CN104196664A - Conical surface sealed high pressure common rail fuel injector controller - Google Patents

Conical surface sealed high pressure common rail fuel injector controller Download PDF

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Publication number
CN104196664A
CN104196664A CN201410415500.1A CN201410415500A CN104196664A CN 104196664 A CN104196664 A CN 104196664A CN 201410415500 A CN201410415500 A CN 201410415500A CN 104196664 A CN104196664 A CN 104196664A
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China
Prior art keywords
spool
oil
lining
electromagnet
hole
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CN201410415500.1A
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Chinese (zh)
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CN104196664B (en
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李汝宁
高怡
孙勇
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China North Engine Research Institute Tianjin
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China North Engine Research Institute Tianjin
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Abstract

The invention relates to a conical surface sealed high pressure common rail fuel injector controller. A low pressure oil cavity (17) and an oil return groove (25) are formed in the bottom of a large hole of a stepped hole in a fuel injector body (16) in the circumferential direction, a main oil duct (13) is communicated with a control cavity oil inlet hole (15) through an oil inlet (14), an adjusting screw (1) is arranged on the upper portion of a through hole of a valve element bush (3), the adjusting screw (1) is connected with the valve element bush (3) through an electromagnetic valve nut (2), one end of the adjusting screw (1) is connected with an electromagnet spring seat (6), an adjusting cushion block (18) is arranged at the lower end of an electromagnet (5), a bush (8) is arranged in a small hole of the stepped hole, a hole plate (9) located above the control cavity oil inlet hole (15) is connected with the lower end of the bush (8), and a control plunger (12) and the hole plate (9) are connected through a control cavity return spring (11). The conical surface sealed high pressure common rail fuel injector controller is small in leakage, the oil supply efficiency of a high pressure common rail oil supply system is improved, and the flexibility of the system is enhanced.

