DE102004020137B4 - Air conditioning system of a motor vehicle and method for operating an air conditioning system of a motor vehicle - Google Patents

Air conditioning system of a motor vehicle and method for operating an air conditioning system of a motor vehicle

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Publication number
DE102004020137B4
DE102004020137B4 DE200410020137 DE102004020137A DE102004020137B4 DE 102004020137 B4 DE102004020137 B4 DE 102004020137B4 DE 200410020137 DE200410020137 DE 200410020137 DE 102004020137 A DE102004020137 A DE 102004020137A DE 102004020137 B4 DE102004020137 B4 DE 102004020137B4
Authority
DE
Germany
Prior art keywords
control
air
curve
mixing
heating power
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.)
Expired - Fee Related
Application number
DE200410020137
Other languages
German (de)
Other versions
DE102004020137A1 (en
Inventor
Klaus Arold
Herbert Wieszt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WIESZT, HERBERT, DIPL.-ING. (FH), 71120 GRAFEN, DE
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Priority to DE200410020137 priority Critical patent/DE102004020137B4/en
Publication of DE102004020137A1 publication Critical patent/DE102004020137A1/en
Application granted granted Critical
Publication of DE102004020137B4 publication Critical patent/DE102004020137B4/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835Damper doors, e.g. position control

Abstract

Air conditioning system of a motor vehicle with a temperature control device, which has a control computer and an air mixing device for mixing cold air and hot air, wherein a mixing position of the air mixing device is controlled by the control computer taking into account a hysteresis parameter,
characterized,
that
The control computer specifies the mixing position (X) of the air mixing device corresponding to the value of a desired heating power (L) in order to regulate an interior temperature of the vehicle cabin,
- Wherein the control computer to compensate for a hysteresis of the air mixing device at a change in position to increase the heating power (L) adjusts the mixing position (X) according to the desired heat output (L) according to a first control cam (1)
- and at a position change to reduce the heating power (L) according to a second, compared to the first control cam (1) different control cam (2, 2 '),
Wherein one of the control cams (2; 2 ') is determined at least in regions by a mixing default curve (1) and a hysteresis parameter (H), and the hysteresis parameter (H) is used to change the control curve (2; 2') in its value assignment of .. ,

