GB1245648A - Method of regulation of the duration of a repeated rectangular electric control signal and device for carrying out this method - Google Patents
Method of regulation of the duration of a repeated rectangular electric control signal and device for carrying out this methodInfo
- Publication number
- GB1245648A GB1245648A GB42600/68A GB4260068A GB1245648A GB 1245648 A GB1245648 A GB 1245648A GB 42600/68 A GB42600/68 A GB 42600/68A GB 4260068 A GB4260068 A GB 4260068A GB 1245648 A GB1245648 A GB 1245648A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- injection
- circuit
- engine
- voltage
- 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
Links
- 230000033228 biological regulation Effects 0.000 title abstract 3
- 238000002347 injection Methods 0.000 abstract 14
- 239000007924 injection Substances 0.000 abstract 14
- 239000003990 capacitor Substances 0.000 abstract 8
- 230000001105 regulatory effect Effects 0.000 abstract 7
- 230000000295 complement effect Effects 0.000 abstract 2
- 230000003292 diminished effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000001960 triggered effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/32—Controlling fuel injection of the low pressure type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
1,245,648. Pulse duration control circuits. SOC. DES PROCEDES MODERNES D'INJECTION SOPROMI. 6 Sept., 1968 [26 Sept., 1967], No. 42600/68. Heading H3T. [Also in Division G3] The duration of pulses is regulated in dependence upon their repetition frequency (e.g. to reduce the duration with increasing frequency) by producing a regulating voltage which starts to increase a predetermined time after an input pulse, terminating the increase by a succeeding input pulse and using the amplitude of the regulating voltage to control the timing of the trailing edge of a following output pulse. The invention as described controls the width of fuel injection pulses of an engine to maintain the speed constant by reducing the pulse width if the speed exceeds the desired value. In Fig. 2, pulses A from the engine trigger a variable duration monostable circuit producing injection pulses . Ti, they also trigger a reference period producing monostable circuit providing pulses To. The end of this pulse (c) initiates the charging of a capacitor and this charging is terminated either by it reaching a limiting value Vm or, if this occurs first, at V R , the value when the next engine pulse occurs. The amplitude of this voltage is used to control the unstable period of the monostable circuit producing the injection pulses. Thus if the engine is going too slowly the regulation voltage reaches its maximum value and maximum length injection pulses are provided. If the engine is running too fast the gap between the end of the reference pulse and the beginning of the next input pulse is reduced and the amplitude of the regulating signal is reduced, this correspondingly reducing the length of the injection pulses. The circuit may be arranged such that if the engine speed is much too slow the injection pulses are reduced in length (Fig. 9, not shown). In Fig. 4, a negative pulse at E1 triggers a complementary type monostable circuit T1, T2, U1, timed by a capacitor C1 and a unijunction transistor U1. The output of this at S1 operates the injection circuit. The leading edge of the injection pulse triggers a similar complementary type monostable circuit T3, T4, U 2 producing the reference pulse. The trailing edge of this pulse switches off a transistor T6 so that a capacitor C3 charges through R21 and an adjustable resistor P4 and this produces a corresponding regulating voltage in a capacitor C4 where the voltage is stored. This voltage is applied to a base of the unijunction transistor U1 to control the timing circuit of the injection pulse monostable circuit T1, T2 so as to control the trailing edge of the next pulse produced by that circuit, the higher the regulating voltage the longer the pulse. If the engine is running too slowly the capacitor C3 and C4 have time to charge to their maximum value and accordingly the next injection pulse is of maximum length. If the engine is running too fast, i.e. if the next pulse occurs too soon after the end of the pulse from the monostable circuit T3, T4 the charge across C3 and C4 does not reach its maximum value, the regulting voltage is diminished and the injection pulse is correspondingly shorter. At the end of each injection pulse a voltage from T2 through T8 is momentarily applied to a transistor T9 which discharges C3 ready for the next charging cycle. Capacitor C4 discharges slowly through the unijunction diode of U1 until clamped by diode D7 and potentiometer P3. The timing capacitor C2 of the reference pulse generator T3, T4 is discharged at the instant of triggering by a transistor T5 which is rendered momentarily conducting by the leading edge of the triggering pulse applied through D3 and C7. This ensures correct operation if the resistor P2 is adjusted suddenly. The circuit may be adapted to operate on every nth pulse, where n is greater than 1, in which case some modification of the triggering and regulating voltage holding capacitor circuit is necessary (Figs. 5 to 7, not shown). The length of the injection pulse may also be made to decrease if the engine speed is too slow and thus the repetition frequency of the input voltages too low. This is effected (Figs. 8 to 11, not shown) by a further monostable circuit (C) which is triggered by the trailing edge of the reference pulse generator (D). If the engine speed is below a predetermined level the spacing between the engine pulses would exceed the sum of the reference pulse and the further pulse in which case a discharging circuit (D) causes the regulation voltage to decrease (E, e-f), this decrease being terminated either by the next input pulse or, if it exceeds a predetermined duration, by the operation of a circuit (D) which relaxes after a given interval and prevents further discharge.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR122241 | 1967-09-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1245648A true GB1245648A (en) | 1971-09-08 |
