GB1261223A - Improvements in or relating to fuel injection systems for internal combustion engines - Google Patents
Improvements in or relating to fuel injection systems for internal combustion enginesInfo
- Publication number
- GB1261223A GB1261223A GB23652/69A GB2365269A GB1261223A GB 1261223 A GB1261223 A GB 1261223A GB 23652/69 A GB23652/69 A GB 23652/69A GB 2365269 A GB2365269 A GB 2365269A GB 1261223 A GB1261223 A GB 1261223A
- Authority
- GB
- United Kingdom
- Prior art keywords
- multivibrator
- pulses
- pulse
- additional
- gate
- 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
Classifications
-
- 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
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)
- Manipulation Of Pulses (AREA)
Abstract
1,261,223. Transistor pulse circuits. ROBERT BOSCH G.m.b.H. 9 May, 1969 [11 May, 1968], No. 23652/69. Heading H3T. [Also in Divisions F1, G1 and H1] In an electronically controlled I.C. engine fuel injection system, during acceleration fuel enrichment is provided by an additional number of opening pulses produced between the normal opening pulses, the additional opening pulses being triggered by a device connected to the butterfly valve in the intake manifold when this butterfly valve is opened during acceleration. The number of additional pulses is dependent upon the amount the butterfly valve is opened. As shown, the normal opening pulses, having a duration dependent upon the intake manifold pressure, are produced by a control multivibrator 150 which is triggered in synchronism with the engine speed by switches 101, 102 via a bi-stable multivibrator 130, these opening pulses being applied to two groups of solenoid injection valves 110, 120 via a device 170, an OR gate 165 and respective AND gates 115, 125 dependent upon which switch 101, 102 is closed, the switches 101, 102 being alternately closed for 180 degrees of the crank-shaft rotation. Additional pulses of constant duration are produced by a monostable multivibrator 250, having a capacitor 257 as its timing element, and are applied to OR gate 165, the multivibrator 250 being triggered by a bi-stable multivibrator 230 which is switched over by a switch 40 operated when the butterfly valve is opened. In an alternative, Fig. 9 (not shown), the device 170 is replaced by a multiplier circuit (300) containing a storage capacitor (305). The multivibrator 150 produces pulses (Js) having a period during which the capacitor (305) is charged by a charging current (i 1 ). As described, the discharge current is selected to be equal to the charging current (i 1 ) and the normal opening pulses (Jn) at the OR gate 165 have a duration which is twice that of pulses (Js). These pulses (Jn) are applied to the solenoids via OR gate 165 and AND gates 115, 125 as above. The additional pulses (Z) are produced as above but in this case they also cause the normal pulse (Jn) to be prolonged. During each additional pulse a capacitor (263), connected in an emitter follower circuit to the output transistor 252 of multivibrator 250, is charged in steps, each step corresponding to an additional pulse. The transistor (265) of the emitter follower circuit supplies a current (i 2 ) to the capacitor (305) thus increasing the charging current of (305) to i 1 + i 2 and thus prolonging the normal pulse (Jn). The capacitor (263) has a large time constant and so each pulse (Jn) is prolonged even after the additional pulses are discontinued. The multivibrator 250 may be provided with means (253), (254) for shortening successive additional pulses. In a further modification, the output of multiplier (300) is connected directly to each AND gate 115, 125, the output of each AND being connected to one input of one or two OR gates, the other input of each OR gate being connected to the output of the multivibrator 250. In the above embodiments, any additional pulses triggered during the period of a normal pulse are lost in that normal pulse. In the embodiment of Fig. 11 (not shown), any additional pulse occurring during a normal pulse is added to the end of that normal pulse. The output of OR gate 165 is connected to a combined multivibrator and logic circuit which is triggered by the bi-stable multivibrators 230. The multivibrator and logic circuit is also connected to a respective AND gate 115, 125, the connections to the OR and AND gates having a common junction (G) in the multivibrator and logic circuit. Each AND gate 115, 125 can only be triggered when the potential at (G) is negative, and this occurs during the normal pulse from multiplier (300) and during the period of any additional pulse when the output transistor (272) of the multivibrator is conductive. The duration of the additional pulses is again determined by the charging time of a capacitor (282) in the multivibrator. If an additional pulse is triggered during a normal pulse the charging of the capacitor (282) is delayed by the logic circuit until the end of the normal pulse and the additional pulse is thus added to the end of the normal pulse.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681751330 DE1751330B1 (en) | 1968-05-11 | 1968-05-11 | Electrically controlled fuel injection system for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1261223A true GB1261223A (en) | 1972-01-26 |
Family
