CN108397329A - High-power diesel engine current limiter - Google Patents
High-power diesel engine current limiter Download PDFInfo
- Publication number
- CN108397329A CN108397329A CN201810136135.9A CN201810136135A CN108397329A CN 108397329 A CN108397329 A CN 108397329A CN 201810136135 A CN201810136135 A CN 201810136135A CN 108397329 A CN108397329 A CN 108397329A
- Authority
- CN
- China
- Prior art keywords
- current limiter
- oil duct
- stopper
- current
- current limliting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/001—Fuel-injection apparatus having injection valves held closed mechanically, e.g. by springs, and opened by a cyclically-operated mechanism for a time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to common rail system technical fields, it is related to a kind of high-power diesel engine current limiter, including current limliting body, the current limliting device cavity sliding setting current limiter inner core, current limiter inner core top core is arranged Flow restrictor springs, the Flow restrictor springs upper end is held out against in current limliting device cavity upper end step face, Flow restrictor springs lower end is pressed on current limiter core surface step surface, current limliting device cavity gap is installed by yoke seam but without, current limiter inner core lower end is supported in yoke seam but without, the current limliting body upper edge is axially arranged with low pressure oil duct, low pressure oil duct upper end extends to current limliting body top surface, low pressure oil duct lower end extends at current limliting body cavity of resorption.The current limiter can effectively solve leakage problems, avoid low pressure oil from leaking into external environment, while current limiter closes flow and is easy to change, while also solving yoke seam but without desoldering problem.
Description
Technical field
The invention belongs to common rail system technical fields, are related to a kind of high-power diesel engine current limiter.
Background technology
Existing occluder configurations close flow if you need to change current limiter, need to redesign current limiter inner core；Existing current limiter
Block is tightened using screw thread and laser welding structure；Current limiter is to fuel oil leakage extremely without any safeguard procedures.Existing current limiter
The shortcomings that：Change current limiter flow, which need to redesign, processes current limiter inner core, high processing costs, and the period is long；Yoke seam but without is adopted
It is tightened with screw thread and laser welding structure has thread looseness and desoldering failure；Current limiter arranges fuel oil leakage extremely without any protection
It applies, current limiter sealing performance is required very stringent.
Invention content
In view of the above-mentioned problems, providing a kind of high-power diesel engine current limiter, which can effectively solve the present invention
Leakage problems avoid low pressure oil from leaking into external environment, while current limiter closes flow and is easy to change, while also solving current limliting
Device block desoldering problem.
Technical solution according to the invention：A kind of high-power diesel engine current limiter, it is characterised in that：Including current limiter
Body, the current limliting device cavity sliding setting current limiter inner core, current limiter inner core top core are arranged Flow restrictor springs, the limit
Stream device spring upper end is held out against in current limliting device cavity upper end step face, and Flow restrictor springs lower end is pressed in current limiter core surface platform
On terrace, yoke seam but without is installed in current limliting device cavity gap, and current limiter inner core lower end is supported in yoke seam but without, the limit
Stream body upper edge is axially arranged with low pressure oil duct, and low pressure oil duct upper end extends to current limliting body top surface, and low pressure oil duct lower end extends to
At current limliting body cavity of resorption.
As a further improvement on the present invention, the low pressure oil duct includes top oil duct and lower part oil duct connected in sequence,
Top oil duct is vertical oil duct, and the upper end of lower part oil duct is connected to top oil duct lower end, and the lower end of lower part oil duct extends to current limliting
At the cavity outer ring of body.
As a further improvement on the present invention, the yoke seam but without include can axially opposed movement upper stopper, under
Block, the barrel of lower stopper, which is equipped with, vertically to be extended in upper stopper cylinder, the drum surface of upper stopper is equipped with
Sliding slot, the drum surface of lower stopper is equipped with protrusion, and protrusion is placed in sliding slot, and stopper spring is arranged on the cylinder of upper stopper, is kept off
Block spring upper end is held out against on the end-stopping plate of upper stopper, and stopper spring lower end is pressed on the end-stopping plate of lower stopper.
The technical effects of the invention are that：In the use of the present invention, current limiter close flow can by change block size Lai
Change current limiter and close flow, current limiter inner core need to be redesigned to change the side that current limiter closes flow by being different from old structure
Case saves processing cost and process-cycle.Yoke seam but without gap is assemblied in current limliting body, solves old structure current limiter gear
Block thread looseness and snap problem.Current limliting body increases internal low-voltage oil duct, solves old structure current limiter fuel blow and arrives
The problem of external environment.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of yoke seam but without in the present invention.
Fig. 3 is the sectional view along A-A of Fig. 2.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with the accompanying drawings.
