CN117794799A - Brake actuator for a vehicle, brake system for a vehicle and method of monitoring the braking force of a brake actuator - Google Patents
Brake actuator for a vehicle, brake system for a vehicle and method of monitoring the braking force of a brake actuator Download PDFInfo
- Publication number
- CN117794799A CN117794799A CN202180101153.3A CN202180101153A CN117794799A CN 117794799 A CN117794799 A CN 117794799A CN 202180101153 A CN202180101153 A CN 202180101153A CN 117794799 A CN117794799 A CN 117794799A
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- Prior art keywords
- brake actuator
- actuator
- brake
- push rod
- sensor
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- 238000000034 method Methods 0.000 title claims description 12
- 238000012544 monitoring process Methods 0.000 title claims description 9
- 230000033001 locomotion Effects 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/08—Brake cylinders other than ultimate actuators
- B60T17/081—Single service brake actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/003—Position, angle or speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D2066/005—Force, torque, stress or strain
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Braking Arrangements (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
A brake actuator for a vehicle, in particular a commercial vehicle, comprising an actuator housing and a push rod mounted within the actuator housing, the push rod being adapted to be coupled to a brake mechanism and to be moved in a reciprocating manner between a retracted position and an extended position, wherein the movement between the retracted position and the extended position defines a stroke. The brake actuator proposed by the invention comprises sensor means for measuring the stroke position of the push rod of the brake actuator.
Description
The invention relates to a brake actuator for a vehicle, in particular a commercial vehicle, comprising: an actuator housing and a push rod mounted within the actuator housing, the push rod adapted to be coupled to a brake mechanism and adapted to move in a reciprocating manner between a retracted position and an extended position, wherein movement between the retracted position and the extended position defines a stroke.
Spring brake actuators of the aforementioned type are known from the prior art and are often implemented in commercial vehicles to generate braking forces applied to the wheels of the vehicle.
An actuator is a device for braking, which consists of a spring side and a service side—in the case of a brake chamber, only of the service side. The actuator converts pneumatic pressure into a mechanical stroke by linear motion. End users, particularly drivers of vehicles, do not have a direct connection to the travel of the actuator. For this reason, the stroke of the actuator is typically unknown to the end user. The latter may be used as a characteristic value for knowing the braking force generated.
The object of the present invention is therefore to propose a brake actuator which overcomes the above-mentioned drawbacks as far as possible. In particular, it is an object to provide a brake actuator whereby the stroke of the brake actuator can be measured and preferably displayed in the driver's cab.
The present invention achieves the above object in a first aspect by proposing a brake actuator according to claim 1. In particular, the actuator comprises sensor means for measuring the stroke position of the push rod of the brake actuator. The sensor means determines the position of the push rod between its retracted position and its extended position and outputs an echo output signal which can be transmitted to a processor unit, preferably a microcontroller, to estimate the stroke position of the brake actuator. The stroked position is the position of the push rod between the retracted position and the extended position. The travel may be measured from an initial position (i.e., in a fully retracted position) to an end position (i.e., in a fully extended position). The travel position is a function of the corresponding braking force. The proposed brake actuator with a sensor for stroke measurement is able to track the linear movement (stroke) of the push rod and thus determine the position within said movement or stroke without affecting the main function of the actuator.
In one embodiment, the brake actuator is a spring brake actuator or a dual diaphragm spring brake actuator.
In a preferred embodiment, the push rod comprises a piston plate and a piston rod, and the sensor means measures the position of the piston plate within the movement of the piston plate, preferably the sensor means measures the distance to the piston plate relative to the position of the sensor means. The piston plate preferably has a large flat surface. This moving element of the push rod is thus very suitable for performing distance measurements thereon.
In another preferred embodiment, the sensor device comprises a sensor head comprising a transmitter and a receiver. When the trigger pin of the sensor device is set high for at least 10 mus, the transmitter transmits sound waves at sonic speed. The sound waves strike the piston plate and are reflected by the piston plate and received by the receiver of the sensor. The reflected sound wave is received by the echo pin. The echo pin then outputs the time of travel of the sound wave.
In a further preferred embodiment, the sensor head is mounted within the actuator housing, preferably on or at least partially inside the actuator housing wall. The actuator housing provides a stable base for the sensor device. The sensor means, preferably the sensor head, may be located directly on the housing or on a stand at a distance from the housing. Preferably, the sensor device or the sensor head is mounted on an actuator housing wall oriented substantially perpendicularly to the direction of travel. The actuator housing includes an aperture configured to receive a cable wiring of the sensor device or an external component configured to connect to the sensor device.
