DE2203018C3 - Fuel injection system - Google Patents
Fuel injection systemInfo
- Publication number
- DE2203018C3 DE2203018C3 DE2203018A DE2203018A DE2203018C3 DE 2203018 C3 DE2203018 C3 DE 2203018C3 DE 2203018 A DE2203018 A DE 2203018A DE 2203018 A DE2203018 A DE 2203018A DE 2203018 C3 DE2203018 C3 DE 2203018C3
- Authority
- DE
- Germany
- Prior art keywords
- valve
- fuel
- measuring element
- metering
- fuel injection
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
- F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air
- F02M69/22—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air the device comprising a member movably mounted in the air intake conduit and displaced according to the quantity of air admitted to the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
- F02M69/26—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means varying fuel pressure in a fuel by-pass passage, the pressure acting on a throttle valve against the action of metered or throttled fuel pressure for variably throttling fuel flow to injection nozzles, e.g. to keep constant the pressure differential at the metering valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines
- F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages
- F02M69/38—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device
- F02M69/386—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device variably controlling the pressure of the fuel by-passing the metering valves, e.g. by valves responsive to signals of temperature or oxygen sensors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Leitung 14 dem Zumeßventil 7 zuführt. Von der Leitung 14 zweigt eine Leitung 15 ab, in die ein Druckbegrenzungsventil 16 geschaltet ist, das bei zu großem Systemdruck Kraftstoff in einen Kraftstoffbehälter 17 zurückfließen läßt.Line 14 feeds the metering valve 7. From the line 14 branches off a line 15 into which a pressure relief valve 16 is connected, which is too large System pressure allows fuel to flow back into a fuel tank 17.
Der Steuerschieber 11 wird durch Druckflüssigkeit beaufschlagt, die als Rückstellkraft für das Meßorgan 3 dient und über eine Leitung 20 mit einer Drossel 21 auf den Steuerschieber wirkt.The control slide 11 is acted upon by hydraulic fluid, which acts as a restoring force for the measuring element 3 is used and acts on the control slide via a line 20 with a throttle 21.
Die Zumessung am Zumeßventil 7 erfolgt bei konstanter Druckdifferenz, die durch ein Differenzdruckventil 23 aufrechterhalten wird, das als Flachsitzventil mit einem festen Ventilsitz 24 und einer Membran 25 ausgebildet ist. Die Membran 25 trennt zwei Kammern 26 und 27. Die Kammer 26 steht über eine Leitung 28 mit dem Zumeßventil 7 in Verbindung. Aus der KAmmer 26 gelangt der zugemessene Kraftstoff über einen Kanal 29 in Richtung des Pfeiles 30 zu einem nicht dargestellten Mengentciler, der die Kraftstoffmenge auf die einzelnen in der Nähe der Motorzylinder im Saugrohr angeordneten Einspritzventile gleichmäßig verteilt. Das Differcnzdrückventil 23 wird in Öffnungsrichtung von einer Feder 31 belastet. In der durch die Membran 25 von der Kammer 26 getrennten Kammer 27 herrscht über eine Leitung 32 der Kraftstoffdruck vor der Zumessung. In der Kammer 27 ist ein Elektromagnetsystem 34 mit einem Tauchspulanker 35, einer Spule 36, einem Weicheisenkern 37, einem Permanentmagneten 38 und einer Weicheisenplatte 39 angeordnet. Die Weicheisenplatte 39 hat einen Kern 40, der in den an einer Blattfeder (Spinne) 41 aufgehängten Tauchspulanker 35 hineinragt. Die Verbindung zwischen der Blattfeder 41 und der Membran 25 stellt ein Zwischenteil 42 her.The metering at the metering valve 7 takes place at a constant pressure difference that is generated by a differential pressure valve 23 is maintained as a flat seat valve with a fixed valve seat 24 and a Membrane 25 is formed. The membrane 25 separates two chambers 26 and 27. The chamber 26 is standing Via a line 28 with the metering valve 7 in connection. From the chamber 26 comes the metered Fuel via a channel 29 in the direction of arrow 30 to a flow meter, not shown, which controls the amount of fuel placed on the individual in the vicinity of the engine cylinder in the intake manifold Injectors evenly distributed. The differential pressure valve 23 is loaded by a spring 31 in the opening direction. In the through the membrane 25 of The chamber 27, which is separate from the chamber 26, prevails via a line 32, the fuel pressure before the metering. In the chamber 27 there is an electromagnetic system 34 with a moving coil armature 35, a coil 36, a soft iron core 37, a permanent magnet 38 and a soft iron plate 39. The soft iron plate 39 has a core 40 which is suspended from a leaf spring (spider) 41 Moving coil armature 35 protrudes. The connection between the leaf spring 41 and the diaphragm 25 is established an intermediate part 42 ago.
