Patents by Inventor Shinichi Murata

Shinichi Murata 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).

  • Patent number: 8171901
    Abstract: In an engine which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary the phase of the second intake cam, the cam phase change mechanism is controlled so that the opening timing of the second intake valve is advanced ahead of that of the first intake valve in a start mode.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: May 8, 2012
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventor: Shinichi Murata
  • Patent number: 8146556
    Abstract: A start control device of an internal combustion engine, the start control device includes: a starting unit, which cranks the internal combustion engine to start the internal combustion engine while opening and closing an intake valve; a variable valve mechanism, which can change a closing timing of the intake valve; and a control unit, which controls the variable valve mechanism so as to advance the closing timing of the intake valve while the starting unit cranks.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: April 3, 2012
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Satoshi Yoshikawa, Shinichi Murata
  • Publication number: 20120042858
    Abstract: A combustion chamber construction includes inlet and exhaust side sloping surfaces. The inlet side sloping surface is formed on one side of a pentroof apex portion as a boundary and which has an inlet port. The exhaust side sloping surface is formed on the other side of the pentroof apex portion as the boundary and which has an exhaust port. A flow improving portion is formed between the inlet port and exhaust port. The flow improving portion includes an inlet flow surface which is formed by recessing part of the inlet side sloping surface and an exhaust side guide surface. One end of the exhaust side guide surface is connected to an exhaust surface of the exhaust side sloping surface and the other end is connected to the inlet flow surface. An angle formed by the inlet flow surface and the exhaust side guide surface is smaller than or equal to an angle formed by the exhaust surface and the exhaust side guide surface.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 23, 2012
    Inventors: Tomoyuki MURAOKA, Shinichi MURATA, Shinji MATSUMURA
  • Patent number: 8069698
    Abstract: A press assembly including a die assembly having a trim die defining an annular cavity wherein the trim die is fixed to the press assembly, a punch assembly including a trim punch having an annular boss that is correspondingly shaped to the annular cavity, wherein the trim punch is movable relative to the die assembly, and an ejector assembly including an ejector arm, wherein the ejector arm is mounted to the punch assembly. The object is pressed into the annular cavity of the trim die by the annular boss of the trim punch when the annular boss is slidably received in the annular cavity, and the ejector arm pushes the object upwardly within the annular cavity of the trim die when the annular boss of the trim punch is removed from the annular cavity.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: December 6, 2011
    Assignee: Musashi Seimitsu Kogyo Kabushiki Kaisha
    Inventor: Shinichi Murata
  • Patent number: 8061316
    Abstract: An internal combustion engine includes: a variable valve train mechanism, configured to receive a cam displacement of an inlet cam so as to vary a driving output for driving an inlet valve continuously from a maximum valve lift to a minimum valve lift so as to match the driving output with a running condition of the internal combustion engine; and a control part, configured to control the variable valve train mechanism so as to set a valve lift of the inlet valve to a starter valve lift when starting the internal combustion engine in a cold state. The starter valve lift is formed so that a valve opening period of the inlet valve is set to encompass an overall area of an induction stroke period of the internal combustion engine from a top dead center to a bottom dead center of the induction stroke period.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: November 22, 2011
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Daisuke Yoshika, Shinichi Murata, Hitoshi Toda, Masayuki Takagaki
  • Publication number: 20110197836
    Abstract: A variable valve mechanism varies a lift amount of an inlet valve. A throttle valve is provided upstream of the inlet valve and varies an opening area of an induction passage. An automatic stopper automatically stops the internal combustion engine. A controller can put the internal combustion engine in a first induction control state in which the lift amount of the inlet valve is equal to or smaller than a predetermined amount and the opening of the throttle valve is larger than a predetermined opening with respect to a predetermined running state. The controller can put the internal combustion engine in a second induction control state in which the left amount of the inlet valve is larger than the predetermined amount and the opening of the throttle valve is equal to or smaller than the predetermined opening with respect to the predetermined running state.
