WO1994007726A1 - Systeme de regeneration de secheurs d'air pour compresseurs - Google Patents

Systeme de regeneration de secheurs d'air pour compresseurs Download PDF

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Publication number
WO1994007726A1
WO1994007726A1 PCT/HU1993/000049 HU9300049W WO9407726A1 WO 1994007726 A1 WO1994007726 A1 WO 1994007726A1 HU 9300049 W HU9300049 W HU 9300049W WO 9407726 A1 WO9407726 A1 WO 9407726A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
regeneration
air dryer
valve
solenoid valve
Prior art date
Application number
PCT/HU1993/000049
Other languages
German (de)
English (en)
Inventor
Tibor Gergely
Péter TATAI
Original Assignee
Tibor Gergely
Tatai Peter
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tibor Gergely, Tatai Peter filed Critical Tibor Gergely
Publication of WO1994007726A1 publication Critical patent/WO1994007726A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • 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
    • B60T17/002—Air treatment devices
    • B60T17/004—Draining and drying devices

Definitions

  • the invention relates to an air dryer regeneration system for compressors, in particular for use in compressed air systems in motor vehicles, which system includes a valve system regenerating the air dryer in countercurrent and a state sensor switch which controls the valve system and is arranged in the pressure line system or in the air tank system.
  • the filter insert of air dryers is a granulate that works as a molecular filter and binds the moisture content of the air flowing through it on its surface.
  • the moisture set on the surface of the granules can be removed from the granules by flowing dry air through them, so that the filter insert of the air dryer can be regenerated. Without regeneration, the air dryer would quickly become saturated with moisture, the consequence of which would be that moist air gets into the air container system, which would cause precipitation, corrosion and operational malfunctions in the compressed air system, especially in cold weather.
  • the oil pollution from the compressor gradually reduces the active surface of the granulate, so it is necessary to replace the granulate from time to time. Such granules contaminated with oil cannot be regenerated, so the regeneration cycles become ineffective in the event of contamination.
  • the air dryer should be regularly regenerated, which in the case of single-chamber air dryers can be done by periodically returning part of the relatively dry air that is conveyed into the container system through the air dryer.
  • the volume of the regeneration air tank is 5 to 10 liters for gravity vehicles, of which 7 to 10 bar of compressed air is completely emptied into the open in a regeneration cycle.
  • the backflow takes place in the solutions used in practice with the switch-operated pneumatic pressure controller controlled in such a way that when the pressure in the air tank system reaches an upper limit value, the air stored in the regeneration air tank empties into the open through the granulate and the regenerating valve system, while drying the granules.
  • the deficiency of the regeneration controlled by the pressure regulator is that it does not adapt to the actual regeneration requirement: on the one hand there are regeneration cycles in the full operating time of the compressor, regardless of how much moisture the compressed air flowing over the air dryer contains, on the other hand the reduction The drying capacity of the granules due to contamination is not taken into account. As a result, the regeneration cycles are repeated even if the air dryer is ineffective, which causes oil-contaminated air to get into the environment. Both situations are associated with significant useless power consumption.
  • the regeneration requirement of the air dryer depends on the moisture content of the air drawn in, on the amount of air used and on the state of pollution of the air dryer.
  • the regeneration controlled by means of a pressure regulator is not able to follow the subsequent changes in claims regarding regeneration.
  • the solution according to HU-PS 201 705 achieves the remedy of this last-mentioned deficiency, the task being carried out with a two-stage visual indicator built into the outlet of a humidity sensor switched into the air dryer outlet, e.g. is solved with a red and green indicator lamp.
  • a red and green indicator lamp As long as the compressor presses compressed air with a correspondingly low moisture content into the container system, the green lamp lights up continuously. If the air dryer allows compressed air with a moisture content higher than specified, the display switches to red. If the red light does not even switch to green after the regeneration, it is pointed out that the filter insert is dirty, ie it can no longer be regenerated.
  • the aim of our invention is to remedy the deficiency of the known solutions, namely with the formation of an air dryer regeneration system, which can also be used during the filling operating state of the compressor for the corresponding control of the actual regeneration requirements of the regeneration cycles.
  • Another objective is to design the system in this way, which enables the assessment of the reduction in the regenerability of the air dryer, the degree of dirt in the air dryer, and the improvement of the regenerability of the air dryer by means of extraordinary regenerations.
