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61. 发明专利

JPH05288051A 失效
公开(公告)号：JPH05288051A
公开(公告)日：1993-11-02
申请号：JP8887692
申请日：1992-04-09
申请人： MITSUBISHI HEAVY IND LTD
发明人： TAKAISHI TAKEO , TATEIWA MIKIO , GOSHIMA TADAHACHI
IPC分类号： F01P3/10 , F02F3/22
摘要： PURPOSE:To improve cooling performance of a piston crown by arranging a plurality of throttle nozzles having respective non-return needle valves in a cooling passage formed between the underside of the piston crown and the upper face of an inner piece internally mounted therein. CONSTITUTION:In a piston 1, a piston crown 4 and an inner piece 6 to form a cooling passage 5 on the inner face of the piston crown 4 are fitted to the extreme end flange part 3 of a connecting rod 2. The cooling passage 5 is communicated to an inflow passage 7 provided in the center of the connecting rod 2 and an outflow passage 8 provided on the outside of the flange part 3 of the connecting rod 2. A plurality of throttle nozzles 9 having respective non-return needle valves 10 are arranged in the cooling passage 5. Jet from the throttle nozzle 9 increases expanse and collides with the cooling face. In this way, cooling effect of the piston crown is improved, the temperature of the piston is decreased, and hence reliability is insured by preventing burning and lowering thermal stress.

62. 实用新型

JPH0566247U 失效
公开(公告)号：JPH0566247U
公开(公告)日：1993-09-03
申请号：JP1368692
申请日：1992-02-13
IPC分类号： F01P3/08 , F01P3/10 , F02F3/22

63. 发明专利

JPH04211763A PISTON FOR FOUR-CYCLE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH04211763A
公开(公告)日：1992-08-03
申请号：JP917591
申请日：1991-01-29
申请人： SULZER AG
发明人： YUAN MANUERU SHIYARERU
IPC分类号： F01P3/10 , F02B23/06 , F02B75/02 , F02F3/00 , F02F3/22 , F02F3/26 , F16J1/09 , F16J1/22
摘要： PURPOSE: To improve cooling performance under a high ignition pressure. CONSTITUTION: A piston is provided with a steel piston crown 1 and a cast iron skirt 2. The two components 1, 2 of the piston are held together by a screw 12 extending in the axial direction arranged along a circle. The piston crown 1 is engaged with the skirt 2 by a ring contact face, namely, a bearing face 16. A bearing 5 for one end of a connection rod 4 is arranged in the skirt 2 and a blind hole 18 which is faced to a combustion chamber 31 and fed liquid coolant is formed in the skirt. The screw 12 and the blind hole 18 are arranged completely outside the ring contact face, namely, the bearing face 16. A spray nozzle 19 which is so connected as to feed the liquid coolant to the bearing 5 for the connecting rod by a duct 20 in the skirt 2 is arranged in each blind hole 18.

64. 发明专利

JPH0473418A PISTON COOLING STRUCTURE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0473418A
公开(公告)日：1992-03-09
申请号：JP18681590
申请日：1990-07-13
申请人： TOYOTA MOTOR CORP
发明人： KATO ZENICHIRO
IPC分类号： F01M1/06 , F01P3/08 , F01P3/10 , F02B1/04 , F02F3/22 , F16C7/00 , F16C7/02 , F16C9/04 , F16J1/09
摘要： PURPOSE:To prevent the lubrication disorder by arranging a hole formed on a remote side half surface, viewed from the axis line of a main journal among the peripheral surface of a crankpin, so that a bearing hole and the crank angle coincide within a range of 0 - 90 deg. before the top and bottom dead centers. CONSTITUTION:At 40 deg. before the top dead center, a hole 8 on a crankpin and a hole 6 on a bearing metal coincide, and lubricating oil flows into a through hole 4 in a connecting rod from the hole 8 on the crankpin. The hole 8 on the crankpin is in the remote side half surface on the peripheral surface of the crankpin, viewed from the axis line of a main journal 9, and the supplied hydraulic pressure is increased by the centrifugal force, and the feed quantity into the clearance between the crankpin 3 and the bearing metal 2 is sufficiently much. At 40 deg. before the top dead center where both holes coincide, the supplied oil supplied into the through hole 4 in a connecting rod is collected once into the connecting rod, and immediately after the piston reaches the top dead center, the upward inertia load becomes max., and when the explosion load becomes max., the supplied oil is jetted towards the reverse surface of the piston from the hole at the small edge part.

