Patents by Inventor Masahiro Soma

Masahiro Soma 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: 20180274507
    Abstract: An objective of the present invention is to provide a fuel rail that can be used at a high fuel pressure of 50 MPa or more, for example, has good engine mountability, and has improved material yield.
    Type: Application
    Filed: January 12, 2016
    Publication date: September 27, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Eiichi KUBOTA, Koji HARADA, Keiichi URAKI, Shinya NAKATANI, Hiroshi ONO, Masahiro SOMA
  • Patent number: 9765740
    Abstract: A fuel injection valve is provided that can reduce variations in stroke length by reducing distortion during welding, and consequently can reduce variations in flow rate of injected fuel. The fuel injection valve has a nozzle; a fixed valve that is press-fit into a tip of the nozzle and has a fuel injection port from which the fuel is injected; and a movable element that forms a fuel seal section by abutting against the fixed valve, and opens and closes the fuel injection port. The fixed valve and the nozzle are fixed in place by welding at a position with no space due to press-fitting. A groove that serves as an empty space is provided in a continuation of a welded section that is formed in the fixed valve and the nozzle by the welding.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: September 19, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Atsushi Takaoku, Yasuo Namaizawa, Hideharu Ehara, Masahiro Soma
  • Publication number: 20170260945
    Abstract: An object of the present invention is to provide a fuel rail which can realize weight reduction while enhancing the strength of a cross-hole portion. A fuel rail for an internal combustion engine according to the present invention includes a cylindrical fuel rail body 1 and an injector mounting portion 2 in which a hole 2d to supply a fuel to an injector is formed, and the injector is mounted. The injector mounting portion 2 is integrally molded in the fuel rail body 1 such that the fuel supply hole 2d crosses a center hole 1a of the fuel rail body 1. plurality of injector mounting portions 2 is included along a longitudinal direction of the fuel rail body 1. A thickness of a root portion of the injector mounting portion 2 is thicker than a thickness of the fuel rail body 1 disposed between two adjacent injector mounting portions 2.
    Type: Application
    Filed: July 10, 2015
    Publication date: September 14, 2017
    Inventors: Masahiro SOMA, Hiroshi ONO, Masaru KAWAI, Shinya NAKATANI, Keiichi URAKI
  • Publication number: 20170226978
    Abstract: Provided is a fuel rail that can achieve a reliable seal between a rail main unit and a cup, involving a short welding distance or a reduced amount of a brazing filler metal. In the fuel rail, a rail main unit 2 has a central hole and a rail main unit-side communication hole 10 that provides communication between the central hole and an outside of the rail main unit 2. An injector receiving member 5 has an injector insertion hole 7 into which an injector is inserted. The injector receiving member 5 is mounted in the rail main unit 2 such that the rail main unit-side communication hole 10 and the injector insertion hole 7 communicate with each other. The injector receiving member 5 has an injector receiving member-side communication hole 9 that provides communication between the rail main unit-side communication hole 10 and the injector insertion hole 7.
    Type: Application
    Filed: September 4, 2015
    Publication date: August 10, 2017
    Inventors: Masahiro SOMA, Hiroshi ONO, Keiichi URAKI, Masaru KAWAI, Shinya NAKATANI
  • Patent number: 9644587
    Abstract: In a fuel injection device having a sensor for detecting a state in the combustion chamber in a free end thereof, the noises that may be generated in the sensor signal transmitting member for transmitting the sensor signal are minimized. The fuel injection device comprises: a valve body (33) having a free end exposed to the combustion chamber (7) defined in the engine main body (3) and a base end located outside of the engine main body; a sensor (38) supported at a free end of the valve body to detect a state of the combustion chamber; an actuator (37) received in the valve body; a sensor signal transmitting member (91, 128) extending from the sensor to the base end of the valve body; a drive signal transmitting member (83, 84) extending from the actuator; and a first shield member (133) interposed between the sensor signal transmitting member and the drive signal transmitting member, the first shield member having an electro-conductive property and being grounded.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: May 9, 2017
    Assignees: Honda Motor Co., Ltd., Hitachi Automotive Systems, LTD.