In another preferred embodiment, the push rod comprises a reflective surface and the sensor means is positioned inside the actuator housing such that the emitter faces the reflective surface and the receiver receives the wave after reflection from the reflective surface. Preferably, the emitter is oriented such that the wave is emitted at an emission angle in the range of 0 ° -30 °, preferably at an angle in the range of 5 ° -10 °, relative to the central axis of the push rod. The waves are acoustic, light or radio waves. The waves may be pulsed or continuously emitted.
In another preferred embodiment, the sensor means comprises an ultrasonic sensor. Ultrasonic sensors operate by periodically emitting short high frequency sound waves through the air at the speed of sound. If the ultrasonic wave hits an object, it is reflected. The sensor device (e.g., a receiver of the sensor head) detects the resulting echo and calculates the distance to the target from the time interval between transmission and reception of the acoustic wave. The size of the proposed ultrasonic sensor is about 40x20x10mm.
In a further preferred embodiment, the sensor device is configured to generate a sensor signal, preferably an echo output signal, which is characteristic of the transmission time of sound waves from the transmitter to the receiver.
In a further preferred embodiment, the sensor device is configured to transmit the sensor signal to a processor unit, or the sensor device comprises a processor unit, wherein the processor unit is configured to determine the stroke position of the push rod based on the sensor signal from the sensor device. Preferably, the microprocessor code reads the transit time of the acoustic wave from the sensor means. The distance from the sensor device to the pushrod, preferably the piston plate of the pushrod, can be calculated using the following formula:
distance = speed of sound x transit time/2
Thus, this distance can be used to determine the stroke position of the push rod.
In another preferred embodiment, the processor unit is configured to send the encoded signal to a display to graphically display the travel position on the display. For the driver of the vehicle, this information may be useful information to better understand the braking force applied by the driver.
In a further preferred embodiment, the sensor device comprises a power supply and data output interface, wherein preferably the power supply and data output interface is arranged outside the actuator housing. In one embodiment, the power supply and/or data output interface is part of the sensor device. In other embodiments, the power supply and/or data output interface is an external component independent of the sensor device.
In another preferred embodiment, the data output interface is configured to connect with one or more external components, wherein the external components are selected from the group consisting of a processor, a data memory, a display. The external components may be an electronic control unit, a bus system, a microcontroller, an analog circuit. In one embodiment, the external component is part of the sensor. In other embodiments, the external component is a stand-alone component. External components are interconnected via a bus system. When connected, the data output interface provides signal communication between the sensor device and an external component.
In another preferred embodiment, the brake actuator includes a pressure chamber in the actuator housing, wherein the pressure chamber includes a variable volume configured to move the push rod from its retracted position toward its extended position. The pneumatic energy is converted to mechanical energy by moving the push rod. Thus, braking force can be generated. This produces a relationship between the stroke position and the corresponding braking force. A return spring is disposed within the actuator housing adjacent the push rod, the return spring configured to urge the push rod against a retracted position of the push rod.
In a further preferred embodiment, a membrane separates the pressure chamber from an unpressurized chamber in which the sensor device and the push rod are arranged. The piston plate abuts the membrane.
The invention has been described above with reference to a brake actuator in a first aspect of the invention. In a second aspect, however, the invention relates to a brake system for a vehicle, in particular a commercial vehicle. The brake system comprises a brake actuator according to one of the foregoing preferred embodiments and a brake mechanism operatively coupled to the brake actuator.
In another preferred embodiment, the brake system comprises an external component, wherein the external component is selected from the group consisting of a processor, a data storage, a display. The external components may be an electronic control unit, a bus system, a microcontroller, an analog circuit. The electronic control unit is operatively coupled to the brake actuator. A display is in communication with the electronic control unit.
In a third aspect, the invention relates to a method of monitoring the braking force of a brake actuator, preferably a brake actuator according to one of the preceding preferred embodiments. The method comprises the following steps: generating a braking command by an operator, preferably a braking command having a predetermined braking force; transmitting a brake command to a brake actuator; generating braking force according to the braking command; and monitoring a stroke position of a pushrod of the brake actuator with the sensor device, wherein the braking force is a function of the stroke position of the pushrod.
