to the bridge brake module, the first one-way valve 40 arranged in the first exhaust channel 300 of the brake cavity 30, which is communicated with the exhaust port 33, realizes a waterproof function, prevents water from entering the valve cavity from the exhaust port 33, enables the bridge brake module to meet the requirement of underwater operation, improves the waterproof capacity of products, and improves the cleanliness of a brake pipeline of the whole vehicle and the service life of brake parts.

The first check valve 40 may specifically be a spring-loaded valve structure. Under the action of spring force, the first check valve 40 is in sealing contact with the inner wall of the first exhaust passage 300, and at this time, water, gas, etc. from the exhaust port 33 cannot enter the valve cavity; when the spring is compressed downward, the first check valve 40 is out of sealing contact with the first exhaust passage 300, thereby conducting the first exhaust passage 300, allowing the gas in the brake chamber 30 to be exhausted through the first exhaust path P1 (brake chamber 30→first exhaust passage 300→exhaust port 33→outside the valve).

In this way, the waterproof function of the bridge brake module is realized by utilizing the unidirectional conduction characteristic of the first check valve 40, and the first check valve 40 can conduct the first exhaust passage 300 in the brake release state to realize the exhaust.

Further, in order to ensure that the gas in the brake chamber 30 is exhausted and is not affected by the first check valve 40 in the brake released state, the bridge brake module of the present utility model further includes a second check valve 50 in the second exhaust passage 100 of the relay piston 10, which communicates the control chamber 20 with the brake chamber 30, and an exhaust control solenoid valve 60 connected to the control port 22, and the opening pressure of the second check valve 50 is smaller than the opening pressure of the first check valve 40; in this way, when the gas in the brake chamber 30 is gradually discharged and the first check valve 40 is restored to the sealing contact with the first exhaust passage 300, the residual gas in the brake chamber 30 can continue to push the second check valve 50, and is smoothly discharged through the second exhaust path P2 (brake chamber 30→second exhaust passage 100→control chamber 20→control port 22→exhaust control solenoid valve 60→outside the valve).

The second check valve 50 may specifically be a sealing plug. In the braking state, the gas from the braking chamber 30 lightly pushes the second check valve 50, so that the second check valve 50 is separated from sealing contact with the inner wall of the second exhaust passage 100, thereby conducting the passage between the braking chamber 30 and the control chamber 20; and when the gas from the control chamber 20 pushes the second check valve 50, the second check valve 50 maintains sealing contact with the inner wall of the second exhaust passage 100 to prevent gas leakage in the braked state.

Therefore, in the brake release state, residual pressure in the valve cavity can be effectively discharged only by keeping the exhaust control electromagnetic valve 60 on, the implementation is simple and convenient, the stability and reliability of products and the whole brake system are ensured, and the safety of the vehicle is improved.

In some embodiments, the bridge brake module further comprises:

an air pressure sensor 66 connected to the brake chamber 30;

in the brake release state, the air pressure value at which the exhaust control solenoid valve 60 is turned on to the air pressure sensor 66 is reduced to a preset air pressure value.

The air pressure value of the air pressure sensor 66 reflects the residual air pressure in the valve chamber; when the air pressure value of the air pressure sensor 66 is reduced to a preset air pressure value (the preset air pressure value is, for example, 0.05bar, but not limited to, it indicates that the air in the valve cavity is substantially exhausted, and the residual pressure in the valve cavity is small and negligible, so that the exhaust control electromagnetic valve 60 can be closed to end the exhaust process.

Conventionally, in the brake release state, only the gas in the control chamber 20 is exhausted through the control port 22, and it is exhausted in a short time; in the utility model, the conduction time of the exhaust control electromagnetic valve 60 is prolonged, and the conduction time of the exhaust control electromagnetic valve 60 is controlled based on the air pressure value monitored by the air pressure sensor 66, so that the residual pressure in the valve cavity is ensured to be exhausted.

In some embodiments, the exhaust control solenoid valve 60 and the air pressure sensor 66 are both connected to an electronic control unit ECU. Thus, the ECU can control the on-state of the exhaust control solenoid valve 60 according to the brake release signal (e.g., release the brake pedal), and control the on-state time of the exhaust control solenoid valve 60 according to the air pressure value detected by the air pressure sensor 66, so as to accurately and conveniently realize the exhaustion of residual pressure in the valve cavity in the brake release state.

In some embodiments, the exhaust control solenoid 60 is a normally closed solenoid. That is, when not energized, the exhaust control solenoid valve 60 remains in a closed state; when the power is on, the valve chamber of the exhaust control solenoid valve 60 is turned on, and the gas passes through.