Description

A kind of conical surface sealed high pressure common rail injector control volume
Technical field
The invention belongs to engine fuel injection system technical field, be specifically related to a kind of conical surface sealed high pressure common rail injector control volume.
Background technique
For reaching the emission regulation demands of motor and improving Economy and handling, require more and more higher to the flexibility of fuel injection system spray characteristic, object is that the each operating point of motor can be realized efficient burning and clean discharge, require the oil-fired system of coupling can be with set fuel injection characteristic to injected fuel at regular time and quantity in cylinder, and fully after atomization, well mix with cylinder compressed air.Fuel injection characteristic is the main research approach that improves combustion performance with mating of gas exchange process, again the emphasis of research with set fuel injection characteristic injected fuel but how to realize oil sprayer, meanwhile, in order to improve burning, and obtaining larger power, injection pressure constantly continues to increase.Raising injection pressure and flexibly control mode can guarantee that oil spout drop is more meticulous, to meet following Abgasgesetz.
When common-rail injector injection process, leak and occur in by high-pressure section ramp metering chamber and during flowing into low-pressure section subsequently, be referred to as to switch and leak, this control is leaked because of its idle use, thus be useless leakage, and caused the increase of oil feed pump power.Under high injection pressure, the static leakage of high pressure common rail injector and switching leakage part increase to some extent, and cause temperature in oil sprayer to raise.In oil sprayer, temperature raises and has reduced fuel oil viscosity, makes to reveal more to worsen.So farthest reduce to leak, improving high-pressure common rail oil supply system fuel feeding efficiency is also the emphasis of research.
Summary of the invention
The present invention is exactly in order to solve conventional high pressure common rail injector spill port plane sealing static leakage seriously and the large problem of control chamber switching leakage, and has proposed a kind of conical surface sealed high pressure common rail injector control volume.The present invention is leaked little, has improved high-pressure common rail oil supply system fuel feeding efficiency, has strengthened system flexibility.
The technical solution used in the present invention: a kind of conical surface sealed high pressure common rail injector control volume, it comprises adjusts screw 1, solenoid valve nut 2, spool lining 3, packing ring 4, electromagnet 5, electromagnet spring seat 6, armature 7, lining 8, orifice plate 9, control chamber return spring 11, control plunger 12, oil injector body 16, adjust cushion block 18, spool 19, the one O type circle 20, the 2nd O type circle 21, electromagnet spring 22, the 3rd O type circle 23, is provided with shoulder hole vertically in oil injector body 16, the macropore bottom of oil injector body 16 interior described shoulder holes is provided with low pressure oil pocket 17 and oil-return groove 25 along circumference, and oil injector body 16 bottoms are provided with main oil gallery 13, filler opening 14, control chamber oil inlet hole 15, main oil gallery 13 is communicated with control chamber oil inlet hole 15 by filler opening 14, electromagnet 5 is installed in the macropore of oil injector body 16 interior described shoulder holes, the hollow lumen of electromagnet 5 is equiped with spool lining 3, packing ring 4 is arranged between the cylindrical bulge loop of spool lining 3 and the upper-end surface of electromagnet 5, the through hole top of spool lining 3 is provided with adjusts screw 1, adjusting screw 1 is connected with spool lining 3 by solenoid valve nut 2, spool 19 is arranged in spool lining 3, one end electromagnet spring seat 6 fixing with spool 19 upper ends that is positioned at the adjustment screw 1 of spool lining 3 inside is connected, adjust cushion block 18 and be arranged on electromagnet 5 lower ends, armature 7 is arranged on adjusts cushion block 18 inside, wherein, spool 19 is through the center hole of armature 7, lining 8 is arranged in the aperture of described shoulder hole, the spool cutting face 26 of spool 19 lower ends is inserted in the center hole of lining 8, the orifice plate 9 that is positioned at control chamber oil inlet hole 15 tops is connected with lining 8 lower ends, controlling plunger 12 is inserted in the aperture of described shoulder hole, be positioned at control chamber oil inlet hole 15 belows, control between plunger 12 and orifice plate 9 and be connected by control chamber return spring 11, wherein, control between plunger 12 and orifice plate 9 and be surrounded by control chamber 10, control chamber oil inlet hole 15 is communicated with control chamber 10.
Further, between electromagnet 5 and oil injector body 16, be provided with between an O type circle 20, spool lining 3 and electromagnet 5 and be provided with between the 2nd O type circle 21, adjustment screw 1 and spool lining 3 and be provided with the 3rd O type circle 23.
Further, between lining 8 and oil injector body 16, form sealing surface 24.
Further, the quantity of spool cutting face 26 is 3, is evenly arranged along spool 19 circumferencial directions.
Further, the quantity of oil-return groove 25 is 3~4, is evenly arranged along the macropore bottom circumferencial direction of described shoulder hole.