    Inventors: Shusuke Akazaki, Masahiro Soma, Atsushi Takaoku
  • Patent number: 9617963
    Abstract: In a fuel injection valve, it is possible to obtain spray in which the penetrating force of injected fuel is suppressed. The fuel injection valve includes a valve seat that forms a gap with a valve body, the gap allowing fuel to pass therethrough, and multiple injection holes that are located further downstream from the gap. The fuel to which pressure is applied flows out from the injection holes. When the flow velocity of the fuel in the gap formed between the valve body and the valve seat is indicated by meters per second, the flow velocity is set to be greater than a value obtained by multiplying the square root of the pressure applied to the fuel by 28. In this manner, the flow velocity in the gap increases, and flow velocity distribution inside the injection hole is uniformized, thereby suppressing an increase in penetration.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: April 11, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Motoyuki Abe, Kiyotaka Ogura, Eiji Ishii, Tohru Ishikawa, Masahiro Soma, Hideharu Ehara
  • Patent number: 9429122
    Abstract: In a fuel injection device having a sensor for detecting a state in the combustion chamber in a free end thereof, the sensor signal transmitting member for transmitting the sensor signal is protected from vibrations and moisture. The fuel injection device comprises: a valve body (33) having a free end exposed to the combustion chamber (7) defined in the engine main body (3) and a base end located outside of the engine main body; a sensor (38) supported at the free end of the valve body to detect a state of the combustion chamber; a sensor signal transmitting member (91) extending from the sensor to the base end of the valve body along an exterior of the valve body to transmit a signal from the sensor; and a second resin portion (40) and/or a bonding agent (100) covering the sensor signal transmitting member and securing the sensor signal transmitting member onto an exterior of the valve body.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: August 30, 2016
    Assignees: Honda Motor Co., Ltd., Hitachi Automotive Systems, LTD.
    Inventors: Shusuke Akazaki, Masahiro Soma, Atsushi Takaoku
  • Patent number: 9376982
    Abstract: In consideration of a force acting on a valve, wear in the valve or in a valve seat is suppressed and thereby the frequency of lifetime use of a fuel injector is increased. In a control apparatus for controlling a driving current that is allowed to pass to a fuel injector including a solenoid, after a first injection pulse width for injecting fuel is finished and before a second injection pulse width, which is to be output subsequently to the first injection pulse width for injecting the fuel, is started, a third pulse width 421 for allowing the driving current to pass through the solenoid is output and the driving current that is to be allowed to flow through the solenoid by the third pulse 421 is controlled in accordance with one of a measurement value and a predictive value of a fuel pressure.
    Type: Grant
    Filed: July 20, 2012
    Date of Patent: June 28, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takaki Itaya, Hirotaka Nakai, Masahiro Soma
  • Patent number: 9309850
    Abstract: A fuel injection valve that injects fuel directly into a cylinder of an internal combustion engine includes: a nozzle inserted into a fuel injection valve fitting hole formed in the cylinder; a cylindrical tip seal holder attached to the nozzle; and an annular seal member that is fitted to the tip seal holder and seals between an inner circumferential surface of the fuel injection valve fitting hole and an outer circumferential surface of the tip seal holder.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: April 12, 2016
    Assignees: Hitachi Automotive Systems, Ltd., Honda Motor Co., Ltd.
    Inventors: Shusuke Akazaki, Atsushi Takaoku, Masahiro Soma
  • Publication number: 20150377200
    Abstract: In a fuel injection valve, it is possible to obtain spray in which the penetrating force of injected fuel is suppressed. The fuel injection valve includes a valve seat that forms a gap with a valve body, the gap allowing fuel to pass therethrough, and multiple injection holes that are located further downstream from the gap. The fuel to which pressure is applied flows out from the injection holes. When the flow velocity of the fuel in the gap formed between the valve body and the valve seat is indicated by meters per second, the flow velocity is set to be greater than a value obtained by multiplying the square root of the pressure applied to the fuel by 28. In this manner, the flow velocity in the gap increases, and flow velocity distribution inside the injection hole is uniformized, thereby suppressing an increase in penetration.
