Hemispherical Patents (Class 123/666)
  • Patent number: 11674473
    Abstract: An engine includes a cylinder block in which a cylinder is formed, a piston arranged to be reciprocally movable in the cylinder, a cylinder head that is arranged on an upper side of the cylinder block and forms a combustion chamber between an inner peripheral surface of the cylinder and an upper surface of the piston, and an ignition plug arranged in the cylinder head. An inner peripheral portion of the cylinder head includes an inner peripheral side portion formed to be flush with the inner peripheral surface of the cylinder, and a tilting portion tilting from the upper surface of the piston to a side surface is formed on the piston.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: June 13, 2023
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Toshiki Shinohara, Takashi Suzuki, Masanori Ishikawa
  • Patent number: 8733332
    Abstract: The invention discloses a general-purpose gasoline engine, comprising a cylinder block, a cylinder head main body (1), and an intake passage (12) and an exhaust passage (11) arranged on the cylinder head main body (1); an intake valve (5) is arranged on the cylinder head main body (1) correspondingly to the intake passage (12), an exhaust valve (9) is arranged correspondingly to the exhaust passage (11), the intake valve (5) is correspondingly provided with an intake rocker arm (8) and an intake push rod, the exhaust valve (9) is correspondingly provided with an exhaust rocker arm (2) and an exhaust push rod, a combustion chamber surface (13) is formed on the inner side of the cylinder head main body (1), and the combustion chamber surface (13) is of a spherical structure or an arch structure formed of smooth curves; the part of the combustion chamber surface (13) between the intake valve (5) and the exhaust valve (9) forms a nose bridge region (14), and a through air-cooling passage (10) is arranged on the c
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: May 27, 2014
    Assignee: Loncin Motor Co., Ltd.
    Inventor: Bibo Che
  • Patent number: 7128028
    Abstract: A water-cooled cylinder head for a multicylinder internal-combustion engine, has a cylinder head housing which has charge cycle ducts, passage bores for receiving cylinder head screws, valve stem guides for inlet and outlet valves controlling the charge cycle ducts, and part-spherical combustion chamber caps which are bounded by a water cooling jacket on a side facing away from the combustion chamber. One spark plug dome respectively has an opening leading to the combustion chamber of the respective cylinder. For reinforcing the cylinder head housing and/or for supporting the part-spherical combustion chamber caps, a rib structure is integrated in the cylinder head housing.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: October 31, 2006
    Assignee: Dr. Ing. h.c.F. Porsche Aktiengesellschaft
    Inventors: Michael Paul, Frank Ickinger
  • Patent number: 6401702
    Abstract: A combustion chamber in a reciprocating-piston internal combustion engine having at least one inlet duct and at least one outlet duct is formed by a cylinder head and piston each having respective annular squish surfaces for acceleration of fresh gases. A mixture guide element having a recess in its top adjoins the piston crown and the inlet duct to the cylinder is arranged to cause fresh gases to flow with a circulatory movement into the combustion chamber. The configuration increases power output while reducing pollution emissions.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: June 11, 2002
    Inventor: Kurt König
  • Patent number: 6273043
    Abstract: A plate for mounting a rocker arm assembly on an internal combustion engine having hemispherical combustion chambers is disclosed. The plate has a lower surface which mounts to the head of the engine. First and second surface portions are arranged in parallel, spaced apart relation opposite the lower surface. The first and second surface portions provide mounting surfaces for individual rocker arm stands on which the rocker arms are rotatably mounted. The stands are oriented to extend at an angle to the plane of the plate by angularly orienting the first and second surface portions. Mounting the rocker arms in this manner allows them to engage the push rods and valve stems at respective points of contact which remain over the centerlines of the push rods and valve stems and push true along the line of motion of these components. This arrangement eliminates side loads on the push rods and valve stems and results in increased engine performance.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: August 14, 2001
    Inventor: Raymond A. Barton
  • Patent number: 5826567