The present invention compared with prior art its beneficial effect is: the present invention is by the current switching of high-speed electromagnetic valve, the adhesive that realizes armature and solenoid valve with separate, and then form conical surface seal by spool and lining, realize closing and opening of control chamber oil outlet, can effectively realize the high pressure sealing of control chamber oil outlet by conical surface seal, reduce static leakage; Controlling in plunger motion process, can realize the circulation area of control chamber oil inlet hole simultaneously, reduce to switch and leaked, strengthen system flexibility, reduce high-pressure common-rail injection system power loss.
Brief description of the drawings
Fig. 1 is conical surface sealed high pressure common rail injector control volume structural representation;
Fig. 2 is lining longitudinal section schematic diagram;
Fig. 3 is that lining A is to schematic diagram;
Fig. 4 is valve core structure schematic diagram;
Fig. 5 is spool cross sectional representation;
Fig. 6 is oil injector body longitudinal section schematic diagram;
Fig. 7 is oil injector body plan view.
Embodiment
As shown in Figure 1, a kind of conical surface sealed high pressure common rail injector control volume, it comprises adjusts screw 1, solenoid valve nut 2, spool lining 3, packing ring 4, electromagnet 5, electromagnet spring seat 6, armature 7, lining 8, orifice plate 9, control chamber return spring 11, control plunger 12, oil injector body 16, adjust cushion block 18, spool 19, the one O type circle 20, the 2nd O type circle 21, electromagnet spring 22, the 3rd O type circle 23, is provided with shoulder hole vertically in oil injector body 16, the macropore bottom of oil injector body 16 interior described shoulder holes is provided with low pressure oil pocket 17 and oil-return groove 25 along circumference, and oil injector body 16 bottoms are provided with main oil gallery 13, filler opening 14, control chamber oil inlet hole 15, main oil gallery 13 is communicated with control chamber oil inlet hole 15 by filler opening 14, electromagnet 5 is installed in the macropore of oil injector body 16 interior described shoulder holes, the hollow lumen of electromagnet 5 is equiped with spool lining 3, packing ring 4 is arranged between the cylindrical bulge loop of spool lining 3 and the upper-end surface of electromagnet 5, the through hole top of spool lining 3 is provided with adjusts screw 1, adjusting screw 1 is connected with spool lining 3 by solenoid valve nut 2, spool 19 is arranged in spool lining 3, one end electromagnet spring seat 6 fixing with spool 19 upper ends that is positioned at the adjustment screw 1 of spool lining 3 inside is connected, adjust cushion block 18 and be arranged on electromagnet 5 lower ends, armature 7 is arranged on adjusts cushion block 18 inside, wherein, spool 19 is through the center hole of armature 7, lining 8 is arranged in the aperture of described shoulder hole, the spool cutting face 26 of spool 19 lower ends is inserted in the center hole of lining 8, the orifice plate 9 that is positioned at control chamber oil inlet hole 15 tops is connected with lining 8 lower ends, controlling plunger 12 is inserted in the aperture of described shoulder hole, be positioned at control chamber oil inlet hole 15 belows, control between plunger 12 and orifice plate 9 and be connected by control chamber return spring 11, wherein, control between plunger 12 and orifice plate 9 and be surrounded by control chamber 10, control chamber oil inlet hole 15 is communicated with control chamber 10.Between described electromagnet 5 and oil injector body 16, be provided with between an O type circle 20, spool lining 3 and electromagnet 5 and be provided with between the 2nd O type circle 21, adjustment screw 1 and spool lining 3 and be provided with the 3rd O type circle 23.Between described lining 8 and oil injector body 16, form sealing surface 24.The quantity of described spool cutting face 26 is 3, is evenly arranged along spool 19 circumferencial directions.The quantity of described oil-return groove 25 is 3~4, is evenly arranged along the macropore bottom circumferencial direction of described shoulder hole.
Working principle: the control of electromagnet 5 is disconnected and being controlled by electric current, electromagnetic force between armature 7 and electromagnet 5 disappears, spool 19 and armature 7 move downward under 22 effects of electromagnet spring, and then spool 19 separates with lining 8, control chamber 10 inner high voltage oil are by spool 19 and lining 8 gaps, enter low pressure oil pocket 17 through spool cutting face 26 along with control chamber inner high voltage oil enters low pressure oil pocket 17, control chamber internal pressure reduces, under the effect of pressure reduction, controlling plunger 12 moves upward, in movement process, control chamber oil inlet hole 15 circulation areas reduce, reduce to control chamber 10 oil-feeds, impel control chamber 10 internal pressure fast reducings, the control electric current of high-speed electromagnetic valve 5 is open-minded, armature 7 moves upward under electromagnetic force, and then spool 19 contacts with lining 8, form conical surface seal, thereby control chamber oil outlet is closed, control chamber internal pressure raises, control plunger 12 and move downward, control chamber oil inlet hole 15 is opened completely, and control chamber internal pressure raises fast, control plunger 12 and move downward fast, end of injection.

