EP1312773A2 - Système pour compenser l'erreur de déphasage d'un arbre à cames à déphasage variable et méthode correspondante - Google Patents

Système pour compenser l'erreur de déphasage d'un arbre à cames à déphasage variable et méthode correspondante Download PDF

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Publication number
EP1312773A2
EP1312773A2 EP02023256A EP02023256A EP1312773A2 EP 1312773 A2 EP1312773 A2 EP 1312773A2 EP 02023256 A EP02023256 A EP 02023256A EP 02023256 A EP02023256 A EP 02023256A EP 1312773 A2 EP1312773 A2 EP 1312773A2
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EP
European Patent Office
Prior art keywords
speed
idle
signal
engine
camshaft
Prior art date
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Granted
Application number
EP02023256A
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German (de)
English (en)
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EP1312773A3 (fr
EP1312773B1 (fr
Inventor
Rolf Karcher
Gerhard Baur
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Audi AG
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Audi AG
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Filing date
Publication date
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Publication of EP1312773A3 publication Critical patent/EP1312773A3/fr
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Publication of EP1312773B1 publication Critical patent/EP1312773B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34436—Features or method for avoiding malfunction due to foreign matters in oil
    • F01L2001/34443—Cleaning control of oil control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/04—Timing control at idling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/05—Timing control under consideration of oil condition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors
    • F01L2820/041—Camshafts position or phase sensors

Definitions

  • the invention relates to a system for eliminating the deviation the actual angle of an adjustable, in particular continuously adjustable camshaft from one Predeterminable setpoint angle when an engine is idling, with one Control or regulating device for controlling or regulating the Camshaft position and a control unit for Motor control is provided.
  • the camshafts are idle non-overlapping position, i.e. the entrance is open the latest and the outlet on the earliest position of the Camshaft. Different positions of the camshaft lead to restless engine running, which however should be avoided should. For convenience and consumption reasons, the Idle speed should be as low as possible. Occurs at idle however at oil temperatures from 80 ° C for example a very strong deviation of the camshafts from the target angle. This Deviation usually takes place until the late stop of the Auslassstellers. In older engines, this deviation is from the target angle only at higher oil temperatures observe.
  • DE 197 22 187 A1 describes a control method an adjustable cam spread at one Internal combustion engine in motor vehicles known.
  • a electronic control unit is from a basic map a minimal cam spread pre-controlled.
  • a smoothness monitoring unit determines whether the minimal cam spread the internal combustion engine a smooth running limit exceeds.
  • a spread adjustment unit increases the set cam spread as long as the Quiet running limit is exceeded.
  • Object of this invention is to increase fuel consumption and royalty emissions minimize.
  • the spread adjustment unit increases the set minimum cam spread in case of restless Engine running.
  • a spread map for specifying a Setpoint of the cam spread is for the cheapest Environmental conditions, for example the lowest possible Ambient pressure or for vehicle operation in larger Designed for heights.
  • valve timing control system for an internal combustion engine in which the Maintain controllability of the valve timing and the The combustion state of the internal combustion engine remains stable should.
  • the valve timing control system includes one hydraulic actuator for changing an operating angle of a Camshaft cam to set a valve timing in the Advancing or decelerating the internal combustion engine.
  • DE 197 24 709 A1 describes a method for determination an optimal idling speed of an internal combustion engine known in which by gradually changing the Idle speed and comparison of old and new idle unrest an optimal idle target speed is determined. It finds an idle idle control due to speed fluctuations instead of. The idle target speed is regulated to ensure optimal operating behavior. While the method is reaching predetermined limit values the idle speed determined. One finds each gradual increase or decrease in idle speed instead of.
  • DE 195 34 844 A1 is based on an idle idle control Speed fluctuations thereby allow the gradient the course of the actual speed of the internal combustion engine determined and the manipulated variable for controlling the Idle speed depending on the amount of Gradient is determined when the amount of the gradient exceeds a predetermined threshold.
  • the DE 40 16 099 A1 describes a device for Idle speed control, where a valve to change the intake air quantity of the internal combustion engine and, among other things. a Device for controlling the degree of opening of the valve are provided according to the machine speed.
  • the DE 196 18 403 A1 discloses a control device for the Idle speed using an appropriate Sensors. The smoothness is at least based on signals an acceleration sensor arranged on the vehicle or a noise sensor provided in the vehicle interior determined.
