WO1992005354A1 - Verfahren und vorrichtung zur steuerung und/oder regelung einer betriebsgrösse einer brennkraftmaschine - Google Patents
Verfahren und vorrichtung zur steuerung und/oder regelung einer betriebsgrösse einer brennkraftmaschine Download PDFInfo
- Publication number
- WO1992005354A1 WO1992005354A1 PCT/DE1991/000729 DE9100729W WO9205354A1 WO 1992005354 A1 WO1992005354 A1 WO 1992005354A1 DE 9100729 W DE9100729 W DE 9100729W WO 9205354 A1 WO9205354 A1 WO 9205354A1
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- WIPO (PCT)
- Prior art keywords
- adaptation
- characteristic
- characteristic curve
- variable
- operating
- Prior art date
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Classifications
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- 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
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- 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
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- 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
Definitions
- the invention relates to a method and a device for controlling and / or regulating an operating variable of an internal combustion engine according to the preambles of the independent claims.
- transmission elements such as, for example, electrically actuated actuators
- the relationship between the input and output variable or, in the case of an actuator, between the electrical control variable and the operating variable or a variable influencing this operating variable, which is determined by such a transmission element, can be represented as a characteristic diagram or characteristic curve.
- This characteristic diagram or this characteristic curve is exposed to influences which have a changing effect on the characteristic diagram or characteristic curve, so that the control and / or regulation of the operating variable operates outside of its working point provided in normal operation, possibly at the edge of its signal range.
- this can lead to incorrect control and / or regulation work, which in particular has negative effects on the stability, accuracy and / or dynamics of the control and / or regulation.
- Such influences can be seen, for example, in the case of an actuator as a function of the actuator characteristic or the characteristic map from the temperature of the actuator winding.
- the winding of the actuator takes up a larger current with the same control signal size than with a heated actuator, so that with the same control signal size a different value of the operating variable or the variable influencing it is set.
- DE-OS 34 15 183 therefore starts from an electromagnetic actuator with a predetermined characteristic curve, which is used in an idle speed control for the air supply to the internal combustion engine, measures for adapting the actuator characteristic curve.
- This adaptation makes a comparison between the setpoint calculated by the controller and the measured actual value of a variable influenced by the actuator and, depending on the comparison result in the working branch of the characteristic curve, which is largely linear, independently of one another (Offset adaptation) and slope (slope adaptation).
- Offset adaptation and slope (slope adaptation).
- DE-OS 34 15 183 defines release conditions for the offset and slope adaptation, which are related to each other.
- the offset adaptation described there is only able to carry out a correction of the characteristic curve at a single operating point. In operating states in which the influences on the actuator characteristic curve change quickly, the course of the adaptation is therefore unsatisfactory. In such an operating state, the offset adaptation designed for rapid correction works continuously.
- a transfer of the known actuator characteristic curve adaptation to pressure-controlled systems i.e. Systems which obtain the load information required to determine the injection quantity to be metered on the basis of a signal representing the pressure in the intake pipe are not possible.
- an excessively high load value is determined from the pressure signal, since the pressure signal delivers a correct load signal only after several work cycles.
- An adaptation carried out in this transition area would be faulty and possibly lead to undesired operating states.
- the invention is therefore based on the object of specifying measures which improve the adaptation of a control or regulating an operating variable of an internal combustion engine to changing operating conditions.
- a further improvement of this characteristic map or characteristic curve adaptation is achieved in that a long-term adaptation of the pivot point (A) lying outside the characteristic map or the characteristic curve is carried out to adapt to actuator-specific circumstances.
- Such an actuator for controlling the throttle valve of an internal combustion engine in connection with an electronic accelerator pedal is known from DE-OS 36 31 283.
- the procedure according to the invention leads to an adaptation of the characteristic diagram or the characteristic curve of the transmission element or the actuator, which does not adversely affect the operating behavior of the internal combustion engine when rapidly adapting to changing operating conditions, since the separate adaptation known from the prior art for actuator characteristic curves there is no offset and slope and only one parameter of the characteristic curve or the characteristic map is adapted to the changing operating conditions.
- FIG. 1 shows a general overview block diagram of a control system using the example of an idle speed control with actuator characteristic curve adaptation
- FIG. 2 shows an exemplary characteristic curve and the effects of the characteristic curve adaptation
- FIG. 3 shows a detailed block diagram for the characteristic curve adaptation
- FIG. 4 a flow diagram is shown which illustrates the adaptation of the characteristic curve as a sketch of a computer implementation.
- FIG. 5 shows pivot point and slope adaptation using a characteristic diagram
- FIG. 6 shows an exemplary embodiment for pivot point and slope adaptation in the form of an overview block diagram
- FIG. 7 a flow chart shows a sketch of a realization of the pivot and slope adaptation in the form of a computer program. Description of exemplary embodiments
- a computing unit 10 is provided, which includes, among other things, a controller unit 12, an adaptation unit 14 and a storage or computing unit 16.
- the control unit 12 is transmitted via the input line 18 to 20 operating parameters of the internal combustion engine or the motor vehicle, not shown, which are determined by corresponding measuring devices 22 to 24. These operating parameters are the parameters which are familiar from the prior art and are necessary for controlling and / or regulating the size of the company. In the case of an idle speed control, these are in particular speed, engine temperature, battery voltage, a load detection signal, idle state signal, etc.
- the controller unit 12 uses the operating parameter values supplied to it to determine a target value for the rotational speed, which it compares with the currently measured actual rotational speed, and from the difference a predetermined value V for a variable characterizing the air throughput through the internal combustion engine, such as, for example, air volume. Air mass, pressure in the intake pipe or throttle valve position are determined, which is delivered via the output line 26 of the controller unit 12 both to the adaptation unit 14 and to the storage or calculation unit 16.
- control or computation unit 16 uses a calculation rule that represents the inverse characteristic curve in accordance with FIG.
- Signal variable C is calculated or a control signal value l * is determined for the actuator by means of the inverse actuator characteristic curve stored there in table form and is output via the output line 28 of the computing unit 10 to an output stage circuit 30 for an actuator 32 which directly or indirectly influences the operating variable.
- the actuator 32 is an actuator influencing the air supply to the internal combustion engine or the fuel supply to the internal combustion engine, such as throttle valve or bypass actuator or, in the case of a diesel internal combustion engine, a control rod.
- the actuator characteristic curve of the actuator 32 which forms the assignment of the control signal £ to the size of the operating variable to be controlled and / or regulated or a signal representing it, is in the case of a so-called winding rotary actuator for influencing the air supply to the internal combustion engine as in FIG. 2a darge ⁇ , executed.
- the inverse actuator characteristic curve shown in FIG. 2b is derived from this. This is stored in the storage and calculation unit 16, for example as a calculation rule or in table form.
- a measuring device 34 which is connected to the actuator 32, the actual variable of the operating variable influenced by the actuator 32 is measured and supplied to the computing unit 10 or the adaptation unit 14 via the line 36.
- the size Q determined by means of the measuring device 34 for the air flow to the internal combustion engine is the air quantity, air mass, intake pressure and / or throttle valve position currently supplied to the internal combustion engine, while the measuring device 34 itself correspondingly is an air quantity, air mass meter , Pressure sensor or throttle position transmitter.
- the adaptation unit 14 receives information via corresponding input lines 38 to 40 from corresponding measuring devices 42 to 44 fed over the operating state of the internal combustion engine.
- the setpoint V is fed to the adaptation unit 14 via the line 27, which connects the adaptation unit 14 and line 26 to one another.
- This relates in particular to information relating to the starting and idling state of the internal combustion engine, a load signal and the battery voltage.
- the measuring devices 42 to 44 can be identical to the corresponding measuring devices 22 to 24, which have been described in connection with the control unit 12.