Die Wirkungsweise der in Fig. 1 dargestellten Kraftstoffeinspritzanlage ist folgende:The mode of operation of the fuel injection system shown in Fig. 1 is as follows:
Bei laufender Brennkraftmaschine wird über das Saugrohr 1,4 und 5 Luft angesaugt, durch die das Meßorgan 3 eine gewisse Auslenkung aus seiner Ruhelage erfährt. Entsprechend der Auslenkung des Meßorgans 3 wird über den Hebel 8 auch der Steuerschieber 11 des Zumeßvcntils7 verschoben, der den Kraftstoff strom in der Leitung 14, 28 mehr od;r weniger drosselt. Die direkte Verbindung zwischen dem Mi-ßorgan 3 und dem Steuerschieber 11 ergibt ein konstantes Verhältnis von Luftmenge und zugemessener Kraftstoffmerge.When the internal combustion engine is running, air is sucked in via the intake manifold 1, 4 and 5, through which the Measuring element 3 experiences a certain deflection from its rest position. According to the deflection of the Measuring element 3 is also moved via the lever 8 of the control slide 11 of the Zumeßvcntils7, which the Fuel flow in line 14, 28 more or less throttles. The direct connection between the Mi-ßorgan 3 and the control slide 11 results in a constant ratio of air volume and metered fuel amount.
Um das Kraftstoff-Luft-Gemisch je nach dem Abschnit*. des Botriebsbcrciches. der Brennkraftmaschine reicher oder ärmer halten zu können, ist eine Änderung der an sich konstanten Druckdifferenz am Zumeßventil 7 in Abhängigkeit von Motorkenngrößen, z. B. vom Sauerstoffgehalt im Abgas erforderlich. Hierfür ist eine sogenannte Sauerstoffsonde geeignet, die in der Abgasleitung der Brennkraftmaschine angeordnet ist und über eine elektronische Schaltung die durch die Spule 36 des Elektromagnetsystems 34 fließende Stromstärke ändert. Dadurch wird der Tauchspulanker 35 mehr oder weniger durch die Magnetkraft zum Kern 40 hin gezogen, also in Richtung einer Entlastung der Feder 31. Die zugemessene Kraftstoffmenge ist also durch Änderung des Differenzdruckes am Zumeßventil 7 beeinflußbar, wobei die Rückmeldung durch die Ausgestaltung des Elektromagnetsystems 34 mit einem Tauchspulanker 35 und einem Permanentmagneten 38 hysteresefrei er-To adjust the fuel-air mixture depending on the section *. of the operating history. To be able to keep the internal combustion engine richer or poorer is a change the constant pressure difference at the metering valve 7 depending on engine parameters, e.g. B. required by the oxygen content in the exhaust gas. A so-called oxygen probe, which is arranged in the exhaust pipe of the internal combustion engine, is suitable for this is and via an electronic circuit that by the coil 36 of the electromagnetic system 34 flowing current changes. As a result, the moving coil armature 35 is more or less through the Magnetic force drawn towards the core 40, that is, in the direction of relieving the pressure on the spring 31. The measured The amount of fuel can therefore be influenced by changing the differential pressure at the metering valve 7, with the feedback through the design of the electromagnetic system 34 with a moving coil armature 35 and a permanent magnet 38 hysteresis-free
ic folgt. Das Differenzdruckventil 23 steuert eine nachgeschaltete nicht dargestellte Mengenteilereinrichtung vor.ic follows. The differential pressure valve 23 controls a downstream Flow divider device not shown before.
