GB2515392A - Anti-drain back valve for a pump device - Google Patents

Anti-drain back valve for a pump device Download PDF

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Publication number
GB2515392A
GB2515392A GB1408161.6A GB201408161A GB2515392A GB 2515392 A GB2515392 A GB 2515392A GB 201408161 A GB201408161 A GB 201408161A GB 2515392 A GB2515392 A GB 2515392A
Authority
GB
United Kingdom
Prior art keywords
guide
valve
valve element
duct
guide portion
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Withdrawn
Application number
GB1408161.6A
Other versions
GB201408161D0 (en
Inventor
Adam Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daimler AG filed Critical Daimler AG
Priority to GB1408161.6A priority Critical patent/GB2515392A/en
Publication of GB201408161D0 publication Critical patent/GB201408161D0/en
Publication of GB2515392A publication Critical patent/GB2515392A/en
Withdrawn legal-status Critical Current

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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
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N23/00—Special adaptations of check valves
    • 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
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • F01M2001/105—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements
    • F01M2001/1085—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters characterised by the layout of the purification arrangements comprising non-return valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

An anti-drain back valve 18 for a pump device (10 Fig 1) in use conveys a lubricant, in particular for an engine, through at least one duct 16 in a first direction (indicated by arrow 42). The valve has at least one valve element 20 arranged in the duct and at least one guide 26 that includes at least two guide portions connected to one another 38, 40, and the guide cooperates with an engaging guide element 32. When the guide element engages a first one of the guide portions the valve element is movable between a closed position in which the duct is fluidically blocked by the valve element and at least one open position thereby allowing the lubricant to flow through the duct (16) in the first direction. When the guide element engages a second guide portion the valve element is prevented from reaching its closed position thereby allowing the lubricant to bypass the valve element and flow in the second direction (indicated by arrow 44). In use the guide element is moved from the second guide portion into the first guide portion by the pumped lubricant acting upon the valve element when pumping the lubricant through the duct in the first direction.

