EP0713968A1 - Rail d'injection de combustible avec espace collecteur de bulles de vapeur - Google Patents
Rail d'injection de combustible avec espace collecteur de bulles de vapeur Download PDFInfo
- Publication number
- EP0713968A1 EP0713968A1 EP95115187A EP95115187A EP0713968A1 EP 0713968 A1 EP0713968 A1 EP 0713968A1 EP 95115187 A EP95115187 A EP 95115187A EP 95115187 A EP95115187 A EP 95115187A EP 0713968 A1 EP0713968 A1 EP 0713968A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- injection
- collecting space
- line
- rack
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 40
- 239000007924 injection Substances 0.000 title claims abstract description 40
- 239000000446 fuel Substances 0.000 title claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
Definitions
- the invention relates to a fuel injection rail of an internal combustion engine, which is connected to a collecting space for fuel vapor bubbles, which is connected via a line section to a fuel supply line.
- a fuel injection rail for a return-free fuel supply system in particular a mixture-compressing internal combustion engine
- EP 0 593 053 A1 is known from EP 0 593 053 A1.
- the vapor bubbles are to get into the collecting space via the line section branching off from the fuel supply line and are later to be fed again in small doses to the injection valves branching off from the injection rail via the other connection between the collecting space and the injection rail.
- the invention Since in this known device, in particular, the removal of the fuel vapor bubbles accumulated in the collecting space has proven to be problematic, the invention has set itself the task of showing improvements in this regard. To solve this problem it is provided that the line section branching off from the collecting space is like an ejector pump opens into the fuel supply line. Advantageous training and further education are included in the subclaims.
- a fuel injection bar designated as a whole by 1, supplies, as usual, a plurality of fuel injection valves 2 of a mixture-compressing internal combustion engine. Fuel is supplied to this injection bar 1 via a fuel feed line 3; a return line which was still customary in the past is not provided in the injection bar 1 described here.
- the injection bar 1 is connected to a collecting space 4 for fuel vapor bubbles.
- this collecting space 4 which is preferably geodetically located above the injection bar 1, the fuel vapor bubbles which are formed will separate out automatically.
- the collecting space 4 can thus be emptied continuously in an elegant manner, with the result that the fuel located in the collecting space - Steam bubbles can be dissolved and removed.
- the vapor bubbles can be removed directly via the line section designed in the manner of a suction jet pump, but in fact these vapor bubbles are largely broken down by the ability of the fuel to absorb both air and evaporated fuel to a certain degree. Since fresh fuel always reaches the collecting space 4 via the injection bar 1, there is a relatively large transition area between the vapor bubbles and the liquid fuel, so that the vapor bubbles can be largely absorbed.
- no gaseous fuel is drawn off in the present injection rail, but rather liquid fuel saturated with vapor bubbles. The gas components in this liquid fuel, which is saturated with vapor bubbles, are so low that no combustion problems can occur.
- the inlet openings of the injection valves 2 are geodetically as deep as possible with respect to the injection bar 1, in order to prevent direct suction of vapor bubbles and the associated mixture formation or combustion problems.
- a suitably dimensioned metering nozzle 6 can be provided in the line section 5. Furthermore, an atomizing grille 7 can be provided in the feed line 3 downstream of the mouth of the line section 5, on which possibly entrained vapor bubbles which have been removed from the collecting space 4 are comminuted or dissolved. This atomizing grille 7 thus prevents, when the internal combustion engine is running, that impermissibly large steam bubbles can get into the injection valves 2.
- the collecting space 4 is located essentially geodetically above the actual injection bar section that supplies the injection valves 2, in order to ensure that the vapor bubbles actually do because of their lower specific weight get into this collecting room 4.
- the collecting space 4 is designed as a separate volume in the end region of the injection strip 1 opposite the inlet line 3, in the exemplary embodiment according to FIG. 2 the collecting space 4 is structurally combined with the injection strip 1. Only a partition 9 provided with through openings 8 separates the collecting space 4 from the so-called supply section 1a.
