WO2012051983A2 - Verfahren zum ansteuern eines elektrisch betätigbaren hydraulikventils - Google Patents
Verfahren zum ansteuern eines elektrisch betätigbaren hydraulikventils Download PDFInfo
- Publication number
- WO2012051983A2 WO2012051983A2 PCT/DE2011/001763 DE2011001763W WO2012051983A2 WO 2012051983 A2 WO2012051983 A2 WO 2012051983A2 DE 2011001763 W DE2011001763 W DE 2011001763W WO 2012051983 A2 WO2012051983 A2 WO 2012051983A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic valve
- current
- valve
- pressure
- hysteresis
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/002—Calibrating
-
- 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
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/102—Actuator
- F16D2500/1026—Hydraulic
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3022—Current
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3024—Pressure
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/506—Relating the transmission
- F16D2500/5063—Shaft dither, i.e. applying a pulsating torque to a (transmission) shaft to create a buzz or dither, e.g. to prevent tooth butting or gear locking
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/51—Relating safety
- F16D2500/5102—Detecting abnormal operation, e.g. unwanted slip or excessive 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/702—Look-up tables
- F16D2500/70205—Clutch actuator
- F16D2500/70217—Pressure
-
- 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
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/702—Look-up tables
- F16D2500/70205—Clutch actuator
- F16D2500/70223—Current
Definitions
- the invention relates to a method for driving an electrically actuated hydraulic valve, wherein a drive current of the hydraulic valve is modulated in order to reduce an undesirable hysteresis in the operation of the hydraulic valve.
- German patent application DE 197 27 358 A1 discloses a pressure medium system with a controllable by a control valve valve is known, wherein a control variable from at least two control variable portions is generated, wherein the one control variable portion is modulated with a first frequency, the second control variable component modulated with a second frequency is.
- the object of the invention is to improve the characteristic quality when driving electrically actuated hydraulic valves, and / or to reduce the leakage when driving electrically actuated hydraulic valves.
- the object is in a method for driving an electrically actuated hydraulic valve, wherein a drive current of the hydraulic valve is modulated to reduce undesired hysteresis in the operation of the hydraulic valve, achieved in that an expected current-pressure characteristic with a measured current pressure Characteristic is compared to detect an undesirable hysteresis.
- the current can be detected, for example, when driving the hydraulic valve.
- the pressure can be detected with a pressure sensor.
- the pressure can be advantageously detected with an existing pressure sensor.
- the valve is preferably a continuous valve.
- the continuous valve is a valve in which the output quantity is proportional to the input signal. Therefore, continuous valves are also referred to as proportional valves.
- a preferred embodiment of the method is characterized in that a superimposition of the drive current of the hydraulic valve is currently increased if an undesired hysteresis was detected by comparing the expected current-pressure characteristic with the measured current-pressure characteristic.
- Superposition is a process in which the atrial current required for a desired pressure is varied by an average value, preferably with a defined frequency and amplitude
- a further preferred embodiment of the method is characterized in that the superimposition of the drive current is increased up to a maximum limit in order to reduce the hysteresis as needed.
- the upper limit is set or learned beforehand and depends, for example, on a maximum permissible valve spool travel.
- a further preferred embodiment of the method is characterized in that the superposition of the drive current is raised to a standard level only when a setpoint changes.
- the setpoint is a pressure setpoint in the hydraulic system.
- a further preferred embodiment of the method is characterized in that the superimposition of the drive current in idle phases of the hydraulic valve is significantly reduced or completely switched off. For example, a rest phase occurs when a set valve spool position is to be held. Especially with directional valves, which release a flow cross-section depending on the current without pressure feedback, it is advisable to raise the overlay to the standard level only if the setpoint changes, and if the set slider position is only to be maintained, to significantly reduce the overlay or completely during idle periods off. A control of the actual value is not required here, since there is no external reaction to the hydraulic valve.
- a further preferred embodiment of the method is characterized in that the expected current-pressure characteristic is applied during commissioning or during operation of the hydraulic valve.
- the expected current-pressure characteristic is preferably currently learned for the respective hydraulic valve.
- a further preferred exemplary embodiment of the method is characterized in that a characteristic overlay is applied, which provides a permanent minimum overlay of the drive current of the hydraulic valve.
- the basic overlay map is preferably a function of the current value of the drive current of the hydraulic valve and the temperature.
- the permanent minimum overlay is preferably uncritical with regard to leaks in each case.
- a further preferred embodiment of the method is characterized in that the hydraulic valve is designed as a slide valve for controlling and / or regulating a hydraulic pressure.
- the slide valve can be directly controlled or pilot operated.
- the invention further relates to a hydraulic system with at least one hydraulic valve, which is controlled according to a method described above.