Description

Anti-Drain Back Valve for a Pump Device The invention relates to an anti-drain back valve for a pump device configured to convey a lubricant, in particular for an engine.
DE 103 45 596 Al shows an anti-drain back valve for an oil circuit which comprises at least one oil filter. The anti-drain back valve can also be used for filling the oil circuit with a lubricant in the form of oil for the first time. The anti-drain back valve comprises a first valve element configured to allow the oil to flow to the oil filter in a first direction and prevent the oil from flowing back in an opposite second direction. Moreover, the anti-drain back valve comprises a second valve element configured to allow the oil to flow into the oil circuit in a first direction and prevent the oil from flowing back in an opposite second direction.
Moreover, US 5,039,403 shows an engine oil filter having an anti-drain back valve that is normally closed on a seat that has inlets therethrough for oil passage into the filter. The oil filter further comprises an apparatus for depositing a viscous material as a temporary valve opener between the anti-drain back valve and its seat. Said apparatus comprises a base, a plurality of injectors extending in parallel relationship from the base and angularly and readily spaced about a center point of the base so as to align with a corresponding number of said inlets and be insertable therethrough, a pressurized source of temporary valve opener viscous material connected to said injectors, said injectors having a length determined to engage and lift said valve off its seat leaving a space therebetween when said filter is forced against said base with said injectors extending through said inlets. The injectors each have an outlet port located actually therealong and facing in a radial direction so as to be opposite to the space between said valve and said seat and thereby in a position to deposit said temporary valve opener viscous material into said space.
It is an object of the present invention to provide an anti-drain back valve by means of which a first filling event in which a reservoir is filled with a lubricant for the first time can be realized in a particularly advantageous manner, wherein the complexity and the cost of the anti-drain back valve can be kept particularly low.
This object is solved by an anti-drain back valve having features of patent claim 1.
Advantageous embodiments with expedient developments of the invention are indicated in the other patent claims.
The present invention relates to an anti-drain back valve for a pump device configured to convey a lubricant through at least one duct in a first direction. For example, the lubricant is oil which is used to cool and/or lubricate an engine. For example, the engine is designed as an internal combustion engine of a motor vehicle, in particular a commercial vehicle. The anti-drain back valve comprises at least one valve element arranged in the duct. Moreover, the anti-drain back valve comprises at least one guide having at least two guide portions which are connected to one another. The guide portions are also referred to as tracks" or "guide paths". Furthermore, the anti-drain back valve comprises at least one guide element which engages the guide.
When the guide element engages the first guide portion, the valve element is movable between a closed position and at least one open position thereby allowing the lubricant to flow through the duct in the first direction and preventing the lubricant from flowing through the duct in a second direction being opposite to the first direction. In the closed position, the duct is fluidically blocked by the valve element. Thereby, for example, the anti-drain back valve can prevent the lubricant from flowing through the duct in the second direction back to the pump device and allows the lubricant to flow in the first direction through the duct when the lubricant is conveyed by the pump device.
When the guide element engages the second portion, the valve element is prevented from reaching its closed position thereby allowing the lubricant to bypass the valve element in the second direction. This means the lubricant can bypass the valve element so that the lubricant which is, for example, oil can flow through the duct in the second direction. Thereby, the lubricant can flow through the pump device thereby priming the pump device during a first filling event. In said first filling event, a reservoir is filled with the lubricant for the first time. For example, the first filling event takes place after the engine is manufactured and before the engine is started for the first time. Thus, an excessive time to prime the pump device during a production test can be avoided.
The guide element is movable from the second guide portion into the first guide portion by the lubricant acting upon the valve element when pumping the lubricant through the duct in the first direction by means of the pump device. For example, when the engine is started for the first time, the pump device pumps the lubricant through the duct in the first direction for the first time. Hence, the lubricant acts upon the valve element thereby moving the valve element in such a way that the guide element is moved from the second guide portion into the first guide portion. Hence, after the first filling event, the valve element is movable along the first guide portion between the open position and the closed position so as to allow the lubricant to flow in the first direction and prevent the lubricant to flow in the second direction through the duct. Thereby, the complexity and, thus, the cost of the anti-drain back valve can be kept particularly low since a bypass valve integrated in the valve element and allowing the lubricant to bypass the valve element during the first tilling event can be avoided.
Further advantages, features, and details of the invention derive from the following description of a preferred embodiment as well as from the drawings. The features and feature combinations previously mentioned in the description as well as the features and the feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed on the respective indicated combination but also in any other combination are taken alone without leaving the scope of the invention.
The drawings show in: Fig. 1 a schematic perspective view of a pump device and a suction module configured to convey and guide a lubricant in the form of oil of an engine, the suction module having an anti-drain back valve; Fig. 2 a schematic perspective view of the suction module; Fig. 3 a schematic perspective view of a valve element of the anti-drain back valve; Fig. 4 a schematic sectional view of the anti-drain back valve; Fig. 5 a further schematic sectional view of the anti-drain back valve; and Fig. 6 a further schematic sectional view of the anti-drain back valve.
In the figures the same elements or elements having the same functions are designated with the same reference signs.
Fig. 1 shows a pump device in the form of an oil pump 10 for an engine of a vehicle. The engine is designed as an internal combustion engine configured to drive the vehicle, which is, for example, a commercial vehicle, in particular a truck. The engine comprises at least one reservoir in which a lubricant in the form of oil can be stored. The oil pump 10 serves to convey or pump the oil, for example, from the reservoir to various positions which are cooled and/or lubricated by the oil. Fig. 1 further shows a suction module 12 via which the oil is sucked from the reservoir by means of the pump 10. The pump 10 is fluidically connected to the suction module 12 by duct elements 14. As can be seen from Fig. 2, the suction module 12 has at least one duct 16 through which the oil can flow.
As can be seen from Figs. 3 to 6, the suction module 12 further comprises an anti-drain back valve 18 (Figs. 4 to 6) having at least one valve element 20 (Fig. 3). The valve element 20 comprises a valve body 22 which is made of, for example, a plastic material.
