DE19928664B4 - Method for determining the torque of an internal combustion engine - Google Patents

Abstract

Method for determining the torque (M) applied by an internal combustion engine by evaluating the rotational speed (n) of the crankshaft of the internal combustion engine with a transmitter wheel provided with markings on the periphery, which rotates with the crankshaft relative to a pickup, the pickup measuring the time intervals (tz ) receives between the marks of the encoder wheel, wherein
- a block size (B) is defined, and
- One of the block size (B) corresponding number of time intervals (tz) between the marks of the encoder wheel of the recorded during the previous rotation of the crankshaft time intervals (tz) is combined into blocks,
characterized in that
- For a recorded during a rotation of the crankshaft time interval (tz) from the recorded during a previous rotation of the crankshaft intervals (tz) a characteristic point is determined, wherein
- In the blocks, the block sum (z_i) of the recorded during the previous rotation of the crankshaft time intervals (tz) is formed, and
- out...

Description

State of technology

• – eine Blockgröße definiert, und
• – jeweils eine der Blockgröße entsprechende Anzahl von zeitlichen Abständen zwischen den Markierungen des Geberrads der während der vorangegangenen Drehung der Kurbelwelle aufgenommenen zeitlichen Abstände zu Blöcken zusammengefasst.

The present invention relates to a method for determining the torque applied by an internal combustion engine by evaluating the rotational speed of the crankshaft of the internal combustion engine with a circumferentially marked encoder wheel, which rotates with the crankshaft relative to a transducer, wherein the transducer, the time intervals between the markings receives the encoder wheel. It will:

• - defines a block size, and
• - Each one of the block size corresponding number of time intervals between the marks of the encoder wheel of the recorded during the previous rotation of the crankshaft time intervals combined into blocks.

to Detecting the position of a shaft, for example. The crankshaft or the Camshaft of an internal combustion engine, it is known on the shaft a Encoder disk or a sensor wheel to provide with markings, the be scanned by a fixed pickup. The donor wheel is, for example, as a donor gear with teeth as marks on the Scope of the encoder wheel formed. The transducer is, for example, as a inductive pickup formed in the case of rotation of the crankshaft and the encoder gear from the passing teeth voltage pulses be induced.

It become the time intervals the voltage pulses or the teeth of the encoder gear, the so-called Zahnzeiten, measured.

Then the measured teeth times are evaluated and the course of the Moments of the internal combustion engine acting on the crankshaft are determined.

From the DE 195 40 675 C1 a method of the type mentioned is known. In the method disclosed therein, the torque output by the internal combustion engine is determined from speed fluctuations. To detect speed fluctuations, the tooth times between markings of the sensor wheel are measured and evaluated. The determined moment is then used for the detection of combustion misfires. Combustion misfires of one or more cylinders lead to a temporary slowing down of the angular velocity of the crankshaft. In the detection of combustion misfires, a mean value of the determined torque is formed by low-pass filtering, and the deviations of the actual torque relative to this mean value are detected. It is therefore a relative representation of the torque applied by the internal combustion engine.

There especially at higher levels Speeds the deviations of the actual moment due to misfiring is very low relative to the mean of the moment, the time intervals be measured very accurately between the marks of the encoder wheel. Disturbances in the Recording the time intervals, especially tolerances and component problems during production or when mounting the sender wheel on the crankshaft, lead to Inaccuracies in the measurement of time intervals and thus incorrectly determined moments. As particularly error-prone disturbing influences the recording of the time intervals between the markings of the sender wheel, the tolerances of the marks on the Crankshaft mounted donor wheel proven. These tolerances of Markings relate, for example, the dimensions of the markings, the Distances of Markings to each other and formed as teeth markings the inclination of the tooth flanks.

From the DE 195 34 996 A1 A similar method is proposed, in which the tooth times, in particular by forming differences of adjacent tooth times and by normalizing these differences, in the dimension of an acceleration to convict. The differences are normalized to the third power of the tooth time to an ignition cycle with index i.

In the DE 44 45 684 A1 Also, a similar method is described in which normalization is mentioned as one of several processing steps.

outgoing From this prior art it is therefore the object of the present Invention, a method of the type mentioned above to design and refine that impact of the disturbing influences the detection of the time intervals between the marks, in particular the effects of tolerances of the markings on the measured, largely eliminated by the internal combustion engine applied torque become.

