DE19861222B4 - Compressed air supply unit for vehicle compressed air system multi-circuit protection valve with compressor and control and-or electronic regulation unit - Google Patents

Abstract

The control and-or electronic regulating unit controls or regulates at least indirectly a switch element (1a) switching the compressor (1) is a pneumatically switched compressor. The supply line (18) is arranged between the electro-pneumatic pressure regulator (4) and the multi-circuit protection valve (13-16).

Description

The The invention relates to a compressed air supply device for vehicle compressed air systems and a method for saving energy in compressed air treatment plants especially in vehicle compressed air systems.

Such compressed air supply facilities for vehicle compressed air systems are from the DE 195 15 895 A1 known. This document discloses an air compressor, from the output for supplying the compressed air system leads a delivery line to an air dryer. The delivery line is branched on the output side of the air dryer in leading to at least two load circuits line branches. The pressure in the consumer circuits can be monitored by pressure sensors. In addition, control electronics are provided to which the pressure sensors are connected. The consumer circuits can be separated from the compressed air supply by a switchable from the programmable control electronics, lying in the respective delivery line branch of the locking member. As a result, the supply of compressed air in the consumer circuits and the removal of compressed air for the transfer of a circuit in the other of the control electronics can be controlled. In such generic compressed air supply devices branch off all circuits of the multi-circuit protection valve from a central supply hole to allow any filling order and a sequential air exchange between the circuits.

Out However, this document is not inferred that and on which Way modern energy-saving switching compressors are operated can. Such energy-saving compressors are by means of an internal or external pneumatic, electromagnetic or electromechanical Actuator switched. These actuators allow switching losses to minimize. In this case, the control is time-critical, since the switching process must take place in certain piston positions.

From the EP 0 119 505 A1 is a compressed air system of vehicles, in particular a compressed air brake system is known, in which the regulation of the pressure level via a plurality of switching valves and switches and a switchable to the compressor pressure chamber switching room is performed. In this way, according to the respective operating conditions of the vehicle energy for compressed air procurement is saved, namely the fact that the filling of the system is primarily relocated to those phases in which the drive energy required for the compressor not the vehicle engine but by the kinetic energy of the vehicle, eg , B. when driving downhill, is branched off.

It is therefore an object of the present invention, a compressed air supply device specify with the control of energy-saving compressors possible is and with which energy is saved during operation. It is also a task the present invention, a compressed air supply device specify, which can be produced in a compact and simple design. It is another object of the present invention, as possible simple procedure for saving energy in compressed air treatment plants specify.

Be solved These objects by the features of claims 1 and 7. Further developments of the invention are the subject of the dependent claims.

According to the invention a compressed air supply device for vehicle compressed air systems Multi-circuit protection valve, a pressure regulator, a supply line for supplying the circuits of the multi-circuit protection valve with compressed air, and a compressor, wherein a control and / or regulating electronics provided is that a compressor switching switching element at least indirectly controls or regulates, wherein the supply line to the pressure regulator connects to the multi-circuit protection valve, wherein the switching member the Compressor immediately switches, the switching element is a pneumatic Switching member is, wherein the pressure regulator comprises a solenoid valve, the a pneumatic pilot valve switches, the pneumatic Pilot valve controls the switching element directly. Through this inventive design is guaranteed that in particular energy-saving compressors, in particular switching compressors can be operated.

A compact and easy to install construction is then preferred possible, if the connecting line a ventilation hole and in particular a central ventilation hole is. Preferably, the vehicle compressed air system is electromechanical. Preferably, the pressure regulator and the multi-circuit protection valve housed in a unit. This unit can in particular preferably also contain the compressor. Preferably, the Electro-pneumatic pressure regulator. Preferably, the multi-circuit protection valve electro. Further preferably, the multi-circuit protection valve a four-circuit protection valve.