65. 实用新型

JPH03118259U 失效
公开(公告)号：JPH03118259U
公开(公告)日：1991-12-06
申请号：JP2791990
申请日：1990-03-19
IPC分类号： F02F3/22 , F01P3/10 , F16J1/09

66. 发明专利

JPH03233163A CAST IRON PISTON 失效
公开(公告)号：JPH03233163A
公开(公告)日：1991-10-17
申请号：JP2723290
申请日：1990-02-08
申请人： HINO MOTORS LTD
发明人： SAGENAKA KIYOHIKO
IPC分类号： F02F3/00 , B22D19/00 , F01P3/10 , F02F3/22
摘要： PURPOSE:To improve circulation of oil so as to increase a cooling effect by constituting at least one of core fixing legs, when a cooling gallery of a cast iron piston is manufactured, of a cast iron-made leg, and internal chill-forming this leg when it is cast. CONSTITUTION:A leg 5, which is one of four legs 2, 3, 4, 5 for stabilizing a clean gallery-constituting sand core 1, is made of cast iron. When a piston 6 is cast, a part of vertically providing the legs 2, 3, 4, being constituted of sand, serves as discharge oil holes 7, 8, 9, but a hole 10 is formed in a shape of closing the bottom surface of a cooling gallery because the leg 5 is internal chill-formed integrally with the piston 6. Cooling oil is well circulated to also improve a cooling effect because no oil is discharged from this part.

67. 发明专利

JPH03134253A COOLING CAVITY-PROVIDED PISTON AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH03134253A
公开(公告)日：1991-06-07
申请号：JP27031089
申请日：1989-10-19
申请人： ART METAL MFG
发明人： SAKAKIBARA TATSUO
IPC分类号： F01P3/10 , F02F3/00 , F02F3/22 , F16J1/09
摘要： PURPOSE:To make even a pipe ring, having large cooling action with a large sectional area, applicable for a small piston further with casting made easily performable by exposing an internal peripheral surface of the pipe ring in a piston internal surface or holding the pipe ring with a core so as to cast the pipe ring. CONSTITUTION:A ring internal diameter D2 of a pipe ring 7 is a size such that at least one part of an inner side surface 8 of the ring 7 can be slightly exposed in an internal surface of a piston. While the ring 7 is fit-mounted to recessed surfaces 11, 11 provided in a top part of a core 10 formed with space 7 between pin bosses 5, 5, and the recessed surfaces 11, 11 are positioned on a center line O2 orthogonal with a center line O1 of the pin boss. Accordingly, when the ring is combination-cast in an outer mold 12, a part except brought into contact with the recessed surfaces 11, 11 is internally chilled by a ground metal, and a part, brought into contact with the recessed surfaces, is left as exposed parts 8a, 8b. Next by slightly generating engaging margin of the recessed surfaces 11, 11, when the core is forcedly drawn out, the exposed parts 8a, 8b can be mold-released by elastic deformation. Next, when a cooling oil inlet 13 and an outlet 14 are drilled, a cooling cavity 15 can be formed.

68. 实用新型

JPH0287945U 失效
公开(公告)号：JPH0287945U
公开(公告)日：1990-07-12
申请号：JP16639588
申请日：1988-12-23
IPC分类号： F01M1/06 , F01P3/10 , F02F3/00 , F02F3/22 , F16J1/09

69. 发明专利

JPS62237065A PISTON FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPS62237065A
公开(公告)日：1987-10-17
申请号：JP7928186
申请日：1986-04-08
申请人： HKS KK
发明人： HASEGAWA HIROYUKI , HIDAKA YOSHIAKI
IPC分类号： F01P3/10 , F02F3/22
摘要： PURPOSE:To promote cooling of a piston, by a method wherein a heat transfer fin is situated in the cooling flow passage of a piston body. CONSTITUTION:A cooling flow passage 38, through which cooling fluid is circulated, is formed to the interior of a piston body 14, and a heat transfer fin 43 is situated in the cooling flow passage 38. The heat transfer fin 43 is formed by bending a sheet, e.g., aluminium, etc., and is disposed circumferentially of an annular flow passage part 41 in the cooling flow passage 38. This constitution enables cooling of a piston.

70. 实用新型

JPS62111925U 失效
公开(公告)号：JPS62111925U
公开(公告)日：1987-07-16
申请号：JP20319585
申请日：1985-12-28
IPC分类号： F01P3/08 , F01P3/10 , F02F3/22

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