• – für einen während einer Drehung der Kurbelwelle aufgenommenen zeitlichen Abstand aus den während einer vorangegangenen Drehung der Kurbelwelle aufgenommenen zeitlichen Abständen ein Kennlinienpunkt ermittelt wird, wobei
• – in den Blöcken die Blocksumme der während der vorangegangenen Drehung der Kurbelwelle aufgenommenen zeitlichen Abstände gebildet wird, und
• – aus den Blocksummen der Kennlinienpunkt gemäss der Gleichung SUM_i (z_2i-1)/SUM_i (z_2i) oder SUM_i (z_2i)/SUM_i (z_2i-1)ermittelt wird, wobei i eine positive natürliche Zahl ist, und
• – durch Auswerten der Extrema einer durch die ermittelten Kennlinienpunkte verlaufende Kennlinie das von der Brennkraftmaschine aufgebrachte Moment bestimmt wird.

To solve this problem, the invention proposes starting from the method of the type mentioned that

• For a time interval recorded during a rotation of the crankshaft from the during a previous rotation of the Crankshaft recorded time intervals a characteristic point is determined, wherein
• - In the blocks, the block sum of the recorded during the previous rotation of the crankshaft intervals is formed, and
• - From the block sums of the characteristic point according to the equation SUM_i (z_2i-1) / SUM_i (z_2i) or SUM_i (z_2i) / SUM_i (z_2i-1) is determined, where i is a positive natural number, and
• - By evaluating the extrema of a running through the determined characteristic curve curve, the torque applied by the internal combustion engine is determined.

at the method according to the invention is from the time intervals a previous rotation of the crankshaft determines a characteristic. to Determining the characteristic, however, the time intervals not directly used. Rather, each first several of the time intervals summarized a previous rotation to a block of a certain block size. The time intervals within a block are used to eliminate the effects of Averaged disturbances. To average the time intervals, the quotient of the Sum of the time intervals in a block and the number of time intervals in the Block, so the block size, formed become. In this case, the quotient is called the block time. Since the block sizes of the Quotient at the later Shorten the determination of the characteristic, can in the individual blocks instead of the mean, only the sum of the time intervals in the blocks be formed. In this case, the sum is called the block time designated.

One Characteristic point is in each case from the block times of a previous one Rotation of the crankshaft determined. The rotation of the crankshaft can a full turn, a part of a turn, or a multiple a turn of the crankshaft. If more characteristic points the characteristic curve are calculated, also for these characteristic points the time intervals grouped into blocks, the block times are determined and from the block times then the characteristic point calculated. Thus one characteristic point is determined after the other.

Finally will by evaluating the extremes of the characteristic applied by the internal combustion engine Moment determined. This can be determined from the determined characteristic curve an engine map that applied by the internal combustion engine Moment to be determined. The engine map is preferably on an engine test bench determined empirically. The engine map depends on the type of characteristic and hence the nature of the equation, from which the individual characteristic points and other factors (eg crankshaft speed) from.

A characteristic point becomes according to the equation SUM_i (z_2i-1) / SUM_i (z_2i) or SUM_i (z_2i) / SUM_i (z_2i-1) determined. In this case, z_i denotes the individual block times of a previous rotation of the crankshaft, i is a running variable which can assume any values of positive natural numbers.

The Characteristic curve, which is determined by means of the one equation, is the Inverse of the characteristic determined by the other equation. Both Characteristics provide a reliable Measure of that of the internal combustion engine applied torque. By moving one characteristic around the block size relative to the other characteristic, can they Both characteristics are brought into phase. So it's just a question of the evaluation of the characteristics, as from them the of the internal combustion engine applied torque is determined.

With the method according to the invention can be done in a particularly simple way by evaluating the temporal distances the marks of the sender wheel on the crankshaft that of the internal combustion engine applied moment can be determined. This will be the impact from disturbances at the Recording the time intervals between the marks, especially the effects of tolerances the markings applied to the engine measured moment almost completely eliminated.

in the Contrary to the known from the prior art method for Determining the torque applied by the internal combustion engine is the determined moment in the method according to the invention is not relative to an average, but absolutely represented. The with the inventive method determined torque is largely independent of the operating mode of the internal combustion engine (eg of ignition timing, Fuel-air mixture, turbo operation, optimized end throttle, misfires) and independent environmental conditions (eg air pressure and temperature of the Ambient air).