Description

  • The The invention relates to an air conditioning system of a motor vehicle after The preamble of claim 1 and a method according to the preamble of Patent claim 8.
  • The DE 30 42 130 A1 shows a generic type air conditioning system of a motor vehicle having a temperature control device with a control computer and an air mixing device for mixing cold air and hot air. The control computer of the air conditioner controls a mixing position of the air mixing device. Various data, such as temperature setting information, temperature sensor measured values, the resistance value of a return potentiometer or operating mode information are stored in the control computer as control data for calculating the angular positions of the louvers, including the air mix door. When controlling the air mixing valve, a hysteresis parameter is taken into account.
  • The EP 1 110 769 A2 discloses an air conditioning system for a motor vehicle whose heat exchanger is flowed through in different areas in opposite directions, wherein a plurality of air mixing devices are provided for different ventilation zones. In order to avoid unstable air flows during the transition from a hot air position to a cold air position or vice versa centrally mounted air mixing flaps are provided in this air conditioner, so that when changing the mixing position only small variations in the amount of air are given.
  • The DE 32 37 816 C2 discloses a method that provides temperature-dependent control intervention in the blower control for improved temperature control of an air mixing plant.
  • In the DE 42 37 847 A1 an air conditioning system of a motor vehicle is proposed, which has a temperature control to ensure comfortable ventilation temperatures in the vehicle cabin, which provides differently tempered air at different air outlets of the air conditioning.
  • The DE 44 00 810 C2 proposes a very complex device and control, which allows different outlets of an air conditioner to supply over changing operating conditions, each with different, a comfortable cabin ventilation temperatures.
  • The DE 101 13 800 A1 discloses an air conditioning system for a motor vehicle whose control for improving the control action in the calculation provides a proportional gain and an integral gain factor.
  • The DE 695 03 822 T2 discloses an air conditioner improved with respect to a dehumidifying operation. A fan control of the condenser fan described therein is provided with a switching hysteresis to avoid rapid successive mode changes.
  • The DE 694 16 008 T2 describes a generic air conditioning and provided for their operation control. In such vehicle air conditioners whose ventilation temperature is controlled via an air mixing device, which mixes cold air and hot air to set a desired ventilation temperature with each other, the mechanical hysteresis is at a temperature control by specifying one of the cooled air applied Sollheizleistung and a correlating mixing position of the air mixing device in the control computer Air mixing device, which results, for example, by mechanical play between the controlled on the damper drive mixing position and effected change in the flap positions, to be considered in a hysteresis control specification. This is done, for example, by controlling the mixing position of the air mixing device to be adjusted for heating power increase and heating power reduction according to two different curves via a control algorithm of the control computer, wherein the curves are ideally distinguished by the movement or position offset necessary for overcoming the mechanical clearance.
  • task The invention is a generic air conditioning, respectively to provide a method of operating such an air conditioning system, the one Hystereseaussteuerung the bearing clearance in the kinematics the flap drive of the cold and hot air mixing valve of the air mixing device has, which is adaptable in a particularly simple manner.
  • The object is achieved by an air conditioner with the features of claim 1 and a method for operating an air conditioner with the features of claim B. In such an air conditioner or such a method, a temperature control device is provided which a control computer and an air mixing device for mixing cold air and warm air, wherein a mixing position of the air mixing device is controlled by the control computer taking into account a hysteresis parameter. The control computer gives the mixing position of the air mix device according to the value of a desired heating power in order to control an interior temperature of the vehicle cabin, wherein the control computer adjusts the mixing position according to the Sollheizleistung according to a first control curve to compensate for a hysteresis of the air mixing device at a position change to increase the heating power and at a change in position to reduce the heating power according to a second, opposite to the first control cam different control curve. In this case, one of the cams is determined at least in regions by a mixing default curve and a hysteresis parameter, and the hysteresis parameter for changing the control curve can be changed in its value assignment from the mixed position to the desired heat output.
  • Consequently is over a control algorithm of the control computer to be set Mixed position of the air mixing device for heating power increase and the mixing position for heating power reduction according to two controlled different control curves, wherein for reversing the Control of a controlled heating power increase out to a heating power reduction or vice versa the control the reverse heating power change a hysteresis control is arranged upstream on the basis of a hysteresis control specification. The hysteresis control preset is determined by the control algorithm Difference of the two mixing positions determined, which stands for the value of Heating power at which the drive reverses, based on the two Result in control curves.