    Type: Application
    Filed: January 24, 2014
    Publication date: December 31, 2015
    Inventors: Motoyuki ABE, Kiyotaka OGURA, Eiji ISHII, Tohru ISHIKAWA, Masahiro SOMA, Hideharu EHARA
  • Publication number: 20150152823
    Abstract: In a fuel injection device having a sensor for detecting a state in the combustion chamber in a free end thereof, the sensor signal transmitting member for transmitting the sensor signal is protected from vibrations and moisture. The fuel injection device comprises: a valve body (33) having a free end exposed to the combustion chamber (7) defined in the engine main body (3) and a base end located outside of the engine main body; a sensor (38) supported at the free end of the valve body to detect a state of the combustion chamber; a sensor signal transmitting member (91) extending from the sensor to the base end of the valve body along an exterior of the valve body to transmit a signal from the sensor; and a second resin portion (40) and/or a bonding agent (100) covering the sensor signal transmitting member and securing the sensor signal transmitting member onto an exterior of the valve body.
    Type: Application
    Filed: June 7, 2013
    Publication date: June 4, 2015
    Inventors: Shusuke Akazaki, Masahiro Soma, Atsushi Takaoku
  • Publication number: 20150152824
    Abstract: In a fuel injection device having a sensor for detecting a state in the combustion chamber in a free end thereof, the noises that may be generated in the sensor signal transmitting member for transmitting the sensor signal are minimized. The fuel injection device comprises: a valve body (33) having a free end exposed to the combustion chamber (7) defined in the engine main body (3) and a base end located outside of the engine main body; a sensor (38) supported at a free end of the valve body to detect a state of the combustion chamber; an actuator (37) received in the valve body; a sensor signal transmitting member (91, 128) extending from the sensor to the base end of the valve body; a drive signal transmitting member (83, 84) extending from the actuator; and a first shield member (133) interposed between the sensor signal transmitting member and the drive signal transmitting member, the first shield member having an electro-conductive property and being grounded.
    Type: Application
    Filed: June 7, 2013
    Publication date: June 4, 2015
    Inventors: Shusuke Akazaki, Masahiro Soma, Atsushi Takaoku
  • Publication number: 20150115069
    Abstract: A fuel injection valve that injects fuel directly into a cylinder of an internal combustion engine includes: a nozzle inserted into a fuel injection valve fitting hole formed in the cylinder; a cylindrical tip seal holder attached to the nozzle; and an annular seal member that is fitted to the tip seal holder and seals between an inner circumferential surface of the fuel injection valve fitting hole and an outer circumferential surface of the tip seal holder.
    Type: Application
    Filed: June 7, 2013
    Publication date: April 30, 2015
    Inventors: Shusuke Akazaki, Atsushi Takaoku, Masahiro Soma
  • Publication number: 20140367498
    Abstract: A fuel injection valve is provided that can reduce variations in stroke length by reducing distortion during welding, and consequently can reduce variations in flow rate of injected fuel. The fuel injection valve has a nozzle; a fixed valve that is press-fit into a tip of the nozzle and has a fuel injection port from which the fuel is injected; and a movable element that forms a fuel seal section by abutting against the fixed valve, and opens and closes the fuel injection port. The fixed valve and the nozzle are fixed in place by welding at a position with no space due to press-fitting. A groove that serves as an empty space is provided in a continuation of a welded section that is formed in the fixed valve and the nozzle by the welding.
    Type: Application
    Filed: January 16, 2013
    Publication date: December 18, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Atsushi Takaoku, Yasuo Namaizawa, Hideharu Ehara, Masahiro Soma
  • Publication number: 20140240886
    Abstract: In consideration of a force acting on a valve, wear in the valve or in a valve seat is suppressed and thereby the frequency of lifetime use of a fuel injector is increased. In a control apparatus for controlling a driving current that is allowed to pass to a fuel injector including a solenoid, after a first injection pulse width for injecting fuel is finished and before a second injection pulse width, which is to be output subsequently to the first injection pulse width for injecting the fuel, is started, a third pulse width 421 for allowing the driving current to pass through the solenoid is output and the driving current that is to be allowed to flow through the solenoid by the third pulse 421 is controlled in accordance with one of a measurement value and a predictive value of a fuel pressure.