The donor wheel is, for example, as a donor tooth formed with teeth as marks on the circumference of the encoder wheel. The transducer is designed, for example, as an inductive pickup, in which voltage pulses are induced by the teeth passing past during a rotation of the crankshaft and the encoder gearwheel. The time intervals between the voltage pulses or the teeth of the encoder gear, the so-called tooth times, are measured. Then the measured tooth times are evaluated in accordance with the above statements and the torque applied by the internal combustion engine is determined.

• – für einen während einer Drehung der Kurbelwelle aufgenommenen zeitlichen Abstand aus den während einer vorangegangenen Drehung der Kurbelwelle aufgenommenen zeitlichen Abständen ein Kennlinienpunkt ermittelt wird, wobei
• – in den Blöcken die Blocksumme der während der vorangegangenen Drehung der Kurbelwelle aufgenommenen zeitlichen Abstände gebildet wird, und
• – aus den Blocksummen der Kennlinienpunkt gemäss der Gleichung SUM_i (z_2i-1) – SUM_i (z_2i) oder SUM_i (z_2i) – SUM_i (z_2i-1)ermittelt wird, wobei i eine positive natürliche Zahl ist, und
• – durch Auswerten der Extrema einer durch die ermittelten Kennlinienpunkte verlaufende Kennlinie das von der Brennkraftmaschine aufgebrachte Moment bestimmt wird.

As a further solution of the present invention is proposed starting from the method of the type mentioned that

• - For a recorded during a rotation of the crankshaft time interval from the recorded during a previous rotation of the crankshaft, a characteristic curve point is determined, wherein
• - In the blocks, the block sum of the recorded during the previous rotation of the crankshaft intervals is formed, and
• - From the block sums of the characteristic point according to the equation SUM_i (z_2i-1) - SUM_i (z_2i) or SUM_i (z_2i) - SUM_i (z_2i-1) is determined, where i is a positive natural number, and
• - By evaluating the extrema of a running through the determined characteristic curve curve, the torque applied by the internal combustion engine is determined.

This different second method of the invention differ from the previous method in that the individual Characteristic points can be calculated according to another equation. As well as the characteristic according to the first method according to the invention However, this characteristic also provides a reliable measure of that of the internal combustion engine applied moment.

One Block must not include too many time intervals, i. H. the block size is allowed not too big otherwise there would be an actual change from the internal combustion engine Moment from the averaged block times are no longer detected could. The effects of the changing Moments would sorted out, so to speak. Therefore, the block size (B) becomes according to preferred embodiment of the present invention from the quotient of the total number (Z) the marks of the sender wheel and the total number of cylinders (Zyl) the internal combustion engine defined (B = Z / Zyl).

to Averaging the measured time intervals between the marks is according to an advantageous embodiment of the invention each one of Block size corresponding Number of time intervals between the marks of the sender wheel during at least one previous one Rotation of the crankshaft recorded time intervals combined into blocks. So it will be over one or more previous full revolutions of the crankshaft recorded time intervals summarized in blocks.

Preferably each one of the block size corresponding Number of time intervals between the marks of the sender wheel during the immediately preceding Rotation of the crankshaft recorded time intervals combined into blocks. In the o. G. Equations for the calculation of the characteristic points from the Blocksums runs i thus from one to the quotient of the total number (Z) of the marks of the sender wheel and the double block size (B) (i = Z / 2 * B).

For example, if the encoder wheel has 60 marks and the block size equals five, then the run variable i goes from one to six (i = 60 / (2x5) = 6). For example, the time intervals of the immediately preceding full revolution of the crankshaft are considered. One full revolution for the present example includes twelve blocks, each containing five measured time intervals. For each block, the block time z_i is formed from the sum of the five time intervals of the block. From the block times z_i the characteristic point is then determined from one of the equation: (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) / (z_2 + z_4 + z_6 + z_8 + z_10 + + z_12) . (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) / (z_1 + z_3 + z_5 + z_7 + z_9 + + z_11) . (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) - (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) or (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) - (z_1 + z_3 + z_5 + z_7 + z_9 + + z_11) ,

In order to save computing power is proposed according to a preferred embodiment of the present invention, that only for during the rotation of the crankshaft taken time intervals a characteristic point is determined at which the characteristic has an extremum. Since the characteristic curve for given internal combustion engines and for given transmitter wheels always has the same period duration, it can be accurately predicted when the characteristic curve has extremes. Only the amplitude of the characteristic curve changes as a function of the torque applied by the internal combustion engine.