  • the air dryer regeneration system has an air dryer valve system which connects the air dryer to a regeneration air container and which regenerates the air dryer in countercurrent and which controls the air dryer valve system in the pressure line or in the Conditioner switch arranged in the air tank system has - a condition sensor switch, which is a moisture content threshold value detector, which threshold value detector is connected to the electrical control input of a solenoid valve of the air dryer valve system - by a valve control unit determining the switch-on period - and with increasing If the air dryer exceeds a threshold value, the moisture content is connected to the regeneration air tank independently of other factors.
  • a visually indicating condition sensor is also advantageously connected to the moisture content threshold value detector.
  • a hand-controlled switch is also expediently connected to the valve control unit of the solenoid valve.
  • the moisture content threshold is advantageously we ⁇ tdetektor from one, on output of the sensor a: jeelleen Messumwandler from a device connected to its output, the measured value compared with the threshold comparison circuit and a circuit comparison at the output of the connected, the solenoid valve controlling monostable tilt functions, wherein A status-indicating light source of a status indicator is also connected to two push-pull outputs of the comparison circuit.
  • the control input of two solenoid valves is connected to the moisture content threshold value detector, where the regeneration air container is kept connected to the air container system when the first solenoid valve is switched off, and the regeneration air container is connected to the second solenoid valve when the first solenoid valve is switched on with the regeneration air tank being connected to the control connection of the relay valve when the second solenoid valve is switched on, the control connection of the relay valve is connected to the vent which is open to the outside when the second solenoid valve is switched off and is open to the outside.
  • Venting of the second solenoid valve is connected, and the air dryer valve system is connected to the switched energy inflow of the relay valve of the regeneration air tank, to the energy outflow of the relay valve through a check valve.
  • control connection of the air dryer is opened to the outside when the solenoid valve is switched off, and the control connection of the air dryer is kept connected to the regeneration air container in its switched-on state.
  • FIG. 1 shows the block diagram of the filling system of a compressed air system with a single-chamber air dryer and a separate pressure regulator
  • FIG. 2 shows the block diagram of the filling system of a compressed air system with a single-chamber air dryer and integrated pressure regulator
  • FIG. 3 the block diagram of the filling system of a compressed air system with a single-chamber air dryer with an integrated pressure regulator and with a relay valve.
  • Fig. 4 the block diagram of the regeneration-controlling electronic unit.
  • the filling system 1 shows the block diagram of a compressed air system consisting of filling system 1 and air tank system 2.
  • the filling system 1 consists of a compressor 3, a pressure regulator 4 switched on in its filling line 22 and a single-chamber air dryer 5, which air dryer is provided with a regeneration system.
  • a line section 24 of the filling system 1 is connected to the energy inlet connection of a four-circuit protection valve 80 of the air container system 2, the outlet connections of the protection valve being connected to an air container 90, 90 'each.
  • the pressure connection of the compressor 3 is with the energy inflow 41 of a known and proven in practice Pressure regulator 4 connected, and the energy inflow 51 of the air dryer 5 is connected to the energy outlet 421 of the pressure regulator 4.
  • the compressed air is returned from the energy outlet 521 of the air dryer 5 connected to the protective valve 80 to the control connection 44 of the pressure regulator 4.
  • the vent 43 of the pressure regulator 4 is open to the outside in the basic state of the valve system, the connection 423 of the pressure regulator is blocked.
  • a humidity sensor 15 of the air dryer regeneration system is arranged in an outlet line of the protection valve 80.
  • the output of the humidity sensor 15 is connected to the input of the regeneration-controlling electronic unit 20, which unit 20 controls a solenoid valve 8.
  • a regeneration air tank 7 also forms part of the air dryer regeneration system.
  • the volume of the regeneration air tank 7 in city buses and gravity vehicles is five to ten liters, of which the 7 to 10 bar compressed air is completely emptied into the open in one regeneration cycle.
  • Solenoid valves 3/2 of the opening type are used uniformly in the examples, with connections such as energy inflow, energy outflow and ventilation, where in the switched-off state the energy outflow is opened together with the ventilation and the energy supply is closed (the air dryer according to the invention).
  • Regeneration system can also be realized with the use of a solenoid valve of the closing type!).
  • the regeneration air tank 7 is connected, on the one hand, to the energy drain 522 of the air dryer 5 in the known manner, on the other hand, as part of the new solution, to the connection of the solenoid valve 8, which is generally known as the energy inflow 81, and which - generally as a vent 83 known - connection of the solenoid valve 8 is open to the outside.
  • the control input 54 of the air dryer 5 is not connected to the connection 423 of the pressure regulator 4 (as is customary), but to the energy drain 82 of the solenoid valve 8.
  • FIGS. 2 and 3 show block diagrams of compressed air systems provided with various air dryer regeneration systems using an air dryer 6 with an integrated pressure regulator.