  • Another method for adapting the characteristic of a Idle actuator is disclosed in EP 0 399 016 B1.
  • One procedure and one Device for idle idle control is also in the DE 44 43 652 A1 discloses.
  • Based on the comparison between a setpoint and an actual value for the speed a control deviation and manipulated variable are determined, whereby a pilot control and / or an increase in the setpoint in Depending on the speed is provided.
  • a Device for setting the course of movement of the Gas exchange valves of the internal combustion engine one Camshaft has a controller that provides a control signal for an actuator of an actuator for adjusting the Camshaft generated, the control signal is additive by Feedforward corrected. This serves a more comfortable Operation of the internal combustion engine also in transient operation and in the case of large dead times of the device for adjusting the Movement course of the gas exchange valves, these can be adjusted faster and the controller only Inaccuracies in feedforward control compensated.
  • EP 0 808 997 A1 and EP 0 990 775 A1 are more Adjustment options for camshafts are known. Are first and second camshafts and means for changing the Rotation phase of the first and second camshafts provided to a change in the opening and closing time curve of the To cause intake valves.
  • EP 0 990 775 A1 Influence on a three-dimensional cam of the camshaft taken and is an actuator for changing the valve lift provided by adjusting the positions of the camshaft along the axis of rotation of the three-dimensional cam, the valve lift through this three-dimensional cam is caused. It should be a suitable one Rotational speed of the internal combustion engine are generated.
  • the present invention is therefore based on the object a system to correct the deviation of the actual angle of the adjustable camshaft from a predetermined target angle to create in the idle of an engine, being just one strong deviation when idling at higher oil temperatures no longer occurs or is remedied.
  • the invention is based on the knowledge that Raising the speed the deviation of the target and actual angle is reduced.
  • The is particularly advantageous Idle speed increased via the engine control. It This results in the advantage of a smoother engine running even at higher oil temperatures at idle, which makes the Driving comfort, but also performance, emissions and the Vehicle consumption can be significantly improved.
  • the system activates the device for increasing the engine idling speed. In doing so, the limit is exceeded the oil temperature checked to be a slowly adjustable Camshaft with cold engine not to activate one To cause idle speed increase.
  • Raising the Idle speed is preferably carried out via the control unit for engine control.
  • the system thus serves to correct the Deviation of the actual angle from the nominal angle of the camshaft by increasing idle speed. Because the actual angle of the Camshaft position queried with the specifiable setpoint compared and an adjustment of the Camshaft position by increasing idle speed is made to the actual camshaft angle again to set the target angle is thus constantly Corrected camshaft position so that a Deviation of the actual angle from the target angle not or only in an approved tolerance range occurs.
  • the system of the invention can in any position Camshaft are used, so even at maximum Overlap and with no overlap position.
  • Control signal an adjustable actuator for rotating the Camshaft adjusted in relation to the crankshaft. That too calculating control signal is from a Basic control signal that any difference between the The actual position and the target position of the camshaft are assigned is one of the oil temperature and the speed of the Internal combustion engine dependent correction value and from a Adaptation value calculated.
  • the rotation of the camshaft will therefore not dependent on the idling speed of the Motor adjusted or the deviation of the actual angle from Target angle of the camshaft position for adapting Idle boost used.
  • the twist refers directly on the control of the camshaft without further Integration of the engine idling speed in the Control system.
  • Adjustable camshafts or a camshaft position control is also used in the prior art to control the Idle speed learning of an engine with internal Combustion used, as disclosed in DE 196 47 182 C2 or to control fuel injection as in the DE 196 35 042 C2.
  • the adjustable camshaft when controlling the Includes fuel injection according to DE 196 35 042 C2 also applying a compressive force to the camshaft and changing the rotational phase of the camshaft with respect to Synchronous pulley or crankshaft to a maximum Lead angle of a maximum lag angle so that the Closing control on the intake valves forward is moved.
  • the turning phase of the Camshaft with respect to the synchronous pulley maximum lag angle changed from maximum lead angle, so that the opening timing or the Opening timing of intake valves delayed is.
  • the learning value is based on the ratio real valve characteristic (actual cam angle) too the valve characteristics for the engine in full heated state compensated. So here, too, none Referenced to the engine idling speed since the Engine fuel injection is to be controlled.
  • Device for raising the idle speed a control unit and / or acts on the motor, in particular directly or via its control unit. This is not just the fastest, but also most direct way to act on given the idle speed.
