CN106762303A - Jetting stability hole type nozzle during the commercial diesel engine for automobile of one kind control small oil mass - Google Patents
Jetting stability hole type nozzle during the commercial diesel engine for automobile of one kind control small oil mass Download PDFInfo
- Publication number
- CN106762303A CN106762303A CN201611156658.7A CN201611156658A CN106762303A CN 106762303 A CN106762303 A CN 106762303A CN 201611156658 A CN201611156658 A CN 201611156658A CN 106762303 A CN106762303 A CN 106762303A
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- Prior art keywords
- needle
- valve
- diameter
- fuel
- diesel engine
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1893—Details of valve member ends not covered by groups F02M61/1866 - F02M61/188
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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)
Abstract
Jetting stability hole type nozzle during the commercial diesel engine for automobile of one kind control small oil mass, including needle-valve and needle-valve body, needle-valve head is made up of two-stage ladder, first order ladder height is 0.2~0.8 times of needle-valve maximum lift, the diameter of first order ladder, in small needle lift, reduces annular flow sectional area of the fuel oil between balancing gate pit's inner needle valve head and needle-valve body slightly larger than the diameter of second level ladder, nozzle hole area is less than, fuel-injected precise control during low discharge is realized；The internal diameter on needle-valve body top is identical with the external diameter of needle-valve and gap coordinates, and forms the axial seal face of high pressure fuel；Needle-valve body bottom centrum and needle-valve head boss form the atomizer sealing cone of control high pressure fuel injection；The needle-valve body lower outer diameter d2 of atomizer is in 11 13mm.While injection reliability of the present invention when systemic circulation fuel delivery is ensured is with dynamic property, the fuel flow performance of atomizer, improves jetting stability during small oil mass when improving small oil mass.
Description
Technical field
The present invention relates to the fuel oil supply system of commercial diesel engine for automobile, a kind of commercial derv fuel of control is specifically related to
Fuel oil jetting stability hole type nozzle during machine small oil mass.
Background technology
It is diesel engine performance and emission request that satisfaction is increasingly improved, automatically controlledization has turned into inexorable trend.It is diesel electric-controlled
Core be electric control fuel oil jet system, and common-rail injector is the assembly of most critical and precision in electronic control common rail system, with
Modern diesel engine to fuel injector distributive value precision and the raising of response performance requirement, and distributive value, spray to different operating modes
The coherence request of the basic parameters such as oily duration to its structure and parameter, it is necessary to constantly optimize.
Fuel injector is the important component in diesel fuel system, and atomizer is the crucial portion of the performance for influenceing fuel injector
Part.The conventional diesel engine injector nozzle matching parts in commercial car is applied at present, hole nozzle is, to ensure during its high speed
Power performance, using high injection pressure, circulating fuel injection quantity is larger, but in low idling operation, circulating fuel injection quantity is smaller, commercial car
Diesel engine fuel injection system largest loop distributive value is larger with the ratio between minimal circulation distributive value, and oil supply system is easy during partial circulating distributive value
Periodically fluctuation is produced, so that circulating fuel injection quantity fluctuates；Hole nozzle easily occurs under low speed, running on the lower load
Because needle-valve vibration and caused by fluctuate jet phenomenon, be difficult to be guaranteed which results in small oil mass jetting stability during low idling, enter
And influence fuel injector performance.In addition, some electric-controlling injection systems spray oil every time using pilot injection, rear injection or multi-injection
Measure very little and require that jetting stability is controllable, it is higher to jetting stability requirement.
Chinese patent discloses a kind of small cylinder diameter swirl chamber diesel engine atomizer.Oil nozzle for diesel engine (authorizes publication number：
The U of CN 203248299), including needle-valve and needle-valve body.Needle-valve is shaft-like cylindrical solid, and needle-valve body is lumen type entity, needle-valve assembling
In needle-valve body, both grind pairing and use.It passes through rationally to design needle-valve and needle-valve body head sizes, reduces atomizer stream
Logical area, controls maximum lift h of the needle-valve in needle-valve body for 0.18~0.4mm, in the circulation area of needle lift maximum
No more than 0.18mm2.But this atomizer is only applicable to small cylinder diameter swirl chamber diesel engine, though and reduce atomizer circulating face
Product, fuel oil jetting stability sex chromosome mosaicism during diesel engine with direct injection hole type nozzle small oil mass is not related to.
