Patents by Inventor Manabu Tateno

Manabu Tateno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120234274
    Abstract: A spark ignition type internal combustion engine includes a plurality of cylinders and can stop combustion in part of these cylinders. Further, the spark ignition type internal combustion engine comprises a variable compression ratio mechanism (A) which can change an mechanical compression ratio, and a variable valve timing mechanism (B) which can control a closing timing of an intake valve. When idling part of the cylinders or increasing idled cylinders, the closing timing of an intake valve (7) moves in a direction which approaches an intake bottom dead center side, and the mechanical compression ratio of the operating cylinders falls. By idling part of the plurality of cylinders in this way, it is possible to realize a high heat efficiency even in a region where the engine load is low.
    Type: Application
    Filed: December 4, 2009
    Publication date: September 20, 2012
    Inventors: Naoto Hisaminato, Eiichi Kamiyama, Manabu Tateno
  • Publication number: 20120210957
    Abstract: The present variable compression ratio V-type internal combustion engine is a variable compression ratio V-type internal combustion engine which joins cylinder blocks of two cylinder groups and makes the joined cylinder block 10 move relatively to a crankcase along an arc-shaped path so as to move away from an engine crankshaft, wherein the arc-shaped path is set so that the mechanical compression ratio of one cylinder group and the mechanical compression ratio of the other cylinder group become equal when the cylinder block is at the lowest position closest to the engine crankshaft and when the cylinder block is at a specific position between the lowest position and a highest position which is furthest from the engine crankshaft.
    Type: Application
    Filed: November 13, 2009
    Publication date: August 23, 2012
    Inventors: Naoto Hisaminato, Manabu Tateno, Eiichi Kamiyama
  • Publication number: 20120210979
    Abstract: An intake apparatus of an engine includes: a first intake passage supplying fresh air to a cylinder; a second intake passage arranged near the first intake passage, and supplying fresh air to the cylinder; a first intake valve opening and closing the first intake passage at an aperture of the first intake passage; a second intake valve opening and closing the second intake passage at an aperture of the second intake passage. An opening timing of the first intake valve of the intake apparatus advances relative to a top dead center, and a valve lift amount of the first intake valve differs from that of the second intake valve, and there is a period while the valve lift amount of the first intake valve is larger than that of the second intake valve, in an intake stroke.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 23, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Okumura, Manabu Tateno, Naoto Hisaminato
  • Publication number: 20120160055
    Abstract: In a dual camshaft structure, an inner shaft provided with a variable cam is inserted into an outer shaft provided with a secured cam. In the dual camshaft structure, the secured cam is provided on a first cylindrical member, the first cylindrical member is secured to the outside of the outer shaft, the variable cam is provided on the second cylindrical member, and the second cylindrical member is installed at the outside of the first cylindrical member and is secured to the inner shaft by a connection member via a notch provided on the first cylindrical member and a notch provided on the outer shaft. Therefore, the rigidity of the dual camshaft structure can be ensured, and a slidable surface of a cam rotatable at the outside of the outer shaft can be held.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 28, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Manabu Tateno
  • Publication number: 20120145128
    Abstract: A variable compression ratio V-type internal combustion engine joins the cylinder blocks of two cylinder groups together and makes the joined cylinder blocks move relative to a crankcase. The variable compression ratio V-type internal combustion engine includes a first relative movement mechanism and a second relative movement mechanism. The first relative movement mechanism and the second relative movement mechanism can be independently controlled, and a first relative movement distance at one cylinder group side of the cylinder block in the direction of the centerline of the engine which passes through the center of the crank shaft as seen in the front plan view caused by the first relative movement mechanism and a second relative movement distance at the other cylinder group side of the cylinder block in the direction of the centerline of the engine caused by the second relative movement mechanism are able to made different.
    Type: Application
    Filed: September 3, 2010
    Publication date: June 14, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Manabu Tateno
  • Patent number: 8160801
    Abstract: A valve drive system comprises a power transmitting mechanism (13) that converts rotary motion of an electric motor (12) into opening and closing motion of an intake valve (3) provided in a cylinder (2) of an internal combustion engine (1) to transmit power from the electric motor (12) to the valve (3) via a cam (152); and a rotational angle restricting mechanism (16) that is provided in a motion transmission path that extends from the electric motor (12) to the cam (152) and restricts rotation of the cam (152) within a predetermined angular range that is set so that a piston (5) of the engine (1) and the intake valve (3) do not interfere with each other. The rotational angle restricting mechanism (16) comprises a flange (161) that rotates as a unit with a camshaft (151) and forms a slotted groove hole (161a) thereon; and a stopper pin (162) that is inserted into and retracted from the groove hole (161a).