  • the speed can preferably be increased continuously, as soon as a deviation of the actual angle from the target angle occured.
  • the device for Increasing the idle speed a continuous Speed increase from the speed at which the deviation occured. This increases the idle speed from a determinable value that is at least in is close to the desired idle speed. It must thus no adjustment from zero take place, what with a longer settling time would be connected.
  • a quantization of continuous Speeds is preferably freely selectable.
  • the Speed can be raised continuously.
  • an optional application-specific configurability of the system can be optionally provided.
  • angle detection device for recording the actual angle of the camshaft and delivering it of an actual angle signal is preferably an angle detection device intended. It is also preferred means for monitoring the exceeding of a Predefinable threshold value of the target angle / actual angle deviation and provided for emitting a signal.
  • the angle detection device and are particularly preferred the facility to monitor the exceeding of a Predeterminable threshold value can be coupled to one another, so that the Device for monitoring the exceeding of the Predefinable threshold value directly the current one Can query actual angle.
  • the Device for increasing the idle speed preferably an application-specific adaptive idling speed that learns emits.
  • the idle speed does not have to be fixed above the Oil temperature are stored, which would lead to that the worst engine in new condition is the idle speed specifies what a for all engines over the entire term would mean minimal speed, e.g. of 750 rpm.
  • Idle speed should be as low as possible, e.g. 560 rpm be.
  • Learning idle speed means in this Context that the condition of the camshaft from the idle speed currently approached is assessed. in the in most cases this will be the last to be approached Idle speed.
  • the states of powertrain, Brake system and motor queried by the system Before activating the active Idle speed boost the states of powertrain, Brake system and motor queried by the system. A release occurs when the drive train is without frictional connection and / or there is a brake actuation signal and the engine is in Idle. Is by clutch or gearbox, especially automatic transmission, the adhesion in Drivetrain separated, this can be done using the Detect the absence of a speed signal. is If the engine is idling, this information is System provided. The idle is defined by the There is no accelerator pedal actuation or such low accelerator pedal actuation that there is none Speed increase comes. The existence of the Brake (pedal) actuation signal to activate the Idle speed boost can be advantageously configured and leads to increased security.
  • the function may stop Security reasons should preferably be blocked.
  • a vehicle with an automatic transmission that from the transmission transmitted driving force increases with the engine speed, the vehicle standing on a slope could Put the gear into motion without applying the brake.
  • the activation of the idle speed increase can therefore then configurable, preferably user-specific take place when there is a brake actuation signal, regardless of the presence or absence of one Grip of the engine with the wheels - not gear "N" or "P" for an automatic transmission - regardless of the brake application.
  • Accelerator pedal actuation can be advantageous be excluded by querying idle.
  • an adaptation according to the invention can also in an area in which the speed due to the accelerator pedal actuated is greater than the idle speed, however still too low to hold the camshaft position. However, such a case is relatively unlikely.
  • control unit of the engine and / or the Device for increasing the idle speed before activation the idle boost the presence of a Engine system function signal and an allowable Engine status signal in the form of an enable signal. This ensures that there is no error in the Engine system is present and the engine status is set in this way is that acting on the idle speed is safe is possible.
  • An engine system function signal is preferably at There is no error signal in the brake actuation detection, in the absence of an error signal in the camshaft control, if there is one Release signal of the camshaft control issued.
  • On permissible engine status signal is preferred if present an engine idle signal and an engine speed signal below a predefinable speed threshold, in particular, 800 rpm. Because the idle speed boost is then active for security reasons, if there is no fault in the system and the engine is in the individual is in a predefinable state System and motor function parameters and their parameters Condition queried. To make sure that a Brake actuation signal is actually present is one Query provided that no electrical There is an error in the detection of the brake application.
  • the idle boost is preferably adapted Exceeding the deviation of the actual angle from the target angle the camshaft by a predeterminable value, in particular a value of 7 ° and when the actual angle runs away from Target angle and / or when the camshaft is close to your End stop and / or its late position, especially in an angle of 5 ° and when an error signal occurs over a predeterminable period of time, in particular longer than 0.1 seconds.
  • the system thus advantageously has one Query about adapting the idle boost to determine if there is actually a target angle / actual angle deviation the camshaft angle, especially permanent.
  • Threshold set depending on the selected application and in a particularly preferred embodiment can be 7 °.
