公开(公告)号：WO1997041341A1

公开(公告)日：1997-11-06

申请号：PCT/US1996006213

申请日：1996-04-26

Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY

Inventor： U.S. ENVIRONMENTAL PROTECTION AGENCY ,  GRAY, Charles, L., Jr.

IPC: F02F03/26

CPC classification number: F02B75/02 ,  F02B41/00 ,  F02B77/11 ,  F05C2201/0448

Abstract: An internal combustion engine includes a cylinder (21), a head (58) closing one end of the cylinder (21) and a piston (24) slidably mounted in the cylinder (22) for reciprocating motion in the usual manner, wherein reciprocation is converted into rotary motion for example, by a conventional crankshaft. The top surface (32) of the piston (24), cylinder head (58) and cylinder (21) serve as walls defining a system chamber (70) with a pocket (36) formed in one of the system chamber walls for receiving fuel and serving as a combustion chamber (70) for localized combustion therein. In one disclosed embodiment, the cylinder (21) is divided into two sections (21 and 22) with thermal insulation (14, 30) serving as a heat barrier disposed between the two sections (21 and 22) and the piston (24) has a hollow interior containing one or more heat shields (41, 42) spanning the hollow interior.

Abstract translation: 内燃机包括气缸（21），封闭气缸（21）的一端的头部（58）和可滑动地安装在气缸（22）中的活塞（24），用于以常规方式往复运动，其中往复运动 例如通过传统的曲轴转换成旋转运动。 活塞（24）的顶面（32），气缸盖（58）和气缸（21）用作限定系统室（70）的壁，其中形成在系统室壁之一中的口（36），用于接收燃料 并用作其中局部燃烧的燃烧室（70）。 在一个所公开的实施例中，气缸（21）被分成两部分（21和22），其中隔热层（14,30）用作设置在两个部分（21和22）之间的热障，并且活塞（24）具有 中空的内部，其包含跨过中空内部的一个或多个隔热罩（41,42）。

公开(公告)号：WO1988002813A1

公开(公告)日：1988-04-21

申请号：PCT/DE1987000469

申请日：1987-10-20

Applicant: ELSBETT, Ludwig ,  ELSBETT, Günter ,  ELSBETT, Klaus

IPC: F02F03/26

CPC classification number: F02B23/0675 ,  F02B3/06 ,  F02B23/066 ,  F02B2275/14 ,  F02F2001/247 ,  Y02T10/123 ,  Y02T10/125

Abstract: In a piston comprising a trough-shaped combustion chamber of axially symmetric design, it is proposed to provide a recess in said chamber in the floor of the piston. In view of its depth and width, this recess has an influence on the aerodynamic speed of the gases entering and leaving the combustion chamber via the edge of the trough. In this way, heat-induced cracks are avoided at the level of said edge. The widths of the recess is limited in relation to the piston floor by the fact that no tilting moment has to be introduced into the valve shafts, and the widths of the recess is thus fixed in relation to the position and size of the valve heads.

Abstract translation: 在包括轴向对称设计的槽形燃烧室的活塞中，建议在活塞底板的所述室中设置凹部。 考虑到其深度和宽度，该凹槽对通过槽的边缘进入和离开燃烧室的气体的空气动力学速度具有影响。 以这种方式，在所述边缘的水平处避免了热引起的裂纹。 凹槽的宽度相对于活塞底板受到限制，因为不必将倾斜力矩引入到阀轴中，并且因此凹部的宽度相对于阀头的位置和尺寸是固定的。

公开(公告)号：WO1985001318A1

公开(公告)日：1985-03-28

申请号：PCT/US1983001735

申请日：1983-11-07

Applicant: CATERPILLAR TRACTOR CO.

Inventor： CATERPILLAR TRACTOR CO. ,  BAILEY, John, M. ,  LINDENFELSER, Dale, L.

IPC: F02F03/26

CPC classification number: F02B19/1004 ,  F02B3/06 ,  F02F3/24 ,  F02F3/285 ,  F05C2201/021 ,  Y02T10/125

Abstract: Heat plugs made of durable, heat resistant material are useful for protecting aluminium pistons from the jet flame of burning fuel emitted from the precombustion chamber of some compression ignition engines. However, when slower burning fuel such as vegetable oil is burned, unburned fuel is sometimes deflected by the heat plug against the adjacent cylinder bore where it dilutes the lubricating oil and causes high wear to that portion of the bore and to the piston rings. The subject heat plug (26) is provided with a barrier (37) which prevents unburned fuel from being deflected against a portion of the cylinder bore (12) nearest the heat plug. Thus, that unburned fuel remains in the burning gaseous mixture in the combustion chamber and is burned during the combustion process within the combustion chamber.

公开(公告)号：WO1998036164A1

公开(公告)日：1998-08-20

申请号：PCT/DE1997003001

申请日：1997-12-23

Applicant: MAHLE GMBH ,  JACOBI, Detlef

Inventor： MAHLE GMBH

IPC: F02F03/26

CPC classification number: F02B23/06 ,  F02B3/06 ,  F02B23/0621 ,  F02B2275/14 ,  Y02T10/125

Abstract: The invention relates to a plunger for internal combustion engines, having a combustion cavity (2) and at least one valve niche (3) in the plunger head. The combustion cavity (2) is cut by at least one valve niche (3). The invention seeks to reduce the risk of superficial cracking during transition U between the valve niche edge and the cavity. To this end, the edge of the transition U between the valve niche (3) and the cavity is situated in a comparatively low tension area separated from the actual valve niche (3) by an extension area (B) of the valve niche (3) running along the cavity edge.

