US3447524A - Internal combustion engine cylinder head - Google Patents

Internal combustion engine cylinder head Download PDF

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Publication number
US3447524A
US3447524A US637161A US3447524DA US3447524A US 3447524 A US3447524 A US 3447524A US 637161 A US637161 A US 637161A US 3447524D A US3447524D A US 3447524DA US 3447524 A US3447524 A US 3447524A
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US
United States
Prior art keywords
housing
valve
cylinder head
bore
portions
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
US637161A
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English (en)
Inventor
Anton Pfleghaar
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.)
Caterpillar Energy Solutions GmbH
Original Assignee
Motoren Werke Mannheim 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 Motoren Werke Mannheim AG filed Critical Motoren Werke Mannheim AG
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Publication of US3447524A publication Critical patent/US3447524A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/08Valves guides; Sealing of valve stem, e.g. sealing by lubricant
    • F01L3/085Valve cages

Definitions

  • FIG. 1 PFLEGHAAR INTERNAL COMBUSTION ENGINE CYLINDER HEAD Filed May 9, 1967 FIG. 1
  • An internal combustion engine cylinder head has a through bore extending from a top surface to a bottom surface thereof, this bore receiving with a sliding fit a poppet valve housing.
  • An abutment portion of the housing abuts the top surface of the head under the action of bolts attaching the housing to the head.
  • the housing has a guide bore guiding the valve stem.
  • An annular recess is formed coaxially in the lower end of the external periphery of the housing and receives a sealing member which slides on the internal periphery of the first bore during thermal expansion and contraction of the housing relatively to the internal periphery of the bore.
  • This invention relates to an internal combustion engine cylinder head with a cylindrical bore in which is inserted a poppet valve the housing of which is fixed to the cylinder head by way of an external flange.
  • a known apparatus of this 'kind has the valve housing pressed, by means of necked bolts which engage on the external flange and are screwed into a top surface of the cylinder head, against a sealing surface which is situated in the cylinder head underside in the vicinity of the valve seat.
  • the necked bolts and the cylinder head underside are subjected to very high stress and are correspondingly liable to develop cracks particularly in the case of an exhaust valve.
  • the valve housing is readily deformed under the action of the high compressive forces which occur, more particularly if, as is usual, it is weakened at one region by a gas duct. As a result of such deformation, the valve closure member may no longer bear uniformly on its seat and therefore may no longer seal perfectly.
  • the hot exhaust gases flowing through the gap in such a case destroy the the seat surface in a very short time.
  • a combination comprising an internal combustion engine cylinder head, first external surface portions of said cylinder head for bounding a combustion chamber of said engine, second external surface portions of said cylinder head disposed opposite said first external surface portions, portions of said cylinder head defining a bore extending therethrough from said first external surface portions to said second external surface portions, a valve housing mounted in said bore, connecting means connecting said housing to said cylinder head and urging said housing towards said first external surface portions, portions of said valve housing defining a valve port in the region of said first external surface portions and a valve seat encircling said port, other portions of said cylinder head and intermediate portions of said valve housing between said valve seat and said second external surface portions defining a gas duct extending to said valve port, other portions of said valve housing defining a guide bore therein substantially coaxial with said valve seat and extending from said gas duct in a direction away from said valve seat, a valve closure member cooperating with said valve seat,
  • valve housing bearing against said second external surface portions, portions of one of the external peripheral surface of said housing and the internal peripheral surface of the first-mentioned bore defining a substantially annular recess therein substantially coaxial with said first-mentioned bore and in the region of said valve seat, a substantially annular sealing member accommodated in said annular recess and bearing on the other of said external peripheral surface and said internal peripheral surface for sliding on that other surface during longitudinal relative movement between said internal peripheral surface and said external peripheral surface owing to thermal expansion and contraction, said valve housing being a sliding fit in said bore.
  • This problem can be solved by compressing a compressible sealing gasket between a shoulder of the internal peripheral surface of the bore and a shoulder of the external peripheral surface of the housing, these shoulders being located in the vicinity of the valve seat.
  • the sealing member is disposed between the former shoulder and the valve seat.
