Monolithic, galleryless piston and method of construction thereof

    公开(公告)号:US09869268B2

    公开(公告)日:2018-01-16

    申请号:US14535839

    申请日:2014-11-07

    摘要: A galleryless piston for an internal combustion engine and method of construction thereof are provided. The piston has a monolithic piston body extending along a central longitudinal axis. The piston body has an upper wall forming an upper combustion surface with first and second portions, with the first portion extending annularly along an outer periphery of the upper wall and the second portion forming a combustion bowl. The upper wall has an undercrown surface on an underside of the combustion bowl directly opposite the second portion of the upper combustion surface. The undercrown surface has an openly exposed 2-dimensional surface area, as viewed looking along the central longitudinal axis, between about 35-60 percent of an area defined by a maximum outer diameter of the piston body, thereby providing an expansive area against which oil being splashed or sprayed can freely contact to cool the piston.

    Double welded steel piston with full skirt

    公开(公告)号:US09702317B2

    公开(公告)日:2017-07-11

    申请号:US14471069

    申请日:2014-08-28

    发明人: Michael Weinenger

    IPC分类号: F02F3/16 F02F3/00 F02F3/22

    摘要: A three section steel piston for two-stroke engines is provided. The piston is provided with an upper section, a middle section and a lower section. Piston ring grooves are formed into the upper and lower sections, and pin bosses with openings and skirts are formed into the middle section. The middle section has relatively thinner walls as compared to the portions of the upper and lower sections at the piston ring grooves to reduce the mass of the piston. A closed cooling gallery may be formed adjacent an upper combustion surface of the piston with the cooling gallery being defined at least partially by the upper section.

    TWO-CYCLE ENGINE
    45.
    发明申请
    TWO-CYCLE ENGINE 审中-公开
    双循环发动机

    公开(公告)号:US20160258384A1

    公开(公告)日:2016-09-08

    申请号:US15055865

    申请日:2016-02-29

    发明人: Terutaka YASUDA

    摘要: A peripheral wall portion of a piston is provided with a through hole penetrating through the peripheral wall portion. A cylinder is provided with a scavenging passage having a first opening being open in a bore surface and configured to make a bore section and a crank chamber communicate with each other and is provided with a communication passage having a second opening being open in the bore surface on the other side with respect to the first opening and configured to make the bore section and the scavenging passage communicate with each other. The cylinder and piston are configured so that the through hole overlaps the second opening to communicate with the communication passage in a partial interval of a scavenging stroke in which the first opening becomes open in the bore surface on one side of the piston with reciprocal motion of the piston.

    摘要翻译: 活塞的周壁部分设有穿过周壁部分的通孔。 圆筒设置有扫气通道,其具有在孔表面中开口的第一开口,并且构造成使孔部分和曲柄室彼此连通并且设置有连通通道,该连通通道具有在孔表面中开口的第二开口 在另一侧相对于第一开口,并且构造成使孔部分和扫气通道彼此连通。 气缸和活塞被构造成使得通孔与第二开口重叠,以与连通通道连通的部分间隔的清扫行程,其中第一开口在活塞的一侧的孔表面中打开,往复运动 活塞。

    PISTON FOR AN INTERNAL COMBUSTION ENGINE
    46.
    发明申请
    PISTON FOR AN INTERNAL COMBUSTION ENGINE 有权
    内燃机活塞

    公开(公告)号:US20160115901A1

    公开(公告)日:2016-04-28

    申请号:US14894902

    申请日:2014-05-28

    IPC分类号: F02F3/22

    摘要: A piston for an internal combustion engine may include a piston head and a piston skirt. The piston head may include a piston crown, an encircling fire land, an encircling ring belt having a plurality of ring grooves and an encircling cooling duct disposed radially inwards from the ring belt. The cooling duct may be open in an axial direction away from the fire land and may be at least partially closed via a closure element. The cooling duct may have a cooling duct base and a cooling duct ceiling. The closure element may be arranged on the piston head to define the cooling duct base in a position above a lowermost ring groove of the plurality of ring grooves.

    摘要翻译: 用于内燃机的活塞可以包括活塞头和活塞裙。 活塞头可以包括活塞冠,环绕的火地,具有多个环形槽的环绕环带和从环带径向向内设置的环绕冷却管道。 冷却管道可以在远离火场的轴向方向上敞开,并且可以经由封闭元件至少部分地封闭。 冷却管道可具有冷却管道底座和冷却管道顶部。 闭合元件可以布置在活塞头上,以将冷却管道基部限定在多个环形槽的最下环槽的上方。

    Reduced compression height piston and piston assembly therewith and methods of construction thereof
    47.
    发明授权
    Reduced compression height piston and piston assembly therewith and methods of construction thereof 有权
    降低压缩高度的活塞和活塞组件及其构造方法

    公开(公告)号:US09127618B2

    公开(公告)日:2015-09-08

    申请号:US14040259

    申请日:2013-09-27

    摘要: A piston assembly and method of construction thereof for an internal combustion engine are provided. The assembly includes a piston head having an upper combustion wall with an undercrown surface and a ring belt region. The piston head has a floor with an upper surface and a bottom surface. The floor is spaced beneath the upper combustion wall in radial alignment with the ring belt region. A substantially enclosed, annular cooling gallery is bounded by the undercrown surface and the floor. A pair of pin bores depends directly from the floor of the cooling gallery. The assembly further includes a pin having ends configured for oscillating receipt in the pin bores. A pin bearing surface extends within the pin bores and between the pin bores in the lower surface of the floor. The assembly includes a connecting rod with an end fixed to the pin for conjoint oscillation therewith.

