DE1901001A1 - Method and device for limiting the speed of motor vehicles with an internal combustion engine when a predetermined critical speed is reached - Google Patents

Description

1 9 O 1 O (J.

Patent attorneys Dipl-Ing. EWeickmann,

Dipl.-Ing. H.Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

8 Munich 27, January 7, 1969

MÖHLSTRASSE 22, CALL NUMBER 483921/22

Ducellier et Oie., 23, Hue Alexandre-Dumas, 75-Pariah XIe, France

Method and device for limiting the speed f of motor vehicles with an internal combustion engine when a predetermined critical speed is reached

The invention relates to a method and an apparatus for limiting the speed of a motor vehicle j especially to limit the output power of a with an internal combustion engine equipped with an ignition system.

±! S are methods and devices for limiting the speed of an internal combustion engine known above a critical value, after which the secondary winding the ignition coil supplied high voltage above the predetermined speed value is diverted to ground.

These methods and devices have the disadvantage of not being precise, since they are used to generate the ignition sparks The voltage required by the spark plug is variable depending on the pressure inside the cylinder, on the condition the spark plugs and atmospheric conditions in general.

The invention is based on the object mentioned ^. disadvantage avoid and create a device that

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shows no hysteresis, neither in the normal nor in the transition area, that is, the limit of the speed from which the ignition is wholly or partially suppressed is the same the limit of the speed at which the ignition starts again.

The invention therefore relates to a method for limiting the speed of a vehicle equipped with an ignition system Internal combustion engine, which consists in the fact that one or more consecutive or non-consecutive ignition sparks an ignition sequence of the engine above a limit speed of the vehicle are suppressed. This will reduce the output power of the engine, but not in range lower speeds, so that the vehicle has a very limited speed, since a reduced output power prevents further anatigen ^ p ^ speed.

A device for carrying out this method is characterized in that it consists of a monostable multivibrator with an adjustable time constant, which is from a certain limit value of the engine to an ignition control signal short-circuits and thus suppresses the ignition of the engine.

According to a further embodiment of the subject matter of the invention is a monostable multivibrator with a fixed time constant in front of the monostable multivibrator with an adjustable Time constant switched, which makes it possible to use a common signal generator for the ignition and the speed limit to use and thereby dease one of two ignition sparks of an ignition sequence of the engine above Suppress predetermined critical speed without the ignition signal at speeds below the limit speed is disturbed.

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The mono stable multivibrators have in particular NP ¥ - Transit engines.

In a further development of the subject matter of the invention, it closes a mono-stable short-term multivibrator from the predetermined one critical speed value of the engine to an ignition control signal briefly, while that of the multivibrator with felter and the pulses generated with an adjustable time constant are superimposed.

In Figs. 1 to 4 of the drawings, the subject matter is Invention illustrated using exemplary embodiments and explained in more detail below. Show it:

Pig «1 an electrical circuit diagram of a device for limiting the speed at which a Auxiliary signal generator above a predetermined critical Speed the entire ignition of the engine is suppressed;

2 shows an electrical circuit diagram of a device for limiting the speed in another embodiment, wherein part of the ignition of the engine is above a predetermined critical high wind speed k'-jio is suppressed;

Pig. 3 '- in an electrical circuit diagram of a device for limiting the speed at which a common ignition signal range is used i ._> t and at which an i> ij d'ii' ignition above a ^ r vot-b-iötiinnit- n krif..i ', ·'-; n GüöciiWind Lgkeit unt 3rd- ¹ UjIi τ becomes, and

Pig. A -jii, ·.:! ·. j-: tri ..: vJJvju ochaltbild a Voi'richtung to

Liigr - '^ nzen d! .-.!. ■ Contingency in a wide-i'en Aua-I ¹ U. i''Zrig..i'orr: i, üo: i dar νLn. Help; sSignalgeber use '-; i, i..t and byi which above a tx · oti uitten critically on speed di <^ ge.jaiutt: Ignition you, j Mo is suppressed.

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The two exemplary embodiments shown in diagrams 1 and 2 refer to an electromagnetic ignition system, which consists of a rotor 20 that is on the end the crankshaft is seated and which is provided with lugs that work together with a stator that has a signal generator 21 forms with permanent magnets, from which an electrical signal is picked up. The signal generator 21 is provided with a device 22 for controlling the ignition and its output is connected to an ignition coil 23 which controls the spark plugs via a not shown Distributor feeds.

The device according to the circuit diagram of FIG. 1 consists of an electronic circuit with a signal amplifier an NPN transistor 1, its base 1a via a diode 2 and a damping resistor 3 is connected to the positive connection terminal of an auxiliary signal generator 25. The latter is arranged in the ignition circuit in such a way that the ignition is not disturbed at any value of the speeds below a certain critical speed value lie.