In a preferred embodiment, the method further comprises the steps of: the travel position is converted into a code signal, which is transmitted to a display, on which the code signal is visualized, preferably as braking force.
The advantages and preferred embodiments of the brake actuator of the first aspect are also the advantages and preferred embodiments of the brake system of the second aspect and the method of the third aspect. To avoid unnecessary repetition, reference is made herein to the description above.
For a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. The detailed description will illustrate and describe or be considered a preferred embodiment of the invention. It will, of course, be understood that various modifications and changes in form or detail could readily be made without departing from the scope of the invention. It is therefore intended that the invention may not be limited to the exact forms and details shown and described herein, nor to anything less than the entirety of the invention disclosed herein and claimed hereinafter. Furthermore, the features described in the description, the drawings and the claims disclosing the invention may be essential for the invention considered alone or in combination. In particular, any reference signs in the claims shall not be construed as limiting the scope of the invention. The word "comprising" does not exclude other elements or steps. The word "a" or "an" does not exclude a plurality.
In short, the drawings to be referred to show the following:
figure 1 shows a brake actuator comprising an integrated sensor device according to a preferred embodiment,
figure 2 shows a brake actuator according to figure 1,
fig. 3 shows a flow chart for monitoring the braking force of a brake actuator.
Fig. 1 and 2 illustrate a brake actuator 100 for a vehicle (not shown). The brake actuator 100 includes an actuator housing 110, a push rod 120, and a sensor arrangement 130.
The brake actuator 100 further includes a membrane 140 and a return spring 150.
The actuator housing 110 includes an actuator housing wall 112, a pressure chamber 114, and an unpressurized chamber 116. Pressure chamber 114 and unpressurized chamber 116 are located within actuator housing 110. The actuator housing wall 112 surrounds a pressure chamber 114 and an unpressurized chamber 116.
The push rod 120 is adapted to be coupled to a brake mechanism and to move in a reciprocating manner between a retracted position S1 and an extended position S2 (not shown), wherein the movement between the retracted position S1 and the extended position S2 defines a stroke S. The retracted position S1 is shown in fig. 1 and 2. The travel positions S1, S2 are exemplarily shown by arrows Sx in fig. 2.
The push rod 120 has a piston plate 122 and a piston rod 124. The push rod 120 is mounted within the actuator housing 110. The pushrod 120 is disposed within the unpressurized chamber 116. In this embodiment, the piston plate 122 also includes a reflective surface 126.
The pressure chamber 114 includes a variable volume configured to move the push rod 120 from its retracted position S1 toward its extended position S2.
The membrane 140 separates the pressure chamber 114 from the unpressurized chamber 116. For this purpose, the flexible membrane 140 adjoins the moving part of the push rod 120, i.e. the piston plate 122.
The sensor device 130 includes a sensor head 132. The sensor head 132 has a transmitter 134 and a receiver 136.
The sensor head 132 is mounted within the actuator housing 110. In this embodiment, the sensor head 132 is mounted on the actuator housing wall 112 or at least partially inside the actuator housing wall 112, for example within a recess in the actuator housing wall 112. The sensor head 132 is disposed within the unpressurized chamber 116.
Fig. 2 shows a preferred embodiment of the sensor device 130, wherein the sensor device 130 comprises an ultrasonic sensor 130'.
The sensor device 130 is configured to measure the stroke position Sx of the push rod 120 of the brake actuator 100. For this purpose, the sensor device 130 measures the position of the piston plate 122 within the movement of the piston plate. In this embodiment, the sensor device 130 measures the distance to the piston plate 122 relative to the position of the sensor device 130.
Fig. 2 shows an indicated travel position S x Wherein the piston plate 122 of the brake actuator 100 is shown in fig. 2 in the retracted position S1. When the piston plate 122 is from the retracted position S1, arrow S is followed x When the direction of (a) is shifted, a braking force is generated by the brake actuator 100. When the piston plate 122 is at the horizontal height S2, the piston plate 122 is disposed at the extended position S2.
The sensor device 130 is configured to generate a sensor signal, preferably an echo output signal, which is characteristic of the transmission time of the acoustic wave W from the transmitter 134 to the receiver 136.
The sensor device 130 is positioned inside the actuator housing 110 such that the emitter 134 faces the reflective surface 126 and the receiver 136 receives the wave W after reflection from the reflective surface 126.
