CN2091361U - 一种用于柴油机直喷燃烧室的喷油嘴 - Google Patents

一种用于柴油机直喷燃烧室的喷油嘴 Download PDF

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CN2091361U
CN2091361U CN 91211690 CN91211690U CN2091361U CN 2091361 U CN2091361 U CN 2091361U CN 91211690 CN91211690 CN 91211690 CN 91211690 U CN91211690 U CN 91211690U CN 2091361 U CN2091361 U CN 2091361U
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oil
needle
diesel engine
valve
pressure
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梁少平
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Abstract

一种用于柴油机直喷燃烧室的喷油嘴,由于在针 阀上开有丁字型油道,使油腔与压力室相通;针阀锥 面直接密封喷油孔;针阀落座后,压力室被密封;从而 使针阀开启速度提高,喷油压力稳定,使柴油雾化好, 能够完全燃烧,降低了燃油耗,燃烧室中无二次燃烧 使柴油机排出的废气中HC化合物含量降低。

Description

本实用新型属于内燃机喷油器领域。
现在用于柴油机直喷燃烧室的喷油嘴一般为针阀锥面不直接密封喷油孔,而喷油孔开在压力室上,由于当高压柴油开启针阀后,高压柴油首先要充满压力室,然后高压柴油才通过喷油孔喷入燃烧室,在这一过程中高压柴油由于添充压力室,使高压柴油压力降低,通过喷油孔喷出的柴油雾化不好,另外,当针阀完成喷  油落座后,由于压力室内还存有剩油,造成柴油机燃烧室内的二次燃烧,使柴油机燃油耗增加,排放的废气中HC化合物增加。
本实用新型的目的是提供一种;高压柴油开启针阀时,喷油压力不变,能提高针阀开启速度,由针阀体锥面直接密封喷油孔,当针阀落座后,压力室被密封,使柴油机的燃油耗降低,排放的废气中HC化合物减少的喷油嘴。
本实用新型是这样实现的;该喷油嘴由针阀3和针阀体4组成,针阀锥面6密封针阀体4上的喷油孔5;针阀锥面6下端有一环型台阶7;针阀上钻有相通的丁字型油道1、2,使油腔9与压力室8相通。使燃烧室内不存在二次燃烧,柴油机排出废气中的HC化合物减小。
本实用新型的优点是:针阀开启速度提高;在针阀开启前后,高压燃油压力保持不变,使喷出的柴油雾化好,燃烧完全,降低了柴油机的燃油耗;由于针阀落座后,压力室被密封,使燃烧室内不存在二次燃烧,柴油机排出废气中的HC化合物减小,
下面结合附图,用实施例对本实用新型做进一步说明:
附图中:1、2为丁字型油道,3,针阀,4,针阀体,5,喷油孔,6针阀锥面,7环型台阶,8压力室,9油腔。
当高压柴油开启针阀3时,由于高压柴油通过丁字型油道1、2已进入压力室8,使开启针阀3的合力增大,针阀开启速度提高;由于针阀3开启前后油腔9和压力室8中的高压燃油通过丁字型油道1、2相通,使高压柴油的喷射压力不变;由于针阀3落座后,压力室8被密封,柴油机燃烧室中不存在二次燃烧过程。
原有喷油嘴与本实用新型在6102柴油机上的试验结果为;采用原有的喷油嘴,燃油耗为;200g/kw·H,HC化合物的排放量为;1.73g/kw·H;采用本实用新型,燃油耗为;196~190g/kw·H,HC化合物的排放量为;0.81g/kw·H。

Claims (1)

1、一种用于柴油机直喷燃烧室的喷油嘴,由针阀3和针阀体4组成,其特征是:针阀锥面6密封针阀体4上的喷油孔5;针阀锥面6下端有一环型台阶7;针阀3上钻有相通的丁字型油道1、2,使油腔9与压力室8相通。
CN 91211690 1991-05-21 1991-05-21 一种用于柴油机直喷燃烧室的喷油嘴 Withdrawn CN2091361U (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 91211690 CN2091361U (zh) 1991-05-21 1991-05-21 一种用于柴油机直喷燃烧室的喷油嘴

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 91211690 CN2091361U (zh) 1991-05-21 1991-05-21 一种用于柴油机直喷燃烧室的喷油嘴

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CN2091361U true CN2091361U (zh) 1991-12-25

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CN 91211690 Withdrawn CN2091361U (zh) 1991-05-21 1991-05-21 一种用于柴油机直喷燃烧室的喷油嘴

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1323239C (zh) * 2005-02-07 2007-06-27 大连理工大学 喷油嘴
CN100480505C (zh) * 2003-09-19 2009-04-22 博世株式会社 用于内燃机的燃料喷射阀
CN104879256A (zh) * 2014-02-28 2015-09-02 株式会社电装 燃料喷射器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100480505C (zh) * 2003-09-19 2009-04-22 博世株式会社 用于内燃机的燃料喷射阀
CN1323239C (zh) * 2005-02-07 2007-06-27 大连理工大学 喷油嘴
CN104879256A (zh) * 2014-02-28 2015-09-02 株式会社电装 燃料喷射器
CN104879256B (zh) * 2014-02-28 2018-09-25 株式会社电装 燃料喷射器

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