To the Determining the torque applied by the internal combustion engine, the Extrema of the determined characteristic evaluated in different ways become. According to An advantageous development of the invention is proposed that the maximum of the characteristic during a period of the characteristic as a measure of that of the internal combustion engine applied moment is used. From the measure of the applied Moment can then on the basis of an engine map that of the internal combustion engine applied moment can be determined. The engine map is preferably on an engine test bench determined empirically.

According to one Another advantageous development of the invention is proposed that the difference between the maximum and the minimum of the characteristic while a period of the characteristic curve as a measure of the applied by the internal combustion engine Moment is used.

Finally will proposed according to the invention, that the ratio of the maximum to the minimum of the characteristic during a period of the characteristic as a measure of that the internal combustion engine applied torque is used.

One preferred embodiment The present invention will be described below with reference to the drawings explained in more detail. It demonstrate:

1 the course of time intervals in an internal combustion engine and the course of a characteristic curve determined therefrom; and

2 a flow diagram of the method according to the invention.

to Detecting the position of a crankshaft of an internal combustion engine It is known, on the crankshaft, a sender wheel with markings rotatably secured, by means of a fixed pickup is scanned. The time intervals between determined the markings. The sender wheel is in the present Example as a donor gear with teeth as marks on the circumference formed of the encoder wheel. The transducer is considered an inductive one Transducer formed in the case of rotation of the crankshaft and the encoder gear from the passing teeth voltage pulses be induced.

It become the time intervals the voltage pulses or the teeth of the encoder gear, the so-called Zahnzeiten, measured. Then the evaluated measured tooth times and the course of the crankshaft acting moment M of the internal combustion engine determined.

In 1 is in the lower half of the course 6 tooth times for the teeth of a donor gear during two full revolutions of the crankshaft shown. On the abscissa, the individual numbers of teeth z are plotted. As encoder gear a so-called. 60-2 gear was used. The number of teeth z on the abscissa are numbered from 1 to 60 for the previous revolution of the crankshaft and then from 1 to 60 for the instantaneous revolution of the crankshaft. For the course 6 The tooth times tz is the right ordinate, on which the tooth times tz are given in 10 ^-6 s. The history 6 The tooth times tz was determined in the present embodiment at the operating point of a 12-cylinder diesel engine at 3,000 rpm under 80% load.

In the upper half of 1 is the course 7 a characteristic shown in the context of the evaluation of the tooth times tz for determining the applied torque of the internal combustion engine M according to the inventive method from the course 6 the tooth times tz was determined. The extremes of the characteristic curve are a measure A for the moment M. applied by the internal combustion engine 7 the characteristic is the left ordinate.

Around To determine the characteristic curve of the tooth times tz, first becomes a Block size B off the quotient of the total number Z of the teeth of the encoder gear and the Total number of cylinders of the cylinder of the internal combustion engine defined. Consequently applies in the present example for the block size B = Z / Zyl = 60/12 = 5.

In In the present example, to determine the characteristic only the tooth times tz of the full immediately preceding fullness Rotation of the crankshaft considered. Deviating from this, however, it is also conceivable, the tooth times tz over any Rotations of the crankshaft, so not just one or more full Revolutions, but also about to take into account a part or a multiple of a revolution.

The tooth times are subdivided into twelve blocks, each of which includes a number of tooth times tz corresponding to the block size B = 5. Start to calculate the first characteristic point the teeth times 336.5; 336.0; 336.5; 335.0 and 335.5 for the first five teeth z = 1 to 5 (block 1) and ends at 336.5; 333.5; 335.0; 335.5 and 335.0 for the last five teeth z = 56 to 60 (block 12). In each of these twelve blocks, the sum of the included tooth times tz, the so-called block sum z_i, is then formed. In the first block i = 1, which includes the tooth times tz of the teeth z = 1 to 5, the result is a block sum z_1 = 1679.5. In the last block i = 12, which includes the tooth times tz of the teeth z = 56 to 60, the result is a block sum z_12 = 1675.5.

