Material Or Structure Patents (Class 123/188.3)
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Publication number: 20040103876Abstract: This invention concerns an internal combustion engine, especially an Otto engine, especially of a motor vehicle, with a fuel injector (40), which is arranged and designed in such a way that it injects the fuel (42) directly into a combustion chamber (16) of working cylinders (14) of the internal combustion engine, and with at least one intake valve unit per working cylinder (14), which comprises an intake valve and an intake valve seat. In this regard, at least one intake valve unit is designed with means that hinder heat dissipation in such a way that increased surface temperatures of more than 380° C. develop in the area of the neck (68) of the intake valve (20) in at least one predetermined region (112) of the load-speed characteristic diagram.Type: ApplicationFiled: November 28, 2003Publication date: June 3, 2004Inventors: Leo Spiegel, Gunter Sohlke, Gerrit Suck
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Patent number: 6729287Abstract: A connection between a shaft end of a gas exchange valve of an internal combustion engine and a sleevelike actuating piston of a valve actuator, has at least two shell-like key pieces, surrounding the shaft end and on whose radially outer circumferential surface there is a conically tapering portion, pointing away from a combustion chamber of the engine, and extending in complementary fashion to the cone angle of a radially inner conical portion of a conical fastening sleeve that includes the key pieces, and the conical fastening sleeve and the key pieces can be braced axially against one another. Protrusions and recesses engaging one another are provided on the radially inner circumferential surface of the key pieces and on the radially outer circumferential surface of the shaft end of the gas exchange valve. The conical fastening sleeve is formed by the actuating piston and the actuating piston and the key pieces have threaded portions that can be screwed into one another.Type: GrantFiled: May 23, 2003Date of Patent: May 4, 2004Assignee: Robert Bosch GmbHInventors: Uwe Hammer, Sevan Tatiyosyan, Volker Beuche, Peter Lang, Stefan Reimer
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Patent number: 6718932Abstract: A lightweight engine poppet valve that has a valve head portion made from a lightweight, heat resistant material is attached to a hollow tube stem portion. The attachment is made with a mechanically locking interfitting joint on an extending portion of the valve head at a preselected distance. Preferably, the mechanically locking interfitting joint is a hydroformed joint.Type: GrantFiled: January 24, 2003Date of Patent: April 13, 2004Assignee: Eaton CorporationInventors: Majo Cecur, Marco Querio, Sinharoy Shubhayu, Sundaram L. Narasimhan, Jose F. Masello
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Patent number: 6694961Abstract: An internal combustion engine including a combustion chamber, an intake air passage communicated with the combustion chamber, an intake valve having a thermal insulator at an air-exposure portion thereof which is opposed to the intake air passage, a fuel injector disposed within the intake air passage and operative to inject an amount of fuel toward the air-exposure portion of the intake valve at a fuel injection timing, and a controller in communication with the fuel injector. The controller is programmed to set the fuel injection timing of the fuel injector to an engine intake stroke.Type: GrantFiled: February 12, 2002Date of Patent: February 24, 2004Assignee: Nissan Motor Co., Ltd.Inventors: Hajime Miura, Makoto Yasunaga
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Publication number: 20040031461Abstract: A valve (10) for use in an internal combustion engine comprises a base metal. The base metal is covered with a thin, dense chromium coating.Type: ApplicationFiled: August 19, 2002Publication date: February 19, 2004Applicant: TRW Inc.Inventors: Frank J. Savel, Robert C. McLaren, Doug Mellema
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Patent number: 6679219Abstract: An intake and exhaust valve for an internal combustion engine is provided wherein the stem longitudinal axis is offset from the valve head center. Alternatively, the valve head may have an end having a planar surface wherein the axis and the surface are not perpendicular. Alternatively, the valve head may have an irregular perimeter having a straight edge, and another edge being rounded and generally radiused to the straight edge. Alternatively, the valve head may have a stepped, non-planar shape with respect to the plane of the face of the head. Alternatively, the valve head may have a shape that is pie-shaped. Alternatively, the stem longitudinal axis may be offset from the center point of the valve head, and the valve head may have an end having a planar surface, wherein the longitudinal axis and the planar surface are not perpendicular to one another.Type: GrantFiled: November 22, 2002Date of Patent: January 20, 2004Inventor: Louis A. Pacinelli