  • the actual angle may run away from the target angle by providing a filtered actual angle and comparison of the filtered actual angle with the current one Actual angle.
  • a suitable filter is, for example a PT1 link.
  • this angle can be a value of 5 °. In other applications this can Value can be varied.
  • this angle can be a value of 5 °. In other applications this can Value can be varied.
  • an error signal via a predeterminable period of time occurs. This too it is recognized whether the target angle / actual angle deviation of the Camshaft angle a unique phenomenon or a is permanent condition that could be remedied.
  • a learned idle speed increase be reset, particularly preferred if present an oil temperature signal at engine start that is smaller as a predefinable and / or critical oil temperature threshold, e.g. less than 100 ° C and / or if the Power supply and / or erasing the fault memory of the Engine control unit.
  • a predefinable and / or critical oil temperature threshold e.g. less than 100 ° C and / or if the Power supply and / or erasing the fault memory of the Engine control unit.
  • a query as to whether at engine start the oil temperature is less than the critical oil temperature threshold is preferably with another query linked, which goes that a time delay of the Starting signal until the oil temperature signal is present takes place in order to ensure that the reset condition can be recognized reliably to ensure.
  • the critical oil temperature threshold can be selected for the specific application.
  • a break the voltage supply preferably also leads to a Resetting the system or at least the device for Raising the engine idle speed. In the event of an interruption the voltage supply can otherwise be caused by this Malfunctions and errors in the idle speed increase, in particular in relation to the learned values that it is safer to interrupt the Power supply the learned speed increase completely reset. Because for security reasons Error signals are also queried by the engine advantageous when deleting the fault memory of the engine control unit the learned speed increase is also reset.
  • the idle speed increase is carried out by everyone conditions described above preferably after following scheme:
  • a target idle speed value and the device to increase the idle speed preferably lifts the Idle speed value continuously with the specifiable Speed increase speed on.
  • this can Speed increase speed can be selected to 20 U / s.
  • Means for generating defined are preferred Speeds provided, in particular a quantization of the continuously raised idle speed over a Curve. This allows the idle speed only assume defined speeds, for example from the Noise development can be advantageous here.
  • Means for avoiding a conspicuous are also preferred gradually ramping up the idle target speed after the Quantization provided, especially slowed down Raise the idle speed via a ramp with a predetermined speed. This will make smoothing the quantized values of the idle speed, resulting in better driving comfort and more pleasant Noise leads.
  • the object underlying the invention is also achieved by a method for controlling an adjustable, in particular continuously adjustable camshaft one Internal combustion engine with a control or Control device for controlling or regulating the camshaft position is provided, solved when exceeding one Predeterminable value of the deviation of the actual angle of the Camshaft from the predetermined target angle, the device for Fix the deviation is activated and where the Installation on a control unit for controlling the engine acts to increase the idle speed.
  • the task is accomplished through a regulation process idle oil pressure using an adjustable, in particular continuously adjustable camshaft
  • an adjustable, in particular continuously adjustable camshaft one Internal combustion engine with a control or Control device for controlling or regulating the camshaft position is provided, solved when exceeding one Predeterminable value of the deviation of the actual angle of the Camshaft from the predetermined target angle, the device for Fix the deviation is activated and where the Installation on a control unit for controlling the engine acts to increase the idle oil pressure.
  • the position of the camshaft is an advantageous indicator for oil pressure.
  • a control device for controlling the Speed of an internal combustion engine especially for Use in a aforementioned system and / or in a the above methods, the object is achieved by that an input for capturing manipulated values of a adjustable camshaft, an input for the signal of the Cooling water temperature of a cooling water temperature sensor Input for the signal of the oil temperature Oil temperature sensor, an input for entering Speed values of a speed sensor, a means of Evaluate, an input for querying one or more other signal sources and at least one means for Affect the idle speed and / or the Engine idle oil pressure are provided.
  • This can by providing only one control unit Advantages of the invention can be achieved.
  • the signal source of the Idle operating state and / or the accelerator pedal position and / or an idle signal, especially one Engine management system is.
  • the signal from the setpoint generator can preferably be a map. This is one greater variability and therefore better adaptation to changing operating conditions possible.
  • Figure 1 shows two diagrams to illustrate the Speed curve if the camshaft position deviates an adjustable camshaft from a definable one Target angle. This is included in this embodiment constant 0 °. The actual angle initially increases over time weak, subsequently after a threshold value is exceeded SW strong.