    Type: Application
    Filed: February 14, 2011
    Publication date: August 18, 2011
    Inventor: Shinichi MURATA
  • Publication number: 20110107988
    Abstract: In a variable valve device for an internal combustion engine, which has a cam phase variable mechanism including a split variable function, when the operation of the internal combustion engine is in a predetermined extremely low speed and load region, the phase of a second intake cam is controlled to a more advanced position (S1) than the phase in which the closing timing of a second intake valve is in a most retarded position.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 12, 2011
    Inventor: Shinichi MURATA
  • Publication number: 20110107987
    Abstract: A variable valve device for an internal combustion engine includes a cam phase variable mechanism for varying a phase difference (split) between first and second intake cams. Under predetermined operating conditions of the internal combustion engine, the second intake cam is controlled to take a phase (split) (S1) which is within a predetermined pumping-loss reduction operation phase range and entails a minimum fluctuation (oscillation width) of drive torque on an intake camshaft.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 12, 2011
    Inventor: Shinichi MURATA
  • Publication number: 20110107992
    Abstract: A variable valve device for an internal combustion engine includes a first cam phase variable mechanism capable of varying the phases of both first and second intake cams by using operating oil pressure, and a second cam phase variable mechanism having a split change function and capable of varying the phase of the second intake cam relative to that of the first intake cam by using the operating oil pressure. When the engine is operating in a low-speed, low-load region (A) in which the engine rotating speed is lower than a predetermined rotating speed (N2) and at the same time the engine load is lower than a predetermined load (L1), the second cam phase variable mechanism is preferentially controlled over the first cam phase variable mechanism.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 12, 2011
    Inventor: Shinichi MURATA
  • Patent number: 7823550
    Abstract: An engine equipped with an adjustable valve timing mechanism includes: an inlet valve opening term varying mechanism, which is included in the adjustable valve timing mechanism, varying an opening term of an inlet valve; and an inlet valve opening term controller controlling the inlet valve opening term varying mechanism according to a running state of the engine, the inlet valve opening term varying mechanism setting the opening term of the inlet valve to an first inlet term while the engine runs at relatively high load and relatively high speed, the inlet valve opening term varying mechanism also setting the opening term of the inlet valve to a second inlet term, termination timing of the inlet valve opening of which is retarded compared to the termination timing of the inlet valve opening in the first inlet term, while the engine runs at relatively low load and relatively low speed.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: November 2, 2010
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventor: Shinichi Murata
  • Publication number: 20100212619
    Abstract: Each cylinder is provided with a first intake valve and a second intake valve, and a first intake cam for driving the first intake valve and a second intake cam for driving the second intake valve are coaxially pivotally supported on an intake camshaft. A first cam phase change mechanism which varies respective phases of the first and second intake cams relative to a crankshaft of the internal combustion engine is combined with a second cam phase change mechanism which varies a phase of the second intake cam relative to the first intake cam. The second cam phase change mechanism is set to have a variable-phase angular range wider than that of the first cam phase change mechanism.
    Type: Application
    Filed: February 22, 2010
    Publication date: August 26, 2010
    Inventor: Shinichi MURATA
  • Publication number: 20100212614
    Abstract: In an internal combustion engine with a variable valve gear, which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary at least the phase of the second intake cam, the second intake cam is set so that the open period of the second intake valve is longer than that of the first intake valve.
    Type: Application
    Filed: February 22, 2010
    Publication date: August 26, 2010
    Inventor: Shinichi MURATA
  • Publication number: 20100212618
    Abstract: In an engine which comprises a first intake valve and a second intake valve for each cylinder, configured to be driven by a first intake cam and a second intake cam, respectively, and a cam phase change mechanism configured to vary the phase of the second intake cam, the cam phase change mechanism is controlled so that the opening timing of the second intake valve is advanced ahead of that of the first intake valve in a start mode.
    Type: Application
    Filed: February 22, 2010
    Publication date: August 26, 2010
    Inventor: Shinichi MURATA
  • Publication number: 20100212617
    Abstract: In an engine with a cam phase change mechanism which is disposed on one end portion of an intake camshaft and variably changes a phase of a drive cam of an intake valve relative to a crankshaft, the cam phase change mechanism is configured so that two vane-type hydraulic actuators of which variable-phase torques produced at the same supplied oil pressure are different are arranged axially relative to the intake camshaft.
