Patents by Inventor Kazuki Arima
Kazuki Arima 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: 11772744Abstract: A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.Type: GrantFiled: February 3, 2023Date of Patent: October 3, 2023Assignee: KAWASAKI MOTORS, LTD.Inventors: Kengo Ueda, Hiroyuki Watanabe, Kazuki Arima
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Publication number: 20230182863Abstract: A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.Type: ApplicationFiled: February 3, 2023Publication date: June 15, 2023Inventors: Kengo UEDA, Hiroyuki WATANABE, Kazuki ARIMA
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Patent number: 11597472Abstract: A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.Type: GrantFiled: August 13, 2021Date of Patent: March 7, 2023Assignee: KAWASAKI MOTORS, LTD.Inventors: Kengo Ueda, Hiroyuki Watanabe, Kazuki Arima
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Publication number: 20220111927Abstract: A control device of a gear transmission-equipped vehicle includes a power controller that starts power reduction control when it is determined that a start condition is satisfied, the power reduction control being control of reducing power transmitted from a driving source to a gear transmission. The start condition includes: a condition that a detection value of a gear position sensor that detects a current gear position of the gear transmission falls within a transition region between engagement regions corresponding to respective gear positions; and a condition that a speed difference obtained by subtracting a rotational speed of an output shaft of the gear transmission from a rotational speed of an input shaft of the gear transmission is a threshold or more.Type: ApplicationFiled: August 13, 2021Publication date: April 14, 2022Inventors: Kengo UEDA, Hiroyuki WATANABE, Kazuki ARIMA
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Patent number: 10639824Abstract: The present invention provides a die assembly for molding a resin-made insert having a sleeve that is inserted into an intake port of an internal combustion engine. Each sleeve has one inlet and two outlets. The die assembly includes an inner die and an outer die. The inner die includes an inlet side part and an outlet side part. The inlet side part and the outlet side part mold an inner peripheral surface of the sleeve in an assembled state, and are removed in mutually opposite directions. By means of this assembly, a sleeve having a complicated structure and shape can be molded easily.Type: GrantFiled: July 30, 2015Date of Patent: May 5, 2020Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Arima, Takuya Taniguchi
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Patent number: 10107161Abstract: A breather device includes: a breather chamber into which oil mist in a crank chamber of a combustion engine is introduced; and a breather passage configured to guide oil mist from a crank chamber into the breather chamber. The breather chamber has formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed. An introduction pipe forming a part of the breather passage is communicated with an upper portion of the crank chamber, and projects upward from an upper end portion of the crank case.Type: GrantFiled: June 29, 2015Date of Patent: October 23, 2018Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Yoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Akira Tomofuji
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Publication number: 20180215081Abstract: The present invention provides a die assembly for molding a resin-made insert having a sleeve that is inserted into an intake port of an internal combustion engine. Each sleeve has one inlet and two outlets. The die assembly includes an inner die and an outer die. The inner die includes an inlet side part and an outlet side part. The inlet side part and the outlet side part mold an inner peripheral surface of the sleeve in an assembled state, and are removed in mutually opposite directions. By means of this assembly, a sleeve having a complicated structure and shape can be molded easily.Type: ApplicationFiled: July 30, 2015Publication date: August 2, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki ARIMA, Takuya TANIGUCHI
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Patent number: 9784149Abstract: An oil strainer which sucks an oil is disposed within an oil pan connected to a lower portion of a combustion engine. The oil strainer includes a strainer main body, which accommodates a filter element and extends so as to be inclined relative to a horizontal line, a suction port formed in a lower portion of the strainer main body, and a discharge port formed in an upper portion of the strainer main body.Type: GrantFiled: November 13, 2014Date of Patent: October 10, 2017Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Yoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Shingo Tanimoto
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Publication number: 20160032797Abstract: A breather device includes: a breather chamber into which oil mist in a crank chamber of a combustion engine is introduced; and a breather passage configured to guide oil mist from a crank chamber into the breather chamber. The breather chamber has formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed. An introduction pipe forming a part of the breather passage is communicated with an upper portion of the crank chamber, and projects upward from an upper end portion of the crank case.Type: ApplicationFiled: June 29, 2015Publication date: February 4, 2016Inventors: Yoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Akira Tomofuji
