EP1247983B1 - Pompe à piston pour systèmes hydrauliques - Google Patents
Pompe à piston pour systèmes hydrauliques Download PDFInfo
- Publication number
- EP1247983B1 EP1247983B1 EP01108795A EP01108795A EP1247983B1 EP 1247983 B1 EP1247983 B1 EP 1247983B1 EP 01108795 A EP01108795 A EP 01108795A EP 01108795 A EP01108795 A EP 01108795A EP 1247983 B1 EP1247983 B1 EP 1247983B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pump
- pressure control
- return valve
- piston pump
- 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
- 239000000314 lubricant Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 11
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/16—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by adjusting the capacity of dead spaces of working chambers
Definitions
- the invention relates to a piston pump according to the preamble of claim 1.
- Such a piston pump is known from FR 2 157 546 A.
- a variable valve control for reciprocating internal combustion engines is known from EP 1 046 793.
- the lubricant flow generated by the existing lubricant pump is used to actuate a located at the end of the camshaft between the drive wheel and camshaft adjustment, which in turn causes a phase shift of the camshaft.
- the said adjusting devices are usually supplied by bores in the camshaft, wherein the control of the lubricant flow is generally carried out by solenoid valves.
- This known device has the disadvantage that at low speeds of the reciprocating internal combustion engine, the lubricant quantity is indeed sufficient, but the lubricant pressure is usually too low to operate the adjustment or the operation is too slow.
- This known disadvantage has been compensated by the fact that a lubricant pump with increased delivery capacity is installed. However, this leads to very high power consumption of the pump at higher speeds of the reciprocating internal combustion engine, which is undesirable because it reduces the efficiency.
- two-stage or variable pumps are used which provide sufficient lubricant pressure at low speeds but not so high power consumption at high speeds. However, these pumps are very expensive.
- Another pump is known from EP 0 976 926. It serves to a liquid medium z. B. to promote fuel and / or to increase the pressure.
- a cam directly or by means of push rod drives a piston which can move up and down in a cylindrical bore.
- the fluid flows through the outlet channel, while at the same time passes through a check valve liquid on the second side of the piston.
- the cylinder head of a reciprocating internal combustion engine includes at least one camshaft provided with a known camshaft adjusting device.
- the cylinder head contains a housing in which housed the items of the booster pump are.
- This housing can be an integral part of the cylinder head or mounted as a separate part suitable.
- a transfer piston which is driven in a known manner directly or by means of plunger of an existing cam of the engine valve control or advantageously by an additional located on the camshaft cam.
- the transfer piston is designed as a hollow part with a transverse to the cam end fluid drain and pressure equalization hole. The transfer piston is closed on the cam side and bears against the camshaft, while the opposite end is open.
- the open end of the transfer piston is closed by the pressure control piston, which in turn is pressed by the pressure control piston spring against an inserted into a groove in the transfer piston circlip.
- Other components of the pump are also a compression spring, the transfer piston in a known manner non-positively on the cam and one to two check valves.
- the non-return valve held in an advantageous embodiment of the compression spring opens during the suction stroke to the inlet channel integrated into the housing while the laterally attached second check valve releases liquid into the pressure channel upon reaching the desired delivery pressure.
- FIG. 1 shows a vertical section of a piston pump 1 according to the invention. It can be seen that the piston pump 1 is mounted in a housing 3, which in turn is connected to the cylinder head 2 of a reciprocating internal combustion engine. Also shown is a camshaft 4, which is mounted in the cylinder head 3 in a known manner.
- the housing 3 includes a fluid inlet channel 5, which is lubricated in a known manner during operation of a reciprocating internal combustion engine, a fluid drain channel or delivery channel 6 and a bore 7, which receives the components of the booster pump or a sleeve 17 (including the booster pump, shown here) ,
- a transfer piston 8 is mounted displaceably, wherein in the transfer piston 8 a likewise displaceably mounted pressure control piston 9 and a pressure control spring 10, both held by a locking ring 11, are arranged.
- the transfer piston 8 in turn, is pressed by a second pressure spring 13 against the cam of the camshaft 4 via a disk 12, so that a permanent frictional contact between transfer piston and cam is ensured.
