US3652832A - Arrangement for controlling processes which are dependent upon the angular position of a rotating member - Google Patents

Arrangement for controlling processes which are dependent upon the angular position of a rotating member Download PDF

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Publication number
US3652832A
US3652832A US14513A US3652832DA US3652832A US 3652832 A US3652832 A US 3652832A US 14513 A US14513 A US 14513A US 3652832D A US3652832D A US 3652832DA US 3652832 A US3652832 A US 3652832A
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United States
Prior art keywords
pulses
counting
rotating element
auxiliary
sensing
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Expired - Lifetime
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US14513A
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English (en)
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Gunther Baumann
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/061—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle pick-up devices without mechanical contacts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24404—Interpolation using high frequency signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the speed of a motor may, in practice, vary in a ratio of l 50, the time that the monostable multivibrator remains in the unstable state must be variable in a ratio of 50 1, even if variations in the time interval depending upon operating parameters of the engine are not considered.
  • the conventional arrangement must therefore operate within very precise tolerances. It further requires substantial amounts of additional equipment in order to vary the time of the control signal generation in dependence upon other operating parameters of the motor.
  • the control arrangement comprises auxiliary pulse generating means associated with said rotating element and adapted to furnish a predetermined number of auxiliary pulses during each rotation of said rotating element. It further comprises counting means for counting said auxiliary pulses and furnishing a control signal when the number of counted auxiliary pulses is equal to a preset number.
  • the presettin'g of the counting means to a preset number may be achieved by means of an oscillator which furnishes set pulses.
  • the counting means comprise a first and second counter.
  • the first counter receives the auxiliary counting pulses, while the second counter receives the set pulses. As soon as both counters have the same number entered during each rotation, the control signal is generated.
  • the counting means may comprise a forward-reverse counter.
  • the set pulses may be applied to the forward counting input, while the auxiliary pulses are applied to the reverse counting input of such a forward-reverse counter.
  • the control signal is generated whenever the counter is in the zero condition.
  • the set and auxiliary pulses may be applied at least in part simultaneously to, respectively, the forward and reverse counting inputs.
  • the rotating element may be mechanically connected to a disk which has markings either around its circumference or on its upper surface. These markings may be either electrical or mechanical and are sensed by sensing means.
  • the disk may have additional markings for furnishing start and release pulses whose function will be explained below.
  • the rotating disk may have markings on only a part of its circumference, and the beginning and the end of such markings, may be used to furnish the above-mentioned start and release pulses.
  • sensing means for sensing the start pulses are not required and the beginning of the counting of the auxiliary pulses is determined by the beginning of these pulses themselves.
  • the reverse counting input of the counter may be connected to the auxiliary pulse generating means by means of second gating means, while the forward counting input of the counter is connected to the oscillator furnishing the set pulses by means of first gating means.
  • the first and second gating means are rendered conductive in dependence upon the release and start pulse respectively.
  • FIG. 1 shows a block diagram of an embodiment of the present invention using two gating means
  • FIG. 2 is a block diagram of a simplified embodiment, using only a single gating means.
  • a disk 10 which rotates at an angular velocity to.
  • the disk has markings along its circumference which, when sensed by sensing means 11, furnish the auxiliary pulses.
  • the disk has further markings 12a and 12b for generating the start and release pulse, which will be further discussed below, respectively.
  • marking 12b is at a different radial distance from the center of disk 10 as is the marking 12a.
  • sensing means 11 separate sensing means are provided for sensing each of said markings.
  • the markings around the circumference, which furnish the auxiliary pulses after sensing by sensing means 11, are then applied to pulse-shaping means 13 which shape them for use in subsequent circuitry.
  • the output of the pulse-shaping means 13 is connected with the input of second gating means 14.
  • the output of the second gating means 14 is connected to the reverse counting input of forward-reverse counting means 15.
