US3802404A - Internal-combustion cylinder head assemblies - Google Patents

Internal-combustion cylinder head assemblies Download PDF

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US3802404A
US3802404A US00213011A US21301171A US3802404A US 3802404 A US3802404 A US 3802404A US 00213011 A US00213011 A US 00213011A US 21301171 A US21301171 A US 21301171A US 3802404 A US3802404 A US 3802404A
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axis
valve
passage
frusto
upstream
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US00213011A
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A Grosseau
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Automobiles Citroen SA
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Automobiles Citroen SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • An mternal-combnstton engine cylinder head assembiy comprises an induction passage having two per- 123/1881, i93H hens in the form of surfaces of revolution generated 56 I References Cited about different axes. The axis of the downstream portion is coincident with the axis of the inlet vaIve.
  • PA TENTS the plane of symmetry of the passage contains the axis 3.429.303 2/1969 Roberts 123/193 H 0f the valve and the axis of the engine cylinder, 1,088.25) 2/1914 Brown 123/188 GC 3,444,852 5/1969 Henry-Biaband .i 123/188 M 10 Claims, 4 Drawing Figures PATENTEDAPR 9 i974 SHEET 2 [IF 4 INTERNAL-COMBUSTION CYLINDER HEAD ASSEMBLIES BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cylinder head assemblies for internal-combustion engines.
  • Induction passages within the cylinder head should create only very small pressure drops, as can be ensured by uniformly shaping the passage cross-section, and by providing steady and smooth progressions from section to section and a good surface finish on the passage walls.
  • the dimensions and surface finish of the induction passages feeding each of the cylinders should vary within the narrowest possible limits, being to all intents and purposes identical for all cylinders, failing which there may be a serious lack of bal' ance, such as to prevent proper running and to shorten the life of the engine.
  • This identity of dimensions and surface finish must also be preserved from engine to engine, to avoid variation in the maximum output power of identical engines.
  • the cylinder heads of high-power engines can be made of aluminum alloy.
  • pressure casting enables correct shaping and surface finish to be obtained.
  • the mould stripping conditions prevent the desired shapes from being achieved without resort to expedients such as, a joint-plane extending into the induction passage or a separately fitted passage.
  • An object of the present invention is to provide a cylinder head assembly having at least one induction passage in which the flow cross-section steadily increases in area from the point of admission to the cylinder head to the valve seat, but which can nevertheless readily be machined in mass production.
  • an internal-combustion engine cylinder head assembly defining at least one induction passage for feeding fuel-air mixture to an engine cylinder, and an inlet valve controlling flow through the induction passage, said induction passage being symmetrical about a plane containing the axis of the cylinder and the axis of the inlet valve, and having a first or upstream portion in the form of a surface of revolution generated about a first axis, and a second portion downstream from the first portion and in the form of a surface of revolution generated about a second axis coincident with the axis of the inlet valve.
  • the two portions of the passage can be interconnected by a portion of a sphere to which they are tangential. They may be frusto conical at least for part of their length.
  • the cylinder head contains three successive portions in the form of surfaces of revolution generated about different axes.
  • the first or upstream portion in the direction of flow and the intermediate portion preferably being interconnected by a portion of a sphere to which they are tangential.
  • FIG. 1 is a fragmentary cross-section of one embodiment of a cylinder head assembly in accordance with the invention, the section being taken on a plane containing the axis of an inlet valve and cylinder of the associated engine;
  • FIG. 2 is an elevation showing the shape of an induction passage, of the cylinder head
  • FIG. 3 is a fragmentary cross-section similar to FIG. 1, of another embodiment of a cylinder head assembly.
  • FIG. 4 is a section taken on line A-A of FIG. 3.
  • a cylinder head assembly 1 to be positioned at one end of a cylinder having an axis OX, has a machined induction passage 2, and an exhaust passage 3.
  • the induction passage 2 ends in a venturishaped seat 4, for an inlet valve 5, the stem 6 of which moves in the direction of its longitudinal axis OY.
  • the induction passage 2 is symmetrical about a plane containing the axes OX and CY.
  • the induction passage 2 comprises, taken in the direction of How of the fuelair mixture, a cylindrical portion 20 having an axis 22, joined by a toroidal surface 2b, to a frusto-conical portion 2c, co-axial with the cylindrical portion 2a; the frusto-conical portion 2c lies within the acute angle formed between the axis CY and a line extending at right angles to the axis OK.