Abstract translation: 在用于与燃烧碗（2）在活塞顶和至少一个阀龛内燃机的柱塞（3）在活塞头，其中，一个或多个阀龛（3）交叉的燃烧杯（2）中，划线风险在阀凹部边缘的接合处U给在槽 降低。 为了这个目的，边缘侧合流的阀凹部（3）插入所述腔的ü通过沿着在相对低应力的阀凹部（3）的槽边缘延伸部区域（B）延伸的通道，从实际的阀龛（3）遥远区域铺设。

公开(公告)号：WO1991010825A1

公开(公告)日：1991-07-25

申请号：PCT/HU1991000003

申请日：1991-01-18

Applicant: WILHEIM, László

IPC: F02F03/26

CPC classification number: F02B21/02 ,  F02B3/06 ,  F02B23/0603 ,  F02B23/0624 ,  F02B23/0636 ,  F02F3/285 ,  F05C2201/0448 ,  Y02T10/125

Abstract: The invention relates to a piston with swirl-inducing device for Diesel engines, where a recess is machined in the upper part of the piston which is in communication with the engine's main combustion chamber when the piston is built-in. The essence of the invention lies in that said swirl-inducing device (4) comprises a heat storage insert (5) fixed in the piston's (1) recess (3) axially spaced from a bottom plate (6) of the recess (3) by way of a reduced heat transfer connection and provided with a series of gas turbulence inducing ducts (12) through which a space (14) of the recess (3) created by said axial spacing (7) below the heat storage insert (5) is in communication with a space, e.g. the main combustion chamber (13) above the heat storage insert (5).

Abstract translation: 本发明涉及一种具有用于柴油发动机的涡流诱导装置的活塞，其中当活塞内置时在活塞的上部加工有凹口，该活塞与发动机的主燃烧室连通。 本发明的精髓在于，所述旋流引导装置（4）包括固定在活塞（1）凹部（3）中的与轴向间隔开的凹槽（3）的底板（6）上的储热插入件（5） 通过减小的传热连接并设置有一系列气体湍流诱导管道（12），通过该热交换器（5）下方的所述轴向间隔（7）产生的凹部（3）的空间（14） 与空间通信，例如 该主燃烧室（13）在储热插入件（5）的上方。

公开(公告)号：WO1998027329A1

公开(公告)日：1998-06-25

申请号：PCT/GB1997002567

申请日：1997-09-19

Applicant: PERKINS LIMITED ,  PARSI, Mohammed

Inventor： PERKINS LIMITED

IPC: F02F03/26

CPC classification number: F02B23/0693 ,  F02B3/06 ,  F02B23/06 ,  F02B23/0621 ,  F02B23/0636 ,  F02B23/0672 ,  F02B2275/14 ,  F02F3/26 ,  Y02T10/125

Abstract: A piston (10) for an internal combustion engine has a re-entrant type combustion bowl (13). The combustion bowl (13) comprises two re-entrant volumes (16, 17) in fluid communication and cascaded with respect to the longitudinal axias of the piston. The cascaded re-entrant volumes (16, 17) enhance gas velocities within the combustion bowl to improve fuel combustion.

Abstract translation: 用于内燃机的活塞（10）具有入口式燃烧碗（13）。 燃烧碗（13）包括流体连通并相对于活塞的纵向轴线级联的两个入口体积（16,17）。 级联的入口体积（16,17）增强燃烧碗内的气体速度，以改善燃料燃烧。

公开(公告)号：WO1994015088A1

公开(公告)日：1994-07-07

申请号：PCT/BR1993000041

申请日：1993-10-29

Applicant: METAL LEVE S/A. INDUSTRIA E COMÉRCIO ,  DAXER, Georg ,  LEITES, José, Manoel, Martins

Inventor： METAL LEVE S/A. INDUSTRIA E COMÉRCIO

IPC: F02F03/26

CPC classification number: F02B23/0603 ,  F02B23/0696 ,  F02F3/045 ,  F05C2201/021 ,  F05C2253/16 ,  Y02T10/125

Abstract: Piston with a reinforcing insert, presenting a top face (11) with a recessed combustion chamber (12) provided with a lateral peripheral wall, defined by the annular insert (20), which presents an internal end face (24) with a radial extension (d1) that is substantially smaller than the radial extension (d2) of the opposite external end face (22) of said annular insert (20), the radial thickness of the insert (20) varying along the profile of its external peripheral face (23), in order to maintain a value necessary to meet the requirements of structural reinforcement of the piston (10), at the region where the insert (20) is applied.

Abstract translation: 具有加强插入件的活塞具有设置有由所述环形插入件（20）限定的侧壁周边壁的凹入式燃烧室（12）的顶面（11），所述侧壁周边壁具有径向延伸部 （d1），其基本上小于所述环形插入件（20）的相对的外端面（22）的径向延伸部（d2），所述插入件（20）的径向厚度沿着其外周面 23），以便在应用插入件（20）的区域处保持满足活塞（10）的结构加强要求所必需的值。