CN1068654C - Fuel injection pump for internal combustion - Google Patents
Fuel injection pump for internal combustion Download PDFInfo
- Publication number
- CN1068654C CN1068654C CN95104048A CN95104048A CN1068654C CN 1068654 C CN1068654 C CN 1068654C CN 95104048 A CN95104048 A CN 95104048A CN 95104048 A CN95104048 A CN 95104048A CN 1068654 C CN1068654 C CN 1068654C
- Authority
- CN
- China
- Prior art keywords
- face
- fuel
- injection pump
- room
- work
- 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 - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 title claims description 7
- 239000000446 fuel Substances 0.000 title abstract description 4
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure fuel-injection
-
- 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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
- F02M41/128—Varying injection timing by angular adjustment of the face-cam or the rollers support
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Abstract
In order to adjust the commencement of fuel injection, a fuel-injection adjusting device is provided with an adjusting piston (10). A working chamber (15) is delimited by the adjusting piston in a cylinder (12) and is closed by a cover (21). The working chamber (15) is acted upon by a hydraulic pressure fluid. A sealing ring (25) is inserted between the cover (21) and the cylinder (12) and is protected against cavitation damage by axial blind bores (27) in the cover (21).
Description
The present invention relates to the fuel-injection pump that a kind of internal-combustion engine is used.
For this from the Robert. ripple is permitted known fuel-injection pump in the house organ " VerteilereinspritzPumpe TYPVE, 1,987 722 014, KH/VDT-03.88 ", and it has adopted the seal ring of rounded cross section.At this moment, for seal ring, will in fuel-injection pump rotates, bear in the work-room of pilot pressure because of the pressure oscillation that causes load exchange and causing cavitation damage.
The object of the present invention is to provide a kind of fuel injection pump for internal combustion, this fuel-injection pump can be avoided in the work-room of pilot pressure in bearing the fuel-injection pump operation process, by the seal ring cavitation damage that causes pressure oscillation to cause with the load exchange.
According to the present invention, jet pump is produced in the combustion that provides a kind of internal-combustion engine to use, wherein: have to driving at least 1 pump plug and be provided with cam driving gear; This cam driving gear can be adjusted by the movably adjustment piston that is provided with in oil cylinder for adjusting the injection beginning time, and forms the work-room of being pressed feed fluid by certain control in the oil cylinder that has its end face of adjusting piston; The adjustment piston is resisted helical spring power by this liquid and is regulated, and the opposing party of work-room is made of the closed portion of closing oil cylinder, and at this closed portion be adjacent between its end face of cylinder wall, opening wide towards work-room and closed portion, embedded seal ring is under the form that compresses in the annular ditch groove in aforementioned end face, in the work-room side end face of closed portion, inboard in abutting connection with a plurality of otch of ground configuration in the seal ring radial direction.
Adopt fuel-injection pump of the present invention, then can avoid cavitation damage.By set hole, make the internal rupture of the bubble that taken place in the pilot pressure liquid shift in the aforementioned apertures, thereby the protection seal ring is not subjected to cavitation damage.
Fig. 1 is the phantom of fuel-injection pump.
Among the figure, 1-roller retaining ring, 2-annular element, 3-pump case, the 4-circular groove, 5-otch, 6-roller, 7-live axle, the 9-adjusting pin, the 10-servopiston, 11-sprays regulating device, 12-oil cylinder, the 14-end face, 15-work-room, 16-end face, 18-helical spring, the 19-lid, 21-lid, 22-hole, 23-end face, the 25-seal ring, 26-groove, 27-tube hole, 28-end face.
One embodiment of the present of invention are described below.
