US20080125957A1 - Method of operating an internal combustion engine, in particular in a motor vehicle - Google Patents
Method of operating an internal combustion engine, in particular in a motor vehicle Download PDFInfo
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- US20080125957A1 US20080125957A1 US12/026,820 US2682008A US2008125957A1 US 20080125957 A1 US20080125957 A1 US 20080125957A1 US 2682008 A US2682008 A US 2682008A US 2008125957 A1 US2008125957 A1 US 2008125957A1
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- internal combustion
- combustion engine
- change
- relative
- shafts
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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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
Definitions
- the present invention relates to a method of operating an internal combustion engine, in particular in a motor vehicle.
- it relates to a method of operating an internal combustion engine, in accordance with which, from the signals of two detecting devices, angular positions of a crankshaft and a camshaft are determined, and in which a relative angular position of one shaft relative to another shaft is monitored.
- the invention also relates to a computer program, to an electrical storage medium for a control and/regulating device of an internal combustion engine, to a control and/regulating device for an internal combustion engine, and to an internal combustion engine.
- a relative angular position is identified as the angular position of a reference mark on one shaft relative to a reference mark on another shaft. Since the camshaft and the crankshaft are conventionally coupled with one another through a transmission device, the angular positions of the both shafts relative to one another are equal at least in predetermined operational conditions of the internal combustion engine, if the internal combustion engine operates correctly. When a difference between an actual angular position of the camshaft with respect to a nominal angular position exceeds a predetermined threshold, then an action is released. Such a difference can be for example obtained when the detecting devices are positioned erroneously or when an error occurs during the signal processing.
- one feature of the present invention resides, briefly stated in a method of the above mentioned type, in which, depending on whether a change of the detected actual relative angular position is located outside a tolerance region, an action is released.
- this objective is achieved in that it is programmed for the use in a method in accordance with the present invention.
- this objective is achieved in that a computer program for the use in the inventive method is stored in the storage medium.
- a control and/regulating device achieves this objective in that it is programmed for the use of the inventive method.
- the above mentioned objective is achieved when it includes a control and/or regulating device which is programmed for the use of the inventive method.
- the change of the coupling of one shaft to the other shaft or in other words a change in the transmission device which couples the camshaft with the crankshaft can be recognized.
- the reliability to the operation of the internal combustion engine is increased and damaged of the internal combustion engine in the case of errors can be eliminated.
- a complete malfunction of the transmission device which couples the both shafts is detectable.
- a transmission includes conventionally a control chain or a toothed belt, which is tensioned between corresponding transmission wheels.
- inventive method it is possible to recognize when during the operation of the internal combustion engine the control chain or the toothed belt slips on one of the drive wheels, when the coupling of both shafts changes. This recognition is based on the fact that a tolerance region is provided around the actual relative angular position of the both shafts determined by the detecting devices. It is measured so that when the coupling is clearly changed, for example a control chain or a toothed belt slips by at least one pitch on a corresponding transmission wheel, the relative angular position leaves the tolerance region.
- the release of the action depends on whether the change is performed within a predetermined time period and/or within a predetermined number of revolutions of one of the shafts.
- the basic consideration is that a sliding of a control chain or a toothed belt or a complete failure of the transmission device which couples the shafts with one another is performed suddenly or at least very fast. Due to this additional feature, such error can be distinguished from slowly occurring errors, for example a drift of a detection device.
- a determined relative angular position the latest at the end of an operational cycle of the internal combustion engine is stored in a non-volatile storage.
- comparison values are available, so that for example also an error during maintenance works on the transmission device, which couples the both shafts, can be recognized.
- mounting errors of one of the detecting devices must not be taken into consideration with this further feature during the determination of the tolerance region, so that the tolerance region can be relatively narrow. This increases the reliability of the inventive method.
- a further advantageous embodiment of the inventive method resides in that a desired relative angular position of the both shafts relative to one another can be changed, and for monitoring an actual relative angular position can be used, which in a specified position, for example in one of the both end positions of the possible adjusting region, is determined.
- the application region of the inventive method can be expanded also to such internal combustion engines in which a camshaft adjustment is available.
- the relative angular position of the both shafts can be influenced as desired.
- those signals for the above explained monitoring are used, which in a reproducible operational condition, namely in an exactly known position of the adjusting device, are contained in one of the end positions of the adjusting region of the camshaft adjustment.
- the determined actual relative angular position is basically connected with a certain fuzziness, since during their determination tolerances of the transmission which couples the both shafts, the detecting devices and the evaluating devices are mutually influenced. These tolerances include for example a clearance of a control chain or a toothed belt, a mounting error of one of the detecting devices, tolerances of the detecting devices, temperature influences to which the detection devices are subjected, and the like.
- the action or the actions include an inputting in an error storage and/or detected in a rest position of the internal combustion engine. Thereby the maintenance is facilitated and/or a damage to the internal combustion engine is reliably avoided.
- FIG. 1 is a view schematically showing an internal combustion engine with a detecting device for an angular position of a crankshaft and a detecting device for an angular position of a camshaft;
- FIG. 2 is a diagram showing the signals of the detecting devices of FIG. 1 as well as the corresponding operational conditions of components of the internal combustion engine of FIG. 1 in operation;
- FIG. 3 a is an enlarged section of the signal of the detecting device for the angular position of the crankshaft
- FIG. 3 b is a corresponding enlarged cross-section of the signal of the detecting device of the angular position of a camshaft in a first operational case
- FIG. 3 c is a view substantially similar to the view of FIG. 3 b for a second operational case
- FIG. 3 d is a view substantially corresponding to the view of FIG. 3 b of a third operational case.
- FIG. 4 is a flow diagram for illustration of a method of operation of the internal combustion engine of FIG. 1 .
- FIG. 1 An internal combustion engine is shown in FIG. 1 and identified as a whole with reference numeral 1 . It serves for driving a motor vehicle which is not shown in the drawing.
- the illustrated internal combustion engine is a four cylinder internal combustion engine.
- the cylinder 12 includes a combustion chamber 13 with an inlet passage 16 and an inlet valve 18 for introducing a combustion air.
- the hot combustion exhaust gasses are discharged from the combustion chamber 14 through an outlet valve 20 and an outlet passage 22 .
- Fuel is supplied into the combustion chamber 14 directly through an injection device 24 , and ignites fuel-air mixture located in the combustion chamber 12 by a spark plug 26 .
- the shown internal combustion engine is a gasoline-direct injection engine.
- the embodiments of the invention presented herein below are analogously applicable to diesel internal combustion engines as well as to internal combustion engines with a suction pipe injection.
- a piston 28 is connected through a connecting rod 30 with a crankshaft 32 .
- the crankshaft 32 is coupled with a camshaft 36 through to a transmission device 34 .
- the transmission device 34 includes several components which are not shown in the drawings, for example a toothed belt and a crankshaft-side as well as a camshaft-side belt wheel, between which the toothed belt is tensioned.
- the crankshaft 32 is connected with a pickup disc 38 which rotates angularly synchronously with the crankshaft 32 .
- the pickup disc 38 includes 58 identical angle marks 40 and one gap 42 which corresponds to the angular region between two angle marks 40 .
- the position of the pickup disc 38 is detected by a sensor 44 . Its signal is submitted through an input circuit 46 to a control and regulating device 48 .
- the pickup disc 38 and the sensor 44 are parts of a crank angle detecting device 49 .
- the camshaft 36 is connected with a pickup disc 50 which rotates angularly synchronously with a camshaft 36 .
- angle marks 52 are provided on the pickup disc 50 and separated by gaps 54 .
- the pickup disc 50 is sensed by a sensor 56 . Its signal is supplied to an input circuit 58 and finally also to the control and regulating device 48 .
- the pickup disc 50 and the sensor 56 are parts of a cam angle detecting device 59 .
- the control and regulating device 48 controls indirectly (through a not shown ignition device) the spark plugs 26 and the injection device 24 .
- FIG. 2 shows signals which are supplied from the sensors 44 and 56 to the control and regulating device 48 .
- the signal of the sensor 44 , with which the pickup disc 38 senses the crankshaft 32 is identified with reference numeral 60
- the signal supplied by the sensor 56 with which the pickup disc 50 senses the camshaft 36 is identified with reference numeral 62 .