  • the speed in revolutions shown in the second diagram per minute over time is at a camshaft angle of minus 20 ° at 560 rpm, which is an idle speed with smooth engine running and therefore good comfort and low Represents consumption.
  • the deviation Camshaft position no consequences regarding the Idle speed.
  • the deviation of the actual angle of the adjustable camshaft of the predetermined target angle represents the invention System to increase the idle speed determines that this Threshold was exceeded and the actual angle steadily increased in a less favorable position. He also receives especially from a limit switch, the information whether the camshaft position is close to its End stop, i.e. the late position. In the in Figure 1 embodiment achieved Camshaft position almost the end stop of 22 °. It is also queried whether the deviation of the target angle of the actual angle is greater than the predefinable threshold value. This can be done after the threshold value SW and the increase in the deviation over time is affirmed become.
  • Time period ⁇ t persists. This is also in the Given embodiment of Figure 1.
  • the time period ⁇ t can be set to 0.1 seconds, for example. she can have different values depending on the engine and application accept.
  • Idle speed increased in quantized steps after exceeding the time period ⁇ t Idle speed increased in quantized steps, initially to a specifiable speed of 650 rpm and below to a predetermined speed of 700 rpm.
  • the transition in the higher speed level occurs continuously via a ramp so as not to negatively affect driving comfort influence.
  • the idle speed increases from the speed at which the deviation occurred, that is in the application from 560 rpm.
  • the speed of the Increase in idle speed between the quantized stages, So the 650 and 700 U / min, can be set freely become. There is also a continuous increase in Idle speed possible.
  • the respective type of raising is freely adjustable depending on the application.
  • the idle speed is increased until the Camshaft position back to the original one Setpoint reached, in the case shown to one Angle drops from 0 °. This in turn becomes the threshold SW exceeded, but now towards the given one Target angle.
  • the system also queries this or recognized, whereby the continuous lifting of the Idle speed set and the idle speed to the meanwhile reached value, here 700 rpm, is held.
  • a control device 1 has an input 2 for Acquisition of the control values of an adjustable camshaft in particular by a phase encoder 11, an input 3 for the signal of the cooling water temperature, an input 4 for that Oil temperature signal, an input 5 for entering Speed values and an input 6 for detecting Signals from one or more other signal sources.
  • the Control unit receives via sensors, such as the phase encoder 11 adjustable camshaft 15, a speed sensor 14 of the Motors, a cooling water temperature sensor 12 and one Oil temperature sensor 13 signals and prepares them.
  • One in the control device 7 included for evaluation evaluates the prepared values and acts on actuators 10, which is an idle speed boost of an engine 9 effect such as an idle speed control device.
  • the implementation of the processed and evaluated values can control unit 1 via the throttle valve actuators, Ignition, injection (for idle speed control) and camshaft control valves.
  • a signal source for entering further signals via the input 6 of the control unit 1 can, for example, the Accelerator pedal position, an idle signal and the Idle operating state can be queried.
  • Speed sensor 14 for recording and delivering the idle speed values, Cooling water temperature sender 12, Oil temperature sensor 13 and phase sensor 11 of the adjustable Camshaft 15 are only indicated in FIG. 2. Instead of a single target angle, a is preferably used Set target angle map.
  • Figure 3 shows a flow diagram of the operation of a inventive system for increasing the idle speed of an internal combustion engine.
  • a first step continuously asking whether a deviation of the Actual angle from the target angle is greater than one predefined threshold value SW. Exceeds the deviation the threshold value is not exceeded, the query is continued. If the deviation exceeds the specified threshold, follows the query of a release signal. Is this also before, the idle speed increase is activated. However, the release signal is only available when a positive motor function signal and a permissible one Motor status signal present.
  • a fourth step initialize an idle speed value and then in a fifth step this continuously with a specified speed increase speed raised.
  • a sixth step is a quantization of the continuously increased speed via a characteristic curve performed.
  • the release signal is given when both a Engine system function signal as well as an allowable Engine status signal present. What factors these signals form, can be seen better in Figure 4a and b, the together represent a query scheme.
  • a process is shown in which the factors of Forming a release signal and determining one Deviation of the actual angle from the target angle of the camshaft, the A predetermined threshold value is exceeded Deviation and resetting of the control unit or Systems for increasing the idle speed are reproduced.