  • the portion 20 is tangential to a portion 212 which forms part of a sphere I having its centre at 8, the point of intersection of the axes CY and 22..
  • the diameter of this sphere is slightly smaller than D, the diameter of the upstream edge of the seat 4.
  • the spherical portion M is joined to the seat 4 by a frusto-conical portion 2e having a base diameter D.
  • the portion 2e is followed by a short cylindrical portion 2f, the axes of the portions 2e and 2f being coincident with the axis 0! and being interconnected by a toroidal portion 23.
  • the frustoconical portion 2c meets the frusto-conical portion 2: along a curve 9.
  • the passage 2 can readily be machined for mass production purposes in two stages, namely by boring along the axis 22 using an expanding tool, the advance of which is programmed according to the profile desired, and by milling along the axis OY with a ballended profile cutter.
  • the induction passage 2 in the cylinder head assembly shown in FIGS. 3 and 4 is likewise symmetrical about a plane containing the axes OX and CY. it comprises, taken in the direction flow, a cylindrical portion Za having an axis Z,-Z,, connected by a toroidal surface 2'b to a frusto-conical portion, tangential c co-axial with the cylindrical portion 2'a.
  • the portion 2'0 is tangnetial to a portion 2'd, which forms part of a sphere 7 having its centre at 8.
  • the spherical portion 2'd is joined to a portion Z'e, having an axis 2 -2,, the latter lying between the axes Z,Z and OY and passing through the centre 8.
  • the portion Z'e is cylindrical (but can alternatively be frusto-conical) and meets the portion 2'c which it intersects along the curve 9'.
  • the portion 2'e is joined to the seat 4 by a frustoconical portion 2f which is followed by another cylindrical portion 2'g, the axis of these last two portions being co-incident with the axis OY.
  • the present invention is not limited to the embodiments described and illustrated.
  • the surfaces of revolution which form the induction passage 2 could have different longitudinal mid-planes, provided that the axis of revolution of the downstream portion or portions coincide with the axis OY.
  • An internal combustion engine intake passage for a cylinder comprising:
  • valve adapted to contact said seat to close and open said passage, said valve being positioned with its longitudinal axis intersecting the axis of the cylinder at an angle;
  • said upstream portion being defined by a first surface of revolution generated about a first linear axis longitudinally disposed within and extending the entire length of said upstream portion and intersecting said longitudinal valve axis at an angle;
  • said intermediate portion being defined by a second surface of revolution generated about a second linear axis longitudinally disposed within and extending the entire length of said intermediate portion and intersecting said first axis and said longitudinal valve axis at different angles;
  • downstream portion being defined by a third surface of revolution generated about a third linear axis longitudinally disposed within and extending the entire length of said downstream portion and coincident with said longitudinal axis of said valve;
  • valve seat is of venturi shape.
  • downstream portion further comprises a cylindrical portion connecting said frusto-conical portion to said valve seat.
  • downstream portion of said passage comprises a frustoconical portion and a cylindrical portion, said frustoconical portion of said downstream portion being con nected to said intermediate portion of said passage and said cylindrical portion connecting said frusto-conical portion to said valve seat, said intermediate portion and said cylindrical portion and said frusto-conical portion of said downstream portion intersecting said plane containing said axis of said cylinder and said longitudinal axis of said valve at a point lying on said plane.
  • said passage further comprises a partially spherical portion disposed between and connecting said upstream and intermediate portions, said upstream and intermediate portions being tangential to said partially spherical portion.

Abstract

An internal-combustion engine cylinder head assembly comprises an induction passage having two portions in the form of surfaces of revolution generated about different axes. The axis of the downstream portion is coincident with the axis of the inlet valve, and the plane of symmetry of the passage contains the axis of the valve and the axis of the engine cylinder.