Fig. 2 shows the construction principle of a bridge brake module, wherein the intake path in the electrically controlled braking state is marked; as shown in connection with fig. 1 and 2, in some embodiments, the bridge brake module further comprises:

an intake control solenoid valve 70 connecting the control air source 22' and the control port 22;

in the brake release state, the intake control solenoid valve 70 is closed;

In the electric control braking state, the intake control solenoid valve 70 is turned on, and the exhaust control solenoid valve 60 is turned off.

The air inlet control electromagnetic valve 70 may be connected to the control air source 22', and in the electrically controlled braking state, the air inlet control electromagnetic valve 70 is turned on, so that the control air of the control air source 22' enters the control chamber 20 through the first air inlet path P3 (control air source 22'→air inlet control electromagnetic valve 70→control port 22), acts on the relay piston 10, presses down the relay piston 10, and turns on the channel between the air inlet 82 and the air outlet 84 of the bridge brake module, so that the brake air from the air inlet 82 flows to the air outlet 84 through the brake chamber 30, and further flows to the brake air chamber 84' through the air outlet 84, thereby realizing braking.

Wherein the control air source 22 'is another air source different from the foot brake valve, and can be realized by connecting the control air source 22' and the control port 22 through the air inlet control electromagnetic valve 70 instead of the control air from the foot brake valve: according to different braking demands, the pressure of the control gas output by the control gas source 22' is adjusted, so that the pressure of the braking gas output by the gas outlet 84 is adjusted accordingly, the braking of the vehicle is more suitable for the actual working condition, and the braking safety and effectiveness of the vehicle are improved.

In addition, in the piping where the air outlet 84 is connected to the brake chamber 84', a sensor for detecting air pressure may be provided, which is connected to the electronic control unit ECU to monitor the brake air pressure supplied to the brake chamber 84'.

Further, fig. 3 shows the structural principle of the bridge brake module, wherein the air intake path in the pressed brake state is marked; as shown in connection with fig. 1-3, in some embodiments, the bridge brake module further comprises:

An intake backup solenoid valve 90 connecting the service brake valve 22″ and the control port 22;

in the brake release state and the electric control brake state, the intake standby solenoid valve 90 is turned off;

in the preparation brake state, the intake standby solenoid valve 90 is turned on, and the intake control solenoid valve 70 and the exhaust control solenoid valve 60 are turned off.

In the braking state, if the EBS electric control fails, the solenoid valve cannot participate in the operation, the air intake standby solenoid valve 90 communicates with the air outlet and the control port 22 of the foot brake valve 22", and the brake control air pressure from the foot brake valve realizes the air intake of the control chamber 20 through the second air intake path P4 (foot brake valve 22" →air intake standby solenoid valve 90→control port 22).

Thus, the bridge brake module of the utility model is provided with conventional brake control logic through the air inlet standby electromagnetic valve 90, so that normal brake operation is ensured; meanwhile, under the condition that the EBS electric control braking is normal in operation, the air inlet standby electromagnetic valve 90 can be cut off in a braking state so as to adjust the braking control air pressure according to the actual braking requirement of the vehicle.

In some embodiments, the inlet control solenoid valve 70 is a normally closed solenoid valve and the inlet back-up solenoid valve 90 is a normally open solenoid valve. Thus, in a conventional manner, the inlet control solenoid valve 70 and the inlet backup solenoid valve 90 are de-energized, and the bridge brake module of the present utility model is provided with conventional brake control logic based on the brake control air pressure of the service brake valve; in the case where the EBS electric control braking is required, the intake standby solenoid valve 90 is energized, and the intake control solenoid valve 70 and the exhaust control solenoid valve 60 are reasonably controlled to be energized and de-energized, so as to effectively adjust the braking control air pressure.

In some embodiments, both the inlet control solenoid valve 70 and the inlet backup solenoid valve 90 are connected to an electronic control unit ECU. In this manner, the ECU may control the inlet control solenoid valve 70 and the inlet standby solenoid valve 90 in accordance with the associated brake signal (e.g., depression of a brake pedal).

In the above embodiments, in order to clearly show the direction and control logic of the air path of the bridge brake module in various working conditions such as the brake release state, the electric control brake state, the pressure brake state, etc., the components such as the exhaust control solenoid valve 60, the intake control solenoid valve 70, the intake standby solenoid valve 90, etc. are shown in fig. 1 to 3 as being externally arranged on the valve body of the bridge brake module; in practical products, the exhaust control solenoid valve 60, the intake control solenoid valve 70, the intake standby solenoid valve 90, and other components may be integrated into the valve body of the bridge brake module, and the illustration should not be construed as limiting the specific arrangement of the components of the bridge brake module of the present utility model. The components of the bridge brake module only meet the connection relation and the control logic described in any embodiment, so that the bridge brake module can realize waterproof protection and residual pressure in the valve cavity in a brake release state besides the conventional functions of the existing bridge brake module.

