CN106089523A - A kind of high pressure common rail electric control fuel injector - Google Patents
A kind of high pressure common rail electric control fuel injector Download PDFInfo
- Publication number
- CN106089523A CN106089523A CN201610671931.3A CN201610671931A CN106089523A CN 106089523 A CN106089523 A CN 106089523A CN 201610671931 A CN201610671931 A CN 201610671931A CN 106089523 A CN106089523 A CN 106089523A
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- Prior art keywords
- valve
- metering
- orifice
- oil
- high pressure
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Classifications
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- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
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- 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
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- 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
- F02M61/161—Means for adjusting injection-valve lift
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- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
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- 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
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0077—Valve seat details
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of high pressure common rail electric control fuel injector, the cap being connected including injector body with the bottom of injector body；Eccentric orfice in injector body bottom is sequentially provided with high-speed electromagnetic valve, hydraulic servocontrol valve, double metering-orifice valve from top to bottom, controls piston component, push rod and pintle nozzle match-ing parts, and compressed by cap；Be provided with high pressure fuel entrance in the upper end of injector body, upper end sidewall is provided with low pressure oil return opening, middle part is provided with cable socket；The upper end of high-speed electromagnetic valve is corresponding with described cable socket；The fuel oil high pressure fuel entrance from injector body upper end enters, and through double metering-orifice valves, control piston component and enter pintle nozzle match-ing parts injection, after flowed back to oil to case by low pressure oil return opening through controlling piston component and double metering-orifice valve.The present invention can improve oil spout response speed, beneficially multi-injection, reduces the oil consumption of diesel engine, improves the discharge of diesel engine；Simple in construction, quality is less, it is simple to processing and manufacturing and assembling and setting, reduces processing cost.
Description
Technical field
The present invention relates to fuel of internal combustion engine system, be specifically related to a kind of high pressure common rail electric control fuel injector.
Background technology
Along with the increasingly stringent of Abgasgesetz and increasingly sharpening of energy crisis, internal combustion engine is to the requirement of fuel system day by day
Improve.For meeting the performance indications such as the emission performance of internal combustion engine, economy, the high pressure co-rail system response speed to electric-controlled fuel injector
Require more and more higher, it is desirable to meet the Abgasgesetz of increasingly stringent and user to fuel-economy by more flexible repeatedly oil spout
The requirement of property.At present, high pressure common rail electric control fuel injector on the one hand structure is complicated, and the processing and manufacturing of parts requires high, produces
Cost is high；On the other hand high pressure common rail electric control fuel injector movement parts part mass is relatively big, controls chamber volume the biggest, causes automatically controlled
Fuel injector response speed is slow, it is impossible to meet the highest oil spout response speed requirement.In view of the foregoing, a kind of structure of exploitation
Relatively easy, there is good process, additionally it is possible to the high pressure common rail electric control fuel injector of the response speed improving fuel injector is the most right
The economy and the emission performance tool that improve diesel engine are of great significance." a kind of piezoelectric type height of CN101963119B bulletin
Pressure common rail electric-controlled fuel injector ", solve the problem that existing high pressure common rail injector structure is complicated, jet performance is poor.Piezoquartz
Formula two-port valve includes piezoquartz executor, piezo actuator push rod, valve seat, valve, spring, spring base, entering on oil injector body
Oilhole interface is connected with the pressure chamber on needle-valve body and oil duct through oil injector body fuel feed hole, valve seat fuel feed hole, needle-valve body fuel feed hole
Logical, fuel feed hole is also through meter in hole and control chamber UNICOM；Control chamber through fuel-displaced throttle orifice and big spill port and valve UNICOM, valve warp
Spill port on little spill port, the oil-recovery tank of valve seat upper surface, oil injector body and spill port interface UNICOM.This fuel injector has 11
Individual part, simple in construction good airproof performance, can be used for supertension common-rail injection system；Fast response time can accurately regulate oil spout speed
Rate, it is achieved multiple fuel injection, can improve the efficiency of combustion of diesel engine, reduce fuel consumption and exhaust emission.Certainly,
This be art be to solve the in-problem a kind of good try of prior art.