- the rotary speed of the crankshaft 32 is determined from the time intervals in this embodiment between the falling signal flanks 63 of the signal 60 . A further evaluation is possible for determination of the gaps 42 , whose position is represented for a selected position of the crankshaft 32 .
- the signal 62 must be evaluated. Since the pickup disc 50 per operating clearance rotates only once, while to the contrary the pickup disc 38 per operating clearance rotates twice, with a corresponding synchronization of the signal 62 with the signal 60 , the position of the crankshaft 32 can be clearly defined at the corresponding positions of the piston 28 and the operating condition of the cylinder 12 can be correctly detected. For this purpose in the inventive example also the falling flanks 65 of the signal 52 are evaluated. Depending on this, for the single cylinder the injections of fuel by the injection devices 24 (reference numeral 64 in FIG. 2 ) and in the ignition of the fuel-air mixture by the spark plug 26 (reference numeral 66 in FIG. 2 ) are performed. The opening time period of the inlet valve 18 in FIG. 2 is identified with reference numeral 68 .
- a predetermined falling flank 65 ref is located between two short rectangular signals 72 of the signal 62 , which represents the angular position of the camshaft 36 , in this embodiment with a crank angle KW Ref . This situation is shown in form of an increased section in FIGS. 3 a and 3 b.
- a desired angular position between the crankshaft 32 and the camshaft 36 is defined by this crank angle KW Ref , or in other words a predetermined angular position of the camshaft 36 in case of a predetermined angular position of the crankshaft 32 . Because of the manufacturing tolerances, of mounting errors, or because of a malfunction in operation of the internal combustion engine 10 , it is possible that this angular position does not correspond to the desired value. In order to determine this, a method is proposed which is stored as a computer program in a storage 76 of the control and regulating device 48 . This method is illustrated in FIG. 4 . After a start block 78 , a block 80 is inquired, whether the switching conditions of the internal combustion engine 10 are provided.
- a difference DIF 1 is determined between a relative angular position KW art — t1 and a nominal angular position KW REF .
- the angular position KW act — t1 is detected during the last operational cycle of the internal combustion 10 and stored in a non-volatile storage. Such an operational situation with DIF 1 not equal to zero is shown in FIG. 3 c .
- the difference DIF 1 corresponds finally to the static deviation of the actual relative angular position of the camshaft 36 to the crankshaft 32 from the nominal angular position KW REF .
- the difference DIF 1 is made at least approximately to zero by a corresponding adaptation of the angular position KWa act — t1 to the nominal angular position KW REF .
- the value KW act — t1 as explained hereinabove is stored in a non-volatile storage.
- the adaptation is performed with a time delay by means of a low pass filter, in order to prevent that the actual relative angular position KWa act — t2 is also adapted to the nominal angular position KW REF which would make impossible the correct determination of the DIF 2 .
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Abstract
A method of operating an internal combustion engine in a motor vehicle has the steps of determining angular positions of a crankshaft and a camshaft from signals of two detecting devices, monitoring a relative angular position of one of the shafts relative to the other of the shafts, and, depending on whether a change of the determined actual relative position is located outside the tolerance region, releasing an action, and also a computer program, a storage medium, a control and/or regulating unit, and an internal combustion engine with the use of inventive method are proposed.
Description
- The present invention relates to a method of operating an internal combustion engine, in particular in a motor vehicle.
- More particularly, it relates to a method of operating an internal combustion engine, in accordance with which, from the signals of two detecting devices, angular positions of a crankshaft and a camshaft are determined, and in which a relative angular position of one shaft relative to another shaft is monitored.
- The invention also relates to a computer program, to an electrical storage medium for a control and/regulating device of an internal combustion engine, to a control and/regulating device for an internal combustion engine, and to an internal combustion engine.
- A method of the above mentioned general type is disclosed for example in the German patent document DE 100 32 332 A1. In this document it is described that for monitoring and diagnosis an association of the angular position of the camshaft of an internal combustion engine to a crankshaft must be tested, whether the signals of a detecting device for detecting the camshaft angle and a detecting device for detecting the crankshaft angle are plausible relative to one another.