  • FIG. 4a it is for the presence of the release signal and thus to activate the idle speed increase required that either no traction in the driveline which is e.g.
  • the gear selector lever can be determined regardless of the actuation of the Brake pedal, or the brake pedal is operated, which e.g. queried by a sensor in the area of the brake pedal regardless of whether it is loaded or not one speed step. So it will be the correct state of the Speed step and brake queried.
  • the engine status signal such as it is also indicated in FIG. 3, is formed by that the engine is idling, so on Idle signal is present and that the engine speed is up is below a predetermined speed threshold. Likewise, the activity of idle speed control queried.
  • the engine system function signal is generated by the presence of a release signal from Camshaft control, that is an adjustment of the Camshaft is possible.
  • the idle speed increase is only activated when the deviation of the actual angle ⁇ actual from the target angle ⁇ target of the camshaft position exceeds a predefined threshold value SW. It is determined here whether the deviation has fundamentally exceeded this predetermined threshold value, that is to say is at least briefly higher than the predetermined threshold value. It is also checked whether the actual angle ⁇ actual runs away from the target angle ⁇ target . This is recognized by comparing the current actual angle with a filtered actual angle. A PT1 filter is suitable here as a filter. Alternatively, it can be checked whether the actual angle is greater than a predetermined limit angle.
  • the idle speed increase is activated.
  • the idle speed increase is adapted as long as there is a deviation of the actual camshaft angle from the desired camshaft angle. The system learns how far the increase has to be made in order to adjust the actual camshaft angle back to the originally specified nominal camshaft angle. If such an error occurs later when you continue driving, a corresponding camshaft angle control can be carried out directly. If the deviation of the actual camshaft angle from the target camshaft angle does not last longer than the specifiable time period ⁇ t, an idle speed reduction can be activated after a waiting period, provided the oil temperature is lower than at the idle adaptation start.
  • the adaptation also includes quantizing the values in order to mitigate a gradation of the values. Alternatively, one continuous speed increase. It will therefore asked whether the quantization is active.
  • the goal of the adaptation or learning and possibly quantization is that Reaching a target idle speed.
  • the adaptation is like this continued for a long time as there is no reset signal. On such is given if, as indicated in Figure 4b, at Engine start the oil temperature is less than a specifiable Oil temperature threshold or a limit value.
  • a start signal is awaited and additionally a further predetermined period of time, so that the Starting signal is delayed and that of the sensor measured oil temperature is present.
  • Another reset condition is the interruption of the voltage supply as well as deleting the fault memory of the engine control unit, because then the release signal is no longer problem-free can be given, for example, electrical Error signals in the brake and the control of the Camshafts can be present.
  • each with an increase in Engine idle speed occurs when a Deviation of the actual angle of an adjustable camshaft is determined from a predetermined target angle.
  • This also forms an oil pressure control adjust the idle oil pressure so that a steady one Engine running becomes possible.
  • Exceeding the deviation of the Actual angle from the target angle of the camshaft with respect to a the predetermined threshold basically occurs if a compensation with the in the control device of adjustable camshaft provided actuator no longer is possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP02023256A 2001-11-16 2002-10-17 Système pour compenser l'erreur de déphasage d'un arbre à cames à déphasage variable et méthode correspondante Expired - Fee Related EP1312773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10156510 2001-11-16
DE10156510A DE10156510A1 (de) 2001-11-16 2001-11-16 System zum Beheben der Abweichung einer verstellbaren Nockenwelle