Moreover, the valve element 20 comprises at least one sealing 24 attached to the valve body 22. For example, the sealing 24 is smoother than the valve body 22. As can be seen in Fig. 4 to 6, the valve element 20 is arranged in the duct 16. The anti-drain back valve 18 further comprises at least one guide 26 arranged on a wall 28 which bounds the duct 16 at least partially. In the present case, the guide 26 is molded on a housing 30 of the suction module 12, the housing 30 bounding the duct 16. Furthermore, the anti-drain back valve 18 comprises at least one guide element designed as a guide pin 32. For example, the guide pin 32 is molded on the valve element 20, in particular the valve body 22, the guide pin 32 engaging the guide 26.
The housing 30 has a wall portion 32 forming a valve seat 36. In a closed position of the valve element 20, the sealing 24 interacts with the valve seat 36 so that the duct 16 is fluidically blocked by the valve element 20. For example, the anti-drain back valve 18 comprises at least one spring which is not shown in the figures. This spring is supported or supportable on the valve element 20 on one side and supported or supportable on the housing 30 on the other side. The valve element 20 is movable relative to the housing 30 between the closed position shown in Fig. 6 and at least one open position shown in Fig. 5. By moving the valve element 20 from the closed position into the at least one open position, the spring is loaded: for example, the spring is compressed. Thereby, the spring exerts a spring force on the valve element 20 in the open position, so that the valve element 20 can be moved back from the open position into the closed position by means of said spring force. Preferably, the spring is also loaded in the closed position thereby exerting its spring force on the valve element 20. Thereby, the valve element 20, in particular the sealing 24, is pressed onto the valve seat 36 by the spring.
The guide 26 has a first guide portion 38 which is also referred to as a "primary path" or a "primary guide path". Moreover, the guide 26 has a second guide portion 40 which is also referred to as a "short track". The second guide portion 40 is connected to the first guide portion 38 so that, for example, the guide pin 32 can be moved, in particular slipped, from the second guide portion 40 into the first guide portion 38. As can be seen in Fig. 4, the second guide portion 40 is formed so as to effect a rotational movement when the valve element 20 is translationally moved to the left with respect to the image pane of Fig. 4.
Such a movement of the valve element 20 can be effected by the oil acting upon the valve element 20 when the oil is pumped by the oil pump 10. When the oil pump 10 pumps the oil through the duct 16, the oil flows through the duct 16 in a first direction which is illustrated by directional arrow 42. A second direction opposite to the first direction is illustrated by directional arrow 44.
The rotational movement is effected by the second guide portion 40 in such way that a second guide portion 40 comprises a first section 46 extending at least substantially parallel to the first guide portion 38. Moreover, the second guide portion 40 comprises a second section 48 which extends angularly to the first section 46 and the first guide portion 38, wherein the second guide portion 40 is connected to the first guide portion 38 via the second section 48 which effects said rotational movement.
When the guide element in the form of a guide pin 32 engages the first guide portion 38, the valve element 20 is movable between the closed position in which the duct 16 is fluidically blocked by the valve element 20 and at least one open position thereby allowing the oil to flow through the duct 16 in the first direction and preventing the oil from flowing through the duct 16 in the second direction. However, when the guide element engages the second guide portion 40, the valve element 20 is prevented from reaching its closed position thereby allowing the oil to bypass the valve element 20 in the second direction.
The guide pin 32 is movable from the second guide portion 40 into the first guide portion 38 by the oil acting upon the valve element 20 when pumping the oil through the duct 16 in the first direction by means of the oil pump 10.
The valve element 20 is prevented from reaching its closed position although the spring force is exerted on the valve element 20 by the loaded spring since the short track is shorter than the primary guide path. When the guide pin 32 engages the primary guide path, the valve element 20 can be pushed into the closed position by means of the relaxing spring thereby reaching the valve seat 36. When the guide pin 32 engages the short track, the valve element 20 can reach the valve seat 36 so that the duct 16 is not fluidically blocked. Thus, the oil can flow through the duct 16 in the second direction to the oil pump 10. When the anti-drain back valve 18 is assembled by, for example, a supplier, the valve element 20 and, thus, the guide pin 32 are rotated so that the guide pin 32 follows the short track which prevents the valve element 20 from seating, i.e. from reaching the closed position and, thus, the valve seat 36. This rotational movement to move the guide pin 32 into the short track (second guide portion 40) is illustrated in Fig. 4 by a directional arrow 50. When the guide pin 32 engages the second guide portion 40, the valve element 20 is held in an intermediate position shown in Fig. 4 by the short track, the guide pin 32 and the spring. In said intermediate position, the sealing 24 does not interact with the valve seat 36. The spring retains the valve element 20 in this intermediate position for the remainder of the assembly process, including shipping of the engine to, for example, a manufacturing location, in all the way through the first filling event.
During a first filling event, in which the reservoir of the engine is filled with the oil for the first time before the engine is fired up for the first time, the guide pin 32 engages the short track so that the oil can flow through the duct 16 in the second direction during the first filling event thereby priming the oil pump 10. In other words, during the first filling of the engine in production, the oil can bypass the valve element 20. After the first filling event, the engine is started or fired up for the first time. Thus, the oil is pumped through the duct 16 in first direction by means of the oil pump 10.
Upon first firing of the engine and pumping the oil through the duct 16 in the first direction, the oil flowing through the duct 16 in the first direction exerts forces on the valve element thereby effecting a movement of the valve element 20 from the intermediate position into or towards the open position as can be seen in Fig. 5. Thereby, the guide pin 32 is moved along the second guide portion 40 which effects a rotational movement of the valve element 20. Moreover, the guide pin 32 is moved from the second guide portion 40 into the first guide portion 38, i.e. the primary guide path. In other words, the valve element 20 is forced all the way open by the oil.
When the engine and, thus, the oil pump 10 are switched off, the spring forces the valve element 20 along the primary guide track from the open position into the closed position.
This moans that after the movement of the guide pin 32 from the second guide portion 40 into the first guide portion 38, the guide pin 32 can follow the primary guide path which allows the valve element to fully seat when the oil pump 10 is switched off and, thus, the loaded spring can relax at least partially thereby translationally moving the valve element from the open position into closed position. After that, the short track is never used again for the life of the engine. This means the valve element 20 and, thus, the guide pin 32 are only moved along the first guide portion 38 for the rest of the life of the engine after the first filling event.
List of reference signs oil pump 12 suction module 14 duct element 16 duct 18 anti-drain back valve valve element 22 valve body 24 sealing 26 guide 28 wall housing 32 guide pin 34 wall portion 36 valve seat 38 first guide portion second guide portion 42 directional arrow 44 directional arrow 46 first section 48 second section

