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CN-114248738-B - Compressed air device for trailer

CN114248738BCN 114248738 BCN114248738 BCN 114248738BCN-114248738-B

Abstract

The invention relates to a compressed air device (125) for a trailer of a commercial vehicle. In a compressed air device (125), a parking valve (10) has two actuators (109, 110). The electric actuation of the parking valve (10) can be achieved (in addition to the manual actuation of the parking valve (10)) by means of an actuator (109, 110). Additional functions, such as a non-motorized function, an emergency braking function-override function and/or a parking safety function, can thereby be ensured.

Inventors

  • S. Hale

Assignees

  • 哈尔德克斯制动产品股份公司

Dates

Publication Date
20260508
Application Date
20210910
Priority Date
20200911

Claims (14)

  1. 1. A compressed air device (125) for a trailer of a commercial vehicle, comprising: a) A parking valve (10) having: aa) a parking brake joint (22), and Ab) a parking position in which the parking brake adapter (22) is deflated, and Ac) a release position in which the parking brake adapter (22) is inflated, and Ad) at least one manual actuating element, by means of which the parking valve (10) can be actuated manually: -switching from the parking position into the release position, and -Switching from the release position into the park position, and Ae) an electrically actuable first actuator (109) which switches the parking valve (10) from the parking position into the release position and/or holds it in the release position, and Af) an electrically actuable second actuator (110) which switches the parking valve (10) from the release position into the parking position and/or remains in the parking position; b) An electronic control unit (23; 105) with control logic, which Ba) checking the qualification for the trailer driving and performing a non-motorized function in the absence of the qualification by actuating the second actuator (110) to switch the parking valve (10) from the release position into the parking position or to remain in the parking position, and/or Bb) checking whether an emergency braking criterion is present and, if so, performing an emergency braking function by actuating the second actuator (110) in such a way that the parking valve (10) is switched from the release position into the parking position or is held in the parking position, and/or Bc) checking whether an emergency braking criterion is present and whether a pressure above a threshold value for a service brake is present in a storage container (9) and implementing an emergency braking function-override function if an emergency braking criterion is present and if the pressure is above the threshold value, by not actuating the second actuator (110) such that the parking valve (10) is switched from the release position into the parking position or held in the parking position, and/or by actuating the first actuator (109) such that the parking valve (10) is switched from the parking position into the release position or held in the release position, and/or Bd) checks whether a parking situation exists and, if a parking situation exists, actuates the second actuator (110) in order to implement a parking safety function by switching the parking valve (10) from the release position into the parking position and/or holding it in the parking position.
  2. 2. The compressed air device (125) according to claim 1, wherein, A) The parking valve (10) and/or the control valve (11) and/or the lifting valve device (66) and/or the level control valve device (84) and/or the lifting shaft valve device (90) and/or the pressure sensor (61; 63) and/or the overflow valve (53) and/or the trailer brake valve (101) are integrated into one valve device (4), and B) The valve device (4) is designed as a structural unit (5).
  3. 3. The compressed air device (125) according to claim 2, wherein the electronic control unit (105) is part of a valve device (4) or part of a structural unit (5) constituted by the valve device.
  4. 4. Compressed air device (125) according to claim 2, characterized in that the electronic control unit is configured as an EBS control unit (23) and the parking valve (10) or the valve device (4) has an electrical control joint (46) by means of which the EBS control unit (23) controls the first actuator (109) and/or the second actuator (110).
  5. 5. Compressed air device (125) according to claim 2, characterized in that the electronic control unit (23, 105) or one EBS control unit A) Is connected to the coupling head brake (3) by bypassing the valve device (4), and B) Is connected to a parking brake connection (22) of the parking valve (10).
  6. 6. The compressed air device (125) according to claim 5, wherein, A) The second actuator (110) has a pressure chamber (39) which is acted upon by the pressure on the supply connection (6) and has a spring-loaded piston (36) which delimits the pressure chamber (39); b) The piston (36) is coupled to a plunger (37) which forms a mechanical drive connection with a valve element of the parking valve (10) for switching the parking valve (10) from the release position into the parking position.
  7. 7. The compressed air device (125) according to claim 6, wherein, A) The pressure chamber (39) can be connected to the supply connection (6) via an electric emergency brake function-override valve (44), and B) An emergency braking function is implemented when the pressure at the supply connection (6) drops, in that the emergency braking function override valve (44) connects the pressure chamber (39) to the storage container (9).
  8. 8. Compressed air device (125) according to claim 6, characterized in that an electric emergency braking function-override valve (44) connects a control connection (49) of the parking valve (10) with a storage container (9) in an override position, whereby the parking valve (10) is switched into the release position or the parking valve (10) is held in the release position without switching the parking valve (10) into the parking position by an emergency braking function.
  9. 9. The compressed air device (125) according to claim 8, wherein the second actuator (110) has a non-motorized valve (57) that A) Front or rear of the parking valve (10), and B) Has a non-motorized operating position in which no flow from the parking valve (10) to the EBS control unit (23) or one EBS control unit is possible, but a flow from the EBS control unit (23) to the parking valve (10) is possible, and C) Has a motorised operating position in which not only a flow from the parking valve (10) to the EBS control unit (23) but also a flow from the EBS control unit (23) to the parking valve (10) is enabled.
  10. 10. The compressed air device (125) according to claim 9, wherein the non-motorized valve (57) occupies or maintains the motorized operating position if the pressure in a parking brake line (107) leading to the EBS control unit (23) exceeds a threshold value.
  11. 11. Compressed air device (125) according to claim 9 or 10, characterized in that the non-motorized valve (57) is pre-controlled electropneumatically by a pre-control valve (103), wherein the pre-control valve (103) is configured as an emergency braking function-override valve (44).
  12. 12. The compressed air device (125) according to claim 11, wherein the pneumatic control joint (59/60) of the non-motorized valve (57) is instead A) Can be connected to the pre-control valve (103) or to the emergency brake valve-override valve (44), and B) Can be connected to a parking brake line (107).
  13. 13. The compressed air device (125) according to claim 12, wherein the first actuator (109) has a multifunctional emergency brake function-override valve (44) which controls both an emergency brake valve-override function of one of the lift valve devices or the lift valve device (66) and a reset to a driving function of one of the lift valve devices or the lift valve device (66).
  14. 14. Compressed air device (125) according to claim 13, characterized in that the valve device (4) has A) Wireless transmitting and/or receiving device (106), and/or B) Input and/or output means (124).

