ATE21729T1 - DEVICE FOR INJECTING FUEL INTO AN INTERNAL COMBUSTION ENGINE. - Google Patents
DEVICE FOR INJECTING FUEL INTO AN INTERNAL COMBUSTION ENGINE.Info
- Publication number
- ATE21729T1 ATE21729T1 AT81401902T AT81401902T ATE21729T1 AT E21729 T1 ATE21729 T1 AT E21729T1 AT 81401902 T AT81401902 T AT 81401902T AT 81401902 T AT81401902 T AT 81401902T AT E21729 T1 ATE21729 T1 AT E21729T1
- Authority
- AT
- Austria
- Prior art keywords
- chamber
- pressure
- control
- injection
- subjected
- Prior art date
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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/025—Hydraulically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
1. A fuel injection arrangement for an internal combustion engine comprising : an injection chamber (5) which is closed by a needle subjected to the force of a closure spring and the pressure in a discharge chamber (9) ; a control system (12) having two differential pistons which are fixed with respect to each other and comprising : - a delivery piston (13) delimiting a metering chamber (14) communicating with the injection chamber (5) and supplied with fuel at an intermediate feed pressure ; - a control piston (16) which is larger in section than the delivery piston (13), delimiting a control chamber (17) which can be subjected to a high control pressure by means of a three-way electrically operated valve system ; and - control means for discharging the discharge chamber (9) when the metered amount of fuel has been subjected to the injection pressure by the action of the high control pressure on the control piston (16) ; the dimensions of said discharge chamber (9) and the characteristics of the injector (1) being such that prior to injection the needle (2) remains in the closure position, when the injection chamber (5) is at the injection pressure obtaining in the metering chamber (14), the high control pressure being applied to the control piston (16) and the discharge chamber (9) being subjected to the control pressure ; the section (Sd ) of the discharge chamber (9) where the control pressure occurs and the closure spring (10) of the injector being such that the forces which result therefrom tending to hold the needle in the closure position are greater thant the force tending to open the needle and resulting from the action of the injection pressure in the metering chamber (14), the arrangement being characterised in that the control means for discharging the discharge chamber (9) comprise a sliding spool-type distributor (51) which is pilot-controlled by the high control pressure and by the pressure obtaining in the metering chamber (14) and that the spool of the distributor (51) is subjected on the one hand to the action of the high control pressure obtaining in a first pilot-control chamber (58) and on the other hand to the action of the pressure obtaining in a second pilot-control chamber (59), the second chamber communicating with a lower passage (66) opening into the metering chamber (14) and being capable of being closed by the delivery piston (13) and with an upper passage (67) communicating with the low pressure of the tank and being capable of being closed by the delivery piston (13), on of the said two passages being opened irrespective of the position of the delivery piston (13).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8100679A FR2497876B1 (en) | 1981-01-15 | 1981-01-15 | FUEL INJECTION DEVICE AND METHOD FOR AN INTERNAL COMBUSTION ENGINE |
| EP81401902A EP0056916B1 (en) | 1981-01-15 | 1981-12-01 | Device for fuel injection for an internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE21729T1 true ATE21729T1 (en) | 1986-09-15 |
Family
ID=9254174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT81401902T ATE21729T1 (en) | 1981-01-15 | 1981-12-01 | DEVICE FOR INJECTING FUEL INTO AN INTERNAL COMBUSTION ENGINE. |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0056916B1 (en) |
| AT (1) | ATE21729T1 (en) |
| DE (1) | DE3175234D1 (en) |
| FR (1) | FR2497876B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2541379B1 (en) * | 1983-02-21 | 1987-06-12 | Renault | IMPROVEMENT IN ELECTROMAGNETICALLY CONTROLLED INJECTION SYSTEMS FOR A PRESSURE-TIME DIESEL ENGINE WHERE THE INJECTOR NEEDLE IS DRIVEN BY THE DISCHARGE THEN LOADING A CAPACITY |
| US6575137B2 (en) | 1994-07-29 | 2003-06-10 | Caterpillar Inc | Piston and barrel assembly with stepped top and hydraulically-actuated fuel injector utilizing same |
| DE19910970A1 (en) * | 1999-03-12 | 2000-09-28 | Bosch Gmbh Robert | Fuel injector |
| DE19939428A1 (en) * | 1999-08-20 | 2001-03-01 | Bosch Gmbh Robert | Method and device for performing a fuel injection |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2126777A1 (en) * | 1971-05-28 | 1972-12-14 | Bosch Gmbh Robert | Pump nozzle for fuel injection for internal combustion engines |
| DE2126787C3 (en) * | 1971-05-28 | 1980-01-24 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection device for internal combustion engines |
| US3983855A (en) * | 1973-07-12 | 1976-10-05 | C.A.V. Limited | Fuel injection system |
| DE2558789A1 (en) * | 1975-12-24 | 1977-07-14 | Bosch Gmbh Robert | HIGH PRESSURE FUEL INJECTION DEVICE FOR DIESEL ENGINES |
| JPS53109021A (en) * | 1977-03-07 | 1978-09-22 | Nippon Denso Co Ltd | Fuel injection device for internal combustion engine |
| DE2759187A1 (en) * | 1977-12-31 | 1979-07-12 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM WITH AT LEAST ONE FUEL INJECTION VALVE, ESPECIALLY FOR LARGE ENGINES |
| DE3000960A1 (en) * | 1980-01-12 | 1981-09-10 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES, ESPECIALLY FOR DIESEL ENGINES |
-
1981
- 1981-01-15 FR FR8100679A patent/FR2497876B1/en not_active Expired
- 1981-12-01 EP EP81401902A patent/EP0056916B1/en not_active Expired
- 1981-12-01 AT AT81401902T patent/ATE21729T1/en not_active IP Right Cessation
- 1981-12-01 DE DE8181401902T patent/DE3175234D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2497876B1 (en) | 1986-02-07 |
| DE3175234D1 (en) | 1986-10-02 |
| FR2497876A1 (en) | 1982-07-16 |
| EP0056916A1 (en) | 1982-08-04 |
| EP0056916B1 (en) | 1986-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UEP | Publication of translation of european patent specification | ||
| EELA | Cancelled due to lapse of time |