ID=5692254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23652/69A Expired GB1261223A (en) | 1968-05-11 | 1969-05-09 | Improvements in or relating to fuel injection systems for internal combustion engines |
Country Status (12)
Country | Link |
---|---|
US (1) | US3593692A (en) |
JP (1) | JPS4940580B1 (en) |
BE (1) | BE732840A (en) |
BR (1) | BR6908658D0 (en) |
CH (1) | CH499014A (en) |
DD (1) | DD78430A3 (en) |
DE (1) | DE1751330B1 (en) |
ES (1) | ES367050A1 (en) |
FR (1) | FR1602190A (en) |
GB (1) | GB1261223A (en) |
NL (1) | NL6906025A (en) |
SE (1) | SE339891B (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3719176A (en) * | 1969-07-29 | 1973-03-06 | Toyota Motor Co Ltd | Electric fuel injection control system for internal combustion engines |
US3759231A (en) * | 1970-05-07 | 1973-09-18 | Nippon Denso Co | Electrical fuel injection control system for internal combustion engines |
JPS50217B1 (en) * | 1970-09-25 | 1975-01-07 | ||
US3919981A (en) * | 1970-12-28 | 1975-11-18 | Bendix Corp | Circuit for providing electronic enrichment fuel compensation in an electronic fuel control system |
GB1422775A (en) * | 1972-02-25 | 1976-01-28 | Lucas Electrical Co Ltd | Fuel injection systems |
GB1435098A (en) * | 1972-05-13 | 1976-05-12 | Lucas Electrical Ltd | Fuel supply systems for internal combustion engines |
US3918417A (en) * | 1972-10-27 | 1975-11-11 | Gen Motors Corp | Electronic fuel injection system |
JPS49122963U (en) * | 1973-02-21 | 1974-10-22 | ||
JPS5441226Y2 (en) * | 1974-04-02 | 1979-12-03 | ||
US3926153A (en) * | 1974-04-03 | 1975-12-16 | Bendix Corp | Closed throttle tip-in circuit |
US4159697A (en) * | 1976-10-04 | 1979-07-03 | The Bendix Corporation | Acceleration enrichment circuit for fuel injection system having potentiometer throttle position input |
JPS5394770U (en) * | 1976-12-28 | 1978-08-02 | ||
US4153014A (en) * | 1977-03-17 | 1979-05-08 | The Bendix Corporation | Peripheral circuitry for single-point fuel injection |
US4176625A (en) * | 1977-04-20 | 1979-12-04 | The Bendix Corporation | Pulse time addition circuit for electronic fuel injection systems |
JPS6047460B2 (en) * | 1977-10-19 | 1985-10-22 | トヨタ自動車株式会社 | fuel injection control device |
JPS5840027B2 (en) * | 1977-12-09 | 1983-09-02 | 株式会社日本自動車部品総合研究所 | Ignition system for internal combustion engines |
US4266275A (en) * | 1979-03-28 | 1981-05-05 | The Bendix Corporation | Acceleration enrichment feature for electronic fuel injection system |
JPS56101030A (en) * | 1980-01-18 | 1981-08-13 | Toyota Motor Corp | Method of electronically controlled fuel injection for internal combustion engine |
JPS56124638A (en) * | 1980-03-07 | 1981-09-30 | Toyota Motor Corp | Method of controlling fuel supply to internal combustion engine |
JPS56154132A (en) * | 1980-04-28 | 1981-11-28 | Toyota Motor Corp | Electronic control system of fuel jet for internal combustion engine |
JPS6032955A (en) * | 1983-08-01 | 1985-02-20 | Toyota Motor Corp | Controlling method of fuel injection |
JPS6062638A (en) * | 1983-09-16 | 1985-04-10 | Mazda Motor Corp | Fuel injection device of engine |
DE3538114A1 (en) * | 1985-10-26 | 1987-04-30 | Bayerische Motoren Werke Ag | Flap-type flow meter, in particular air flow meter for intake systems of internal combustion engines |
DE10240719B4 (en) * | 2002-09-04 | 2006-01-19 | Hilti Ag | Electric hand tool with soft start |
DE102017006770A1 (en) | 2017-07-18 | 2019-01-24 | Johannes Klimeck jun. | THROTTLE VALVE ADJUSTABLE, METHOD FOR OPERATING A THROTTOP VALVES, INTERNAL COMBUSTION ENGINE, AND MOTOR VEHICLE |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1116473B (en) * | 1956-02-24 | 1961-11-02 | Bendix Corp | Accelerator device for internal combustion engines working with electrical means |
BE571257A (en) * | 1957-09-18 | 1900-01-01 | ||
DE1059235B (en) * | 1957-10-04 | 1959-06-11 | Daimler Benz Ag | Device for regulating the amount of fuel in injection pumps of internal combustion engines, in particular gasoline injection engines |
DE1193728B (en) * | 1959-10-07 | 1965-05-26 | Bosch Gmbh Robert | Electrically controlled fuel injection system for internal combustion engines |
FR1453811A (en) * | 1964-09-09 | 1966-07-22 | Ass Eng Ltd | Injection device for internal combustion engine |
FR96024E (en) * | 1967-05-24 | 1972-05-19 |
-
1968
- 1968-05-11 DE DE19681751330 patent/DE1751330B1/en not_active Withdrawn
- 1968-12-31 FR FR1602190D patent/FR1602190A/fr not_active Expired
-
1969
- 1969-04-18 NL NL6906025A patent/NL6906025A/xx unknown
- 1969-04-21 SE SE05608/69A patent/SE339891B/xx unknown
- 1969-05-09 US US826058A patent/US3593692A/en not_active Expired - Lifetime
- 1969-05-09 BR BR208658/69A patent/BR6908658D0/en unknown
- 1969-05-09 BE BE732840D patent/BE732840A/xx unknown
- 1969-05-09 DD DD13973569A patent/DD78430A3/de unknown
- 1969-05-09 GB GB23652/69A patent/GB1261223A/en not_active Expired
- 1969-05-09 CH CH712169A patent/CH499014A/en not_active IP Right Cessation
- 1969-05-10 ES ES367050A patent/ES367050A1/en not_active Expired
- 1969-05-10 JP JP44035557A patent/JPS4940580B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR1602190A (en) | 1970-10-19 |
CH499014A (en) | 1970-11-15 |
NL6906025A (en) | 1969-11-13 |
US3593692A (en) | 1971-07-20 |
DD78430A3 (en) | 1970-12-12 |
BE732840A (en) | 1969-10-16 |
DE1751330B1 (en) | 1971-01-07 |
JPS4940580B1 (en) | 1974-11-02 |
SE339891B (en) | 1971-10-25 |
BR6908658D0 (en) | 1973-05-31 |
ES367050A1 (en) | 1971-04-01 |
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