Accompanying drawing is the phantom of fuel-injection pump.This fuel-injection pump is the sort of distribution type jet pump of being put down in writing in the publication described at the very start of this specification.This distribution type jet pump has the pump plug, and this pump plug is in order to carry out the pumping campaign, and simultaneously, this pump plug drives by the cam plectane that has camming surface towards axle direction in order to carry out rotation motion by its dispensing device.This camming surface is remained on the roller retaining ring 1 by elastic force, and this roller retaining ring is represented with the planimetric map of the jet pump of distribution type shown in figure section.This roller retaining ring is provided with annular element 2, and this annular element is bearing in the basin shape otch of pump case 3, and it has circular contour.The roller 6 that is bearing in the otch 5 of the circular groove 4 of roller retaining ring 1 and end face side is a supporting body with the camming surface of cam plectane, and the cam plectane turns round driving by the live axle that runs through 7 that cooperates with roller retaining ring 1 center.Rotating camming surface makes the pump plug that is linked to the cam plectane produce reciprocal pumping campaign on roller.
Change corresponding to the pump plug discharge time of live axle rotary position or the elapsed time of stroke by above-mentioned roller retaining ring.For reaching this purpose, in roller retaining ring 1, be provided with from this roller retaining ring to the outstanding adjusting pin 9 of radial direction.Adjusting pin is attached on the servopiston 10 that sprays regulating device 11 for the injection beginning time of adjusting jet pump this moment, at this moment, servopiston 10 is configured in the oil cylinder 12 movably, and on an one end face 14, form work-room 15,16 of another end faces on the other side bear the elastic force that is produced by helical spring 18, and this helical spring the other end is bearing on the lid 19 of the side of closing oil cylinder one side.The chamber that forms between servopiston 10 and lid 19 does not promptly have pressure in the spring chamber.Relative therewith, work-room 15 is still being closed with lid 21 at opposite side, in this work-room, by hole 22 in the servopiston 10, that dwindle, press fueling by certain control, this control is pressed with the increase of common form with the revolution revolution and is raise, in view of the above, the power that servopiston 10 is increased along with the revolution revolution and overcome spring 18 moves, thereby is increased and to the acceleration direction adjustment injection beginning time along with the revolution revolution.
For sealing operation chamber 15, at lid 21 and the perisporium that centers on oil cylinder 12, in abutting connection with embedding seal ring 25 between the end face 23 of lid 21.The sealing circle is made into so-called O shape ring, make the ring of the circular cross section that is made of elastic material in case of necessity, and it embeds in the groove of end face 23.This groove is towards the side of lid 21, and opens to work-room to the inside at radial direction.
In above-mentioned lid 21, be provided with towards axial tube hole 27, these holes are parallel to the oil cylinder axis from lid inner side end 28 and extend.These holes equally spaced are distributed in the radial direction inboard, are adjacent to week in the seal ring and dispose.In a preferable embodiment, be provided with 4 such tube holes.The aperture and the degree of depth in these holes are selected like this: any cavitation damage does not consequently take place in these hole internal ruptures in the bubble that produces in work-room 15 internal pressure liquid during the load exchange in seal ring.The internal rupture of this bubble is carried out near wall regularly, and being flowing in the tranquilization scope of pressured fluid carried out.This situation is prepared out by above-mentioned hole.
The present invention is illustrated to the injection beginning time adjusting device of the distribution type jet pump that has reciprocating piston, but, adjusting with the injection beginning time of this form of servopiston also can be the distribution type pump of other structural type, for example radial piston pump.This pump also can be implemented the present invention.
Claims (4)
1. the fuel-injection pump that internal-combustion engine is used is characterized in that: have to driving at least 1 pump plug and be provided with cam driving gear (1); This cam driving gear is for adjusting the injection beginning time, can adjust by the movably adjustment piston (10) that in oil cylinder (12), is provided with, and in the oil cylinder that has its end face (14) (12) of adjusting piston (10), form the work-room of pressing feed fluid by certain control; Adjusting piston regulates by the power of this liquid opposing helical spring (18), and the opposing party of work-room (15) is made of the closed portion of closing oil cylinder (12) (lid 21), and at this closed portion (21) be adjacent between the end face (23) of its cylinder wall, opening wide towards work-room (15) and closed portion (21), seal ring (25) embedded in the annular ditch groove (26) in aforementioned end face (23) is under the form that compresses, in work-room (15) side end face (23) of closed portion (21), inboard in abutting connection with ground configuration a plurality of otch (27) in seal ring (25) radial direction.
