DE2414833A1 - METHOD AND DEVICE FOR PERIODIC CONTROL OF A FUNCTION DEPENDING ON THE ROTATING SPEED OF A SHAFT - Google Patents

Description

PATENT LAWYERS

DR.-ING. BY KREISLER DR.-ING. ALREADY FOREST

DR.-ING. TH. MEYER DR. FUES DIPL-CHEM. ALEK VON KREISLER DIPL.-CHEM. CAROLA KELLER DR.-ING. KLOPSCH DIPL.-ING. SELTING

5 COLOGNE 1, DEICHMANNHAUS 9A1A833

March 26, 1974 Sg-Is

SOCIETE ANONYME POUR L'EQUIFEMENT ELECTRIQUE DES VEHICUIES S.E.V. MARCHAL, 26, rue Guynemer, 92132 - ISSY LES MOULI-NEAUX, France

Method and device for the periodic control of a dependent on the rotational speed of a shaft function

It is well known that pre-ignition is required to ensure proper operation of a piston engine, e.g. a car engine of the flammable gases, i.e. an ignition before the top dead center of the piston during the work cycle in the respective Cylinder necessary. In the case of devices of the classic type, the pre-ignition is carried out with the aid of a centrifugal ignition adjuster and achieved with the help of a vacuum ignition adjuster. These two devices represent the mechanical controls that operate on the respective position of a cam and an interrupter speak to. The cam is rotated by the motor, and the breaker is in the primary circuit switched by an ignition coil. In this device, the presence of numerous mechanical parts is one not insignificant cause of the malfunction. Also effect

- 2 409841/0327

24H833

the rapid opening and closing of the breaker gradually wear out the contacts, so that frequent inspections are a prerequisite for proper operation.

In order to avoid the disadvantages which can be attributed to the use of a breaker, have already been Ignition systems proposed in which the changes in the magnetic flux in a magnetic Circuit with a magnetic sensor and a cam rotated by the motor is provided. This device avoids the regular maintenance of the manifold, since the platinum-plated ones Screws, which represent the contacts of the breaker, become superfluous, but they do not change anything the complexity of the centrifugal timing advance and the vacuum timing advance. From this it follows that that the reliability and operational safety of the ignition system is not increased

The object of the invention is to create an ignition point control with a large possible field of application, which especially in the case of a piston engine, an ignition point shift using only electronic ones Elements and avoiding mechanical devices that are normally necessary. In the case of changes that correspond to the centrifugal adjustment, it is possible to rely entirely on mechanical Parts to be omitted, however, with those adjusting devices that correspond to the vacuum adjustment, at least one manometer capsule must be available. which reacts to the negative pressure in order to become dependent

- 3 -409841/0327

24U833

from this to control the ignition timing. With the invention It is also possible to adjust the ignition as a function of any mechanical device or to change electrical parameters that increase the load on the engine as a function of the accumulation the fuel mixture or the temperature of the exhaust gases or the mean engine temperature, the is derived from the cooling water or the oil in the engine block. The inventive method and the However, the corresponding device can also be used in areas other than that of controlling the Finding ignition delay: in particular, the invention is also suitable for controlling the duration of the current conduction of the primary circuit of an "ignition coil and not just to control the time of interruption through which the Ignition is triggered. The invention also allows the additional devices connected to a vehicle engine to control, such as a petrol pump, an automatic starter, a device for the injection of fuel, a carburetor, an air pump or an automatic transmission, these being The list is of course not exhaustive.

The device according to the invention forms an electronic numerical computer, which its information from a certain number of sensors and in particular from a speed sensor that receives the Rotation speed of a shaft determined, for example, in the event that the ignition of a piston engine is to be controlled, a shaft can be connected to the crankshaft or a camshaft of the motor

- 4 409841/0327

24U833

tors is connected. The electronic computer transforms the information received into control signals, which are delivered either to the ignition coil or to any additional equipment described in the above Way to be controlled. Using a numerical calculator brings the benefit of a large one Insensitivity to disturbances, which is the case with devices that work according to the analog computer principle, is not the case. Furthermore, the structure of the computing device according to the invention enables to realize any ignition lag curve to either the air pollution properties of a To improve the motor or to adapt it to a specific operating mode of the motor by makes the ignition advance dependent, for example, on the average engine temperature. Finally must be underlined be that the cost price of the device according to the invention is relatively low, and that a Increasing the complexity of the displacement curve does not have too great an impact on the price.

To solve these problems and to achieve the advantages mentioned, a method for periodic Control of at least one function which is dependent on the rotational speed of a shaft and in which the control with a phase shift with respect to the passage of a mark provided on the shaft on one fixed marker is triggered, the phase shift being a function of the speed of rotation of the shaft, it is provided that a signal is generated whose duration corresponds to the passage of a sector of rotation corresponds to the angle 3 in front of the fixed marking,

- 5 409841/0327

2AU833

that one determines the duration of this signal and then also the corresponding speed of rotation that the value of the time between the control to be carried out and the start of the and that this time is counted from the beginning of the following signal and the triggering caused by the control.

In a preferred embodiment of the method according to the invention it is also provided that the duration of the signal is carried out by comparison with a reference time, for example supplied by a clock generator; that the comparison with the reference time is made by counting the number of time units of the reference time by a first counter; that the period of time between the command to be executed and the start of the following signal is determined on the basis of the duration of the previous signal by a programmed numerical computer that contains a discriminator for different Geselh SPEED zones of the rotating shaft, the curve of the phase shift as a function the speed of rotation in each of these zones is formed by a curve segment; that the curve segment in each zone of the phase shift curve is a straight line segment, and that the angle y of the sector of rotation passing the fixed marking is constant; that the counting of the period between the beginning of the following signal and the command to be implemented is carried out by comparing the count of the first counter during the following signal with the value stored during this time, and that the command is triggered when between the counted

- 6 409841/0327

24U833

Value and the stored value equality exists.

A device for carrying out the method according to the invention, in particular for carrying out the ignition adjustment of a piston engine with respect to the top dead center of each piston travel is according to the invention characterized by the following assemblies:

1. a fixed sensor, which is connected to a shaft whose speed of rotation is to be triggered Command determined, fortified sector cooperates, the feeler during the passage of the sector generates a speed signal of duration P,

2. at least one device for generating a reference signal, e.g. a clock,

3. a first counter to determine the duration of the Speed signal and possibly to determine the duration of the speed signal behind the starting edge as a function of the unit duration of the reference time,

4. a second counter for simultaneous positive and negative counting, which counts its counting pulses from a numerical computer, which receives its information from the first counter, from the time reference sources, from the speed signal, e.g. in the case of an ignition device from the centrifugal force adjustment, and possibly received from a corresponding complementary signal, which e.g. in the case of a device

- 7 -409841/0327

device to control the ignition adjustment of the vacuum adjustment corresponds, with the two counters each being reset to zero,

5. a memory for storing the information pending at the outputs of the second counter, wherein a command sequence to store the information of the second counter in the memory during the run the leading edge of the speed signal before resetting the count of the second Caused the counter to zero while resetting the first counter to zero when passing through the Leading edge of the speed signal or at a point in time thereafter, and wherein the information remains stored in the memory until the leading edge of the next following speed signal passes by, and

6. a comparator for triggering the command to be generated, e.g. opening the primary circuit of a Ignition coil, if the information at the outputs of the memory matches that at the outputs the information pending on the first counter is the same.

In the following, the terms AND gate are used indiscriminately to identify the electronic components used or OR gate or NAND gate ("and not") or NOR gate ("or not") are used. For these components will be the symbols shown in Figs. 29, 30, 31 and 32, respectively used. Amplifier-type components are accordingly shown in Fig. 33, and a

- 8 409841/0327

Inverter is shown in Fig. J> K.

In a preferred embodiment of the invention Device is provided that the computer has a discriminator for the speed zones, which sets the position of the trailing edge of the speed signal in relation to the position of the trailing edge at least of a signal of predetermined duration, the leading edge of which coincides with that of the speed signal coincides, and that the duration of the predetermined signal corresponds to a rotational speed which can in particular limit two successive zones of the phase shift curve.

