Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
  • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
  • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
  • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
  • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
  • F02D11/106—Detection of demand or actuation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
  • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
  • F02D41/2425—Particular ways of programming the data
  • F02D41/2429—Methods of calibrating or learning
  • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
  • F02D41/2464—Characteristics of actuators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/02—Circuit arrangements for generating control signals
  • F02D41/14—Introducing closed-loop corrections
  • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
  • F02D2041/141—Introducing closed-loop corrections characterised by the control or regulation method using a feed-forward control element
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
  • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
  • F02D41/2425—Particular ways of programming the data
  • F02D41/2429—Methods of calibrating or learning
  • F02D41/2438—Active learning methods
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D41/00—Electrical control of supply of combustible mixture or its constituents
  • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
  • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
  • F02D41/2425—Particular ways of programming the data
  • F02D41/2429—Methods of calibrating or learning
  • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions

Definitions

• the present invention relates to an adaptive positioning ⁇ method of an actuator, in particular a throttle valve of an internal combustion engine.
• Throttle valves with bearing feedback in internal combustion engines are operated by means of control and regulating algorithms. These algorithms ensure precise and fast ⁇ le adjustment of the driver requested target position of the throttle valve. This is pre- ⁇ ben, for example, by the deflection of the accelerator pedal by the driver of a motor vehicle.
• the target position of the throttle valve is characterized by a control value.
• This control value is composed of a pilot control value and a controller intervention of a feedback controller on the throttle valve.
• a feedback controller on the throttle valve.
• the Pilot has the advantage over the scheme the advantage that it is proactive and inherently faster SET ⁇ len of the throttle valve or actuator allows.
• the ratio between the pilot control value and position of the adjusting member ⁇ or throttle position is influenced by manufacturing tolerances, environmental influences and aging. For one exact knowledge of the pre-control value required for a flap position is therefore necessary to adapt it.
• DE-A-36 12 905 C2 discloses an adaptive control in which the sensor values belonging to the end stops are learned. There is a linear interpolation between the sensor values of the end stops in order to determine the pairs of values between them.
• DE-A-35 10 176 A1, DE-A-40 05 255 C2 and DE-A-36 12 905 C2 describe a further control alternative.
• the control value for a requested desired position is taken from a map. Does the position achieved by the control value does not match the Sollpo ⁇ sition match, an appropriate readjustment.
• the readjustment is stored in a correction characteristic and followed in the further process the map. In this way, the cost of readjustment should be reduced.
• this correction characteristic also takes into account boundary conditions, such as the temperature.
• Specifying a target position by egg adaptively positioning method of an actuator, in particular ⁇ sondere of a throttle valve of an internal combustion engine, comprising the steps of setpoint and selecting a pilot value for the actuator to reach the target position, setting a pilot position of the actuator according to the pilot value and comparing the pilot position of the actuator with the target position, controlling the pilot position until reaching the target position corresponding to an adapted control value, and storing the adapted control value as Vor ⁇ tax value as a function of the desired position.
• adaptively positioning method of an actuator in particular ⁇ sondere of a throttle valve of an internal combustion engine, comprising the steps of setpoint and selecting a pilot value for the actuator to reach the target position, setting a pilot position of the actuator according to the pilot value and comparing the pilot position of the actuator with the target position, controlling the pilot position until reaching the target position corresponding to an adapted control value, and storing the adapted control value as Vor ⁇ tax value as a function of the desired position.
• a desired position of the throttle valve is predetermined via a desired value.
• a desired position of the throttle valve is predetermined via a desired value.
• To achieve this target position as quickly as possible for example, takes the Motorsteue ⁇ tion a map one allocated to the target position pilot value.
• This pre-control value serves to reach the desired position of the throttle valve as quickly as possible without additional, time-consuming control interventions. After reaching the pre-control value corresponding pilot position of the throttle valve this is compared with the desired position to perform an accurate adjustment of the throttle valve in the desired position Posi ⁇ tion.
• the result of this control is a measured adapted control value, which specifies the desired setpoint position, when the setpoint and pilot control position coincide.
• the adapted control value is stored as a pilot value in From ⁇ pendence from the desired position or stored. It follows that readjustment of the precontrol value is superfluous in the case of the next request by the driver for the same desired position, because now the precontrol value already corresponds to the adapted control value for reaching this target position. However, should the comparison step again provide a lack of agreement between the desired position and the pilot position, the readjustment of the pilot value and thus of the adaptable control value takes place again.
• the desired position is stored as a function of the adapted control value and an inversion of this relationship in order to obtain the adapted control value as a function of the desired value representing the desired position.
• Tax values relative to a specific actuator defi ⁇ kidney so that the future regulatory burden is reduced.
• the adapted control value is performed in egg ⁇ nem map. It is also preferred to store the adapted control value within this characteristic field as a function of the setpoint value and at least one boundary condition of the actuator, in particular a pressure reference at the throttle valve, a temperature and / or an air mass flow.
