CN106640337A - 车用发动机倒滚流比燃烧系统 - Google Patents

车用发动机倒滚流比燃烧系统 Download PDF

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Publication number
CN106640337A
CN106640337A CN201611167718.5A CN201611167718A CN106640337A CN 106640337 A CN106640337 A CN 106640337A CN 201611167718 A CN201611167718 A CN 201611167718A CN 106640337 A CN106640337 A CN 106640337A
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tumble
exhaust
cylinder
combustion system
inlet valve
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CN201611167718.5A
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沈凯
张振东
王小燕
袁贤良
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Priority to CN201611167718.5A priority Critical patent/CN106640337A/zh
Publication of CN106640337A publication Critical patent/CN106640337A/zh
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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
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • 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
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/02—Modifying induction systems for imparting a rotation to the charge in the cylinder in engines having inlet valves arranged eccentrically to cylinder axis
    • 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
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B2023/106—Tumble flow, i.e. the axis of rotation of the main charge flow motion is horizontal
    • F02B2023/107—Reverse tumble flow, e.g. having substantially vertical intake ports
    • 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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

本发明涉及一种车用发动机倒滚流比燃烧系统，包括燃烧室顶、气缸壁、排气门、凹坑活塞、排气侧喷油器、进气门座圈、立式进气道所述燃烧室顶上设有排气门、排气侧喷油器、不对称进气门杆及不对称进气门，所述立式气道的中心线与进气门座圈中心线夹角为15°~25°，新鲜空气通过立式进气道进入，在不对称进气门的作用下，更多的气体将流向右侧，撞击凹坑活塞反射后，经气缸壁和燃烧室顶的引导，在缸内形成强烈的顺时针旋转滚流，用于改善排气侧的流动，减小爆震趋势，并加速燃烧。本发明能够有效减少缸内侧置直喷汽油机的爆震，并提升缸内滚流强度，加速燃烧。

Description

车用发动机倒滚流比燃烧系统
技术领域
本发明涉及一种车用发动机燃烧系统，尤其是一种车用发动机倒滚流比燃烧控制系统。
背景技术
车用汽油发动机缸内直喷技术能够有效提升发动机的升功率，降低整车油耗和排放，是车用发动机领域内常用的一种燃烧控制技术。由于采用燃料缸内直接喷射后，汽油与空气混合的时间大为缩短，所以需要组织有规律的缸内气流运动，确保在点火时刻缸内油气混合的均匀和理想分布。开发合理的缸内气流运动组织模式以提升侧置直喷发动机的燃效，并降低排放一直是车用缸内直喷汽油机发动机领域内追求的目标。
如图1，2，3所示，传统侧置直喷汽油机的燃烧系统，包括燃烧室顶1.，火花塞2.，气缸中心线3.，喷油器4.，进气门杆5.，对称进气门6.，缸盖底面7.，气缸壁8.，活塞9.，逆时针滚流10.，排气门11.，排气门杆12、进气道壁面18、进气门座圈22，传统缸内侧置直喷汽油机采用对称进气门6、进气道中心线19与进气门座圈中心线20夹角21为35°~55°的气门结果布置，匹配喷油器进气侧喷射和“屋脊型”燃烧室顶面，在燃烧室内形成逆时针旋转的有组织滚流流动，加速喷射燃料和空气的混合过程，同时活塞凹坑对油束形成包络，减少油束与气缸壁面接触所造成的润滑油稀释问题，有组织的逆时针滚流可以保持到压缩行程后期，在点火时刻破碎转化成湍动能加速燃烧；然而此种组织逆时针旋转的燃烧系统容易在排气侧行程流动死区，造成油气的富集进而导致爆震的发生，限制了缸内直喷发动机的强化潜力。
发明内容
鉴于上述状况，本发明提出一种车用发动机倒滚流比燃烧系统，在改善排气侧爆震的同时提升缸内滚流强度。
为实现上述目的，本发明的技术方案是：一种车用发动机倒滚流比燃烧系统，包括燃烧室顶、气缸壁、排气门、凹坑活塞、排气侧喷油器、进气门座圈、立式进气道所述燃烧室顶上设有排气门、排气侧喷油器、不对称进气门杆及不对称进气门，所述立式气道的中心线与进气门座圈中心线夹角为15°~25°，新鲜空气通过立式进气道进入，在不对称进气门的作用下，更多的气体将流向右侧，撞击凹坑活塞反射后，经气缸壁和燃烧室顶的引导，在缸内形成强烈的顺时针旋转滚流，用于改善排气侧的流动，减小爆震趋势，并加速燃烧。
所述排气侧喷油器喷射油束通过排气门的加热将快速蒸发并与空气混合。
本发明的有益效果是，本发明车用发动机倒滚流比燃烧系统，立式气道中心线与进气门座圈中心线夹角为15°~25°，有利于使用气体的重力，并配合不对称气门，让更多的进气以更快的速度从气门右侧流入气缸，借助活塞的反射，在缸内形成更强的顺时针滚流以利于快速燃烧；安装在排气侧的喷油器的喷射油束将被凹坑活塞包络，排气侧的较高温度有利于燃油的快速蒸发形成更为均匀的混合气；且顺时针滚流加速排气侧的火焰传播速度，减小爆震倾向。
因此，本发明能够有效减少缸内侧置直喷汽油机的爆震，并提升缸内滚流强度，加速燃烧。
附图说明
图1为传统侧置直喷汽油机的燃烧系统布置图；
图2为传统侧置直喷汽油机的燃烧系统气门及气道示意图；
图3为传统侧置直喷汽油机的燃烧系统的对称进气门纵剖面图；
图4为本发明的车用发动机倒滚流比燃烧系统布置图；
图5为本发明的车用发动机倒滚流比燃烧系统的气门及气道示意图；
图6为本发明的车用发动机倒滚流比燃烧系统的不对称进气门纵剖面图。
具体实施方式
下面结合附图与实施例对本发明作进一步说明。
如图4，5，6所示，一种车用发动机倒滚流比燃烧系统，包括燃烧室顶1、气缸壁8、排气门11、排气门杆12、不对称进气门杆13、不对称进气门14、排气侧喷油器15、凹坑活塞16、进气门座圈22、立式进气道26。燃烧室顶1上设有排气门11、排气侧喷油器15、不对称进气门杆13及不对称进气门14，立式气道26的中心线与进气门座圈中心线夹角24为15°~25°，燃烧室顶1、火花塞2、气缸壁8、凹坑活塞16、排气侧喷油器15、进气门座圈22、排气门11、排气门杆12，形成组织顺时针旋转滚流的倒滚流比燃烧系统。
新鲜空气通过立式进气道26进入，由于不对称进气门14的作用，更多的气体将流向右侧，撞击凹坑活塞16反射后，经气缸壁8和燃烧室顶1的引导，在缸内形成强烈的顺时针旋转滚流17；排气侧喷油器15喷射油束由于排气门11的加热将快速蒸发并与空气混合；顺时针滚流17改善了排气侧的流动，减小了爆震趋势，并加速燃烧。