If Preferably, at least one pressure sensor is provided, the Control or regulation in dependence or taking into account certain pressures prevailing in the compressed air supply device happen. If preferably a pressure sensor for measuring the pressure in the connecting line is provided, a meaningful control or regulation of the Compressor done by means of only one pressure sensor.

If preferably between the pressure regulator and the connecting line and in particular the pressure sensor for measuring the pressure in the connection line a check valve, in particular a check valve provided is, is a safe operation of the compressed air supply device possible. If preferably pressure in or behind each circuit of the multi-circuit protection valve is measurable by pressure sensors is, except the regulation or control of Compressor also the supply of compressed air in the consumer circuits and the removal of compressed air for the transfer of a circle in the other controllable or adjustable.

Thereby, that the switching element is a pneumatic switching element, the Switching the compressor by allowing essentially pneumatic means so that little electronic components are needed. This is according to the invention pneumatic switching element directly by means of a pilot valve controllable.

The Switching element may be an electromagnetic switching element, so that an electronic control or regulation is possible.

If the leading to the electromagnetic switching element electronic line a CAN line is, can additional Functions are switched on this line, such as vehicle control functions or the diesel injection. CAN is usually known and is coming from the English term Controller Area Network and is a special one for the Car use designed serial bus system. See, for example, "Automotive Paperback ", Robert Bosch GmbH, 22nd edition, 1995, page 800 ff.

It can be between the control and / or regulating electronics and the electromagnetic Switching element arranged a further control and / or regulating electronics be able to perform further control and / or regulation functions. In the context of this invention, the term tax and / or Control electronics, in particular a control device, a control device, a control unit and a control device.

Preferably is a compressed air system provided with a prescribed compressed air supply unit.

• – Messen eines in einer Verbindungsleitung, die zwischen einem Druckregler und einem Mehrkreisschutzventil angeordnet ist, herrschenden Drucks und/oder Messen der in oder hinter den Kreisen eines Mehrkreisschutzventils herrschenden Drücke,
• – Vergleichen des gemessenen Drucks oder der gemessenen Drücke mit vorgebbaren Schwellwerten, und
• – Betätigen eines Schaltglieds, das einen Kompressor unmittelbar schaltet, derart, dass der Kompressor bei Unterschreiten des oder der Schwellwerte Druckluft in die Druckluftversorgungseinrichtung fördert und bei Überschreiten des oder der Schwellwerte Druckluft nicht in die Druckluftversorgungseinrichtung fördert, wobei das Schalten zeitlich auf die Kolbenposition des Kompressors (1) abgestimmt ist.

According to the invention, a method for saving energy in compressed air treatment systems, in particular in vehicle compressed air systems, comprises the following method steps:

• Measuring a pressure prevailing in a connecting line, which is arranged between a pressure regulator and a multi-circuit protection valve, and / or measuring the pressures prevailing in or behind the circuits of a multi-circuit protection valve,
• Comparing the measured pressure or the measured pressures with predefinable threshold values, and
• - Actuating a switching element that directly switches a compressor, such that the compressor promotes compressed air in the compressed air supply device falls below the threshold or the value and does not promote in the compressed air supply device when exceeding the thresholds or the compressed air, wherein the switching in time to the piston position of the compressor ( 1 ) is tuned.

By this method according to the invention is Energy saving by meaningful switching of the compressor and in particular a shift compressor possible. Through this switching or switching on and off it is possible for the compressor between funding and non-promotion phase can be. Due to the fact that the timing changes to the piston position the compressor is tuned, this can at the preferred time each one or can be turned off.

Preferably Switching happens electromagnetically.

Preferably switching happens pneumatically.

It become energy-saving compressors for vehicle compressed air systems used. Are useful the energy-saving compressors switching compressors.

It become energy-saving compressors for compressed air supply equipment used the aforementioned type.