  • at an air conditioner according to the invention or a method according to the invention to operate an air conditioner in the computer are a mixed default curve and a hysteresis parameter, based on which by a setting algorithm at least one of the control curves at least partially predetermined is. The example about a programming operation or a billing of other parameters changeable Hysteresis parameter now allows easy adjustability of the Hysteresesteuervorgabe. In this case, by means of the hysteresis parameter at least for the area of the control curve, the setting algorithm of the control computer by means of the hysteresis parameter and the mix default curve determines the hysteresis control preset to overcome of due to mechanical clearance Totweges or of the associated Position offsets when the direction of movement of the drive changes the air mixing device customizable.
  • Of the Fixing algorithm can be calculated from the hysteresis parameter Curve of a database make a curve selection, this being Curve, for example, as a mixed setpoint curve or control curve or as an offset curve for superposition with a mixed default curve can be used.
  • Of the However, hysteresis parameters can also be used in the context of the setting algorithm for offsetting, for example for multiplication with a hysteresis reason or an offset curve, the determined values being superimposed on the mixing default curve, so be added or subtracted. In the simplest case is through the setting algorithm of the hysteresis parameters by mere addition or Subtract the parameter value from the respective one by the mixed default curve calculated value for determining the associated value of the control curve used. The value of the hysteresis parameter is above the Defined curve range constant offset value.
  • Of the Control calculator can either by means of the hysteresis parameter the two control curves or even both cams set, which in particular of the mechanical connection of the drive of the Mixing device to the flaps and thus the associated Spielbehaftung depends. A consideration the hysteresis parameter when defining both control curves In particular, it is necessary when the drive for both hot air dampers, as well as for the Cold air flaps of the air mixing device on kinematic play Elements takes place. If the drive is connected directly to one of the flaps, it must only one of the control curves at least partially by means of Hystereseparameters and a mixed default curve from the control computer be determined.
  • Of the Control computer of an air conditioner according to the invention, for example in a control unit the air conditioning, a climate control unit, a central computer of the Vehicle or remote vehicle control units integrated. It can too various computing functions are split on different devices. In this case, the control computer microprocessors, memory units, Analog computers, sensors, control units, motors, actuators, operating elements, Displays and interfaces, for example to connect to others Control devices, exhibit.
  • An air conditioner according to the invention or a method for operating an air conditioning system according to the invention makes it possible to easily adjust the hysteresis control input in the control computer of the air conditioning system to variable or variable variables by setting the hysteresis parameter in the control computer and defining it by means of the hysteresis parameter and a mixture default curve mechanical La gerspiels in the kinematics of the damper drive of the cold and hot air mixing valve of the air mixing device. For example, due to production-related differences in the mechanical hysteresis, different hysteresis variables may be present over the individual plants in the case of different plants of the same type or, for example, variable hysteresis may occur due to wear over the operating time of a plant.
  • Around Compensate component or assembly tolerances and the regulation of a To improve air conditioning thereby, that the specific hysteresis of each individual plant and not a previously determined by series of experiments Hysteresis is set, for example, in the frame a usual one functional test or a first operation of the system determines a basic value of the hysteresis parameter and stored in the control computer. The determination of the basic value Hysteresis parameter can for every single investment done or, if slow, for example changeable Component tolerances considered Need to become, at predetermined intervals be determined by a measurement, wherein in this measurement determined basic value in the next single measurement Number of unmeasured systems is stored in the control computer.
  • Especially to one only in individual cases inadequate To correct hysteresis control default is in one embodiment provided the air conditioning, the hysteresis parameter by means of a Input operation on the vehicle, for example, immediately on control unit the control computer preferably in a service mode or via a service equipment can be made to vote. Here, a preferably by Service specifications fixed correction of the hysteresis parameter of occurring errors or defects the climate control.
  • Uptime-related changes the mechanical hysteresis, for example due to wear increasing bearing clearance, which in a simple way, for example can be determined by endurance tests or calculation, can in the Hysteresis control target taken into account be by the control calculator by categorization or offsetting changed from operating time parameters Values of the hysteresis parameter are calculated or determined, which then be used to determine the Steuerungskuve.
  • at an embodiment the air conditioner is the mixed default curve firmly stored in the computer, which especially fewer calculations and associated Storage space needed and thus a less complex control calculator with lower Acquisition costs is necessary. In general, a single is enough Mixed default curve, essentially by the geometry the system and the units used certain flow conditions is set in the air conditioning. The firmly stored mixed setpoint curve can furthermore be stored as an element of a database in which a selection of different mixing default curves are stored. About these embodiment In addition, the mixed setpoint curve can be calculated using operating parameters, for example, for consideration different ventilation modes, be changeable in the control computer.
  • at a particular embodiment one of the control curves is identical to the mixed default curve. This results in the other control curve by fixing the Control computer by means of the hysteresis parameter whose parameter value for example, deducted from the mixing default curve. A such embodiment needed especially little computer and storage capacity.