In F ί g. 2 sind die gegenüber der Fig. 1 gleichbleibenden Teile der Kraftstoffeinspritzanlage mit glei-In F ί g. 2 are the same as in FIG Parts of the fuel injection system with the same
is chen Bezugsziffern bezeichnet. Die Kraftstoffeinspritzanlage in F i g. 2 enthält ein Zumeß- und Mengenteilerventil 50, dem Kraftstoff aus der Leitung 14 durch einen Kanal 51 zugeführt wird. Aus dem Kanal 51 gelangt der Kraftstoff in eine Ringnut 52 des Steuerschiebers 11. Je nacn Stellung des Steuerschiebers 11 überdeckt die Ringnut 52 mehr oder weniger Steuerschlitze 53, die durch Kanäle 54 zu je einer Kammer 55 führen, die durch die Membran 56 von einer Kammer 57 getrennt ist. Aus den Kammern 55is designated reference numerals. The fuel injection system in Fig. 2 contains a metering and flow divider valve 50, to which fuel is supplied from line 14 through a channel 51. From the canal 51 the fuel enters an annular groove 52 of the control slide 11. Depending on the position of the control slide 11 covers the annular groove 52 more or less control slots 53, each through channels 54 to one Lead chamber 55, which is separated from a chamber 57 by the membrane 56. From chambers 55
S5 gelangt der Kraftstoff über Kanäle 58 zu den einzelnen nicht dargestellten Hinspritzventilen, die in der Nähe der Motorzylinder im Saugrohr angeordnet sind. Die Membran 56 dient als bewegliches Teil je eines als zweites Differenzdruckventil ausgebildeten Flachsitzventils. Von der Kraftstoffleitung 14 zweigt eine Leitung 60 mit einer Drossel 61 ab, die zu den Kammern 57 der einzelnen Differenzdruckventile führt. Der Kraftstoffdruck in den Kammern 57 ist durch das Differenzdruckventil 23 über die Leitung 28 änderbar, wobei der Kraftstoff aus der Kammer 26 des Differenzdruckventils 23 in Offenstellung des Ventils durch den Kanal 29 in den Kraftstoffbehälter 17 zurückfließen kann.S5, the fuel arrives at the individual via channels 58 injection valves, not shown, which are arranged in the vicinity of the engine cylinder in the intake manifold are. The membrane 56 serves as a movable part, one each designed as a second differential pressure valve Flat seat valve. From the fuel line 14 branches off a line 60 with a throttle 61, which leads to the Chambers 57 of the individual differential pressure valves leads. The fuel pressure in the chambers 57 is changeable by the differential pressure valve 23 via the line 28, the fuel from the chamber 26 of the differential pressure valve 23 in the open position of the valve through the channel 29 into the fuel tank 17 can flow back.
Die Wirkungsweise der in F i g. 2 dargestellten Kraftstoffeinspritzanlage entspricht im wesentlichen der in Fig. 1 beschriebenen Kraftstoffeinspritzanlage. Der am Differenzdruc.'iventil 23 durch das Elektromagnetsystem 34 in Abhängigkeit z. B. von dem Sauerstoffgehalt im Abgas der Brennkraftmaschine änderbare Druckabfall hat eine Modifiziening des Differenzdruckes an den zweiten Differenzdruckventilen 59 zur Folge. Da das Elektromagnetsystem 34 hysteresefrei arbeitet und in dem hydraulischen Kreis keine hysteresebehafteten Teile vorhanden sind, erfolgt die Rückmeldung fehlerfrei, d. h., auch bsi fehlerbehafteter Stellung des Meßorgans 3 wird die Nachführung durch das Signal der Sauerstoffsonde so vorgenommen, daß die Kraftstoffnachregelung fehlerfrei auf λ nahe 1 erfolgt. Dies ermöglicht es, die Anforderungen an das Meßorgan 3 zu senken und es kle.ner und billiger zu bauen. Das Meßorgan 3 übernimmt dann im wesentlichen die Vorwahl beim Übergang zwischen den einzelnen Beiriebsbereichen.The mode of operation of the in F i g. The fuel injection system shown in FIG. 2 corresponds essentially to the fuel injection system described in FIG. The valve on the differential pressure 23 through the electromagnetic system 34 depending on z. B. from the oxygen content in the exhaust gas of the internal combustion engine changeable pressure drop results in a modification of the differential pressure at the second differential pressure valves 59. Since the electromagnetic system 34 works hysteresis-free and there are no parts subject to hysteresis in the hydraulic circuit, the feedback is error-free, i.e. even if the measuring element 3 is in an incorrect position, the signal from the oxygen sensor is used to track the fuel in such a way that the fuel readjustment to λ close to 1 is error-free he follows. This makes it possible to lower the demands on the measuring element 3 and to build it smaller and cheaper. The measuring element 3 then essentially takes over the preselection during the transition between the individual operating areas.