Summary of the invention
It is an object of the invention to provide a kind of high pressure common rail electric control fuel injector, it can improve oil spout response speed, favorably
In multi-injection, reduce the oil consumption of diesel engine, improve the discharge of diesel engine；Simple in construction, quality is less, it is simple to processing and manufacturing and
Assembling and setting, reduces processing cost.
A kind of high pressure common rail electric control fuel injector of the present invention, including injector body and the bottom of injector body
Threaded cap；Eccentric orfice in described injector body bottom is sequentially provided with high-speed electromagnetic valve, liquid from top to bottom
Pressure pilot valve, double metering-orifice valve, control piston component, push rod and pintle nozzle match-ing parts, and compressed by described cap；In described spray
The upper end of oil device body is provided with high pressure fuel entrance, upper end sidewall is provided with low pressure oil return opening, middle part is provided with cable socket；Described height
The upper end of speed electromagnetic valve is corresponding with described cable socket, and is compressed, also by O-ring seals by holddown spring and adjustment pad
Seal；The fuel oil high pressure fuel entrance from injector body upper end enters, and enters pin through double metering-orifice valves, control piston component
Valve coupling sprays, after flowed back to oil to case by low pressure oil return opening through controlling piston component and double metering-orifice valve.
Further, described hydraulic servocontrol valve include guide holder, the armature being located at guide holder upper end, through guide holder and
The mandrel of armature；The lower end of described mandrel is stretched out from the lower end of guide holder and is provided with a steel ball seat, in the lower end of this steel ball seat
The heart is provided with a steel ball；The upper end of described mandrel coordinates through guide holder and armature with collar, adjustment pad and return spring and inserts
The centre bore entering described high-speed electromagnetic valve bottom coordinates location, the steel ball of described steel ball seat lower center and described pair of metering-orifice valve
Upper surface against；Described guide holder is provided with multiple intercommunicating pore vertically, and described guide holder is used for guiding and adjust described high speed
Working gas gap X1 between electromagnetic valve and armature；Described armature is provided with four drag reduction holes vertically；Described return spring and tune
Whole pad acts on mandrel upper end, by mandrel together with collar, armature, steel ball seat, the upper surface of steel ball and double metering-orifice valves
Compress, it is achieved the sealing of high pressure fuel.
Further, described pair of metering-orifice valve is split-type structural, including double metering-orifice valve upper bodies and double metering-orifice valve lower body；Described double
The upper surface of metering-orifice valve upper body and described steel ball against, described pair of metering-orifice valve upper body is provided with oil back chamber and back oil road；Described double
Metering-orifice valve lower body is provided with oil-feed metering-orifice, low pressure spill port and fuel-displaced metering-orifice, and described oil-feed metering-orifice and fuel-displaced metering-orifice all use partially
The heart is arranged.
Further, described control piston component includes controlling piston bush and controlling the control piston that piston bush inwall coordinates,
The lower end of described control piston by described push rod and described pintle nozzle match-ing parts against, described push rod is combined with pressure spring and
Pad；Described control piston bush is provided with axially disposed high-pressure oil duct and low pressure back oil road, and the upper end of described control piston is
Controlling chamber, described pair of metering-orifice valve is for controlling the fuel pressure characteristic in described control chamber.
Further, described pintle nozzle match-ing parts includes needle-valve body and matched needle-valve；Described needle-valve and described push rod against.
Further, the height of described push rod be 7mm, a diameter of 8mm.
Further, described mandrel is divided into A, B, C, D tetra-sections from top to bottom, and outside diameter increases the most successively；
Wherein: the outside diameter of A section is minimum, and described adjustment pad and return spring coordinate location with A section；The outside diameter of B section is less than C
The outside diameter of section, described collar and armature coordinate location with B section；The outside diameter of D section, more than the outside diameter of C section, is used for
Control the stroke X2 of mandrel.
Further, described control piston uses low height, wide-angle structure, and its height is 20mm, and a diameter of 6mm, to subtract
Light sole mass；Its head angle, for using 175 °, effectively reduces the volume controlling chamber controlling piston upper end, improves system
Response speed.