In the event that the phase shift curve consists of a group of several straight line segments, this is Angle L of the sector of rotation moving along a fixed marking, constant. This is more advantageous Way provided that a zone or the phase shift curve is designed as a segment whose ordinate intersection is not equal to zero, that the computer controls a frequency divider based on a Pulse frequency F Generates pulses of frequency F / n, where η is the sum of a finite series of the general Expression is 2, and where the number of members of the series is equal to the number of stages from which the Frequency divider exists. In the case of a step on the ordinate c, the number η is essentially the same ^ / ο. During the entire duration of the speed signal, the second counter counts those from a time reference source The pulses supplied are positive and the pulses of frequency F / n supplied to it by the frequency divider

- 9 409841 / Ü327

24H833

negative. In a zone in which the phase shift curve is a segment with a positive slope, which either goes through the origin or not, the computer controls a duration decoder which is connected to the outputs of the first counter and generates a signal in each period of the speed signal consisting of a pulse the duration of which is predetermined for each zone of interest. Finally, a device according to the invention can be improved in that in the case of a segment going through the origin with the positive slope k = c? / N, where Θ is expressed in degrees and N in rpm, the duration A = k / 6, and that during the duration of the speed signal the second counter during the time A from the beginning

of the speed signal is blocked and then the pulses of frequency F coming from a time reference source are counted. A zone or the phase shift curve is a segment with a positive slope and an ordinate origin ο. The computer switches on the frequency divider and the duration decoder at the same time. Depending on whether ο is positive or negative, the second counter counts, during the duration of the speed signal, the pulses of frequency F / n fed to it by the frequency divider, positive or negative, with η being essentially equal to r / cJ. At the same time, after the time A, during which it remains blocked, the second counter counts the pulses of the frequency F positive fed to it by a time reference source. A in seconds is essentially equal to c7 / 6N, where G is in degrees and N is in rpm. In a zone or in the phase shift curve there is a segment with a negative slope and po-

- 10 -

409841/0327

- IC -

2AU833

sitive ordinate intersection ü, available. The computer switches on the frequency divider and the duration decoder at the same time. The second counter counts during a time R substantially equal to c / 6N supplied to it from a time reference source Pulses of frequency F positive, where t? in degrees and N is expressed in RPM. The second counter counts simultaneously for the entire duration of the speed signal the pulses of frequency F supplied to it by the frequency divider - essentially equal to ^ / σ.

led impulses of frequency F - ^ - positive, - where η

The second counter is controlled separately by a distributor for positive and negative counting. The distributor is divided into two independent parts, each of the two parts with the following assemblies connected to: a speed discriminator, a frequency divider, a speed sensor, two time reference sources, one of which is preferably common to both parts mentioned, possibly with the output of a generator generating a complementary signal, which for example in the case of a device for ignition adjustment corresponds to a vacuum adjustment, the first being determined for the positive count Part is connected to the duration decoder and the second part is intended for negative counting, The distributor is derived with three of the same clock generator of the basic frequency F, via a clock frequency divider Time bases supplied, each supplying signals of the frequency F -, / 3, which are against each other by each a third of the period are offset. The speed sensor is a magnetic one

- 11 409841 / Ü327

2AH333

Proximity sensor that responds to an indentation or projection of the sector angle ^ on the shaft. The device for determining the ignition timing for a piston engine is characterized in that the The shaft to be scanned is the steering wheel of a crankshaft or a camshaft of the engine. The second counter contains ρ binary outputs, each of which is connected to a trigger. Another entrance of the flip-flops, preferably with the interposition of a signal inverter, is connected to the memory, the has a flip-flop output. The comparator is, on the one hand, made up of one with the first output of the memory and the NOR gate connected to the first counter and on the other hand connected to p-1 identical memory cells, of which the input of one is connected to the output of the preceding, each Memory cell is connected to an output of the memory and the associated output of the first counter and preferably contains four NAND elements. The device for determining the ignition advance in a piston engine is characterized in that a with The combiner connected to the position sensor, the discriminator and the comparator determines the duration of the speed signal compares with a predetermined pulse duration obtained from the discriminator and starting from this comparison determines the time during which the primary circuit of an ignition coil is for one period stays open and closed. The generator of the complementary signal consists of a manometer capsule, whose membrane controls the displacement of a grinder that grinds on a group of conductive tracks, from which each according to the position of the grinder

- 12 409841 / Ü327

24H833

may or may not be controlled. Each track is connected to an input of the distributor and is located there for example at the entrance of a NÄND gate, the other one Input is connected to an input of the frequency divider. The selection of the outputs connected in this way of the frequency divider is made according to the value assigned to each track.

In a first embodiment of the invention it is provided that the discriminator and / or the decoder and / or the frequency divider receive signals from at least one two-point sensor originate which at least detects a functional parameter of the connected motor or the device, and that these signals the signals of a predetermined length of time relative to which the positive or negative count of the Clock generator or the clock frequency divider originating pulses change. The (or the) two-point sensor is (or are) through the position of a gas throttle valve and / or by the temperature of the engine and / or by accelerating or decelerating the Motor controlled. The sensor for acceleration or deceleration of the motor contains an upward and a Down counter that generates a signal depending on whether the number of pulses of the clock generator during the duration of a speed signal greater than or possibly equal to the number of pulses from the clock generator is for the duration of the following speed signal.

In another embodiment of the invention it is provided that the discriminator, the decoder and the

409841/0327

24H833

Frequency divider at least partially from one with one Addresser connected dead memory consists of the information from the main counter and any provided Receives two-point sensors, and that the dead memory a binary word is generated as a puncture of the input configuration, its elements, preferably with the interposition a buffer memory, the comparator and the frequency divider.

409841/0327

_ 14 -

The invention is described below with reference to FIG the figures explained in more detail using two exemplary embodiments. Show it:

1 shows an ignition curve which can be realized with the device according to the invention and which reproduces the ignition angle adjustment & in degrees as a function of the rotational speed N,

2 schematically shows a front view of the steering wheel of a crankshaft and the associated proximity sensor,

FIG. 3 shows the results obtained at the output of the sensor of FIG Signals and the current in the primary coil of the ignition coil connected to the device according to the invention,

4 shows the representation of the pre-ignition corresponding to a signal received from the sensor over the sensor signal the following period,

5 shows a signal corresponding to an ignition curve segment with constant ordinate,

6 shows the basic circuit diagram of a device according to the invention,

7 shows the signal profile for an ignition curve segment with negative ordinate intersection,

8 shows the signal profile for an ignition curve segment with a positive slope and a positive ordinate intersection in the origin,

- 15 409841/0327

9 shows the signal profile for an ignition curve segment with positive slope and negative ordinate intersection,

Fig. IO shows the signal profile for an ignition curve segment with negative slope and positive ordinate passage,

11 shows the diagram of a frequency divider of a clock generator,

FIG. 12 shows the signal profile at the various points of the frequency divider of the clock generator according to FIG. 11,

13 is a synoptic block diagram of the invention Contraption,

14 schematically shows the speed discriminator the device according to the invention,

FIG. 15 schematically shows one connected to the discriminator of FIG Fig. 14 connected signal generator,

16 shows three pulse time decoders for generating signals of predetermined duration,

Fig. I? the first counter of the device according to the invention,

Fig. 18 shows those at various points on the main counter and the frequency divider connected to it, detachable signal curves,

- 16 A098A1 / 0327

19 shows the circuit diagram of the frequency divider of the invention Contraption,

Fig. 20 shows a type of circuit used when the Output signals of the frequency divider generate the counting signal for the second counter,

21 shows the circuit diagram of the positive counting part of the Distributor on the second meter of the device according to the invention,

22 shows the circuit diagram of the negative associated with the second counter of the device according to the invention Counting part,

23 shows the manometer capsule of the vacuum adjuster and its contacts in perspective,

FIG. 24 shows the device of FIG. 23 schematically in FIG Side view,

25 shows the circuit of the second counter of the invention Contraption,

26 shows the blocking circuit for storing the display values of the second counter,

27 shows the circuit of the comparator part which enables the comparison between the display values at the output of the first counter with those of the locking circuit according to Fig. 26,

- 17 409841/0327

24U833

Pig. 28 is a circuit diagram of the primary circuit of an ignition coil,

29 the switching symbol for an AND gate, FIG. 30 the switching symbol for an OR gate, 31 shows the circuit symbol for a NAND gate, 32 the circuit symbol for a NOR gate, Pig 33 the circuit symbol for an amplifier, Fig. 3 ^ the circuit symbol for an inverter,

35 shows a group of three that can be implemented with a device according to the first variant of the invention different ignition curves as a function of the output signals from two-point sensors that point to the position of the Throttle valve of the engine on the one hand and the temperature of the engine on the other hand respond,

36 shows the circuit of the positive counting part of the distributor; which belongs to the second counter of the device with which the curve according to Fig. 35 is obtained,

37 shows the circuit of the negative counting part of the distributor which is connected to the second counter of the device for Realization of the curves shown in Fig. 35 belongs and

Fig. 38 the circuit of a sensor for the command

- 18 409841/0327

24U833

inclination or deceleration of the motor rotation, which as Two-point outside sensor can be used for the device according to the first variant of the invention can.

