Patents by Inventor Daisuke Yoshika
Daisuke Yoshika 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).
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Patent number: 9032923Abstract: An engine with a variable valve device includes cylinders each provided with a plurality of intake valves, an outer camshaft for driving first intake cams, an inner camshaft arranged coaxially with the outer camshaft for driving second intake cams, and a cam phase change mechanism arranged at one end of the outer and inner camshafts and capable of varying the phase difference between the two camshafts. A first cam sensor for detecting the rotational angle of the outer camshaft and a second cam sensor for detecting the rotational angle of the inner camshaft are arranged close to the one end of the camshafts.Type: GrantFiled: January 28, 2011Date of Patent: May 19, 2015Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHAInventors: Daisuke Yoshika, Ayatoshi Matsunaga
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Patent number: 8939117Abstract: In a variable valve actuation device for an internal combustion engine, a hollow boss (22b) is fitted around the outer periphery of an outer camshaft (15a) and protrudes from one side of a second cam (22a) located opposite a first cam (20) in the width direction of the second cam over a distance greater than the width of the second cam, in order to suppress misalignment of the boss.Type: GrantFiled: December 3, 2010Date of Patent: January 27, 2015Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Daisuke Yoshika, Ayatoshi Matsunaga
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Patent number: 8607748Abstract: In an engine equipped with a variable valvetrain including a second cam phase alteration mechanism 31 for altering the phase of second intake cams 12 actuating second intake valves, relative to a crankshaft, the second cam phase alteration mechanism 31 is arranged at an end opposite to an end at which a cam sprocket is provided to receive power from the crankshaft, to be located outside a cylinder head 2, and an actuator cover 40 is fixed to the cylinder head 2 to cover at least a lower portion of the second cam phase alteration mechanism 31.Type: GrantFiled: December 20, 2010Date of Patent: December 17, 2013Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Ayatoshi Matsunaga, Shinichi Murata, Daisuke Yoshika
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Patent number: 8573169Abstract: A variable valve device of the invention has a structure in which, as connecting means for connecting a movable cam 22 located in an outer periphery of an outer camshaft 17a and an inner camshaft 17b located inside the outer camshaft 17a, there are provided a pin-like member 24 that is movably inserted so as to penetrate the movable cam 22, the outer camshaft 17a and the inner camshaft 17b along a diametrical direction of a shaft member 17 that is formed by turnably encasing the inner camshaft 17b in the outer camshaft 17a, and an escape-preventing portion 50 disposed in the end portion of the pin-like member 24. The movable cam 22 and the inner camshaft 17b are thus connected together while preventing large press-fit load and axial force from acting on components.Type: GrantFiled: December 20, 2010Date of Patent: November 5, 2013Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Ayatoshi Matsunaga, Daisuke Yoshika, Katsuhiro Tanaka, Shinichi Murata
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Publication number: 20120152192Abstract: In an engine equipped with a variable valvetrain including a second cam phase alteration mechanism 31 for altering the phase of second intake cams 12 actuating second intake valves, relative to a crankshaft, the second cam phase alteration mechanism 31 is arranged at an end opposite to an end at which a cam sprocket is provided to receive power from the crankshaft, to be located outside a cylinder head 2, and an actuator cover 40 is fixed to the cylinder head 2 to cover at least a lower portion of the second cam phase alteration mechanism 31.Type: ApplicationFiled: December 20, 2010Publication date: June 21, 2012Inventors: Ayatoshi Matsunaga, Shinichi Murata, Daisuke Yoshika
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Publication number: 20120152191Abstract: In a variable valve actuation device for an internal combustion engine, a hollow boss (22b) is fitted around the outer periphery of an outer camshaft (15a) and protrudes from one side of a second cam (22a) located opposite a first cam (20) in the width direction of the second cam over a distance greater than the width of the second cam, in order to suppress misalignment of the boss.Type: ApplicationFiled: December 3, 2010Publication date: June 21, 2012Inventors: Daisuke Yoshika, Ayatoshi Matsunaga
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Publication number: 20120145101Abstract: A variable valve device has a configuration in which a first cam (20) and a second cam (22a) that is a counterpart of the first cam are disposed in the outside of a shaft member (17) so that the second cam (22a) is displaceable in the circumferential direction, and is formed so that a cam face (22c) of the second cam has a cam width dimension a that is larger than a cam width b of a cam face of the first cam.Type: ApplicationFiled: November 22, 2010Publication date: June 14, 2012Inventors: Daisuke Yoshika, Shinichi Murata
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Patent number: 8061316Abstract: 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: GrantFiled: September 11, 2009Date of Patent: November 22, 2011Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Daisuke Yoshika, Shinichi Murata, Hitoshi Toda, Masayuki Takagaki
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Publication number: 20110197839Abstract: An engine with a variable valve device includes cylinders each provided with a plurality of intake valves, an outer camshaft for driving first intake cams, an inner camshaft arranged coaxially with the outer camshaft for driving second intake cams, and a cam phase change mechanism arranged at one end of the outer and inner camshafts and capable of varying the phase difference between the two camshafts. A first cam sensor for detecting the rotational angle of the outer camshaft and a second cam sensor for detecting the rotational angle of the inner camshaft are arranged close to the one end of the camshafts.Type: ApplicationFiled: January 28, 2011Publication date: August 18, 2011Inventors: Daisuke YOSHIKA, Ayatoshi Matsunaga
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Patent number: 7730859Abstract: A variable valve train system for an internal combustion engine wherein the engagement section of a transmission mechanism is lubricated by means of an existing part for driving a variable valve actuation mechanism. Gears forming the engagement section of the transmission mechanism are arranged at a position where the engagement section is lubricated with a lubricant scattered from an endless elongate member for driving a camshaft. The transmission mechanism can therefore be lubricated without the need for additional use of a lubricant passage and its associated elements, besides the existing parts for driving the variable valve actuation mechanism.Type: GrantFiled: March 17, 2008Date of Patent: June 8, 2010Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Mikio Tanabe, Daisuke Yoshika
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Publication number: 20100064993Abstract: 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: ApplicationFiled: September 11, 2009Publication date: March 18, 2010Inventors: Daisuke Yoshika, Shinichi Murata, Hitoshi Toda, Masayuki Takagaki
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Patent number: 7644690Abstract: An arrangement structure of an electrically-driven actuator is used in a variable valve operating mechanism capable of adjusting an operation of a valve of an engine. A part of the electrically driven actuator exposed to the outside of the engine is arranged at a position shifted in a car width direction with respect to an exothermic body provided at a periphery of the engine.Type: GrantFiled: October 30, 2007Date of Patent: January 12, 2010Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Daisuke Yoshika, Shinichi Murata, Hitoshi Toda, Masashi Igarashi
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Publication number: 20090000582Abstract: A variable valve train system for an internal combustion engine wherein the engagement section of a transmission mechanism is lubricated by means of an existing part for driving a variable valve actuation mechanism. Gears forming the engagement section of the transmission mechanism are arranged at a position where the engagement section is lubricated with a lubricant scattered from an endless elongate member for driving a camshaft. The transmission mechanism can therefore be lubricated without the need for additional use of a lubricant passage and its associated elements, besides the existing parts for driving the variable valve actuation mechanism.Type: ApplicationFiled: March 17, 2008Publication date: January 1, 2009Inventors: Mikio Tanabe, Daisuke Yoshika
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Publication number: 20080099707Abstract: An arrangement structure of an electrically-driven actuator is used in a variable valve operating mechanism capable of adjusting an operation of a valve of an engine. A part of the electrically driven actuator exposed to the outside of the engine is arranged at a position shifted in a car width direction with respect to an exothermic body provided at a periphery of the engine.Type: ApplicationFiled: October 30, 2007Publication date: May 1, 2008Inventors: Daisuke Yoshika, Shinichi Murata, Hitoshi Toda, Masashi Igarashi