Beneficial effects of the present invention: owing to high-speed electromagnetic valve and hydraulic servocontrol valve are arranged under injector body
Portion, reduces the distance between high-speed electromagnetic valve and pintle nozzle match-ing parts, is conducive to alleviating the quality of movement parts, improves oil spout response speed
Degree；Due to the simple in construction of hydraulic servocontrol valve, movement parts quality is little, can effectively reduce scheduling and planning cost, improves oil spout
Response speed；Use the wide-angle design of 175 ° owing to controlling piston upper end, in order to reduce the volume controlling chamber, improve oil spout
Response speed.Control piston in axially having the stroke range of 0.4mm, in order to control the lift of needle-valve；Owing to needle-valve uses
Without stern construction, it is simple to contact with push rod, and compensate part's machining errors, advantageously reduce production cost.
Accompanying drawing explanation
Fig. 1 is the appearance schematic diagram of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the structural representation of hydraulic servocontrol valve.
Fig. 4 is the structural representation of double metering-orifice valve.
Fig. 5 is the structural representation controlling piston component.
In Fig. 1: 1-injector body, 11-high pressure fuel import, 12-cable socket, 13-low pressure oil return opening, 14-
Cap, 15-push rod；
2-pintle nozzle match-ing parts, 21-needle-valve body, 22-needle-valve；
3-hydraulic servocontrol valve, 30-mandrel, 31-collar, 32-guide holder, 33-steel ball seat, 34-steel ball, 35-is even
Through hole, 36-drag reduction hole, 37-armature, 38-adjusts pad, 39-return spring；
4-high-speed electromagnetic valve, 5-O shape sealing ring, 6-holddown spring, 7-adjusts pad；
8-controls piston component, and 81-controls piston, 82-high-pressure oil duct, and 83-controls piston bush, 84-pressure spring,
85-pad, 86-low pressure back oil road, 87-controls chamber；
The double metering-orifice valve (9) of 9-, the double metering-orifice upper body of 91-, the double metering-orifice lower body of 92-, 93-oil-feed metering-orifice, 94-low pressure spill port,
The fuel-displaced metering-orifice of 95-, 96-low pressure chamber, 97-spill port.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
Seeing Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, shown a kind of high pressure common rail electric control fuel injector, including injector body
1 cap 14 being connected with the lower thread of injector body, its prominent substantive distinguishing features is: described injector body 1 time
Eccentric orfice in portion is sequentially provided with high-speed electromagnetic valve 4, hydraulic servocontrol valve 3, double metering-orifice valve 9 from top to bottom, controls piston
Assembly 8, push rod 15 and pintle nozzle match-ing parts 2, and compressed by described cap 14, injector body bottom uses eccentric orfice design, with
It is easy to high-pressure oil duct arrange；Be provided with high pressure fuel entrance 11 in the upper end of described injector body 1, upper end sidewall is provided with low pushing back
Hydraulic fluid port 13, middle part are provided with cable socket 12；The upper end of described high-speed electromagnetic valve 4 is corresponding with described cable socket 12, and by pressure
Tight spring 6 and adjustment pad 7 compress, and seal also by O-ring seals, to prevent fuel oil from entering the cable district of high-speed electromagnetic valve
Territory；The fuel oil high pressure fuel entrance from injector body upper end enters, and enters needle-valve through double metering-orifice valves, control piston component
Couple is sprayed, after flowed back to oil to case by low pressure oil return opening through controlling piston component and double metering-orifice valve.By high-speed electromagnetic valve and liquid
Pressure pilot valve is arranged on the bottom of injector body, to reduce the distance between high-speed electromagnetic valve and pintle nozzle match-ing parts, is beneficial to
Alleviate movement parts quality, improve oil spout response speed.