The device explained below is used for implementation an analog ignition adjustment or a pliehkraft ignition adjustment classic type. The change in the ignition advance as a function of the speed of rotation of the engine is shown in the curve in Fig- I'- Here the starting point is designated by 1 and the delay point by 2. A distinction is made between three speed ranges above the deceleration point, separated by intermediate points 3 and 4 are. The pre-ignition curve is divided into four straight segments 5, 6, 7 and 8. The segment 5 corresponds to the deceleration, i.e. an operation with a decreasing speed of the motor. The curve has in this area a negative slope and a positive ordinate passage. The segment 6 has one positive slope and a negative ordinate passage. The segment 7 has a positive slope and a positive ordinate passage, and the segment 8 forms a step with a constant ordinate value. The curve shown in Fig. 1 corresponds to a centrifugal adjuster taken as an example. It it is clear that all other adjustment curves of centrifugal adjusters by approximation with a polygon can be modeled using similar elements as in the curve in FIG. Every segment corresponds to a range of the rotational speed of the motor. In other words, the present-

- 19 -

409841/0327

24H833

The example can easily be extended to the realization of any pre-ignition curve, with Any any curve shape can be achieved. The following also explains how to adjust the vacuum the pulling force distribution according to the curve of Fig. 1 superimposed.

The device according to the invention has one opposite A proximity sensor 9 arranged on a steering wheel 10 as a position sensor. The steering wheel 10 can, for example be the steering wheel of a crankshaft. At its edge there is a zone of the central angle 4- an indentation 11. The boundary edge 12 of the indentation 11 moves in the opposite direction in the indentation for the rotation of the steering wheel 10 and corresponds to the top dead center of the cylinders of the engine, to which the steering wheel 10 is assigned. The proximity sensor 9 provides a speed signal that through Line 13 in Fig. 5 is represented. During the As the indentation 11 passes in front of the sensor 9, the sensor delivers a signal 14, its leading edge 15 corresponds to the passage of the edge 12 on the sensor 9. The line l6 of FIG. 3 represents the feed current the primary circuit of the ignition coil assigned to the engine. The ignition corresponds to the moment in that the current in the primary circuit is interrupted, i.e. that the start of ignition on the leading edge

17 takes place, which allows the passage of current through the primary circuit completed. This passage corresponds to the zone

18 from line l6. Between two successive zones 18 there is a zone 19 in which the current does not flow in the primary circuit of the coil. The length of a

- 20 409841/0327

24U833

ner zone 18 corresponds to the flow time of the current t

. on

and the length of zone 19 corresponds to the transit time E of the spark. The ignition advance is the in Fig. 3 roit AV designated time span, which is the above defined edges 15 and 17 separates from each other.

The time span AV of the ignition advance must be variable as a function of the operating conditions of the engine. This time span AV corresponds to the passage of a part with the central angle b of the indentation 11 along the sensor 9. It is clear that the angle ^ is chosen such that it is greater than the maximum adjustment angle Q ₃ which corresponds to the intersection of the ordinates (origin) t) of the segment 8 of the curve in FIG. 1. In the special case, 4 = Choose 50. If P denotes the duration of the signal 14, expressed in seconds, and N denotes the number of revolutions per minute corresponding to the rotation of the steering wheel 10, the following two relationships are obtained:

P = ^ / 6N and AV = Θ / 6Ν.

The device according to the invention has the effect that the time period AV and the corresponding angle as a function of the rotational speed N have those values which correspond to the curve of FIG. To this to achieve, the device determines the speed zone in which the engine is located, and derives the predetermined characteristic values of the segments 5 * 6, 7 or 8, which it takes into account, depends on it.

The principle of operation of the device according to the invention

- 21 -

409841/0327

24H833

is shown in FIG. In this figure it can be seen that the sensor 9 corresponds to speed signals Line 20 releases. The speed signals 14 are shown in solid lines, it being noted that this signal is periodic, which is why it is indicated that the remainder of the curve in line 20 is shown in dotted lines. Simultaneously with the signal 14, the device according to the invention generates, as will be explained below, a signal 21, the duration of which is the desired Ignition advance corresponds to AV. The time period R between the leading edge of the signal 21 and the leading edge of signal 14 is determined and accordingly, as shown by line 22, a signal 23 is generated which begins simultaneously with the subsequent signal 14 and has a duration that is equal to R. If one designates the leading edge of this signal 23 with 24, the duration is between the edge 24 and the edge 15 »the signal 14, its leading edge with that of the signal 23 is synchronized, limit, equal to the time period AV, if one assumes that between the two successive signals 14 only slight Changes to the engine operating mode are made. You can therefore initiate the ignition with the edge 24 of the signal 23 and will thus take into account the conditions given by the curve in FIG. 1. These Operating mode means that a value of the ignition shift is used or evaluated for one cycle which corresponds to the rotation speed of the previous cycle. It is easy to see that this mode of operation, even for piston engines, is exposed to the modes with the most abrupt transitions

- 22 -

409841/0327

are causing an error that is opposite to that normally When realizing an ignition advance, the tolerance to be taken into account is negligibly small is.

It is expedient to generate a signal whose duration is equal to the duration AV which is taken into account the speed of rotation of the motor is aimed at. The different cases that see in the Offer curve of Fig. 1, are checked in the following.

First of all, the realization of a ignition release for a curve corresponding to segment 8 is checked. The ordinate intersection or origin of segment 8 is denoted by c *. One can define a number η such that 0 _o = ψ / η . FIG. 5 shows schematically the various pulse trains which arise in the meantime in order to finally obtain the desired result. Line 25 denotes the signal 14, which is picked up at the proximity sensor 9. Throughout the entire signal 14, a first counter 26, referred to as the "main counter", is switched on. This counter counts the pulses supplied to it by an H pulse generator. The counter 26 is made effective by an AND gate 27 which is controlled on the one hand by the clock H and on the other hand by the sensor 9. The signal at the output of the counter 26 corresponds to the line 28 in FIG. 5. The signal amplitude increases steadily during the time in which the signal 14 is present, and at the moment of the passage of the leading edge 15 assumes a value o (P, which corresponds to the duration P. of the signal

- 23 409841/0327

24U833

is proportional. The circuit 27 also feeds a second counter 29 which is driven in parallel from the output of the circuit 27 and from the output of a frequency divider JO . The second counter 29 supplies a signal shown by line 31 in FIG. 5 at its output. The second counter 29 on the one hand counts positively in the same way as the counter 26, which delivers a counting result otp at the end of the signal 14, and on the other hand simultaneously counts down the pulses supplied to it by the frequency divider 30 (negative counting). The frequency divider 30, upon receipt of the pulses of N pulses emitted by the clock generator H at the frequency F, allows only a single one to pass through to its output, N being a number which can be selected at will in advance. The result of the countdown process reached at the end of signal 14 finally has the value oi. p / n. It follows from this that the total value obtained at the output of the second counter 29 is> * P (1-l / n). This value is stored in a memory 32 (locking) and compared with the result at the output of the counter 26 during the duration of the next signal 14. This comparison is symbolized in FIG. 5 by the arrow f. It is carried out with a comparator 33 which compares the output signals of the memory 32 and the first counter 26. If the signals at both outputs are the same, which corresponds to the point on line 28 in FIG. 5, the comparator generates a signal at its output which contains a signal 36, represented by line 35 in FIG Signal 14 is synchronized, interrupts. It can be seen that between point 34 and the end of the corresponding signal

- 24 40984i / ü327

24H833

14 lying time is equal to P / h, and that consequently the leading edge of the signal 36 for triggering the ignition can be used, i.e. to open the primary circuit of the ignition coil.

The triggering of the ignition in relation to the negative pressure corresponds to one of the rotational speed of the Engine independent ignition angle. Hence one has to add an adjustment which is in a speed range corresponds to a stepped paragraph and is therefore obtained in the manner described above can to influence the ignition release depending on the negative pressure. If you have the special case the realization of such an ignition advance begins in which the displacement angle θ as a function of the rotational speed N curve of the motor is a straight line segment with the positive slope k and with a positive ordinate passage, you can see that

ü = kN = 6AV χ Ν. It follows that AV is a has constant value A. Accordingly, it is sufficient if the device shown schematically in FIG. 6 is used used, the counter 26 with the frequency of the clock H during the entire duration of the signal 14 count to allow the counter 29 to be blocked during the time A from the beginning of each signal 14, thereafter to let the counter 29 count up with the frequency of the clock H, the counting result of the counter 29 in in the memory 32 and in the comparator 33 during the following signal 14 the value of the output signal from counter 26 with those stored in memory 32 Value to be compared, whereby the comparator emits the trigger signal for the ignition if equal-

- 25 409B41 / 0327

24H833

unity of its two input signals is reached. Fig. 7 shows in line 37 the signal 14 and its starting edge 15 'corresponding to the top dead center in line 38 the output signal of the counter 26, in line 39 the Output signal of the counter 29, and the arrow symbolizes f1 the comparison carried out on the comparator 33, line 40 schematically represents the output signal 41 of the comparator 33, the leading edge of which is the trigger the ignition causes.