- the characteristic curve parameters determined as a function of their input signals by the adaptation unit 14 are transmitted from the adaptation unit 14 to the memory or calculation unit 16 via the line or bus connection 46 connecting the adaptation unit and the memory or calculation unit 16
- the inverse characteristic curve which is shown in the memory or calculation unit 16 as a calculation rule or in tabular form, is changed or adapted in accordance with the values given by the adaptation unit 14 via the line 46.
- the arrangement according to FIG. 1 is in principle conceivable for all control and / or regulating systems of the internal combustion engine which have an actuator with characteristics that can be changed by external influences.
- the procedure according to the invention can also be applied to an actuator of an electronic engine power system, ie an electronic accelerator pedal.
- the arrangement can advantageously be transferred to a speed control system, the setpoint V and the actual value Q in this case representing the variable representing the speed of the internal combustion engine.
- an actuator characteristic curve is plotted, for example, as is given for a single-phase turntable equipped with a single-phase motor or for a double-turn rotary actuator equipped with a two-phase motor. These are used in particular as a bypass controller for idle control. However, the procedure according to the invention can advantageously also be applied to other characteristic curve shapes.
- the actual air supply Q supplied by means of the opening cross section of the actuator is plotted in FIG. 2a over the control signal size.
- the solid line 100 represents the characteristic of the actuator 32. In the right part there is an area with a straight course of the characteristic, which is the working branch of the actuator. This branch of work is preferably considered in connection with the representation of the procedure according to the invention. It can be described mathematically by a straight line equation with a positive slope S and a negative intercept A (see straight line 101 shown in broken lines).
- This axis section A represents a value by which the amount of air flowing through the actuator for a certain control signal size is less than this amount of air if the characteristic line would pass through the zero point of the / 2 " 7Q system.
- This axis Sen section thus represents a constructive point of the respective actuator.
- the axis section A is still subject to changes caused by the actuator-specific or internal combustion engine-specific leakage air, i.e. the amount of air supplied, which cannot be influenced by the actuator. These cause the characteristic axis section A to move upward.
- the air flow increases again after a horizontal branch until a fixed value, the so-called emergency running cross-section, is reached, which allows the internal combustion engine to operate when the control signal or servomotor fails.
- FIG. 2b shows the inverted characteristic curve 100 ' derived from the characteristic curve according to FIG. 2a, in which the control signal magnitude is plotted against the default value V determined by the control unit 12.
- the inverse working branch is also characterized by slope S and axis section A ' (see straight line 101 * shown in broken lines).
- the quantities or parameters characterizing the characteristic curves correspond in terms of amount. This correspondence is disturbed by the influences described above.
- 3 shows an exemplary embodiment of the adaptation unit 14.
- the unit 14 shown in broken lines has, as input lines, the lines 27 and 36 already described with reference to FIG. 1, on which the default values V determined by the controller unit 12 and the determined actual values Q are supplied become.
- the difference between the specified and actual values is formed in a comparison point 150 and the difference value is forwarded on a line 152 to an integration unit 156 via a switch 154.
- the switching unit 154 is activated by a signal supplied via the line 158 and determined in an evaluation unit 160.
- the following input variables are fed to the evaluation unit 160 in order to form the activating signal.
- a signal representing the idle state of the internal combustion engine is supplied from an idling detection circuit 162 via the connecting line 164, while a signal representing the load of the internal combustion engine is determined by the measuring unit 166 and is transmitted via the connecting line 168, the threshold switch 170 and the Connection line 172 is forwarded to the evaluation unit 160.
- There is also a determination unit 174 for the starting state of the internal combustion engine which is connected via a line 176 to the evaluation unit 160 and also to a further switching unit 178. The signal generated by the determination unit 174 is processed negatively in the evaluation unit 160.
- a second input of the integrating device 156 forms the connecting line 180, which connects the integrating unit 156 to the switching unit 178.
- the switching unit 178 is also linked via a connecting line 182 to a memory element 184, in which an initialization value of the integration unit 156 is stored.
- the output line 186 of the integration unit 156 is via a limiter 188 and a unit for battery voltage correction 190 guided, which on the other hand is connected via a line 192 to a measuring device 194 for detecting a battery voltage value.
