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公开(公告)号：US10393012B2
公开(公告)日：2019-08-27
申请号：US15151669
申请日：2016-05-11
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yoshiro Kamo , Shuichi Ezaki , Akio Kidooka
Abstract: The internal combustion engine comprises: operating members and operating by a predetermined pressure or more of oil pressure; a hydraulic oil path supplying hydraulic oil to the operating members through crank journals; a lubricating oil path supplying lubricating oil to crankpins through the crank journals; a hydraulic control valve linearly controlling an oil pressure supplied to the operating members due to change of that opening degree; and a control device. The control device controls the opening degree of the hydraulic control valve so that when operating the operating members, the predetermined pressure or more of oil pressure is supplied to the operating members, and controls the opening degree of the hydraulic control valve so that when not operating the operating members, less than the predetermined pressure of oil pressure is supplied to the operating members.
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公开(公告)号：US10082073B2
公开(公告)日：2018-09-25
申请号：US15537891
申请日：2015-12-22
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki , Yoshiro Kamo , Akio Kidooka
CPC classification number: F02B75/045 , F16C7/06 , F16C9/04 , F16C23/10 , F16C2360/22
Abstract: A variable length connecting rod includes a connecting rod body, an eccentric member, a first piston mechanism, a second piston mechanism and a flow-direction switching mechanism. The eccentric member, the first piston member, the second piston member and the flow-direction switching mechanism are provided in the connecting rod body. The first piston mechanism and the second piston mechanism are configured to pivot the eccentric member. The connecting rod body has a control oil passage that communicates with a first opening of the connecting rod and the flow-direction switching mechanism. The flow-direction switching mechanism is switched between the first state and the second state by switching pins. The switching pins are disposed in the connecting rod body such that directions in which the switching pins are operated are angled with respect to a plane perpendicular to an axis of the first opening.
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公开(公告)号：US09879571B2
公开(公告)日：2018-01-30
申请号：US15030150
申请日：2014-10-24
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki , Hidetoshi Hirose
CPC classification number: F01L1/185 , F01L1/053 , F01L1/18 , F01L1/2405 , F01L1/255 , F01L1/267 , F01L1/34416 , F01L13/0005 , F01L13/0036 , F01L13/0057 , F01L2001/0473 , F01L2810/04
Abstract: A valve mechanism includes: a support shaft immovably fixed to a main body of an internal combustion engine, a main arm swingably supported by the support shaft; two sub-arms arranged at both sides of the main arm; a coupling support portion swingably supporting and coupling the two sub-arms to the main arm; a cam; and a roller rotatably located in the main arm. Each of the two sub-arms includes: a drive unit pressing and driving a valve; and a contact portion contacting a plunger of a lash adjuster, the contact portion has a curved surface slidably contacting a flat surface formed in a tip portion of the plunger and having an arc-like curved surface shape of which a central axis line corresponds to a central swing axis line of the main arm in a state where the cam abuts on the roller in a base circular portion of the cam.
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Patent Agency Ranking
公开(公告)号：US10781746B2
公开(公告)日：2020-09-22
申请号：US15922245
申请日：2018-03-15
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki
Abstract: A variable compression ratio mechanism includes a variable length connecting rod. The variable length connecting rod includes a connecting rod body, an eccentric member, and an eccentric member drive mechanism. The eccentric member includes a piston pin receiving opening, is rotatably attached to the body, and changes in effective length when it is rotated. The eccentric member drive mechanism includes a projecting pin protruding from the body and rotating the eccentric member when a position of the projecting pin relative to the body changes. A guide member of the variable compression ratio mechanism guides the projecting pin during operation.
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公开(公告)号：US10408126B2
公开(公告)日：2019-09-10
申请号：US15538000
申请日：2015-12-22
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki , Akio Kidooka , Yoshiro Kamo
Abstract: A variable length connecting rod includes a connecting rod body, an eccentric member, a switching mechanism and a stopping mechanism. The eccentric member is provided at a small diameter end of the connecting rod body. The eccentric member rotates such that an effective length of the variable length connecting rod is varied. The switching mechanism includes a hydraulic piston connected to the eccentric member. The eccentric member reaches a first position when the switching mechanism is in a first state. The eccentric member reaches a second position when the switching mechanism is in a second state. The stopping mechanism includes a stopping member that abuts against or engages with the eccentric member or the hydraulic piston such that the eccentric member is maintained at an intermediate position between the first position and the second position.
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公开(公告)号：US10119462B2
公开(公告)日：2018-11-06
申请号：US15441815
申请日：2017-02-24
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki , Yoshiro Kamo , Akio Kidooka
Abstract: A variable length connecting rod comprises a connecting rod body, an eccentric member, a hydraulic cylinder, a hydraulic piston, a check valve, a switching mechanism and a hydraulic mechanism. The check valve permits a flow of hydraulic oil from a primary side of the check valve to a secondary side of the check valve and prohibits the flow from the secondary side to the primary side. The switching mechanism comprises a single switching pin. The connecting rod body is formed with first to fourth oil paths. The switching pin is switched between a first position making the first oil path communicate with the fourth oil path and making the second oil path communicate with the third oil path, and a second position making the first oil path communicate with the third oil path and making the second oil path communicate with the fourth oil path.
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公开(公告)号：US09958004B2
公开(公告)日：2018-05-01
申请号：US14919841
申请日：2015-10-22
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki , Akio Kidooka , Yoshiro Kamo
CPC classification number: F16C7/06 , F02B75/045 , F16C9/04 , F16C23/10 , F16C2360/22 , F16J7/00
Abstract: A variable length connecting rod which can change the effective length comprises a connecting rod body, an eccentric member which is attached at the small end to the connecting rod body to be able to swivel and which changes the effective length of a variable length connecting rod when swiveled, one piston mechanism which has one hydraulic cylinder which is provided in the connecting rod body and one hydraulic piston which slides in the hydraulic cylinder, a direction switching mechanism which switches between supply and discharge of hydraulic fluid to the hydraulic cylinder, and a hydraulic fluid supply source which supplies the hydraulic cylinder with hydraulic fluid. The piston mechanism is configured so that the eccentric member swivels in one direction if hydraulic fluid is supplied to the hydraulic cylinder and so that the eccentric member swivels in the other direction if hydraulic fluid is discharged from the hydraulic cylinder.
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公开(公告)号：US20180266314A1
公开(公告)日：2018-09-20
申请号：US15922245
申请日：2018-03-15
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shuichi Ezaki
Abstract: The variable compression ratio mechanism comprises a variable length connecting rod 6 able to be changed in effective length. The variable length connecting rod comprises a connecting rod body 30, an eccentric member 40 and an eccentric member drive mechanism 50. The eccentric member 40 is provided with a piston pin receiving opening 44, is rotatably attached to the body, and changes in effective length if it is rotated. The eccentric member drive mechanism 50 comprises a projecting pin 66 sticking out from the body and making the eccentric member rotate if a relative position of the projecting pin to the body changes. The variable compression ratio mechanism further comprises a guide member for guiding the projecting pin during operation of the internal combustion engine. The guide member guides the projecting pin so that the relative position of the projecting pin changes if the guide position is changed.
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