  • the pressure connection of the compressor 3 is connected to the energy inflow 61 of the known and used in practice air dryer 6 combined with a pressure regulator, and the line section 24 connected to the energy outflow 621 of the air dryer 6 is connected to the energy inflow nozzle of the protection valve 80 .
  • the vent 63 of the air dryer is open to the outside.
  • the control connection 64 and the energy drain 622 of the air dryer 6 is connected by a check valve 10, 11, the - generally known as energy inflow 81 - connection of the solenoid valve 8, the - generally known as energy outflow 82 - connection of the solenoid valve 8 with the Regeneration air tank 7, and the nozzle known as vent 83 is connected to an air tank 90 'of the air tank system 2.
  • Solenoid valves of larger diameters require higher excitation currents, so their usability is limited. 3r
  • the solution shown in FIG. 3 differs from the solution in FIG. 2 in that, in order to bridge the limit that arises from the small flow cross sections of the solenoid valves used in the automotive industry, a pneumatic relay valve 12 for faster passage r of the regeneration air flow is used.
  • the energy outflow 122 of the relay valve 12 is connected to the energy inflow of the check valves 10, 11, the nozzle of the solenoid valve 8 known as vent 83 is connected to an air tank 90 ′ of the air tank system 2, which generally my spout known as energy outflow 82 is connected to the regeneration air tank 7, the spout known as energy inflow 81 is connected to a further energy inflow 91 of the solenoid valve 9, which is controlled in parallel with the solenoid valve 8 by the regeneration-controlling electronic unit 20, wherein the energy drain 92 of the solenoid valve 9 is connected to the pneumatic control connection 124 of the relay valve 12, and the vent 93 of the solenoid valve 9 is open to the outside.
  • the inlet 121 of the relay valve 12 is also connected to the neck of the regeneration air tank 7.
  • the humidity sensor 15 consists of a measuring transducer 14, for example a capacitive measuring sensor 13 and a capacitance-controlled oscillator, furthermore a demodulator or frequency meter (depending on the structure of the moisture sensor 15).
  • the measuring sensor 13 is connected to the pressure air system such a place where the air flow is strong. In order to reduce the inertia of the sensor, the turbulence of the air flowing through in the vicinity of the sensor can be increased, for example, by installing a deflection dam.
  • the moisture sensor 15 is connected to the comparison (comparative) circuit 16 (the regeneration-controlling electronic unit 20, which compares the measured character with the constant threshold value that is programmed into the comparison circuit 16 is.
  • a light source 17, 18 of the visual indicator is driven by the push-pull outputs of the comparison circuit 16.
  • the input of a monostable multivibrator 19 is also connected to an output of the comparison circuit 16, and the control input (an embodiment of the excitation coil) of the solenoid valves 8, 9 is connected to the output of the monostable multivibrator 19 mentioned.
  • a manual regeneration start switch 21 Directly connected to the control input of the solenoid valves 8, 9 or to the input of the monostable trigger circuit 19 is a manual regeneration start switch 21 with which the response of the solenoid valves 8, 9 can be started or maintained.
  • the moisture sensor 15 continuously measures the moisture content of the compressed air and leads a measurement signal proportional to the moisture content to the comparison circuit 16, which measures the measured value with a - e.g. constant value corresponding to the relative moisture content of 33% of the measuring signal, and if the measuring signal becomes higher than the permanent value, the output signal at its push-pull output is switched from a first state to a second state. If the level of the measurement signal falls below the constant comparison value, the output signal of the comparison circuit 16 tilts back. In the first state of the comparison circuit 16, the green light source 18 of the indicator lights continuously, in the second state of the comparison circuit 16 the red light source 17 of the indicator lights continuously.
  • the comparison circuit 16 tilts the valve-controlling monostable trigger circuit 19, which generates an excitation current certain switch-on time at the electrical control input of the magnet valve (solenoid valve) 8, 9 leads.
  • the time constant of the monostable trigger circuit is selected such that the trigger circuit 19 tilts back when the regeneration air tank 7 is emptied, whereupon the excitation of the solenoid valve (s) 8, 9 ceases.
  • a monostable multivibrator is to be understood as a pulse generator of this type, which possibly even initiates two or more successive regeneration cycles upon the effect of an output signal from the comparison circuit 16.
  • the comparison circuit 16 remains tipped over, it does not give the tipping circuit 19 a new starting impulse, so this does not stimulate any further Regeneration cycle until the granules are replaced.
  • the solenoid valves 8, 9 can be switched on at any time, also independently of the measured value.
