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公开(公告)号：JP2002242617A
公开(公告)日：2002-08-28
申请号：JP2001036948
申请日：2001-02-14
Applicant: MAZDA MOTOR
Inventor： SUGIMOTO HIROYUKI , NISHIDA MASAMI , YAMATANI MITSUTAKA , TANAKA NOBUHIKO
Abstract: PROBLEM TO BE SOLVED: To increase a productivity and a maintainability by preventing a cap member 68 from being interfered with a head bolt while preventing the dimensions of a cylinder head 4 and an engine 1 from being increased when a VVT53 is disposed on the intake and exhaust camshafts 47 and 48 of the engine 1 and an OCV78 is disposed in the integral cap member 68 of the No.1 journal bearing part 49 of the cylinder head 4. SOLUTION: The cap member 68 is disposed so as to come into contact with a pair of right and left side head bolt through holes 51 at the front end part of a cylinder head on the front side of an engine in plan view, and cam cap parts 69 and 69 on both right and left sides are tightened to a head side bearing part 49 with two cap bolts 73 and 73. An OCV storage part 79 is provided on the inner side of the right and left side cam cap parts 69 so as to be swelled from the cam cap part 69 to the rear side of the engine, and the OCV78 stored vertically in the OCV storage part 79 is positioned so as to be held by the right and left side head bolt through holes 51 in plan view.
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公开(公告)号：JP2002168106A
公开(公告)日：2002-06-14
申请号：JP2000367993
申请日：2000-12-04
Applicant: MAZDA MOTOR
Inventor： TSUNODA TOSHIYA , NISHIDA MASAMI , YAMATANI MITSUTAKA , GOKIYU KATSUNORI
Abstract: PROBLEM TO BE SOLVED: To reduce a cost by surely oil-tightly connecting the upstream end part of a head side oil passage 85 to the downstream end part of a case side oil passage 101 without mounting a sealing member or the like when oil is fed to variable valve systems 53 and 54 through the oil passage 101 formed in a chain case 7. SOLUTION: An engine mount mounting part 92 is integrally formed with the chain case 7, and connected to a cylinder head front end wall part 4b with three bolts, and a case side jointing surface 100a formed on the engine mount mounting part 92 is oil-tightly jointed to a body side jointing surface 61a of the cylinder head front end wall part 4b. The downstream end part of the case side oil passage 101 is opened to the case side jointing surface 100a, and the upstream end part of the head side oil passage 85 is so opened as to communicate with the downstream opening part of the case side jointing surface 100a in the body side jointing surface 61a.
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公开(公告)号：JPH0821267A
公开(公告)日：1996-01-23
申请号：JP18088094
申请日：1994-07-07
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , DEGUCHI HIROAKI , HAYAKAWA MOTOO
Abstract: PURPOSE:To suppress the generation of a torque shock during variation of the opening state of an intake valve by a variable valve system. CONSTITUTION:In an engine 1 provided with variable valve systems 14a and 14b to vary the opening state of an intake valve 3, an engine control unit 16 is provided for suppressing the fluctuation of an air filling amount and the fluctuation of engine torque during variation of the opening state of the intake valve 3 by controlling the ignition timing of an ignition plug 20 and a bypass air amount through an ISC passage 11 arranged in an intake passage 5.
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公开(公告)号：JPH0726919A
公开(公告)日：1995-01-27
申请号：JP19403093
申请日：1993-07-09
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , DEGUCHI HIROAKI , FUKUMA MASANARI , ASAI AKIRA
Abstract: PURPOSE:To smooth relative axial movement by preventing occurrence of seizure even though the slide contact surfaces of a cam on a camshaft and a cam of a rockable cam follower are eccentrically worn due to a use frequency. CONSTITUTION:In an engine valve system, a rockable cam 4 has cam surfaces 18 which make slidable contact with intake and exhaust valves 3 through the intermediary of either one of movable members 16, that is, tappets and swing arms, and cam followers 19 which make slidable contact with cams 11 on a cam shaft 10, and is swingably supported, and the slidable contact surfaces of the cam followers 19 of the swingable cam 14 and the cams 11 on the cam shaft 10 are tapered toward the cam shaft 10 so that the valve timing is changed by relatively moving the cam shaft 10 in the direction thereof. The axial widths of the cams 11 and the cam followers 19 are different from each other, and the corner parts of the cam surfaces on the side where it is formed to be narrower, are rounded so as to have arcuate parts 19a, 19b.
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公开(公告)号：JPH06280526A
公开(公告)日：1994-10-04
申请号：JP7169593
申请日：1993-03-30
Applicant: MAZDA MOTOR
Inventor： ASAI AKIRA , DEGUCHI HIROAKI , NISHIDA MASAMI , FUKUMA MASANARI
Abstract: PURPOSE:To provide a means for preventing abrasion of oscillating cans with a valve timing control device in which the oscillating cams are oscillated by a rotary can. CONSTITUTION:In an engine E, radii of curvatures of cam surfaces of a first and a second oscillating cams 13, 14 are set larger at their portions being in contact with a first and a second intake cams 11, 12 when an intake valve lifting rate is large. A surface pressure is thus reduced for improving abrasion resistance. When lifting rates of the first and second oscillating cans 13, 14 is large, abrasion is not generated at portions of high surface pressure being abutted against with the first and second intake cams 11, 12, and durability of a cam mechanism is improved.
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Patent Agency Ranking
公开(公告)号：JPH06280524A
公开(公告)日：1994-10-04
申请号：JP7168793
申请日：1993-03-30
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , DEGUCHI HIROAKI , FUKUMA MASANARI , ASAI AKIRA
Abstract: PURPOSE:To provide a means for improving durability of a support mechanism of oscillating cams with a valve timing control device in which the oscillating cams are oscillated by means of a rotary cam which has a tapered cam surface formed on a cam shaft. CONSTITUTION:In an engine E, a first and a second oscillating cams 13, 14 are respectively integrated with a cylindrical first and second support members 19, 20 externally fitted to an oscillating shaft 18. A front end of the first support member 20 is abutted against a second bearing part 3. A rear end of the second support member 20 is abutted against a third bearing part 4, while a rear end of the first support member 19 is abutted against a front end of the second support member 20. Even in the case that front strong thrust force is supplied to the first and second oscillating cams 13, 14, accordingly, such thrust is received by the second bearing part 3. Strong force is not applied to the portion between the members composing the support mechanism for the oscillating cams 13, 14, so that durability of the support mechanism for the oscillating cams 13, 14 is improved.
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公开(公告)号：JPH0674011A
公开(公告)日：1994-03-15
申请号：JP34748792
申请日：1992-12-28
Applicant: MAZDA MOTOR
Inventor： NISHIDA MASAMI , FUKUMA MASANARI , ASAI AKIRA
IPC: F01L13/00
Abstract: PURPOSE:To reduce sliding spots necessary to rock a rocking cam for lifting an intake valve or exhaust valve of an engine. CONSTITUTION:A rocking cam 12 is rocked sliding through a rush adjuster on an intake or exhaust valve 10 of an engine to lift the valve 10 as it is rocked. The rocking cam 12 is formed on the cam surface with a lift arcuate part not to lift the valve 10 even in sliding on the valve 10 and a lift arcuate part to lift the valve 10 in sliding on the valve 10. A driving cam 14 is supported by a driving cam shaft 15 to rock the rocking cam 12 as it is rotated. The opening and closing timing of the valve 10 is changed by the shift of the rocking center of the rocking cam 12.
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公开(公告)号：JPH0674010A
公开(公告)日：1994-03-15
申请号：JP34747992
申请日：1992-12-28
Applicant: MAZDA MOTOR
Inventor： FUKUMA MASANARI , NISHIDA MASAMI , ASAI AKIRA
IPC: F01L13/00
Abstract: PURPOSE:To reduce sliding spots necessary for rocking a rocking cam to lift a valve while enabling an intake valve or exhaust valve of an engine to be stopped. CONSTITUTION:A rocking cam 12 rocks sliding through a rush adjuster 11 on an intake valve or exhaust valve 10 of an engine to lift the valve 10 along with the rocking. The rocking cam 12 is formed on the cam surface with a lift arcuate part not to lift the valve 10 even in the slide on the valve and a lift arcuate part to lift the valve 10 in the slide on the valve 10. A driving cam 14 is supported by a driving cam shaft 15 to rock the rocking cam 12 along with the rotation. When an angle made by the reference line L1 passing through the rocking center of the rocking cam 12 with a straight line L2 interconnecting the point of the rocking cam 12 contacting the driving cam 14 and the rocking center of the rocking cam 12 is changed, the opening and closing timing of the valve 10 is changed.
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公开(公告)号：JPS62237028A
公开(公告)日：1987-10-17
申请号：JP8058686
申请日：1986-04-08
Applicant: MAZDA MOTOR
Inventor： OKADA MASATOSHI , NISHIDA MASAMI , SOTOZONO KAZUAKI
Abstract: PURPOSE:To prevent the interference between a head cover and an intake pipe by positioning a suction valve inside each bank of a V-type engine and arranging an intake passage for other bank over each cam shaft and forming the cylinder head cover into projection form. CONSTITUTION:The intake port 6 of each bank of a V-type engine is installed inside the bank, and an intake passage 16 communicating to the intake port of other bank is arranged over the cam shaft 10 of each suction valve. The length of the intake passage can be set sufficiently long because of the arrangement of the intake passage, and supercharge is carried out by effectively utilizing the intake pulsation. Though the intake passage 16 interferes with a part of the cylinder head cover 15 in position relation, said interference can be prevented by forming the head cover part over the cam shaft 10 into a recessed part 18.
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公开(公告)号：JP2014167272A
公开(公告)日：2014-09-11
申请号：JP2013038931
申请日：2013-02-28
Applicant: Mazda Motor Corp , マツダ株式会社
Inventor： ASARI MOTOKI , MIYAMAE TORU , NISHIDA MASAMI
Abstract: PROBLEM TO BE SOLVED: To provide a fuel pump that enables suppression of stress concentration generated in a boundary portion between a diameter expansion part and a shaft part when a suction valve is closed without increasing the mass of the suction valve.SOLUTION: A fuel pump includes: a pressurization chamber for pressurizing fuel; a suction passage for sucking fuel to the pressurization chamber; and a suction valve 60 that enables communication or blocking between the pressurization chamber and the suction passage. The suction valve 60 includes: a shaft part 60A extended in the opening/closing direction and disposed on the suction passage side; and a diameter expansion part 60B installed at one end of the shaft part 60A and disposed on the pressurization chamber side. When the suction valve 60 is closed, a peripheral edge portion of a surface on the shaft part 60A side of the diameter expansion part 60B abuts on a seating portion that is installed in a connection part between the suction passage and the pressurization chamber. A hollow space 60D having a diameter R larger than a diameter r of the shaft part 60A is formed within the diameter expansion part 60B.
Abstract translation: 要解决的问题：提供一种燃料泵，其能够抑制当吸入阀关闭时在直径膨胀部分和轴部分之间的边界部分中产生的应力集中，而不增加吸入阀的质量。解决方案：燃料泵 包括：用于对燃料加压的加压室; 用于将燃料吸入加压室的吸入通道; 以及允许加压室和吸入通道之间的连通或阻塞的吸入阀60。 吸入阀60包括：沿打开/关闭方向延伸并设置在吸入通道侧的轴部60A; 以及安装在轴部60A的一端并设置在加压室侧的直径扩大部60B。 当吸入阀60关闭时，直径膨胀部60B的轴部60A侧的表面的周缘部与安装在吸入通路与加压室的连接部的安装部抵接。 在直径扩大部60B内形成直径R大于轴部60A的直径r的中空空间60D。
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