In Fig. 1 ~ 3, including current limliting body 1, Flow restrictor springs 2, current limiter inner core 3, yoke seam but without 4, low pressure oil duct 5,
Top oil duct 5-1, lower part oil duct 5-2, upper stopper 6, stopper spring 7, lower stopper 8, sliding slot 9, protrusion 10 etc..
As shown in Fig. 1 ~ 3, the present invention is a kind of high-power diesel engine current limiter, including current limliting body 1, the current limiter
1 inner cavity of body sliding setting current limiter inner core 3,3 top core of current limiter inner core is arranged Flow restrictor springs 2, the Flow restrictor springs 2
Upper end is held out against in 1 inner cavity upper end step face of current limliting body, and 2 lower end of Flow restrictor springs is pressed in 3 surface step face of current limiter inner core
On, cavity gap installs yoke seam but without 4 in current limliting body 1, and 3 lower end of current limiter inner core is supported in yoke seam but without 4, the limit
Stream 1 upper edge of body is axially arranged with low pressure oil duct 5, and 5 upper end of low pressure oil duct extends to 1 top surface of current limliting body, and 5 lower end of low pressure oil duct is prolonged
It extends at 1 cavity of resorption of current limliting body.
Low pressure oil duct 5 includes oil duct 5-1 in top connected in sequence and lower part oil duct 5-2, and top oil duct 5-1 is vertical oil
The upper end in road, lower part oil duct 5-2 is connected to the top lower ends oil duct 5-1, and the lower end of lower part oil duct 5-2 extends to current limliting body 1
At cavity outer ring.
Yoke seam but without 4 include can axially opposed movement upper stopper 6, lower stopper 8, lower stopper 8 barrel cooperation
It is set in 6 cylinder of upper stopper, the drum surface of upper stopper 6 is equipped with the sliding slot 9 vertically extended, the cylinder of lower stopper 8
Surface is equipped with protrusion 10, and protrusion 10 is placed in sliding slot 9, and stopper spring 7,7 upper end of stopper spring top are arranged on the cylinder of upper stopper 6
Tightly on the end-stopping plate of upper stopper 6,7 lower end of stopper spring is pressed on the end-stopping plate of lower stopper 8.
The course of work of the present invention is as follows：After high pressure fuel enters current limiter, due to the throttling action of current limiter inner core 3
In the front and back generation pressure difference of current limiter inner core 3, make current limiter inner core 3 that Flow restrictor springs 2 be overcome to move, when the flow by current limiter
When excessive, current limiter inner core 3 is bonded with current limliting body 1, and current limiter is closed, cutoff high fuel flow communication channel, reaches current limliting work
With.Wherein current limliting body has low pressure oil duct 5, can current limiter be mounted on the fuel oil import system low pressure leaked on common rail system
Oil circuit prevents fuel blow to external environment.Yoke seam but without 4 is made of upper stopper 6, lower stopper 8 and stopper spring 7, on
Block 6 has sliding slot 9, lower stopper 8 to have cylindrical protrusions 10.Upper stopper 6 can be in the limitation model of sliding slot 9 and protrusion 10 with lower stopper 8
Overcome stopper spring 7 to move in enclosing, ensures that 4 total height of yoke seam but without is variable.Yoke seam but without 4 is assemblied in current limliting body 1
Stopper spring 7 can be made to have compression pretightning force, which is more than the impact force to yoke seam but without 4 when current limiter core 2 works, from
And play the role of limiting axial position of the current limiter core 2 in current limliting body 1.
Claims (3)
1. a kind of high-power diesel engine current limiter, it is characterised in that：Including current limliting body（1）, the current limliting body（1）Inner cavity
Sliding setting current limiter inner core（3）, current limiter inner core（3）Top core is arranged Flow restrictor springs（2）, the Flow restrictor springs
（2）Upper end is held out against in current limliting body（1）Inner cavity upper end step face, Flow restrictor springs（2）Lower end is pressed in current limiter inner core（3）Table
On the step surface of face, current limliting body（1）Interior cavity gap installs yoke seam but without（4）, current limiter inner core（3）Lower end is supported in current limiter
Block（4）On, the current limliting body（1）Upper edge is axially arranged with low pressure oil duct（5）, low pressure oil duct（5）Upper end extends to current limiter
Body（1）Top surface, low pressure oil duct（5）Lower end extends to current limliting body（1）At cavity of resorption.
2. high-power diesel engine current limiter as described in claim 1, it is characterised in that：The low pressure oil duct（5）Including suitable
The top oil duct of secondary connection（5-1）With lower part oil duct（5-2）, top oil duct（5-1）For vertical oil duct, lower part oil duct（5-2）'s
Upper end and top oil duct（5-1）Lower end is connected to, lower part oil duct（5-2）Lower end extend to current limliting body（1）Cavity outer ring at.