- Here and later a relative angular position is identified as the angular position of a reference mark on one shaft relative to a reference mark on another shaft. Since the camshaft and the crankshaft are conventionally coupled with one another through a transmission device, the angular positions of the both shafts relative to one another are equal at least in predetermined operational conditions of the internal combustion engine, if the internal combustion engine operates correctly. When a difference between an actual angular position of the camshaft with respect to a nominal angular position exceeds a predetermined threshold, then an action is released. Such a difference can be for example obtained when the detecting devices are positioned erroneously or when an error occurs during the signal processing.
- Accordingly, it is an object of the present invention to provide a method of the above mentioned general type, which avoids the disadvantages of the prior art.
- More particularly, it is an object of the present invention to provide a method of the above mentioned general type, which is performed so that the internal combustion engine can operate reliably.
- In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated in a method of the above mentioned type, in which, depending on whether a change of the detected actual relative angular position is located outside a tolerance region, an action is released.
- In a computer program, this objective is achieved in that it is programmed for the use in a method in accordance with the present invention. In an electrical storage medium this objective is achieved in that a computer program for the use in the inventive method is stored in the storage medium. A control and/regulating device achieves this objective in that it is programmed for the use of the inventive method. In the internal combustion engine, the above mentioned objective is achieved when it includes a control and/or regulating device which is programmed for the use of the inventive method.
- When the method is performed in accordance with the present invention, the change of the coupling of one shaft to the other shaft, or in other words a change in the transmission device which couples the camshaft with the crankshaft can be recognized. Thereby the reliability to the operation of the internal combustion engine is increased and damaged of the internal combustion engine in the case of errors can be eliminated. With the inventive method a complete malfunction of the transmission device which couples the both shafts is detectable.
- The basis for this is that conventionally the camshaft and the crankshaft of an internal combustion engine are coupled with one another through a mechanical transmission. Such a transmission includes conventionally a control chain or a toothed belt, which is tensioned between corresponding transmission wheels. In the inventive method it is possible to recognize when during the operation of the internal combustion engine the control chain or the toothed belt slips on one of the drive wheels, when the coupling of both shafts changes. This recognition is based on the fact that a tolerance region is provided around the actual relative angular position of the both shafts determined by the detecting devices. It is measured so that when the coupling is clearly changed, for example a control chain or a toothed belt slips by at least one pitch on a corresponding transmission wheel, the relative angular position leaves the tolerance region.
- In accordance with another embodiment of the present invention, it is proposed that the release of the action depends on whether the change is performed within a predetermined time period and/or within a predetermined number of revolutions of one of the shafts. The basic consideration is that a sliding of a control chain or a toothed belt or a complete failure of the transmission device which couples the shafts with one another is performed suddenly or at least very fast. Due to this additional feature, such error can be distinguished from slowly occurring errors, for example a drift of a detection device.
- It is also proposed that a determined relative angular position the latest at the end of an operational cycle of the internal combustion engine is stored in a non-volatile storage. During a subsequent operational circle of the internal combustion engine, comparison values are available, so that for example also an error during maintenance works on the transmission device, which couples the both shafts, can be recognized. Also, mounting errors of one of the detecting devices must not be taken into consideration with this further feature during the determination of the tolerance region, so that the tolerance region can be relatively narrow. This increases the reliability of the inventive method.
- A further advantageous embodiment of the inventive method resides in that a desired relative angular position of the both shafts relative to one another can be changed, and for monitoring an actual relative angular position can be used, which in a specified position, for example in one of the both end positions of the possible adjusting region, is determined. Thereby the application region of the inventive method can be expanded also to such internal combustion engines in which a camshaft adjustment is available.
- With such a camshaft adjustment, the relative angular position of the both shafts can be influenced as desired. For determining a relatively narrow tolerance region, only those signals for the above explained monitoring are used, which in a reproducible operational condition, namely in an exactly known position of the adjusting device, are contained in one of the end positions of the adjusting region of the camshaft adjustment.