The Invention will be described below without limiting the general inventive concept of exemplary embodiments with reference to the drawings described by way of example the rest in terms of the disclosure of all unspecified in the text details of the invention expressly is referenced. Show it:

1 an embodiment of the invention with pneumatic pilot valve in a schematic representation,

2 a further embodiment with electromagnetic actuator in a schematic representation, and

3 a part of an embodiment in a schematic representation in which the use ei nes serial data transmission system such as the CAN is possible.

In The following figures are each the same or corresponding parts denoted by the same reference numerals, so that a renewed Presentation is omitted and only the deviations in These embodiments illustrated with respect to the first embodiment are explained:

1 shows an inventive embodiment of a compressed air supply device for vehicle compressed air systems. The compressed air supply device comprises an air dryer cartridge 5 and a common housing 20 , An energy-saving compressor 1 is via a compressor line 2 with an inlet neck 3 attached to the common housing. In the common housing are also an electropneumatic pressure regulator 4 and a four-circuit protection valve arranged. The air pressures coming from the four-circuit protection valve are from the individual pressure control units or circuits 13 to 16 via corresponding connecting pieces 13a to 16a to containers for the respective circles 21 and 22 directed. In this embodiment, only two of the four containers are shown.

The from the energy-saving compressor 1 conveyed compressed air is via a compressor line 2 to the entrance neck 3 supplied to the compressed air supply device. In the context of this invention, compressed air supply means means a device which both a compressor 1 , the compressor line 2 and the inlet neck 3 includes, as well as one of these components in one of the common housing 20 includes and also a device in which the compressor is connectable by means of a line to the housing. From the entrance neck 3 compressed air is the electropneumatic pressure regulator 4 and then through the air dryer cartridge 5 guided. Downstream is a check valve 6 , starting from which a central supply bore 18 is continued. From the central compressed air supply hole 18 become the electro-mechanical pressure control units 13 to 16 supplied with compressed air. The pressure control units are controlled by the common control electronics 24 controlled and give the compressed air via the associated connecting piece 11a to 16a to compressed air circuits of the vehicle and that according to adjustable and / or pre-programmable parameters.

Reaches the pressure through the pressure sensor 12 behind the check valve 6 is measured, the upper threshold, so switches the common control electronics 24 the signal line 26 such that the pneumatic control line 10a over the connection 10 is vented, causing the pneumatic actuator 1a switches over and the compressor stops promoting. This is done by means of control or regulation of a pneumatic pilot valve 7 via a control bore 9 wherein the pilot valve via the pilot valve supply line 17 is supplied with compressed air. The measured value of the measured pressure is via the electrical connection 25 to the control electronics 24 directed.

If the pressure in the line falls 18 behind the check valve 6 by, for example, air extraction such as when braking the vehicle below a lower threshold, so is by the common control electronics 24 over the signal line 26 an inverting of the solenoid valve 23 caused, whereby the pneumatic pilot valve is switched such that the pneumatic control line 10a is vented. Preferably, this control line 10a quickly vented. This will cause the pneumatic actuator 1a moved back to its original position and the compressor starts to promote again.

The venting of the control line 10a Preferably takes place via the venting of the pilot valve 8th and / or via the central vent 19 ,

2 shows a further embodiment of a pressure supply device, in which instead of the pneumatic actuator 1a an electromagnetic actuator 28 is used. The electromagnetic actuator is connected via a line 27 to the electrical connection 10b and an electrical line 26 connected to the common control electronics. Upon reaching the respective pressures in the central supply bore 18 behind the check valve 6 is on the electrical or electronic line 27 a signal is applied, which is the electromagnetic actuator 28 either activated or deactivated, depending on the pressure measured. This will then switch the compressor to conveying or not conveying.

As well in 2 and 1 is an overflow valve 11 shown for the air suspension from the central supply bore 18 be supplied with compressed air and compressed air the connecting piece 11a submit.

3 shows a further version of the embodiment of 2 , where the electronic wire 27 is designed as a CAN connection line. This leads from the connection 10b to a control unit 30 , which can additionally control and / or regulate functions. This is intended, for example, to a diesel injection or to vehicle control functions. Unless the controller 30 the command to activate the electromagnetic actuator 28 gets the lead 31 powered. Here through is the electromagnetic actuator 28 activated.

