Patents by Inventor Shunichi Aoyama

Shunichi Aoyama 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: 20190177837
    Abstract: The present invention relates to a chemical deposition raw material including a heterogeneous polynuclear complex in which a cyclopentadienyl and a carbonyl are coordinated to a first transition metal and a second transition metal as central metals, the chemical deposition raw material being represented by the following formula. In the following formula, the first transition metal (M1) and the second transition metal (M2) are mutually different. The number of cyclopentadienyls (L) is 1 or more and 2 or less, and to the cyclopentadienyl is coordinated one of a hydrogen atom and an alkyl group with a carbon number of 1 or more and 5 or less as each of substituents R1 to R5. With the chemical deposition raw material of the present invention, a composite metal thin film or a composite metal compound thin film containing plural metals can be formed from a single raw material.
    Type: Application
    Filed: February 15, 2019
    Publication date: June 13, 2019
    Inventors: Ryosuke HARADA, Toshiyuki SHIGETOMI, Shunichi NABEYA, Kazuharu SUZUKI, Akiko KUMAKURA, Tatsutaka AOYAMA, Takayuki SONE
  • Patent number: 8181613
    Abstract: A variable valve system for an internal combustion engine includes a drive shaft, a drive cam provided on the drive shaft, a link arm fitted on the outer periphery of the drive cam such as to rotate relative to the drive cam, a crank-shaped control shaft including a main shaft and an eccentric cam, an oscillating arm rotatably attached to the eccentric cam and oscillated by the link arm, and an oscillating cam connected to the oscillating arm via a link rod so as to actuate a valve. Lubricant is communicated from a main lubricant flow path in the drive shaft through three lubricant paths to sliding contact areas between the drive cam and the link arm, between the pin of the oscillating arm and the link arm, and between the eccentric cam and the oscillating arm.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: May 22, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tsuyoshi Arinaga, Toru Fukami, Shinichi Takemura, Shunichi Aoyama
  • Patent number: 8151750
    Abstract: A valve operating device that opens and closes a valve of an internal combustion engine by driving a valve stem in an axial direction includes a rocker cam that rocks in accordance with a rotation of a drive shaft and has a driving cam portion and a lift restricting cam portion; a cam follower that lifts the valve by contacting the driving cam portion slidingly; and a restricting member that prevents the cam follower from separating from the driving cam portion in cooperation with the lift restricting cam portion. A gap is formed between the restricting member and the rocker cam in a state where the cam follower is in contact with the driving cam portion and disappears such that the restricting member and the rocker cam come into contact with each other only when the cam follower separates from the driving cam portion.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: April 10, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toru Fukami, Shinichi Takemura, Tsuyoshi Arinaga, Takanobu Sugiyama, Shunichi Aoyama
  • Patent number: 8100098
    Abstract: A multi-link engine has a piston coupled to a crankshaft to move inside an engine cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link thereon. A control link pin connects the lower link to one end of a control link, which is connected at another end to the engine block body by a control shaft. The upper link has an upper link axis that forms an angle with the cylinder axis, as viewed along a crank axis direction of the crankshaft, such that the angle reaches a minimum when a crank angle of the engine is within a range where the bottom end of a piston skirt is positioned below a topmost part of the bottom end of the cylinder liner.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: January 24, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Naoki Takahashi, Masayuki Tomita, Kenshi Ushijima, Koji Hiraya, Hirofumi Tsuchida, Shunichi Aoyama
  • Patent number: 8100097
    Abstract: A multi-link engine has a piston coupled to a crankshaft to move inside an engine cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link thereon. A control link pin connects the lower link to one end of a control link, which is connected at another end to the engine block body by a control shaft. The crank pin has a center arranged on a straight line joining centers of the upper link pin and the control link pin such that an angle formed between the straight line and a horizontal axis that is perpendicular to a center axis of the cylinder and that passes through an axial center of a crank journal is the same for at top dead center and at bottom dead center.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: January 24, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Naoki Takahashi, Masayuki Tomita, Kenshi Ushijima, Koji Hiraya, Hirofumi Tsuchida, Shunichi Aoyama
  • Patent number: 7980207