Chinese patent also discloses a kind of regulating device of flow section for standard injector and (authorizes publication number：CN 85201403
U).By changing the flow area of spray orifice using screw mechanism and regulation conehead, continuously adjust flow area, it is various to meet
The adjustment of the injection pump in the range of distributive value.In small distributive value, which solve due to the stepping survey measurements that faciola does not come not
The steady and overproof problem of certainty of measurement, but the mechanism is done on throttle type standard injector (i.e. BOSCH standard injectors)
Improvement, be not particularly suited for present high pressure common rail injector.
Chinese patent also disclosed a kind of internal combustion engine injector valve couple, including needle-valve and needle-valve body (authorize public
The number of opening：CN 202937394 U).It passes through needle-valve head design into the three-level conical surface, the first order conical surface and the second level conical surface it
Between machined ring-shaped step, the ring-shaped step constitutes the sealing ring between needle-valve and needle-valve body, the second level conical surface and the third level
Arc transition between the conical surface.Although the pintle nozzle match-ing parts can form minimum circulation at needle-valve sealing ring in needle lift very little and cut
Face, realizes the control to the small lift distributive value of fuel injector, but it is improved in terms of the mismachining tolerance of needle-valve and needle-valve sealing surface
Fuel injector, does not get on control solution as conventional atomizer from the relation of face of needle seating ring-like flow area and nozzle hole area
The problem of certainly small oil mass jetting stability.
The content of the invention
For the problem of the small oil mass jetting stability of current conventional diesel engine hole type nozzle, the invention discloses a kind of new
Type hole type nozzle, by rationally design hole nozzle needle-valve head construction and size, makes needle-valve head be in staged cylinder
Body, when needle lift is smaller, it can be ensured that minimum flow area is formed at needle-valve and balancing gate pit, so as to realize to fuel injector
The precise control of the small lift distributive value of needle-valve, and needle-valve compared with high-lift when, minimum actual internal area only by spray orifice sectional area control,
So as to improve oil spout stability, the functional reliability of atomizer is improve；When systemic circulation distributive value is ensured, jet performance is same
When, jetting stability during small oil mass can be effectively improved, while reducing balancing gate pit's volume, it is possible to decrease HC and soot emissions, carry
Economy high and Diesel Engine Complete Machine performance.
In low idling operation, because circulating fuel injection quantity is smaller, circulation area is larger so that the non-standard-sized sheet of needle lift, pole
Easily there is fluctuation jet phenomenon.Reduce atomizer circulation area during compared with partial circulating distributive value so that needle lift during low discharge
Increase, oil spout wave phenomenon can be reduced, improve fuel oil jetting stability.
To achieve the above object, the technical scheme of use is the present invention:
Jetting stability hole type nozzle during the commercial diesel engine for automobile of one kind control small oil mass, including needle-valve and needle-valve
Body, the internal diameter on needle-valve body top is identical with the external diameter of needle-valve and gap coordinates, and forms the axial seal face of high pressure fuel；In needle-valve
Head rationally designs boss, reduces annular flow sectional area of the fuel oil between balancing gate pit's inner needle valve head and needle-valve body, is allowed to
Less than nozzle hole area, fuel-injected precise control during low discharge is realized；Needle-valve body bottom centrum and needle-valve head boss are formed
Control the atomizer sealing cone of high pressure fuel injection；Lower edge in the pressure-bearing conical surface of needle-valve and edge on atomizer sealing cone
Footpath 0.6-0.9mm bigger than needle-valve external diameter in length inner needle valve body, forms oil holding slot to the fuel gallery of atomizer head spray orifice；Spray
The needle-valve body lower outer diameter d2 of oil nozzle is in 11-13mm.
Further, the needle-valve head is the face of cylinder, and in step variation.
Further, the needle-valve head is made up of two-stage ladder, and first order ladder height is the 0.2 of needle-valve maximum lift
~0.8 times, maximum lift of the second level ladder height no more than needle-valve；The diameter of first order ladder is slightly larger than second level ladder
Diameter, to ensure that fuel injector minimum flow area is spray orifice sectional area when larger circulating fuel injection quantity, needle-valve standard-sized sheet.