- the output line 196 of the unit 190 connects the adaptation unit 14 to the storage or calculation unit 16 of the inverse actuator characteristic.
- the adaptation unit 14 is activated when the switching unit 154 closes.
- the conditions that must exist for activation of the adaptation indicate the operating states of the internal combustion engine, while the adaptation can be carried out.
- the function of the evaluation unit 160 therefore corresponds to a logical AND function.
- the internal combustion engine must be in a stable idling state. This is determined by the measuring unit 162, for example by detecting the closing of the idle switch of the throttle valve and the expiry of a subsequent predetermined time.
- the starting case of the internal combustion engine is excluded by the negated evaluation of the start signal determined by the unit 174.
- the signal of the quantity Q representing the air flow rate cannot be used for adaptation.
- a further condition is specified by the threshold switch 170, the load signal determined in the measuring unit 166 having to be below a load threshold specified by the threshold switch 170.
- This measure limits the adaptation to operating areas with supercritical pressure conditions in the intake system.
- the characteristic curve of the actuator is independent of the pressure difference between intake pressure and external pressure.
- Supercritical conditions exist when the ratio of intake manifold pressure and external pressure is less than a predetermined value. If all three of the above-mentioned conditions are present at the same time, the evaluation unit 160 activates the adaptation via its output line 158 by closing the switching unit 154. This makes it possible to use the procedure described below even for pressure-controlled systems.
- the switching unit 178 is closed, so that the integration unit 156 is set to its initialization value stored in the memory element 184.
- the difference formed from the preset and actual value is fed via line 152 to the integration unit 156.
- the output signal is limited by the limiting unit 188 to physically meaningful values.
- the output signal of integration unit 156 is corrected as a function of the battery voltage via a battery voltage-dependent characteristic or a link to a battery voltage-dependent value.
- the adaptation value present on the output line of the adaptation unit 14 is then, as explained below, processed in the memory or calculation unit 16 to correct the inverse actuator characteristic.
- the characteristic curve 100 in FIG. 2a consists of several areas, one area having a straight course above a control signal quantity tT.
- the current which determines the position of the actuator and thus the size of the operating variable of the internal combustion engine to be controlled as a function of the control signal * _, is temperature-dependent via the winding resistance of the actuator drive. Furthermore, it shows a battery voltage dependency.
- the axis section A of the characteristic curve 100 is independent of the influences outlined above.
- the adaptation of the characteristic curve to the changes acting on it as a result of the influences described above is therefore achieved by adapting the slope S of the straight-shaped part of the characteristic curve by rotating this part of the characteristic curve around the fixed, motor-specific axis section A (see FIG. 2a. dash-dotted characteristic curve 102 or, Fig. 2b characteristic curve 102).
- the integrator 156 or its output signal represent a measure of the change in the characteristic curve, since they were formed in the idle state as a function of the current change, which can be derived from the deviation between the preset V and the actual value Q.
- the integrator output signal which may be corrected as a function of the battery voltage and carries the information about the changes acting on the characteristic curve, thus corresponds to the necessary change in the characteristic curve slope to adapt the characteristic curve to the influences described above.
- FIG. 4 clarifies the procedure according to the invention, which was shown on the basis of the block diagram of FIG. 3.
- step 200 After starting the program part, a check is made in step 200 as to whether the internal combustion engine is in a starting state. If this is the case, the system is initialized in accordance with step 202. The initialization preferably consists in fixing the integrator to its initial value. The program section is then ended and restarted.
- step 200 Has it been decided in step 200 that the start phase has expired, i.e. the internal combustion engine is outside of its starting state, a check is carried out in step 204 to determine whether the internal combustion engine is in a stable idling state. If this is not the case, steps 200 and 204 are repeated until the stable idle state has occurred.
- the control unit 12 calculates the preset value V for the operating variable to be controlled according to step 206 from its input signals. In step 208, it is queried whether the above-mentioned conditions for carrying out the characteristic curve adaptation exist. If this is not the case, the control signal variable Hs is calculated in step 210 in accordance with the above-mentioned equation of the inverse characteristic curve or is read out with a stored characteristic curve and the program part is ended and restarted.
