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GB1376235A - Device for monitoring the speed of an internal combustion engine - Google Patents

Device for monitoring the speed of an internal combustion engine

Info

Publication number
GB1376235A
GB1376235A GB205972A GB205972A GB1376235A GB 1376235 A GB1376235 A GB 1376235A GB 205972 A GB205972 A GB 205972A GB 205972 A GB205972 A GB 205972A GB 1376235 A GB1376235 A GB 1376235A
Authority
GB
United Kingdom
Prior art keywords
engine
capacitor
voltage
speed
thyristor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB205972A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19712101762 external-priority patent/DE2101762A1/en
Priority claimed from DE19712101763 external-priority patent/DE2101763A1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1376235A publication Critical patent/GB1376235A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • G01P3/4807—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general by using circuits for the detection of the pulses delivered by the ignition system of an internal combustion engine
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/106—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the time duration between two impulses with a reference time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Testing Of Engines (AREA)

Abstract

1376235 Measuring speed of an I C engine electrically ROBERT BOSCH GmbH 17 Jan 1972 [15 Jan 1971 (2)] 2059/72 Heading G1N Apparatus for monitoring the speed of an I.C. engine comprises means for producing a train of constant voltage pulses initiated by the ignition pulses, which are used to charge a capacitor to a voltage representing the engine speed, which voltage operates an alarm if the speed exceeds a predetermined value. The engine ignition system comprises a battery 37 Fig. 1 charging a capacitor 44. As shown for a 4-cylinder engine, a contact breaker 63 is opened four times per engine revolution, each opening causing a thyristor 58 to conduct, thereby discharging capacitor 44 through the primary winding 49 of the ignition coil 50, the corresponding high voltage pulse in the secondary winding 52 being fed by the rotor arm 53 sequentially to the spark-plugs 54-57. Each discharge pulse from capacitor 44 is also fed from terminal 66" or 66' via lead 17 to charge a capacitor 13 in the monitoring circuit 12 to a voltage determined by Zener diode 22 and discharging resistor 14. The average voltage across capacitor 13, determined by integrating unit 23, represents the angular speed of the engine. If this voltage exceeds a predetermined value set by resistors 29, 31 a thyristor 26 fires and energizes a buzzer 38. A negative temperature coefficient resistor 30 compensates for temperature variations. The thyristor 26 may be replaced by a Schmitt trigger circuit.
GB205972A 1971-01-15 1972-01-17 Device for monitoring the speed of an internal combustion engine Expired GB1376235A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19712101762 DE2101762A1 (en) 1971-01-15 1971-01-15 Device for monitoring the speed of an internal combustion engine
DE19712101763 DE2101763A1 (en) 1971-01-15 1971-01-15 Device for monitoring the speed of an internal combustion engine

Publications (1)

Publication Number Publication Date
GB1376235A true GB1376235A (en) 1974-12-04

Family

ID=25760516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB205972A Expired GB1376235A (en) 1971-01-15 1972-01-17 Device for monitoring the speed of an internal combustion engine

Country Status (1)

Country Link
GB (1) GB1376235A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162498A1 (en) * 2000-06-05 2001-12-12 Konica Corporation Temperature-compensed electronic flash device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1162498A1 (en) * 2000-06-05 2001-12-12 Konica Corporation Temperature-compensed electronic flash device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee