公开(公告)号：JP2013224640A

公开(公告)日：2013-10-31

申请号：JP2012097895

申请日：2012-04-23

Applicant: Mazda Motor Corp ,  マツダ株式会社

Inventor： NISHIDA MASAMI ,  GOTO KEIJI ,  MIYAZAKI TAKAO

IPC: F02M61/18

Abstract: PROBLEM TO BE SOLVED: To further enhance combustion performance during low load by suppressing deterioration of atomization of fuel while securing the strength of a distal end wall part by reducing tension stress generated in the distal end wall part of a valve body by combustion pressure in a fuel injection valve of an engine.SOLUTION: An outer surface of a distal end wall part of a valve body constituting a fuel injection valve has a dome shape concaved into an inner side of the valve body and a precompressing generating ring applying compression force in advance is arranged at least in an outer peripheral surface of the distal end wall part of the valve body.

Abstract translation: 要解决的问题：为了进一步提高低负荷时的燃烧性能，同时通过减小在阀体的前端壁部产生的张力，同时确保前端壁部的强度，同时通过燃烧压力 燃料喷射阀。构成燃料喷射阀的阀体的前端壁部的外表面具有凹入阀体内侧的圆顶形状和预先施加压力的预压生成环 至少设置在阀体的前端壁部的外周面上。

公开(公告)号：JP2013127255A

公开(公告)日：2013-06-27

申请号：JP2013021640

申请日：2013-02-06

Applicant: Mazda Motor Corp ,  マツダ株式会社

Inventor： GOTO TAKESHI ,  KUDO HIDETOSHI ,  NAKAHARA KOJI ,  NISHIDA MASAMI

IPC: F02B23/08 ,  F02B23/10 ,  F02F1/00 ,  F02F1/24 ,  F02F3/00 ,  F02F3/26 ,  F02F3/28

CPC classification number: Y02T10/125

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a spark-ignition internal combustion engine which can secure engine power while a geometrical compression ratio is a high compression ratio.SOLUTION: The method includes steps of: setting the geometrical compression ratio to 14 or higher; setting the open/close timing of an intake valve and an exhaust valve in such a way that valve opening periods of the intake valve and the exhaust valve are overlapped with each other across the top dead center in an operation region where knocking is concerned, and the overlap period is 35°CA or higher in an operation condition of at least part of the operation region; setting each of a clearance between a piston upper surface at the top dead center and an intake valve lower surface in valve opening and a clearance between the piston upper surface at the top dead center and an exhaust valve lower surface in valve opening to 5 mm or larger; and setting a stroke S and a bore diameter B in such a way that a relationship of 81.2 mm≤piston stroke S (mm)≤0.977×cylinder bore diameter B (mm)+18.2 mm is satisfied.

Abstract translation: 要解决的问题：提供一种能够在几何压缩比高压缩比的情况下确保发动机功率的火花点火式内燃机的制造方法。 解决方案：该方法包括以下步骤：将几何压缩比设置为14或更高; 设定进气门和排气门的打开/关闭正时，使得进气门和排气门的开阀时间在关于冲击的操作区域中的上死点彼此重叠，并且 在操作区域的至少一部分的操作条件下，重叠周期为35°CA以上; 设置上止点的活塞上表面与阀开口中的进气阀下表面之间的间隙和阀门开口处的活塞上表面与排气阀下表面之间的间隙至5mm，或 较大 并设定行程S和孔径B，使得满足81.2mm≤活塞冲程S（mm）≤0.977×气缸内径B（mm）+18.2mm的关系。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2008144618A

公开(公告)日：2008-06-26

申请号：JP2006330216

申请日：2006-12-07

Applicant: Mazda Motor Corp ,  マツダ株式会社

Inventor： MATSUURA HIROKAZU ,  KOTANI TOSHIMASA ,  SUGIHARA SHINICHI ,  NISHIDA MASAMI

IPC: F01L13/00

Abstract: PROBLEM TO BE SOLVED: To enhance durability by supporting the reaction force by a rigid structure.
SOLUTION: This variable valve gear comprises a variable valve lift mechanism for changing a valve lift by an oscillating cam 15. The variable valve lift mechanism comprises a control shaft 12 arranged parallel to a crankshaft, an offset cam 20 rotated when the camshaft11 is rotated, an offset cam link 21 fitted to the outer periphery of the offset cam 20 rotatably relative to each other, a connection link member 18 for connecting the offset link and the oscillating cam 15 to each other, a control link member 22 having one end 22a connected to the offset cam link 21, and a control arm 23 having a base end secured to the control shaft 12 and a free end connected to the other end 22b of the control link member 22. The control link member 22 and the control arm 23 are arranged in a pair on both sides of the offset cam link 21 in the axial direction of the camshaft 12.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：通过刚性结构支撑反作用力来提高耐久性。 解决方案：该可变阀齿轮包括用于通过摆动凸轮15改变气门升程的可变气门升程机构。可变气门升程机构包括平行于曲轴的控制轴12，当凸轮轴11 相对于彼此可旋转地安装在偏置凸轮20的外周的偏置凸轮连杆21，用于将偏移连杆和摆动凸轮15彼此连接的连接连接部件18，具有一个 连接到偏移凸轮连杆21的端部22a和具有固定到控制轴12的基端的控制臂23和连接到控制连杆构件22的另一端22b的自由端。控制连杆构件22和控制 臂23在凸轮轴12的轴向方向上成对地配置在偏置凸轮连杆21的两侧。（C）版权所有（C）2008，JPO＆INPIT

公开(公告)号：JPH07332045A

公开(公告)日：1995-12-19

申请号：JP15167594

申请日：1994-06-08

Applicant: MAZDA MOTOR

Inventor： DEGUCHI HIROAKI ,  NISHIDA MASAMI ,  ASAI AKIRA

IPC: F01L1/04 ,  F01L1/08 ,  F01L1/26 ,  F01L13/00 ,  F02D13/02

Abstract: PURPOSE:To ensure appropriate intake filling quantity by providing at least two intake valves per one air cylinder, and approximately fixedly closing at least one intake valve, and also controlling the other intake valve so as to gradually increase its lift quantity according to the increment of a load, in an engine low rotation area. CONSTITUTION:In such a device that the valve lift quantity and valve opening period of a pair of intake valves 14, 15 are changed by axially moving a camshaft 3 rotatively mounted on a cylinder head 1 by the operation of an oil pressure cylinder 9, the opposed intake valves 14, 15 are lifted through tappets 17, 17 by means of swinging cams 25, 25 to be swingably driven by driving cams 22, 23 provide on the camshaft 3. Each of driving cams 22, 23 is formed in such a manner that the intake valve 14 is approximately fixdely closed, while the intake valve 15 is made to continuously gradually increase at least one of the lift quantity or the valve opening period according to the increment of an engine load, in an engine low rotation area, hereby, appropriate intake filling quantity is always ensured.

公开(公告)号：JPH07133709A

公开(公告)日：1995-05-23

申请号：JP6094294

申请日：1994-03-30

Applicant: MAZDA MOTOR

Inventor： ASAI AKIRA ,  NISHIDA MASAMI ,  FUKUMA MASANARI ,  DEGUCHI HIROAKI

IPC: F01L1/08 ,  F01L1/12 ,  F01L13/00

Abstract: PURPOSE:To make smooth switching operation of a valve of an engine and others even in high speed rotation. CONSTITUTION:A driving can 3 which rotates synchronously with an engine, a cam follower 43, and a cam 44 are installed. An oscillating cam 4 which slidingly contacts with the driving cam 3, and a valve 5 which is lifted with the oscillating cam 4 are installed, and the driving can 3 has specified length in the axial direction, and a tapered can surface 31 which inclines at a specified angle in the axial direction on the circumference of the driving cam 3, and equal velocity operation sections C1, C2 are formed over the whole region in the axial direction of the tapered cam surface 31. The sliding contact surface having a circular arc cross section is formed in the cam follower 4 of the oscillation cam 4, and a valve operation equal velocity section 11 in which the valve 5 is moved in equal velocity is formed in the cam 44.

公开(公告)号：JPH06288213A

公开(公告)日：1994-10-11

申请号：JP7465893

申请日：1993-03-31

Applicant: MAZDA MOTOR

Inventor： FUKUMA MASANARI ,  DEGUCHI HIROAKI ,  NISHIDA MASAMI ,  ASAI AKIRA

IPC: F01L1/04 ,  F01L1/26 ,  F01L13/00 ,  F01M1/02 ,  F02D11/06

Abstract: PURPOSE:To provide a means capable of supplying working oil to a valve timing control device of a hydraulic drive type at proper hydraulic pressure and in a proper supply amount regardless of engine speed. CONSTITUTION:On a camshaft 3, a cam 13 for pump driving with a tapered cam face extending forward is provided. To move the camshaft 3 in the longitudinal direction, a valve timing control device 7 driven by working oil supplied from an oil pump 15 is provided. Hereby, at the time of high rotation, the camshaft 3 is arranged at a front position by the valve timing control device 7, and at this time, the oil pump 15 is driven at a rear part of the cam for pump driving, that is, at a part where cam diameter is small, and accordingly, excessive rise of a discharge amount and discharge pressure is prevented. Conversely, at the time of low rotation, the camshaft 3 is arranged at a rear position, the oil pump 15 is driven at a front part of the cam 13 for pump driving, and a sufficient discharge amount and discharge pressure are secured.

公开(公告)号：JPH06280521A

公开(公告)日：1994-10-04

申请号：JP6952593

申请日：1993-03-29

Applicant: MAZDA MOTOR

Inventor： NISHIMOTO TOSHIRO ,  NAKATANI SHIGEKI ,  NISHIDA MASAMI ,  MATSUURA HIROKAZU

IPC: F01L1/18 ,  F01L1/26 ,  F01L13/00

Abstract: PURPOSE:To prevent deterioration of engine performance and provide a compact valve system by providing a tapered roller being in contact with a driving cam on an oscillating can, and driving the oscillating can by means of the driving can through the roller. CONSTITUTION:A tapered driving can 12 which is rotated synchronously to an engine is provided. An oscillating cam 18 is driven by the driving cam 12. A swing arm 26 lifts an intake valve 8 and an exhaust valve 10 following the oscillating can 18. A tapered roller 22 being in contact with the driving cam 12 is provided on the oscillating cam 18. The oscillating cam 18 is driven by the driving cam 12 through the roller 22. Since the driving cam 12 is in rolling contact with the roller 22 of the oscillating cam 18, sliding resistance is remarkably reduced. A lamp part 17 of the driving cam 12 is contact with the roller 22, while a contact between the oscillating cam 18 and the swing arm 26 approaches the contact between the swing arm 26, and valves 8, 10. Engine performance is thus prevented from deteriorating, and a compact valve system is obtained.

公开(公告)号：JPH06229214A

公开(公告)日：1994-08-16

申请号：JP3951293

申请日：1993-02-02

Applicant: MAZDA MOTOR

Inventor： NISHIDA MASAMI ,  FUKUMA MASANARI ,  ASAI AKIRA ,  DEGUCHI HIROAKI

IPC: F01L1/12 ,  F01L13/00

Abstract: PURPOSE:To obviate the necessity of a driving means such as a large output power cylinder or motor for axially moving a cam shaft in an engine in which a cam shaft incorporating a tapered cam is axially moved so as to change the valve timing. CONSTITUTION:First and second drive gears 41, 42 are rotatably fitted on first and second cam shafts 10, 12 which are rotated in reverse directions, respectively, and first and second clutches 47, 48 are adapted to engage these cam gears with the respective cam shafts. A slide member 50 adapted to be axially moved together with the cam shafts 10, 12 in one unit body, is fitted thereon with a driven gear 53 meshed with the first and second driving gear. If one of the first and second electromagnetic clutches engages the associated one of the first and second driving gears with the associated one of the cam shaft, both cam shafts are axially moved in a specific direction by the rotation of the associated one of the cam shafts through the intermediary of the slide member.

公开(公告)号：JPH04124417A

公开(公告)日：1992-04-24

申请号：JP24420090

申请日：1990-09-14

Applicant: MAZDA MOTOR

Inventor： TOKUYAMA MASAKAZU ,  ABE RYOJI ,  NISHIDA MASAMI

IPC: F01M1/06 ,  F01L1/24 ,  F01L1/34 ,  F01M1/16 ,  F01M9/10

Abstract: PURPOSE:To supply high oil pressure to a lash adjuster and a variable valve timing mechanism for accurate operation by connecting an oil passage for the variable valve timing mechanism and an oil passage for a cam journal part to an oil introduction passage while connecting an oil passage to the lash adjuster. CONSTITUTION:A first oil introduction passage 15 is communicated with a variable valve timing oil passage 18 for a variable valve timing mechanism 13 inside a cylinder head 2. The first oil introduction passage 15 is also connected to cam journal oil passages 17, 17 on an intake side and an exhaust side via throttle parts 21, 21 respectively. A second oil introduction passage 16 is, on the other hand, communicated with lash adjuster oil passages 19, 19. With this constitution, supply of high oil pressure to the variable valve timing mechanism 13 and a lash adjuster arranged in the cylinder head 2 can be secured.

公开(公告)号：JPH0315622A

公开(公告)日：1991-01-24

申请号：JP15077989

申请日：1989-06-13

Applicant: MAZDA MOTOR

Inventor： NISHIDA MASAMI ,  CHIYOUSHI MASAHIRO

IPC: F02B29/00 ,  F02F1/42 ,  F02M69/00 ,  F02M69/04

Abstract: PURPOSE:To improve distribution of fuel as well as to reduce flow resistance by forming a cross sectional shape of each of branch parts so that the radius of the inner circumferential part is larger than the radius of the outer circumferential part when a branch middle part of a port is cut in perpendicular to the flow direction. CONSTITUTION:At least an intake port 5 which opens in a combustion chamber 4 of an engine is formed by a common part 51, a branch middle part 54 and each of branch parts 52 and 53. Also, a tip end part of a fuel injection valve 3 is inserted into an escape groove 9 communicated with the intake port 5. In this case, when the intake port 5 is cut in perpendicular to the flow direction of intake air at least at the branch middle part 54, a cross sectional shape of each of the branch parts 52 and 53 is formed so that the radius Ra of the inner circumferential part is in the shape of a semicircle larger than the radius Rb of the outer circumferential part. And each of the branch parts 52 and 53 is formed so that the common part 51 in the shape of a circle is gradually separated in the half-cut state. By this, flow resistance f the intake air is reduced and distribution of fuel is improved.