  • the forward-reverse counting means here a counter 15, has an output 16, on which a control signal appears when the counter is in its zero position.
  • the forward counting input of the counter 15 is connected to the output of the first gating means, gate 17, whose input is connected to the output of oscillating means, namely an oscillator 18.
  • Monostable circuit means namely a monostable multivibrator 19, controls the conductivity of the first gating means.
  • the monostable multivibrator 19 is switched to its unstable state by means of release pulses furnished by sensing means 11 in response to a marking 12b.
  • the arrows labeled 20 indicate that the amount of time the monostable multivibrator 19 remains in the unstable state, is dependent upon a number of operating parameters of the system of which the present control arrangement is a part.
  • the second gating means, namely gate 14, is controlled by means of bistable circuit means, here a flip-flop 21.
  • Flipflop 21 receives start pulses for switching it to a set position and the control signal, namely the output of counter 15 available at terminal 16, for resetting purposes.
  • FIG. 1 The arrangement shown in FIG. 1 operates as follows:
  • auxiliary pulses are generated continuously. Further, during each rotation, one start pulse and one release pulse is generated. It will be assumed that counter 15 is in its zero position at the beginning of operation and that the sensing means 11 generate a release pulse in response to a marking 12b which switches the monostable multivibrator 19 to the unstable state. In this state, gate 17 becomes conductive and allows pulses from oscillator 18 to be applied to the forward counting input of counter 15. The pulses furnished by oscillator 18 are herein referred to as set pulses. The number of pulses which reach counter 15 from oscillator 18 depends upon the length of time the monostable multivibrator 19 is in the unstable state.
  • the count entered into counter 15 remains in the counter until a start pulse is furnished when marking 12a passes the sensing means coordinated therewith.
  • This start pulse switches the flip-flop 21 to its set condition causing gate 14 to become conductive and permit passage of auxiliary pulses from pulse shaper 13 to the forward counting input of counter 15.
  • the count in counter 15 is thus decreased until the zero position is reached.
  • the control signal appears at output 16.
  • This control signal is used for controlling a process within the system, as for example controlling the start of a fuel injection in a motor vehicle. Alternatively, it may control the ignition in an internal combustion engine. Many other possibilities exist. The preceding two examples were examples only.
  • the control signal is further used to reset flip-flop 21, thus closing gate 14.
  • the position of the start marking 12a when a start pulse is generated by the sensing means, may constitute a reference position of the disk.
  • the angle or position of the disks may then be referred to this reference position.
  • a rotational angle of the disk may thus be considered the angle passed through by one of the markings 12 in the time period in which the counter 15 counts down to zero.
  • the number of auxiliary pulses generated during a complete rotation of disk remains constant regardless of the rotational speed of the disk.
  • the angle, and correspondingly, the time, at which a control signal is furnished is always correctly determined by the number of auxiliary pulses following a start pulse.
  • the monostable multivibrator 19 may be switched to the unstable state when gate 14 is blocked.
  • FIG. 2 shows an alternative embodiment of the present invention which is simplified relative to the embodiment shown in FIG. 1. It will shown that gate 14 and the bistable circuit means 21 are omitted. Otherwise the same components are present as are present in FIG. 1. However, the markings which result in the generation of auxiliary pulses are situated on one predetermined part of the circumference of the disk only. The remainder of the circumference has no markings.
  • the reverse counting commences as soon as the markings for the auxiliary pulses are sensed by sensing means 11.
  • the monostable multivibrator 19 is switched to the unstable state whenever the generation of auxiliary pulses stops. When the monostable multivibrator is in the unstable state, counter 15 is supplied with set pulses from oscillator 18 as previously described.
  • the arrangement shown in FIG. 2 is generally preferable. If, however, the markings 12a and 12b generate pulses at least partly in a mechanical manner, then the arrangement of FIG. 1 may be preferable.
  • the distributor may have mechanical markings. If such an ignition system is to be retained, and only the fuel injection times are to be controlled by means of an electronically controlled injection system, then the electronic-mechanical arrangement results. If, however, the ignition time of an internal combustion engine is controlled purely electronically, then the markings 12 on disk 10 may of course be omitted. In order that the best possible correspondence exists between the conditions required by the operating parameters indicated by 20, it is desirable that the set pulses be furnished to the counter as closely to the beginning of the reverse counting procedure as possible.