In addition, the exhaust of the present utility model refers to making the residual air pressure in the valve cavity smaller than a reasonable threshold, and the description of the embodiments can be referred to specifically, and the description will not be repeated here.

The embodiment of the utility model also provides an electronic brake system EBS provided with a bridge brake module as described in any of the embodiments above.

The EBS of the electronic brake system is provided with the bridge brake module, so that the conventional functions of the existing electronic brake system can be met, waterproof protection can be realized, the requirement of underwater work can be met, the cleanliness of a brake pipeline of the whole vehicle and the service life of brake parts can be improved, residual pressure in a valve cavity can be exhausted in a brake release state, the stability and reliability of the whole brake system can be ensured, and the safety of a vehicle can be improved.

The control logic of the bridge brake module of the present utility model is described below in conjunction with fig. 1-3. The control logic of the bridge brake module comprises the steps of:

In response to the brake release signal, the exhaust control solenoid valve 60 is controlled to be turned on until the valve chamber is exhausted.

The brake release signal is issued, for example, when the driver releases the brake pedal. In response to the brake release signal, the exhaust control solenoid valve 60 is turned on to assist in exhausting the valve chamber, and the exhaust control solenoid valve 60 remains in an on state until residual pressure in the valve chamber is exhausted.

Further, the bridge brake module also includes an air pressure sensor 66 connected to the brake chamber 30; in response to the brake release signal, further comprising: the air pressure value of the air pressure sensor 66 is monitored, and when the monitored air pressure value is reduced to a preset air pressure value, the exhaust control solenoid valve 60 is controlled to be turned off.

The air pressure value of the air pressure sensor 66 reflects the residual air pressure in the valve chamber; when the air pressure value of the air pressure sensor 66 is reduced to a preset air pressure value (for example, but not limited to, 0.05 bar), the air in the valve cavity is substantially exhausted, and the residual pressure in the valve cavity is small and negligible, so that the exhaust control electromagnetic valve 60 can be closed to end the exhaust process.

Further, the control logic of the bridge brake module may further control the bridge brake module to implement the above-mentioned electric control brake state, standby brake state, etc., and specifically, refer to the description of the above-mentioned embodiment, and the description will not be repeated.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. The bridge braking module comprises a relay piston arranged in a valve cavity, wherein the relay piston divides the valve cavity into a control cavity and a braking cavity, the control cavity is connected with a control port, and the braking cavity is connected with an exhaust port;

Characterized in that the bridge brake module further comprises:

A first check valve disposed in a first exhaust passage of the brake chamber leading to the exhaust port;

The relay piston is provided with a second exhaust channel which is communicated with the control cavity and the braking cavity, and the second check valve is arranged in the second exhaust channel;

An exhaust control electromagnetic valve connected with the control port;

In a brake release state, the gas in the brake cavity pushes the first one-way valve to conduct the first exhaust channel, pushes the second one-way valve to conduct the second exhaust channel, and the exhaust control electromagnetic valve is conducted;

wherein the opening pressure of the second one-way valve is smaller than the opening pressure of the first one-way valve.

2. The bridge brake module of claim 1, further comprising:

The air pressure sensor is connected with the braking cavity;

And in the brake release state, the air pressure value of the air pressure sensor, which is conducted by the air exhaust control electromagnetic valve, is reduced to a preset air pressure value.

3. The bridge brake module of claim 2, wherein the exhaust control solenoid valve and the air pressure sensor are each connected to an electronic control unit.

4. The bridge brake module of claim 1, wherein the exhaust control solenoid valve is a normally closed solenoid valve.

5. The bridge brake module of claim 1, further comprising:

an air inlet control electromagnetic valve connected with a control air source and the control port;

In the brake release state, the air intake control electromagnetic valve is closed;

in an electric control braking state, the air inlet control electromagnetic valve is connected, and the air outlet control electromagnetic valve is disconnected.

6. The bridge brake module of claim 5, further comprising:

an air inlet standby electromagnetic valve which is connected with the foot brake valve and the control port;

The air inlet standby electromagnetic valve is cut off under the brake release state and the electric control brake state;

in the preparation braking state, the air inlet standby electromagnetic valve is conducted, and the air inlet control electromagnetic valve and the air outlet control electromagnetic valve are cut off.

7. The bridge brake module of claim 6, wherein the inlet control solenoid valve is a normally closed solenoid valve and the inlet backup solenoid valve is a normally open solenoid valve.

8. The bridge brake module of claim 6, wherein the inlet control solenoid valve and the inlet backup solenoid valve are each connected to an electronic control unit.

9. An electric brake system, characterized in that a bridge brake module as claimed in any one of claims 1-8 is provided.