- step 212 the difference between the preset V and the measured actual value Q of the operating variable to be controlled is calculated in step 212.
- a query can then follow, with the aid of which it is checked whether the difference between these values is within a predetermined value range (step 213). If this is the case, no adaptation is made and the process continues with step 210.
- This The measure is intended to prevent the adaptation from responding to small deviations and thus prevent the adaptation from working continuously.
- Step 213 can also include a query that checks the temporal constancy of the difference value.
- the condition can be preceded by the adaptation that the difference between the preset V and the actual value Q must be constant for a certain time. Otherwise, the process continues with step 210.
- step 213 which is not necessarily present but is advantageous, the difference is integrated in step 214.
- the integration result is finally subjected to a limitation in step 216, which limits the integration result to a maximum or minimum for negative integrator values.
- the limited integration result is corrected according to step 218 by, for example, multiplication with a value dependent on the battery voltage, so that after step 218 the integrator value represents a measure of the above-described, changing effects.
- the integrator value present after step 218 is then regarded as the new slope of the inverse characteristic curve according to step 220.
- step 222 the output signal variable £ is calculated in accordance with the equation outlined above of the inverse characteristic curve from the fixed intercept A ' , ie the pivot point, and the newly determined slope S ' , which corresponds to the integration value determined by means of steps 214 to 218.
- the characteristic values are adapted in step 222 according to the new parameters and the control signal variable 2 is read out as a function of the controller output signal. The program section is then ended and restarted.
- a further advantageous application of the concept according to the invention is found in adapting the motor-specific axis section or pivot point to changing leakage air conditions.
- each actuator Due to the manufacturing tolerances of the individual components or as a result of adjustment measures, each actuator has a characteristic curve that characterizes this actuator.
- the above-described slope adaptation by rotation about an actuator-specific point of rotation outside the characteristic curve or the characteristic map enables the characteristic curve stored in the computer to be used to determine the control rate to be adjusted at one point.
- the slope adaptation therefore does not fully take into account the actuator-specific circumstances. If the operating point of the actuator is, for example, outside the reference point on which the slope adaptation is based, then a deviation of the actually set operating point from the specified operating point may still exist.
- a complete adaptation of the stored characteristic curve to the actuator-specific circumstances is achieved by the long-term adaptation of the fulcrum lying outside the characteristic curve or the characteristic diagram in conjunction with a slope adaptation.
- FIG. 5 shows the characteristic curve, known from FIG. 2a, of an idling actuator for influencing the air supply to an internal combustion engine.
- the control variable, the pulse duty factor, the actuator or the current flowing through the actuator is plotted on the vertical axis, while the vertical axis describes the set air quantity or mass.
- the characteristic curve 100 (solid line) was in its working branch for reference points _ ⁇ and
- the characteristic curve is not adapted, a deviation of the air quantity or mass actually set by the actuator and the air quantity or mass given on the basis of the stored characteristic curve is determined at any operating point ⁇ r, although the characteristic curve has been adapted for the reference point.
- the procedure is now as follows. If the deviation is found, the pivot point is changed (new pivot point A). This means a parallel shift of the working branch of the characteristic in the sense of an increase in the deviation (characteristic 300). Subsequently, the characteristic curve is adapted to the actuator-specific conditions at the operating point C (characteristic curve 302) by the above-mentioned adaptation of the slope. This ultimately saves a characteristic curve that takes into account the actuator-specific conditions. Since changes to the actuator do not occur very often during the operating time of the actuator, the pivot point adaptation is a long-term adaptation compared to the slope adaptation.
- a lowering ie. H. a downward shift of the pivot point can be provided.
- FIG. 6 shows, in the form of an overview block diagram, a first exemplary embodiment for carrying out the pivot adaptation in conjunction with a slope adaptation.
- the elements known from FIG. 3 are designated with the same reference symbols. With regard to their functioning, reference is made to the description of FIG. 3.