    摘要翻译: 提供一种用于内燃机的活塞组件及其构造方法。 该组件包括具有具有下凸表面和环带区域的上燃烧壁的活塞头。 活塞头具有具有上表面和底表面的底板。 地板在上燃烧壁下方与环带区域径向对准。 一个基本封闭的环形冷却廊由底下的表面和地板界定。 一对销孔直接从冷却库的地板上取下。 组件还包括具有构造成用于在销孔中摆动收据的端部的销。 销轴承表面在销孔内部延伸并且在底板的下表面中的销孔之间延伸。 该组件包括连接杆,其端部固定到销上以与其一起振动。

    DOUBLE WELDED STEEL PISTON WITH FULL SKIRT
    48.
    发明申请
    DOUBLE WELDED STEEL PISTON WITH FULL SKIRT 有权
    双面焊接钢丝杆,全长

    公开(公告)号:US20150059682A1

    公开(公告)日:2015-03-05

    申请号:US14471069

    申请日:2014-08-28

    发明人: Michael Weinenger

    IPC分类号: F02F3/16 F02F3/00

    摘要: A three section steel piston for two-stroke engines is provided. The piston is provided with an upper section, a middle section and a lower section. Piston ring grooves are formed into the upper and lower sections, and pin bosses with openings and skirts are formed into the middle section. The middle section has relatively thinner walls as compared to the portions of the upper and lower sections at the piston ring grooves to reduce the mass of the piston. A closed cooling gallery may be formed adjacent an upper combustion surface of the piston with the cooling gallery being defined at least partially by the upper section.

    摘要翻译: 提供了一种用于二冲程发动机的三段钢活塞。 活塞设有上部,中部和下部。 活塞环槽形成在上部和下部,并且具有开口和裙部的销凸起形成中间部分。 与活塞环槽的上部和下部的部分相比,中部具有相对较薄的壁,以减小活塞的质量。 可以在活塞的上部燃烧表面附近形成封闭的冷却库,其中冷却库至少部分地由上部限定。

    PISTON FOR AN INTERNAL COMBUSTION ENGINE
    49.
    发明申请
    PISTON FOR AN INTERNAL COMBUSTION ENGINE 有权
    内燃机活塞

    公开(公告)号:US20140352647A1

    公开(公告)日:2014-12-04

    申请号:US14360404

    申请日:2012-11-26

    发明人: Timo Linke

    IPC分类号: F02F3/16

    摘要: The invention relates to a piston (10, 110) for an internal combustion engine. Said piston comprises a piston head (11), a piston skirt (12) and a peripheral recess (24) between the piston head (11) and the piston skirt (12), an annular peripheral cooling channel (17), which is open towards the bottom and which is closed by a closing element (18), being provided in the piston head (11), and the piston skirt (12) having fillets (21) which are connected to the bottom of the piston skirt (11) and interconnected via bearing surfaces (23, 123). According to the invention, at least one projection (26, 126) is formed in the region of a free end face (25, 125) of the bearing surfaces (23, 123) and extends radially into a region of the cooling channel (17), said projection matching an opening (19) in the closing element (18) of the cooling channel (17).

    摘要翻译: 本发明涉及一种用于内燃机的活塞(10,110)。 所述活塞在活塞头(11)和活塞裙(12)之间包括活塞头(11),活塞裙(12)和周边凹部(24),环形周边冷却通道(17) 朝向底部并且由闭合元件(18)封闭,设置在活塞头部(11)中,并且活塞裙部(12)具有连接到活塞裙部(11)底部的圆角(21) 并通过支承表面(23,123)相互连接。 根据本发明,至少一个突起(26,126)形成在支承表面(23,123)的自由端面(25,125)的区域中,并且径向延伸到冷却通道(17)的区域 ),所述突起与冷却通道(17)的关闭元件(18)中的开口(19)相匹配。

    TWO-PART STEEL PISTON FOR INTERNAL COMBUSTION ENGINES
    50.
    发明申请
    TWO-PART STEEL PISTON FOR INTERNAL COMBUSTION ENGINES 有权
    用于内燃机的两部分钢活塞

    公开(公告)号:US20140305401A1

    公开(公告)日:2014-10-16

    申请号:US14348330

    申请日:2012-09-14

    IPC分类号: F02F3/16

    摘要: A method for producing a piston for an internal combustion engine, which piston has at least one cooling channel and is produced from at least one upper part and one lower part. The cooling channel of the piston is formed of the upper part and the lower part where the upper part and the lower part of the piston are each produced by means of a forging process At least one rib-like element, in particular, at least one rib, is additionally forged during the forging of the upper part an area of the cooling channel and/or at least one rib-like element, in particular, at least one rib, is additionally forged during the forging of the lower part in an area of the cooling channel. Two alternative production methods and to a piston for an internal combustion engine are disclosed.

    摘要翻译: 一种用于生产用于内燃机的活塞的方法,该活塞具有至少一个冷却通道并且由至少一个上部和一个下部产生。 活塞的冷却通道由上部和下部形成,其中活塞的上部和下部各自通过锻造工艺生产。至少一个肋状元件,特别是至少一个 在锻造上部部分期间另外锻造冷却通道的区域和/或至少一个肋状元件,特别是至少一个肋,在锻造下部的区域中另外锻造 的冷却通道。 公开了两种替代的生产方法和用于内燃机的活塞。