  • at an embodiment For example, one of the control curves is preferably in a middle range Heating power through the mixing setpoint curve, in particular one with the other control curve identical mixed default curve, and the Hysteresis parameters set, defining the control curve in this area in a particularly simple manner by addition or Subtracting the hysteresis parameter value to or from the mixture default curve, So the other control curve, takes place. Both control curves ends at the same point of maximum heat output with fully open Hot air flap and closed cold air flap and in the same point minimal heat output with fully opened cold air flap and closed hot air flap. The movement of the air mixing device close these control points is due to partial concerns of the each closing Flaps and a given biasing the drive kinematics only to a lesser extent hysteresis as in the remaining motion or mixing range. As a result, only minor hysteresis differences are found in these areas or changes to be expected than in the remaining motion or mixing range and therefore a hysteresis comparison is not absolutely necessary. Consequently can be used to reduce necessary calculation steps in the control computer in the range of minimum and maximum heating power, a partial area Both rules are firmly stored and the determination of a the control curves to a range of average heat outputs Bersch refill ink.
  • It can also be used in a particular embodiment to avoid curve jumps in fixed curve area and in the curve area determined by the computer by means of the mixing setpoint curve and the hysteresis parameter is defined in each case a transfer point, between which the control curve is interpolated. As a result, a more uniform control behavior of the air conditioning system can be achieved.
  • The Control curves of an embodiment are shown in the drawing, wherein:
  • 1 A sketchy representation of an air conditioner according to the invention and
  • 2 The control curves for controlling the mixing position of the air mixing device X according to the desired heat output L of an air conditioner according to the invention or a method according to the invention for operating an air conditioner show.
  • In 1 is an embodiment 100 an air conditioner according to the invention shown. This has a temperature control device, which in the air distributor 102 the air conditioning 100 temperature to be adjusted by mixing hot air with cold air. The hot air is made by flowing through the heat exchanger 101 generated. The cold air flows past the heat exchanger via a bypass. The control of the mixture is done by adjusting the mixing position of the air mixing device 120 , The air mixing device has a stepper motor driving a control linkage 121 and two valves driven in opposite directions by this control link: the hot air flap 122 and the cold air flap 123 on. The mechanically coupled flaps move 122 and 123 from a first end position with tightly closed hot air flap 122 and opened cold air flap 123 continuously up to an opposite end position with open hot air flap 122 and tightly closed cold air flap 123 , The controlled mixing position is determined by the number of steps the stepper motor has traveled 121 described in relation to a specified basic position. The actuator 121 is from a control computer connected to it 110 controlled by various interfaces 111 connected to control units, control units and sensors of the vehicle and the service interface.
  • 2 shows a control diagram with control curves that underlie in an embodiment of an air conditioner according to the invention or a method for operating an air conditioner according to the invention an algorithm for controlling a mixed position according to the input quantity desired heat output H.
  • The crossing point of the coordinate axes of the graph shown defines a point 11 in which the desired heat output L plotted on the abscissa has a minimum value L 0 , which usually has the value zero. The controlled setting position X, which is plotted on the ordinate, corresponds in this point to the limiting position X 0 of the air mixing device with open cold air flap and closed hot air flap, in which their value is usually defined to zero. The limiting position X 0 is in the air mixing device, for example via a mechanical stop, such as the abutting hot air flap, set.
  • The point 11 of the control diagram limits a control curve 1 and control curves 2 respectively 2 ' in the range of minimum heating capacities. control curve 1 is used to control a mixing position X after the heating power L with increasing the heating power L, the control curves 2 respectively 2 ' for controlling a mixing position X according to the heating power L while reducing the heating power L.
  • Starting from this state, a mixing position X, which follows the curve, is to be controlled when higher heating power is required 1 resulting from the requested heating power. In this case, the air mixing device to the local limiting position X max of the mixing position, which is set, for example, by the complete opening of the hot air damper or on the attack going, closing cold air damper. This limiting position is at the request of a maximum heating power L max in the point 12 of the diagram. The control point 12 limits the control curves 1 and 2 , respectively 2 ' in the range of maximum heating power.
  • If, starting from a maximum heating power L max, a reduced heating power is set, the corresponding mixing position is controlled on the basis of an associated regulation curve. In the illustrated embodiment, the Abregelkurve is partially variable. Exemplary are the Abregelkurven 2 and 2 ' shown.
  • By defining a value L a of the desired heating power L, for example via an associated mixing position X a on the curve 1 , and a value L b , for example, via an associated value X b of the mixing position X on the curve 2 is set, a range of low heating power of L 0 to L a , a range of average heating power of L a to L b and a range of high heating power of L b to L max defined. The values of the associated mixing positions X a and X b , which are used to establish L a and L b , are preferably in turn determined by being in the order of 2 to 3 times a basic value H 'of the hysteresis of each assigned limiting position X 0 , or X max are removed.
