EP3728809A1 - Kolbenkühldüse - Google Patents
KolbenkühldüseInfo
- Publication number
- EP3728809A1 EP3728809A1 EP18829373.2A EP18829373A EP3728809A1 EP 3728809 A1 EP3728809 A1 EP 3728809A1 EP 18829373 A EP18829373 A EP 18829373A EP 3728809 A1 EP3728809 A1 EP 3728809A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cooling nozzle
- spring
- piston cooling
- shaft
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
Definitions
- the invention relates to a piston cooling nozzle with the features of the preamble of
- Piston cooling nozzles are supplied with oil via a supply channel.
- the piston cooling nozzle has a valve which is set so that an injection at idle at low speed, with a small flow rate of the oil pump is not active.
- the piston cooling nozzle has a spring-biased piston, which is acted upon by a pressure oil counter to the spring force. If the oil pressure exceeds an opening pressure, the pressure oil flows through the piston cooling nozzle and is injected to the engine pistons.
- Ball valves may have the disadvantage that they tend to vibration excitation.
- the oil pressure delivered by a pump is controlled so that either during operation of the engine that does not require piston cooling, the oil pressure remains below that predetermined opening pressure or above the predefined opening pressure when piston cooling is required.
- the respective pressure-operated valve has a housing defining a cylinder chamber in which a piston is slidably disposed.
- a spring acts on one end of the piston to bias the piston to a valve closed position, the piston blocking an outlet thereby preventing oil from one inlet from passing the pressure operated valve to an outlet and then not to one or more shown piston cooling nozzles is passed on.
- the pressure operated valve When the pressure in the inlet exceeds a predetermined valve opening pressure, the pressure of the oil acting on the piston is sufficient to displace the piston against the action of the spring, thereby opening the oil flow from the inlet to the outlet and the oil flow to one or more piston cooling nozzles.
- the housing has a side outlet and a side inlet. In the closed position, the lateral surface of the piston blocks the outlet. In the open position, the piston is so far shifted so that the piston releases the outlet, connecting the inlet and outlet.
- the pressure operated valve includes a valve member in the form of a ball which is slidably supported.
- a spring acts on the ball such that it is biased to a closed position, the ball blocking an inlet thereby preventing oil from passing the valve to an outlet and then continuing to the piston cooling nozzles.
- the cylinder chamber has a longitudinally extending in the middle inlet, which opens into a cylinder chamber funnel-shaped.
- funnel-shaped mouth forms a valve seat, wherein the ball by a spring in the
- a piston cooling nozzle is known.
- the piston cooling nozzle makes it possible to inject an oil against the bottom of a piston or against a tunnel of the piston.
- the piston cooling nozzle contains a valve, which opens only from a certain opening pressure. Instead of a ball valve in this case a piston valve is used to avoid the disadvantages of ball valves. Disadvantages of ball valves should be an oscillation and a vibration.
- a nozzle body has an axial through hole into which a tubular sleeve with axial bore without play engages.
- a piston has a closure head, which in
- abut annular closure which is integrally formed with the nozzle body and having a seat bore, which is traversed by the oil.
- a helical compression spring is axially supported between a bottom integrally formed with the nozzle body and a downstream surface of the piston to urge the piston in the upstream direction against the annular closure seat. The piston is at his
- the piston is guided the tubular sleeve.
- the tubular sleeve has a radially directed hole located immediately downstream of the annular closure seat for directing the fluid radially to one or more circumferential passages existing between the outer surface of the tubular sleeve and the axial through bore surface of the nozzle body. are.
- the circumferential passages are adapted to axially direct the oil to a radial fluid passage. The oil is thus derived radially.
- annular outer recess is provided which forms an annular seat with the wall of the guide bore, which via radial bores of the piston with an axial bore of the piston communicates downstream to the axial
- Through hole of the body is open, which conducts the oil to a radial fluid passage in the nozzle body.
- the oil enters a chamber of the body, in which the spring is arranged.
- the oil flows around the spring and enters through a passage passage through the soil in a further chamber from which radially now the oil is forwarded.
- the invention is based on the object to improve this generic type piston cooling nozzle.
- the piston is slidably disposed in the cylinder housing against the pressure of a pressure oil, wherein the piston is biased by the spring against a valve seat.
- the piston has a piston head, wherein the piston head cooperates with a valve seat.