- It is especially advantageous when the determined actual relative angular position is adapted with respect to a nominal value, wherein the adaptation is performed in a time-delayed fashion, for example by means of a low pass filter. The determined actual relative angular position is basically connected with a certain fuzziness, since during their determination tolerances of the transmission which couples the both shafts, the detecting devices and the evaluating devices are mutually influenced. These tolerances include for example a clearance of a control chain or a toothed belt, a mounting error of one of the detecting devices, tolerances of the detecting devices, temperature influences to which the detection devices are subjected, and the like. At least a part of these tolerance influences, namely the static influences are separated in accordance with a further embodiment of the method, by adapting the detected actual relative angular position generally to the nominal value. With this adaptation however there is a danger that the change of the relative angular position no more can be detected correctly. For this reason the adaptation is performed in a time-delayed fashion.
- It is first of all proposed that, depending on whether the detected actual angular position is located outside of a tolerance region, an action is released. In this way also a static error of the angular position of the both shafts can be recognized.
- It is further advantages when the action or the actions include an inputting in an error storage and/or detected in a rest position of the internal combustion engine. Thereby the maintenance is facilitated and/or a damage to the internal combustion engine is reliably avoided.
- The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
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FIG. 1 is a view schematically showing an internal combustion engine with a detecting device for an angular position of a crankshaft and a detecting device for an angular position of a camshaft; -
FIG. 2 is a diagram showing the signals of the detecting devices ofFIG. 1 as well as the corresponding operational conditions of components of the internal combustion engine ofFIG. 1 in operation; -
FIG. 3 a is an enlarged section of the signal of the detecting device for the angular position of the crankshaft; -
FIG. 3 b is a corresponding enlarged cross-section of the signal of the detecting device of the angular position of a camshaft in a first operational case; -
FIG. 3 c is a view substantially similar to the view ofFIG. 3 b for a second operational case; -
FIG. 3 d is a view substantially corresponding to the view ofFIG. 3 b of a third operational case; and -
FIG. 4 is a flow diagram for illustration of a method of operation of the internal combustion engine ofFIG. 1 . - An internal combustion engine is shown in
FIG. 1 and identified as a whole withreference numeral 1. It serves for driving a motor vehicle which is not shown in the drawing. - The illustrated internal combustion engine is a four cylinder internal combustion engine. In
FIG. 1 only the components of one cylinder are shown, which cylinder is identified withreference numeral 12. Thecylinder 12 includes a combustion chamber 13 with aninlet passage 16 and aninlet valve 18 for introducing a combustion air. The hot combustion exhaust gasses are discharged from thecombustion chamber 14 through anoutlet valve 20 and anoutlet passage 22. Fuel is supplied into thecombustion chamber 14 directly through aninjection device 24, and ignites fuel-air mixture located in thecombustion chamber 12 by aspark plug 26. The shown internal combustion engine is a gasoline-direct injection engine. The embodiments of the invention presented herein below are analogously applicable to diesel internal combustion engines as well as to internal combustion engines with a suction pipe injection. - A
piston 28 is connected through a connectingrod 30 with acrankshaft 32. Thecrankshaft 32 is coupled with acamshaft 36 through to atransmission device 34. Thetransmission device 34 includes several components which are not shown in the drawings, for example a toothed belt and a crankshaft-side as well as a camshaft-side belt wheel, between which the toothed belt is tensioned. - The
crankshaft 32 is connected with apickup disc 38 which rotates angularly synchronously with thecrankshaft 32. Thepickup disc 38 includes 58 identical angle marks 40 and onegap 42 which corresponds to the angular region between two angle marks 40. The position of thepickup disc 38 is detected by asensor 44. Its signal is submitted through aninput circuit 46 to a control and regulatingdevice 48. Thepickup disc 38 and thesensor 44 are parts of a crankangle detecting device 49. - Similarly the