Described hydraulic servocontrol valve 3 include guide holder 32, the armature 37 being located at guide holder upper end, through guide holder and rank
The mandrel 30 of ferrum；The lower end of described mandrel is stretched out from the lower end of guide holder and is provided with a steel ball seat 33, in the lower end of this steel ball seat
Center is provided with a steel ball 34；The upper end of described mandrel passes guide holder and armature and collar 31, adjustment pad 38 and return spring
39 coordinate and insert the centre bore of described high-speed electromagnetic valve 4 bottom and coordinate location, the steel ball 34 of described steel ball seat lower center with
The upper surface of described pair of metering-orifice valve 9 against；Described guide holder 32 is provided with multiple intercommunicating pore 35 vertically, and described guide holder is used for leading
To and adjust the working gas gap X1 between described high-speed electromagnetic valve 4 and armature 37；Described armature 37 is provided with four vertically and subtracts
Resistance hole 36, for reducing the resistance of liquid in motor process, improves the response speed of system；Described return spring and adjusting pad
Sheet acts on mandrel upper end, is compressed with the upper surface of double metering-orifice valves together with collar, armature, steel ball seat, steel ball by mandrel,
Realize the sealing of high pressure fuel.The simple in construction of described hydraulic servocontrol valve, movement parts quality is little, can effectively reduce production and adjust
Examination cost, improves the response speed of oil spout.
Described pair of metering-orifice valve 9 is split-type structural, including double metering-orifice valve upper bodies 91 and double metering-orifice valve lower body 92；Described double amount
The upper surface of ports valve upper body 91 and described steel ball 34 against, described pair of metering-orifice valve upper body is provided with oil back chamber 96 and back oil road 97,
Described pair of metering-orifice valve compresses and the recovery of low-voltage fuel for hydraulic servocontrol valve and installing of high-speed electromagnetic valve；Described double
Metering-orifice valve lower body 92 is provided with oil-feed metering-orifice 93, low pressure spill port 94 and fuel-displaced metering-orifice 95, described oil-feed metering-orifice and fuel-displaced metering-orifice
All use arranged off-centre.A diameter of 0.3mm of described oil-feed metering-orifice, a diameter of 0.42mm of fuel-displaced metering-orifice.
Described control piston component 8 includes controlling piston bush 83 and controlling the control piston 81 that piston bush inwall coordinates, institute
State the lower end controlling piston by described push rod 15 and described pintle nozzle match-ing parts 2 against, described push rod is combined with pressure spring
84 and pad 85, pressure spring and control piston push rod is pressed in pintle nozzle match-ing parts, it is achieved high pressure during the non-oil spout of pintle nozzle match-ing parts
Seal；Described control piston bush 83 is provided with axially disposed high-pressure oil duct 82 and low pressure back oil road 86) described control piston 81
Upper end for controlling chamber 87, the described pair of metering-orifice valve 9 is for controlling the fuel pressure characteristic in described control chamber 87.Control piston sheathed
Being equipped with high-pressure oil duct and low pressure back oil road, low pressure back oil road makes pintle nozzle match-ing parts and controls the leakage fuel oil of piston by fuel injector originally
Body back oil road flows back into fuel tank, it is to avoid leakage fuel oil is controlling to be formed between piston component and pintle nozzle match-ing parts pocketed oil, affects needle-valve
Control the normal work of piston and pintle nozzle match-ing parts.
Described pintle nozzle match-ing parts 2 includes needle-valve body 21 and matched needle-valve 22；Described needle-valve and described push rod 15 against.
Needle-valve uses without stern construction, it is simple to contact with push rod, and compensates part's machining errors, advantageously reduces production cost.
The height of described push rod 15 is 7mm, a diameter of 8mm.By matching the length dimension of push rod, to compensate part processing
Error, controls the lift of needle-valve.
Described mandrel 30 is divided into A, B, C, D tetra-sections from top to bottom, and outside diameter increases the most successively；Wherein: A
The outside diameter of section is minimum, and described adjustment pad 38 and return spring 39 coordinate location with A section；The outside diameter of B section is less than C section
Outside diameter, described collar 31 and armature 37 coordinate location with B section；The outside diameter of D section, more than the outside diameter of C section, is used
In the stroke X2 controlling mandrel 30.
Described control piston 81 uses low height, wide-angle structure, and its height is 20mm, and a diameter of 6mm, to alleviate self
Quality；Its head angle, for using 175 °, effectively reduces the volume controlling chamber 87 controlling piston upper end, improves the response of system
Speed.Control piston upper end and use the wide-angle design of 175 °, in order to reduce the volume controlling chamber, improve the response speed of oil spout
Degree.Control piston in axially having the stroke range of 0.4mm, in order to control the lift of needle-valve.