The following now deals with the triggering of the ignition in a zone in which the curve in FIG. 1 is a straight line segment with the positive slope k and positive ordinate passage ο. In the implementation to be carried out, two simple cases that have already been considered must be superimposed. From the diagram shown in FIG. 6 it can be seen that the counter 26 counts in the rhythm of the clock H during the entire duration of the signal 14. The counter 29 counts during the entire duration of the signal 14 in the rhythm supplied by the frequency divider 30, the frequency F / n of the pulses supplied by the frequency divider being determined by the value η = ¹ P / S. After a time A = k / 6 has been counted starting from the beginning of the signal 14, the counter 29 is allowed to count positively in the rhythm of the clock H. The total value of the signal obtained at the output of the counter 29 is entered into the memory 32, where it is stored. The comparator 33 then effects the comparison between the output signals of the main counter 26 and the memory 32 during the following signal 14.

- 26 -

-841/0327

24H833

The comparator supplies the signals with a signal edge that triggers the ignition. 8 shows with line 42 the signal 14 generated by the sensor 9, with a line 43 the signal generated at the output of the counter 26 and with line 44 the signal generated at the output of counter 29. This signal is shown in solid lines, however, the resulting value for the area that corresponds to the initial period of duration is A. follows, the sum of a positive count in the rhythm of the clock H and a negative count in the supplied by the frequency divider 30 rhythm. These two simultaneous counts are shown in dashed lines. The arrow f ~ symbolizes the one on the comparator 33 comparison carried out. Line 45 provides that The output signal of the comparator 33, the front edge of which 46 causes the ignition to be triggered.

Let us now consider the case in which the ignition release according to FIG. 1 corresponds to a straight line segment with a positive slope k and a negative ordinate passage ο. This case is represented by segment 6. On the basis of what has been said above, it is clear that it is sufficient to invert the counting sense of the angle ο , which corresponds to the ordinate passage, compared to the example in FIG. In FIG. 9, line 47 denotes signal 14 and its leading edge 15 generated by sensor 9, line 48 denotes the output signal of counter 26, line 49 denotes the output signal of counter 29 and line 50 denotes the output signal of comparator 33 · Der Counter 29 counts positively in the rhythm F / n, which is generated by the frequency divider 30, during the time A _Q , calculated from the start

- 27 403841/0327

2AU833

start of signal 14. A is equal to k / 6, η is equal to 4 / c and the frequency P is generated by the clock generator H. After the time A, the counter 29 continues to count positively in the rhythm F / n and, on the other hand, counts positive in rhythm F. The comparison carried out in the comparator 33 is indicated in FIG. 9 by the arrow f-, symbolizes.

Finally, the case is dealt with that the ignition release according to FIG. 1 corresponds to a straight line segment with the negative slope k and the positive ordinate passage C-. This case corresponds to segment 5. The signals corresponding to the various elements shown in FIG. 6 are shown in FIG. 10 in this case. In this figure, line 5L draws signal 14 and its leading edge 15 - line 52 produced by sensor 9 - denotes the output signal of counter 26, line 53 denotes the output signal of counter 29 and line 54 denotes the output signal of comparator 33. The signal on line 52 is identical to that of the lines 28, 38, 43 and 48. The signal of the line 53 corresponds to a positive count of the counter 29 in the rhythm of the clock H during a time (p - lkl / 6) ρ is the duration of the signal 14 in seconds and k is the slope of the segment 5, expressed in units of the ordinate and the abscissa which have previously been selected for the curve of FIG. Simultaneously during the entire duration P of the signal 14 there is a positive count in the rhythm F (1 - -) which can be taken from the output of the frequency divider 30, where η = ¹ ^ / O ₁ . The two positive counts that add up are shown in dashed lines in the drawing.

- 28 409841 / Ü327

The comparison carried out by the comparator 33 is symbolized by the arrow f ^. At this moment, in which the values of the two input signals of the comparator 33 are the same, arises at the output signal of the Comparator has an edge 55 * that triggers the ignition causes.

All implementation options for segments 5 »6, 7 and 8 of the curve in FIG. 1 have now been described been. It is clear, however, that the same implementation principle applies to a straight line segment with negative Slope and negative ordinate passage can be used or in the case of a straight line segment that contains the ordinate intersects at the zero point. However, this type of ignition curve can also be generated in a very simple way, by setting a constant time period behind the edge 15 corresponding to the top dead center (in analogy with the arrow in FIG. 7) and a constant angle (by analogy with the arrow in FIG. 5),

The counter 29 forms the algebraic sum of the positive or negative counted pulses. In order to make this possible, several clock signal generators of the same frequency must be used, their signals shifted against each other are. Based on a classic clock generator 56, which generates pulses of the frequency F-I = I MHz, a clock frequency divider is used, which is designated by 57 in its entirety. The scheme of the clock frequency divider s is shown in FIG. This figure it can be seen that the frequency divider 57 is formed by two flip-flops of the "JK" type, which are marked with 58 and 59 are designated. These two tilt stages are

- 29 409841 / Ü327

24U833

interconnected in the manner shown. The outputs J, K, CP, Q and Q have the standardized designations given by the manufacturers. The flip-flops 58 and 59 are commercially available components with the commercial designation "SN 7473 ^M. The outputs Q and Q of the flip-flops 58 and 59, like the output 56 of the clock generator, are connected to three NAND gates 60, 61, 62 made of components with the designation ^W SM 7% 10 "exist. The outputs of these three gates form three synchronous clocks, the signals of which are each shifted by a third of a period. The period is three times the period of the clock 56. In FIG. 12, the line 63 of the pulse train generated by the clock 56 is shown. The lines 64 and 65 each designate the output signals at the outputs Q of the flip-flops 58 and 59, the lines 66, 67, 68 each designate the output signals of the gates 60, 61 and 62. It can be seen that the gates 60, 61 and 62 three Deliver clock signals with the same frequencies that are shifted from one another by a third of the period.

The device according to the invention is shown schematically in FIG Fig. 13 shown. In this picture are the ones before depicted on the basis of the simplified 'scheme of FIG. 6 shown assemblies, but contains the Drawing additional assemblies, which are explained in detail below. As noted earlier has the In Flg. 1 curve of the ignition timing shown the shape of individual straight line segments, which accordingly the zones of comfort are strung together. It is therefore advisable, as a function of the signals of the

- 30 41/0327

24H833

Sensor 9 to determine in which zone cfe * curve of Fig. 1 you are currently by looking at the parameters of that straight line segment which In the relevant speed zone the ignition advance curve forms. This task is performed by a speed discriminator 69.

The speed discriminator 69 is connected, on the one hand, to the output of the sensor 9, which supplies it with information about the rotational speed, and, on the other hand, to the outputs of the first counter 26. As will be explained in detail, the counter 26 contains a group of binary counting stages at its output, each of which is "weighted" according to a power of 2. The output of the first counter 26 indicates, by means of the values of its various output lines, at each instant the time span that has elapsed since the leading edge of the signal emitted by the sensor 9. each Kus transition state of the counter 26 corresponds to a period of time, and each period has a Geschwindigkei tsmarücierung the adjustment curve associated. It is seen that need in the curve of Fig. 1, the rotational speeds corresponding to the points 2, 3 and 4 correspond to have to be used. Then the binary states can be determined on the main counter, those of the counting of the counter ers 26 for the duration of the passage of the indentation 11 on the sensor 9 for the rotation speeds corresponding to points 2, 3 and 4. This decoding of the three periods mentioned is carried out with universal gates that implement the punctures NAND and NOR as well as the function of the inverter