The emitter 1b of the transistor 1 is simultaneous with the negative terminal of the signal generator 25 and the negative pole of the battery 26 connected.

A diode 4 is parallel to the auxiliary signal generator 25, whose Anode is connected to the negative pole of the battery 26.

A resistor 5 is connected between the base 1a and the emitter 1b of the transistor 1

A circle with an adjustable time constant has a potentiometer 6, which like its sliding contact with the positive Pole of the battery 26 and which is also connected to the base 7a of the NPN transistor 7 via a resistor 8.

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The circuit also has a capacitor 9 t between the base 7a of the transistor 7 and the junction of the resistors 10 and 11 is connected between the positive and the negative pole of the battery 26 are connected in series and thus form a voltage divider.

A resistor 12 connects the collector 7c of the transistor to the positive pole of the battery 26.

A series circuit made up of a resistor 13 and a diode is connected between the collector 7c of the transistor 7 and the base 1a of the transistor 1.

An NPN transistor 15 is connected to its base 15a through a resistor 16 with the collector 7c of the transistor 7 and with its emitter 15b with the negative pole of the battery 26 and with the collector 15o connected to the positive terminal of the main ignition signal generator 21.

The device described works as follows:

If the auxiliary signal generator 25 sends no signal, i.e. at speeds below the speed limit, the Transistors 1 and 15 blocked, transistor 7 is in the conductive and saturated state and capacitor 9 is up to charged to a potential that consists of the voltage divider duroh from the resistors 10 and 11 is determined. j

If the positive signal coming from the auxiliary signal generator to which BapIe 1a reaches the transistor 1 is dieuer conductive} effected DIEA, capacitor DAFL 9 through the resistor 10, the Potentiorn) gate 6 and dun resistor 8 discharged and the translator 7 gnijporrt is, while olner ZoIt, dlo depends on dor iintlade- »<iit isn, Kond« ri »atoru 9,

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The feedback circuit, which consists of the resistor 13 and the diode 14, maintains the saturation of the transistor 1 and thereby enables the capacitor δ 9 to be completely discharged.

The transistor 7 is blocked and the transistor 15 is conductive during a period determined by the HC circuit which consists of the resistor 10, the potentiometer 6, the resistor 8 and the capacitor 9.

The collector 15o of the transistor 15 is therefore during this Period of time connected to the positive terminal of the main signal generator 21, which controls the ignition} as long as the transistor 15 is conductive, no ijignal appears.

If the period of time during which the transistor 15 is conductive, and which is precisely determined by the HC-Krels, is equal to that Period between the input signal sent by the auxiliary signal generator 25 goes out, and the signal is that controls the ignition spark of the next ignition, this period at the aforementioned Limit speed is measured, no spark occurs for speeds above the predetermined limit speed.

The ignition is therefore suppressed as long as the speed is higher than the predetermined limit speed.

The execution according to the circuit diagram of the Pig. 2 differs differs significantly from that according to Pig. 1. You enter one monobstable multivibrator with foster Zeitkonutantu, the particular ü an NPN-Transiator 1υ and the eLnem monoutable Multivibrator with adjustable time cone the transistor 7 contains, vorgüüohalttit; iut.

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This embodiment is characterized by the use of a common signal generator off simultaneously for the ignition and the speed limit; it also allows one Ignition spark above a predetermined critical speed of two is suppressed. In this case the positive one Terminal of the common signal generator 21 simultaneously with the collector 15c of the transistor 15 and the base 1a of the transistor 1 via the resistor 3 and the diode 2 are connected.

The collector 16c of this transistor 16 is connected via a resistor 18 to the positive pole of the battery 26 and also to the capacitor 9 and the feedback circuit, which consists of the resistor 13 and the diode 14. The emitter 16b of the transistor 16 is connected to deSffoi ^{1Ven of} the battery 26, its base 16a, however, via a resistor 19 to the positive pole of the battery and via the capacitor 17 to the junction of the resistors 10 and 11, i.e. to the collector 1c.

The device described works as follows: If there is no signal from the common signal generator 21, the transistors 1 and 15 are blocked and the transistors 7 and 16 are conductive, the capacitor 17 is at the potential charged, which is determined by the voltage divider from the resistors 10 land 11 and the voltage across the resistor 19 will.

When the signal emanating from the common signal generator 21 reaches the base 1a of the transistor 1, this becomes conductive, the capacitor 17 discharges 3ich, whereby the transistor 16 is blocked during a period determined by the IiC circuit is determined from the capacitor 17 and the resistors 10 and 19 hut: divides.