Description

United States Patent Grosseau {45} Apr. 9, 1974 [5 1 INTERNAL-COMBUSTION CYLINDER 2,865,354 12/1958 Frank 123/188 0c HEAD ASSEMBLES 3.422.805 1/1969 Dzianott 1. 123/188 M [75] Inventor: Aibert Grosseau, Chaviile. France FOREIGN PATENTS OR APPLICATIONS 73 Assigneel Societe Anonyme Auwmobiles 1.015.555 1/1966 Great Britainnflumnnnn 123/188 M Citroen, Paris. France Primary Examiner-Laurence M. Goodridge [22] Ffled' 1971 Attorney, Agent, or Firm-Arnold Robinson; William [21] Appli No: 213,011 D. Lucas; Frank J. DeRosa [52] US. C1. 123/193 H [57} ABSTRAC! [51 1 Int. Cl. F02f 1/00 {58} Field 0 searchmn 2388 M, 188 GC 188 S, An mternal-combnstton engine cylinder head assembiy comprises an induction passage having two per- 123/1881, i93H hens in the form of surfaces of revolution generated 56 I References Cited about different axes. The axis of the downstream portion is coincident with the axis of the inlet vaIve. and UMTED STATES PA TENTS the plane of symmetry of the passage contains the axis 3.429.303 2/1969 Roberts 123/193 H 0f the valve and the axis of the engine cylinder, 1,088.25) 2/1914 Brown 123/188 GC 3,444,852 5/1969 Henry-Biaband .i 123/188 M 10 Claims, 4 Drawing Figures PATENTEDAPR 9 i974 SHEET 2 [IF 4 INTERNAL-COMBUSTION CYLINDER HEAD ASSEMBLIES BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cylinder head assemblies for internal-combustion engines.
2. Description of the Prior Art To obtain from an internal-combustion engine a high specific power, equal to at least 80 HP. S.A.E., for example, it is necessary that the cylinders be satisfactorily charged with fuel-air mixture. The conditions to be fulfilled for this purpose are easier to provide in the portion of the induction system which lies outside the cylinder head than for the portion within the cylinder head since the shape and surface finish of induction passages externally of the cylinder head can be provided as desired.
Induction passages within the cylinder head should create only very small pressure drops, as can be ensured by uniformly shaping the passage cross-section, and by providing steady and smooth progressions from section to section and a good surface finish on the passage walls.
In any given engine, the dimensions and surface finish of the induction passages feeding each of the cylinders should vary within the narrowest possible limits, being to all intents and purposes identical for all cylinders, failing which there may be a serious lack of bal' ance, such as to prevent proper running and to shorten the life of the engine. This identity of dimensions and surface finish must also be preserved from engine to engine, to avoid variation in the maximum output power of identical engines.
The cylinder heads of high-power engines can be made of aluminum alloy. In mass production, pressure casting enables correct shaping and surface finish to be obtained. The mould stripping conditions, however, prevent the desired shapes from being achieved without resort to expedients such as, a joint-plane extending into the induction passage or a separately fitted passage.
It has been found experimentally that optimum specific power is obtained from an induction passage that is of circular section throughout, the cross-sectional area increasing steadily in the direction of flow. Such passages can be produced by final dressing, as practised in the case of racing engines. Protracted, highly delicate work wiil yield a proper surface finish, but it will not ensure uniformity between the shaping of one passage and the next.
The use of pressure casting, with a joint-plane within the passage, not only necessitates additional parts, but adversely affects the maximum power output because of the irregularities introduced by the joint.
An object of the present invention is to provide a cylinder head assembly having at least one induction passage in which the flow cross-section steadily increases in area from the point of admission to the cylinder head to the valve seat, but which can nevertheless readily be machined in mass production.
SUMMARY OF THE INVENTION According to the present invention, there is provided in an internal-combustion engine cylinder head assembly means defining at least one induction passage for feeding fuel-air mixture to an engine cylinder, and an inlet valve controlling flow through the induction passage, said induction passage being symmetrical about a plane containing the axis of the cylinder and the axis of the inlet valve, and having a first or upstream portion in the form of a surface of revolution generated about a first axis, and a second portion downstream from the first portion and in the form of a surface of revolution generated about a second axis coincident with the axis of the inlet valve.
The two portions of the passage can be interconnected by a portion of a sphere to which they are tangential. They may be frusto conical at least for part of their length.
in one preferred embodiment of the invention, the cylinder head contains three successive portions in the form of surfaces of revolution generated about different axes. The first or upstream portion in the direction of flow and the intermediate portion preferably being interconnected by a portion of a sphere to which they are tangential.
BRIEF DESCRIPTION OF THE DRAWINGS Embodiments of the invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings, in which:
FIG. 1 is a fragmentary cross-section of one embodiment of a cylinder head assembly in accordance with the invention, the section being taken on a plane containing the axis of an inlet valve and cylinder of the associated engine;
FIG. 2 is an elevation showing the shape of an induction passage, of the cylinder head;
FIG. 3 is a fragmentary cross-section similar to FIG. 1, of another embodiment of a cylinder head assembly; and
FIG. 4 is a section taken on line A-A of FIG. 3.
DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. I a cylinder head assembly 1 to be positioned at one end of a cylinder having an axis OX, has a machined induction passage 2, and an exhaust passage 3. The induction passage 2 ends in a venturishaped seat 4, for an inlet valve 5, the stem 6 of which moves in the direction of its longitudinal axis OY.
The induction passage 2 is symmetrical about a plane containing the axes OX and CY. The induction passage 2 comprises, taken in the direction of How of the fuelair mixture, a cylindrical portion 20 having an axis 22, joined by a toroidal surface 2b, to a frusto-conical portion 2c, co-axial with the cylindrical portion 2a; the frusto-conical portion 2c lies within the acute angle formed between the axis CY and a line extending at right angles to the axis OK. The portion 20 is tangential to a portion 212 which forms part of a sphere I having its centre at 8, the point of intersection of the axes CY and 22.. The diameter of this sphere is slightly smaller than D, the diameter of the upstream edge of the seat 4. The spherical portion M is joined to the seat 4 by a frusto-conical portion 2e having a base diameter D. The portion 2e is followed by a short cylindrical portion 2f, the axes of the portions 2e and 2f being coincident with the axis 0! and being interconnected by a toroidal portion 23. As can be seen from FIG. 2, the frustoconical portion 2c meets the frusto-conical portion 2: along a curve 9.
It can also be seen, from FIGS. 1 and 2, that a point on the curve 9 situated in the plane of symmetry of the passage 2 (the plane of FIG. 1) also lies on the cylindrical portion 2f.
Calculation of the various cross-sectional areas of the passage 2 shows that the cross-sectional area increases substantially uniformly in the direction flow, reaching a maximum at the connection to the seat 4; it is thus possible to obtain high values of specific power. Moreover, the passage 2 can readily be machined for mass production purposes in two stages, namely by boring along the axis 22 using an expanding tool, the advance of which is programmed according to the profile desired, and by milling along the axis OY with a ballended profile cutter.
The induction passage 2 in the cylinder head assembly shown in FIGS. 3 and 4 is likewise symmetrical about a plane containing the axes OX and CY. it comprises, taken in the direction flow, a cylindrical portion Za having an axis Z,-Z,, connected by a toroidal surface 2'b to a frusto-conical portion, tangential c co-axial with the cylindrical portion 2'a. The portion 2'0 is tangnetial to a portion 2'd, which forms part of a sphere 7 having its centre at 8.
The spherical portion 2'd is joined to a portion Z'e, having an axis 2 -2,, the latter lying between the axes Z,Z and OY and passing through the centre 8. As shown, the portion Z'e is cylindrical (but can alternatively be frusto-conical) and meets the portion 2'c which it intersects along the curve 9'.
The portion 2'e is joined to the seat 4 by a frustoconical portion 2f which is followed by another cylindrical portion 2'g, the axis of these last two portions being co-incident with the axis OY. The portions 2's and Z'fintersect along a curve 10.
The present invention is not limited to the embodiments described and illustrated. For example, the surfaces of revolution which form the induction passage 2 could have different longitudinal mid-planes, provided that the axis of revolution of the downstream portion or portions coincide with the axis OY.
What is claimed is:
I. An internal combustion engine intake passage for a cylinder comprising:
a. an upstream portion;
b. an intermediate portion connected to said upstream portion and in open communication therewith;
c. a downstream portion connected at the downstream end of said intermediate portion and in open communication therewith;
d. a valve seat positioned at the downstream end of said downstream portion;
e. a valve adapted to contact said seat to close and open said passage, said valve being positioned with its longitudinal axis intersecting the axis of the cylinder at an angle;
f. the cross-sectional area of said passage substantially increasing in the direction of flow from said upstream portion to said valve seat;
g. said upstream portion being defined by a first surface of revolution generated about a first linear axis longitudinally disposed within and extending the entire length of said upstream portion and intersecting said longitudinal valve axis at an angle;
h. said intermediate portion being defined by a second surface of revolution generated about a second linear axis longitudinally disposed within and extending the entire length of said intermediate portion and intersecting said first axis and said longitudinal valve axis at different angles;
i. said downstream portion being defined by a third surface of revolution generated about a third linear axis longitudinally disposed within and extending the entire length of said downstream portion and coincident with said longitudinal axis of said valve; and
j. said upstream, intermediate and downstream portions being symmetrical about a plane containing said cylinder axis and said longitudinal valve axis.