- the piston has an Ouertechnisch, wherein the Ouer réelle is in communication with a longitudinally extending longitudinal line. The longitudinal direction corresponds to the
- Displacement direction of the piston Oueriquesen are arranged transversely to the longitudinal direction.
- the output line may be perpendicular, i. extend radially in the piston.
- the longitudinally extending longitudinal conduit is formed in a shaft of the piston.
- the Ouertechnisch is in particular formed downstream of a valve surface of the piston head, wherein the valve surface on the piston head cooperates with the valve seat.
- the piston head delimits with the cylinder housing an annular space, wherein the Ouertechnisch extends in particular in the radial direction of the annular space up to the central longitudinal line in the shaft.
- the shaft extends through an opening in a bottom part of the cylinder housing.
- An ejection opening at the shaft end protrudes in the assembled state of the
- Piston cooling nozzle in the interior of the crankcase and is preferably oriented in the direction of the engine pistons. Now, if the pressure oil shifts the piston in the longitudinal direction, so also the shaft is moved in the longitudinal direction of the engine pistons. Due to the fact that the longitudinal channel is correspondingly long, namely projecting through a bottom part, a laminar flow is created which improves the spray pattern. As a result, the spray pattern is more concentrated, as a result of which the jet can strike the piston crown in a substantially point-like manner. There are no further lines for forwarding the Durcköls necessary, characterized in that the piston cooling nozzle is aligned with the shaft in the direction of the engine piston. As a result, the structure is simplified.
- the piston cooling nozzle is arranged in the mounted state in a receptacle of a crankcase.
- the piston cooling nozzle is inserted in the manner of a cartridge in a cylindrical receptacle. The assembly is simplified.
- the selected type of piston cooling nozzle vibration excitations are avoided.
- the parameters opening pressure and flow velocity can be varied without the volume flow being reduced. Flow losses are reduced.
- Opening pressure can be varied by selecting the characteristic of the spring.
- Flow rate can be selected by choosing the Ouerterrorisms the outlet opening.
- the piston has a shoulder, wherein the piston is guided by means of the shoulder within the cylinder housing.
- the shoulder outer surface is cylindrical.
- the piston head has a smaller one
- the piston head has a larger diameter than the shaft.
- piston head is dome-shaped and the valve seat is formed by a circular opening.
- the piston head can be well flowed around by the oil.
- the pressure oil is further accelerated at the exit from the piston cooling nozzle in that the longitudinal line is tapered towards an ejection opening.
- the shaft is surrounded by a spring.
- the spring is securely supported against tilting in that the spring is supported on a stop in an annular cavity in the region of the shoulder.
- the shoulder has a wall portion which radially surrounds the end of the spring. As a result, the end of the spring is kept centered.
- the piston cooling nozzle on a bottom part, wherein the spring is supported in particular on the ground part and on the other to a stop surface in the region of the shoulder.
- the bottom part may comprise a spring radially centered holding Wandabschitt. It is possible to perform the centering of the spring by the shaft alone.
- the bottom part may have a cylindrical wall portion which radially keeps the spring centered and surrounds the spring on the outside.
- Figure 1 is a schematic longitudinal sectional view of a piston cooling nozzle with a valve assembly, wherein the valve assembly is shown in a closed position, and
- Fig. 2 is a schematic longitudinal sectional view of the piston cooling nozzle of Fig. 1, wherein the valve assembly is arranged in an open position.
- a piston cooling nozzle 1 is shown.
- the piston cooling nozzle 1 has a cylindrical cylinder housing 2.
- a piston 3 in the longitudinal direction
- the cylinder housing 2 now has at one end face a bottom with a valve seat 5, wherein the valve seat opens into a cavity 4, provided that the piston 3 is in the open position (see Fig. 2).
- the valve seat 5 cooperates with a piston head 6.
- the piston head 6 is in particular dome-shaped or dome-shaped.
- the valve seat 5 is formed as a central opening, in particular as a bore, in the bottom of the cylinder housing 2.
- the valve head 6 passes from the dome-shaped region in a particular cylindrical region, wherein between this cylindrical portion and the inner wall of the cylinder housing an annular space remains.
- the pressure oil enters the cavity 4 through the valve seat 5, it also passes into this annulus.
- the shoulder 9 also has a cylindrical peripheral surface, wherein the piston 3 by means of this cylindrical peripheral surface on the Inner wall of the cylinder housing 2 is guided. The diameter of the shoulder 9 is greater than the diameter of the upstream piston head 6.