    Abstract: A multi-link engine has a piston that moves inside a cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link. A crank pin of a crankshaft supports the lower link thereon. The lower link is pivotally connected to one end of a control link, which is connected at another end to the engine block body by a control shaft. The control shaft is lower than a crank journal of the crankshaft, and disposed on a first side of a plane that is parallel to a cylinder center axis and that contains a center rotational axis of the crank journal. The cylinder center axis is located on a second (i.e., opposite the first side) plane. The control link has a center axis that is parallel to the cylinder center axis when the piston is near top and bottom dead centers.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: July 19, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Naoki Takahashi, Masayuki Tomita, Kenshi Ushijima, Koji Hiraya, Hirofumi Tsuchida, Shunichi Aoyama
  • Publication number: 20100083923
    Abstract: A valve operating device (100) opens and closes a valve (2) of an internal combustion engine by driving a valve stem axially. A rocker cam (10) that rocks about a drive shaft (21) in synchronization with a rotation of the internal combustion engine includes a driving cam portion (11) and a lift restricting cam portion (12). A cam follower (41) lifts the valve by contacting the driving cam portion (11) slidingly so as to convert the rocking of the rocker cam (10) into an axial direction motion of the valve stem. A restricting member (42) formed integrally with the cam follower (41) in a rocker arm (40) prevents the cam follower (41) from separating from the driving cam portion (11) in cooperation with the lift restricting cam portion (12), and as a result, an irregular valve motion is prevented regardless of a rocking acceleration of the rocker cam (10).
    Type: Application
    Filed: September 18, 2007
    Publication date: April 8, 2010
    Inventors: Toru Fukami, Shinichi Takemura, Tsuyoshi Arinaga, Takanobu Sugiyama, Shunichi Aoyama
  • Patent number: 7669559
    Abstract: In a reciprocating piston engine employing a variable compression ratio mechanism linked to a reciprocating piston for variably adjusting a geometrical compression ratio by varying at least a piston top dead center position, so that the top dead center position obtained at a low geometrical compression ratio is set to be lower than that at a high geometrical compression ratio, responsively to a controlled variable, a controller is configured to set a target compression ratio to a high value at low engine load operation, and to a relatively low value at high engine load operation. A substantially entire area of a crown of the piston, defining a part of a wall surface of a combustion chamber, is formed of a non-metallic material having a higher heat-insulating and heat-reserving property as compared to a base structural material of each of the combustion chamber and the piston.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: March 2, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shunichi Aoyama, Katsuya Moteki, Kenshi Ushijima, Shinichi Takemura, Hideaki Mizuno
  • Patent number: 7640901
    Abstract: An engine intake control apparatus for an engine that comprises at least one combustion chamber operatively connected to an intake port and an intake valve associated with each intake port, wherein the intake valve is adapted to open and close the intake port is disclosed herein. The intake control apparatus comprises a variable valve operating mechanism and a controller. The variable valve operating mechanism is configured and arranged to selectively change a valve closing timing and a valve lift amount of the intake valve. The controller is configured and arranged to control the variable valve operating mechanism when the engine is in a low load condition. The valve closing timing is determined such that an actual compression ratio of the engine is reduced relative to the actual compression ratio when the engine is operating in a high load condition. The valve lift amount is smaller when the engine is in the low load condition relative to the valve lift amount when the engine is in the high load condition.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: January 5, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shunichi Aoyama, Shinichi Takemura, Ryosuke Hiyoshi
  • Publication number: 20090301418
    Abstract: A variable valve system for an internal combustion engine includes a drive shaft, a drive cam provided on the drive shaft, a link arm fitted on the outer periphery of the drive cam such as to rotate relative to the drive cam, a crank-shaped control shaft including a main shaft and an eccentric cam, an oscillating arm rotatably attached to the eccentric cam and oscillated by the link arm, and an oscillating cam connected to the oscillating arm via a link rod so as to actuate a valve. Lubricant is communicated from a main lubricant flow path in the drive shaft through three lubricant paths to sliding contact areas between the drive cam and the link arm, between the pin of the oscillating arm and the link arm, and between the eccentric cam and the oscillating arm.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 10, 2009