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Patent number: 6679478Abstract: In order to propose a hollow poppet valve having an excellent, high strength to weight properties by constructing it in order that no influence from welding heat is exerted onto the face, and no stress is concentrated at the welded portion, and a method for manufacturing the same valve, a fillet area 14 opened like a flare is integrally formed at one end of the cylindrical stem portion 12, and a cap is integrally welded to the open edge portion of the fillet area, wherein only the open edge portion of the fillet area 14 is made thicker than the other portions, and the face 15 is formed on the thicker portion 30. Thereby, it is possible to prevent the hardness of the face 15 from being lowered due to the cap welding heat, and stress from being concentrated at the welded portion, whereby the property of high strength to weight can be improved.Type: GrantFiled: December 6, 2001Date of Patent: January 20, 2004Assignee: Nittan Valve Co., Ltd.Inventor: Takemi Murayama
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Patent number: 6675757Abstract: A valve having a sleeve-like screening element for protecting an internal combustion engine against deposits in a region extending up from a hollow throat to a stripping edge. The screening element has a separate contactor guide surface for the combustion air supplied to the combustion chamber whose surface temperature is lower than the critical temperature for deposits at which fuel particles coke.Type: GrantFiled: January 30, 2002Date of Patent: January 13, 2004Assignee: TRW Deutschland GmbHInventors: Axel Linke, Stefan Kellermann
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Publication number: 20040004205Abstract: A valve stem and gasket apparatus and method includes a gasket that may be made of PEEK. A tool block set can be used to install the gasket over a flange on the stem.Type: ApplicationFiled: July 3, 2002Publication date: January 8, 2004Applicant: United Dominion Industries, Inc.Inventor: Russell F. Kuzniar
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Patent number: 6659059Abstract: A variable displacement valve seat that consists of an annular ring which is affixed concentrically around a standard valve seat. The annular ring is affixed loosely to allow linear coaxial movement along the valve seat center-axis line. The movement is restricted to a small fraction of the valves actual displacement, approximately 12% or less, in the preferred embodiment. The annular ring is affixed to the valve seat insert installed in the cylinder head when used on the exhaust side. The annular ring is affixed to the head portion of the poppet valve itself when used on the intake side. The concept can provide an effective range of early closing times for the valves to control reversion. In addition, the actuation of the moveable seat is variable and automatic, and controlled by cycle exchange functions.Type: GrantFiled: November 21, 2000Date of Patent: December 9, 2003Assignee: EnginTec, CorpInventor: Reggie Dwayne Huff
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Patent number: 6655369Abstract: A coating and coating process to improve the efficiency of hydrocarbon fueled engines, wherein the coating includes a high percentage of nickel to create a reaction which improves the combustion efficiency of the hydrocarbon fuel. The coating may also include chromium, iron, and other constituents and is applied to combustion surfaces with a sufficient bonding strength to allow the coating to function in the combustion chamber, while providing a surface having sufficient surface roughness to promote the chemical reaction underlying the combustion efficiency improvement. The nickel causes a catalytic cracking reaction to ease the combustibility of hydrocarbon molecules in the fuel.Type: GrantFiled: August 1, 2001Date of Patent: December 2, 2003Assignee: Diesel Engine Transformations LLCInventors: Lionel M. Gillston, Ronald P. Pacitti, Richard D. Pacitti
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Patent number: 6634619Abstract: A pressure control valve having a cage with an inlet and an outlet in fluid communication with an engine oil circuit is disclosed. The pressure control valve further has a spool in sliding engagement within the cage which blocks fluid communication between the inlet and the outlet when the spool is in the first position and places the inlet in fluid communication with the outlet when the spool is in the second position. A thin film coating is applied to an outer surface of the spool. The pressure control valve yet further has an actuator which controls movement of the spool slides from the first position to the second position. The coating reduces wear on the outer surface of the spool due to exposure of the spool to the engine oil and sliding engagement with the cage. A component of a hydraulic system is also disclosed.Type: GrantFiled: April 26, 2001Date of Patent: October 21, 2003Assignee: Caterpillar IncInventors: David A. Cusac, Chuong Q. Dam, Mark G. Fulford, Paul A. Gamble, Robert E. Hawbaker, Rebecca M. Zick