  • the pressure regulator of the air dryer works in such a way that when the air container system 2 has been filled with compressed air, the pressure regulator disconnects the filling line 22 of the compressor 3 from the line section 24 and opens it outside, so that the air container system 2 is not filled further and in the filling line 22, the pressure on the atmospheric pressure decreases, the compressor 3 continues to run, but its power consumption is low. This state is the idle operating state of the compressor 3. If compressed air is used from the air tank system 2, for example to actuate the brake, door or lifting system, the pressure of the air stored in the air tanks SC, 90 * decreases continuously, at low The pressure regulator switches the filling line 22 back to the line section 24, and the compressor 3 enters the filling operating state.
  • the compressor 3 pushes the air through the valve system of the pressure regulator and through the air dryer into the air tank system 2. During this the significant part of the moisture content conveyed by the air adheres to the surface of the regenerable granules of the air dryer. A part of the lubricating oil of the air compressor 3 gets into the conveyed air by evaporation and in addition to the moisture content, this also knocks off in the air dryer. The deposited oil contamination cannot be removed by regeneration, however, so it continuously reduces the moisture-absorbing, regenerable surface of the granulate. It is therefore necessary to replace the granules regularly.
  • Regeneration by means of back-flow of dryer compressed air is a known method, therefore its physics is not described in detail here.
  • the return flow paths of the air from the regeneration air container 7 into the air dryer are different in the different example solutions.
  • the pressure regulator 4 plays no role in the regeneration of the air dryer.
  • the tilting circuit 19 keeps the solenoid valve 8 in the de-energized, switched-off state.
  • the control connection 54 of the single-chamber air dryer 5 is open to the outside through the solenoid valve 8, and the line of the regeneration air tank 7 in the solenoid valve 8 is closed.
  • the energy inflow 51 of the air dryer is opened together with the energy outflow 521, the regeneration air tank 7 is filled by the energy outflow 522 of the air dryer 5.
  • the solenoid valve 8 switches over and closes the line of the regeneration air container 7 to the control connection 54 of the air dryer 5.
  • the air dryer valve system switches over and opens the vent 53 of the air dryer 5 , through which the regenerating air flow absorbed by the moisture content of the granulate is released into the open.
  • the energy drain 521 of the air dryer is closed. If after a given time the monostable flip-flop 19 returns to its basic position, the solenoid valve 8 closes and the initial state is reset.
  • the granulate of the air dryer 6 provided with a pressure regulator assembled air dryer valve system is regenerated by the resulting combination valve system, in which valve system the control connection 64 and energy drain 622 are also located, as in the air dryer 5 1.
  • the control connection 64 and energy drain 622 of the air dryer 6 are connected by a pipe and a check valve 10, 11 to the nozzle of the solenoid valve 8 known as the energy inflow 81, but installed here as the energy outflow, the regeneration air tank 7 is connected to connected to the nozzle known as energy drain 82, which connects the pipe filling the regeneration air tank 7, connects the nozzle of the solenoid valve 8, known as the vent 83, to the air tank system 2.
  • the regeneration air tank 7 is switched off by the magnet valve when the solenoid valve is switched off and not energized Filling line filled up, the magnetic vein til 8 is closed in the direction of the check valves 10, 11.
  • the connecting piece connected to the air tank system is closed, the pipeline of the regeneration air tank 7 is open in the direction of the check valves 10, 11.
  • the compressed air reaching the control connection 64 of the air dryer 6 opens the vent 63, and at the same time closes the energy drain 621, the amount of air in the regeneration air tank 7 passes through the energy drain 622, the granules of the air dryer 6 and the Vent 63 to the outside, taking with it the moisture adhering to the granulate.
  • the regeneration air flow does not flow through the solenoid valve 8, but rather through the larger flow cross section of the relay valve 12 when the solenoid valve 8 is open.
  • the filling of the regeneration air container 7 with compressed air - similar to Solution according to Fig. 2 - is done by the solenoid valve 8 in the de-energized, closed state thereof.
  • the energy inflow 81 At the nozzle of the solenoid valve 8 known as the energy inflow 81, the energy inflow 91 of a further solenoid valve 9 is connected by a pipeline, and an energy outflow 92 of the solenoid valve 9 is connected to a pneumatic control connection 124 of the relay valve 12.
  • the energy drain 92 is opened together with the vent 93 of the solenoid valve 9, that is to say the relay valve 12 receives no control.
  • the energy inflow 121 is closed and the energy outflow 122 is opened together with the vent 123.
  • the regeneration cycles are more frequent.
  • the regeneration cycles become more and more frequent in proportion to the contamination of the filter insert, and when the air dryer is no longer able to convey enough dry air, the regeneration cycles stop.
  • There are also no regeneration cycles if there is continuously enough dry air in the air tank system 2, for example because it is is just not needed.
  • the regeneration air tank 7 can be smaller, and the regeneration cycles that are required more frequently due to the contaminated granulate can be done with a smaller amount of air be carried out (for example with only one regeneration cycle with a small amount of compressed air).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Gases (AREA)