When needle-valve open amount is smaller, fuel injector minimum flow area is that annular flow cuts at needle-valve head and balancing gate pit
Face, and it is slightly less than each spray orifice flow area sum.
Beneficial effects of the present invention：
(1) compared with needle-valve head shape in existing atomizer is for taper, multistage ladder circle cylindricality pin proposed by the present invention
Valve head is effectively reduced impulsive force of the needle-valve to needle valve seat surface, improves the functional reliability and service life of atomizer；
(2) balancing gate pit's fuel oil volume is reduced, fuel oil is sprayed the dribble for terminating and is reduced, burning is timely, is conducive to
Fuel-oil atmozation with mix, improve the atomizer end carbon deposit and diesel engine HC and soot emissions for thus resulting in；
(3) pumping volume is reduced, the energy that injection pump force feed is produced is risen the pumping for causing in oil holding slot by needle-valve
Effect uptake reduces, and more for fuel oil injection, injection pressure is improved；
(4) increase fuel flow communication section between needle-valve guide section and seat surface sealing cone, improve fuel flow communication performance, while
The fuel oil of flowing is cooled down to needle-valve, is conducive to reducing the thermic load of atomizer, is reduced because of the generation of atomizer local heating
The stuck failure of oil nozzle, fuel injector reliability is high；
(5) by rationally design needle-valve stepped cylindrical sizes at different levels, the injection reliability when systemic circulation fuel delivery is ensured
While with dynamic property, the fuel flow performance of atomizer when improving small oil mass, it is ensured that formed most at needle-valve and balancing gate pit
Small circulation section, improves jetting stability during small oil mass.
Brief description of the drawings
Fig. 1 is atomizer structural representation of the invention.
Fig. 2 is atomizer head construction schematic diagram of the invention.
Fig. 3 is partial enlarged drawing at atomizer balancing gate pit of the present invention.
Fig. 4 is former atomizer head construction schematic diagram.
Marked in figure：1- needle-valves, 2- needle-valve bodies, 3- first order ladders, 4- second level ladder, 5- spray orifices, 6- axial seals
Face, the 7- pressure-bearing conical surfaces, 8- oil holding slots, 9- compression fits face, 10- sealing cones.
Specific embodiment
In order to be more clearly understood to the technical characteristic invented, purpose and effect, now control brief description of the drawings is of the invention
Specific embodiment, accompanying drawing is merely to illustrate the present invention, practical structures of the invention and actual proportions do not represented.
The present invention is implemented so that certain diesel engine of commercial vehicle supports the use hole type nozzle as an example.To control the diesel engine of commercial vehicle
Jetting stability during small oil mass, to the atomizer structure design structure as Figure 1-4.Oil-fuel injector needle-valve is shaft-like cylinder
Entity, needle-valve body is lumen type entity, and needle-valve is assemblied in needle-valve body, and needle-valve body lower outer diameter d2 is in 11-13mm, needle-valve body top
Outside diameter d 1 is 1.8-2.1 times of d2；Maximum lift of the height of second level ladder 4 no more than needle-valve 1；The diameter d3 of the needle-valve 1
In 7-9mm.The internal diameter on needle-valve body top is identical with the external diameter of the guide section on needle-valve top and gap coordinates, and forms high pressure fuel
Axial seal face；The bottom of needle-valve body and needle-valve head two-stage stepped cylindrical body form the seat surface sealing cone of atomizer, needle-valve
Increase fuel flow communication section between guide section and seat surface sealing cone；There is larger gap between the following needle-valve of oil holding slot and needle-valve body
(more than 0.5mm), there is provided fuel oil is left to the passage at nozzle opening.
According to the relation between annular flow sectional area and nozzle hole area, following formula can be obtained
Arrange
Wherein, i is orifice number, and d is injection diameter, and D is balancing gate pit's diameter, and δ is the thickness in annular flow section, α values
0.2~0.8.
The known diesel engine of commercial vehicle hole type nozzle aperture is 0.155mm, and hole count is that 7, D is 1mm, according to formula (2), when
During α values 0.2, δ is calculated equal to 0.0084mm；When α values 0.8, δ is calculated equal to 0.0336mm, it is current right to be satisfied by
The requirement on machining accuracy of atomizer.