    Type: Application
    Filed: February 19, 2010
    Publication date: August 26, 2010
    Inventor: Shinichi MURATA
  • Patent number: 7770550
    Abstract: The invention provides a variable valve train for an internal combustion engine, in which attachment and detachment of a rotation drive source can be performed without an affect on a transmission mechanism and environment.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: August 10, 2010
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Mikio Tanabe, Shinichi Murata
  • Patent number: 7757647
    Abstract: A variable valve apparatus uses a camshaft provided rotatably in an internal combustion engine, and has a cam, a rocking cam driven by a cam, a intake valve or an exhaust valve driven by the rocking cam, a control shaft rotatably provided side by side with the camshaft in the engine, and has an oil passage inside to flow oil, a control arm whose one end is held by the control shaft, and the other end is projected from the control shaft, an actuator which rotates the control shaft, and displaces the control arm, a transmission arm which is rotatably connected to the other end of the control arm, and transmits the displacement of the control arm to the rocking cam, and a lubricant passage which is provided inside the control arm, and supplies oil in the oil passage to a part connecting the control arm and transmission arm.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: July 20, 2010
    Assignee: Mitsubishi Jidosha Kogyo Habushiki Kaisha
    Inventors: Mikio Tanabe, Shinichi Murata
  • Patent number: 7748358
    Abstract: A variable valve train apparatus (20) has a formed on a camshaft, a rocking cam driven by the cam, an intake valve or an exhaust valve driven by the rocking cam, a control shaft provided for rotation and side by side with the camshaft, a control arm having one end held on the control shaft and the other end projecting from the control shaft, an actuator which rotates the control shaft to displace the control arm, a transmission arm connected to the other end of the control arm for rocking motion around a rocking axis in substantially the same direction as an axial direction of the control shaft and transmits a displacement of the control arm to the rocking cam, and an adjustment mechanism which adjusts a distance between an axis of the control shaft and the rocking axis of the transmission arm.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: July 6, 2010
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Mikio Tanabe, Shinichi Murata
  • Patent number: 7730862
    Abstract: A valve mechanism for an internal combustion engine includes a first rocker arm (4) connected to an intake or exhaust valve and supported on a rocker shaft (3a), a second rocker arm (5) supported on the rocker shaft for being rotationally driven by a cam, a cylinder (10) formed on one of the first and second rocker arms (4, 5) and a first piston (11) provided in the cylinder, a contacting projection (4a) projecting on the other one of the first and second rocker arms, a return spring (12) for biasing the first piston in a direction in which the first piston contacts with the contacting projection, and a second piston (14) for displacing the first piston to a position at which the first piston does not contact with the contacting projection. The two pistons extend in parallel to each other when the first piston is at a non-contacting position.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: June 8, 2010
    Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Mikio Tanabe, Shinichi Murata, Masaru Mori, Yusuke Kido
  • Publication number: 20100116232
    Abstract: In a variable valve gear for an internal combustion engine provided with a camshaft phase change mechanism for variably controlling opening and closing timings of an intake valve, the camshaft phase change mechanism and a variable valve lift mechanism are controlled so that the closing timing of the intake valve is advanced beyond a predetermined range T1 including a bottom dead center when a load L of the internal combustion engine is less than a first predetermined value L1 and that the closing timing of the intake valve is delayed beyond the predetermined range T1 when the load L of the internal combustion engine is not less than the first predetermined value L1.
    Type: Application
    Filed: November 10, 2009
    Publication date: May 13, 2010
    Applicant: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
    Inventors: Hitoshi TODA, Masayuki TAKAGAKI, Satoshi YOSHIKAWA, Shinichi MURATA, Nobuaki MURAKAMI
  • Publication number: 20100116231
    Abstract: Disclosed is a variable valve gear comprising a camshaft phase change mechanism, which variably controls a phase of an intake cam with respect to a crankshaft, and a variable valve lift mechanism, which changes an opening timing of an intake valve more than a closing timing and basically continuously varies a lift and an open period of the intake valve. The lift and the open period are set lest the intake valve interfere with a piston of an engine, with the phase controlled to be most advanced by the camshaft phase change mechanism and the lift controlled to be maximal by the variable valve lift mechanism.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 13, 2010
    Inventors: Hitoshi TODA, Masayuki Takagaki, Shinichi Murata