  • the gasket effects the sealing of the gap between the housing and the receiving bore at the beginning of the working life. Later on, when sutficient oil and carbon has been deposited in thegap, the sealing effect is provided mainly by the slidable sealing member.
  • the gasket preferably consists of a hollow asbestos ring encased in a sheet metal sheath.
  • a good sealing efiect with the slidable sealing member, particularly in the newly,,fitted state when no oil and carbon has yet been deposited, is advantageously achieved by forming the slidable sealing member as a metal ring which is rolled into, or caulked into, an annular recess in the external peripheral surface of the housing. With this construction, it is possible to have the metal ring slightly oversize relatively to the housing-receiving bore, Without making the fitting of the valve housing too difiicult.
  • Reliable bearing of the slidable sealing member in the annular recess and on the internal peripheral surface of the bore when in a hot state is advantageously promoted by making the sealing member of a metal which has a higher coefiicient of thermal expansion than does the material of the housing.
  • the slidable sealing member can be produced by metal spraying.
  • FIGURE 1 is an axial section through a poppet valve of an internal combustion engine
  • FIGURE 2 is a detail of FIGURE 1.
  • the poppet valve includes a housing including an external abutment flange 2.
  • the housing 1 comprises at its lower end 18 the valve seat 3 encircling the valve port and in a sliding fit in a bore 5, 6 of the cylinder head 4.
  • the external peripheral surface of the bore consists of a larger-diameter cylindrical surface portion 5, a smaller-diameter cylindrical surface portion 6 spaced axially from the portion 5, and an annular shoulder 7 connecting the portions and 6.
  • the flange 2 is urged by means of bolts 8 to bear against the top external surface 10 of the cylinder head by way of a sealing element 9.
  • a valve guide 11 of the housing is formed with a guide bore in which the stem of the valve closure member 12 slides.
  • Helical compression springs 13 and 14 which act on the valve closure member 12 by way of a spring plate 15 and a conical clamping sleeve 16, tend to press the valve closure member 12 against the valve seat 3.
  • the valve drive (not shown) depresses a cup-shaped part 17, and the member 12 therewith, downwards.
  • the external peripheral surface of the housing 1 consists of a largerdiameter cylindrical surface portion encircled by the portion 5, a smaller-diameter cylindrical surface portion 21 encircled by the portion 6, and an annular shoulder 19 facing the shoulder 7 and axially spaced therefrom. The faces of the two shoulders 7 and 19 are disposed parallel to each other.
  • a compressible gasket 20 which consists of a hollow asbestos ring encased by a sheet metal sheath.
  • the gasket 20 in its original state is of approximately circular cross-section, but is flattened, at diametrically opposite regions, by the shoulders 7 and 19 when the bolts 8 are tightened.
  • the cross section of the hollow space bounded by the shoulders 7 and 19 is larger than the cross section of the gasket 20.
  • a sealing member 22 Fitted in an annular recess in the surface portion 21 and situated between the shoulder 7 and the valve seat 3 is a sealing member 22 which consists of a copper ring rolled into or caulked into the recess.
  • the annular recess in which the copper ring 22 is situated can have walls so inclined that it Widens towards its base.
  • the surface portions 6 and 21 bound a cylindrical gap 23 which becomes filled with oil and carbon during the operation of the internal combustion engine.
  • the external diameter of the sealing member 22 can be 0.05 mm. larger than the internal diameter of the surface portion 6.
  • a sealing member in the form of a per se known piston ring can be used.
  • apparatus comprising a cylinder head including first external surface portions adapted for bounding said combustion chamber of said engine, said head including second external surface portions opposite to said first external surface portions, said cylinder head including further portions between said first and second portions and defining a bore extending therethrough from said first external surface portions to said second external surface portions, a valve housing slidably mounted in said bore, connecting means connecting said housing to said cylinder head and urging said housing towards said first external surface portions, said valvehousing being provided with a valve port in the region of said first external surface portions and including a valve seat encircling said port, said cylinder head and said valve housing intermediate said valve seat and said second external surface portions defining a gas duct extending to said valve port, said valve housing being further provided with a guide bore at least substantially coaxial with said valve seat and extending from said gas duct in a direction away from said valve seat, a valve closure member cooperating with said valve seat, and a guide stem connected with said valve closure member and longitudinally
  • said gasket includes a hollow asbestos ring and a sheet metal sheath enclosing said asbestos ring.
US637161A 1966-09-22 1967-05-09 Internal combustion engine cylinder head Expired - Lifetime US3447524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0071018 1966-09-22