When the present invention is installed and used on a diesel engine, needle-valve head is changed into multistage ladder cylinder from cone, reduces pin
Valve increased the working life of injector nozzle matching parts to the impulsive force of needle valve seat surface；Balancing gate pit's volume is reduced, fuel oil is sprayed knot
The dribble of beam is reduced, and makes burning in time, improves the atomizer end carbon deposit and diesel engine HC and soot emissions for thus resulting in；
Pumping volume is reduced so that pressure oscillation reduces in oil holding slot, needle-valve working stability, so as to improve oil spout with burning；Needle-valve
Increase fuel flow communication section between guide section and seat surface sealing cone, improve fuel flow communication performance, while the fuel oil of flowing is to pin
Valve is cooled down, and is reduced because of the stuck failure of oil nozzle that atomizer local heating produces；Atomizer when improving small needle lift
Fuel flow performance, it is ensured that form minimum flow area at needle-valve and balancing gate pit, improve jetting stability during small oil mass.
Those listed above describes illustrating only for possible embodiments of the invention in detail, and is not used to
Limit the scope of the invention, all Equivalent embodiments made without departing from skill spirit of the present invention or change should be included in this
Within the protection domain of invention.
Claims (5)
1. jetting stability hole type nozzle during a kind of commercial diesel engine for automobile of control small oil mass, including needle-valve (1) and needle-valve
Body (2), it is characterised in that characterized in that, the needle-valve (1) head is cylinder, and in step variation.
2. jetting stability cellular type oil spout during a kind of commercial diesel engine for automobile of control according to claim 1 small oil mass
Mouth, it is characterised in that needle-valve (1) head is made up of two-stage ladder；First order ladder (3) is highly for needle-valve (1) most rises higher
0.2~0.8 times of journey, second level ladder (4) is highly no more than the maximum lift of needle-valve (1)；The diameter of first order ladder (3) is omited
More than the diameter of second level ladder (4)；Circulating fuel injection quantity is larger, needle-valve standard-sized sheet when, fuel injector minimum flow area is each spray
Hole (5) circulation area sum；When needle-valve open amount is smaller, fuel injector minimum flow area is needle-valve (1) head and balancing gate pit
Place annular flow section, and it is slightly less than each spray orifice (5) flow area sum.
3. jetting stability cellular type oil spout during a kind of commercial diesel engine for automobile of control according to claim 1 small oil mass
Mouth, it is characterised in that the head sizes relation of the needle-valve (1) is：
Wherein, i is orifice number, and d is injection diameter, and D is balancing gate pit's diameter, and δ is the thickness in annular flow section, and α values are 0.2
~0.8.
4. jetting stability cellular type oil spout during a kind of commercial diesel engine for automobile of control according to claim 1 small oil mass
Mouth, it is characterised in that needle-valve body (2) upper inner diameter is identical with needle-valve (1) top external diameter and gap coordinates, and forms compression ignition high
Oily axial seal face (6)；Between the lower edge of the pressure-bearing conical surface (7) of needle-valve (1) and the upper edge of atomizer sealing cone (10)
Length inner needle valve body (2) internal diameter forms oil holding slot (8) to atomizer head spray orifice (5) than needle-valve (1) the big 0.6-0.9mm of external diameter
Fuel flow path.
