CN2441985Y - 柴油机活塞 - Google Patents

柴油机活塞 Download PDF

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CN2441985Y
CN2441985Y CN00230204U CN00230204U CN2441985Y CN 2441985 Y CN2441985 Y CN 2441985Y CN 00230204 U CN00230204 U CN 00230204U CN 00230204 U CN00230204 U CN 00230204U CN 2441985 Y CN2441985 Y CN 2441985Y
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piston
diesel engine
noise
utility
model
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阮瑞平
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

本实用新型涉及一种柴油机活塞,其特征是活塞的销孔偏置,使活塞压缩至极点时,减小曲柄与活塞中心线的夹角。此结构的活塞压缩至极点时,燃烧爆炸瞬间产生的推力几乎全部传递给曲柄,从而降低活塞冲击气缸壁产生的噪音。本实用新型结构具有设计合理,在不增加制造工艺和成本的情况下,有效地降低活塞工作的噪音,而且增加动力。

Description

柴油机活塞
本实用新型涉及一种柴油机活塞的改进。
内燃机的发明给生产和生活带来极大的便利，提供动力源，广泛用于交通运输、发电、水利灌溉等领域。内燃机可分成两大类，也即汽油内燃机和柴油内燃机，汽油内燃机发展快、性能优异，但其制造工艺要求高、运行成本高，故很难取代柴油内燃机的市场。而柴油内燃机即具有结构相对简单、运行成本低的特点，但运行时噪音大，制约了其应用领域，如何克服内燃机的噪音，特别是柴油内燃机的噪音已成为诸多机构研究的课题。内燃机的噪音源至少包括以下几方面：吸排气发出的声响、燃烧爆炸声及机械传动产生的噪音。要解决噪音，需综合考虑以上几方面的问题，而目前研究最多的是排气噪音，单方面解决了排气噪音，但另一噪音源又凸显出。现有柴油机活塞的销孔是设在活塞的中心线上，当活塞压缩到极点时，曲柄与活塞中心线成一较大夹角，燃烧爆炸时活塞的推动力才能将曲柄推动，但此时活塞也形成一对气缸壁的分力，这一分力使活塞运动时产生拍打气缸发出较大的噪音，而且还会引起气缸壁的高频自振。现有活塞结构如图1、图2所示，活塞1的中心线上开设有销孔2，而活塞1的燃烧室3成心型状。
本实用新型的目的是设计一种活塞销孔偏置的柴油机活塞。
本实用新型的任务是这样完成的：一种包括有烧燃室和销孔的柴油机活塞，其特征是活塞的销孔偏置，使活塞压缩至极点时，减小曲柄与活塞中心线的夹角。此结构的活塞压缩至极点时，燃烧爆炸瞬间产生的推力几乎全部传递给曲柄，从而降低活塞冲击气缸壁产生的噪音。
本实用新型结构具有设计合理，在不增加制造工艺和成本的情况下，有效地降低活塞工作冲击气缸发出的噪音，也减少气缸壁的高频自振，同时又增加动力。
下面结合具体图例对本实用新型做进一步说明：
图1现有活塞的结构示意图
图2为图1活塞端面图
图3本实用新型的结构示意图
图4为图3活塞端面图
参照图3及图4，一种包括有烧燃室3和销孔2的柴油机活塞，其结构特征是活塞1的销孔2偏置，也即偏离活塞的中心线，至使活塞压缩至极点时，保持曲柄与活塞中心线平行。活塞销孔2偏置中心线1.5mm。活塞1的燃烧室3偏置于活塞1的一侧，成类椭圆状，并在燃烧室靠活塞边沿处设有一喷油缺刻4，使喷油能均匀扩散至整个燃烧室3内。
本结构的活塞可适用于国标S195、S1100、S1102、S1110、S1115、S1125等型号的柴油内燃机上使用。

Claims (3)

1、一种包括有烧燃室和销孔的柴油机活塞，其特征是活塞的销孔偏置。
2、根据权利要求1所述的柴油机活塞，其特征是活塞销孔偏置中心线1.5mm。
3、根据权利要求1所述的柴油机活塞，其特征是活塞的燃烧室偏置于活塞的一侧，成类椭圆状，并在燃烧室靠活塞边沿处设有一喷油缺刻。
CN00230204U 2000-06-16 2000-06-16 柴油机活塞 Expired - Fee Related CN2441985Y (zh)

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CN00230204U CN2441985Y (zh) 2000-06-16 2000-06-16 柴油机活塞

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Application Number Priority Date Filing Date Title
CN00230204U CN2441985Y (zh) 2000-06-16 2000-06-16 柴油机活塞

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CN2441985Y true CN2441985Y (zh) 2001-08-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518272A (zh) * 2018-03-29 2018-09-11 天津中恒动力研究院有限公司 发动机总成

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108518272A (zh) * 2018-03-29 2018-09-11 天津中恒动力研究院有限公司 发动机总成

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