EP0624719A1 - Druckbegrenzungsvorrichtung in einem Schmierkreislauf einer Brennkraftmaschine - Google Patents
Druckbegrenzungsvorrichtung in einem Schmierkreislauf einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0624719A1 EP0624719A1 EP94401051A EP94401051A EP0624719A1 EP 0624719 A1 EP0624719 A1 EP 0624719A1 EP 94401051 A EP94401051 A EP 94401051A EP 94401051 A EP94401051 A EP 94401051A EP 0624719 A1 EP0624719 A1 EP 0624719A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- pressure
- piston
- shutter member
- return
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- F01M1/16—Controlling lubricant pressure or quantity
Definitions
- the present invention relates to a device for limiting the pressure in a lubrication circuit of an internal combustion engine, so as to limit the pressure of the oil discharged into the circuit by a pump driven in rotation by the engine.
- Relief valves generally include a hollow body disposed at the inlet of the return pipe which contains a movable shutter member (such as a piston, a ball or even a valve) which is permanently biased by a spring against a stop. or a seat provided at one of the open ends of the body, against the hydraulic pressure exerted on the active face of the organ.
- a movable shutter member such as a piston, a ball or even a valve
- Such an arrangement has a certain number of drawbacks, and in particular a relatively large size and noise.
- the action of the return spring tends to cause the shock of the shutter member on its seat or on its stop when it is closed, and this shock is all the more violent as the stiffness of the spring is strong.
- a spring of fairly low stiffness which then requires having a spring of great length to keep the same threshold value.
- the present invention therefore relates to a simple embodiment of such a device for limiting the pressure in a lubrication circuit, making it possible to remedy the drawbacks of the prior art, while ensuring both a reduced bulk and the elimination of all noisiness.
- the pressure limiting device of oil in a pressurized lubrication circuit of an internal combustion engine includes a discharge valve adapted to close a return line connecting the discharge line of the pump to the suction line of that -ci or to a reservoir, this valve comprising a body containing a shutter member urged to close by a return spring.
- the pressure limiting device is characterized in that a second return spring acts on the shutter member in the direction opposite to said first return spring.
- the shutter member rests in the closed position against the second spring, the second spring then constituting an elastic stop for the shutter member.
- the shutter member is formed by a piston mounted to slide in a corresponding cylindrical bore, this piston being subjected to the antagonistic action of two helical springs of pressure s extending between the ends of the bore and the piston.
- the first helical spring recalling the piston in its closed position has a stiffness much greater than that of the second spring, which makes it possible to obtain an extremely compact device.
- a device for limiting the pressure in a lubrication circuit which essentially comprises a discharge valve 1.
- This valve 1 comprises a hollow body 2 containing a shutter member such as a piston 3 mounted sliding in a corresponding cylindrical bore 4.
- the bore is provided with an inlet orifice 10 communicating with the discharge pipe of the oil pump not shown, and with an outlet orifice 9 communicating with a return pipe to the oil tank or to the suction line of the pump.
- the inlet orifice 10 opens at one end of the bore 4 and the thrust of the pumped oil is exerted on one of the transverse faces of the piston 3 delimiting a pressure chamber 6.
- the outlet orifice 9 opens into the side wall of the bore and can be masked by the piston 3 when the latter occupies its closed position in the bore 4.
- a first helical spring 7 of high stiffness acts on the face of the piston opposite to the pressure chamber 6, to return the piston 3 to its closed position.
- a second spring 8 of low stiffness is arranged in the pressure chamber 6 and constitutes an elastic stop for the piston 3 subjected to the thrust of the spring 7.
- the operating mode of the oil pressure limiting device is as follows.
- the active face of the piston 3 subjected to the hydraulic pressure action always has the same surface, in fact the spring 8 is permanently in contact with the piston 3, and this, unlike the devices according to the prior art where the shutter members come to bear against fixed seats.
- This arrangement therefore eliminates the sudden variations in thrust due to the separation of the obturator member from its seat, causing untimely beating of the spring 7 and of the piston 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9305821 | 1993-05-14 | ||
FR9305821A FR2705403B1 (fr) | 1993-05-14 | 1993-05-14 | Dispositif de limitation de la pression dans un circuit de lubrification de moteur. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0624719A1 true EP0624719A1 (de) | 1994-11-17 |
Family
ID=9447127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94401051A Withdrawn EP0624719A1 (de) | 1993-05-14 | 1994-05-11 | Druckbegrenzungsvorrichtung in einem Schmierkreislauf einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0624719A1 (de) |
FR (1) | FR2705403B1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005851A1 (en) | 1996-08-02 | 1998-02-12 | Ford Global Technologies, Inc. | Device for limiting the oil pressure in the lubricating oil circuit of an internal combustion engine |
EP0909884A1 (de) * | 1997-10-16 | 1999-04-21 | TCG UNITECH Aktiengesellschaft | Druckregelungsventil |