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During the period in which the transistor 16 is blocked, the capacitor 9 charges to a potential that through its voltage divider is determined from resistors 18 and 13 " will.

When the capacitor 17 is discharged, the transistor 16 becomes conductive again, and the capacitor 9 is discharged via the Resistor 18, potentiometer 6 and resistor 8, whereby transistor 7 is blocked and transistor 15 is conductive will. .

The same poles result from this way of working as in the previous embodiment.

The sum of the puncture times, i.e. the dwell times in the unstable The state of the two monostable multivibrators with transistors 7 and 16 is the same as the period of time between two successive sparks of the ignition measured at the predetermined critical speed results. The puncture time of the monostable multivibrator with the transistor 16 must be sufficiently large to at all speeds below the predetermined critical speed to avoid ignition malfunctions.

The device according to the circuit diagram of the Pig. 3 exists in particular from an input circuit, a monostable multivibrator with a fixed time constant, a monostable multivibrator with

half a low time constant and a monostable / multivibrator with a large time constant that controls a short-circuit transistor.

The input circuit consists on the one hand of a diode 27 and a resistor 28, which are connected in parallel and connected to the auxiliary signal generator 25, and on the other hand »us one

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Attenuation resistor 29 »the one with the positive connection terminal of the auxiliary signal transducer is connected.

The multivibrator with a fixed time constant consists of the NPN transistors 30 and 31, resistors 32 to 36 and two capacitors 37 and 38.

The transmitters of the transistors 30 and 31 are at the same time as the negative terminals of the signal generators 21 and 25 and _A.

26 ■

connected to the negative pole of the battery /. The base of the transistor 30 is connected to the positive terminal of the auxiliary signal generator 25, the base of the transistor 31 is connected to the collector of the transistor 30 via the capacitor 37 is.

The capacitor 38 is between the base and the collector of transistor 30 switched. The resistors 32 and 33, which are connected in series and which form a voltage divider » lie across the poles of battery 26, their connection point is with the collector of transistor 30 and across the capacitor 57 connected to the base of transistor 30.

The collector of the translator 31 is with the connection point of the Tension part resistance 34 and 36 and its base with the pot *. : Aitiven pole of the battery connected via the resistor 35.

The monostable multivibrator with adjustable time constant consists of the two transistors 39 and 40, the resistors 41 and 45, a potentiometer 46 and two capacitors 47 and 48

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* otentio "üt" r 46, d * u with de "Itoadenaator 46 and de" Wider-43 4fn Ir "i" Alt © inat "formable 2 * itkont3t * iata, iat

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8AD ORIGINAL

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with the positive pole of the battery 26 as well as its LJclileifkontakt and to the base of the NPii transistor 39 via the Resistor 43 connected.

The capacitor 47 iat between the base of the transistor ...: 39 and the connection point of the L series and one Voltage divider forming resistors 41 and 42 connected. The connection point is via the capacitor 49 with the collector of transistor 31 connected.

The resistor 44 connects the collector of the transistor 39 to the positive pole of the battery 26.

The base of the NPN transistor 40 is through the resistor 45 with the collector of the transistor 39> its emitter with the negative pole of the battery 26 and its collector via the capacitor 47 connected to the base of transistor 39.

A rectifier circuit is formed by the rectifier diodes 50, 51, 52 and the resistors 53 and 54, which are connected between the poles of the battery 26 and the diode 50 in berie .

The diode circuit further contains a capacitor 55, the is parallel to resistor 54 "

The two diodes 51 and 52 are jointly connected to the connection point of the resistor 53 and the diode 50 and also to the collectors of the transistors 39 and 31, respectively.

The monostable multivibrator »with a small time kenatant There are also two NPN Iranian gates 56 and 57 ». . * ·· »Resistances:> B

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to 63 and the capacitor 64 »

The base of transistor 56 is connected to the junction point of the Diode 50 and resistor 54 connected; the emitter is simultaneously with the negative pole of the signal generator 21 and 25 and the negative pole of the battery 26 connected.

The resistors 58 and 59, like the resistors 62 and 63, form a voltage divider. They are connected in series and lie across the poles of battery 26. Its connection point is on the one hand with the base of transistor 57 'on the other hand via the Capacitor b4 connected to the base of transistor 57.

The base of the transistor 57 is connected to the positive pole of the battery 26 via the resistor 61.

The resistor 60 is on the one hand with the collector of the transistor 57 and on the other hand with the base of the transistor 56 at the junction of the diode 50 and the resistor 54 are interconnected.