camshaft 36 is connected with apickup disc 50 which rotates angularly synchronously with acamshaft 36. Also angle marks 52 are provided on thepickup disc 50 and separated bygaps 54. Thepickup disc 50 is sensed by asensor 56. Its signal is supplied to aninput circuit 58 and finally also to the control and regulatingdevice 48. Thepickup disc 50 and thesensor 56 are parts of a camangle detecting device 59. The control and regulatingdevice 48 controls indirectly (through a not shown ignition device) the spark plugs 26 and theinjection device 24. -
FIG. 2 shows signals which are supplied from thesensors device 48. The signal of thesensor 44, with which thepickup disc 38 senses thecrankshaft 32 is identified withreference numeral 60, while the signal supplied by thesensor 56 with which thepickup disc 50 senses thecamshaft 36 is identified withreference numeral 62. The rotary speed of thecrankshaft 32 is determined from the time intervals in this embodiment between the falling signal flanks 63 of thesignal 60. A further evaluation is possible for determination of thegaps 42, whose position is represented for a selected position of thecrankshaft 32. - For obtaining however a sufficient information about the actual operating clearance of the internal combustion engine, additionally the
signal 62 must be evaluated. Since thepickup disc 50 per operating clearance rotates only once, while to the contrary thepickup disc 38 per operating clearance rotates twice, with a corresponding synchronization of thesignal 62 with thesignal 60, the position of thecrankshaft 32 can be clearly defined at the corresponding positions of thepiston 28 and the operating condition of thecylinder 12 can be correctly detected. For this purpose in the inventive example also the fallingflanks 65 of thesignal 52 are evaluated. Depending on this, for the single cylinder the injections of fuel by the injection devices 24 (reference numeral 64 inFIG. 2 ) and in the ignition of the fuel-air mixture by the spark plug 26 (reference numeral 66 inFIG. 2 ) are performed. The opening time period of theinlet valve 18 inFIG. 2 is identified withreference numeral 68. - When all tolerance influences are equal to zero and the coupling between the
crankshaft 32 and thecamshaft 36 is error-free, a predetermined fallingflank 65 ref is located between two shortrectangular signals 72 of thesignal 62, which represents the angular position of thecamshaft 36, in this embodiment with a crank angle KWRef. This situation is shown in form of an increased section inFIGS. 3 a and 3 b. - A desired angular position between the
crankshaft 32 and thecamshaft 36 is defined by this crank angle KWRef, or in other words a predetermined angular position of thecamshaft 36 in case of a predetermined angular position of thecrankshaft 32. Because of the manufacturing tolerances, of mounting errors, or because of a malfunction in operation of theinternal combustion engine 10, it is possible that this angular position does not correspond to the desired value. In order to determine this, a method is proposed which is stored as a computer program in astorage 76 of the control and regulatingdevice 48. This method is illustrated inFIG. 4 . After astart block 78, ablock 80 is inquired, whether the switching conditions of theinternal combustion engine 10 are provided. Thereby it is guaranteed that the method described inFIG. 4 is efficiently guided to an end when the machine is started and thereby is located in a defined initial condition. This is specifically important in internal combustion engines with an adjustable angular position of thecamshaft 36 relative to thecrankshaft 32, to provide defined and reproducible conditions for performance of the method. For this purpose in theblock 18 it is inquired whether a bit START_COND=1. - If the answer in the
block 80 is “yes” then in the block 82 a difference DIF1 is determined between a relative angular position KWart— t1 and a nominal angular position KWREF. The angular position KWact— t1 is detected during the last operational cycle of theinternal combustion 10 and stored in a non-volatile storage. Such an operational situation with DIF1 not equal to zero is shown inFIG. 3 c. The difference DIF1 corresponds finally to the static deviation of the actual relative angular position of thecamshaft 36 to thecrankshaft 32 from the nominal angular position KWREF. When the amount of the difference DIF1 exceeds a limiting value G1 (block 84), then in ablock 86 anerror bit ERROR 1=1 is set. Otherwise, this error bit is deleted in ablock 88. If theerror bit ERROR 1 is set in theblock 86, in the block 90 a return to thestart block 78 is performed. - If to the contrary in the
block 88 theerror bit ERROR 1 is deleted, then in the block 92 adifference DIF 2 between the angular position KWact-t1 and the actual relative angular position KWact-t2 is formed (an operational situation with DIF2 not equal zero is shown inFIG. 3 d). The both angular positions KWact— t1 and KWact— t2 are detected at different time points t1 and t2, so that the difference DIF2 represents a time (“dynamic”) change of the angular position. In ablock 24 it is checked whether the amount of the difference DIF2 exceeds a limiting value G2. If the answer in theblock 94 is “YES”, then in theblock 96 anerror bit ERROR 2=1 is set. Otherwise, thiserror bit ERROR 2 inblock 98 is set equal 0. - With the set error bit ERROR 1 a static error takes place in the coupling between the