Description

Compressed air device for trailer Technical Field The invention relates to a compressed air device for a trailer of a commercial vehicle. In this case, the compressed air device for the trailer is only present in the parking valve which is configured as a structural unit. Furthermore, it is possible for the compressed air device to be a structural unit which, in addition to the parking valve, also has a regulating valve, or for the compressed air device to be a valve device embodied as a structural unit, in which at least one further structural element is integrated. However, it is also possible for the compressed air device to be a commercial vehicle trailer compressed air system which has a plurality of mutually communicating structural elements and/or structural units and can, for example, have a parking valve and an EBS control unit, optionally at least an air spring system and/or a further structural element of the load circuit, and can even have a connection to a coupling head reservoir and/or to a coupling head brake and/or a spring energy reservoir brake, a service brake or a combination brake cylinder. In these various embodiments, the structural units may have a common housing, or the structural elements of the structural units are configured as submodules, which are then fastened directly to one another (in particular flanged) to form a total module, which then forms the structural unit. Background Document DE 10 2017 118 529 B4 describes a trailer brake control unit, which is designed as a structural unit. Integrated into this unit is an electronically controlled modulator-valve device for generating a service brake pressure modulated in order to avoid wheel locking, and then applying the service brake pressure to the service brake of the trailer. Furthermore, a spring brake valve device is integrated in the structural unit, which generates a spring brake pressure determined for the spring brake. The spring accumulator brake pressure is in this case dependent on the brake control pressure, the reservoir line pressure, the electronic actuation and the pneumatic or electrical signal predefined by the user. On the one hand, the modulated service brake pressure produced by the modulator valve device and the spring accumulator brake pressure produced by the spring accumulator brake valve device are each supplied to the input of an Anti-mixing valve (Anti-Compound-Ventil) embodied as a reversing valve, the output of which is connected to the spring accumulator brake cylinder of the trailer. Document DE 10 2017 118 529 B4 proposes that the spring brake function should be implemented by means of a spring brake valve device. For example, the following spring energy store braking function is mentioned here: The spring energy store brake function may be a parking function, by means of which a user can optionally actuate and release the parking brake via the spring energy store brake. The user can control the parking function, for example, by means of a manually actuated valve element (Ventilschieber), which can directly initiate the parking function or initiate a pre-control. It is also possible that the user controls the parking function via an electrical signal generator, such as an electrical switch, or via a smart phone. Furthermore, the spring accumulator braking function may be a release or dispatch function. This is understood to mean that the spring energy store brake is inflated as a result of a user-defined setting. By means of the release or dispatching function, the trailer brake control unit can be supplied with compressed air if there is no pressure on the supply connection of the trailer brake control unit, which is the case in particular for a detached trailer, in order to be able to effect dispatching of the trailer. The presetting by the user can be carried out by actuating the valve element or by actuating an electrical signal generator, such as an electrical switch. The spring accumulator brake function may be an automatic parking brake release function. The parking brake release function is understood here to mean the automatic charging of the spring energy store brake by the electronic control unit, with which the trailer is ready for an upcoming or already started driving operation with a driving speed increased from zero. The parking brake release function is particularly useful when the driver forgets to manually release the spring accumulator brake of the trailer at the start of driving. The spring accumulator brake function may be an "anti-freewheeling function" in which if the electronic control unit detects that the drive train of the tractor is in freewheeling, the spring accumulator brake is automatically actuated by the electronic control unit so that a braking action is produced on the tractor by the drive train without the user having to actuate the service brake or the spring accumulator brake. By means of the freewheeling prevention function, the trailer can be prevented