The half monostable multivibrator with a large time constant contains a capacitor u5, resistors 66 and 67 as well a transistor 68.

The base of the transistor 68 is on the one hand via the resistor 06 is connected to the positive pole of the battery 26 and, on the other hand, to the collector of the transistor 57 via the capacitor 65.

The resistor 67 connects the collector of the transistor 68 to the positive pole of the battery 26, the emitter of the transistor 68 is connected to the negative pole of the battery 26.

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The device "also has a short circuit, the consists of a transistor 69, the base of which is connected to the collector of the transistor 68 via a resistor 70 and whose emitter is connected to the negative pole of the battery 26 via safety diode 71. The collector of the Transistor 69 is connected to a resistor 75 and this via a capacitor 72 and a diode 71 to the negative pole the battery 26 and also connected to the positive terminal of the main signal generator 21 of the ignition.

An interference suppression circuit consists of two capacitors 73 and 74 » which are connected in parallel across the poles of the battery.

The device described operates as follows: Below the predetermined critical speed of the engine the monostable multivibrator with a fixed time constant and the one with an adjustable time constant work normally. There If the multivibrators are never simultaneously in the unstable state, the transistor 69 always remains blocked.

In the predetermined range, the pulses from the two multivibrators are superimposed and the short-circuit transistor 69 closes the main signal generator 21 briefly; this short circuit lasts until the moment when the signal from the auxiliary signal generator 25 occurs.

The device then works as follows: The negative pulses from the auxiliary interceptor 23 are caused by the Diode 27 suppressed.

The amplitude of the positive pulses are limited by resistors 28 and 29. When the positive impulses a If the size is sufficient, loosen the monostable multivibrator with a fixed time constant, which tilts into its unstable state.

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As soon as the monostable multivibrator with a fixed time constant returns to the atable state, it causes the monostable Multivibrator with adjustable time constant falls into its unstable state; the duration of this state becomes determined by the potentiometer 46.

iltung determines the status of the first two

which, when in the unstable state at the same time, allow transistor 56 to conduct. Of the monostable multivibrator rait a small time constant, which consists in particular of the {transistors 56 and 57, generates a Short duration pulse sufficient to charge capacitor 65.

As soon as the transistor 57 conducts again, the capacitor discharges 65 and blocks the transistor 68, which allows the transistor 69 to conduct, which then shorts the ignition signal generator 21.

The transistor 69 is at speeds above the predetermined critical speed conducting, with the exception of the charging of the capacitor 651 which starts as soon as the auxiliary catcher 25 sends out a signal.

This is the Orund, which is why the main signal generator 21 and the pulses emitted by the auxiliary signal generator 25 are not in Phase, but must be shifted by a certain angle.

The ignition is therefore suppressed when the speed • exceeds a predetermined limit value.

SI execution according to the circuit diagram dor I ¹ Ig * 4 unturjoheidot uich in contrast to the near the circuit diagram in Fig.

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in that a common signal generator 21 for the same time The ignition and speed limit is used and it allows one spark of two above the predetermined critical speed is suppressed. In this case, the positive terminal becomes the common Signal generator 21 simultaneously with the collector of the transistor "68 and via the resistor 29 with the base de ^ transistor 30 connected.

The mode of operation of this embodiment is analogous to that of the preceding ones.

Of course, the embodiments described can be subjected to numerous changes without the sideline the invention would be abandoned. For example, a chopping ignition, photoelectric cells, the Hall effect, etc. Find use.

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Claims (4)

- 15 claims 1. Verfallron for limiting the speed of motor vehicles, in particular to limit the output power of an internal combustion engine equipped with an ignition system, characterized in that one or more consecutive or non-consecutive ignition sparks of an ignition sequence of the engine above a limit speed the vehicle will be suppressed, ™ 2. Device for performing the method according to claim 1, characterized "by a monostable multivibrator (7> 39 »40) with an adjustable time constant that starts from a certain limit value of the engine« to an ignition control signal short-circuits and thus suppresses the ignition of the engine. 3. Apparatus according to claim 1, characterized by one of the monostable multivibrator (7, 39, 40) with adjustable Time constant upstream monostable multivibrator (16, 30, 31) with a fixed time constant and a common Jignalg .--- over (21) for the ignition and the speed | limitation, whereby one of two ignition sparks of an ignition sequence of the engine above the predetermined critical Limit speed can be suppressed. 4. Vox'i'ichtung according to claim 3, characterized in that a short circuit monostable multivibrator (68) from the predetermined one critical limit value of the engine short-circuits to an ignition signal, while that of the multivibrator with fixed pulses and those generated with an adjustable time constant; i superimpose " 009851/0816