Claims (2)

1.一种车用发动机倒滚流比燃烧系统，包括燃烧室顶（1）、气缸壁（8）、排气门（11）、凹坑活塞（16）、排气侧喷油器（15）、进气门座圈（22）、立式进气道（26），其特征在于：所述燃烧室顶（1）上设有排气门（11）、排气侧喷油器（15）、不对称进气门杆13及不对称进气门14，所述立式气道（26）的中心线与进气门座圈中心线夹角（24）为15°~25°，新鲜空气通过立式进气道（26）进入，在不对称进气门（14）的作用下，更多的气体将流向右侧，撞击凹坑活塞（16）反射后，经气缸壁（8）和燃烧室顶（1）的引导，在缸内形成强烈的顺时针旋转滚流（17），用于改善排气侧的流动，减小爆震趋势，并加速燃烧。
2.根据权利要求1所述的车用发动机倒滚流比燃烧系统，其特征在于：所述排气侧喷油器（15）喷射油束通过排气门（11）的加热将快速蒸发并与空气混合。
CN201611167718.5A 2016-12-16 2016-12-16 车用发动机倒滚流比燃烧系统 Pending CN106640337A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550821A (zh) * 2021-06-30 2021-10-26 东风汽车集团股份有限公司 一种发动机以及车辆

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US4790272A (en) * 1987-10-15 1988-12-13 Woolenweber William E Non-circular poppet valves for internal combustion engine cylinder assemblies
DE19705659A1 (de) * 1997-02-14 1998-08-20 Guenter Dr Ing Slowik Verfahren zum Betreiben einer Brennkraftmaschine
JPH10331645A (ja) * 1997-06-03 1998-12-15 Nissan Motor Co Ltd 筒内噴射式内燃機関
US6138639A (en) * 1998-01-07 2000-10-31 Nissan Motor Co., Ltd. In-cylinder direct-injection spark-ignition engine
JP2003322022A (ja) * 2002-04-30 2003-11-14 Toyota Motor Corp 燃料噴射制御装置
US20100012081A1 (en) * 2006-07-20 2010-01-21 Toyota Jidosha Kabushiki Kaisha Control apparatus and control method for direct injection spark ignition internal combustion engine
CN103696847A (zh) * 2012-09-28 2014-04-02 重庆长安汽车股份有限公司 一种缸内直喷发动机燃烧室
CN105829691A (zh) * 2013-12-17 2016-08-03 丰田自动车株式会社 火花点火式内燃机的控制系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790272A (en) * 1987-10-15 1988-12-13 Woolenweber William E Non-circular poppet valves for internal combustion engine cylinder assemblies
DE19705659A1 (de) * 1997-02-14 1998-08-20 Guenter Dr Ing Slowik Verfahren zum Betreiben einer Brennkraftmaschine
JPH10331645A (ja) * 1997-06-03 1998-12-15 Nissan Motor Co Ltd 筒内噴射式内燃機関
US6138639A (en) * 1998-01-07 2000-10-31 Nissan Motor Co., Ltd. In-cylinder direct-injection spark-ignition engine
JP2003322022A (ja) * 2002-04-30 2003-11-14 Toyota Motor Corp 燃料噴射制御装置
US20100012081A1 (en) * 2006-07-20 2010-01-21 Toyota Jidosha Kabushiki Kaisha Control apparatus and control method for direct injection spark ignition internal combustion engine
CN103696847A (zh) * 2012-09-28 2014-04-02 重庆长安汽车股份有限公司 一种缸内直喷发动机燃烧室
CN105829691A (zh) * 2013-12-17 2016-08-03 丰田自动车株式会社 火花点火式内燃机的控制系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550821A (zh) * 2021-06-30 2021-10-26 东风汽车集团股份有限公司 一种发动机以及车辆

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