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Publication number: 20150136064Abstract: An oil strainer which sucks an oil is disposed within an oil pan connected to a lower portion of a combustion engine. The oil strainer includes a strainer main body, which accommodates a filter element and extends so as to be inclined relative to a horizontal line, a suction port formed in a lower portion of the strainer main body, and a discharge port formed in an upper portion of the strainer main body.Type: ApplicationFiled: November 13, 2014Publication date: May 21, 2015Inventors: Yoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Shingo Tanimoto
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Patent number: 9011012Abstract: A bearing cap (11) fastened to a bulkhead (2) of a cylinder block (1) by bolts to support a crankshaft. A pair of protruding parts (25, 26) that enlarge a joint surface (12) between the bearing cap (11) and the bulkhead (2) in a transverse direction of the crankshaft are formed respectively in a pair of side surfaces (33, 34). A pair of reinforcing parts (35, 36) are positioned between a top surface (19) and the pair of protruding parts (25, 26), protrude from the pair of side surfaces (33, 34) in the transverse direction of the crankshaft, and have a protrusion length that is smaller than that of the pair of protruding parts (25, 26). The stress on the joint portion between the bearing cap (11) and the bulkhead (2) generated by the crankshaft during operation of the internal combustion engine is thereby reduced.Type: GrantFiled: November 14, 2011Date of Patent: April 21, 2015Assignee: Nissan Motor Co., Ltd.Inventors: Hiroaki Hoshikawa, Kazuki Arima
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Publication number: 20130163906Abstract: A bearing cap (11) fastened to a bulkhead (2) of a cylinder block (1) by bolts to support a crankshaft. A pair of protruding parts (25, 26) that enlarge a joint surface (12) between the bearing cap (11) and the bulkhead (2) in a transverse direction of the crankshaft are formed respectively in a pair of side surfaces (33, 34). A pair of reinforcing parts (35, 36) are positioned between a top surface (19) and the pair of protruding parts (25, 26), protrude from the pair of side surfaces (33, 34) in the transverse direction of the crankshaft, and have a protrusion length that is smaller than that of the pair of protruding parts (25, 26). The stress on the joint portion between the bearing cap (11) and the bulkhead (2) generated by the crankshaft during operation of the internal combustion engine is thereby reduced.Type: ApplicationFiled: November 14, 2011Publication date: June 27, 2013Inventors: Hiroaki Hoshikawa, Kazuki Arima
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Patent number: 7707980Abstract: A variable valve actuation mechanism for an internal combustion engine includes a drive shaft that rotates in operative association with rotation of a crankshaft, thereby to drive an intake or exhaust valve to open or close by way of a rocker arm; and a control shaft that is rotated by driving of a control shaft actuator and that causes variation of the position of the rocker arm, thereby to cause a lift characteristic of the intake or exhaust valve to be continuously variable. The control shaft includes a flange portion protruding from an outer circumferential surface of the control shaft to thereby regulate movement in an axial direction of the control shaft. A cylinder head rotatably supporting the control shaft includes a flange bearing portion that contacts the flange portion. The flange portion includes a stopper protrusion that protrudes from the flange portion and that contacts the flange bearing portion, thereby to regulate a rotation range of the control shaft.Type: GrantFiled: September 14, 2007Date of Patent: May 4, 2010Assignee: Nissan Motor Co., Ltd.Inventor: Kazuki Arima
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Publication number: 20080066702Abstract: A variable valve actuation mechanism for an internal combustion engine includes a drive shaft that rotates in operative association with rotation of a crankshaft, thereby to drive an intake or exhaust valve to open or close by way of a rocker arm; and a control shaft that is rotated by driving of a control shaft actuator and that causes variation of the position of the rocker arm, thereby to cause a lift characteristic of the intake or exhaust valve to be continuously variable. The control shaft includes a flange portion protruding from an outer circumferential surface of the control shaft to thereby regulate movement in an axial direction of the control shaft. A cylinder head rotatably supporting the control shaft includes a flange bearing portion that contacts the flange portion. The flange portion includes a stopper protrusion that protrudes from the flange portion and that contacts the flange bearing portion, thereby to regulate a rotation range of the control shaft.Type: ApplicationFiled: September 14, 2007Publication date: March 20, 2008Inventor: Kazuki Arima