- the invention relates to the control of electrical continuous valves for generating hysteresis characteristics.
- the superimposition frequency is chosen so that the relevant components of the excitation without resonance problem or disturbances of the sequential system (for example, clutch jacks or the like) can follow and is thus avoided due to the permanent oscillating motion stiction.
- the hysteresis can be significantly reduced, that is, it is very accurately adjusted to the current output value (pressure, flow, %), regardless of whether the current was approached from above or below.
- the overlay described is effective only with sufficient current amplitude.
- Heavy-duty gate valves such as viscous oil in the gaps or dirt, require stronger excitation than smooth-running ones.
- the amplitudes are usually stored as a function of temperature as a map.
- the superposition amplitude can only be determined as a compromise between good hysteresis on the one hand and low leakage on the other hand, and is always a suboptimal compromise due to variations and variations in valve characteristics.
- the object of the present invention is to optimize the characteristic quality (hysteresis, reproducibility) without impairing the leakage of the valve flat rate.
- the output value of the valve for example a clutch pressure downstream of a 3/2-way pressure-reducing valve, is monitored anyway by means of a pressure sensor and tested for plausibility.
- This pressure signal is to be used according to the invention to detect by constant comparison between the expected current-pressure characteristic (which was learned during operation or during start-up) and the measured a possible hysteresis and to combat this by instantaneous increase of the superposition amplitudes.
- a map for the fundamental superimposition could be created as a function f (current value, temperature), which provides a permanent minimum superposition, which in any case is uncritical with regard to leaks.
- f current value, temperature
- the electronics could increase the amplitude up to a definable upper limit to combat hysteresis.
- the superimposition amplitude can be increased as needed by means of the invention, so that no unnecessary increase in leakage results.
- the overlay can be lowered or shut down in idle phases without a setpoint gradient.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112011104188T DE112011104188A5 (de) | 2010-10-21 | 2011-09-22 | Verfahren zum Ansteuern eines elektrisch betätigbaren Hydraulikventils |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010049039.3 | 2010-10-21 | ||
| DE102010049039 | 2010-10-21 | ||
| DE102011014929 | 2011-03-24 | ||
| DE102011014929.5 | 2011-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012051983A2 true WO2012051983A2 (de) | 2012-04-26 |
| WO2012051983A3 WO2012051983A3 (de) | 2012-06-14 |
Family
ID=45445669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2011/001763 Ceased WO2012051983A2 (de) | 2010-10-21 | 2011-09-22 | Verfahren zum ansteuern eines elektrisch betätigbaren hydraulikventils |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE112011104188A5 (de) |
| WO (1) | WO2012051983A2 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012215353A1 (de) * | 2012-08-29 | 2014-03-06 | Continental Teves Ag & Co. Ohg | Schaltumkehrverfahren für ein analogisiert betriebenes Magnetventil, elektrohydraulische Bremsanlage und Verwendung der elektrohydraulischen Bremsanlage |
| DE102016202999B4 (de) | 2016-02-25 | 2022-03-31 | Zf Friedrichshafen Ag | Verfahren zur Ansteuerung von Druckreglern mittels einer Ditherfunktion |
| DE102019204724B3 (de) | 2019-04-03 | 2020-10-01 | Audi Ag | Verfahren zum Betreiben eines Hydraulikventils einer Hydraulikeinrichtung einer Kraftfahrzeuggetriebeeinrichtung sowie Kraftfahrzeuggetriebeeinrichtung |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727358A1 (de) | 1996-07-02 | 1998-01-08 | Luk Getriebe Systeme Gmbh | Druckmittelanlage sowie ein Verfahren zu deren Verwendung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000283325A (ja) * | 1999-03-30 | 2000-10-13 | Aisin Seiki Co Ltd | 比例電磁弁の制御装置 |
| DE102008000304B4 (de) * | 2008-02-15 | 2017-09-14 | Zf Friedrichshafen Ag | Verfahren zum Betreiben einer Ventileinrichtung einer Getriebeeinrichtung |
-
2011
- 2011-09-22 DE DE112011104188T patent/DE112011104188A5/de not_active Withdrawn
- 2011-09-22 WO PCT/DE2011/001763 patent/WO2012051983A2/de not_active Ceased
- 2011-09-22 DE DE102011114063A patent/DE102011114063A1/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727358A1 (de) | 1996-07-02 | 1998-01-08 | Luk Getriebe Systeme Gmbh | Druckmittelanlage sowie ein Verfahren zu deren Verwendung |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012051983A3 (de) | 2012-06-14 |
| DE112011104188A5 (de) | 2013-09-05 |
| DE102011114063A1 (de) | 2012-04-26 |
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