Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/02—Valve drive
  • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
  • F01L1/047—Camshafts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
  • F01L2001/34423—Details relating to the hydraulic feeding circuit
  • F01L2001/34426—Oil control valves
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7837—Direct response valves [i.e., check valve type]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49405—Valve or choke making

Definitions

• the invention relates to a proportional valve with a piston guide sleeve and a valve piston movable in the piston guide sleeve and with a arranged in a pressure medium inlet to the proportional valve check valve and a mounting method for such a proportional valve.
• Such a proportional valve is known from DE 10 2005 060 1 1 1 A1.
• This proportional valve is designed for a camshaft adjuster for an internal combustion engine and integrated in a central screw for fastening the camshaft adjuster to a camshaft.
• the proportional valve to a check valve, which is formed spring-disk-shaped and is arranged in an annular pressure medium inlet laterally adjacent to the proportional valve on the outer circumference of the central screw.
• check valve is known from EP 1 291 563 A2.
• This check valve is designed for a particular designed as a cartridge valve proportional valve and integrated into this.
• this check valve is used in the region of a pressure medium inlet in a recess provided on the inner circumference of the piston guide sleeve prior to assembly of the valve piston.
• the assembly effort of such in the Kol- ben is required to assembly of the valve piston.
• the stroke of this formed as a spring ring check valve is not limited to the inside and thus the spring ring can collide with the valve piston. Such a collision can lead to failure of the proportional valve.
• the invention is based on the object of specifying a proportional valve, in particular for a camshaft adjuster of an internal combustion engine, in which the adaptation of the non-return valve to the proportional valve is improved over the prior art.
• the check valve is arranged in a ring gap surrounding the piston guide sleeve in the region of the pressure medium inlet.
• the check valve is on the one hand integrated into the actual proportional valve, so that the check valve does not have to be installed as a separate component during assembly of the proportional valve.
• the check valve is arranged outside the piston guide sleeve, that the check valve can not be moved radially against the valve piston.
• the proportional valve thus formed is otherwise preferably used for cam shaft adjustment of an internal combustion engine.
• the annular gap is delimited by an encapsulation that at least partially surrounds the piston guide sleeve and a receiving sleeve that encompasses at least a portion of the encapsulation.
• the receiving sleeve at its axial end to a portion of the annular gap forming receiving gap, in which the check valve is used.
• This embodiment allows a particularly simple and reliable mounting of the check valve by this is introduced without the use of tools in the end-side receiving gap and then the piston guide sleeve is inserted into the receiving sleeve.
• This refinement also reduces the machining effort on the components, in particular the piston guide sleeve.
• the piston guide sleeve in the inventive design for the formation of the annular gap is unprocessed.
• the provided with the encapsulation piston guide sleeve is integrally connected to the receiving sleeve.
• the non-return valve is inserted into a receiving portion of the annular gap forming a receiving gap of the receiving sleeve and then provided with the encapsulation piston guide sleeve inserted into the receiving sleeve and connected to this, for example, materially.
• a non-positive or positive connection may be provided.
• the cohesive connection can be realized for example by ultrasonic welding or gluing.
• a frictional connection is achieved, for example, by pressing the piston guide sleeve provided with the extrusion coating into the receiving sleeve, while a positive connection can be achieved by a snap connection.
• All of these embodiments offer the advantage of providing a highly functional proportional valve for a phaser.
• the check valve is designed as a slotted spring sleeve in the axial direction, which in turn can be made in an advantageous development of a metallic material, such as sheet metal or stainless steel.
• the encapsulation forms on its outer circumferential surface a radially acting in the open position of the check valve stop and the receiving sleeve on its inner lateral surface acting radially in the closing direction of the check valve stop.
• the check valve In the unactuated state, the check valve is powerless or slightly biased to the inner circumferential surface of the receiving sleeve. If pressure medium fluid, in particular hydraulic fluid, flows radially from the outside into the adjustment space of the proportional valve, then the check valve is pressed by the pressure of the pressure medium fluid against the outer circumferential surface of the extrusion coating and opens the inlet. If pressure oscillations occur opposite to the flow, then the check valve closes against the radial pressure medium inlet of the receiving sleeve.
• This embodiment offers the advantage that a reliable function is ensured. In any case, it is ensured that a collision of the check valve with the valve piston is excluded.
• 1 is an overall perspective view of the entire proportional valve for the phaser, a longitudinal section through the proportional valve with the check valve in a closed position, a longitudinal section through the proportional valve with the check valve in an open position and a cross section through the proportional valve with the check valve in a closed position.
• the proportional valve 1 according to the invention is provided for a camshaft adjuster of an internal combustion engine.
• the camshaft driven by the camshaft adjuster serves to open the gas exchange valves used for pushing out the combusted gases and sucking in the fresh gases against the force of valve springs mounted on each gas exchange valve.
• Rigid control times for the gas exchange valves represent a compromise for the design with regard to the achievable mean-pressure maximum or torque maximum and its locations in the usable speed range and the achievable power at rated speed.
• the actuating piston 6 of the control part 2 displaces the valve piston 3 in a piston guide sleeve 4 of the proportional valve 1 between two end positions and thereby causes a controlled adjustment of the timing on the camshaft adjuster.
• the proportional valve 1 is in addition to the control part 2 of the piston guide sleeve 4 (see Figures 2 to 4 for detailed illustration), which in the range of a pressure medium inlet 10 and a working port 1 1 b with a Um- injection 5 is provided in particular of a plastic material.
• the valve piston 3 is displaceable by the actuation part 2 by means of the actuation piston 6 (FIGS. 2 and 3) against the force of a valve spring 7.
• the provided with the encapsulation 5 piston guide sleeve 4 is inserted into a receiving sleeve 8 and fixed at its end remote from the control part 2 end with this via a snap connection 9 ( Figure 2, 3) accurately positioned.
• the proportional valve 1 has four hydraulic fluid connections, namely lent a connected to a pump pressure medium inlet 10, two working ports 1 1 a, 1 1 b and connected to a tank return port 1 1 c, which leads through the interior of the hollow cylindrical valve piston 3.
• the hydraulic fluid which is in particular the engine oil of the internal combustion engine
• the proportional valve 1 and fed through corresponding passages in the receiving sleeve 8, the encapsulation 5 and depending on the position of the valve piston 3 via a control piston 12a and 12b as part of the valve piston 3 limited annulus 12 to the working ports 1 1 a, 1 1 b out.
• From the working port 1 1 a is a connection to the return port 1 1 c via a connection opening 16 in the valve piston 3 produced.
• a defined adjustment of the camshaft is achieved with respect to an example toothed belt-operated or chain-operated drive wheel.
• This is achieved, for example, by one or more adjusting pistons of the camshaft adjuster 1 which are connected to the camshaft and which are guided through opposing adjusting piston chambers which communicate with the working ports 11a, 11b. are binding, is rotated by imported hydraulic fluid relative to the drive wheel / be.
• a check valve 13 is inserted in the hydraulic fluid access 10, which in a closed position on the receiving sleeve 8 ( Figure 2) and in an open position on the encapsulation 5 ( Figure 3) is applied.
• the piston guide sleeve 4, the encapsulation 5 and the receiving sleeve 8 form an annular gap 14 ( Figure 4), in which the check valve 13 is arranged.
• the receiving sleeve 8 has a nose 15 which cooperates with the encapsulation 5.
• This nose 15 causes the check valve 13 can not rotate within the annular gap 14. This is a malfunction is excluded. Furthermore, it is ensured by the inventive design that the check valve 13 in the open position with the valve piston 3 can not come into contact.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Valve Device For Special Equipments (AREA)
• Valve-Gear Or Valve Arrangements (AREA)
• Magnetically Actuated Valves (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43842702

Family Applications (1)

Country Status (7)

Families Citing this family (6)

Citations (6)

Family Cites Families (8)

• 2010
  • 2010-02-26 DE DE201010009401 patent/DE102010009401A1/de not_active Withdrawn
• 2011
  • 2011-01-25 CN CN201180011295.7A patent/CN102770627B/zh not_active Expired - Fee Related
  • 2011-01-25 US US13/580,215 patent/US20120312396A1/en not_active Abandoned
  • 2011-01-25 KR KR20127022117A patent/KR20130008013A/ko not_active Application Discontinuation
  • 2011-01-25 WO PCT/EP2011/050977 patent/WO2011104058A1/de active Application Filing
  • 2011-01-25 EP EP11701505.7A patent/EP2539554B1/de not_active Not-in-force
  • 2011-01-25 BR BR112012021449A patent/BR112012021449A2/pt not_active IP Right Cessation

Patent Citations (6)

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