- 31 409841/0327

24U833

The sixteen outputs of the main counter 26, which are denoted by a, b, c, d ... m, η, ο, ρ, each have a "weight" of 2 ^l6 _i 2 ¹⁵ ... 2 ¹ , 2 ° . 14 shows schematically the circuit which makes it possible, with the aid of the universal gates mentioned, starting from the outputs of the main counter 26, three time periods PoB, PoA, PoR corresponding to points 4, 3 and 2 of the Pig. I and decode according to predetermined time periods of 2252 microseconds, 4504 microseconds, and 8333 microseconds. These predetermined periods of time correspond to rotation speeds of 3 * 700 rpm, 1,850 rpm, 1,000 rpm, respectively. The signals PoA, PoB, PoR and their complements PoA, PoB and PoR are then fed to a storage circuit which is shown schematically in FIG. When the signals of the circuit in FIG. 14 have been obtained for predetermined periods of time from the beginning of each signal 14, a comparison between the position of the leading edge of these signals and the position of the leading edge of the signal 14 is made. In this way one can determine in which range of the rotational speed one is in each case, and the circuit according to FIG. 15 generates four signals at the outputs 305, 306, 307 and 308, each of which is generated when in each case in one of the the zone corresponding to segments 5, 6, 7 and 8 is being worked. The circuit according to FIG. 15 contains four flip-flops "JK", which are designated by 70, 71, 72 and 73 and which are the same as flip-flops 58 and 59. In the drawing, the standardized designations for flip-flops are entered at the inputs. The inputs J are each controlled via NOR gates 70a, 71a, 72a, 73a, which the

- 32 4098A1 / Ü327

24U833

Output signals PoA, PoB, PoR of those shown in FIG Circuit or the complements of said output signals received. The inputs CP are connected to the Sensor 9 is connected and the inputs K are connected to the output of the designated 70b, 71b, 72b and 73b, respectively NAND gates connected. The discriminator 69 generates a signal at one of its outputs 305 * 306, 307, 308, each indicating that the speed of rotation is in the zone corresponding to segments 5 »6, 7 or 8 lies.

It has already been pointed out that in order to realize some segments of the curve according to FIG. 1, either the positive or the negative count of the second counter 29 must be blocked during a time A = k / 6 (k is the slope of the segment in question). In one case, the blocking must be carried out during a time P-AO = RO, where P is the duration of the signal 14. It is now expedient to generate corresponding signals with these time periods. This is the purpose of the duration decoder "Jh, which is designed according to FIG. 16. The duration decoder I ^ contains three assemblies, the inputs of which are connected to different counting stages of the output of the main counter 26. While retaining the designations a, b ... η, ο, ρ for the outputs of the counter 26, as indicated above, the circuits are shown in FIG. 16 with which at the end of the times 370 microseconds, 630 microseconds and 3333 microseconds, each of the time RO corresponding to segment 5, the Time AO corresponding to segment 6 and the time AO corresponding to segment 7, a signal edge is generated.

- 33 409841/0327

24U833

It is clear that that of the sex discriminator 69 and generated by the duration decoder 74 Signals have to be evaluated during the duration of a signal 14. It follows that one can see the outputs of this must reset both elements to zero at the same time, in which the main counter 26 also to zero is postponed.

The main counter 26 corresponds to the circuit shown schematically in FIG. The input of the counter will on the one hand by one generated by the clock frequency part 57 Clock signal 57a and, on the other hand, driven by the output signal of the sensor 9. These two controls take place on a NAND gate 74. The main counter counts according to a natural binary code de time units which it receives from the clock signal 57a. With the one described In the example, the counter contains 16 bits, the outputs of which are labeled a, b ... m, η, ο, ρ, as above was explained. Fig. 17 shows the structure of the circuit which constitutes the main counter. At every exit of the counter is a flip-flop of the type "flip-flop D" connected. The signals that are received at the outputs of this counter are, for example, for the outputs ρ, ο and η through lines 75 »76 and 77 of the 18, in which the line 78 represents the signal train of the clock signal 57a. Each tilting stage 8l consists of a component with the trade name "SN 7474". The main counter also has an input 79 »at which a reset to zero is possible (see Fig. 13) · This input is taken from the complementary signal to the signal 14 of the sensor 9, which is generated by the interposition of an inverter 80.

- 34 -40Ö841 / 0327

24U833

It has already been pointed out that in the circuit according to FIG. 6 a frequency divider 30 must be provided which, when it receives pulses of frequency F, emits pulses of frequency F / n, where η is equal to the ratio of two angles. The frequency divider 30 is connected to the outputs of the counter 26 and transforms the previously mentioned output signals a, b ... ο, ρ into corresponding output signals a ^f , b ¹ , ... o ^! , P ^f, which are shown in Fig. 18 by the lines 82, 83 3 84. These lines each form the transformed output signals p ¹ , o ¹ , n ¹ , which correspond to the output signals p, o, η denoted by 75 * 76, 77. Each transformed output signal is a signal whose leading edge coincides with the leading edge of an initial signal and whose duration is equal to the period of the clock signal 57a represented by line 78. During a given time, the output signal that corresponds to the combination of the signal o ^! and the clock signal according to line 78 in an AND gate corresponds to a signal which extends over such a number of clock time units which is equal to the number of clock time units of the same combination between the clock signal and the output signal p ^T divided by two . In other words, an output is transformed to the following one, in this way, by combining it with the clock

.by

signal 57a obtain a division of the signal frequency / two. The lines 85 and 86 show the passage of the combination through a logical AND of the clock 57a and the output signal p ^! (Line 85) to the same combination of the clock signal and the output signal o '(line 86). Fig. 19 shows the circuit for the trans-

- 35 409841/0327

formation of the output signals a, b, ... ο. ρ of the counter 26 in signals a ^! , b ', ... o ¹ , p ¹ , which can be used for the frequency divider. 20 shows a circuit for processing the transformed output signals a ', b', ... o ', p "to carry out a count at the frequency F / n, where η is equal to x / o one 9- = 50 ° and L = 39.8 °. One sees that c ^: -

(1/2 + 1/4 + 1/32 + 1/64) is. The approximation obtained in this way takes place to 0.043 ° and proves to be completely sufficient. It is clear that the greater the number of outputs of the main counter 26, the better the approximation. So one assigns 8 to an OR gate? the outputs ρ ', ο' »1 ^! and k ¹ , which correspond to the weights 1/2, 1/4, 1/32 and 1/64 necessary to obtain C, respectively. The output of the gate 8j controls an AND gate 88, which also has the clock signal 57b, which is obtained from one of the outputs of the clock frequency divider. The output of the gate 88 is connected to one input of an AND gate 89, at the other input of which the signal from the sensor 9 is present. The output of the gate 89 counts a number of pulses during the duration of the signal 14 in a rhythm F / n, where F is the frequency of the clock 57b and η is the sum of the expressions 2 ~. The values of i correspond to various output signals a ', b', ... o ¹ , p ^f which are present at the gate 87.

The counter 26 included in the general diagram of FIG. 6 performs the down counting and the up counting with the same number of bits as the main counter. He has two different fingers, one for them

- 36 409841/0327

positive counting of pulses and the other for that negative counting of pulses. He has a provision to zero and as many outputs as there are bits. This counter counts according to the same code up and down like the main counter. For the counting functions in both directions, the three are of that Clock signal frequency divider 57 supplied clock signals which correspond to the output signals 57a, 57b and 57c, out of phase with each other. Each of these clock signals is intended for a different count, because if at the same time periods of time must be counted that correspond to three different pieces of information, it is clear that the clock pulses must be shifted from one another, if no information is to be lost.

The positive or negative count of the counter 29 is controlled by a distributor 90, which is to be counted Pulses either one or the other input line of the counter 29 feeds. In one of the two Parts of the manifold 90 * shown in FIG is, the over the positive counting line 91 dem Counter 29 generated pulses to be fed, while in a second, shown in Fig. 22 part of the distributor 90 those signals are generated which are fed to the negative counting line 92 of the counter 29. The circuits shown in FIGS. 21 and 22 consist essentially of NAND gates.

Gate 93 in Fig. 21 leaves the duration signal (Ro) ^ if you are in the zone corresponding to segment 5. Likewise, the gate 9 ^ leaves that the duration (Ao), - corresponding signal through if

- 37 409841/0327

24H833

you are in the speed zone corresponding to segment 6. The gate 95 lets the signal (Ao) ₇ through when one is in the zone corresponding to the segment 7, and the gate 96 finally corresponds to the zone of the segment 8. A positive count of the signals of the frequency divider 30 must be for the zones of the segments 5 and 6 are suppressed. The gates 97 and 98 are, as already explained above, connected to the outputs of the divider 30 and their outputs are combined in the gates 99 and 100 with the signals 305 and 306. The information that must be counted positively is output via the output 9I, either with the frequency F of the clock 57a (which corresponds to the gate 101) or with the frequency F / n through the interposition of a frequency divider 30 (which corresponds to the gate 102). The frequency F is taken from the clock 57b. According to the choice of the outputs of the divider which is connected to the ports 97 and 98, as already mentioned above, η different numbers are obtained for dividing the frequency of the clock generator 57b.