1

Energy-saving compressor

1a

pneumatic actuator

2

compressor line

3

inlet connection

4

electro pressure regulator

5

Air dryer cartridge

6

check valve

7

pneumatic pilot valve

8th

Venting the pilot valve

9

control bore

10

connection

10a

pneumatic control line

10b

electronic or electrical connection

11

overflow for air suspension

11a

spigot for air suspension

12

pressure sensor

13

electromechanical pressure control unit for circuit 1

13a

Connecting piece for 13

14

electromechanical pressure control unit for circuit 2

14a

Connecting piece for 14

15

electromechanical pressure control unit for circuit 3

15a

Connecting piece for 15

16

electromechanical pressure control unit for circuit 4

16a

Connecting piece for 16

17

Pilot valve supply line

18

central supply hole

19

Central venting

20

common casing

21

Container for circle 1

22

Container for circle 2

23

magnetic valve

24

common control electronics

25

electrical Connection to the pressure sensor

26

electrical or electronic control line

27

electrical or electronic control line

28

electromagnetic actuator

29

additional control unit

30

switching line

31

electrical management

35

pressure sensor

36

pressure sensor

37

pressure sensor

38

pressure sensor

Claims (7)

Compressed air supply device for vehicle compressed air systems comprising a multi-circuit protection valve ( 13 - 16 ), a pressure regulator ( 4 ), a supply line ( 18 ) for supplying the circuits of the multi-circuit protection valve ( 13 - 16 ) with compressed air, and a compressor ( 1 ), wherein a control and / or regulating electronics ( 24 ), which is a compressor ( 1 ) switching switching element ( 1a . 28 ) controls or regulates, at least indirectly, the supply line ( 18 ) the pressure regulator ( 4 ) with the multi-circuit protection valve ( 13 - 16 ), wherein the switching element ( 1a ) the compressor ( 1 ), whereby the switching element ( 1a ) is a pneumatic switching element, wherein the pressure regulator ( 4 ) a solenoid valve ( 23 ) comprising a pneumatic pilot valve ( 7 ), wherein the pneumatic pilot valve ( 7 ) the switching element ( 1a ) directly controls. Compressed air supply device according to claim 1, characterized in that the compressor ( 1 ) is an energy-saving compressor. Compressed air supply device according to claim 1 or 2, characterized in that at least one pressure sensor ( 12 . 35 - 38 ) is provided. Compressed air supply device according to claim 3, characterized in that a pressure sensor ( 12 ) for measuring the pressure in the connecting line ( 18 ) is provided. Compressed air supply device according to claim 4, characterized in that between the pressure regulator ( 4 ) and the connection line ( 18 ) and in particular the pressure sensor ( 12 ) for measuring the pressure in the connecting line a check valve ( 6 ), in particular a check valve, is provided. Compressed air supply device according to one or more of claims 3 to 5, characterized in that the pressure in or behind each circuit of the multi-circuit protection valve ( 13 - 16 ) by means of pressure sensors ( 38 ) is measurable. Method for saving energy in compressed air treatment plants, in particular in vehicle compressed air systems, comprising the following process steps: measuring one in a connecting line ( 18 ) between a pressure regulator ( 4 ) and a multi-circuit protection valve ( 13 - 16 ), prevailing pressure and / or measuring of the in or behind the circuits of a multi-circuit protection valve ( 13 - 16 ) prevailing pressures, - comparing the measured pressure or the measured pressures with predefinable threshold values, and - actuating a switching element ( 1a . 28 ), which is a compressor ( 1 ), such that the compressor ( 1 ) promotes compressed air in the compressed air supply device falls below the thresholds or the compressed air and when exceeding the threshold or the value of compressed air not in the Druckluftver ver supply, whereby the switching in time to the piston position of the compressor ( 1 ) is tuned.