By the innovation structure of key components and parts is designed, on the one hand, by simplifying the structure of electric-controlled fuel injector, reduce
The processing of electric-controlled fuel injector parts and assembling and setting cost；On the other hand, by alleviating movement parts moving-mass and reducing control
Chamber processed volume, improves the response speed of electric-controlled fuel injector, is advantageously implemented the multi-injection of electric-controlled fuel injector, improves diesel engine
Oil consumption and discharge.
Claims (8)
1. a high pressure common rail electric control fuel injector, the cover being connected with the lower thread of injector body including injector body (1)
Cap (14), is characterized in that: be sequentially provided with high-speed electromagnetic valve from top to bottom in the eccentric orfice in described injector body (1) bottom
(4), hydraulic servocontrol valve (3), double metering-orifice valve (9), control piston component (8), push rod (15) and pintle nozzle match-ing parts (2), and lead to
Cross described cap (14) to compress；Be provided with high pressure fuel entrance (11) in the upper end of described injector body (1), upper end sidewall is provided with
Low pressure oil return opening (13), middle part are provided with cable socket (12)；The upper end of described high-speed electromagnetic valve (4) and described cable socket (12)
Correspondence, and compressed by holddown spring (6) and adjustment pad (7), seal also by O-ring seals；Fuel oil is from injector body
The high pressure fuel entrance of upper end enters, and through double metering-orifice valves, control piston component and enter pintle nozzle match-ing parts injection, after through controlling
Piston component and double metering-orifice valve are flowed back to oil to case by low pressure oil return opening.
High pressure common rail electric control fuel injector the most according to claim 1, is characterized in that: described hydraulic servocontrol valve (3) is wrapped
Include guide holder (32), be located at the armature (37) of guide holder upper end, through the mandrel (30) of guide holder and armature；Under described mandrel
End stretches out from the lower end of guide holder and is provided with a steel ball seat (33), and the lower center in this steel ball seat is provided with a steel ball (34)；Institute
The upper end stating mandrel coordinates through guide holder and armature with collar (31), adjustment pad (38) and return spring (39) and inserts institute
The centre bore stating high-speed electromagnetic valve (4) bottom coordinates location, the steel ball (34) of described steel ball seat lower center and described pair of metering-orifice
The upper surface of valve (9) against；Described guide holder (32) is provided with multiple intercommunicating pore (35) vertically, described guide holder for guide with
And adjust the working gas gap X1 between described high-speed electromagnetic valve (4) and armature (37)；Described armature (37) is provided with four vertically
Drag reduction hole (36)；Described return spring and adjustment pad act on mandrel upper end, by mandrel together with collar, armature, steel ball
Seat, steel ball compress with the upper surface of double metering-orifice valves together, it is achieved the sealing of high pressure fuel.
High pressure common rail electric control fuel injector the most according to claim 1 and 2, is characterized in that: described pair of metering-orifice valve (9) is split
Formula structure, including double metering-orifice valve upper bodies (91) and double metering-orifice valve lower body (92)；The upper surface of described pair of metering-orifice valve upper body (91) with
Described steel ball (34) against, described pair of metering-orifice valve upper body is provided with oil back chamber (96) and back oil road (97)；Under described pair of metering-orifice valve
Body (92) is provided with oil-feed metering-orifice (93), low pressure spill port (94) and fuel-displaced metering-orifice (95), described oil-feed metering-orifice and fuel-displaced metering-orifice
All use arranged off-centre.
High pressure common rail electric control fuel injector the most according to claim 1 and 2, is characterized in that: described control piston component (8) institute
State and control the control piston (81) that piston component (8) includes that control piston bush (83) and control piston bush inwall coordinate, described control
The lower end of piston processed by described push rod (15) and described pintle nozzle match-ing parts (2) against, described push rod is combined with pressure spring
And pad (85) (84)；Described control piston bush (83) is provided with axially disposed high-pressure oil duct (82) and low pressure back oil road
(86), the upper end of described control piston (81) is for controlling chamber (87), and described pair of metering-orifice valve (9) is used for controlling described control chamber (87)
Fuel pressure characteristic.