In Fig. 22 that part of the distributor 90 corresponding to the negative count is shown. In reference to On the basis of what has been said above, it can be seen that the negative count is always based on the pulses received from the divider 30 is carried out. The negative count is on the one hand in the zone corresponding to segment 7 performed, which corresponds to gate I03, and on the other hand in the zone of segment 8, which corresponds to gate 104 is equivalent to. The gates I03 and 104 are connected to the divider 30 in the manner previously explained with reference to FIG. 20

- 38 409841/0327

24H833

and the choice of the outputs of the divider connected to these ports determines the value of the coefficient n, which is decisive for the effect of the divider. The outputs of the gates 103 and 104 are with the Inputs of the gate 105 connected, the output of which is connected to an input of the gate 106 again. Of the second input of this gate is connected to the clock 57b. This is how you bring the coefficient n, which was output by the divider by interposing the gates 103 and 104, to that of the clock generator 57b output frequency P, and the corresponding Counting signals are retained by gate 107 for the duration P of signal 14.

On the other hand, it has already been mentioned that one wants to install a vacuum adjustment, which corresponds to a step in the graph in FIG. 1, since it is independent of the speed of rotation of the motor. The negative pressure which controls the negative pressure adjustment is determined with a negative pressure pump 108 which contains a membrane 109. This pump is shown in FIGS. The membrane 109 is subject to the action of the vacuum and controls the movement of a rod 110 which moves a sliding contact 111, which on a a series of contacts 113 contained ^λ Tenden track 112 is slidable. Depending on the position of the sliding contact 111 on the track 112, a more or less large number of contacts 113 can be used in an electrical circuit, which are divided into four tracks and can correspond to different values, according to the value that is required for a specific position of the Arm 110 to adjust the pressure

- 39 409841/0327

want to adjust. The four outputs W, X, Y, Z of the four tracks of the track 112 are each with certain By connecting them to certain outputs of the divider 30. This combination will realized by the gates 114, 115, 116 and 117 (see Fig. 22) and this information group is from the gate summarized and causes according to the respective position of the rod 110 a division of the from the clock 57c by the factor n. This division takes place at gate 119 · The output signals the gates 106 and 119 are combined in the gate 120, and this supplies the signal 14 for the duration the negative count signals intended for the counter 29.

The detailed structure of the counter 29 is shown in FIG. The counter 29 contains sixteen output flip-flops which enable binary coding analogous to the coding selected for the main counter 26. The sixteen output flip-flops 121 are “D” type flip-flops like those used to implement the counter 26. Fig. 25 shows the circuit diagram of the multivibrators and the other electronic components used in the circuit of the counter. The sixteen outputs Q ₁ , Q ₂ , ... Q ₁ C * Q ₁ O of ^{the zänlers 2} 9 are connected to a memory 32 which stores the state of the counter 29 when the falling edge of the signal 14 passes and this information is stored until the next following signal 14 holds stored. The memory 32 consists of sixteen flip-flops of type D, which are designated by 22 in FIG. Each of the flip-flops is connected at its input D to one of the outputs Q ₁ , Q «,... QW- of the counter 29. The exits

- 40 A098A1 / Ü327

- 4ο -

24H833

of the memory 32 are ^{denoted by Q 1} ,, Q'p, ... Q ', g. The memory is divided back to zero by a signal generated by an inverter 123. The signal 14 of the sensor 9 is present at the input of the inverter. The resetting of the counter 29 to zero is also carried out by the signal of the inverter 123, but with the interposition of a delay element 124.

The comparator 33 is used to record the values in the memory 32 to compare stored information with the information generated by the main counter 26. That The signal stored in the memory 32 represents the coding of a signal given by the clock signal 57a Number of time units. These correspond to a duration for the transmission, starting from the increasing Edge of the following signal 14, is appropriate. This is the length of time calculated from the rising edge of the signal 14, it is sufficient to determine the output signal of the main counter 26 and the output signal of the Memory 32 bit for bit to compare and a signal change to be carried out from the moment in which the signal equality is determined. The signal comparison is with the circuit shown schematically in FIG carried out. In this scheme, the inputs corresponding to the outputs of memory 32 are marked with A

.with
draws and / B those inputs which correspond to the outputs of the main counter 26. The indices added to these letters indicate the number of bits concerned in the memory or in the main counter. The display A (or B) indicates the complementary value of signal A (or B). It can be seen that the circuit shown in Fig. 27 consists exclusively of uni

- 41 409841/0327

24U833

Versaltors with the functions NAND, NOR and "inverter" needed. The circuit consists of fifteen unit cells 125 which are identical to one another. this makes possible easily an extension of the bit number to a number greater than sixteen. The exit of the last cell 125 provides a signal that a plank is at the moment generated in the equality between the information stored in the memory 32 and that in the Counter 26 contained information is determined.

From the general scheme of the Pig. I ^ you can see that an additional element 126 is provided, for which the term combiner is used in the following. In the special case described, a device for triggering an ignition process in the cylinders of a piston engine, it is particularly interesting not only to fix the moment of ignition, i.e. the end of the power line in the primary circuit of the coil, but also the beginning of the conduction in the primary circuit of the coil as a function of the speed of rotation of the motor. The time of the current conduction in the primary circuit of the coil must differ from that between two ignitions depend on the time available, and the time of the power line must be determined in this way be that the power consumption is minimal.

In Fig. 28 the diagram of the primary circuit 127 of an ignition coil is shown, the secondary circuit with the Reference numeral 128 is designated. In series with the primary circuit is a resistor 129 and an additional one Resistance IjJO. By acting on the base of the transistor I3I one can add the additional resistance

- 42 409841/0327

130 connect in series with coil 127 or not. If the base of the translator 132 is acted on in a corresponding sense, the shutdown operation of the current in the primary winding is ended. In particular, when one is on segment 5 of the curve according to FIG. 1, it is possible to block transistor I3I and to control transistor I32 in such a way that the current conduction state is only brief. If, on the other hand, one is on segment 6 or segment 7 of FIG. 1, then transistor I3I must be kept blocked, while transistor I32 is controlled in such a way that a long current conduction period is obtained. During both cases mentioned, the additional resistor I30 is connected in series with the coil 127 in such a way that there is no risk of the transistor 132 being over-sensitive. For the corresponding zone in segment 8 of the curve according to FIG. 1, the transistor I3I is controlled into saturation and the transistor I32 is controlled in such a way that a long current conduction period results. In this way, a considerable ignition voltage is obtained even at high rotational speeds. This effect on the duration of the current conduction is achieved with the combiner 126 by one hand 133 ^an d the other hand, processes the output signal of the comparator of the sensor 9 and the Geschwindigkeitsdiskriminator 69 signals generated.

It is clear that the combiner 126 can be connected to the control of various auxiliary signals, for example, to control an electric petrol pump. The pump is supplied when the Motor runs below a speed threshold,

409841/0327

and when the starter is at rest. By means of the combiner 126 one can also see above a certain speed wave control the retraction of the automatic starter. The combiner 126 can also be used to create a throttle carburetor control or change the injection of fuel when the engine speed is above the throttle speed and the throttle valve is closed.

In Fig. 35 three ignition curves are shown, which one with the device according to the first variant of the invention can realize. The curve 250 is identical to that shown in FIG. and must be used when the engine's throttle is in is open. The curve 251 must be used when the engine's gas opening flap is closed and the engine is cold. The curve 252 is against it applied when the engine's gas throttle is closed and the engine is warm. To get from one of the 35 to transition to another ignition curve of FIG. 35, sees two external two-point sensors, one of which the opening or closing position of the throttle valve and the. other senses the temperature of the engine in relation to a predetermined temperature threshold. These two-point sensors are of a known type and are therefore not explained in detail at this point. The exemplary embodiment according to FIG. 35 is simplified in that segment 256 of curve 250 is at the origin has the same ordinate value as the horizontal step of curve 252 Segment 255 of curve 250 has the same intersection point

- 44 4098A1 / Ü327

the ordinate and the horizontal step of curve 25I. Finally, the three curves have 250, 25I and in the segment 255 a segment common to all stages. Everyone remains under these simplified conditions Parts of the above-described device according to the invention, which corresponds to FIGS. 1 to 27, are the same, with the exception of the manifold shown in FIGS. 21 and 22, which is modified. The positive counting part of the distributor, which has one of the three curves shown in FIG. 35 according to the signals from the external sensors is shown in FIG. 36, while the negative counting portion of the distributor is shown in FIG is.

In FIG. 36 are those elements of FIG. 21 that are also are used in the second embodiment are provided with the same reference numerals. The gate 9 ^ passes the signal corresponding to the time period (A) g when one is in the segment 256 of the curve 250 of FIG. 35 corresponding speed zone. The gate 95 lets the signal (A) through when you are in the speed zone corresponding to the segment 257 is located. The gate 96 corresponds to the zone of the step 258 and the gate 93a to the zone of the Segment 255 · A positive going out from the divider 30 Counting can also be suppressed for the zones of segments 255 and 256 in this example. the Gates 97 and 98 are, as in the description of the The first embodiment is indicated, connected to the outputs of the divider 30. The output signal of the Gate 97 is sent to a NAND gate 550 simultaneously with the clock signals 57b and the signals generated by the sensor 9.