  • Over the range of low heat output between L 0 and L a , the range of average heat output of L a and L b and the range of high heat output between L b and L max are on the curves 1 . 2 and 2 ' Defines the corresponding low, medium and high heating power curve ranges. So can on the curve 2 the curve area 21 in the range of low heat outputs, the curve area 22 in the range of average heating power and the curve area 23 be set in the range of high heat outputs.
  • On the Abregelkurven of the embodiment shown, which describe the mixing position X depending on the heating power L at Heizleistungsreduzierung, the curve of the control computer in the range of average heating power between L a and L b is set via a mixing setpoint curve and the hysteresis. The curve 2 ' is an output curve of the Abregelkurve that predefines the value of the mixing position X as a function of the heating power L at a reduction of the heating power L before a first changed dropping of the hysteresis parameter in the control computer. This can be stored as a mixed setpoint curve in the control computer. In the embodiment shown, the curve is only in the curve areas 21 , between L 0 and L a , and 23 , between L b and L max permanently stored in the control computer. On these curve areas 21 and 23 are transfer points 26 and 29 defines the respective subarea of the curve areas 21 and 23 to limit mean heating power, which is based on all Abregelkurven independent of changeable offable hysteresis. The range of average heating power of the curve 2 ' is calculated from the curve range of the curve, which is the basis for the mixing default curve 1 between L a and L b by means of the hysteresis base parameter H ', which is subtracted as the offset value.
  • At the shown embodiment is the value H of the hysteresis parameter different from that in the Initial programming of the control computer fixed first value H 'of the hysteresis parameter changed stored. The value H can be determined, for example, by a calibration run of the Control computer determined with its associated air conditioning as the base value and in the local test station programmed into the control computer. It can also be a reconcilable Basic value H of the hysteresis parameter, for example, by statistical Measurement and evaluation of air conditioners in production determined is transferred to the control computer at a programming station on the assembly line and replace the initial value H '. Furthermore, for example, in the garage service after a vorgebenen Operating time or because of complaints of the control quality a correction value H of the hysteresis parameter at a service interface of the control computer programmed.
  • The curve area 22 at medium heating power of the control curve 2 is now calculated by subtracting the new hysteresis parameter value H, which has a slightly increased value compared to the hysteresis base parameter H '. The respective value of the hysteresis parameter is thus an offset value for the subtraction of the curve used as the mixing default curve 1 , in the range of average heat outputs between L a and L b . The curve area defined in this way by the control computer 22 is through the two control points 27 and 28 Limited to the areas of low and high heat output. Between these boundary points and their assigned transfer points 26 and 29 on the firmly stored curve areas 2 and 23 the curve 2 are each a transfer section to avoid jumps 24 and 25 the curve 2 interpolated. These transitional sections 24 and 25 are curve sections of the curve 2 in the range of low and high heating power, in contrast to the fixed curves 21 and 23 by the control computer based on the mixed setpoint curve and the hysteresis parameter H via the interpolation indirectly determined. The by the control computer based on the serving as a mixture default curve curve 1 and the hysteresis parameter H specified range of the Abregelkurve 2 Thus, beyond the curve range of average heating powers between L a and L b , the range between the transfer points is included 26 and 29 ,
  • In 2 Furthermore, a control process is sketched in which after a steady increase in the heating power L up to a value L1, the heating power is reduced again. The course of the input value of the desired heating power is indicated by the arrows on the abscissa: increase from L to the value L1 and subsequent decrease of the value. During the increase in the heating power, the mixing position to be triggered resulted from the curve 1 , To reach the nominal heating power of L1, the mixing position X1 had to be activated. For opposing control of the heating power change to reduce the heating power of the hysteresis offset is first controlled, which corresponds in the embodiment shown over the course of the control curves constant to the value H of the hysteresis parameter. At constant heating power L1, the mixing position X2 is controlled before a further control to reduce the heating power. The difference between X1 and X2 corresponds to the hysteresis offset and thus to the hysteresis parameter H in the exemplary embodiment shown. Starting from the mixing position X2, the air mixing device is activated with steadily decreasing mixed-position values for reducing the heating power.
  • Without the previous adjustment of the in the control computer stored value of the hysteresis parameter H on the actual mechanical clearance of the air mixing device, the control device would take into account the hysteresis H 'and before further adjusting the heating power, the mixing position X2'ansteuern. The further mixing positions with steadily reduced heating powers L less L1 would be the control calculator according to the curve 2 ' set and thereby set a significant Heizleistungsoffset between the desired heating L and supplied by the air mixing system heating power. The offset corresponds to the difference between the heating powers, which on the one hand is based on the curve 2 ' and on the other hand according to curve 2 for a mixed position value.
  • The shown determination of the control curves by the control computer using the hysteresis parameter and the blend default curve allows one particularly easy adjustment of the air conditioning to changes the system hysteresis.

