GB1584618A – Combination of an internal combustion engine and an inductive scanning device
– Google Patents
GB1584618A – Combination of an internal combustion engine and an inductive scanning device
– Google Patents
Combination of an internal combustion engine and an inductive scanning device
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Publication number
GB1584618A
GB1584618A
GB3095777A
GB3095777A
GB1584618A
GB 1584618 A
GB1584618 A
GB 1584618A
GB 3095777 A
GB3095777 A
GB 3095777A
GB 3095777 A
GB3095777 A
GB 3095777A
GB 1584618 A
GB1584618 A
GB 1584618A
Authority
GB
United Kingdom
Prior art keywords
core
scanning device
shaped
internal combustion
inductive scanning
Prior art date
1976-07-29
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
GB3095777A
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
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.)
1976-07-29
Filing date
1977-07-22
Publication date
1981-02-18
1977-07-22
Application filed by Mannesmann VDO AG
filed
Critical
Mannesmann VDO AG
1981-02-18
Publication of GB1584618A
publication
Critical
patent/GB1584618A/en
Status
Expired
legal-status
Critical
Current
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Espacenet
Global Dossier
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Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude
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
F02P7/0677—Mechanical arrangements
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
G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
Description
(54) THE COMBINATION OF AN INTERNAL COMBUSTION ENGINEw AND AN INDUCTIVE SCANNING DEVICE
(71) We, VDO ADOLF SCHINDLING AG, of 103 Graftstrasse, FrankfurtlMain, Germany, a body corporate organized according to the laws of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to the combination of an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device having a transmitting element formed with a slot through which the element to be scanned is passed and, located on both sides of the slot, oscillation frequency determining elements of an oscillator which is a part of the electronic system of the scanning device.
Some known combinations of internal combustion engines and inductive scanning devices of this type, which are generally known as slot initiators, possess a transmitter element having a slot on both sides of which there is in each particular instance arranged a coil having a ferromagnetic or ferrite core. One of the two coils is the oscillation coil and the other the feedback coil of an oscillator the output signals of which are rectified before being fed to a threshold value switch. If there is a metallic object between the two coils, the oscillator is damped and there appears at the threshold value switch either no output signal or an output signal having a predetermined first amplitude. When the metallic object is removed out of the zone between the coils, the oscillator begins to oscillate and there appears at the output of the threshold value switch a signal having a predetermined second amplitude.
These known combinations of internal combustion engines and scanning devices which are used in conjunction with a serrated disc travelling through the slot, for the measurement of speed, have the disadvantage that their structural volume is relatively large and that as a rule a three-wire or three-core line is required for connection thereto to the oscillator.
Additionally, they have the disadvantage that variations in the clear coil spacing which may already be based on manufacturing tolerance may produce variations in the sensitivity of the arrangements. Finally, since their coils are sealed with resin for fixing the spacing and achieving the smallest possible structural volume, they can be employed only within a limited temperature range of approximately -15 OC to approximately +80 OC.
According to the present invention, there is provided the combination of an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device including a ferrite core having a pair of limbs extending to define a slot through which an element to be scanned is passed, a coil carried by said core, and an oscillator, the oscillation frequency determining elements of which are said limbs.
The transmitter element can thus be designed to be as small as desired. The limits are determined solely by the thickness of the object to be scanned, in accordance with which the slot dimensioning must be determined. The need for fixing the spacing of the core elements is dispensed with since there is only a single core, and this dispenses also with the abovementioned disadvantages connected therewith.
A special advantage of the invention resides in that the transmitter element is substantially less sensitive to jarring than are the known ones.
In a preferred form, the core may be of approximate U-shape. In an alternative form, the core may be of approximate C-shape. Such design has, by comparison with the previously described design, the advantage that the magnetic field is focused more strongly with the result that variations in the depth of dipping of the article to be scanned into the slot have no or at most only negligible influence on the measurement. This influence can be further reduced by the arrangement whereby in the case of a core designed to be of C-shape the effective cross section end faces extend parallel to each other. This arrangement achieves further focusing of the magnetic field.
The present invention will now be described in greater detail by way of example with reference to the accompanying drawing wherein:
Figure 1 shows a block circuit diagram of one preferred form of an inductive scanning device hacing a transmitter element provided with a U-shaped core; and
Figure 2 shows a transmitter element having a C-shaped core.
Referring first to Figure 1, the inductive scanning device comprises a transmitter element 1 having a slot 2 into which projects a rotating disc 3 having teeth 4. The transmitter element 1 comprises a U-shaped ferrite core 5 having two limbs 6 and 7, forming the slot 2, and a coil 8.
The coil 8 together with the core 5, is the oscillation frequency determining element of an oscillator 9. The oscillator 9 feeds a rectifier stage 10. The output from the rectifier stage 10 feeds a threshold value switch 11 which in turn feeds a power stage 12. The power stage 12 supplies a pulse signal, the frequency of which is proportional to the speed of the disc 3. The said pulse signal may be used to trigger an ignition system such as that of an internal combustion engine.
Referring now to the modified arrangement shown in Figure 2, the transmitter element 1′ comprises a C-shaped ferrite core 13 the effective cross sectional end faces 14 and 15 of which extend parallel to each other.
WHAT WE CLAIM IS:
1. In combination an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device including a ferrite core having a pair of limbs extending to define a slot through which an element to be scanned is passed, a coil carried by said core, and an oscillator, the oscillation frequency determining elements of which are said limbs.
2. The combination according to claim 1, wherein the core is designed to be approximately U-shaped.
3. The combination according to claim 1, wherein the core is designed to be approximately Shaped.
4. The combination according to claim 3, wherein the effective cross sectional end faces extend parallel to each other.
5. The combination of an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device being constructed substantially as herein described with reference to and as illustrated in Figure 1 or Figure 2 of the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
**WARNING** start of CLMS field may overlap end of DESC **. device hacing a transmitter element provided with a U-shaped core; and Figure 2 shows a transmitter element having a C-shaped core. Referring first to Figure 1, the inductive scanning device comprises a transmitter element 1 having a slot 2 into which projects a rotating disc 3 having teeth 4. The transmitter element 1 comprises a U-shaped ferrite core 5 having two limbs 6 and 7, forming the slot 2, and a coil 8. The coil 8 together with the core 5, is the oscillation frequency determining element of an oscillator 9. The oscillator 9 feeds a rectifier stage 10. The output from the rectifier stage 10 feeds a threshold value switch 11 which in turn feeds a power stage 12. The power stage 12 supplies a pulse signal, the frequency of which is proportional to the speed of the disc 3. The said pulse signal may be used to trigger an ignition system such as that of an internal combustion engine. Referring now to the modified arrangement shown in Figure 2, the transmitter element 1′ comprises a C-shaped ferrite core 13 the effective cross sectional end faces 14 and 15 of which extend parallel to each other. WHAT WE CLAIM IS:
1. In combination an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device including a ferrite core having a pair of limbs extending to define a slot through which an element to be scanned is passed, a coil carried by said core, and an oscillator, the oscillation frequency determining elements of which are said limbs.
2. The combination according to claim 1, wherein the core is designed to be approximately U-shaped.
3. The combination according to claim 1, wherein the core is designed to be approximately Shaped.
4. The combination according to claim 3, wherein the effective cross sectional end faces extend parallel to each other.
5. The combination of an internal combustion engine and an inductive scanning device for controlling the timing of the ignition system, said inductive scanning device being constructed substantially as herein described with reference to and as illustrated in Figure 1 or Figure 2 of the accompanying drawing.
GB3095777A
1976-07-29
1977-07-22
Combination of an internal combustion engine and an inductive scanning device
Expired
GB1584618A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19762634063
DE2634063A1
(en)
1976-07-29
1976-07-29
INDUCTIVE SCANNING DEVICE
Publications (1)
Publication Number
Publication Date
GB1584618A
true
GB1584618A
(en)
1981-02-18
Family
ID=5984206
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3095777A
Expired
GB1584618A
(en)
1976-07-29
1977-07-22
Combination of an internal combustion engine and an inductive scanning device
Country Status (2)
Country
Link
DE
(1)
DE2634063A1
(en)
GB
(1)
GB1584618A
(en)
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2836000A1
(en)
*
1978-08-17
1980-03-06
Bosch Gmbh Robert
Inductive linear or rotary motion transducer – uses short-circuit plate extending between arms of U=shaped core
CN103529234A
(en)
*
2013-09-30
2014-01-22
江阴众和电力仪表有限公司
Device for detecting revolution speed of nuclear-stage main pump
1976
1976-07-29
DE
DE19762634063
patent/DE2634063A1/en
not_active
Withdrawn
1977
1977-07-22
GB
GB3095777A
patent/GB1584618A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2634063A1
(en)
1978-02-02
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Legal Events
Date
Code
Title
Description
1981-05-07
PS
Patent sealed
1982-02-17
PCNP
Patent ceased through non-payment of renewal fee