Hierzu 1 Blau ZeichnungenFor this 1 blue drawings
Claims (4)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2203018A DE2203018C3 (en) | 1972-01-22 | 1972-01-22 | Fuel injection system |
GB280973A GB1418932A (en) | 1972-01-22 | 1973-01-19 | Fuel injection systems |
BR73461A BR7300461D0 (en) | 1972-01-22 | 1973-01-19 | FUEL INJECTOR DEVICE |
SE7300780A SE376949B (en) | 1972-01-22 | 1973-01-19 | |
US00325743A US3809036A (en) | 1972-01-22 | 1973-01-22 | Fuel injection apparatus |
JP942973A JPS5538496B2 (en) | 1972-01-22 | 1973-01-22 | |
FR7302142A FR2169126B1 (en) | 1972-01-22 | 1973-01-22 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2203018A DE2203018C3 (en) | 1972-01-22 | 1972-01-22 | Fuel injection system |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2203018A1 DE2203018A1 (en) | 1973-07-26 |
DE2203018B2 DE2203018B2 (en) | 1974-04-25 |
DE2203018C3 true DE2203018C3 (en) | 1974-11-28 |
Family
ID=5833724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2203018A Expired DE2203018C3 (en) | 1972-01-22 | 1972-01-22 | Fuel injection system |
Country Status (7)
Country | Link |
---|---|
US (1) | US3809036A (en) |
JP (1) | JPS5538496B2 (en) |
BR (1) | BR7300461D0 (en) |
DE (1) | DE2203018C3 (en) |
FR (1) | FR2169126B1 (en) |
GB (1) | GB1418932A (en) |
SE (1) | SE376949B (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2333451A1 (en) * | 1973-06-30 | 1975-01-23 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM FOR MIXED COMPRESSING, EXTERNAL IGNITION STRATIFIC CHARGE COMBUSTION MACHINES |
DE2339370B2 (en) * | 1973-08-03 | 1978-04-27 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system for mixture-compressing spark-ignited internal combustion engines |
DE2349631C2 (en) * | 1973-10-03 | 1984-10-04 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system |
DE2349616B2 (en) * | 1973-10-03 | 1977-12-08 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION SYSTEM FOR COMBUSTION ENGINES |
DE2349688C3 (en) * | 1973-10-03 | 1980-07-17 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system |
US3963005A (en) * | 1973-10-12 | 1976-06-15 | Robert Bosch G.M.B.H. | Fuel supply system |
DE2412808A1 (en) * | 1974-03-16 | 1975-09-25 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM |
DE2515195C2 (en) * | 1975-04-08 | 1981-11-19 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system |
DE2529701A1 (en) * | 1975-07-03 | 1977-01-27 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM |
US3977382A (en) * | 1975-09-15 | 1976-08-31 | Borg-Warner Corporation | Fuel regulator |
JPS5244336A (en) * | 1975-10-07 | 1977-04-07 | Nippon Soken Inc | Fuel control device used for an internal combustion engine |
DE2607366A1 (en) * | 1976-02-24 | 1977-09-01 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM |
DE2644051C3 (en) * | 1976-09-30 | 1980-05-08 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Fuel injection system for mixture-compressing, externally ignited internal combustion engines |
JPS53152651U (en) * | 1977-05-07 | 1978-12-01 | ||