Abstract

Un système de régénération de sécheurs d'air pour compresseurs, utile notamment pour des systèmes à air comprimé de véhicules à moteur, comprend un système de soupapes de régénération à contre-courant du sécheur d'air et un circuit détecteur d'état situé dans le système de conduits d'air comprimé ou dans le système de réservoirs d'air qui commande le système de soupapes du sécheur d'air. Le circuit détecteur d'état est un détecteur à seuil de la teneur en humidité, connecté à l'entrée de commande électrique d'une soupape magnétique (8, 9) du système de soupapes du sécheur d'air par une unité de commande des soupapes qui détermine leur durée de connexion. Lorsque la teneur en humidité augmente jusqu'à dépasser une valeur limite, le sécheur d'air (5, 6) est raccordé au réservoir (7) d'air de régénération, indépendamment d'autres facteurs. En outre, un dispositif de visualisation de l'état est raccordé avantageusement au détecteur à seuil de la teneur en humidité et un commutateur (21) à actionnement manuel est raccordé à l'unité de commande de la soupape magnétique (8, 9).
PCT/HU1993/000049 1992-09-30 1993-09-06 Systeme de regeneration de secheurs d'air pour compresseurs WO1994007726A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU9203107A HU9203107D0 (en) 1992-09-30 1992-09-30 Device for regenerating air dehumidifier preeferably for those of air-pressure system of motor vehicles
HUP9203107 1992-09-30

Publications (1)

Publication Number Publication Date
WO1994007726A1 true WO1994007726A1 (fr) 1994-04-14

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PCT/HU1993/000049 WO1994007726A1 (fr) 1992-09-30 1993-09-06 Systeme de regeneration de secheurs d'air pour compresseurs