    Abstract: In a two-stroke internal combustion engine, total hydrocarbon (THC) exhaust is decreased as a result of small structural changes and without loss of output power. A Schnurle scavenging-type combustion chamber has a hemispherical main surface and an annular skirt-like squish band, and a spark plug is disposed for a spark point to be substantially at the center of the combustion chamber. The squish band has minimized width.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: October 27, 1998
    Assignee: Kioritz Corporation
    Inventors: Yukio Sakaguchi, Noboru Nagai, Shigeru Sato, Yasuharu Sato
  • Patent number: 5076219
    Abstract: A rotary bell (36) driven by a hollow shaft (42) and a pinion (46) selectively exposes intake and exhaust ports of the cylinder head (23). The bell (36) delimits a substantially hemispherical combustion chamber (26) and has a progression face (62) which partially protects the piston (1) from the expansion pressure near the top dead center, that is to say when the pressure variation is the most abrupt. The invention is used for improving the combustion, reducing the wear and increasing the operating comfort.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: December 31, 1991
    Inventor: Jacques Pellerin
  • Patent number: 5007394
    Abstract: A combustion chamber, designed for compression ignition internal combustion engines, solves the problem of distribution and whirling of fuel mixture in the combustion chamber of the engine and from this the resulting easier ignition of fuel mixture, optimum increase in the combustion pressures with optimum layout of the valve gear and the intake and exhaust channels in a simplified design of the cylinder head enabled by the larger eccentricity of the injection jet. A rotary combustion chamber is formed in the piston head, the bottom of the chamber formed by a rotary peripheral surface and rotary internal surface with a circular barrier. Ratios between the depth of the rotary peripheral surface and the depth of the top of the barrier, the largest diameter of the rotary internal surface and the largest diameter of the rotary peripheral surface, and the depth of both rotary surfaces are defined in specific ranges.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: April 16, 1991
    Assignee: AVIA koncern
    Inventors: Jaroslav Brychta, Eduard Lutisan, Vladimir Jirkovsky
  • Patent number: 4484550
    Abstract: Internal combustion engine with at least one combustion chamber produced within a cylinder head or similar device, it being possible to feed a fuel-and-air mixture into said combustion chamber through two inlet valves arranged in the cylinder head and to discharge from the said combustion chamber exhaust gases through two exhaust valves arranged in the cylinder head, with the invention also relating to a method of producing such a combustion chamber by means of a casting process. The invention is characterized in that the combustion chamber (1) consists of four cavities (4,5,6,7) distributed in quadrants with a circular plane forming part of base plane (8) of cylinder head (2), in that each individual cavity (4-7) has a shape which is in the main rotationally symmetrical and in that the cavities (4-7) overlap one another, whereby arc-shaped transitions are formed between cavities (4-7) in base plane (8).
    Type: Grant
    Filed: February 25, 1982
    Date of Patent: November 27, 1984
    Assignee: Saab-Scania Aktiebolag
    Inventors: Bengt G. Gadefelt, Lars L. Saaf
  • Patent number: 4333426
    Abstract: An engine constructed with a hemispherically shaped combustion chamber having inlet and exhaust valves flush mounted in the surface of the chamber with centerlines perpendicular to the chamber surface and intersecting the cylinder bore centerline at a common point; the valve train components for each valve all acting in a single plane and having centerlines that together converge towards a common point adjacent the cylinder bore centerline, the valve train planes of each pair of inlet and exhaust valves being canted with respect to each other and to the camshaft axis, a single overhead camshaft being centrally located between the inlet and exhaust valves.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: June 8, 1982
    Assignee: Ford Motor Company
    Inventors: John M. Gavasso, Louis G. Bodnar, Walter E. Parker
  • Patent number: 4324214
    Abstract: An internal combustion engine comprises a combustion chamber located between a spherical-cup bottom wall of the engine head and a crown top wall of the piston. The crown wall includes of five wall portions, of which first and second side portions are convex, third and fourth side portions are flat, and a fifth central portion is concave.
    Type: Grant
    Filed: February 26, 1980
    Date of Patent: April 13, 1982
    Assignee: Alfa Romeo S.p.A.
    Inventor: Giampaolo Garcea