2. An assembly as claimed in claim I, in which said valve seat is of venturi shape.
3. An assembly as claimed in claim 1 in which said upstream portion of the passage is frusto-conical at least for part of its length.
4. An assembly as claimed in claim 3, in which said upstream portion comprises a cylindrical portion connected to said frusto-conical portion.
5. An assembly as claimed in claim 4, in which said upstream portion comprises a toroidal portion connecting said cylindrical portion to said frusto-conical portion.
6. An assembly as claimed in claim 1 in which said downstream portion of the passage is frusto-conical, at least for part of its length.
7. An assembly as claimed in claim 6 wherein said downstream portion further comprises a cylindrical portion connecting said frusto-conical portion to said valve seat.
8. An assembly as claimed in claim 1 in which said longitudinal axis of said valve is inclined in relation to said axis of said cylinder and said first axis is situated in the acute angle formed between said longitudinal axis of said valve and an imaginary line extending at right angles to said axis of said cylinder.
9. An assembly as claimed in claim 1 wherein said downstream portion of said passage comprises a frustoconical portion and a cylindrical portion, said frustoconical portion of said downstream portion being con nected to said intermediate portion of said passage and said cylindrical portion connecting said frusto-conical portion to said valve seat, said intermediate portion and said cylindrical portion and said frusto-conical portion of said downstream portion intersecting said plane containing said axis of said cylinder and said longitudinal axis of said valve at a point lying on said plane.
10. An assembly as claimed in claim I in which said passage further comprises a partially spherical portion disposed between and connecting said upstream and intermediate portions, said upstream and intermediate portions being tangential to said partially spherical portion.
a s w a UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION April 9 1974 Patent No. 3 802 404 Dated Inventor(s) Albert Grosseau It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
In Column 1 before [52] insert "Foreign Application Priority Data December 30, 1970 France .47682/70 December 8, 1971 rance ,44763/71" Signed and sealed this 1st day of October 1974,
(SEAL) Attest:
McCOY M. GIBSON JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents

Claims (10)

1. An internal combustion engine intake passage for a cylinder comprising: a. an upstream portion; b. an intermediate portion connected to said upstream portion and in open communication therewith; c. a downstream portion connected at the downstream end of said intermediate portion and in open communication therewith; d. a valve seat positioned at the downstream end of said downstream portion; e. a valve adapted to contact said seat to close and open said passage, said valve being positioned with its longitudinal axis intersecting the axis of the cylinder at an angle; f. the cross-sectional area of said passage substantially increasing in the direction of flow from said upstream portion to said valve seat; g. said upstream portion being defined by a first surface of revolution generated about a first linear axis longitudinally disposed within and extending the entire length of said upstream portion and intersecting said longitudinal valve axis at an angle; h. said intermediate portion being defined by a second surface of revolution generated about a second linear axis longitudinally disposed within and extending the entire length of said intermediate portion and intersecting said first axis and said longitudinal valve axis at different angles; i. said downstream portion being defined by a third surface of revolution generated about a third linear axis longitudinally disposed within and extending the entire length of said downstream portion and coincident with said longitudinal axis of said valve; and j. said upstream, intermediate and downstream portions being symmetrical about a plane containing said cylinder axis and said longitudinal valve axis.
2. An assembly as claimed in claim 1, in which said valve seat is of venturi shape.
3. An assembly as claimed in claim 1 in which said upstream portion of the passage is frusto-conical at least for part of its length.
4. An assembly as claimed in claim 3, in which said upstream portion comprises a cylindrical portion connected to said frusto-conical portion.
5. An assembly as claimed in claim 4, in which said upstream portion comprises a toroidal portion connecting said cylindrical portion to said frusto-conical portion.
6. An assembly as claimed in claim 1 in which said downstream portion of the passage is frusto-conical, at least for part of its length.
7. An assembly as claimed in claim 6 wherein said downstream portion further comprises a cylindrical portion connecting said frusto-conical portion to said valve seat.