Claims (10)

  1. Air conditioning system of a motor vehicle with a temperature control device, which has a control computer and an air mixing device for mixing cold air and warm air, wherein a mixing position of the air mixing device is controlled by the control computer taking into account a hysteresis parameter, characterized in that - the control computer, the mixing position (X) of the air mixing device accordingly the control computer to compensate for a hysteresis of the air mixing device at a position change to increase the heating power (L) the mixing position (X) according to the desired heat output (L) according to a first control curve ( 1 ) - and at a position change to reduce the heating power (L) according to a second, compared to the first control cam ( 1 ) different control curve ( 2 . 2 ' ), whereby one of the control cams ( 2 ; 2 ' ) at least partially by a mixing default curve ( 1 ) and a hysteresis parameter (H), and the hysteresis parameter (H) for changing the control curve ( 2 ; 2 ' ) is variable in its value assignment of the mixed position (X) after the desired heating power (L).
  2. Air conditioning system according to claim 1, characterized in that a determined during a first operation or calibration of the air conditioner Basic plant value of the hysteresis parameter (H) in the air conditioning system assigned control computer is stored.
  3. Air conditioning system according to claim 1 or 2, characterized that the value of the hysteresis parameter (H) by input operation on the vehicle or a service interface is changeable and storable.
  4. Air conditioning system according to one of claims 1 to 3, characterized that by operating time parameters or offsetting operating time parameters different values of the hysteresis parameter (H) can be determined and are substituted substitutable in the control computer.
  5. Air conditioning system according to one of claims 1 to 4, characterized that the mixing default curve is fixed by the initial programming Computer is deposited.
  6. Air conditioning system according to one of claims 1 to 5, characterized in that one of the control cams ( 1 ) matches the mix default curve.
  7. Air conditioning system according to one of claims 1 to 6, characterized in that one of the control curves ( 2 ; 2 ' ) regionally, preferably in a curved area ( 22 ) average heating power, is determined by the setting algorithm based on the mixing default curve and the hysteresis parameter (H) and in particular in a curve area ( 21 ) low heating power and / or in a curved area ( 23 ) of high heating power according to a fixed in the control computer stored Ausregelkurve runs.
  8. A method for temperature control of an air conditioning system of a motor vehicle, in which by means of an air mixing device cold air and hot air is mixed and a mixing position of the air mixing device is controlled by a control computer taking into account a hysteresis parameter, characterized in that the process sequence is specified by the control computer as follows: - the mixing position ( X) of the air mixing device is controlled according to a desired heating power (L) and - in order to compensate a hysteresis of the air mixing device, the mixing position (X) in a mixed position change to increase the heating power (L) according to a first control curve ( 1 ) and - in a mixed position change to reduce the heating power according to a second, compared to the first control curve ( 1 ) different control curve ( 2 ; 2 ' ) - and at least one control cam ( 2 ; 2 ' ) at least in some areas on the basis of a mixing default curve ( 1 ) and a hysteresis parameter (H), - wherein for changing the control curve ( 2 ; 2 ' ) variable values of the hysteresis parameter (H) after the initial programming in the control computer are stored in their value assignment of mixed position (X) after the nominal heating power (L).
  9. A method according to claim 8, characterized in that at an initial operation of the plant or a calibration run a basic plant value of the hysteresis parameter (H) and in the associated control computer is filed.
  10. A method according to claim 8 or 9, characterized in that Variant values of the hysteresis parameter (H) via change programming on one Input interface changed can be stored in the control computer.
DE200410020137 2004-04-24 2004-04-24 Air conditioning system of a motor vehicle and method for operating an air conditioning system of a motor vehicle Expired - Fee Related DE102004020137B4 (en)

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DE200410020137 DE102004020137B4 (en) 2004-04-24 2004-04-24 Air conditioning system of a motor vehicle and method for operating an air conditioning system of a motor vehicle

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DE200410020137 DE102004020137B4 (en) 2004-04-24 2004-04-24 Air conditioning system of a motor vehicle and method for operating an air conditioning system of a motor vehicle
PCT/EP2005/004220 WO2005102749A1 (en) 2004-04-24 2005-04-20 Air-conditioning system of a motor vehicle and method for operating an air-conditioning system of a motor vehicle

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DE102004020137B4 true DE102004020137B4 (en) 2006-05-11

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