crankshaft 32 and thecamshaft 36. When theerror bit ERROR 2 is set, to the contrary a dynamic error function is generated. For example a sliding of the toothed belt or a tearing off of the toothed belt belongs to the situation. In order to determine moreover whether this dynamic error function is sudden or gradual, it can be detected whether the change of the DIF2 of the angular position occurs within a predetermined time window. A corresponding inquiry is performed between theblocks FIG. 4 . - It should be also pointed out that at least when the difference DIF1 does not exceed the limiting value G1, the difference DIF1 is made at least approximately to zero by a corresponding adaptation of the angular position KWaact
— t1 to the nominal angular position KWREF. In order to correctly determine the difference DIF2 the value KWact— t1 as explained hereinabove is stored in a non-volatile storage. Furthermore, the adaptation is performed with a time delay by means of a low pass filter, in order to prevent that the actual relative angular position KWaact— t2 is also adapted to the nominal angular position KWREF which would make impossible the correct determination of the DIF2. - It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
- While the invention has been illustrated and described as embodied in method of operating an internal combustion engine, in particular in a vehicle, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
- Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.
Claims (7)
1-13. (canceled)
14. A method of operating an internal combustion engine in a motor vehicle, comprising the steps:
determining angular positions of a crankshaft and a camshaft from signals of two detecting devices;
determining at different time points relative angular positions of one of the shafts relative to the other of the shafts;
determining whether a change of the determined relative positions is located outside a tolerance region; and
releasing an action that provides a corresponding operation of an internal combustion engine in a motor vehicle when said change is located outside the tolerance region,
depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both.
15. An electrical storage medium for a control and/or regulating device of an internal combustion engine, formed so as to store a computer program which is programmed for performing a method of operating an internal combustion engine in a motor vehicle, which comprises the steps of determining angular positions of a crankshaft and a camshaft from signals of two detecting devices; monitoring a relative angular position of one of the shafts relative to the other of the shafts; and, depending on whether a change of the determined actual relative position is located outside the tolerance region, releasing an action depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both.
16. A control and/or regulating unit for an internal combustion engine, programmed for use in a method of operating an internal combustion engine in a motor vehicle, which comprises the steps of determining angular positions of a crankshaft and a camshaft from signals of two detecting devices; monitoring a relative angular position of one of the shafts relative to the other of the shafts; and, depending on whether a change of the determined actual relative position is located outside the tolerance region, releasing an action depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both.
17. An internal combustion engine for a motor vehicle, comprising a control and/or regulating unit for an internal combustion engine, programmed for use in a method of operating an internal combustion engine in a motor vehicle, which comprises the steps of determining angular positions of a crankshaft and a camshaft from signals of two detecting devices; monitoring a relative angular position of one of the shafts relative to the other of the shafts; and, depending on whether a change of the determined actual relative position is located outside the tolerance region, releasing an action depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both.
18. A method of operating an internal combustion engine in a motor vehicle, comprising the steps:
determining angular positions of a crankshaft and a camshaft from signals of two detecting devices;
determining at different time points a relative angular positions of one of the shafts relative to the other of the shafts;
determining whether a change of the determined relative positions is located outside a tolerance region; and
releasing an action when said change is located outside the tolerance region depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both, wherein releasing the action includes a stoppage of the internal combustion engine.