High pressure common rail electric control fuel injector the most according to claim 1 and 2, is characterized in that: described pintle nozzle match-ing parts (2) includes pin
Valve body (21) and matched needle-valve (22)；Described needle-valve and described push rod (15) against.
High pressure common rail electric control fuel injector the most according to claim 1 and 2, is characterized in that: the height of described push rod (15) is
7mm, a diameter of 8mm.
High pressure common rail electric control fuel injector the most according to claim 2, is characterized in that: described mandrel (30) is divided into from top to bottom
A, B, C, D tetra-sections, and outside diameter increases the most successively；Wherein: the outside diameter of A section is minimum, described adjustment pad
And return spring (39) coordinates location with A section (38)；The outside diameter of B section less than the outside diameter of C section, described collar (31) and
Armature (37) coordinates location with B section；The outside diameter of D section, more than the outside diameter of C section, is used for controlling the stroke of mandrel (30)
X2。
High pressure common rail electric control fuel injector the most according to claim 4, is characterized in that: described control piston (81) uses little height
Degree, wide-angle structure, its height is 20mm, and a diameter of 6mm, to alleviate sole mass；Its head angle is for using 175 °, effectively
Reduce the volume in the control chamber (87) controlling piston upper end, improve the response speed of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671931.3A CN106089523A (en) | 2016-08-16 | 2016-08-16 | A kind of high pressure common rail electric control fuel injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610671931.3A CN106089523A (en) | 2016-08-16 | 2016-08-16 | A kind of high pressure common rail electric control fuel injector |
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| Publication Number | Publication Date |
|---|---|
| CN106089523A true CN106089523A (en) | 2016-11-09 |
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ID=58069630
Family Applications (1)
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|---|---|---|---|
| CN201610671931.3A Pending CN106089523A (en) | 2016-08-16 | 2016-08-16 | A kind of high pressure common rail electric control fuel injector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523223A (en) * | 2017-01-18 | 2017-03-22 | 哈尔滨工程大学 | Micro-dynamic oil return resonance bypass type electronic control oil injector |
| CN107100771A (en) * | 2017-05-15 | 2017-08-29 | 重庆红江机械有限责任公司 | A kind of new micro- spray common-rail injector |
| CN107514328A (en) * | 2017-09-27 | 2017-12-26 | 重庆红江机械有限责任公司 | A kind of micro- spray electric-controlled fuel injector for dual fuel engine |
| CN113790116A (en) * | 2021-09-14 | 2021-12-14 | 哈尔滨工程大学 | Electric control high-pressure common rail oil injector capable of realizing variable oil injection rule |
| CN114017229A (en) * | 2021-12-10 | 2022-02-08 | 北油电控燃油喷射系统(天津)有限公司 | Low-inertia oil sprayer of common rail type oil spraying system |
| CN114076058A (en) * | 2021-12-15 | 2022-02-22 | 北油电控燃油喷射系统(天津)有限公司 | Large-flow oil injector with central solenoid valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106523223A (en) * | 2017-01-18 | 2017-03-22 | 哈尔滨工程大学 | Micro-dynamic oil return resonance bypass type electronic control oil injector |
| CN107100771A (en) * | 2017-05-15 | 2017-08-29 | 重庆红江机械有限责任公司 | A kind of new micro- spray common-rail injector |
| CN107514328A (en) * | 2017-09-27 | 2017-12-26 | 重庆红江机械有限责任公司 | A kind of micro- spray electric-controlled fuel injector for dual fuel engine |
| CN107514328B (en) * | 2017-09-27 | 2023-12-08 | 重庆红江机械有限责任公司 | Micro-injection electric control fuel injector for dual-fuel engine |
| CN113790116A (en) * | 2021-09-14 | 2021-12-14 | 哈尔滨工程大学 | Electric control high-pressure common rail oil injector capable of realizing variable oil injection rule |
| CN114017229A (en) * | 2021-12-10 | 2022-02-08 | 北油电控燃油喷射系统(天津)有限公司 | Low-inertia oil sprayer of common rail type oil spraying system |
| CN114076058A (en) * | 2021-12-15 | 2022-02-22 | 北油电控燃油喷射系统(天津)有限公司 | Large-flow oil injector with central solenoid valve |
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Application publication date: 20161109 |