• FIG. 1 illustrates a preferred embodiment of the method according to the invention.
• FIG. 2 simply illustrates the correlation between the
• FIG. 3 contains the inverted relationship from FIG. 2, which represents the precontrol value as a function of a nominal value corresponding to a required target position of the throttle valve.
• FIG. 4 shows a simplified flowchart of an embodiment of the present method.
• the present invention discloses an adaptive positio ⁇ nierclar an actuator, which is explained on zeugs embodiment of a throttle valve of an internal combustion engine of a motor driving ⁇ .
• a driver of the motor vehicle requests by deflection of the accelerator pedal to a certain torque of the internal combustion engine.
• This torque corresponds to an opening angle or a target position dr_pos_soll of the throttle valve, which is identifiable with a nominal value.
• An engine control of the internal combustion engine for example, converts this desired value into the desired position dr_pos_soll of the throttle valve.
• the rela ⁇ ship between setpoint and the position of the throttle that can be achieved, however, is not ideal, so crizspiels- as manufacturing tolerances, drift, aging and / or thermal fluctuations prevent immediate reaching the set position with the sole target of the reference. Therefore, to achieve the desired position, a pre-control value is initially selected with which the throttle valve can already be guided or adjusted as close as possible to the desired position.
• a pilot position near the Sollpo ⁇ sition is thus started up or stopped.
• the pre-control position is compared with the requested setpoint position.
• a control intervention by a position controller of the throttle valve takes place until the pilot position corresponds to the requested target position.
• the pilot position is measured into the set position of the control value required for this position as an adapted control value.
• Nachfol ⁇ quietly is the pilot value of this target position dr_st overwritten by the respective one of said set position adapted control value and stored.
• the adapted control value can also be referred to as corrected precontrol value dr_pos_vorst_korr.
• dr_pos_vordef_l at ⁇ play position 1 one of these represents predefi ⁇ -defined points.
• the corresponding pilot control value is dr_vorst first a pilot position of the throttle seiklappe before.
• a presence of sta ⁇ bilen operating point of the throttle valve may be considered dr_pos_stab_l, the predetermined desired position dr_pos_soll and the previous adap- oriented control value or the corrected pilot value dr_pos_vorst_korr_l (see below ).
• the precontrol value dr_vorst and a control component dr_rgl therefore enter the control value dr_st for reaching the desired position dr_pos_soll.
• the control component dr_rgl of the present method ver ⁇ equalizes the desired position of the throttle valve dr_pos_soll with the actual position of the throttle valve dr_pos_ist and regulates so long until the actual position dr_pos_ist with the Sollposi ⁇ tion dr_pos_soll matches.
• the adapted control value dr_st results from the combination of the precontrol value dr_vorst and the control component dr_rgl. This game can be as measured at ⁇ than actual tax value as soon as the requested target position is reached.
• the adap ⁇ t Of control value dr_st is stored after an optional filtering as a new or corrected pilot value dr_pos_vorst_korr_l for the target position 1 in the non-volatile memory.
• the value to be stored is preferably the result of a weighted average of the old value and the value present.
• the goal of filtering is noise minimization and reducing or eliminating shot-to-shot deviations.
• the result of the present method is an adapted stored correlation between the throttle valve position dr_pos_ist and the adapted control value or the corrected precontrol value dr_pos_vorst_korr.
• the Drosselklappenposi ⁇ tion corresponds to this process time both to ⁇ required setpoint dr_pos_soll and the actual position dr_pos_ist.
• the correlation is shown in FIG. in which the arrows illustrate possible variations due to multiple measurements at the same setpoint position.
• FIG. 3 shows the precontrol value dr_vorst on the ordinate, which is composed solely of the corrected precontrol value dr_pos_vorst_korr or the adapted control value or from this value and further influences (see above).
• the pre-control value dr_vorst is plotted as a function of the setpoint of the requested setpoint position dr_pos_soll.
• the adapted vomit ⁇ cherten correlations are preferred, depending on Druckdif ⁇ ferenz stored temperature and / or mass flow at the throttle valve.
• an interpolation over the already existing measuring points is used for the calculation of the corrected precontrol value from the desired value of the requested nominal position.
• the interpolation points for this interpolation are either predefined (see the above application of the method to the predefined position 1 dr_pos_vordef_l) or are continuously optimized by means of a subordinate optimization routine.
• the environmental conditions are used as support points in addition to carry out a multi-dimensional interpolation.
• FIG. 4 again shows a schematic diagram of a flow diagram of the adaptive positioning method according to the last-mentioned functional variant.
• a predefined setpoint value is a first throttle position with HII fe known pilot values and a position controller to the required on ⁇ set position adjusted.
• the control value resulting from feedforward control and position control is measured.
• This resulting control value that can also be described as the current control value in the current operating point of the throttle valve is stored as a new tax value corresponding to the approached target position Ich ⁇ .
• an adaptation of the vorlie ⁇ ing pilot control is repeated for further predefined setpoint values or setpoint positions.
• Characterized a plurality of support points is selectively generated in the adjustment of the throttle valve, Erwert from, for example, by inter-polation ⁇ a correlation between the corrected Vorsteu- and the target values of the throttle valve is derivable over the entire adjustment range of the throttle valve.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
• Control Of Position Or Direction (AREA)
• Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38091772

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Family Cites Families (20)

• 2006
  • 2006-02-21 DE DE102006008051A patent/DE102006008051B3/de active Active
• 2007
  • 2007-02-19 WO PCT/EP2007/051555 patent/WO2007096327A1/de active Application Filing
  • 2007-02-19 US US12/280,065 patent/US7905213B2/en active Active
  • 2007-02-19 EP EP07704636A patent/EP1989422A1/de not_active Withdrawn
  • 2007-02-19 CN CN2007800060509A patent/CN101384808B/zh active Active

Non-Patent Citations (1)

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