5. jetting stability cellular type oil spout during a kind of commercial diesel engine for automobile of control according to claim 1 small oil mass
Mouth, it is characterised in that needle-valve body (2) the lower outer diameter d2 of the atomizer is the 1.8- of d2 in 11-13mm, top outside diameter d 1
2.1 times, the diameter d3 of the needle-valve (1) is in 7-9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156658.7A CN106762303B (en) | 2016-12-15 | 2016-12-15 | Jetting stability hole type nozzle when a kind of commercial diesel engine for automobile of control small oil mass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611156658.7A CN106762303B (en) | 2016-12-15 | 2016-12-15 | Jetting stability hole type nozzle when a kind of commercial diesel engine for automobile of control small oil mass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762303A true CN106762303A (en) | 2017-05-31 |
| CN106762303B CN106762303B (en) | 2019-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611156658.7A Expired - Fee Related CN106762303B (en) | 2016-12-15 | 2016-12-15 | Jetting stability hole type nozzle when a kind of commercial diesel engine for automobile of control small oil mass |
Country Status (1)
| Country | Link |
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| CN (1) | CN106762303B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404192A (en) * | 2019-01-08 | 2019-03-01 | 北油电控燃油喷射系统(天津)有限公司 | A kind of electronic fuel injection and the fuel injector including it |
| CN114060192A (en) * | 2021-10-28 | 2022-02-18 | 江苏大学 | Sectional type oil nozzle and optimal design method thereof |
| CN114522817A (en) * | 2022-04-21 | 2022-05-24 | 山西海普瑞科技有限公司 | Nozzle structure for preventing high-pressure water jet from being damaged |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102659A (en) * | 1985-04-01 | 1986-02-10 | 大连工学院 | Multi-hole injector with small pressure chamber |
| CN1047130A (en) * | 1990-05-31 | 1990-11-21 | 高崇新 | Multi-stage sealed oil nozzle |
| GB2255802A (en) * | 1991-05-15 | 1992-11-18 | Lucas Ind Plc | Pintle fuel injection nozzle. |
| JPH0932696A (en) * | 1995-07-14 | 1997-02-04 | Mitsubishi Motors Corp | Two-stage opening valve pressure type fuel injection valve |
| WO2001051806A1 (en) * | 2000-01-10 | 2001-07-19 | Robert Bosch Gmbh | Fuel injection nozzle |
| JP2004332544A (en) * | 2003-04-30 | 2004-11-25 | Mitsubishi Heavy Ind Ltd | Fuel injection device for internal combustion engine |
| JP4296724B2 (en) * | 2000-09-14 | 2009-07-15 | 株式会社デンソー | Fuel injection nozzle |
| CN202937394U (en) * | 2012-12-04 | 2013-05-15 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Novel fuel spray nozzle needle valve coupler of internal combustion engine |
| CN203248299U (en) * | 2013-05-10 | 2013-10-23 | 江苏大学 | Oil nozzle for small cylinder diameter swirl chamber diesel |
-
2016
- 2016-12-15 CN CN201611156658.7A patent/CN106762303B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85102659A (en) * | 1985-04-01 | 1986-02-10 | 大连工学院 | Multi-hole injector with small pressure chamber |
| CN1047130A (en) * | 1990-05-31 | 1990-11-21 | 高崇新 | Multi-stage sealed oil nozzle |
| GB2255802A (en) * | 1991-05-15 | 1992-11-18 | Lucas Ind Plc | Pintle fuel injection nozzle. |
| JPH0932696A (en) * | 1995-07-14 | 1997-02-04 | Mitsubishi Motors Corp | Two-stage opening valve pressure type fuel injection valve |
| WO2001051806A1 (en) * | 2000-01-10 | 2001-07-19 | Robert Bosch Gmbh | Fuel injection nozzle |
| JP4296724B2 (en) * | 2000-09-14 | 2009-07-15 | 株式会社デンソー | Fuel injection nozzle |
| JP2004332544A (en) * | 2003-04-30 | 2004-11-25 | Mitsubishi Heavy Ind Ltd | Fuel injection device for internal combustion engine |
| CN202937394U (en) * | 2012-12-04 | 2013-05-15 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Novel fuel spray nozzle needle valve coupler of internal combustion engine |
| CN203248299U (en) * | 2013-05-10 | 2013-10-23 | 江苏大学 | Oil nozzle for small cylinder diameter swirl chamber diesel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404192A (en) * | 2019-01-08 | 2019-03-01 | 北油电控燃油喷射系统(天津)有限公司 | A kind of electronic fuel injection and the fuel injector including it |
| CN114060192A (en) * | 2021-10-28 | 2022-02-18 | 江苏大学 | Sectional type oil nozzle and optimal design method thereof |
| CN114522817A (en) * | 2022-04-21 | 2022-05-24 | 山西海普瑞科技有限公司 | Nozzle structure for preventing high-pressure water jet from being damaged |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106762303B (en) | 2019-08-27 |
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Granted publication date: 20190827 Termination date: 20211215 |