Family
ID=8638967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB42600/68A Expired GB1245648A (en) | 1967-09-26 | 1968-09-06 | Method of regulation of the duration of a repeated rectangular electric control signal and device for carrying out this method |
Country Status (9)
Country | Link |
---|---|
US (1) | US3651343A (en) |
CS (1) | CS179903B2 (en) |
DE (1) | DE1788063C3 (en) |
DK (1) | DK132463C (en) |
ES (2) | ES358502A1 (en) |
FR (1) | FR1581459A (en) |
GB (1) | GB1245648A (en) |
NL (1) | NL6813025A (en) |
SE (1) | SE350095B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2128376A (en) * | 1982-09-30 | 1984-04-26 | Gen Electric | Overspeed sensing system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797469A (en) * | 1971-04-06 | 1974-03-19 | Diesel Kiki Co | Distributor-type fuel injection pump for internal combustion engines |
US3786789A (en) * | 1971-11-15 | 1974-01-22 | Gen Motors Corp | Electronic fuel injection system having coarse and fine speed compensation |
FR2235278B1 (en) * | 1973-06-27 | 1980-03-14 | Sopromi Soc Proc Modern Inject | |
US4180020A (en) * | 1973-09-26 | 1979-12-25 | The Bendix Corporation | Pulse smoothing circuit for an electronic fuel control system |
GB1564496A (en) * | 1975-09-05 | 1980-04-10 | Lucas Industries Ltd | Electronic fuel injection control for an internal combustion engine |
US5894239A (en) * | 1997-04-18 | 1999-04-13 | International Business Machines Corporation | Single shot with pulse width controlled by reference oscillator |
DE102006042098B3 (en) * | 2006-09-07 | 2008-05-21 | Siemens Ag | Method for determining a correction of a partial injection quantity of an internal combustion engine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2794123A (en) * | 1954-02-10 | 1957-05-28 | Bell Telephone Labor Inc | Electrical delay circuits |
BE571257A (en) * | 1957-09-18 | 1900-01-01 | ||
DE1231954B (en) * | 1964-01-11 | 1967-01-05 | Bosch Gmbh Robert | Electrical control device equipped with a monostable multivibrator for operating the intake manifold injection system of an internal combustion engine |
-
1967
- 1967-09-26 FR FR122241A patent/FR1581459A/fr not_active Expired
-
1968
- 1968-09-06 GB GB42600/68A patent/GB1245648A/en not_active Expired
- 1968-09-12 NL NL6813025A patent/NL6813025A/xx not_active Application Discontinuation
- 1968-09-20 US US761117A patent/US3651343A/en not_active Expired - Lifetime
- 1968-09-23 DK DK455968A patent/DK132463C/en active
- 1968-09-23 CS CS6800006660A patent/CS179903B2/en unknown
- 1968-09-25 SE SE12936/68A patent/SE350095B/xx unknown
- 1968-09-25 ES ES358502A patent/ES358502A1/en not_active Expired
- 1968-09-26 DE DE1788063A patent/DE1788063C3/en not_active Expired
- 1968-11-20 ES ES360451A patent/ES360451A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2128376A (en) * | 1982-09-30 | 1984-04-26 | Gen Electric | Overspeed sensing system |
Also Published As
Publication number | Publication date |
---|---|
SE350095B (en) | 1972-10-16 |
DE1788063B2 (en) | 1973-05-17 |
ES358502A1 (en) | 1970-04-16 |
DK132463B (en) | 1975-12-08 |
NL6813025A (en) | 1969-03-28 |
DE1788063A1 (en) | 1972-01-05 |
DE1788063C3 (en) | 1973-11-29 |
ES360451A1 (en) | 1970-07-01 |
FR1581459A (en) | 1969-09-19 |
US3651343A (en) | 1972-03-21 |
CS179903B2 (en) | 1977-12-30 |
DK132463C (en) | 1976-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1287058A (en) | Maximum engine speed limiting ignition system | |
US4174696A (en) | Ignition system | |
GB1245648A (en) | Method of regulation of the duration of a repeated rectangular electric control signal and device for carrying out this method | |
US3048708A (en) | Pulse timing control circuit | |
US3497725A (en) | Monostable multivibrator | |
US3555305A (en) | Pulse generating circuit arrangment for producing pulses of different adjustable durations | |
GB1213648A (en) | Electric discharge machining apparatus | |
US6140847A (en) | Circuit for generating pulses of high voltage current delivered into a load circuit and implementing method | |
US3289104A (en) | Gated unijunction oscillator with feedback control | |
GB1056563A (en) | Motor control system | |
GB1181340A (en) | Electric Motor Control Circuit | |
US3123723A (en) | Staircase wave generator employing two four-layer diodes | |
GB1233367A (en) | ||
GB1338776A (en) | Automatic time control circuit | |
US3329907A (en) | Multi-frequency relaxation oscillator and timing circuit | |
SU725204A1 (en) | Multi-channel pulse generator | |
SU782132A1 (en) | Device for shaping control pulses for thyristor | |
US2972118A (en) | Blocking oscillator circuit | |
SU362423A1 (en) | ADJUSTABLE PULSE GENERATOR | |
SU1046918A1 (en) | Pulse generator | |
GB1273441A (en) | Pulse generator circuit | |
SU367532A1 (en) | STRAINED VOLTAGE GENERATOR | |
SU1095339A1 (en) | Device for automatic control of frequency and active power | |
SU1277366A1 (en) | Generator of time intervals | |
SU464970A1 (en) | Dc to pulse frequency converter |