FIG. 3 illustrates a flow chart for monitoring the braking force of the brake actuator 100.
The ultrasonic sensor 130' is placed inside the brake actuator 100. The ultrasonic sensor 130 'emits a signal, preferably an acoustic wave W, to the target via an emitter 134 of the ultrasonic sensor 130'. In this embodiment, the target is a piston plate 122. The piston plate 122 reflects the ultrasonic wave W through its reflecting surface 126, thereby transmitting a signal to the receiver 136 of the ultrasonic sensor 130'.
The sensor device 130 transmits a signal (preferably an echo output signal) to the processor unit 170 via the analog circuit 160. In this embodiment, the processor unit 170 is a microcontroller. The processor unit 170 is configured to determine the stroke position Sx of the push rod 120 based on the sensor signal from the sensor device 130.
The processor unit 170 sends the encoded signal to the display 180 to graphically display the stroke position Sx on the display 180. The display 180 is arranged in the vehicle so that a driver of the vehicle can view it (not shown).
The sensor device 130 further comprises a power interface unit 190. The power interface unit 190 is disposed outside the actuator housing 110.
The power interface unit 190 is connected to the microcontroller.
The brake system of the vehicle includes a brake actuator 100 and a brake mechanism operatively coupled to the brake actuator 100.
Then, the method of monitoring the braking force of the brake actuator 100 is performed by:
the operator is generating a brake command, preferably a brake command with a predetermined braking force (not shown). The brake command is then transmitted to the brake actuator 100.
For example, by means of the pressure built up in the pressure chamber 114, a pneumatic force is generated which moves the membrane 140 and thus the push rod 120 to the further stroke position Sx. This stroke S is transmitted to the brake mechanism by coupling the push rod 120 to the brake mechanism.
Thereby, a braking force is generated according to the braking command.
The sensor device 130 monitors a stroke position Sx of the push rod 120 of the brake actuator 100, wherein the braking force is a function of the stroke position Sx of the push rod 120.
The stroke position Sx is converted into an encoded signal by the processor unit 170. The processor unit 170 sends the encoded signal to the display 180. The display 180 preferably visualizes the coded signal on the display 180, preferably as braking force.
List of reference numerals (part of the description)
100. Brake actuator
110. Actuator housing
112. Actuator housing wall
114. Pressure chamber
116. Unpressurized chamber
120. Push rod
122. Piston plate
124. Piston rod
126. Reflective surface
130. Sensor device
130' ultrasonic sensor
132. Sensor head
134. Transmitter
136. Receiver with a receiver body
140. Film and method for producing the same
150. Reset spring
160. An analog circuit.
170. Processor unit
180. Display device
190. Power interface unit
S stroke
S1 retracted position
S2 extended position
Sx stroke position
W sound wave.
Claims (16)
1. A brake actuator (100) for a vehicle, in particular a commercial vehicle, the brake actuator (100) comprising:
-an actuator housing (110)
A push rod (120) mounted within the actuator housing (110), the push rod (120) being adapted to be coupled to a braking mechanism and to move in a reciprocating manner between a retracted position (S1) and an extended position (S2), wherein movement between the retracted position (S1) and the extended position (S2) defines a stroke (S),
it is characterized in that
The brake actuator (100) comprises a sensor device (130) for measuring a stroke position (Sx) of the push rod (120) of the brake actuator (100).
2. The brake actuator (100) according to claim 1,
wherein the push rod (120) comprises a piston plate (122) and a piston rod (124), and
wherein the sensor means (130) measures the position of the piston plate (122) within the movement of the piston plate, preferably the sensor means (130) measures the distance to the piston plate (122) relative to the position of the sensor means (130).
3. The brake actuator (100) according to claim 1 or 2,
wherein the sensor device (130) comprises a sensor head (132), the sensor head (132) comprising a transmitter (134) and a receiver (136).
4. The brake actuator (100) of claim 3,
wherein the sensor head (132) is mounted within the actuator housing (110), preferably on an actuator housing wall (112) or at least partially within the actuator housing wall (112).
5. The brake actuator (100) according to claim 3 or 4,
wherein the pushrod (120) includes a reflective surface (126), and
wherein the sensor device (130) is positioned inside the actuator housing (110) such that the emitter (134) faces the reflective surface (126) and the receiver (136) receives waves after reflection from the reflective surface (126).
6. Brake actuator (100) according to one of the preceding claims,
wherein the sensor device (130) comprises an ultrasonic sensor (130').
7. Brake actuator (100) according to one of the preceding claims,
wherein the sensor device (130) is configured to generate a sensor signal, preferably an echo output signal, having the characteristic of a transmission time of an acoustic wave (W) from the transmitter (134) to the receiver (136).
8. The brake actuator (100) of claim 7,
wherein the sensor device (130) is configured to transmit the sensor signal to a processor unit (170), or the sensor device (130) comprises a processor unit (170),
wherein the processor unit (170) is configured to determine a stroke position (Sx) of the push rod (120) based on the sensor signal from the sensor device (130).
9. The brake actuator (100) of claim 8,
wherein the processor unit (170) is configured to transmit an encoded signal to a display (180) to graphically display the travel position (S) on the display (180) x )。
10. Brake actuator (100) according to one of the preceding claims,
wherein the sensor device (130) comprises a power supply and a data output interface,
wherein preferably the power supply and the data output interface are arranged outside the actuator housing (110).
11. The brake actuator (100) of claim 10,
wherein the data output interface is configured to connect with one or more external components,
wherein the external component is selected from the group consisting of a processor, a data storage, a display (180).
12. Brake actuator (100) according to one of the preceding claims,
wherein the brake actuator (100) comprises a pressure chamber (114) in the actuator housing (110),
wherein the pressure chamber (114) comprises a variable volume configured to move the push rod (120) from its retracted position (S1) towards its extended position (S2).
13. The brake actuator (100) of claim 12,
wherein a membrane (140) separates the pressure chamber (114) from the unpressurized chamber (116),
wherein the sensor device (130) and the push rod (120) are arranged in the unpressurized chamber (116).
14. A brake system for a vehicle, in particular a commercial vehicle, comprising
Brake actuator (100)
A brake mechanism operatively coupled to the brake actuator (100),
the method is characterized in that:
the brake actuator (100) according to any of the preceding claims.
15. Method of monitoring a braking force of a brake actuator (100), the brake actuator (100) preferably being a brake actuator (100) according to one of claims 1-13, the method comprising the steps of:
generating a brake command, preferably a brake command with a predetermined braking force, by an operator, transmitting the brake command to the brake actuator (100),
-generating a braking force according to a braking command, and
-monitoring the stroke position (S) of the push rod (120) of the brake actuator (100) with a sensor device (130) x )，
Wherein the braking force is the stroke position (S) of the push rod (120) x ) Is a function of (2).
16. The method of claim 15, wherein the method further comprises the steps of:
-comparing the travel position (S x ) Is converted into a coded signal which is then converted into a coded signal,
transmitting the encoded signal to a display (180),
-visualizing the coded signal on the display (180), preferably as braking force.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2021/057435 WO2023017298A1 (en) | 2021-08-12 | 2021-08-12 | A brake actuator for a vehicle, brake system of a vehicle and a method of monitoring a braking force of a brake actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117794799A true CN117794799A (en) | 2024-03-29 |
Family
ID=78078292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180101153.3A Pending CN117794799A (en) | 2021-08-12 | 2021-08-12 | Brake actuator for a vehicle, brake system for a vehicle and method of monitoring the braking force of a brake actuator |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4384428A1 (en) |
| CN (1) | CN117794799A (en) |
| WO (1) | WO2023017298A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6888451B1 (en) * | 2003-03-31 | 2005-05-03 | Indian Head Industries, Inc. | Method of monitoring the power spring of a spring brake actuator |
| US20140200761A1 (en) * | 2013-01-16 | 2014-07-17 | Bendix Commercial Vehicle Systems Llc | Brake chamber with sensor |
| DE102015105349B4 (en) * | 2015-04-09 | 2020-03-05 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Brake cylinder of a motor vehicle |
| DE102020113523A1 (en) * | 2020-05-19 | 2021-11-25 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Housing device for a braking device for a vehicle, tappet for a braking device, braking device with a housing device and a tappet and method for operating a braking device |
-
2021
- 2021-08-12 WO PCT/IB2021/057435 patent/WO2023017298A1/en active Application Filing
- 2021-08-12 EP EP21786561.7A patent/EP4384428A1/en active Pending
- 2021-08-12 CN CN202180101153.3A patent/CN117794799A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023017298A1 (en) | 2023-02-16 |
| EP4384428A1 (en) | 2024-06-19 |
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