  • FIG. 1 and 2 should not be construed as limiting the application of the present invention, since, for example, instead of a forward-reverse counter, two counters could be used and the control signals could be furnished when the count on both counters is equal.
  • a control arrangement comprising, in combination, disk means connected to said rotating element for synchronous rotation therewith, said disk means having a plurality of first markings and first and second further markings; first sensing means for sensing said first markings and generating auxiliary pulses in response thereto; second sensing means for sensing said first and second further markings and generating, respectively, a release and start pulse in response thereto; oscillator means for generating set pulses; forward-reverse counting means having a forward counting input and a reverse counting input, said counting means furnishing a control signal for controlling said operation of said other element when the count entered therein is a predetermined count; first gating means connecting said oscillator to said forward counting input; second gating means connecting said first sensing means to said reverse counting input; and means connecting said second sensing means to said first and second gating means in such a manner
  • a control arrangement comprising, in combination, disk means connected to said rotating element for synchronous rotation therewith, said disk means having a plurality of markings; sensing means for generating auxiliary pulses in response to said markings during a predetermined portion of the angular rotation of said disk; oscillator means for generating set pulses; forward-reverse counting means having a forward counting input and a reverse counting input and furnishing a control signal for timing said operation of said other element when the count on said counting means is a predetermined count; first connecting means connecting said oscillator means to said forward counting input in the absence of said auxiliary pulses; and second connecting means connecting said sensing means to said reverse counting input upon the start of generation of said auxiliary pulses.
  • a control arrangement comprising, in combination, auxiliary pulse generating means associated with said rotating element and adapted to furnish a predetermined number of auxiliary pulses during each rotation of said rotating element; counting means for counting said auxiliary pulses and furnishing said control signal when the counted number of auxiliary pulses during a rotation is equal to a preset number; oscillator means for generating set pulses for presetting said counting means to said preset number; first monostable circuit means having a stable and an unstable state, and adapted to remain in said unstable state for a time interval depending upon at least one operating parameter of said motor vehicle; and first gating means interconnecting said oscillator means and said counting means under control of said monostable circuit means in such a manner that set pulses are transmitted from said oscillator means to said counting means only when said monostable circuit means is in said
  • said counting means comprise a first and second counter; further comprising connecting means for connecting said auxiliary pulse generating means to said first counter; and additional connecting means for connecting said oscillator means to said second counter; and wherein said control signal is furnished when the count on said first counter is equal to the count on said second counter.
  • auxiliary pulse generating means comprise a disk mounted for synchronous rotation with said rotating element, said disk hav ing markings for generating said auxiliary pulses, said disk having a further marking for generating a release pulse; release pulse sensing means for sensing said further marking and furnishing a release pulse in response thereto; and additional connecting means for connecting said release pulse sensing means to said monostable circuit means in such a manner that a release pulse causes said monostable circuit means to be switched to said unstable state.
  • bistable circuit means for controlling said second gating means, said bistable circuit means having a set state wherein said second gating means permits transmission of said auxiliary pulses to said counting means and a reset state wherein said second gating means blocks transmission of said auxiliary pulses to said counting means; wherein said bistable circuit means is switched to said reset state by said control signal; further comprising means for furnishing a start signal for switching said bistable circuit means to the set state at a predetermined start time during each rotation of said rotating element.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Control Of Electric Motors In General (AREA)
US14513A 1969-02-26 1970-02-26 Arrangement for controlling processes which are dependent upon the angular position of a rotating member Expired - Lifetime US3652832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1909525A DE1909525C3 (de) 1969-02-26 1969-02-26 Anordnung zur Erzeugung von Steuersignalen für die Auslösung von Zünd oder Einspritzvorgängen bei Brennkraftmaschinen