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Patent number: 6606970Abstract: An internal combustion engine and method is disclosed wherein a separate compression cylinder and an adiabatic power cylinder are used and a regenerator or pair of regenerators is mounted between them to provide heat for hot-air ignition. The single regenerator embodiment operates as a two-stroke cycle engine and the embodiment with an alternating pair of regenerators operates as a four-stroke cycle engine. Improvements include a power transfer valve with an anti-backflow design using a recessed valve seat, a rapid leakdown lifter, and ceramic coatings to minimize blow-by, seal the power cylinder during the combustion process, and protect the valve. Additionally, the power cylinder piston, power cylinder head and power transfer valve are all either made from ceramics or have ceramic coatings to insulate the gases and prevent loss of heat from the gases to the cooling system. The lower pressures allows the soft spray of fuel without forming soot.Type: GrantFiled: October 16, 2001Date of Patent: August 19, 2003Inventor: Richard Patton
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Publication number: 20030147769Abstract: To provide a corrosion-resisting and wear resisting alloy including cobalt, nickel or iron as a base used for a sliding part or a valve seat for a machine, and restraining erosion and corrosion caused by eutectic carbide constituting the alloy in an atmosphere with dissolved oxygen.Type: ApplicationFiled: October 15, 2002Publication date: August 7, 2003Applicant: Hitachi, Ltd.Inventors: Yoshihisa Kiyotoki, Yoshiteru Chiba, Shin Kumagai, Yasuhiro Ogawa, Akira Sakamoto, Hiroyuki Shinohara
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Patent number: 6601558Abstract: A cylinder head assembly for use in a flat head style internal combustion engine. A valve for use in the head has a cup portion above the face of the valve. The cup portion of the valve moves longitudinally in a sleeve or liner in the head of the engine.Type: GrantFiled: December 10, 2001Date of Patent: August 5, 2003Inventor: Michael L. Clements
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Patent number: 6598577Abstract: An intake valve includes a floating seat for attaining variable valve timing. A valve stem is integral with a valve head base. The valve head base includes a region for accommodating a peripheral ring in vertically-actuable relationship. The region of the valve head base for accommodating the peripheral ring includes a vertical locking portion and an upwardly-convex portion that mates with an downwardly-concave portion of the interior of the peripheral ring. A port may be arranged to vent gases at an upwardly-sloping portion of the bottom of the interior of the peripheral ring, thereby preventing instantaneous gas seepage while the peripheral ring is elevated. The vertical locking arrangement is positioned at the inner circumference of the peripheral ring to permit adjustment of peripheral ring travel without adding to the mass of the valve head.Type: GrantFiled: December 4, 2002Date of Patent: July 29, 2003Inventor: Vincent R. Marino
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Publication number: 20030121488Abstract: A gas shuttle valve of an internal combustion engine, in which a valve plate, as a sealing element, a tubular valve shaft, as a guide element, and a thrust part, which seals the end of the valve shaft opposite to the valve cone, as a stop for a valve operating element having a support for a typical valve spring, are welded to one another, is to be produced economically, i.e., cost-effectively, while nonetheless having high finished quality.Type: ApplicationFiled: December 19, 2002Publication date: July 3, 2003Applicant: MAHLE Ventiltrieb GmbHInventors: Marcus Abele, Martin Lechner
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Patent number: 6564773Abstract: A multi-valve engine comprises a plurality of intake and exhaust valves on a cylinder. Depending on use, one of the valves is made of higher heat-resistant material, and another is made of lower heat-resistant material, thereby decreasing cost and improving durability and reliability.Type: GrantFiled: June 6, 2002Date of Patent: May 20, 2003Assignee: Fuji Oozx Inc.Inventors: Akiyoshi Mori, Haruki Kobayashi
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Publication number: 20030051704Abstract: A multi-valve engine comprises a plurality of intake and exhaust valves on a cylinder. Depending on use, one of the valves is made of higher heat-resistant material, and another is made of lower heat-resistant material, thereby decreasing cost and improving durability and reliability.Type: ApplicationFiled: June 6, 2002Publication date: March 20, 2003Inventors: Akiyoshi Mori, Haruki Kobayashi
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Patent number: 6519847Abstract: A method of manufacturing surface treated, prefinished valve seat inserts. The method entails forming the valve seat insert, precision machining the valve seat insert to precise tolerances so that the valve seat insert can be installed in one of the cylinder head and engine block without the need for additional seat machining and treating the valve seat insert with a wear resistant treatment prior to inserting the valve seat insert into on of the cylinder head and engine block.Type: GrantFiled: January 16, 2002Date of Patent: February 18, 2003Assignee: L. E. Jones CompanyInventors: Todd A. Trudeau, Daniel W. Bancroft, Cong Yue Qiao, Douglas W. Dooley
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Publication number: 20030029410Abstract: The present invention relates to a connection between two shaft ends (8, 10), situated coaxially one behind the other, of a gas exchange valve (1) of an internal combustion engine and a piston rod (2) of a valve actuator (4), where at least one coupling member (14) at least partially surrounds the shaft ends (8, 10).Type: ApplicationFiled: August 19, 2002Publication date: February 13, 2003Inventors: Hermann Gaessler, Udo Diehl, Karsten Mischker, Rainer Walter, Bernd Rosenau, Jurgen Schiemann, Christian Grosse, Georg Mallebrein, Volker Beuche, Stefan Reimer
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Patent number: 6511045Abstract: A Ti alloy poppet valve consists of a valve stem and a valve head, and is employed as intake or exhaust valve in an internal combustion engine of an automobile. O2 is put into the valve in a furnace at very slight amount and heated to introduce oxygen atoms into titanium of the valve to form a Ti—O interstitial solid solution without making titanium oxides. The valve is strengthened to increase hardness and wear resistance.Type: GrantFiled: February 22, 2001Date of Patent: January 28, 2003Assignee: Fuji Oozx Inc.Inventors: Masahito Hirose, Hiroaki Asanuma
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Publication number: 20020134364Abstract: An internal combustion engine including a combustion chamber, an intake air passage communicated with the combustion chamber, an intake valve having a thermal insulator at an air-exposure portion thereof which is opposed to the intake air passage, a fuel injector disposed within the intake air passage and operative to inject an amount of fuel toward the air-exposure portion of the intake valve at a fuel injection timing, and a controller in communication with the fuel injector. The controller is programmed to set the fuel injection timing of the fuel injector to an engine intake stroke.Type: ApplicationFiled: February 12, 2002Publication date: September 26, 2002Applicant: NISSAN MOTOR CO., LTD.Inventors: Hajime Miura, Makoto Yasunaga
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Patent number: 6453867Abstract: A valve for an internal combustion engine has a valve stem, a valve cone and a valve disk, with the valve cone having a recess to receive the valve disk, and the valve cone and valve disk together forming a cavity. The valve disk has a lesser diameter than the recess in the valve cone, so that an insulation gap is formed between the recess in the valve cone and the valve disk edge. As a result the valve cone and valve stem are thermally insulated relative to the valve disk, which results in an advantageous, lower operating temperature at the valve cone. Particularly in the case of direct-injection internal combustion engines, this reduces the tendency to coking at the valve cone.Type: GrantFiled: September 28, 2001Date of Patent: September 24, 2002Assignee: Ford Global Technologies, Inc.Inventors: Helmut Hans Ruhland, Ulrich Bertram
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Patent number: 6443115Abstract: An exhaust valve for an internal combustion engine comprises a movable spindle with a valve disc which on its upper surface has an annular seat area of a material different from the base material of the valve disc. In the closed position of the valve the seat area abuts a corresponding scat area on a stationary valve member. The seat area on the upper surface of the valve disc is made of a material which has a yield strength (Rp0.2) of at least 1000 MPa at a temperature of approximately 20° C.Type: GrantFiled: April 2, 2001Date of Patent: September 3, 2002Assignee: Man B&W Diesel A/SInventor: Harro Andreas Hoeg
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Publication number: 20020066432Abstract: A valve for an internal combustion engine has a valve stem, a valve cone and a valve disk, with the valve cone having a recess to receive the valve disk, and the valve cone and valve disk together forming a cavity. The valve disk has a lesser diameter than the recess in the valve cone, so that an insulation gap is formed between the recess in the valve cone and the valve disk edge. As a result the valve cone and valve stem are thermally insulated relative to the valve disk, which results in an advantageous, lower operating temperature at the valve cone. Particularly in the case of direct-injection internal combustion engines, this reduces the tendency to coking at the valve cone.Type: ApplicationFiled: September 28, 2001Publication date: June 6, 2002Inventors: Helmut Hans Ruhland, Ulrich Bertram
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Patent number: 6378543Abstract: In order to propose a hollow poppet valve having an excellent, high strength to weight properties by constructing it in order that no influence from welding heat is exerted onto the face, and no stress is concentrated at the welded portion, and a method for manufacturing the same valve, a fillet area 14 opened like a flare is integrally formed at one end of the cylindrical stem portion 12, and a cap is integrally welded to the open edge portion of the fillet area, wherein only the open edge portion of the fillet area 14 is made thicker than the other portions, and the face 15 is formed on the thicker portion 30. Thereby, it is possible to prevent the hardness of the face 15 from being lowered due to the cap welding heat, and stress from being concentrated at the welded portion, whereby the property of high strength to weight can be improved.Type: GrantFiled: July 17, 2000Date of Patent: April 30, 2002Assignee: Nittan Valve Co., Ltd.Inventor: Takemi Murayama
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Publication number: 20020046726Abstract: A cylinder head assembly for use in a flat head style internal combustion engine. A valve for use in the head has a cup portion above the face of the valve. The cup portion of the valve moves longitudinally in a sleeve or liner in the head of the engine.Type: ApplicationFiled: December 10, 2001Publication date: April 25, 2002Inventor: Michael L. Clements
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Patent number: 6363902Abstract: A fracture-resistant, thermally stable intake or exhaust valve for an internal combustion (IC) engine. The valve has a stem portion and a head portion, both of which are formed of fiber reinforced ceramic matrix composite (FRCMC) material. This FRCMC material generally includes a polymer-derived ceramic resin in its ceramic state, fibers, and filler materials. Employing FRCMC material to form the valve is advantageous as FRCMC material is highly temperature resistant and temperature stable, thereby allowing for increased engine operating temperatures. FRCMC material is also ductile, thus making the valve fracture resistant. The FRCMC material is also flaw-insensitive in that any flaw within the structure of the valve will not result in cracking and failure. In addition, FRCMC valves are considerably lighter than the existing metal valves. This provides an opportunity to reduce the weight of the overall valve train, thereby increasing engine performance.Type: GrantFiled: September 29, 2000Date of Patent: April 2, 2002Assignee: Northrop Grumman CorporationInventors: Thomas Edward Strasser, Steven Donald Atmur
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Publication number: 20020036280Abstract: In order to propose a hollow poppet valve having an excellent, high strength to weight properties by constructing it in order that no influence from welding heat is exerted onto the face, and no stress is concentrated at the welded portion, and a method for manufacturing the same valve, a fillet area 14 opened like a flare is integrally formed at one end of the cylindrical stem portion 12, and a cap is integrally welded to the open edge portion of the fillet area, wherein only the open edge portion of the fillet area 14 is made thicker than the other portions, and the face 15 is formed on the thicker portion 30. Thereby, it is possible to prevent the hardness of the face 15 from being lowered due to the cap welding heat, and stress from being concentrated at the welded portion, whereby the property of high strength to weight can be improved.Type: ApplicationFiled: December 6, 2001Publication date: March 28, 2002Inventor: Takemi Murayama
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Patent number: 6354258Abstract: The invention relates to a hollow-stem valve for an internal combustion engine. The valve has a ratio of wall thickness to stem diameter of less than 1:3. The aim of the invention is to minimize the deformation of the valve head. To this end, the valve disk rests directly against the stem.Type: GrantFiled: August 1, 2000Date of Patent: March 12, 2002Assignee: Mahle Ventiltrieb GmbHInventors: Marcus Abele, Thomas Glas, Andreas Von Känel, Walter Krepulat, Martin Lechner, Christoph Steinmetz, Frank Sticher
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Publication number: 20020020384Abstract: An exhaust valve for an internal combustion engine comprises a movable spindle with a valve disc which on its upper surface has an annular seat are of a material different from the base material of the valve disc. In the closed position of the valve the seat area abuts a corresponding seat area on a stationary valve member. The seat area on the upper surface of the valve disc is made of a material which has a yield strength (Rp0.2) of at least 1000 Mpa at a temperature of approximately 20° C.Type: ApplicationFiled: April 2, 2001Publication date: February 21, 2002Inventor: Harro Andreas Hoeg
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Patent number: 6345598Abstract: A three-dimensional engineered fiber preform having a unitary, integral and seamless structure and rigid composite structure made therefrom for use as a mechanical component, particularly for use as a valve, and method for making the preform. The integral design and structure of the preform is formed by a combination of interlacing and non-interlacing fiber systems that permits variable cross-sectional area and dimensions from a first end to a second end along an axis, or from a stem end to a head end of a valve.Type: GrantFiled: September 22, 2000Date of Patent: February 12, 2002Assignee: 3Tex, Inc.Inventors: Alex Bogdanovich, Dmitri Mungalov
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Publication number: 20020011228Abstract: In a composite lightweight valve for internal combustion engines having a solid valve head provided with a center opening and a valve stem received in the center opening of the valve head in a positively locking manner, the valve components are permanently joined to one another by hot upsetting so as to be capable of withstanding the thermal and mechanical effective during engine operation.Type: ApplicationFiled: August 4, 2001Publication date: January 31, 2002Inventors: Pavel Hora, Martin Schlegl, Karl-Heinz Thiemann
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Patent number: 6318327Abstract: An internal combustion engine includes, in combination, an intake side valve system and an exhaust side valve system. Each of the valve systems comprises a valve seat and a valve member to be assembled with the valve seat, in which the valve seat has a base member including a matrix of iron-base sintered alloy and a dispersed Si—Cr—Mo—Co group intermetallic compound powder, the intermetailic compound powder having a hardness of Hv600 to Hv1000 and an average particle diameter of 20 to 70 &mgr;m, the matrix being contained at 10 to 50 mass % with reference to total mass of the base member, and the valve member has a base member including a matrix of martensitic steel and a nitriding diffusion layer formed to a valve face of the base member, the nitriding diffusion layer having a hardness of more than Hv500 and a thickness of more than 20 &mgr;m.Type: GrantFiled: May 31, 2000Date of Patent: November 20, 2001Assignee: Nippon Piston Ring Co., Ltd.Inventors: Teruo Takahashi, Hiroshi Oshige
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Patent number: 6308675Abstract: The invention relates to a gas exchange valve with a hollow space, for an internal combustion engine. The valve comprises a valve stem (3), a valve base and a valve disk (2). The valve stem and valve disk or valve stem and valve base have an approximately cylindrical, elongated hollow space which is formed by both parts. The space is sealed by welding. The aim of the invention is to improve the quality of the welding. To this end, an extra mass of the material required for sealing the hollow space is provided on the valve disk or the valve base so that no additional welding material is necessary.Type: GrantFiled: July 24, 2000Date of Patent: October 30, 2001Assignee: Mahle Ventilrieb GmbHInventors: Peter Keller, Lothar Mück
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Patent number: 6298817Abstract: An exhaust valve for an internal combustion engine including a movable spindle with a valve disc which on its upper surface has an annular seat are of a material different from the base material of the valve disc. In the closed position of the valve the seat area abuts a corresponding seat area on a stationary valve member. The seat area on the upper surface of the valve disc is made of a material which has a yield strength of at least 1000 Mpa at a temperature of approximately 20° C.Type: GrantFiled: December 3, 1998Date of Patent: October 9, 2001Assignee: Man B&W Diesel A/SInventor: Harro Andreas Hoeg
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Patent number: 6263849Abstract: A hollow poppet valve (31) is disclosed, in which a stem portion (13) includes a flared fillet portion (17), having a wall thickness (T), and a downwardly-extending cylindrical portion (33;51), having a cylindrical external surface (35). In the main embodiment, the valve includes a cap member (15) defining a seat face (25), and a cylindrical internal surface (39), the internal and external surfaces (39,35) being closely spaced apart, defining an interface having an axial length (L), and being consumed by a weld (43). Preferably, the length (L) of the weld (43) is equal to at least 1.1 times the thickness (T). The fillet portion (17) defines an internal fillet radius (R1), greater than 0.3 times the thickness (T), and near the radius (R1) is a transition region (TR). The present invention improves fatigue strength of the poppet valve by separating the transition region (TR) from the weld (43) so that there is overlap for no more than a minor portion of the weld.Type: GrantFiled: July 20, 1999Date of Patent: July 24, 2001Assignee: Eaton CorporationInventors: David L. Bonesteel, Leslie L. Ecklund, Michael J. Froehlich, Michael L. Killian, Philip M. Kline
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Patent number: 6257217Abstract: A combustion chamber component for an internal combustion engine has a water and oil repellent coating which has good adhesive power and in which the effect of suppressing the accumulation of deposits is well maintained. The coating is formed from an organosilicon compound represented by the formula Rf—R1—Si(NH)3/2 wherein Rf denotes a perfluoroalkyl group having 1 to 10 carbon atoms and R1 denotes a divalent hydrocarbon group having 2 to 10 carbon atoms.Type: GrantFiled: May 27, 1999Date of Patent: July 10, 2001Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Hideharu Yamazaki, Katsuhiko Kohyama, Yoshihiro Kuki, Masaaki Hasegawa, Hiroyoshi Hayakawa
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Patent number: 6257190Abstract: A cam system to generate valve actuation in an engine that includes a circular camlobe rotated about a first axis is described. The first axis is a preselected distance from the centerpoint of the circular camlobe. The cam system also includes a cam-follower that surrounds the camlobe and that has an inner oval surface with a major and minor axis. The inner oval surface is in moving contact with the circular camlobe during rotation of the camlobe.Type: GrantFiled: April 21, 2000Date of Patent: July 10, 2001Inventor: Terry Glyn Linebarger
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Patent number: 6244234Abstract: An exhaust valve for an internal combustion engine including a movable spindle with a valve disc of a nickel-based alloy which also constitutes an annular seat area at the upper surface of the valve disc. The seat area abuts a corresponding seat area on a stationary valve member in the closed position of the valve. At manufacturing, the seat area of the valve disc is subjected to a thermo-mechanical deformation process at a temperature lower than or around the recrystallization temperature of the alloy. The seat area on the upper surface of the valve disc has been given dent mark preventing properties in the form of a yield strength of at least 1000 MPa at a temperature of approximately 20° C. by means of the thermo-mechanical deformation process and possibly a yield strength increasing heat treatment.Type: GrantFiled: December 3, 1998Date of Patent: June 12, 2001Assignee: Man B&W Diesel A/SInventor: Harro Andreas Hoeg
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Patent number: 6226866Abstract: The present invention provides a carbon-carbon (C/C) composite valve structure useful for high temperature internal combustion engines comprising (a) a carbon-carbon (C/C) composite valve stem having a flared end and a non-flared end opposite the flared end; and (b) a carbon-carbon (C/C) composite valve head applied onto the flared end of the valve stem, wherein at least one of the carbon-carbon (C/C) composite valve stem and head is coated with a high temperature resistant coating.Type: GrantFiled: April 13, 2000Date of Patent: May 8, 2001Assignee: Hitco Carbon Composites, Inc.Inventors: Doug Wilson, Sam Lee, Raj Mathur
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Patent number: 6200688Abstract: A wear resistant alloy is provided having a composition by weight of 1.0-2.5 C, 1.5-4.5 Si, 8.0-20.0 Cr, 9.0-20.0 W and/or Mo, 0.5-2.0 Nb, 20.0-40.0 Fe, and the balance being Ni (>25.0). This alloy provides excellent wear resistance and good hot hardness with relatively low cost compared to prior art nickel base alloys. The alloy has particular use as a valve seat insert materials in diesel fuel internal combustion engines.Type: GrantFiled: April 20, 1998Date of Patent: March 13, 2001Assignee: Winsert, Inc.Inventors: Xuecheng Liang, Gary R. Strong
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Patent number: 6186478Abstract: An Al alloy poppet valve is used in an internal combustion engine and has a valve head and a valve stem. At least the valve head is made of non-heat-treatable Al alloy in which ceramic particles such as oxide and carbide are uniformly dispersed, thereby increasing wear resistance and durability.Type: GrantFiled: February 25, 1999Date of Patent: February 13, 2001Assignee: Fuji Oozx, Inc.Inventors: Akihiro Hamada, Hiroaki Asanuma
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Patent number: 6167859Abstract: A fracture-resistant, thermally stable intake or exhaust valve for an internal combustion (IC) engine. The valve has a stem portion and a head portion, both of which are formed of fiber reinforced ceramic matrix composite (FRCMC) material. This FRCMC material generally includes a polymer-derived ceramic resin in its ceramic state, fibers, and filler materials. Employing FRCMC material to form the valve is advantageous as FRCMC material is highly temperature resistant and temperature stable, thereby allowing for increased engine operating temperatures. FRCMC material is also ductile, thus making the valve fracture resistant. The FRCMC material is also flaw-insensitive in that any flaw within the structure of the valve will not result in cracking and failure. In addition, FRCMC valves are considerably lighter than the existing metal valves. This provides an opportunity to reduce the weight of the overall valve train, thereby increasing engine performance.Type: GrantFiled: December 19, 1997Date of Patent: January 2, 2001Assignee: Northrop Grumman CorporationInventors: Thomas Edward Strasser, Steven Donald Atmur