- the passage openings 8 are located in the partition 9 substantially directly above the branch points of the individual injection valves 2, however this and other details, in particular of a constructive nature, can be designed quite differently from the exemplary embodiments shown, without leaving the content of the patent claims.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4441858 | 1994-11-24 | ||
DE4441858 | 1994-11-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0713968A1 true EP0713968A1 (fr) | 1996-05-29 |
EP0713968B1 EP0713968B1 (fr) | 1998-12-30 |
Family
ID=6534055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95115187A Expired - Lifetime EP0713968B1 (fr) | 1994-11-24 | 1995-09-27 | Rail d'injection de combustible avec espace collecteur de bulles de vapeur |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0713968B1 (fr) |
DE (1) | DE59504683D1 (fr) |
ES (1) | ES2126827T3 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10137315A1 (de) | 2001-07-31 | 2003-02-20 | Volkswagen Ag | Schaltungsanordnung und Verfahren zur Regelung einer elektrischen Kraftstoffpumpe in einem rücklauffreien Kraftstoff-Fördersystem |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3132432A1 (de) * | 1981-08-17 | 1983-02-24 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzanlage |
DE3326408A1 (de) * | 1982-08-23 | 1984-02-23 | General Motors Corp., Detroit, Mich. | Montagegestell fuer kraftstoffeinspritzeinrichtungen von brennkraftmaschinen |
US4732131A (en) * | 1986-08-26 | 1988-03-22 | Brunswick Corporation | Fuel line purging device |
US4966120A (en) * | 1987-07-29 | 1990-10-30 | Aisan Kogyo Kabushiki Kaisha | Fuel injection system assembly |
DE4030490A1 (de) * | 1989-09-29 | 1991-04-11 | Nippon Denso Co | Vorrichtung zur kraftstoffzufuhr bei einer mehrzylinder-brennkraftmaschine |
EP0512235A1 (fr) * | 1991-05-08 | 1992-11-11 | Robert Bosch Gmbh | Distributeur de combustible |
EP0593053A1 (fr) | 1992-10-15 | 1994-04-20 | Nippondenso Co., Ltd. | Système d'alimentation en combustible pour moteurs à combustion interne |
-
1995
- 1995-09-27 EP EP95115187A patent/EP0713968B1/fr not_active Expired - Lifetime
- 1995-09-27 ES ES95115187T patent/ES2126827T3/es not_active Expired - Lifetime
- 1995-09-27 DE DE59504683T patent/DE59504683D1/de not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3132432A1 (de) * | 1981-08-17 | 1983-02-24 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzanlage |
DE3326408A1 (de) * | 1982-08-23 | 1984-02-23 | General Motors Corp., Detroit, Mich. | Montagegestell fuer kraftstoffeinspritzeinrichtungen von brennkraftmaschinen |
US4732131A (en) * | 1986-08-26 | 1988-03-22 | Brunswick Corporation | Fuel line purging device |
US4966120A (en) * | 1987-07-29 | 1990-10-30 | Aisan Kogyo Kabushiki Kaisha | Fuel injection system assembly |
DE4030490A1 (de) * | 1989-09-29 | 1991-04-11 | Nippon Denso Co | Vorrichtung zur kraftstoffzufuhr bei einer mehrzylinder-brennkraftmaschine |
EP0512235A1 (fr) * | 1991-05-08 | 1992-11-11 | Robert Bosch Gmbh | Distributeur de combustible |
EP0593053A1 (fr) | 1992-10-15 | 1994-04-20 | Nippondenso Co., Ltd. | Système d'alimentation en combustible pour moteurs à combustion interne |
Also Published As
Publication number | Publication date |
---|---|
DE59504683D1 (de) | 1999-02-11 |
ES2126827T3 (es) | 1999-04-01 |
EP0713968B1 (fr) | 1998-12-30 |
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