- the spring strength of the compression spring should be as low as possible in order to keep the required drive power for the pump low.
- the compression spring 13 additionally holds a check valve 14 in position.
- the transfer piston 8 (containing the pressure control spring 10 and the Pressure control piston 9 secured by the locking ring 11), the disc 12, the compression spring 13 and the inlet check valve 14 mounted in a sleeve 17 and secured by a second locking ring 18, wherein the sleeve 17 is opened on the camshaft side for receiving the transfer piston 8 and on the lubricant inlet side has a sufficiently large bore for filling the pump through the inlet check valve 14.
- the existing lubricant pump delivers lubricant into the inlet channel 5 of the booster pump.
- the check valve 14 Through the check valve 14, the lubricant passes into the displacement chamber 16 formed by the space between the transfer piston 8, bore 7, the inlet check valve 14 and the outlet check valve 15. Now rotates the camshaft 4 from the position shown in Fig. 1 by 90 ° in the by the arrow marked direction of rotation of the transfer piston 8 in the bore 7 and the sleeve 17 is pressed in the direction of the inlet channel 5.
- the inlet check valve 14 closes the inlet check valve 14.
- the outlet pressure should not exceed a certain desired value. This value is determined by the stiffness of the pressure control spring and the area of the pressure control piston. Now, if the desired output pressure is reached during the cam lift, the pressure control spring is compressed and a further pressure increase does not take place.
- the pump promotes approximately no fluid.
- the pressure control piston remains in one position and the camshaft performs work only against the pressure control spring.
- an additional overpressure valve may be provided either in the inlet channel 5 or in the delivery channel 6.
- the invention thus shows a device for increasing the pressure in fluids, which can be introduced at low cost of materials and extremely low installation costs in almost all common housing of the above type, there to increase the pressure supply of the camshaft adjusting device as needed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
- Valve Device For Special Equipments (AREA)
Claims (7)
- Pompe à piston (1) pour liquides, en particulier pour lubrifiants dans des moteurs alternatifs à combustion interne, comprenant un piston de transfert (8), une soupape d'admission anti-retour (14), une soupape de sortie anti-retour (15) et un piston de contrôle de la pression (9), qui est disposé de manière à pouvoir coulisser dans le piston de transfert (8) et qui est retenu par un ressort de contrôle de la pression (10),
caractérisée en ce que
l'on prévoit un manchon (17) dans lequel le piston de transfert (8) est monté à coulissement. - Pompe à piston (1) selon la revendication 1,
caractérisée en ce que
l'on prévoit une bague de fixation (11) qui retient le piston de contrôle de la pression (9) et le ressort de contrôle de la pression (10) dans le piston de transfert (9). - Pompe à piston (1) selon la revendication 1 ou 2,
caractérisée en ce que
l'on prévoit du côté du piston de transfert (8) tourné vers la soupape d'admission anti-retour (14) un ressort de pression (13) qui sollicite le piston de transfert (8) par le biais d'une rondelle (12). - Pompe à piston (1) selon la revendication 3,
caractérisée en ce que
la rondelle (12), le ressort de pression (13) et la soupape d'admission anti-retour (14) sont disposés dans le manchon (17). - Pompe à piston (1) selon la revendication 4,
caractérisée en ce que
l'on prévoit une deuxième bague de fixation (18) qui fixe le piston de transfert (8) conjointement avec le piston de contrôle de la pression (9) et le ressort de contrôle de la pression (10), la rondelle (12), le ressort de pression (13) et la soupape d'admission anti-retour (14). - Pompe à piston (1) selon l'une quelconque des revendications précédentes,