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: April 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shuichi Ezaki, Manabu Tateno, Akio Kidooka
  • Patent number: 8109245
    Abstract: A drive cam opens or closes an intake valve via a variable mechanism, a split-type rocking cam arm, and a valve actuating mechanism. The variable mechanism varies a position of an intermediate roller corresponding to a rotating angle of a control shaft, thereby variably setting a lift amount of the intake valve. The split-type rocking cam arm includes an input arm and an output arm, and a connection selection mechanism is disposed between the arms. When the arms are connected together, the intake valve performs an ordinary open/close operation. When the arms are disconnected, an input of the drive cam is absorbed by a relative rocking motion between the arms, so that the intake valve is retained in a pause state.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: February 7, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Tateno
  • Patent number: 8033098
    Abstract: A throttle operation is performed after an internal combustion engine is started. Then, temperature of a catalyst is obtained based on a signal output from a temperature sensor fitted to the catalyst. It is then determined whether the temperature obtained is equal to or higher than the activation temperature. If it is determined that the temperature of the catalyst has not reached the activation temperature, the throttle operation continues. On the other hand, if it is determined that the temperature of the catalyst is equal to or higher than the activation temperature, the non-throttle operation is performed instead of the throttle operation.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: October 11, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Tateno
  • Patent number: 7909006
    Abstract: Disclosed is a variable valve mechanism for an internal combustion engine. The variable valve mechanism accurately adjusts the valve operating angle although its structure is simple. The variable valve mechanism includes a control pin 48, which is inserted into a pin insertion hole 38 in a control shaft 16; a bearing hole 44, which is formed in a control member 26; and an adjustment pin 50, which is rotatably supported by the bearing hole 44. The adjustment pin 50 comes into surface contact with the control pin 48 to inhibit the control member 26 from rotating relative to the control shaft 16. The valve operating angle is adjusted by replacing the adjustment pin 50 with another having a different dimension B. Such adjustment pin replacement changes the distance A between the center line of the bearing hole 44 and the center line of the control pin 48, thereby changing the relative angle ? between the control shaft 16 and control member 26.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: March 22, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Shuichi Ezaki
  • Patent number: 7814873
    Abstract: The present invention relates to a variable valve operating device and a valve opening amount adjustment method, and can accurately control the amount of in-cylinder air and the strength of a swirl flow. The variable valve operating device according to the present invention includes a valve mechanism that can select a dual valve variable control mode in which the valve opening amounts of a first valve and a second valve, which are of the same type and provided for the same cylinder, can be varied continuously or in multiple steps. A valve opening amount difference is provided when the valve opening amounts are minimized in the dual valve variable control mode so that the valve opening amount of the first valve is larger than that of the second valve. In addition, adjustments are made so that the minimum valve opening amount of the first valve does not vary from one cylinder to another.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: October 19, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Shuichi Ezaki, Toshiyuki Maehara
  • Publication number: 20100126446
    Abstract: A drive cam opens or closes an intake valve via a variable mechanism, a split-type rocking cam arm, and a valve actuating mechanism. The variable mechanism varies a position of an intermediate roller corresponding to a rotating angle of a control shaft, thereby variably setting a lift amount of the intake valve. The split-type rocking cam arm includes an input arm and an output arm, and a connection selection mechanism is disposed between the arms. When the arms are connected together, the intake valve performs an ordinary open/close operation. When the arms are disconnected, an input of the drive cam is absorbed by a relative rocking motion between the arms, so that the intake valve is retained in a pause state.
    Type: Application
    Filed: June 11, 2008
    Publication date: May 27, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Tateno
  • Patent number: 7721691
    Abstract: A worm gear is connected to an actuator and a worm wheel is connected to a control shaft. The worm wheel has teeth formed only on a predetermined angular range thereof. The above-referenced angular range includes a required rotational range of the control shaft. The worm wheel is formed to be brought out of mesh with the worm gear outside the predetermined angular range.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: May 25, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Tateno
  • Patent number: 7644689
    Abstract: A variable valve operating device that makes it possible to reduce the loss in driving force transmission from a camshaft to a valve during a valve lift is provided. The rotary motion of a drive cam is transmitted to a swing member via intermediate rollers. A coupling member couples the intermediate rollers, to a swing fulcrum that is fastened to a control shaft. The swing fulcrum is positioned eccentrically to the center of the control shaft. Further, when the control shaft is positioned at a predetermined rotation position, the swing fulcrum is positioned so that the control shaft is placed between the swing fulcrum and the intermediate rollers. Preferably, the swing fulcrum, the control shaft, and the intermediate rollers are aligned.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 12, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Toshiaki Asada, Shuichi Ezaki
  • Patent number: 7640900
    Abstract: The present invention relates to a variable valve operating device and makes it possible to inhibit friction during driving force transmission and provide high durability through the use of a compact configuration. A first roller 170, which comes into contact with a drive cam surface 124 of a camshaft 120, has a larger diameter than a second roller 172, which comes into contact with a slide surface 156 of a swing member 150. A coupling shaft 174 couples the first roller 170 to the second roller 172 so that the rollers 170, 172 can rotate independently. The slide surface 156 is curved toward the drive cam surface 124.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 5, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Shuichi Ezaki, Toshiaki Asada
  • Publication number: 20090320779
    Abstract: Disclosed is a variable valve mechanism for an internal combustion engine. The variable valve mechanism accurately adjusts the valve operating angle although its structure is simple. The variable valve mechanism includes a control pin 48, which is inserted into a pin insertion hole 38 in a control shaft 16; a bearing hole 44, which is formed in a control member 26; and an adjustment pin 50, which is rotatably supported by the bearing hole 44. The adjustment pin 50 comes into surface contact with the control pin 48 to inhibit the control member 26 from rotating relative to the control shaft 16. The valve operating angle is adjusted by replacing the adjustment pin 50 with another having a different dimension B. Such adjustment pin replacement changes the distance A between the center line of the bearing hole 44 and the center line of the control pin 48, thereby changing the relative angle ? between the control shaft 16 and control member 26.