- 45 409841/0327

24U833

th speed signals fed. Likewise, the output of gate 98 becomes the NAND gate 551 with the speed signal of the sensor 9 and the clock signal 59b summarized. The output signals the gates 95a and 550 are simultaneously with the signal at the output 305 of the discriminator 69 is fed to a NOR gate 552, while the output signals of the gates 551 and 94 are fed to a NOR gate 553 simultaneously with the clock signal 57a. The gates 95 and 96 control the inputs of gates 101a and 101, respectively 101b at the same time as the clock signal 57a. The output lines of the three ports are 553 * 101a and 101b summarized in the inputs of a NOR gate 554, the output of which drives a NAND gate 555, which lets the signal of gate 554 through in the event that the Input 556 is activated. This input is 556 connected to the sensor that responds to the position of the throttle valve and is energized when the The gas throttle valve is open. The output of gate 555 is connected to a NOR gate 557, at which Input also the output of gate 252 is switched. When the throttle valve is open, you can use the Output of gate 557 received the same signals such as those obtained with the circuit shown in FIG. This corresponds to curve 25O in Fig. 35 · If, on the other hand, the throttle valve is closed, the gate 555 is blocked and only the Sig-) corresponding to segment 255 * which is common to all three curves 250, 251, 252 nale.

The output of the gate 101b is with the input.eines

- 46 -409841/0327

24H833

NAND gate 558, both of its outer inputs each with the exit of gate 551 and with one Control line 559 are connected, which comes from a sensor responsive to the engine temperature. Further is a NAND gate 56O with one of the mentioned temperature sensors fed line 56I connected. When the engine temperature is below a certain threshold line 56I is asserted and when this threshold is exceeded line becomes line 559 driven, while line 56I no longer is controlled. The second input of the gate 56O is connected to the output of the gate 550. Depending on whether the engine is warm or cold is from the gates 56O and 558 either one or the other locked. The exits of these two gates are with the entrances a NOR gate 562 connected, the output of which the one Input of a NÄND gate 563 controls while the the other two inputs each with output 305 of the discriminator 69 and through a control line 564 is connected to the sensor monitoring the position of the gas throttle valve. When the gas throttle is closed, line 564 is activated, from which it follows that when the throttle valve is open, the gate 563 Is blocked. The gates 555 and 563, which alternate depending on the position of the throttle valve are blocked, their outputs are connected to a NOR gate 557, the output of which is the output of the positive Counting part of the distributor forms. Alternatively, if the gas throttle is closed, one obtains depending on the temperature of the engine at one of the gates 558 or 56O a signal. When the engine is cold is, the gate 56O is conductive and one receives the signal

- 47 409841/0327

24U833

le from the exit of gate 550. This corresponds to the stepped paragraph the curve 251, since the connection of the gate 97 with the frequency divider it enables an ordinate intersection of segment 255 to get the same is the ordinate intersection of the step shoulder of curve 251. If, on the other hand, the engine is cold, the gate is 558 conductive and the output signal comes from gate 551, i.e. corresponding to the realization of the stepped shoulder of curve 250, which has the same ordinate intersection like segment 256.

37 shows the negative counting part of the distributor corresponding to this variant of the invention. The scheme is the same as the scheme of FIG. 22 of the first embodiment. Therefore, for those components which exercise the same function as in the scheme of FIG. 22, the same reference numerals have been chosen.

The activation of the vacuum adjustment corresponds to, as already stated in the first exemplary embodiment was using gates 114, 115, H6, and 118, with the output of gate II8 being a NAND gate 119a is connected, at its inputs also a Clock signal 57c and a speed coming from the sensor 9 signal lie. The other branch of the negative count part shown in Fig. 37 corresponds to that for the zones of segments 257 and 258 of the curve 250 count derived from Fig. 35. The zone of the segment 257 corresponds to gates 401, 502 and 504. The Zone of segment 258 corresponds to gates 402, 503 and 505 · The one connected to the throttle valve ) The sensor acts on the NAND gates 570 and 506. That

- 48 4098A1 / Ü327

Gate 506 is activated when the gas throttle valve is open and gate 570 is activated when the throttle valve is closed - If the gas throttle valve is open, the NOR gate 507 receives signals that correspond to segments 257 and 258, and when the throttle is closed, gate 506 is locked, so that only information coming from gate 570 is passed through. Since the gate 120 is a NOR gate, On the other hand, it is always possible to make information effective, that of a vacuum adjustment correspond.

It can be seen that signals from external sensors are transmitted to the system at the level of the distributor or directly at the distributor can act. In the event that the different speed thresholds that lead to the different with the same device achievable Zühdkurven belong, are different, and in the event that the Ordinate intersections of the segments of the various Ignition curves are different, the information coming from the external sensors must be in the amount of Geschwxndigkextsdiskriminators 69 and / or the duration discriminator 7 ^ intervene. In the chosen In a special case, however, it is sufficient to have this complementary information in the amount of the distributor 90 to act bring to.

If you use a sensor to determine an acceleration

xjder
If the engine rotation slows down / slows down the system, you can create a curve for the ignition advance in the event that the engine accelerates, and another curve for the ignition advance.

- 49 409841/0327

24U833

ment in the event that the engine slows down. It is sufficient to use an acceleration and deceleration sensor which supplies a signal when a limit between an acceleration range and a deceleration range is exceeded. To deliver this signal, it is sufficient to compare the duration of two successive speed signals, ie to compare the number of clock signals that ^{were counted during the duration P of two successive speed signals of the FUhJa 1} S 9. This comparison can easily be carried out with the device shown schematically in FIG. In this scheme, elements 58O and 58I are flip-flops of type ^M JK "and element 582 is a flip-flop of type" D ". Element 583 is an up and down counting counter with ten-seven bits, the outputs of which are in groups of four in NAND- The units output is connected to an inverter 584. The outputs of all NAND gates are combined in a NAND gate 585 which controls the flip-flop 58I If the number of clock signals counted during a first speed signal is less than the number of clock signals counted down during the next speed signal, a signal of magnitude 1, which corresponds to a deceleration, is obtained at output 586 of the device, and in the opposite case, a signal of magnitude 0, which corresponds to acceleration, is obtained. The function of this sensor is not here described in detail because it is an additional device to the device according to the invention.

- 50 409841/0327

Claims (27)