caractérisée en ce que
le manchon (17) présente, du côté tourné vers la soupape d'admission anti-retour (14), un alésage pour le remplissage de la pompe à piston (1) par la soupape d'admission anti-retour (14). - Pompe à piston (1) selon l'une quelconque des revendications précédentes,
caractérisée en ce que
le manchon (17) est ouvert du côté détourné de la soupape d'admission anti-retour (14) pour recevoir le piston de transfert (8).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50108826T DE50108826D1 (de) | 2001-04-07 | 2001-04-07 | Kolbenpumpe für Hydrauliksysteme |
EP01108795A EP1247983B1 (fr) | 2001-04-07 | 2001-04-07 | Pompe à piston pour systèmes hydrauliques |
US10/063,169 US6676389B2 (en) | 2001-04-07 | 2002-03-27 | Piston pump for increasing pressure, comprising a transfer piston and a pressure-control piston |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01108795A EP1247983B1 (fr) | 2001-04-07 | 2001-04-07 | Pompe à piston pour systèmes hydrauliques |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1247983A1 EP1247983A1 (fr) | 2002-10-09 |
EP1247983B1 true EP1247983B1 (fr) | 2006-02-01 |
Family
ID=8177088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01108795A Expired - Lifetime EP1247983B1 (fr) | 2001-04-07 | 2001-04-07 | Pompe à piston pour systèmes hydrauliques |
Country Status (3)
Country | Link |
---|---|
US (1) | US6676389B2 (fr) |
EP (1) | EP1247983B1 (fr) |
DE (1) | DE50108826D1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10354599A1 (de) * | 2003-11-21 | 2005-06-16 | Zf Friedrichshafen Ag | Radialkolbenpumpe |
US7314353B2 (en) * | 2004-10-08 | 2008-01-01 | Urschel Laboratories, Inc. | Pump assembly for transporting a cooling fluid |
US20090272366A1 (en) * | 2008-04-30 | 2009-11-05 | Caterpillar Inc. | Internal combustion engine set up method and fuel pump having installation assist mechanism |
DE102010041310A1 (de) * | 2010-09-24 | 2012-03-29 | Robert Bosch Gmbh | Pumpe und Verfahren zu deren Herstellung |
DE102013016030A1 (de) * | 2013-09-26 | 2015-03-26 | Hydac System Gmbh | Fördereinrichtung |
US11033943B2 (en) * | 2017-09-13 | 2021-06-15 | Ford Motor Company | Mechanical applicator for use in stamping die process to apply thermo-chromatic ink to aluminum heat treated panels |
GB2622016A (en) * | 2022-08-30 | 2024-03-06 | Delphi Tech Ip Ltd | Lubricant dosing device for gaseous fuel engine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE28880E (en) * | 1967-07-21 | 1976-06-29 | Colorflo Limited | Printing machines feed mechanism |
DE2151715A1 (de) * | 1971-10-18 | 1973-04-26 | Kloeckner Humboldt Deutz Ag | Selbstregelnde kolbenpumpe |
FR2210722B1 (fr) * | 1973-11-26 | 1975-06-06 | Poclain Sa | |
DE19820902A1 (de) * | 1998-05-09 | 1999-11-11 | Bosch Gmbh Robert | Kolbenpumpe |
EP1046793A3 (fr) | 1999-04-21 | 2002-08-21 | Ford Global Technologies, Inc. | Dispositif de calage de soupape variable et méthode |
DE19918122A1 (de) * | 1999-04-22 | 2000-11-23 | Bosch Gmbh Robert | Kolbenpumpe |
JP3850598B2 (ja) * | 1999-10-07 | 2006-11-29 | 株式会社日立製作所 | 内燃機関のベーン式バルブタイミング制御装置 |
US20020056427A1 (en) * | 1999-12-21 | 2002-05-16 | Chun Liang Lee | Cam timing system |
JP4203703B2 (ja) * | 2000-06-14 | 2009-01-07 | アイシン精機株式会社 | 弁開閉時期制御装置 |
-
2001
- 2001-04-07 DE DE50108826T patent/DE50108826D1/de not_active Expired - Lifetime
- 2001-04-07 EP EP01108795A patent/EP1247983B1/fr not_active Expired - Lifetime
-
2002
- 2002-03-27 US US10/063,169 patent/US6676389B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50108826D1 (de) | 2006-04-13 |
EP1247983A1 (fr) | 2002-10-09 |
US20020146337A1 (en) | 2002-10-10 |
US6676389B2 (en) | 2004-01-13 |
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