- the adaptation unit 14 additionally has a further switching element 400, which is connected to the line 36 via the line 401.
- the switching element 400 can be actuated via a connecting line 402 by release means 404.
- Another line 406 connects the switching element 400 to an input of a memory element 408.
- An output of the memory element 408 forms the line 410, which connects the memory element 408 to a node 412.
- the node 412 has the line 414 as the second input line, while its output line 416 connects the node 412 with a further node 418.
- Junction point 418 has line 420 as the second input line. Its output line 422 connects it to a calculation element 424.
- Line 414 forms an output line of calculation element 424, while line 426 is the output line of calculation element 424 and adaptation unit 14 itself.
- the line 420 connects a switching element 428 to the node 418.
- the other end of the switching element 428 is connected to a storage and calculation unit 432 via a line 430.
- the switching element 428 is connected via a line 434 to the release means 436 and can be actuated by the latter.
- the line 152, the lines 36 and 410 and a line 438 are supplied to the storage and calculation element 432 as input lines, the latter branching off from the output line 196 of the adaptation unit 14.
- the two output lines 426 and 196 of the adaptation unit 14 and the line 27 are fed to the calculation unit 16.
- the lines 27 and 426 are linked in a first connection point 440.
- the output line 442 of the logic element 440 becomes connected to line 196 via a link 444.
- the output line of the logic element 444 is the output line 28 of the calculation unit 16.
- the release element 404 closes the switching element 400 and the current actual value of the air quantity or mass into the storage unit 408 as a reference value Q transferred.
- the characteristic curve is therefore adapted for the stored reference value by adapting its slope.
- the adaptation of the pivot point A is now based on the following basic idea.
- the reference value for the air quantity or mass stored with the slope adaptation before the pivot point adaptation must remain part of the characteristic curve after completion of the pivot point adaptation with slope adaptation.
- an adaptation of the characteristic curve is to be achieved for the new operating point, so that the air quantity or mass actually supplied corresponds to the one specified for the reference point and the operating point via the adapted characteristic curve.
- the storage and calculation unit 432 determines the slope of a new characteristic curve, which includes both the reference point and the new operating point, on the basis of the reference point and the measured actual value of the air quantity or mass.
- the slope is calculated using the known characteristic equation on the basis of The nominal / actual value difference of the air quantity or mass supplied to line 154, the deviation of the measured value of the air quantity or mass supplied via line 36 from the reference value supplied via line 410 and the existing value supplied via line 438 Slope of the characteristic ("slope triangle").
- the storage and calculation unit determines the relative change in gradient ((new gradient - old gradient) / new gradient) from the calculated new and the known old gradient.
- the new pivot point is calculated by evaluating the relative slope change.
- the change in the pivot point results from the sum of the reference point value and the value of the previous pivot point, multiplied by the relative change in gradient.
- the release means 334 closes the switching element 428.
- a pivot point adaptation is carried out in a time window after the idle switch has been closed, the lower time threshold being selected in such a way that in the case of pressure-controlled systems the air quantities are falsified - or measured mass values is prevented by a still filled suction tube and the maximum value of the time window is selected such that the previously learned reference point remains valid.
- a successful slope adaptation must have been completed before the switching element 428 is closed, for example a certain time before activation of the pivot point adaptation, so that the learned reference value can form the basis for the further calculation.
- the current air quantity or mass value must be considerably larger than the stored reference value in order to ensure sufficient measurement accuracy by means of a sufficiently large difference.
- the shear conditions closed idle switch, increased speed
- a pivot adaptation in selected operating points.
- the calculation unit 424 which outputs a measure for the fulcrum on the lines 426 and 414, integrates the product formed in the junction 418 from the relative change in gradient during the gradient adaptation and the sum of the reference air quantity or mass value and currently existing pivot point, ie the necessary pivot point change calculated as shown above.
- the new slope is subsequently set using the slope adaptation described.
- the above-mentioned actuator characteristic equation is obtained by adding the setpoint given by the controller via line 27 and the point of rotation given via line 426, and then multiplying this sum by the slope of the characteristic line supplied on line 196.