24H833 Expectations .) Procedure for periodic control at least a function dependent on the speed of rotation of a shaft. which the controller with a phase shift with respect to the passage of a mark provided on the shaft at one fixed marker is triggered, the phase shift being a function of the speed of rotation of the shaft, characterized in that a signal is generated, the duration of which is the passage of a sector of rotation from the angle J in front of the fixed mark corresponds to the duration of this signal and then also the corresponding speed of rotation determined that one subtracts the value of that time between the Control and the beginning of said signal, and that this time vom.Beginn of the following signal counts down and triggers due to the control. 2. The method according to claim 1, characterized in that that the duration of the signal is determined by comparison with a reference time, e.g. supplied by a clock. 3. The method according to claim 2-, characterized that the comparison with the reference time by counting the number of time units the reference time is carried out by a first counter. - 51 409841/0327 4. The method according to any one of claims 1 to 3 »thereby characterized in that the period of time between the command to be executed and the beginning of the following signal, based on the duration of the previous signal is determined by a programmed numerical calculator that has a discriminator for various Contains speed zones of the rotating shaft, the curve of the phase shift as Function of the speed of rotation in each of these zones is formed by a curve segment. 5. The method according to claim 4, characterized g e mark chnet that the curve segment in each zone of the phase shift curve is a straight line segment is, and that the angle α of the rotating sector passing the fixed mark is constant is. 6. The method according to claim 2, characterized in that the counting of the period of time between the beginning of the following signal and the command to be implemented by comparing the Counter reading of the first counter during the following signal with the one saved during this time Value takes place, and that the command is triggered if between the counted value and the saved value Value equality exists. 7. Device for carrying out the method according to one of claims 1 to 6, in particular for carrying out the process the ignition advance of a piston engine in - 52 409841/0327 24U833 with respect to the top dead center of each piston white, characterized by the following assemblies: 1. a fixed sensor (9) j with one on the mile, whose speed of rotation is the one to be triggered Command determined, fortified sector cooperates, the sensor (9) during the As the sector passes, a speed signal of duration P is generated, 2. at least one device for generating a reference signal, e.g. a clock generator (56), 3. a first counter (26) for determining the duration of the speed signal and possibly for determining it the duration of the speed signal (14) after the starting edge (I5) as a function the unit duration of the reference time, 4. a second counter (29) for simultaneous positive and negative counting, which is his Counting pulses from a numerical computer (90) receives its information from the first Counter (26), from the time reference sources (57), from the speed signal (14), e.g. an ignition device / the centrifugal adjustment, and possibly a corresponding complementary signal obtained, which e.g. in the case of a device for controlling the ignition adjustment corresponds to the vacuum adjustment, the both counters (26, 29) each have a reset - 53 409841/0327 24H833 point to zero, 5 · a memory (32) for storing the to the Outputs of the second counter (90) pending information, with a command following the Storage of the information of the second counter (29) in the memory (32) when passing through the Leading edge (15) of the speed signal (14) caused before resetting the count of the second counter (29) to zero, while resetting the first counter (26) to zero when passing through the leading edge (15) of the speed signal or at a time thereafter, and wherein the information remains stored in the memory (32) until the leading edge (I5) of the next following speed signal (14) passes ty and 6. a comparator (33) for triggering the to be generated Commands, e.g. the opening of the primary circuit of an ignition coil, if the outputs of the memory (32) pending information with the information at the outputs of the first counter (26) pending information is the same. 8. Apparatus according to claim 7 »characterized in that the computer has a Discriminator (69) for the speed zones, the position of the trailing edge of the speed signal in relation to the position of the trailing edge, at least one signal is predetermined 409841/0327 _ ₅ 4 - 24U833 ter duration, the leading edge of which coincides with that of the speed signal (14), and that the duration of the predetermined signal corresponds to a rotation speed, which in particular is two can limit successive zones of the phase shift curve. 9. Apparatus according to claim 8 for performing the method according to claim 5 »characterized in that a zone (&) or the phase shift curve is designed as a segment whose ordinate intersection ((7) is unequal Zero is that the computer controls a frequency divider (30) based on a pulse frequency F generates pulses of frequency F / n, where η is the sum of a finite series' of the general Expression is 2 ~, and where the number of terms in the series is equal to the number of stages which make up the frequency divider (30). 10. Apparatus according to claim 9 * thereby g e mark calculates that with a step of the ordinate & the number η essentially borrowed equal to *! f / 0, and that during the entire duration P of the speed signal (14) the second counter (29) the pulses F supplied by a time reference source is positive and the pulses of the frequency F / supplied to it by the frequency divider (30) n counts negative. 11. The device according to claim 8 for performing the method according to claim 5 * thereby g e - - 55 -409841/0327 indicates that in a zone in which the phase shift curve has a segment with positive Slope is that either goes through the origin or nlehifc, the calculator has a duration decoder (? 4) controls the one with the outputs of the first Counter (26) is connected and generates a signal in each period of the speed signal (14), which consists of a pulse whose duration A for each zone of interest is predetermined. 12. The device according to claim 11, characterized that in the case of a segment going through the origin with the positive Slope k = t> / H, where c in degrees and N in rev / nsin Expressed 1st, the duration is A = k / 6, and since <3 during the duration of the speed signal (14) the second counter (29) is blocked during tent A from the beginning of the Geschwlndlgkeltssignals (14) and then from a time reference source incoming pulses of frequency F counts. 13. Device according to claims 9 and 11, characterized in that a zone or the phase shift curve is a segment with a positive slope and an ordinate origin _o is that the computer the frequency divider (30) and the duration decoder (74) at the same time observes that the second Counter (29) depending on whether C is positive or negative, during the duration of the speed signal the pulses of frequency F / n fed to it by the frequency divider (30) are positive or negative - 56 & 098 & 1/0327 counts negatively, where η is essentially the same, and that the second counter (29) at the same time after the time A, during which it remains blocked, counts the pulses of frequency F fed to it by a time reference source as positive, and that A in seconds im is essentially equal to <9 / 6N and & are expressed in degrees and N in rpm. 14. Device according to claims 9 and 11, characterized in that in a zone or in the phase shift curve a segment with a negative slope and a positive ordinate intersection 6-, there is that the computer has the frequency divider (30) and the duration decoder ■ (74) simultaneously turns on that the second counter (29), during a time R _Q , which is essentially equal to (5 / 6N), counts the pulses of the frequency F fed to it by a time reference source positively, where & in degrees and N in RPM is expressed, and that the second counter simultaneously during the entire duration of the speed signal counts the pulses of the frequency F -— positive fed to it by the frequency divider (30), where η is essentially equal to .VJ ₁ . 15. Device according to one of claims 8 to 14, d a through characterized in that the second counter (29) is controlled separately by a distributor (90) for positive and negative counting. 16. The device according to claim I3, characterized - 57 409841/032? 24H833 indicates that the distributor (90) is divided into two independent parts, wherein each of the two parts is connected to the following assemblies: to a speed discriminator (69), a frequency divider (30), a ■ speed sensor (9), two time reference sources, one of which is preferably common to both parts mentioned, possibly with the outcome of a gene • rators, which generates a complementary signal which, for example, in the case of a device for adjusting the ignition of a Vacuum adjustment, where the first, part determined for the positive count with the duration decoder (7 * 0 is connected and the second part is intended for negative counting. 17. The device according to claim 16, characterized in that the distributor (90) is supplied with three time bases (57a, 57b, 57c) derived from the same clock generator of the basic frequency F, via a clock frequency divider (57), the respective signals of the frequency F. ₁ / ^, which are offset from one another by a third of the period. 18. Device according to one of claims 7 to 17 *, characterized in that the Velocity sensor (9) a magnetically operating one Proximity sensor is on an indentation or a projection of the sector angle ^ on the Wave responds. 19 · Device according to claim l8 for determining the ignition - 58 409841/032? 24U833 adjustable for a piston engine, thereby 'characterized in that the shaft to be scanned is the steering wheel of a crankshaft or a Koekenwelle the motor is. 20. Device according to one of claims 7 to I9, characterized in that the second counter (29) contains P binary outputs, each of which is connected to a multivibrator, and that another input of the flip-flops / preferably with the interposition of a signal inverter, the memory (32) is connected, which has a multivibrator output having. 21. The device according to claim 20, characterized in that that the comparator consists on the one hand of a NOR gate connected to the first output of the memory (32) and the first counter (26) and on the other hand with p-1 .identical memory cells connected, of which the input of one is connected to the output of the previous one, each memory cell having an output of the memory (32) and the associated output of the first Counter (26) is connected and preferably contains four NAND elements. 22. Device according to one of claims 8 to 21 for determining the ignition timing in a piston engine, characterized in that a combiner connected to the position sensor (9), the discriminator (69) and the comparator (33) (126) the duration of the speed signal - 59 - 409841/032? 24U833 (14) with a predetermined one obtained from the discriminator Compares pulse duration and, based on this comparison, determines the time during which the Primary circuit of an ignition coil remains open and closed for a period. 23. Device according to one of claims 7 to 22, characterized in that the The generator of the complementary signal consists of a manometer capsule (108) whose membrane . Exercise of a grinder (111) controls which grinds on a group of conductive tracks, each of which may or may not be controlled according to the position of the grinder, that each track (113) with a Is connected to the input of the distributor (90) and is there, for example, at the input of a NAND gate, whose other input is connected to an input of the frequency divider (30), and that the selection of the so connected outputs of the frequency divider is made according to the valency that each S pure (13). 24. The device according to claim I3, characterized that the discriminator (69) and / or the decoder (74) and / or the frequency divider Receive signals that come from at least one two-point sensor, which at least detects a functional parameter of the connected motor or the device, and that these signals the signals of a predetermined length of time relative to which the positive or negative count of the Clock generator or the clock frequency divider originating - 60 409841/0327 - 6ο - Impulse takes place, change. 25 · Device according to claim 24, characterized that the (or the) two-point sensor by the position of a gas throttle valve and / or by the temperature of the engine and / or by accelerating or decelerating the engine is (or are) controlled. 26. The device according to claim 25 »characterized in that that the sensor for acceleration or deceleration of the motor contains an up and down counter, which a signal generated depending on whether the number of pulses of the clock generator during the duration of a speed signal is greater than or possibly equal to the number of pulses of the clock generator during the duration of the following speed signal. 27. The device according to claim 5, characterized in that that the discriminator (69), the decoder (74) and the frequency divider consist at least partially of a dead memory connected to an addresser, the information from the main counter and from any two-point sensors provided, and that the dead memory as Function of the input configuration generates a binary word whose elements, preferably with the interposition a buffer memory, the comparator (33) and the frequency divider. 409841/0327 Blank page