    Type: Application
    Filed: July 20, 2012
    Publication date: August 28, 2014
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Takaki Itaya, Hirotaka Nakai, Masahiro Soma
  • Patent number: 8599141
    Abstract: An input device is provided. The input device contains a face sheet, coordinate-inputting means opposing the lower portion of the face sheet, and switching means opposing the lower portion of the coordinate-inputting means. The face sheet, the coordinate-inputting means, and the switching means are laminated in a thickness direction. The coordinate-inputting means has X- and Y-direction electrodes opposing each other and arranged on both surfaces of a base sheet in a grid manner. The switching means has a substrate with a switch contact portions in a grid arrangement. The switch contact portions are switched by the inversion of invertible plates. Projections are disposed between the coordinate-inputting means and the invertible plates.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: December 3, 2013
    Assignee: Alps Electric Co., Ltd.
    Inventor: Masahiro Soma
  • Patent number: 8555858
    Abstract: A high pressure fuel pipe construction for an internal combustion engine, such as a direct injection engine. A conduit for the fuel is open at each end and a ball having a throughbore is slidably positioned over one end of the conduit. A reinforcing sleeve is positioned inside the end of the conduit so that the sleeve extends entirely through the ball. The sleeve, ball and the end of the conduit are then brazed together to attach the ball and conduit together. A double chamfer is provided at one end of the ball throughbore to facilitate inspection of the brazing quality. Additionally, a loop is formed in the conduit and a dampener is attached to the loop.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 15, 2013
    Assignee: Hitachi, Ltd
    Inventors: Harsha Badarinarayan, Akira Inoue, Takashi Yoshizawa, Atsushi Hohkita, Hiroaki Saeki, Hiroshi Ono, Masahiro Soma, William T. Harvey, Steven J. Miller, Su-Wei Sung
  • Publication number: 20130075501
    Abstract: Improving the injection fuel mass accuracy of fuel injector, it is necessary to make the fuel injector perform seat valve opening and closing operation quickly. When the shapes of a fixed core and an anchor are optimized to improve the responsiveness of a magnetic flux, it is necessary to ensure a sufficient fuel path area while preventing adhesion by making the adherence phenomenon rarely occur between an end face of the anchor and an end face of the fixed core. A through hole passes through an anchor forming an armature of an electromagnetic fuel injector from a face of the anchor where the anchor faces a fixed core to a back face where the through hole has a large-diameter portion and a small-diameter portion, and the large-diameter portion is located in an upstream part and is offset to the outer periphery with respect to the small-diameter portion.
    Type: Application
    Filed: July 9, 2012
    Publication date: March 28, 2013
    Inventors: Takao Miyake, Ryo Kusakabe, Motoyuki Abe, Masahiro Soma
  • Publication number: 20120227709
    Abstract: In a fuel injection device, a driving unit structure has a magnetic aperture, in which an inner diameter is gradually enlarged toward the mover side, provided in an inner peripheral surface of the magnetic core. It is possible to reduce magnetic delay time upon valve opening from the supply of the electric current to the coil to the rise of magnetic flux and magnetic delay time upon valve closing from the stoppage of the electric current to the coil to reduction of magnetic flux, by providing a magnetic aperture in the inner peripheral surface of the magnetic core. Thus it is possible to improve the dynamic responsiveness upon valve opening and valve closing.
    Type: Application
    Filed: March 9, 2012
    Publication date: September 13, 2012
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo KUSAKABE, Motoyuki Abe, Tohru Ishikawa, Noriyuki Maekawa, Masahiro Soma, Takao Miyake, Yasuo Namaizawa
  • Patent number: RE43864
    Abstract: A method and apparatus for attenuating fuel pump noise in a direct injection internal combustion engine. In one proposal, the direct injection fuel nozzle is suspended from a fuel rail in a fashion that avoids direct metal-to-metal contact between the injector and the engine block. The direct injection nozzle may also be connected to the fuel rail by a pair of spaced-apart seals which equalize the longitudinal pressure on the nozzle during operation. Enlarged diameter fuel reservoirs and/or a restricted orifice may be provided fluidly in series between the fuel pump and the direct injection nozzle in order to attenuate noise resulting from fuel pump pulsation.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: December 18, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Atsushi Watanabe, Harsha Badarinarayan, Jonathan Borg, Donald J. Mccune, Takuya Shiraishi, Atsushi Hohkita, Masahiro Soma, Hiroaki Saeki