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HU (1) HU9203107D0 (fr)
WO (1) WO1994007726A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034785A1 (fr) * 1995-04-29 1996-11-07 Robert Bosch Gmbh Dispositif d'alimentation en air comprime pour systemes d'air comprime pour vehicules et procede de commande de ce dispositif
WO2004005100A1 (fr) * 2002-07-03 2004-01-15 Wabco Automotive Uk Limited Systeme d'alimentation en air pour vehicule
EP1602545A1 (fr) * 2004-06-01 2005-12-07 Haldex Brake Products GmbH Dispositif de traitement du air pour une installation à air comprimé de véhicle
EP1813491A2 (fr) * 2006-01-26 2007-08-01 Bendix Commercial Vehicle Systems, LLC Système de climatisation pour véhicule avec indicateur, dessiccateur d'air et son procédé
US8142556B2 (en) 2007-03-08 2012-03-27 Knorr-Bremse Systeme Fuer Nutzfahzeuge Gmbh Compressed-air supply device with improved regeneration capacity
US9254826B2 (en) 2012-10-26 2016-02-09 Hyundai Motor Company Purge control method of air tank
WO2016120064A1 (fr) * 2015-01-29 2016-08-04 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Procédé de surveillance d'un déshumidificateur d'air par l'intermédiaire de la concentration en co2

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445699A1 (de) * 1984-12-14 1986-06-19 Knorr-Bremse AG, 8000 München Lufttrocknungseinrichtung fuer druckluftanlagen
EP0199948A1 (fr) * 1985-04-22 1986-11-05 Knorr-Bremse Ag Dispositif pour le séchage d'air comprimé
EP0405073A2 (fr) * 1989-06-22 1991-01-02 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Sécheur d'air pour une installation d'air comprimé comprenant au moins un réservoir de stockage d'air et chargeable par un compresseur, en particulier pour une installation de freins à air comprimé de véhicules
WO1991016224A1 (fr) * 1990-04-12 1991-10-31 Allied-Signal Inc. Systeme de commande de charge/purge pour secheur par air avec controle d'humidite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3445699A1 (de) * 1984-12-14 1986-06-19 Knorr-Bremse AG, 8000 München Lufttrocknungseinrichtung fuer druckluftanlagen
EP0199948A1 (fr) * 1985-04-22 1986-11-05 Knorr-Bremse Ag Dispositif pour le séchage d'air comprimé
EP0405073A2 (fr) * 1989-06-22 1991-01-02 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Sécheur d'air pour une installation d'air comprimé comprenant au moins un réservoir de stockage d'air et chargeable par un compresseur, en particulier pour une installation de freins à air comprimé de véhicules
WO1991016224A1 (fr) * 1990-04-12 1991-10-31 Allied-Signal Inc. Systeme de commande de charge/purge pour secheur par air avec controle d'humidite

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034785A1 (fr) * 1995-04-29 1996-11-07 Robert Bosch Gmbh Dispositif d'alimentation en air comprime pour systemes d'air comprime pour vehicules et procede de commande de ce dispositif
CN1073519C (zh) * 1995-04-29 2001-10-24 克诺尔制动器－载重汽车系统有限公司 用于汽车气动装置的压缩空气供给装置以及控制压缩空气供给装置的方法
WO2004005100A1 (fr) * 2002-07-03 2004-01-15 Wabco Automotive Uk Limited Systeme d'alimentation en air pour vehicule
US8403427B2 (en) 2002-07-03 2013-03-26 Wabco Automotive Uk Limited Vehicle air supply system
EP1602545A1 (fr) * 2004-06-01 2005-12-07 Haldex Brake Products GmbH Dispositif de traitement du air pour une installation à air comprimé de véhicle
EP1813491A2 (fr) * 2006-01-26 2007-08-01 Bendix Commercial Vehicle Systems, LLC Système de climatisation pour véhicule avec indicateur, dessiccateur d'air et son procédé
EP1813491A3 (fr) * 2006-01-26 2011-01-19 Bendix Commercial Vehicle Systems, LLC Système de climatisation pour véhicule avec indicateur, dessiccateur d'air et son procédé
US8142556B2 (en) 2007-03-08 2012-03-27 Knorr-Bremse Systeme Fuer Nutzfahzeuge Gmbh Compressed-air supply device with improved regeneration capacity
US9254826B2 (en) 2012-10-26 2016-02-09 Hyundai Motor Company Purge control method of air tank
WO2016120064A1 (fr) * 2015-01-29 2016-08-04 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Procédé de surveillance d'un déshumidificateur d'air par l'intermédiaire de la concentration en co2

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Publication number Publication date
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