19. A method of recognizing the change of the coupling of a crankshaft and a camshaft of an internal combustion engine in a motor vehicle, comprising the following steps:
determining angular positions of said crankshaft and said camshaft from signals of two detecting devices;
monitoring a relative angular position of one of the shafts relative to the other of the shafts;
providing a tolerance region of the relative position;
determining whether a change of the determined actual relative position is located outside the tolerance region;
recognizing the change of the coupling of said crankshaft and said camshaft and, without compensating the changes, releasing an action depending on whether a change of the determined actual relative position is located outside said tolerance region; and
performing the release of the action depending on whether the change is located within a predetermined parameter selected from the group consisting of a predetermined time interval, a predetermined number of revolutions, and both.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/026,820 US20080125957A1 (en) | 2003-05-23 | 2008-02-06 | Method of operating an internal combustion engine, in particular in a motor vehicle |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEDE10323486.1 | 2003-05-23 | ||
DE10323486A DE10323486B4 (en) | 2003-05-23 | 2003-05-23 | Method for operating an internal combustion engine, in particular in a motor vehicle |
US10/847,937 US7370517B2 (en) | 2003-05-23 | 2004-05-18 | Method of operating an internal combustion engine by determining angular positions of a crankshaft and camshaft |
US12/026,820 US20080125957A1 (en) | 2003-05-23 | 2008-02-06 | Method of operating an internal combustion engine, in particular in a motor vehicle |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/847,937 Division US7370517B2 (en) | 2003-05-23 | 2004-05-18 | Method of operating an internal combustion engine by determining angular positions of a crankshaft and camshaft |
Publications (1)
Publication Number | Publication Date |
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US20080125957A1 true US20080125957A1 (en) | 2008-05-29 |
Family
ID=33394782
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/847,937 Expired - Fee Related US7370517B2 (en) | 2003-05-23 | 2004-05-18 | Method of operating an internal combustion engine by determining angular positions of a crankshaft and camshaft |
US12/026,820 Abandoned US20080125957A1 (en) | 2003-05-23 | 2008-02-06 | Method of operating an internal combustion engine, in particular in a motor vehicle |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/847,937 Expired - Fee Related US7370517B2 (en) | 2003-05-23 | 2004-05-18 | Method of operating an internal combustion engine by determining angular positions of a crankshaft and camshaft |
Country Status (3)
Country | Link |
---|---|
US (2) | US7370517B2 (en) |
DE (1) | DE10323486B4 (en) |
FR (1) | FR2855217B1 (en) |
Cited By (1)
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US9108641B2 (en) | 2013-01-16 | 2015-08-18 | Honda Motor Co., Ltd. | Control apparatus for vehicles |
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FR2890690B1 (en) * | 2005-09-09 | 2007-11-09 | Siemens Vdo Automotive Sas | METHOD FOR DETERMINING INVERSION OF DIRECTION OF ROTATION OF MOTOR |
JP2007196927A (en) * | 2006-01-27 | 2007-08-09 | Showa Corp | Electric steering device |
US7366603B2 (en) * | 2006-07-26 | 2008-04-29 | Delphi Technologies, Inc. | Method of decoding a CAM signal for an internal combustion engine |
DE102008041037A1 (en) * | 2008-08-06 | 2010-02-11 | Robert Bosch Gmbh | Method and device of a control for a start-stop operation of an internal combustion engine |
FR2951781B1 (en) * | 2009-10-28 | 2011-11-04 | Peugeot Citroen Automobiles Sa | METHOD FOR DETERMINING THE SETTING OF A CAMSHAFT OF A COMBUSTION ENGINE |
US9341088B2 (en) | 2011-03-29 | 2016-05-17 | GM Global Technology Operations LLC | Camshaft phaser control systems and methods |
JP6394447B2 (en) | 2015-03-16 | 2018-09-26 | 株式会社デンソー | Crank angle detector |
FR3087838B1 (en) * | 2018-10-24 | 2020-12-25 | Continental Automotive France | COMBUSTION ENGINE SYNCHRONIZATION PROCESS |
CN114962024B (en) * | 2022-07-04 | 2023-03-24 | 潍柴动力股份有限公司 | Method and device for determining rotation angle of engine and engine |
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Also Published As
Publication number | Publication date |
---|---|
US20040236497A1 (en) | 2004-11-25 |
US7370517B2 (en) | 2008-05-13 |
FR2855217B1 (en) | 2007-08-03 |
DE10323486A1 (en) | 2004-12-09 |
FR2855217A1 (en) | 2004-11-26 |
DE10323486B4 (en) | 2012-10-25 |
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