The block sums then become a first characteristic point of the characteristic curve 1 by the equation (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) / (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) calculated. For the first characteristic point is thus obtained (1679.0 + 1677.5 + 1673.0 + 1676.0 + 1670.0 + 1675.5) / (1679.5 + 1686.5 + 1680.0 + 1676.0 + 1683.5 + 1677.5 ) = 0.9968

This value is in the upper half of 1 drawn as part of the characteristic shown above the tooth z = 60 of the previous revolution of the crankshaft.

Instead of the equation for calculating the characteristic point used according to the present embodiment, one of the other equations may also be used: (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) / (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) . (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) - (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) or (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) - (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) ,

All three equations determine a characteristic from the block times z_i whose extremes are a measure of that of the internal combustion engine applied torque M are.

to Calculation of the second characteristic point, the blocks by one Tooth shifted to the right, d. H. the tooth times tz start at 336.0; 336.5; 335.0; 335.5 and 335.5 for the first five Teeth z = 2 to 6 (block 1) and end with 333.5; 335.0; 335.5; 335.0 and 335.5 for the last four teeth z = 57 to 60 of the previous revolution of the crankshaft and for the first tooth z = 1 for the instantaneous rotation of the crankshaft (block 12). In each of these will be twelve blocks then the block sum z_i formed. In the first block i = 1 results thus a block sum z_1 = 1678.5. In the last block i = 12 this results in a block sum z_12 = 1674.5.

From the block sums, the second characteristic point of the characteristic curve then becomes 1 by the equation (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) / (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) calculated. For the second characteristic point is thus obtained (1680.0 + 1677.0 + 1673.0 + 1673.0 + 1679.0 + 1670.5) / (1678.5 + 1686.0 + 1680.0 + 1674.5 + 1680.5 + 1679.5 ) = 0.9975

This value is in the upper half of 1 drawn as part of the characteristic shown above the tooth z = 1 of the current rotation of the crankshaft.

To calculate the additional characteristic points, the blocks are pushed over the measured tooth times tz and the block times z_i and the characteristic curve point are calculated in each case. If the individual characteristic points are then connected to each other, the results in the upper half of 1 illustrated characteristic. The characteristic curve has six periods per revolution of the crankshaft. The extremes of the characteristic curve are a measure of the moment M. applied by the internal combustion engine.

Around It is conceivable to save computing time, not every characteristic point to calculate the characteristic, but only the characteristic points at the teeth z = 5, 15, 25, 35, 45 and 55 of the instantaneous revolution of the crankshaft to calculate at which the maxima occur and / or at the teeth z = 10, 20, 30, 40, 50 and 60 of the instantaneous rotation of the crankshaft calculate where the minima occur. So it will be preferable only those characteristic points calculated, at which an extremum the characteristic is. Because the extrema of the characteristic for a given Internal combustion engine always at the same teeth of a revolution of the crankshaft occur, can be determined exactly which teeth z the Characteristic points must be calculated.

In 2 is a flowchart of the inventive method for determining the applied torque of an internal combustion engine M by evaluating the rotational speed of the crankshaft Internal combustion engine shown.

In Block 1 will be first defines a block size B. The block size can For example, from the quotient of the total number of teeth Z of the encoder gear and the total number of cyl. the cylinder of the internal combustion engine formed become.

In Block 2 of the flowchart is then the block formation, d. H. summarizing several teeth times tz into blocks. It For example, the tooth times tz of the immediately preceding revolution considered the crankshaft. The Number of tooth times tz, which are combined into a block, corresponds to block size B.

In Block 3 will follow the block times z_i calculated. The block times z_i can optionally by averaging or summing the individual tooth times tz of a block be formed.

In block 4, a characteristic point is calculated according to one of the following equations from the block times z_i. (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) / (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) . (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) / (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) . (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) - (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) or (z_1 + z_3 + z_5 + z_7 + z_9 + z_11) - (z_2 + z_4 + z_6 + z_8 + z_10 + z_12) ,

in the Connection to Block 4 can either go to block 2 to calculate other characteristic points or branched to block 5.