8. An assembly as claimed in claim 1 in which said longitudinal axis of said valve is inclined in relation to said axis of said cylinder and said first axis is situated in the acute angle formed between said longitudinal axis of said valve and an imaginary line extending at right angles to said axis of said cylinder.
9. An assembly as claimed in claim 1 wherein said downstream portion of said passage comprises a frusto-conical portion and a cylindrical portion, said frusto-conical portion of said downstream portion being connected to said intermediate portion of said passage and said cylindrical portion connecting said frusto-conical portion to said valve seat, said intermediate portion and said cylindrical portion and said frusto-conical portion of said downstream portion intersecting said plane containing said axis of said cylinder and said longitudinal axis of said valve at a point lying on said plane.
10. An assembly as claimed in claim 1 in which said passage further comprises a partially spherical portion disposed between and connecting said upstream and intermediate portions, said upstream and intermediate portions being tangential to said partially spherical portion.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366787A (en) * 1978-05-31 1983-01-04 Ricardo Consulting Engineers Limited Inlet ports in I.C. engines
EP0096015A2 (en) * 1982-05-31 1983-12-07 FIAT AUTO S.p.A. Cylinder head for a direct-injection diesel engine for motor vehicles
US20040221830A1 (en) * 2003-05-06 2004-11-11 Cummins Inc. Cylinder head with machined intake port and process for manufacturing
EP2108788A1 (en) * 2008-04-09 2009-10-14 Peugeot Citroën Automobiles S.A. Internal combustion engine comprising intake conduits machined on a chamfer
WO2020185337A1 (en) * 2019-03-13 2020-09-17 Caterpillar Inc. Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession
CN112392568A (en) * 2019-08-19 2021-02-23 卡特彼勒公司 Valve seat insert for long life natural gas lean burn engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1088259A (en) * 1911-06-19 1914-02-24 Julian S Brown Internal-combustion engine.
US2865354A (en) * 1958-02-19 1958-12-23 Gen Motors Corp Intake valve vent means
GB1015555A (en) * 1963-11-15 1966-01-05 Ford Motor Co Internal combustion engine
US3422805A (en) * 1966-11-16 1969-01-21 Int Harvester Co Engine inlet passage swirl device
US3429303A (en) * 1967-02-23 1969-02-25 Charles G Roberts Internal combustion engine with improved intake and exhaust
US3444852A (en) * 1966-02-17 1969-05-20 Citroen Sa Andre Internal-combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1088259A (en) * 1911-06-19 1914-02-24 Julian S Brown Internal-combustion engine.
US2865354A (en) * 1958-02-19 1958-12-23 Gen Motors Corp Intake valve vent means
GB1015555A (en) * 1963-11-15 1966-01-05 Ford Motor Co Internal combustion engine
US3444852A (en) * 1966-02-17 1969-05-20 Citroen Sa Andre Internal-combustion engine
US3422805A (en) * 1966-11-16 1969-01-21 Int Harvester Co Engine inlet passage swirl device
US3429303A (en) * 1967-02-23 1969-02-25 Charles G Roberts Internal combustion engine with improved intake and exhaust

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366787A (en) * 1978-05-31 1983-01-04 Ricardo Consulting Engineers Limited Inlet ports in I.C. engines
EP0096015A2 (en) * 1982-05-31 1983-12-07 FIAT AUTO S.p.A. Cylinder head for a direct-injection diesel engine for motor vehicles
EP0096015A3 (en) * 1982-05-31 1985-01-09 FIAT AUTO S.p.A. Cylinder head for a direct-injection diesel engine for motor vehicles
US20040221830A1 (en) * 2003-05-06 2004-11-11 Cummins Inc. Cylinder head with machined intake port and process for manufacturing
EP2108788A1 (en) * 2008-04-09 2009-10-14 Peugeot Citroën Automobiles S.A. Internal combustion engine comprising intake conduits machined on a chamfer
FR2929990A1 (en) * 2008-04-09 2009-10-16 Peugeot Citroen Automobiles Sa INTERNAL COMBUSTION ENGINE COMPRISING CHAMFER INJECTION DUCTS
WO2020185337A1 (en) * 2019-03-13 2020-09-17 Caterpillar Inc. Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession
US11060425B2 (en) 2019-03-13 2021-07-13 Caterpillar Inc. Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession
CN112392568A (en) * 2019-08-19 2021-02-23 卡特彼勒公司 Valve seat insert for long life natural gas lean burn engine

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