- the piston 3 now has a transverse line 7 extending from the annular space through the cylindrical peripheral surface of the piston head 6 into a longitudinal direction
- extending longitudinal line 8 extends.
- two are radially extending
- Transverse lines 8 present, which are formed during manufacture through a bore.
- the central longitudinal line 8 extends within a shaft 14 of the piston 3.
- This shaft 14 has a smaller diameter than the piston head 6 and also as the
- the shaft 14 is surrounded by a spring 10, in particular a coil spring 10, which is supported on the one hand on a spring stop surface 11 in an annular receptacle in the region of the shoulder 9 and on the other hand on a bottom part 12, which closes the cylinder housing 2.
- a spring 10 in particular a coil spring 10
- Both the bottom part 12 and the shoulder 9 in this case have cylindrical wall sections which keep the ends of the spring centered or
- the longitudinal channel 8 tapers toward a tip or ejection opening 15 of the shaft 14, so that here the flow velocity of the pressure oil increases and the pressure oil can be ejected at a higher speed.
- the shaft 14 passes through an opening 13 in the bottom part 12. Between the shaft 14 and the opening 13 remains a small gap through which oil that enters the space of the spring 10 can also escape into the crankcase.
- Flow rate can be varied without reducing the flow rate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017223465.2A DE102017223465A1 (de) | 2017-12-20 | 2017-12-20 | Kolbenkühldüse |
| PCT/EP2018/086065 WO2019122058A1 (de) | 2017-12-20 | 2018-12-20 | Kolbenkühldüse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3728809A1 true EP3728809A1 (de) | 2020-10-28 |
| EP3728809B1 EP3728809B1 (de) | 2021-10-06 |
Family
ID=64902092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18829373.2A Active EP3728809B1 (de) | 2017-12-20 | 2018-12-20 | Kolbenkühldüse |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3728809B1 (de) |
| DE (1) | DE102017223465A1 (de) |
| WO (1) | WO2019122058A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19633167A1 (de) * | 1996-08-17 | 1998-02-19 | Porsche Ag | Spritzdüse für die Kolbenkühlung einer Brennkraftmaschine |
| EP0947285A1 (de) * | 1998-03-31 | 1999-10-06 | Senior Engineering Investments AG | Vorrichtung mit Spritzrohr für Fahrzeugmotor und Verfahren zu ihrer Herstellung |
| FR2827009B1 (fr) | 2001-07-04 | 2003-12-12 | Bontaz Centre Sa | Gicleur de refroidissement a piston |
| DE10261180A1 (de) * | 2002-12-20 | 2004-07-01 | Daimlerchrysler Ag | Temperaturgeregelte Ölspritzdüse zur Kolbenkühlung |
| EP1929130B1 (de) * | 2005-09-16 | 2010-10-06 | ixetic Hückeswagen GmbH | Ventil für kolbenkühldüsen |
| GB2431217A (en) * | 2005-10-11 | 2007-04-18 | Ford Global Tech Llc | Piston oil spray cooling system with two nozzles |
| KR101393832B1 (ko) * | 2008-08-25 | 2014-05-13 | 현대자동차주식회사 | 차량의 피스톤 냉각용 체크 밸브 |
| GB2480474B (en) | 2010-05-20 | 2016-10-05 | Ford Global Tech Llc | An oil supply system for an engine |
| US8707927B2 (en) * | 2011-07-20 | 2014-04-29 | GM Global Technology Operations LLC | Oil squirter |
| JP5680601B2 (ja) * | 2012-09-29 | 2015-03-04 | 大豊工業株式会社 | ピストンクーリングジェット |
| DE102013014930A1 (de) * | 2013-09-11 | 2015-03-12 | Man Truck & Bus Ag | Steuerventil für eine Schmiermitteldüse |
-
2017
- 2017-12-20 DE DE102017223465.2A patent/DE102017223465A1/de not_active Withdrawn
-
2018
- 2018-12-20 WO PCT/EP2018/086065 patent/WO2019122058A1/de not_active Ceased
- 2018-12-20 EP EP18829373.2A patent/EP3728809B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017223465A1 (de) | 2019-06-27 |
| WO2019122058A1 (de) | 2019-06-27 |
| EP3728809B1 (de) | 2021-10-06 |
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