JPS53134116A (en) * | 1977-04-27 | 1978-11-22 | Toyota Motor Corp | Fuel feeder for internal combustion engine |
GB2001129B (en) * | 1977-07-12 | 1982-08-04 | Ntn Toyo Bearing Co Ltd | FUEL FEEDING APPARATUS FOR air fuel combustion mixture |
JPS5420222A (en) * | 1977-07-15 | 1979-02-15 | Toyota Motor Corp | Fuel-supplying device for internal combustion engine |
US4150645A (en) * | 1977-08-19 | 1979-04-24 | Colt Industries Operating Corp. | Circuit means and apparatus for controlling the air-fuel ratio supplied to a combustion engine |
JPS5438440A (en) * | 1977-08-30 | 1979-03-23 | Toyota Motor Corp | Air fuel ratio controller for internal combustion engine fuel feeder |
JPS5438441A (en) * | 1977-08-30 | 1979-03-23 | Toyota Motor Corp | Air fuel ratio controller for internal combustion engine fuel feeder |
DE2906597A1 (en) * | 1979-02-21 | 1980-08-28 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM |
DE2933052A1 (en) * | 1979-08-16 | 1981-03-26 | Robert Bosch Gmbh, 70469 Stuttgart | FUEL INJECTION SYSTEM |
DE2950599A1 (en) * | 1979-12-15 | 1981-06-19 | Robert Bosch Gmbh, 7000 Stuttgart | VALVE |
DE3002458A1 (en) * | 1980-01-24 | 1981-07-30 | Robert Bosch Gmbh, 7000 Stuttgart | METERING AND QUANTITY DIVIDER VALVE |
DE3006586A1 (en) * | 1980-02-22 | 1981-09-03 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION SYSTEM |
GB9104455D0 (en) * | 1991-03-02 | 1991-04-17 | Riley Peter | A chair |
US7210396B2 (en) * | 2005-08-31 | 2007-05-01 | Caterpillar Inc | Valve having a hysteretic filtered actuation command |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3703888A (en) * | 1969-12-01 | 1972-11-28 | Bosch Gmbh Robert | Device for the fuel quantity control in response to operational variables of an internal combustion engine |
DE2062078C3 (en) * | 1970-12-17 | 1978-04-06 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection system for mixture-compressing spark-ignited internal combustion engines |
US3783341A (en) * | 1970-08-24 | 1974-01-01 | R Beckwith | Phase condition indicating circuit |
DE2054911A1 (en) * | 1970-11-07 | 1972-05-10 | Robert Bosch Gmbh, 7000 Stuttgart | Control element for a fuel injection system |
-
1972
- 1972-01-22 DE DE2203018A patent/DE2203018C3/en not_active Expired
-
1973
- 1973-01-19 GB GB280973A patent/GB1418932A/en not_active Expired
- 1973-01-19 SE SE7300780A patent/SE376949B/xx unknown
- 1973-01-19 BR BR73461A patent/BR7300461D0/en unknown
- 1973-01-22 US US00325743A patent/US3809036A/en not_active Expired - Lifetime
- 1973-01-22 JP JP942973A patent/JPS5538496B2/ja not_active Expired
- 1973-01-22 FR FR7302142A patent/FR2169126B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2203018A1 (en) | 1973-07-26 |
FR2169126A1 (en) | 1973-09-07 |
SE376949B (en) | 1975-06-16 |
DE2203018B2 (en) | 1974-04-25 |
BR7300461D0 (en) | 1973-09-18 |
JPS4883220A (en) | 1973-11-06 |
US3809036A (en) | 1974-05-07 |
JPS5538496B2 (en) | 1980-10-04 |
FR2169126B1 (en) | 1977-12-30 |
GB1418932A (en) | 1975-12-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |