US3799129A - Hydraulic lash adjuster oil metering means - Google Patents

Hydraulic lash adjuster oil metering means Download PDF

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Publication number
US3799129A
US3799129A US00304035A US30403572A US3799129A US 3799129 A US3799129 A US 3799129A US 00304035 A US00304035 A US 00304035A US 30403572 A US30403572 A US 30403572A US 3799129 A US3799129 A US 3799129A
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US
United States
Prior art keywords
closure element
plunger
reservoir
plate
oil
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
Application number
US00304035A
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English (en)
Inventor
R Cornell
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.)
Sealed Power Technologies LP
Kodiak Partners Corp
Johnson Products Inc
Original Assignee
Johnson Products Inc
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 Johnson Products Inc filed Critical Johnson Products Inc
Priority to US00304035A priority Critical patent/US3799129A/en
Priority to CA183,018A priority patent/CA992414A/en
Priority to AU61542/73A priority patent/AU471405B2/en
Priority to IT30408/73A priority patent/IT998839B/it
Priority to GB5083573A priority patent/GB1414429A/en
Priority to JP48122274A priority patent/JPS4980443A/ja
Priority to FR7339252A priority patent/FR2205930A5/fr
Priority to DE19732355379 priority patent/DE2355379A1/de
Priority to BR8650/73A priority patent/BR7308650D0/pt
Application granted granted Critical
Publication of US3799129A publication Critical patent/US3799129A/en
Assigned to SPX CORPORATION, A CORP. OF DE. reassignment SPX CORPORATION, A CORP. OF DE. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER CORPORATION, A CORP. OF DE. (CHANGED TO), SPAR CORPORATION, A CORP. OF DE (MERGED INTO)
Assigned to KODIAK PARTNERS CORP., A CORP. OF DE reassignment KODIAK PARTNERS CORP., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPX CORPORATION, A DE CORP.
Assigned to CHEMICAL BANK reassignment CHEMICAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER, TECHNOLOGIES, L.P., A DE LIMITED PARTNERSHIP
Assigned to CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT reassignment CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER TECHNOLOGIES, L.P.
Assigned to SEALED POWER TECHNOLOGIES, L.P. reassignment SEALED POWER TECHNOLOGIES, L.P. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KODIAK PPARTNERS CORP.
Assigned to SEALED POWER TECHNOLOGIES, L.P. reassignment SEALED POWER TECHNOLOGIES, L.P. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 6/20/89, DE Assignors: SEALED POWER TECHNOLOGIES, L.P.
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot

Definitions

  • ABSTRACT Lubricating oil through the lash adjuster body is directed first into a reservoir formed by a plunger reciprocating within the lash adjuster body and then through a central passageway formed in the closure element which element forms the pivot for the rocker arm.
  • a plate is positioned in the plunger cavity intermediate the reservoir and lower end of the closure element, the latter having a groove extending radially from the central passageway to the clearance between the plunger wall and closure element.
  • the plate is urged by the oil pressure in the reservoir against the lower end of the closure element forming with the groove a restricted passageway which meters the oil flow to the lubricating arm.
  • the plate is also a check valve during engine start up to prevent the ingestion of air into the plunger.
  • cams bear against rocker arms which open and close the engine valves.
  • Each rocker arm assembly is pivoted on a hydraulic lash adjuster which takes up slack in the valve train due to any expansion of the parts as the engine heats up.
  • an open ended plunger reciprocates within the adjuster body with the plunger cavity and body being closed by a closure element which forms the pivot for the rocker arm. Oil is directed into the adjuster body through an oil inlet which leads into a reservoir formed by the plunger cavity from whence it is directed up to the rocker arm through a central passageway formed in the closure element.
  • the lower end of the closure element extends within the body and is spaced above a shoulder formed on the plunger.
  • a plate means is positioned intermediate a portion of the lower end of the closure element and the plunger shoulder, the diameter of which is less than the inner diameter of the adjacent wall thereby providing a clearance for oil flow around the plate.
  • the plate is urged against the lower end portion of the closure element by the oil pressure in the reservoir and forms a restricted passageway with a groove in the end portion of the closure element extending from the passageway at least to the clearance between the plate and adjacent wall.
  • the restricted passageway meters the flow of oil through the adjuster.
  • the plate means provides a check to prevent ingestion of air into the plunger during engine start and run up. Until the engine oil pressure is great enough to move the plate means off the plunger seat, the plate means is a check valve preventing back flow.
  • an extremely simplified meter lubricating means is provided by a plate which is extremely simple and inexpensive to manufacture.
  • a minimum number of elements are required which furthermore do not require high tolerance machining since the functional operation is simple and straight forward.
  • a simple straight machined or coined groove on the lower end of the closure element through one of its walls fixes the meter rate.
  • Existing lash adjuster constructions could be utilized to provide metering in accordance with my invention without requiring any extensive or expensive modification.
  • FIG. 1 is a schematic representation of an overhead cam valve train having a hydraulic lash adjuster according to the invention
  • FIG. 2 is an enlarged sectional view of the lash adjuster shown in FIG. 1;
  • FIG. 3 is a plan view of the meter plate utilized in accordance with the invention.
  • FIG. 4 is a cross-sectional view of the lash adjuster of the invention taken along line IV--IV of FIG. 2;
  • FIGS. 5 and 6 are enlarged sectional views of the inner end of the closure element.
  • FIG. 7 is a bottom end view of the closure element.
  • a valve 2 having a spring 4 and retainer 6, is actuated by rocker arm 8 through a camshaft l0 and cam 12.
  • the rocker arm 8 pivots about a solid or closed socket 14 on lash adjuster 16.
  • the lash adjuster which automatically adjusts for lash, contains a body 18 with a plunger 20.
  • Plunger 20 is biased in the upward position against the closed socket 14 of rocker arm 8 through a spring 22.
  • Plunger 20 has an internal cavity 24 which opens into a bottom compression chamber through check valve plate 26.
  • a spring 28 biases valve plate 26 against the bottom of plunger 20.
  • a valve retainer 30, which holds the check valve assembly in place, is held against the bottom of plunger 20 by spring 22.
  • Lubricating oil enters cavity 24 through ports 32 and 34. As is conventional in hydraulic valve assemblies, the oil passes through cavity 24 through the bottom portion of plunger 20 into the bottom compression chamber.
  • closure element 40 The open upper ends of lash adjuster body 18 and plunger 20 are closed by a closure element 40.
  • the lower portion of closure element 40 extends down within cavity 24 of plunger 20 while the upper end includes a spherical nose portion 42 which forms a fulcrum for rocker arm 8. Nose 42 is seated in seat 14 of rocker arm 8 and retained there by a spring 44 which clips into an annular groove 46 formed in closure element 40 beneath nose 42.
  • Closure element 40 includes an annular shoulder 48 projecting beyond its outer side wall for limiting the downward movement of closure element 40 relative to plunger 20.
  • the reciprocal motion of plunger 20 is limited at the lower extremity by shoulder 50 and at the upper extremity by a retainer 52 positioned in an annular groove 54 formed in the upper end of adjuster body 18. Shoulder 48 acts as a stop in both the upper and lower travel of closure element 40 by engaging either the upper end of plunger 20 or retainer ring 52.
  • Plunger includes an inner shoulder 60 which acts as a stop for a meter plate 62 positioned intermediate the lower end 64 of closure element 40 and shoulder 60.
  • Meter plate 62 is preferably a very thin flat disc having a diameter less than the inner wall diameter of plunger 20 above shoulder 60 so that when plate 62 is positioned above shoulder 60, an annular clearance 66 permits free flow of lubricating oil from the lower portion of cavity 24 below plate 62 up and around the plate.
  • the lower portion of cavity 24 below plate 62 defines an oil reservoir 68 which is constantly supplied with lubricating oil through ports 32 and 34.
  • closure element 40 When closure element 40 is in its lowermost position with shoulder 48 in abutment against the upper end of plunger 20, the lower end 64 of closure element 40 is spaced above shoulder 60 a distance greater than the thickness of plate 62. This permits plate 62 to be positioned off seat 60 so that oil flow from the reservoir around plate 62 is possible. Plate 62 is preferably light enough so that the oil pressure in reservoir 68 urges plate 62 axially away from seat 60 into flush abutting engagement with the lower end 64 of closure element 40. The oil flow around plate 62 is directed to the center bore 41 by a passageway 70 formed by the upper flat face of plate 62 and a radial slot 72 formed in the lower end of closure element 40.
  • plate 62 when the engine is not running, plate 62 will come to rest by its own weightvon seat 60 since there is no counteracting oil reservoir pressure.
  • the plate acts as a check valve in this position to prevent the ingesting of air into the plunger reservoir 68 during the period of engine start up before engine oil pressure has been established. Once the engine oil pressure is established, plate 62 is urged up against closure element 40 to establish oil flow to the rocker arm.
  • slot 70 is selected so that it forms a restricted passageway limiting the flow therethrough to a prescribed amount over a given prescribed length of time.
  • an extremely simplified flow passageway and meter means is provided by a single slot or groove formed in the lower edge of the closure element and a plate which is extremely economical to produce.
  • the groove or slot could be formed in the plate rather than the end of the closure element. It is preferred however that it be formed in the closure element since this plate can then be installed during assembly with either side facing up or down. Blockage or clogging of flow passageway is prevented by the normal circumferential movement of plate 62 during the normal operation of the lash adjuster.
  • a hydraulic lash adjuster for an internal combustion engine having a body with an open upper end, a plunger reciprocal within said body, said plunger having a central cavity defining an oil reservoir; oil inlet means communicating with said reservoirya closure element in said open end of said body forming a fulcrum for a rocker arm; flow passageway means from said reservoir to said rocker arm for lubricating said fulcrum and rocker arm; and means for metering the flow of oil through said flow passageway means; the improvement comprising: said flow passageway means comprising a bore through said closure element communicating between the upper and lower end of said closure element; a plate means in the form of a thin flat disc positioned in a space formed between said plunger and closure element below said lower end portion of said closure element and above said reservoir and urged by the oil pressure in said reservoir against said lower end portion of said closure element; said plate means having at least a portion of its diameter less than the diameter of the adjacent wall of the plunger to permit oil flow from said reservoir around the outer circumference of said
  • a hydraulic lash adjuster according to claim 1 wherein said closure element includes an annular shoulder above said plunger having a diameter greater than the bore of said plunger whereby said shoulder limits the downward movement of said closure element in said plunger.
  • a hydraulic lash adjuster according to claim 1 wherein said plate means is positioned on said seat during engine start up and acts as a check valve prior to engine oil pressure being established to prevent air ingestion into said reservoir during engine start up.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US00304035A 1972-11-06 1972-11-06 Hydraulic lash adjuster oil metering means Expired - Lifetime US3799129A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00304035A US3799129A (en) 1972-11-06 1972-11-06 Hydraulic lash adjuster oil metering means
CA183,018A CA992414A (en) 1972-11-06 1973-10-10 Hydraulic lash adjuster oil metering means
AU61542/73A AU471405B2 (en) 1972-11-06 1973-10-18 Hydraulic lash adjuster oil metering means
IT30408/73A IT998839B (it) 1972-11-06 1973-10-22 Dispositivo idraulico di ripresa dei giochi e di dosatura dell olio lubrificante
GB5083573A GB1414429A (en) 1972-11-06 1973-11-01 Hydraulic lash adjuster for ic engine rocker arm
JP48122274A JPS4980443A (fr) 1972-11-06 1973-11-01
FR7339252A FR2205930A5 (fr) 1972-11-06 1973-11-05
BR8650/73A BR7308650D0 (pt) 1972-11-06 1973-11-06 Um regulador de folga hidraulica aperfeicoado
DE19732355379 DE2355379A1 (de) 1972-11-06 1973-11-06 Hydraulischer spielausgleicher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00304035A US3799129A (en) 1972-11-06 1972-11-06 Hydraulic lash adjuster oil metering means

Publications (1)

Publication Number Publication Date
US3799129A true US3799129A (en) 1974-03-26

Family

ID=23174752

Family Applications (1)

Application Number Title Priority Date Filing Date
US00304035A Expired - Lifetime US3799129A (en) 1972-11-06 1972-11-06 Hydraulic lash adjuster oil metering means

Country Status (9)

Country Link
US (1) US3799129A (fr)
JP (1) JPS4980443A (fr)
AU (1) AU471405B2 (fr)
BR (1) BR7308650D0 (fr)
CA (1) CA992414A (fr)
DE (1) DE2355379A1 (fr)
FR (1) FR2205930A5 (fr)
GB (1) GB1414429A (fr)
IT (1) IT998839B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4387675A (en) * 1980-01-28 1983-06-14 Aisin Seiki Kabushiki Kaisha Engine valve actuating mechanism having a hydraulic fulcrum lifting device
US4463714A (en) * 1981-10-08 1984-08-07 Nissan Motor Company, Limited Hydraulic lifter
US4494729A (en) * 1982-02-04 1985-01-22 Volkswagenwerk Aktiengesellschaft Valve operating mechanism, in particular for an automobile internal combustion engine
US4570582A (en) * 1983-02-09 1986-02-18 Motomak Motorenbau, Machinen-Und Werkzeugfabrik Konstruktionen Gmbh Inner element for a hydraulic valve play compensating element
US4840153A (en) * 1987-10-23 1989-06-20 Nippon Seiko Kabushiki Kaisha Hydraulic lash adjuster
US5931132A (en) * 1998-08-24 1999-08-03 Freeland; Mark Hydraulic lash adjuster with pressure relief check valve
US5964193A (en) * 1998-08-20 1999-10-12 Ford Global Technologies, Inc. Synchronous hydraulic lash adjuster
US5967105A (en) * 1998-08-24 1999-10-19 Ford Global Technologies, Inc. Hydraulic lash adjuster with an open ended top plunger surface
US6006710A (en) * 1998-08-31 1999-12-28 Ford Global Technologies, Inc. Hydraulic lash adjuster mechanism with pressure controlled leak down
WO2009154621A1 (fr) * 2008-06-18 2009-12-23 The Timken Company Dispositif de raccordement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714234A (en) * 1982-09-07 1987-12-22 Greatbatch Enterprises, Inc. Low power electromagnetic valve
US4924821A (en) * 1988-12-22 1990-05-15 General Motors Corporation Hydraulic lash adjuster and bridge assembly
JPH02135748U (fr) * 1989-04-17 1990-11-13
DE19529044A1 (de) * 1995-08-08 1997-02-13 Schaeffler Waelzlager Kg Hydraulisches Spielausgleichselement für eine Ventilsteuerung einer Brennkraftmaschine
DE19640919A1 (de) * 1996-10-04 1998-04-09 Schaeffler Waelzlager Ohg Ventiltrieb für eine Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153404A (en) * 1963-12-30 1964-10-20 Gen Motors Corp Hydraulic lash adjuster
US3614942A (en) * 1970-04-20 1971-10-26 Johnson Products Inc Metered mechanical tappet with slotted pushrod seat
US3630179A (en) * 1970-04-20 1971-12-28 Johnson Products Inc Metered mechanical tappet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139078A (en) * 1962-06-20 1964-06-30 Gen Motors Corp Horizontal hydraulic valve lifter
US3151603A (en) * 1963-03-20 1964-10-06 Gen Motors Corp Snap ring retainer means
US3280807A (en) * 1965-10-28 1966-10-25 Lubrizol Corp Metering valve for hydraulic valve lifter
US3439659A (en) * 1967-05-09 1969-04-22 Standard Screw Spiral metering valve
US3430613A (en) * 1967-06-26 1969-03-04 Standard Screw Chrome-plated metering valve
US3450228A (en) * 1967-07-19 1969-06-17 Gen Motors Corp Hydraulic valve lifter
JPS478263U (fr) * 1971-02-23 1972-09-30

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153404A (en) * 1963-12-30 1964-10-20 Gen Motors Corp Hydraulic lash adjuster
US3614942A (en) * 1970-04-20 1971-10-26 Johnson Products Inc Metered mechanical tappet with slotted pushrod seat
US3630179A (en) * 1970-04-20 1971-12-28 Johnson Products Inc Metered mechanical tappet

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4387675A (en) * 1980-01-28 1983-06-14 Aisin Seiki Kabushiki Kaisha Engine valve actuating mechanism having a hydraulic fulcrum lifting device
US4463714A (en) * 1981-10-08 1984-08-07 Nissan Motor Company, Limited Hydraulic lifter
US4494729A (en) * 1982-02-04 1985-01-22 Volkswagenwerk Aktiengesellschaft Valve operating mechanism, in particular for an automobile internal combustion engine
US4570582A (en) * 1983-02-09 1986-02-18 Motomak Motorenbau, Machinen-Und Werkzeugfabrik Konstruktionen Gmbh Inner element for a hydraulic valve play compensating element
US4840153A (en) * 1987-10-23 1989-06-20 Nippon Seiko Kabushiki Kaisha Hydraulic lash adjuster
US5964193A (en) * 1998-08-20 1999-10-12 Ford Global Technologies, Inc. Synchronous hydraulic lash adjuster
US5931132A (en) * 1998-08-24 1999-08-03 Freeland; Mark Hydraulic lash adjuster with pressure relief check valve
US5967105A (en) * 1998-08-24 1999-10-19 Ford Global Technologies, Inc. Hydraulic lash adjuster with an open ended top plunger surface
US6006710A (en) * 1998-08-31 1999-12-28 Ford Global Technologies, Inc. Hydraulic lash adjuster mechanism with pressure controlled leak down
WO2009154621A1 (fr) * 2008-06-18 2009-12-23 The Timken Company Dispositif de raccordement
US20110011361A1 (en) * 2008-06-18 2011-01-20 Koyo Bearings Usa Llc Coupling device

Also Published As

Publication number Publication date
BR7308650D0 (pt) 1974-08-15
AU471405B2 (en) 1976-04-29
IT998839B (it) 1976-02-20
AU6154273A (en) 1975-04-24
GB1414429A (en) 1975-11-19
FR2205930A5 (fr) 1974-05-31
CA992414A (en) 1976-07-06
JPS4980443A (fr) 1974-08-02
DE2355379A1 (de) 1974-05-16

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SPX CORPORATION, A CORP. OF DE.

Free format text: MERGER;ASSIGNORS:SPAR CORPORATION, A CORP. OF DE (MERGED INTO);SEALED POWER CORPORATION, A CORP. OFDE. (CHANGED TO);REEL/FRAME:005164/0083

Effective date: 19880425

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Owner name: KODIAK PARTNERS CORP., A CORP. OF DE, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SPX CORPORATION, A DE CORP.;REEL/FRAME:005125/0002

Effective date: 19890525

AS Assignment

Owner name: CHEMICAL BANK, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:SEALED POWER, TECHNOLOGIES, L.P., A DE LIMITED PARTNERSHIP;REEL/FRAME:005094/0360

Effective date: 19890530

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Owner name: CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT

Free format text: SECURITY INTEREST;ASSIGNOR:SEALED POWER TECHNOLOGIES, L.P.;REEL/FRAME:005106/0271

Effective date: 19890530

AS Assignment

Owner name: SEALED POWER TECHNOLOGIES, L.P., MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KODIAK PPARTNERS CORP.;REEL/FRAME:005208/0100

Effective date: 19890525

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Owner name: SEALED POWER TECHNOLOGIES, L.P.

Free format text: CHANGE OF NAME;ASSIGNOR:SEALED POWER TECHNOLOGIES, L.P.;REEL/FRAME:005134/0125

Effective date: 19890607