Claims (5)

1. a conical surface sealed high pressure common rail injector control volume, it comprises adjusts screw (1), solenoid valve nut (2), spool lining (3), packing ring (4), electromagnet (5), electromagnet spring seat (6), armature (7), lining (8), orifice plate (9), control chamber return spring (11), control plunger (12), oil injector body (16), adjust cushion block (18), spool (19), the one O type circle (20), the 2nd O type circle (21), electromagnet spring (22), the 3rd O type circle (23), it is characterized in that: oil injector body is provided with shoulder hole in (16) vertically, in oil injector body (16), the macropore of described shoulder hole bottom is provided with low pressure oil pocket (17) and oil-return groove (25) along circumference, oil injector body (16) bottom is provided with main oil gallery (13), filler opening (14), control chamber oil inlet hole (15), main oil gallery (13) is communicated with control chamber oil inlet hole (15) by filler opening (14), electromagnet (5) is installed in the macropore of described shoulder hole in oil injector body (16), the hollow lumen of electromagnet (5) is equiped with spool lining (3), packing ring (4) is arranged between the cylindrical bulge loop of spool lining (3) and the upper-end surface of electromagnet (5), the through hole top of spool lining (3) is provided with adjusts screw (1), adjusting screw (1) is connected with spool lining (3) by solenoid valve nut (2), spool (19) is arranged in spool lining (3), one end electromagnet spring seat (6) fixing with spool (19) upper end that is positioned at the inner adjustment screw (1) of spool lining (3) is connected, adjust cushion block (18) and be arranged on electromagnet (5) lower end, armature (7) is arranged on adjusts cushion block (18) inside, wherein, spool (19) is through the center hole of armature (7), lining (8) is arranged in the aperture of described shoulder hole, the spool cutting face (26) of spool (19) lower end is inserted in the center hole of lining (8), the orifice plate (9) that is positioned at control chamber oil inlet hole (15) top is connected with lining (8) lower end, controlling plunger (12) is inserted in the aperture of described shoulder hole, be positioned at control chamber oil inlet hole (15) below, control between plunger (12) and orifice plate (9) and be connected by control chamber return spring (11), wherein, control between plunger (12) and orifice plate (9) and be surrounded by control chamber (10), control chamber oil inlet hole (15) is communicated with control chamber (10).
2. a kind of conical surface sealed high pressure common rail injector control volume according to claim 1, is characterized in that: between electromagnet (5) and oil injector body (16), be provided with between an O type circle (20), spool lining (3) and electromagnet (5) and be provided with between the 2nd O type circle (21), adjustment screw (1) and spool lining (3) and be provided with the 3rd O type circle (23).
3. a kind of conical surface sealed high pressure common rail injector control volume according to claim 1, is characterized in that: between lining (8) and oil injector body (16), form sealing surface (24).
4. a kind of conical surface sealed high pressure common rail injector control volume according to claim 1, is characterized in that: the quantity of spool cutting face (26) is 3, is evenly arranged along spool (19) circumferencial direction.
5. according to the arbitrary described a kind of conical surface sealed high pressure common rail injector control volume of claim 1 to 4, it is characterized in that: the quantity of oil-return groove (25) is 3~4, be evenly arranged along the macropore bottom circumferencial direction of described shoulder hole.
CN201410415500.1A 2014-08-22 2014-08-22 A kind of conical surface sealed high pressure common rail injector control volume Active CN104196664B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105402068A (en) * 2015-11-04 2016-03-16 中国北方发动机研究所(天津) Double-coil type high-speed electromagnetic valve
CN106704067A (en) * 2017-01-25 2017-05-24 中国第汽车股份有限公司 Weak leakage oil return preventing fuel injection device
CN106894928A (en) * 2017-03-24 2017-06-27 中国北方发动机研究所(天津) A kind of non-hydraulic resistance balance valve fuel injector of Tape movement orifice plate
WO2021057018A1 (en) * 2019-09-26 2021-04-01 重庆红江机械有限责任公司 Electronic control common-rail-type heavy oil injector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101251067A (en) * 2008-03-21 2008-08-27 北京理工大学 Tappet rod type high pressure co-rail electric-controlled oil ejector
DE102008005523A1 (en) * 2008-01-23 2009-07-30 Robert Bosch Gmbh fuel injector
CN103644060A (en) * 2013-12-05 2014-03-19 中国第一汽车股份有限公司无锡油泵油嘴研究所 Control valve
CN203627055U (en) * 2013-12-30 2014-06-04 南岳电控(衡阳)工业技术有限公司 Oil sprayer capable of controlling sprayed fuel oil provided for engine in fixed time and quantity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005523A1 (en) * 2008-01-23 2009-07-30 Robert Bosch Gmbh fuel injector
CN101251067A (en) * 2008-03-21 2008-08-27 北京理工大学 Tappet rod type high pressure co-rail electric-controlled oil ejector
CN103644060A (en) * 2013-12-05 2014-03-19 中国第一汽车股份有限公司无锡油泵油嘴研究所 Control valve
CN203627055U (en) * 2013-12-30 2014-06-04 南岳电控(衡阳)工业技术有限公司 Oil sprayer capable of controlling sprayed fuel oil provided for engine in fixed time and quantity

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105402068A (en) * 2015-11-04 2016-03-16 中国北方发动机研究所(天津) Double-coil type high-speed electromagnetic valve
CN106704067A (en) * 2017-01-25 2017-05-24 中国第汽车股份有限公司 Weak leakage oil return preventing fuel injection device
CN106704067B (en) * 2017-01-25 2019-05-14 中国第一汽车股份有限公司 The weak anti-oil return fuel injection device of leakage
CN106894928A (en) * 2017-03-24 2017-06-27 中国北方发动机研究所(天津) A kind of non-hydraulic resistance balance valve fuel injector of Tape movement orifice plate
WO2021057018A1 (en) * 2019-09-26 2021-04-01 重庆红江机械有限责任公司 Electronic control common-rail-type heavy oil injector
GB2596882A (en) * 2019-09-26 2022-01-12 Chongqing hongjiang machinery co ltd Electronic control common-rail-type heavy oil injector

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