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US3652832A true US3652832A (en) 1972-03-28

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US14513A Expired - Lifetime US3652832A (en) 1969-02-26 1970-02-26 Arrangement for controlling processes which are dependent upon the angular position of a rotating member

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US (1) US3652832A (enrdf_load_stackoverflow)
JP (1) JPS516802B1 (enrdf_load_stackoverflow)
AT (1) AT298158B (enrdf_load_stackoverflow)
BR (1) BR7017006D0 (enrdf_load_stackoverflow)
CH (1) CH501150A (enrdf_load_stackoverflow)
DE (1) DE1909525C3 (enrdf_load_stackoverflow)
ES (1) ES376893A1 (enrdf_load_stackoverflow)
FR (1) FR2030942A5 (enrdf_load_stackoverflow)
GB (1) GB1293246A (enrdf_load_stackoverflow)
NL (1) NL7002675A (enrdf_load_stackoverflow)
SE (1) SE351899B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742195A (en) * 1971-11-03 1973-06-26 W Randle Rally race computer
US3778833A (en) * 1971-07-29 1973-12-11 Us Navy Magnetic-electronic position encoder
USB354296I5 (enrdf_load_stackoverflow) * 1973-04-25 1975-01-28
US3953713A (en) * 1974-11-04 1976-04-27 Westvaco Corporation Reel diameter discriminator
US3980867A (en) * 1974-12-19 1976-09-14 Indicator Controls Corporation Traffic signal loop monitoring system
FR2305066A1 (fr) * 1975-03-20 1976-10-15 Bosch Gmbh Robert Procede pour determiner un processus repetitif dans le temps, et dispositif de mise en pratique du procede
FR2316796A1 (fr) * 1975-07-02 1977-01-28 Hartig Gunter Emetteur d'impulsions
US4133323A (en) * 1976-09-10 1979-01-09 Robert Bosch Gmbh Control trigger generating system, particularly to generate a trigger signal used in internal combustion engines, such as an ignition or fuel injection trigger signal
US4166977A (en) * 1976-09-16 1979-09-04 Robert Bosch Gmbh Rotary speed and angular position determination system, particularly for the crankshaft of an internal combustion engine
US4379239A (en) * 1981-07-22 1983-04-05 Firma Atlas Fahrzeugtechnik Gmbh Circuit for generating a trigger pulse
US4475086A (en) * 1982-03-31 1984-10-02 Eastman Kodak Company Duty cycle detector
US5066910A (en) * 1987-08-31 1991-11-19 Aisin Seiki Kabushiki Kaisha Rotational speed detector for an internal combustion engine comprising a waveform processor for eliminating unwanted pulses

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1402268A (en) * 1971-12-21 1975-08-06 Lucas Electrical Co Ltd Spark ignition systems
DE2346333C2 (de) * 1973-09-14 1985-02-14 Robert Bosch Gmbh, 7000 Stuttgart Digitale Schaltungsanordnung zur Ermittlung parameterabhängiger Zahlenwerte
DE2352941C2 (de) * 1973-10-23 1983-12-01 Robert Bosch Gmbh, 7000 Stuttgart Verfahren und Einrichtung zur Auslösung eines Impulses innerhalb eines Verstellbereiches einer Antriebsmaschine
DE2702208A1 (de) * 1977-01-20 1978-07-27 Bosch Gmbh Robert Verfahren und einrichtung zur ausloesung eines impulses innerhalb eines verstellbereiches
WO1989008774A1 (en) * 1988-03-18 1989-09-21 Robert Bosch Gmbh Apparatus for generating synchronisation pulses for an internal combustion engine

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3024986A (en) * 1959-05-04 1962-03-13 Bernard V Strianese Measuring system employing digital electronic circuitry
US3065461A (en) * 1958-06-30 1962-11-20 Ibm Magnetic recording apparatus
US3131383A (en) * 1960-02-08 1964-04-28 Ibm Single bit recording technique
US3163747A (en) * 1962-05-15 1964-12-29 Western Electric Co Circuit for analyzing selected patterns of multiple intelligence signals