- the calculation unit 16 then outputs on the line 28 a control signal which serves to set the desired value.
- FIG. 7 shows a further embodiment of the inventive concept in the form of a sketch of a computer program based on a flow chart. This embodiment is advantageous in terms of its simplicity.
- FIG. 7 shows elements which are already known from FIG. 4. These have the same reference symbols and fulfill the same function. With regard to their mode of operation, reference is therefore made to the description of FIG. 4.
- a step 500 queries whether the above-mentioned conditions for carrying out the pivot point adaptation are present. When the slope adaptation was successfully completed, the reference value was stored in step 213 in the event of a no decision. The conditions for carrying out the pivot adaptation are checked, for example, on the basis of moving counters and set marks. If the conditions for carrying out the pivot point adaptation are not present, step 502 is carried out after the query step 500, in which the control signal size is calculated on the basis of the calculated slope and pivot point values via the inverse characteristic curve.
- step 504 checks whether there is a difference between the setpoint and actual value of the air quantity or mass at the present operating point, which difference is greater than a predetermined value £ . If this is not the case, step 502 follows; in the opposite case, if there is a deviation, in step 506 an integrator, in which a measure of the change in the pivot point is stored, is changed by a predetermined value.
- the change in the integrator level is dependent on the sign of the deviation, and in an advantageous exemplary embodiment can be selected depending on the size of this deviation. It should be noted that the pivot point is always changed in such a way that a shift in the characteristic curve results in the sense of an increase in the deviation.
- step 508 the pivot point value used to calculate the drive signal size is set to the integrator level. Then, according to step 502, the control signal size is calculated and output. Since the pivot point is a measure of the amount of leakage air flowing into the internal combustion engine, values about this amount of leakage air can be derived from the stored learned pivot point for diagnostic purposes.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US07/856,918 US5293852A (en) | 1990-09-18 | 1991-09-14 | Method and arrangement for the open-loop and/or close-loop control of an operating variable of an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE4029537A DE4029537A1 (de) | 1990-09-18 | 1990-09-18 | Verfahren und vorrichtung zur steuerung und/oder regelung einer betriebsgroesse einer brennkraftmaschine |
DEP4029537.0 | 1990-09-18 |
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WO1992005354A1 true WO1992005354A1 (de) | 1992-04-02 |
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PCT/DE1991/000729 WO1992005354A1 (de) | 1990-09-18 | 1991-09-14 | Verfahren und vorrichtung zur steuerung und/oder regelung einer betriebsgrösse einer brennkraftmaschine |
Country Status (5)
Country | Link |
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US (1) | US5293852A (de) |
EP (1) | EP0505521A1 (de) |
JP (1) | JP2957279B2 (de) |
DE (1) | DE4029537A1 (de) |
WO (1) | WO1992005354A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4221768C2 (de) * | 1992-07-02 | 2002-11-07 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Verstelleinrichtung in einem Fahrzeug |
DE4302483C2 (de) * | 1993-01-29 | 2002-07-11 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine |
US5622053A (en) * | 1994-09-30 | 1997-04-22 | Cooper Cameron Corporation | Turbocharged natural gas engine control system |
US5786999A (en) * | 1995-10-04 | 1998-07-28 | Barber-Colman Company | Combination control for injection molding |