Claims (5)

  1. Claims An anti-drain back valve (18) for a pump device (10) configured to convey a lubricant, in particular for an engine, through at least one duct (16) in a first direction (42), the anti-drain back valve (18) comprising: -at least one valve element (20) arranged in the duct (16), -at least one guide (26) having at least two guide portions (38, 40) which are connected to one another, -at least one guide element (32) engaging the guide (26), wherein, when the guide element (32) engages a first one of the guide portions (38, 40), the valve element (20) is movable between a closed position in which the duct (16) is fluidically blocked by the valve element (20) and at least one open position thereby allowing the lubricant to flow through the duct (16) in the first direction (42) and preventing the lubricant from flowing through the duct (16) in a second direction (44) being opposite to the first direction (42), and, when the guide element (32) engages the second guide portion (40), the valve element (20) is prevented from reaching its closed position thereby allowing the lubricant to bypass the valve element (20) in the second direction (44), the guide element (32) being movable from the second guide portion (40) into the first guide portion (38) by the lubricant acting upon the valve element (20) when pumping the lubricant through the duct (16) in the first direction (42) by means of the pump device (10).
  2. 2. The anti-drain back valve (18) according to claim 1, characterized in that the second guide portion (40) is formed so as to effect a rotational movement of the valve element (20) when moving the guide element (32) from the second guide portion (40) into the first guide portion (38).
  3. 3. The anti-drain back valve (18) according to claim 2, characterized in that the second guide portion (40) comprises a first section (46) extending parallel to the first guide portion (38) and a second section (48) extending angularly to the first section (46) and the first guide portion (38), the second guide portion (40) being connected to the first guide portion (38) via the second section (48) which effects the rotational movement of the valve element (20).
  4. 4. The anti-drain back valve (18) according to any one of the preceding claims, characterized in that the guide element (32) is arranged on the valve element (20) and the guide (26) is arranged on a wall (28) bounding the duct (16) at least partially.
  5. 5. A vehicle, in particular a commercial vehicle having an anti-drain back valve (18) according to any one of the preceding claims.
GB1408161.6A 2014-05-08 2014-05-08 Anti-drain back valve for a pump device Withdrawn GB2515392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1408161.6A GB2515392A (en) 2014-05-08 2014-05-08 Anti-drain back valve for a pump device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1408161.6A GB2515392A (en) 2014-05-08 2014-05-08 Anti-drain back valve for a pump device

Publications (2)

Publication Number Publication Date
GB201408161D0 GB201408161D0 (en) 2014-06-25
GB2515392A true GB2515392A (en) 2014-12-24

Family

ID=51032441

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1408161.6A Withdrawn GB2515392A (en) 2014-05-08 2014-05-08 Anti-drain back valve for a pump device

Country Status (1)

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GB (1) GB2515392A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4997554A (en) * 1989-03-14 1991-03-05 Saturn Corporation Temporary anti-drainback valve opener for an oil filter assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4997554A (en) * 1989-03-14 1991-03-05 Saturn Corporation Temporary anti-drainback valve opener for an oil filter assembly

Also Published As

Publication number Publication date
GB201408161D0 (en) 2014-06-25

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)