    Type: Application
    Filed: December 26, 2007
    Publication date: December 31, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Shuichi Ezaki
  • Publication number: 20090277408
    Abstract: The present invention relates to a variable valve operating device and a valve opening amount adjustment method, and can accurately control the amount of in-cylinder air and the strength of a swirl flow. The variable valve operating device according to the present invention includes a valve mechanism that can select a dual valve variable control mode in which the valve opening amounts of a first valve and a second valve, which are of the same type and provided for the same cylinder, can be varied continuously or in multiple steps. A valve opening amount difference is provided when the valve opening amounts are minimized in the dual valve variable control mode so that the valve opening amount of the first valve is larger than that of the second valve. In addition, adjustments are made so that the minimum valve opening amount of the first valve does not vary from one cylinder to another.
    Type: Application
    Filed: September 22, 2006
    Publication date: November 12, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Manabu Tateno, Shuichi Ezaki, Toshiyuki Maehara
  • Publication number: 20090272351
    Abstract: A valve drive system comprises a power transmitting mechanism (13) that converts rotary motion of an electric motor (12) into opening and closing motion of an intake valve (3) provided in a cylinder (2) of an internal combustion engine (1) to transmit power from the electric motor (12) to the valve (3) via a cam (152); and a rotational angle restricting mechanism (16) that is provided in a motion transmission path that extends from the electric motor (12) to the cam (152) and restricts rotation of the cam (152) within a predetermined angular range that is set so that a piston (5) of the engine (1) and the intake valve (3) do not interfere with each other. The rotational angle restricting mechanism (16) comprises a flange (161) that rotates as a unit with a camshaft (151) and forms a slotted groove hole (161a) thereon; and a stopper pin (162) that is inserted into and retracted from the groove hole (161a).
    Type: Application
    Filed: March 20, 2007
    Publication date: November 5, 2009
    Inventors: Shuichi Ezaki, Manabu Tateno, Akio Kidooka
  • Publication number: 20090255494
    Abstract: A worm gear is connected to an actuator and a worm wheel is connected to a. control shaft. The worm wheel has teeth formed only on a predetermined angular range thereof. The above-referenced angular range includes a required rotational range of the control shaft. The worm wheel is formed to be brought out of mesh with the worm gear outside the predetermined angular range.
    Type: Application
    Filed: October 31, 2006
    Publication date: October 15, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Manabu Tateno
  • Patent number: 7591238
    Abstract: The rotary motion of a camshaft is transmitted from a first drive cam to a slide surface of a swing cam arm via intermediate members so that the swing cam arm lifts a valve. In this instance, the operating characteristic of the valve changes when the rotation position of a control shaft changes to change the positions of the intermediate members on the slide surface. When the operating characteristic control mode for the valve is to be changed from variable control to fixed control, coupling means couples the swing cam arm and input arm, thereby causing a second drive cam to swing the swing cam arm. The setting for the lift amount of the valve that is obtained when the second drive cam swings the swing cam arm is not smaller than a maximum lift amount setting for a situation where the first drive cam swings the swing cam arm.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: September 22, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Manabu Tateno, Shuichi Ezaki
  • Publication number: 20090038567
    Abstract: The present invention relates to a variable valve operating device and makes it possible to inhibit friction during driving force transmission and provide high durability through the use of a compact configuration. A first roller 170, which comes into contact with a drive cam surface 124 of a camshaft 120, has a larger diameter than a second roller 172, which comes into contact with a slide surface 156 of a swing member 150. A coupling shaft 174 couples the first roller 170 to the second roller 172 so that the rollers 170, 172 can rotate independently. The slide surface 156 is curved toward the drive cam surface 124.
    Type: Application
    Filed: August 30, 2005
    Publication date: February 12, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Manabu Tateno, Shuichi Ezaki, Toshiaki Asada