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EP1375833A1 (fr) * 2002-06-28 2004-01-02 Robert Bosch Gmbh Procédé pour faire fonctionner un moteur à combustion interne, élément de contrôle pour mettre en oeuvre le procédé et moteur à combustion interne
WO2006011648A1 (fr) * 2004-07-28 2006-02-02 Aisin Seiki Kabushiki Kaisha Dispositif de commande de réglage de distribution variable
WO2006037720A1 (fr) * 2004-10-06 2006-04-13 Siemens Aktiengesellschaft Procede et dispositif pour commander un moteur a combustion interne
DE102005022714A1 (de) * 2005-05-18 2006-11-23 Schaeffler Kg Vorrichtung mit einem elektrischen Nockenwellenversteller, einer Steuereinheit und einem zentralen Steuergerät
EP1832720A1 (fr) * 2006-03-10 2007-09-12 Bayerische Motorenwerke Aktiengesellschaft Procédé destiné à la détermination de jeux de palier lisses d'un moteur à combustion interne
FR2906835A1 (fr) * 2006-10-06 2008-04-11 Renault Sas Procede et dispositif commandant un systeme de decalage angulaire et vehicule muni du dispositif
WO2009027178A1 (fr) * 2007-08-31 2009-03-05 Schaeffler Kg Dispositif de réglage variable des temps d'ouverture et de fermeture de soupapes d'échange des gaz d'un moteur à combustion interne
FR2995346A1 (fr) * 2012-09-12 2014-03-14 Renault Sa Procede de detection d'une defaillance d'un dispositif de decalage d'un arbre a cames

Families Citing this family (1)

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JP5611309B2 (ja) 2012-11-22 2014-10-22 三菱電機株式会社 可変バルブタイミング装置の位相制御装置および位相制御方法

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DE10002352A1 (de) * 1999-01-28 2000-08-17 Mitsubishi Electric Corp Ventilzeitablauf-Steuersystem für Verbrennungsmotor
DE10054101A1 (de) * 1999-11-01 2001-06-13 Unisia Jecs Corp Vorrichtung und Verfahren zum Diagnostizieren eines Gleitmodus-Regelsystems

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DE4340614A1 (de) * 1993-11-29 1995-06-01 Bayerische Motoren Werke Ag Vorrichtung zur Verdrehung einer Nockenwelle gegenüber der Kurbelwelle in Kraftfahrzeugen
DE4433299A1 (de) * 1994-09-19 1996-03-21 Bosch Gmbh Robert Verfahren und Vorrichtung zur Leerlaufeinstellung einer Brennkraftmaschine
US5623902A (en) * 1994-09-19 1997-04-29 Robert Bosch Gmbh Method and arrangement for idle adjustment of an internal combustion engine
DE10002352A1 (de) * 1999-01-28 2000-08-17 Mitsubishi Electric Corp Ventilzeitablauf-Steuersystem für Verbrennungsmotor
DE10054101A1 (de) * 1999-11-01 2001-06-13 Unisia Jecs Corp Vorrichtung und Verfahren zum Diagnostizieren eines Gleitmodus-Regelsystems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375833A1 (fr) * 2002-06-28 2004-01-02 Robert Bosch Gmbh Procédé pour faire fonctionner un moteur à combustion interne, élément de contrôle pour mettre en oeuvre le procédé et moteur à combustion interne
WO2006011648A1 (fr) * 2004-07-28 2006-02-02 Aisin Seiki Kabushiki Kaisha Dispositif de commande de réglage de distribution variable
US7444964B2 (en) 2004-07-28 2008-11-04 Aisin Seiki Kabushiki Kaisha Variable valve timing control device
WO2006037720A1 (fr) * 2004-10-06 2006-04-13 Siemens Aktiengesellschaft Procede et dispositif pour commander un moteur a combustion interne
US7640095B2 (en) 2004-10-06 2009-12-29 Siemens Aktiengesellschaft Method and device for controlling an internal combustion engine
DE102005022714A1 (de) * 2005-05-18 2006-11-23 Schaeffler Kg Vorrichtung mit einem elektrischen Nockenwellenversteller, einer Steuereinheit und einem zentralen Steuergerät
EP1832720A1 (fr) * 2006-03-10 2007-09-12 Bayerische Motorenwerke Aktiengesellschaft Procédé destiné à la détermination de jeux de palier lisses d'un moteur à combustion interne
FR2906835A1 (fr) * 2006-10-06 2008-04-11 Renault Sas Procede et dispositif commandant un systeme de decalage angulaire et vehicule muni du dispositif
WO2009027178A1 (fr) * 2007-08-31 2009-03-05 Schaeffler Kg Dispositif de réglage variable des temps d'ouverture et de fermeture de soupapes d'échange des gaz d'un moteur à combustion interne
FR2995346A1 (fr) * 2012-09-12 2014-03-14 Renault Sa Procede de detection d'une defaillance d'un dispositif de decalage d'un arbre a cames
WO2014041299A1 (fr) * 2012-09-12 2014-03-20 Renault S.A.S. Procede de detection d'une defaillance d'un dispositif de decalage d'un arbre a cames

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EP1312773A3 (fr) 2003-07-30
EP1312773B1 (fr) 2004-09-08
DE10156510A1 (de) 2003-06-05
DE50200949D1 (de) 2004-10-14

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