3. high-power diesel engine current limiter as described in claim 1, it is characterised in that：The yoke seam but without（4）Including
Can axially opposed movement upper stopper（6）, lower stopper（8）, lower stopper（8）Barrel be equipped in upper stopper（6）Cylinder
In vivo, upper stopper（6）Drum surface be equipped with the sliding slot that vertically extends（9）, lower stopper（8）Drum surface be equipped with it is convex
It rises（10）, protrusion（10）It is placed in sliding slot（9）In, upper stopper（6）Cylinder on be arranged stopper spring（7）, stopper spring（7）Upper end
It holds out against in upper stopper（6）End-stopping plate on, stopper spring（7）Lower end is pressed in lower stopper（8）End-stopping plate on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810136135.9A CN108397329B (en) | 2018-02-09 | 2018-02-09 | Current limiter for high-power diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810136135.9A CN108397329B (en) | 2018-02-09 | 2018-02-09 | Current limiter for high-power diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108397329A true CN108397329A (en) | 2018-08-14 |
| CN108397329B CN108397329B (en) | 2020-08-25 |
Family
ID=63096057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810136135.9A Active CN108397329B (en) | 2018-02-09 | 2018-02-09 | Current limiter for high-power diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397329B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2307949A (en) * | 1941-08-05 | 1943-01-12 | Pump Engineering Service Corp | Flow restrictor |
| CN2048623U (en) * | 1988-12-29 | 1989-11-29 | 中国科学院金属研究所 | Current limiter |
| US5634489A (en) * | 1995-12-18 | 1997-06-03 | Dowty Decoto, Inc. | Hydraulic fuse |
| DE19621021A1 (en) * | 1996-05-24 | 1997-10-02 | Daimler Benz Ag | Flow rate limiter for fuel injection system |
| US6357415B1 (en) * | 1999-08-05 | 2002-03-19 | Denso Corporation | Fuel shut-off device for internal combustion engine |
| JP2004027966A (en) * | 2002-06-26 | 2004-01-29 | Bosch Automotive Systems Corp | Flow limiter |
| CN1293298C (en) * | 2002-11-15 | 2007-01-03 | 株式会社电装 | Accumulation type fuel jet system |
| CN201103735Y (en) * | 2007-10-31 | 2008-08-20 | 李飞宇 | Self-controlled pipe line liquid stream limiter |
| CN104018966A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Pressure accumulation flow-limiting type electromagnetic control oil sprayer |
| CN204186514U (en) * | 2014-10-16 | 2015-03-04 | 宁波舜田良源油嘴油泵有限公司 | A kind of restrictor of high pressure co-rail system |
| CN104769272A (en) * | 2012-10-30 | 2015-07-08 | 德尔福国际运营卢森堡有限公司 | Valve arrangement |
-
2018
- 2018-02-09 CN CN201810136135.9A patent/CN108397329B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2307949A (en) * | 1941-08-05 | 1943-01-12 | Pump Engineering Service Corp | Flow restrictor |
| CN2048623U (en) * | 1988-12-29 | 1989-11-29 | 中国科学院金属研究所 | Current limiter |
| US5634489A (en) * | 1995-12-18 | 1997-06-03 | Dowty Decoto, Inc. | Hydraulic fuse |
| DE19621021A1 (en) * | 1996-05-24 | 1997-10-02 | Daimler Benz Ag | Flow rate limiter for fuel injection system |
| US6357415B1 (en) * | 1999-08-05 | 2002-03-19 | Denso Corporation | Fuel shut-off device for internal combustion engine |
| JP2004027966A (en) * | 2002-06-26 | 2004-01-29 | Bosch Automotive Systems Corp | Flow limiter |
| CN1293298C (en) * | 2002-11-15 | 2007-01-03 | 株式会社电装 | Accumulation type fuel jet system |
| CN201103735Y (en) * | 2007-10-31 | 2008-08-20 | 李飞宇 | Self-controlled pipe line liquid stream limiter |
| CN104769272A (en) * | 2012-10-30 | 2015-07-08 | 德尔福国际运营卢森堡有限公司 | Valve arrangement |
| CN104018966A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Pressure accumulation flow-limiting type electromagnetic control oil sprayer |
| CN204186514U (en) * | 2014-10-16 | 2015-03-04 | 宁波舜田良源油嘴油泵有限公司 | A kind of restrictor of high pressure co-rail system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108397329B (en) | 2020-08-25 |
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