WO2008070712A1 (en) * | 2006-12-05 | 2008-06-12 | General Electric Company | System, method, and computer software code for controlling engine warm up of a diesel powered system |
CN106015668A (zh) * | 2016-05-31 | 2016-10-12 | 柳州柳工挖掘机有限公司 | 一种比例卸荷阀 |
CN113074029A (zh) * | 2021-04-14 | 2021-07-06 | 浙江尔格科技股份有限公司 | 一种机油泵减压阀及使用该减压阀的内燃机用机油泵 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2674268A (en) * | 1949-10-29 | 1954-04-06 | Standard Thompson Corp | Device for controlling the communication between a pressure tank and the atmosphere |
EP0110289A1 (de) * | 1982-12-06 | 1984-06-13 | Deere & Company | Ausgleichventil |
FR2649775A1 (fr) * | 1989-07-12 | 1991-01-18 | Peugeot | Clapet anti-retour en particulier pour un circuit de liquide sous pression dans un moteur a combustion interne |
FR2673677A1 (fr) * | 1991-03-06 | 1992-09-11 | Renault | Procede de lubrification pour moteur a combustion interne et dispositif pour sa mise en óoeuvre. |
-
1993
- 1993-05-14 FR FR9305821A patent/FR2705403B1/fr not_active Expired - Fee Related
-
1994
- 1994-05-11 EP EP94401051A patent/EP0624719A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2674268A (en) * | 1949-10-29 | 1954-04-06 | Standard Thompson Corp | Device for controlling the communication between a pressure tank and the atmosphere |
EP0110289A1 (de) * | 1982-12-06 | 1984-06-13 | Deere & Company | Ausgleichventil |
FR2649775A1 (fr) * | 1989-07-12 | 1991-01-18 | Peugeot | Clapet anti-retour en particulier pour un circuit de liquide sous pression dans un moteur a combustion interne |
FR2673677A1 (fr) * | 1991-03-06 | 1992-09-11 | Renault | Procede de lubrification pour moteur a combustion interne et dispositif pour sa mise en óoeuvre. |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998005851A1 (en) | 1996-08-02 | 1998-02-12 | Ford Global Technologies, Inc. | Device for limiting the oil pressure in the lubricating oil circuit of an internal combustion engine |
DE19631296C2 (de) * | 1996-08-02 | 1999-06-10 | Ford Global Tech Inc | Vorrichtung zur Begrenzung des Öldrucks in dem Schmierölkreislauf einer Verbrennungskraftmaschine |
EP0909884A1 (de) * | 1997-10-16 | 1999-04-21 | TCG UNITECH Aktiengesellschaft | Druckregelungsventil |
WO2008070712A1 (en) * | 2006-12-05 | 2008-06-12 | General Electric Company | System, method, and computer software code for controlling engine warm up of a diesel powered system |
CN106015668A (zh) * | 2016-05-31 | 2016-10-12 | 柳州柳工挖掘机有限公司 | 一种比例卸荷阀 |
CN106015668B (zh) * | 2016-05-31 | 2018-09-18 | 柳州柳工挖掘机有限公司 | 一种比例卸荷阀 |
CN113074029A (zh) * | 2021-04-14 | 2021-07-06 | 浙江尔格科技股份有限公司 | 一种机油泵减压阀及使用该减压阀的内燃机用机油泵 |
Also Published As
Publication number | Publication date |
---|---|
FR2705403B1 (fr) | 1995-06-23 |
FR2705403A1 (fr) | 1994-11-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1884656B1 (de) | Förderpumpe zur Einspritzung von Benzin unter hohem Druck | |
FR2647851A1 (fr) | Soupape de retenue pour circuit d'alimentation en carburant de moteur a combustion interne | |
FR2763097A1 (fr) | Dispositif permettant de controler la position de la cremaillere de commande d'un moteur a cylindree variable | |
FR2561309A1 (fr) | Soupape de surete pour turbocompresseur de moteur a combustion interne | |
EP0663545B1 (de) | Hydraulische Spannvorrichtung für ein endloses Element, insbesondere für eine Treibkette eines Verbrennungsmotors | |
FR2856443A1 (fr) | Circuit de controle du debit de refoulement d'une pompe hydraulique | |
FR2917803A1 (fr) | Systeme de clapet d'etancheite | |
FR2459369A1 (fr) | Dispositif de reglage d'ouverture de soupape, soupape regulatrice de la pression d'un fluide et systeme pour regler l'ouverture de la soupape de cylindre a commande par came d'un moteur a combustion interne les utilisant | |
EP0624719A1 (de) | Druckbegrenzungsvorrichtung in einem Schmierkreislauf einer Brennkraftmaschine | |
FR2841954A1 (fr) | Ensemble de suspension pneumatique et de valve pour un systeme de suspension pneumatique combine a un amortisseur | |
WO2010049603A1 (fr) | Tendeur hydraulique pour un organe de transmission de puissance a deux modes de fonctionnement | |
EP0237456A1 (de) | Hydraulischer Schwingungsunterdrücker und dessen Anwendung an Ventilen und dergleichen | |
FR2551139A1 (fr) | Demarreur a commande par air comprime, notamment pour moteurs a combustion interne | |
FR2547015A1 (fr) | Actionneur a accumulateur d'energie pneumatique notamment pour robinet | |
EP1937983B1 (de) | Ventil mit gedämpftem öffnungssystem | |
FR2738296A1 (fr) | Pompe de carburant haute pression pour un moteur a combustion interne | |
FR2475629A1 (fr) | Moteur a combustion interne comprenant un dispositif de debrayage pour l'accouplement et le desaccouplement d'un premier vilebrequin et d'au moins un second vilebrequin | |
FR2549166A1 (fr) | Agencement de valve pour limiter la pression dans un systeme sous pression | |
FR2646225A1 (fr) | Dispositif de lubrification des paliers d'un turbo-compresseur | |
EP0802327A1 (de) | Zahnradpumpe | |
FR2863332A1 (fr) | Soupape d'etranglement du flux de retour dans un systeme d'injection de carburant a haute pression | |
FR2482670A1 (fr) | Injecteur de combustible | |
CH640310A5 (en) | Hydraulic pump with a sprung valve | |
FR2752268A1 (fr) | Dispositif d'amelioration de la dynamique d'injection de combustible pour les moteurs diesel equipes de pompes d'injection a debit pulse | |
FR2478769A1 (fr) | Systeme de transmission hydrostatique, notamment pour vehicules automobiles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES GB IT |
|
17P | Request for examination filed |
Effective date: 19950425 |
|
17Q | First examination report despatched |
Effective date: 19960627 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19971006 |