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tsuyoshi ARINAGA, Toru FUKAMI, Shinichi TAKEMURA, Shunichi AOYAMA
  • Patent number: 7594467
    Abstract: An internal combustion engine includes a piston adapted to reciprocate in a cylinder. The piston includes a first portion, a second portion, and a third portion. The first portion of the piston forms a crown surface of the piston, the second portion of the piston forms a piston ring groove of the piston with the piston ring groove arranged and configured to receive a piston ring, and the third portion of the piston forms a crankcase side surface of the piston with the crankcase side surface facing a crankcase of the engine. The second portion of the piston is formed of a material having a higher thermal conductivity than a material forming the first portion of the piston and a material forming a third portion of the piston.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: September 29, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shunichi Aoyama, Kenshi Ushijima, Katsuya Moteki
  • Publication number: 20090107468
    Abstract: A multi-link engine has a piston that moves inside a cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link. A crank pin of a crankshaft supports the lower link thereon. The lower link is pivotally connected to one end of a control link, which is connected at another end to the engine block body by a control shaft. The control shaft is lower than a crank journal of the crankshaft, and disposed on a first side of a plane that is parallel to a cylinder center axis and that contains a center rotational axis of the crank journal. The cylinder center axis is located on a second (i.e., opposite the first side) plane. The control link has a center axis that is parallel to the cylinder center axis when the piston is near top and bottom dead centers.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 30, 2009
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Naoki TAKAHASHI, Masayuki TOMITA, Kenshi USHIJIMA, Koji HIRAYA, Hirofumi TSUCHIDA, Shunichi AOYAMA
  • Publication number: 20090107452
    Abstract: A multi-link engine has a piston coupled to a crankshaft to move inside an engine cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link thereon. A control link pin connects the lower link to one end of a control link, which is connected at another end to the engine block body by a control shaft. The crank pin has a center arranged on a straight line joining centers of the upper link pin and the control link pin such that an angle formed between the straight line and a horizontal axis that is perpendicular to a center axis of the cylinder and that passes through an axial center of a crank journal is the same for at top dead center and at bottom dead center.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 30, 2009
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Naoki TAKAHASHI, Masayuki TOMITA, Kenshi USHIJIMA, Koji HIRAYA, Hirofumi TSUCHIDA, Shunichi AOYAMA
  • Publication number: 20090107453
    Abstract: A multi-link engine has a piston coupled to a crankshaft to move inside an engine cylinder. A piston pin connects the piston to an upper link, which is connected to a lower link by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link thereon. A control link pin connects the lower link to one end of a control link, which is connected at another end to the engine block body by a control shaft. The upper link has an upper link axis that forms an angle with the cylinder axis, as viewed along a crank axis direction of the crankshaft, such that the angle reaches a minimum when a crank angle of the engine is within a range where the bottom end of a piston skirt is positioned below a topmost part of the bottom end of the cylinder liner.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 30, 2009
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Naoki Takahashi, Masayuki Tomita, Kenshi Ushijima, Koji Hiraya, Hirofumi Tsuchida, Shunichi Aoyama
  • Patent number: 7426913
    Abstract: There is provided a system for controlling an intake valve of an internal combustion engine, including a variable valve mechanism having a control shaft to continuously vary a valve lift amount of the intake valve according to a rotational angle of the control shaft and an actuator to drive the control shaft, and a control unit that controls the actuator so as to set the control shaft to a first rotational angle position at which the valve lift amount takes a first value during an engine idling period and to a second rotational angle position at which the valve lift amount takes on a second value larger than the first value to provide a required intake quantity to start the engine during a time from the beginning of an engine speed decrease period, through an engine stop period, until the completion of a cranking period of the engine.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: September 23, 2008
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tsuyoshi Arinaga, Takanobu Sugiyama, Shin Ishizaki, Ryosuke Hiyoshi, Shinichi Takemura, Shunichi Aoyama