Publications (1)

Publication Number Publication Date
US3447524A true US3447524A (en) 1969-06-03

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ID=7313746

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US637161A Expired - Lifetime US3447524A (en) 1966-09-22 1967-05-09 Internal combustion engine cylinder head

Country Status (8)

Country Link
US (1) US3447524A (xx)
BE (1) BE696299A (xx)
CH (1) CH458833A (xx)
DE (1) DE1526596A1 (xx)
DK (1) DK117873B (xx)
ES (1) ES337340A1 (xx)
GB (1) GB1179880A (xx)
NL (1) NL6702296A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742927A (en) * 1970-05-27 1973-07-03 Semt Valve for an internal combustion engine or the like
US4000730A (en) * 1974-03-07 1977-01-04 Maschinenfabrik Augsburg-Nurnberg Ag Valve cage structure for internal combustion engines, particularly adapted for fluid cooling
US5701930A (en) * 1995-05-01 1997-12-30 Russell; Robert L. Modular valve assembly
US10527007B2 (en) 2015-06-29 2020-01-07 Russel Energy Corporation Internal combustion engine/generator with pressure boost

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641460C2 (de) * 1976-09-15 1986-06-12 Klöckner-Humboldt-Deutz AG, 5000 Köln Anordnung zur Befestigung von Ventilkörben in zylindrischen Aufnahmebohrungen im Zylinderkopf einer Hubkolbenbrennkraftmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19034C (de) * E. MÜLLER-SCHIEDMAYER in Würzburg Vorrichtung zur Uebertragung der Schwingungen des vorderen Resonanzbodens auf einen dahinter liegenden Resonanzboden anPianinos
US1040508A (en) * 1911-03-20 1912-10-08 Charles Otto Baxter Internal-combustion engine.
GB191318778A (en) * 1913-08-19 1914-07-09 Robert Walker Smith Improvements in or relating to the Cylinders of Internal Combustion Engines.
DE390520C (de) * 1922-09-23 1924-02-20 Norddeutsche Kuehlerfabrik Akt Kolbenring
AT103663B (de) * 1925-06-02 1926-07-10 Krupp Ag Dichtungs- und Packungsmaterial.
US1752790A (en) * 1926-01-28 1930-04-01 Adrian C Estep Valve cage
US1893209A (en) * 1932-05-11 1933-01-03 Ingersoll Rand Co Valve cage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19034C (de) * E. MÜLLER-SCHIEDMAYER in Würzburg Vorrichtung zur Uebertragung der Schwingungen des vorderen Resonanzbodens auf einen dahinter liegenden Resonanzboden anPianinos
US1040508A (en) * 1911-03-20 1912-10-08 Charles Otto Baxter Internal-combustion engine.
GB191318778A (en) * 1913-08-19 1914-07-09 Robert Walker Smith Improvements in or relating to the Cylinders of Internal Combustion Engines.
DE390520C (de) * 1922-09-23 1924-02-20 Norddeutsche Kuehlerfabrik Akt Kolbenring
AT103663B (de) * 1925-06-02 1926-07-10 Krupp Ag Dichtungs- und Packungsmaterial.
US1752790A (en) * 1926-01-28 1930-04-01 Adrian C Estep Valve cage
US1893209A (en) * 1932-05-11 1933-01-03 Ingersoll Rand Co Valve cage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742927A (en) * 1970-05-27 1973-07-03 Semt Valve for an internal combustion engine or the like
US4000730A (en) * 1974-03-07 1977-01-04 Maschinenfabrik Augsburg-Nurnberg Ag Valve cage structure for internal combustion engines, particularly adapted for fluid cooling
US5701930A (en) * 1995-05-01 1997-12-30 Russell; Robert L. Modular valve assembly
US10527007B2 (en) 2015-06-29 2020-01-07 Russel Energy Corporation Internal combustion engine/generator with pressure boost

Also Published As

Publication number Publication date
GB1179880A (en) 1970-02-04
DK117873B (da) 1970-06-08
ES337340A1 (es) 1968-02-16
CH458833A (de) 1968-06-30
BE696299A (xx) 1967-09-01
NL6702296A (xx) 1968-03-25
DE1526596A1 (de) 1972-02-24

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