DE19740186A1 (de) * | 1997-09-12 | 1999-03-18 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Regelung einer Betriebsgröße eines Fahrzeugs |
FR2775315B1 (fr) * | 1998-02-25 | 2000-05-05 | Magneti Marelli France | Procede et dispositif d'autoadaptation rapide de richesse pour moteur a injection avec sonde d'oxygene dans les gaz d'echappement |
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EP0976922B1 (de) | 1998-07-29 | 2006-01-04 | DaimlerChrysler AG | Verfahren zur Drehmomenteinstellung |
US6497223B1 (en) | 2000-05-04 | 2002-12-24 | Cummins, Inc. | Fuel injection pressure control system for an internal combustion engine |
KR100373143B1 (ko) * | 2000-09-25 | 2003-02-25 | 현대자동차주식회사 | 엔진 아이들 제어방법 |
US6881177B2 (en) * | 2000-10-18 | 2005-04-19 | Tae-Jin An | Handgrip |
JP4196535B2 (ja) * | 2000-11-02 | 2008-12-17 | トヨタ自動車株式会社 | 車両用制御装置および記録媒体 |
DE10215406B4 (de) * | 2002-04-08 | 2015-06-11 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung eines Motors |
DE102005007484A1 (de) * | 2005-01-25 | 2006-07-27 | Siemens Ag | U-Boot mit Unterwasser-Abgasausleitung bei Schnorchelfahrt |
US7007676B1 (en) | 2005-01-31 | 2006-03-07 | Caterpillar Inc. | Fuel system |
JP4316635B2 (ja) * | 2007-05-18 | 2009-08-19 | 三菱電機株式会社 | 内燃機関の制御装置 |
DE102010003423A1 (de) * | 2010-03-30 | 2011-10-06 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Vorrichtung zum Betreiben eines Energiespeichers |
DE102010003736A1 (de) * | 2010-04-08 | 2011-10-13 | Man Diesel & Turbo Se | Brennkraftmaschine und Verfahren zum Steuern des Betriebs der Brennkraftmaschine |
JP5287839B2 (ja) * | 2010-12-15 | 2013-09-11 | 株式会社デンソー | 燃料噴射特性学習装置 |
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FR2355437A6 (fr) * | 1972-05-10 | 1978-01-13 | Peugeot & Renault | Systeme de commande du type analogique-numerique-analogique a calculateur digital a fonctions multiples pour vehicule automobile |
EP0136449A2 (de) * | 1983-09-21 | 1985-04-10 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Adaption eines Stellglied-Kennlinienverlaufs |
EP0162203A2 (de) * | 1984-04-21 | 1985-11-27 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Adaption eines Stellglied-Kennlinienverlaufs |
FR2567962A1 (fr) * | 1984-07-23 | 1986-01-24 | Renault | Procede adaptatif de regulation de l'injection d'un moteur a injection |
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---|---|---|---|---|
US4672934A (en) * | 1983-09-21 | 1987-06-16 | Robert Bosch Gmbh | Method and apparatus for adapting the characteristic of a final controlling element |
DE3631283C2 (de) * | 1986-09-13 | 1999-11-25 | Bosch Gmbh Robert | Einrichtung zur gesteuerten Zumessung von Verbrennungsluft in eine Brennkraftmaschine |
-
1990
- 1990-09-18 DE DE4029537A patent/DE4029537A1/de not_active Withdrawn
-
1991
- 1991-09-14 EP EP91915575A patent/EP0505521A1/de not_active Ceased
- 1991-09-14 JP JP3514773A patent/JP2957279B2/ja not_active Expired - Fee Related
- 1991-09-14 US US07/856,918 patent/US5293852A/en not_active Expired - Fee Related
- 1991-09-14 WO PCT/DE1991/000729 patent/WO1992005354A1/de not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2355437A6 (fr) * | 1972-05-10 | 1978-01-13 | Peugeot & Renault | Systeme de commande du type analogique-numerique-analogique a calculateur digital a fonctions multiples pour vehicule automobile |
EP0136449A2 (de) * | 1983-09-21 | 1985-04-10 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Adaption eines Stellglied-Kennlinienverlaufs |
EP0162203A2 (de) * | 1984-04-21 | 1985-11-27 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Adaption eines Stellglied-Kennlinienverlaufs |
FR2567962A1 (fr) * | 1984-07-23 | 1986-01-24 | Renault | Procede adaptatif de regulation de l'injection d'un moteur a injection |
Also Published As
Publication number | Publication date |
---|---|
EP0505521A1 (de) | 1992-09-30 |
DE4029537A1 (de) | 1992-03-19 |
JPH05502495A (ja) | 1993-04-28 |
US5293852A (en) | 1994-03-15 |
JP2957279B2 (ja) | 1999-10-04 |
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