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
DE1209361B (de) * 1962-09-18 1966-01-20 Philips Patentverwaltung Vorrichtung zur drehzahlabhaengigen Zuendzeit-punkteinstellung bei Brennkraftmaschinen
DE1195354B (de) * 1963-11-07 1965-06-24 Licentia Gmbh Zaehleinrichtung fuer auf zwei Kanaelen eintreffende Zaehlimpulse
AT270712B (de) * 1964-07-09 1969-05-12 Voest Ag Einrichtung zum Steuern von in einen Tiegel oder Konverter ein- und ausfahrbaren Blaslanzen
DE1235602B (de) * 1964-09-10 1967-03-02 Siemens Ag Anordnung zum Teilen von Kreisen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3065461A (en) * 1958-06-30 1962-11-20 Ibm Magnetic recording apparatus
US3024986A (en) * 1959-05-04 1962-03-13 Bernard V Strianese Measuring system employing digital electronic circuitry
US3131383A (en) * 1960-02-08 1964-04-28 Ibm Single bit recording technique
US3163747A (en) * 1962-05-15 1964-12-29 Western Electric Co Circuit for analyzing selected patterns of multiple intelligence signals

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778833A (en) * 1971-07-29 1973-12-11 Us Navy Magnetic-electronic position encoder
US3742195A (en) * 1971-11-03 1973-06-26 W Randle Rally race computer
USB354296I5 (enrdf_load_stackoverflow) * 1973-04-25 1975-01-28
US3914580A (en) * 1973-04-25 1975-10-21 Rockwell International Corp Timing control circuit for electronic fuel injection system
US3953713A (en) * 1974-11-04 1976-04-27 Westvaco Corporation Reel diameter discriminator
US3980867A (en) * 1974-12-19 1976-09-14 Indicator Controls Corporation Traffic signal loop monitoring system
FR2305066A1 (fr) * 1975-03-20 1976-10-15 Bosch Gmbh Robert Procede pour determiner un processus repetitif dans le temps, et dispositif de mise en pratique du procede
FR2316796A1 (fr) * 1975-07-02 1977-01-28 Hartig Gunter Emetteur d'impulsions
US4133323A (en) * 1976-09-10 1979-01-09 Robert Bosch Gmbh Control trigger generating system, particularly to generate a trigger signal used in internal combustion engines, such as an ignition or fuel injection trigger signal
US4166977A (en) * 1976-09-16 1979-09-04 Robert Bosch Gmbh Rotary speed and angular position determination system, particularly for the crankshaft of an internal combustion engine
US4379239A (en) * 1981-07-22 1983-04-05 Firma Atlas Fahrzeugtechnik Gmbh Circuit for generating a trigger pulse
US4475086A (en) * 1982-03-31 1984-10-02 Eastman Kodak Company Duty cycle detector
US5066910A (en) * 1987-08-31 1991-11-19 Aisin Seiki Kabushiki Kaisha Rotational speed detector for an internal combustion engine comprising a waveform processor for eliminating unwanted pulses

Also Published As

Publication number Publication date
FR2030942A5 (enrdf_load_stackoverflow) 1970-11-13
DE1909525B2 (de) 1974-10-24
NL7002675A (enrdf_load_stackoverflow) 1970-08-28
ES376893A1 (es) 1972-05-01
GB1293246A (en) 1972-10-18
BR7017006D0 (pt) 1973-01-02
CH501150A (de) 1970-12-31
JPS516802B1 (enrdf_load_stackoverflow) 1976-03-02
SE351899B (enrdf_load_stackoverflow) 1972-12-11
AT298158B (de) 1972-04-25
DE1909525A1 (de) 1970-09-10
DE1909525C3 (de) 1984-10-04

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