The individual calculated characteristic points form the characteristic curve whose Extrema a measure of that the internal combustion engine applied torque M are. In block 5 will be evaluated the extremes of the determined characteristic curve with the aim from the extremes the moment applied by the internal combustion engine M to determine. Can do this either the maxima of the characteristic, the quotient of maxima and minima or the quotient of minima and maxima of a period of the characteristic or the difference of maxima and minima or the difference of Minima and maxima of a period of the characteristic are used.

Claims (9)

Method for determining the torque (M) applied by an internal combustion engine by evaluating the rotational speed (n) of the crankshaft of the internal combustion engine with a transmitter wheel provided with markings on the periphery, which rotates with the crankshaft relative to a pickup, the pickup measuring the time intervals (tz ) between the marks of the sender wheel, wherein - a block size (B) is defined, and - each one of the block size (B) corresponding number of time intervals (tz) between the marks of the sender wheel of the recorded during the previous rotation of the crankshaft intervals (tz) is combined into blocks, characterized in that - for a recorded during a rotation of the crankshaft time interval (tz) from the recorded during a previous rotation of the crankshaft intervals (tz) a characteristic point is determined, wherein - in the blocks the block sum (z_i ) the time intervals (tz) recorded during the previous rotation of the crankshaft are formed, and from the block sums (z_i) the characteristic point according to the equation SUM_i (z_2i-1) / SUM_i (z_2i) or SUM_i (z_2i) / SUM_i (z_2i-1) is determined, where i is a positive natural number, and - is determined by evaluating the extrema of a running through the determined characteristic curve curve, the applied torque of the internal combustion engine (M). Method for determining the torque (M) applied by an internal combustion engine by evaluating the rotational speed (n) of the crankshaft of the internal combustion engine with a transmitter wheel provided with markings on the periphery, which rotates with the crankshaft relative to a pickup, the pickup measuring the time intervals (tz ) between the marks of the sender wheel, wherein - a block size (B) is defined, and - each one of the block size (B) corresponding number of time intervals (tz) between the marks of the sender wheel of the recorded during the previous rotation of the crankshaft intervals (tz) is combined into blocks, characterized in that - for a recorded during a rotation of the crankshaft pitch (tz) from the recorded during a previous rotation of the crankshaft intervals (tz) a characteristic point is determined, wherein - in the blocks, the block sum (z_i) during the is formed from the previous rotation of the crankshaft recorded time intervals (tz), and - from the block sums (z_i) of the characteristic point according to the equation SUM_i (z_2i-1) - SUM_i (z_2i) or SUM_i (z_2i) - SUM_i (z_2i-1) is determined, where i is a positive natural number, and - is determined by evaluating the extrema of a running through the determined characteristic curve curve, the applied torque of the internal combustion engine (M). Method according to claim 1 or 2, characterized that the block size (B) off the quotient of the total number (Z) of the marks of the sender wheel and the total number (Cyl) of the cylinders of the internal combustion engine defined becomes (B = Z / Zyl). Method according to one of claims 1 to 3, characterized each one of the block size (B) corresponding Number of time intervals (tz) between the marks of the sender wheel during at least a previous revolution of the crankshaft recorded temporal distances (tz) to blocks is summarized. Method according to claim 4, characterized in that each one of the block size (B) corresponding Number of time intervals (tz) between the marks of the sender wheel during the recorded immediately preceding rotation of the crankshaft time intervals (tz) to blocks is summarized. Method according to one of claims 1 to 5, characterized that only for the while the rotation of the crankshaft recorded time intervals (tz) a characteristic point is determined at which the characteristic is an extreme having. Method according to one of claims 1 to 6, characterized that the maximum of the characteristic during a period of the characteristic as a measure (A) of that of the internal combustion engine Applied moment (M) is used. Method according to one of claims 1 to 6, characterized that the difference between the maximum and the minimum of the characteristic while a period of the characteristic as a measure (A) of that of the internal combustion engine Applied moment (M) is used. Method according to one of claims 1 to 6, characterized that the ratio of the maximum to the minimum of the characteristic during a period of the characteristic as a measure (A) for that of the internal combustion engine applied torque (M) is used.