2. fuel-injection pump according to claim 1 is characterized in that: otch (27) uniformly-spaced disposed along interior week of seal ring (25).
3. fuel-injection pump according to claim 2 is characterized in that: otch is made of the tube hole (27) of extending perpendicular to the end face of closed portion (21).
4. according to one of any described fuel-injection pump of claim 1 to 3, it is characterized in that: number of incisions is 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4407617A DE4407617B4 (en) | 1994-03-08 | 1994-03-08 | Fuel injection pump for internal combustion engines |
| DEP4407617.7 | 1994-03-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120630A CN1120630A (en) | 1996-04-17 |
| CN1068654C true CN1068654C (en) | 2001-07-18 |
Family
ID=6512116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104048A Expired - Lifetime CN1068654C (en) | 1994-03-08 | 1995-03-08 | Fuel injection pump for internal combustion |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH07259583A (en) |
| KR (1) | KR100365631B1 (en) |
| CN (1) | CN1068654C (en) |
| DE (1) | DE4407617B4 (en) |
| FR (1) | FR2717226B1 (en) |
| GB (1) | GB2287511B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377851A2 (en) * | 1989-01-07 | 1990-07-18 | Robert Bosch Gmbh | Distributor-type fuel injection pump for internal-combustion engines |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861833A (en) * | 1973-02-28 | 1975-01-21 | Stanadyne Inc | Fuel injection pump |
| DE2909456A1 (en) * | 1979-03-10 | 1980-09-18 | Bosch Gmbh Robert | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
| DE2930499A1 (en) * | 1979-07-27 | 1981-02-12 | Bosch Gmbh Robert | Fuel injection pump for diesel engine - has annular groove round discharge valve seat to reduce cavitation in fuel |
| JPS5786533A (en) * | 1980-11-15 | 1982-05-29 | Diesel Kiki Co Ltd | Regulating device of injection timing in distributor type fuel injection pump |
| DE3512019A1 (en) * | 1985-04-02 | 1986-10-02 | Robert Bosch Gmbh, 7000 Stuttgart | FUEL INJECTION PUMP |
-
1994
- 1994-03-08 DE DE4407617A patent/DE4407617B4/en not_active Expired - Lifetime
-
1995
- 1995-02-08 FR FR9501446A patent/FR2717226B1/en not_active Expired - Lifetime
- 1995-02-27 GB GB9503912A patent/GB2287511B/en not_active Expired - Lifetime
- 1995-03-06 JP JP7045872A patent/JPH07259583A/en active Pending
- 1995-03-07 KR KR1019950004567A patent/KR100365631B1/en not_active IP Right Cessation
- 1995-03-08 CN CN95104048A patent/CN1068654C/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377851A2 (en) * | 1989-01-07 | 1990-07-18 | Robert Bosch Gmbh | Distributor-type fuel injection pump for internal-combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2287511B (en) | 1997-12-24 |
| FR2717226A1 (en) | 1995-09-15 |
| JPH07259583A (en) | 1995-10-09 |
| CN1120630A (en) | 1996-04-17 |
| KR100365631B1 (en) | 2003-02-25 |
| FR2717226B1 (en) | 1997-01-10 |
| KR950033063A (en) | 1995-12-22 |
| DE4407617B4 (en) | 2010-08-12 |
| DE4407617A1 (en) | 1995-09-14 |
| GB2287511A (en) | 1995-09-20 |
| GB9503912D0 (en) | 1995-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150308 Granted publication date: 20010718 |