  • Patent number: 7363902
    Abstract: An internal combustion engine includes a piston (2) and a crankshaft (33). The crankshaft (33) includes: a journal (33A) as a rotation center; a crank pin (33B) that is located eccentrically with respect to the journal (33A) and rotates integrally with the journal (33A), the crank pin (33b) connecting the piston (2) to the crankshaft (33); and a counter weight (33C) that is located eccentrically with respect to the journal (33A) in a direction opposite to the crank pin (33) and rotates uniformly with the journal (33A). A cutout (11) through which the counter weight (33C) passes is formed in a wall (1) of a cylinder bore that accommodates the piston (2) so as to be free to move reciprocally along the wall (1). As a result, the bottom dead center position of the piston can be lowered, and the overall height of the engine can be decreased.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: April 29, 2008
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenshi Ushijima, Shunichi Aoyama, Katsuya Moteki, Naoki Takahashi
  • Publication number: 20080087255
    Abstract: In a reciprocating piston engine employing a variable compression ratio mechanism configured to be linked to a reciprocating piston for variably adjusting a geometrical compression ratio by varying at least a top dead center position of the piston responsively to a controlled variable, a controller is configured to control the variable compression ratio mechanism depending on an engine operating condition. A part of a wall surface of a combustion chamber is formed of a non-metallic material having a higher heat-insulating and heat-reserving property as compared to a base structural material of each of the combustion chamber and the piston.
    Type: Application
    Filed: October 10, 2007
    Publication date: April 17, 2008
    Inventors: Shunichi Aoyama, Katsuya Moteki, Kenshi Ushijima, Shinichi Takemura, Hideaki Mizuno
  • Patent number: 7290508
    Abstract: A lower link for a piston crank mechanism of an internal combustion engine includes an upper section, a lower section, and a crank pin bearing section disposed between the upper section and the lower section, and mounted on a crank pin of a crank shaft. One of the upper section and the lower section is formed with a bolt inserting hole. The other of the upper section and the lower section is formed with an internal thread portion including an open end. One of the bolts passes through the bolt inserting hole, is screwed into the internal thread portion, and includes an end bared from the open end which is formed in a surface perpendicular to a bolt center axis. The other of the upper section and the lower section includes a recessed portion formed in the surface to divert a stress transmitting path.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 6, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hideaki Mizuno, Shunichi Aoyama, Kenshi Ushijima, Katsuya Moteki
  • Publication number: 20070204747
    Abstract: An internal combustion engine includes a piston adapted to reciprocate in a cylinder. The piston includes a first portion, a second portion, and a third portion. The first portion of the piston forms a crown surface of the piston, the second portion of the piston forms a piston ring groove of the piston with the piston ring groove arranged and configured to receive a piston ring, and the third portion of the piston forms a crankcase side surface of the piston with the crankcase side surface facing a crankcase of the engine. The second portion of the piston is formed of a material having a higher thermal conductivity than a material forming the first portion of the piston and a material forming a third portion of the piston.
    Type: Application
    Filed: February 28, 2007
    Publication date: September 6, 2007
    Inventors: Shunichi Aoyama, Kenshi Ushijima, Katsuya Moteki
  • Patent number: RE43034
    Abstract: An engine intake control apparatus for an engine that comprises at least one combustion chamber operatively connected to an intake port and an intake valve associated with each intake port, wherein the intake valve is adapted to open and close the intake port is disclosed herein. The intake control apparatus comprises a variable valve operating mechanism and a controller. The variable valve operating mechanism is configured and arranged to selectively change a valve closing timing and a valve lift amount of the intake valve. The controller is configured and arranged to control the variable valve operating mechanism when the engine is in a low load condition. The valve closing timing is determined such that an actual compression ratio of the engine is reduced relative to the actual compression ratio when the engine is operating in a high load condition. The valve lift amount is smaller when the engine is in the low load condition relative to the valve lift amount when the engine is in the high load condition.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: December 20, 2011
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Shunichi Aoyama, Shinichi Takemura, Ryosuke Hiyoshi