CN206190443U - Novel plunger of spiral control oil pump capacity - Google Patents
Novel plunger of spiral control oil pump capacity Download PDFInfo
- Publication number
- CN206190443U CN206190443U CN201621141314.4U CN201621141314U CN206190443U CN 206190443 U CN206190443 U CN 206190443U CN 201621141314 U CN201621141314 U CN 201621141314U CN 206190443 U CN206190443 U CN 206190443U
- Authority
- CN
- China
- Prior art keywords
- plunger
- plunger body
- oil pump
- pump capacity
- oil
- 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.)
- Expired - Fee Related
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to a novel plunger of spiral control oil pump capacity. Including the plunger body (1), the plunger body (1) one end stretch into in plunger bushing (2) and by plunger bushing (2) direction, the plunger body (1) other end is by drive arrangement (3) drive operation, have one section screw section for being the worm structure form on the plunger body (1) surface at least, the plunger body (1) that corresponds is outer be equipped with with the screw thread section corresponds worm wheel (4) that set up, the structural style of worm wheel (4) is equipped with the screw thread for the hole. Owing to adopting neotype worm, worm wheel operation structure, the during operation makes the plunger make uniform motion from top to bottom, spouts the olein degree and is effectively guaranteed, the oil pump capacity that reaches at every turn also obtains guaranteeing, the homogeneity of distributive value is unanimous, has stopped engine incomplete combustion, has emitted back cigarette phenomenon.
Description
Technical field
The utility model is related to a kind of novel screw type to control the plunger of oil pump capacity, belongs to engine part technical field,
More particularly to engine fuel injection system technical field.
Background technology
The economy and power performance of engine are mainly shown as the accuracy and its reliability of the fuel injection system of automobile
Property, the plunger bushing of fuel injection system is arranged on total fuel pump, its installation accuracy, plunger privileged site oil injecting groove dimensional accuracy
How much determine fuel-injected accuracy and distributive value（Oil spout openings of sizes）, and determine these factors and essentially consist in plunger bushing
Profile and go out the motion mode of oil groove relative dimensions and the course of work.
Current mechanical fuel oil ejector principle：With the eccentric cam on camshaft and the action principle of plunger spring, compel
Plunger is set to pump, so as to complete pump oil task.Pump oil process can be divided into three phases：
Oil-feed process
After the bossing of cam turns round, under spring force, plunger is moved downward, plunger upper part space
（Referred to as pump oil room）Vacuum is produced, after the fuel feed hole on plunger bushing is opened in its upper end face, oil pump upper body oil is filled in
Diesel oil in road enters pump oil room through oilhole, and plunger motion to lower dead center, oil-feed terminates.
Fuel injection system
When camshaft goes to the bossing jack-up roller body of cam, plunger spring is compressed, and plunger is moved upwards, combustion
Oil is pressurized, and a part of fuel oil flows back to fuel injection pump body oil pocket through oilhole.When plunger top surface covers the upper limb of fuel feed hole on sleeve,
Due to plunger and the fit clearance very little of sleeve（0.0015-0.0025mm）Making the pump oil room of plunger head turns into a Seal Oil
Chamber, plunger continues to rise, and the oil pressure in pump oil room is raised rapidly, pump oil pressure>Oil outlet valve spring power+high-pressure oil pipe residual compression
When, push delivery valve open, high-pressure diesel enters high-pressure oil pipe through delivery valve, and combustion chamber is sprayed into by fuel injector.
Oil return process
The upward fuel feeding of plunger, when the skewed slot being up on plunger（Stop supplying side）When being communicated with the spill port on sleeve, pump oil
Room low pressure oil way is just linked up with the mesopore and radial hole and skewed slot of plunger head, and oil pressure declines suddenly, and delivery valve is in spring force
The lower rapid closing of effect, fuel cut-off.This back-plunger is also up, after the bossing of cam turns round, in the work of spring
Under, plunger is again descending.Next circulation is now just started.
Conclusion：By discussed above, following results and weak point are drawn：
1. piston reciprocation motion total kilometres L is constant, is determined by the lift of cam.（Cam wear）
2. the fuel delivery size that plunger is often circulated depends on delivery stroke, and delivery stroke is not variable by camshaft control
's.
3. fuel feeding start time do not change with the change of delivery stroke.
4. rotary plunger can change fuel feeding and end the moment, so as to change fuel delivery.
5. when engine impact speed makes cam faster rotational speed, oil pump capacity increase, over-emitting black exhaust, incomplete combustion etc. are caused.
Utility model content
The utility model is chatted offer one kind for more than and is made up and down at the uniform velocity using worm gear structure control plunger, can be accurate
Really control new construction, the high-precision plunger of fuel delivery size.
For this technical solution adopted in the utility model is：The utility model includes plunger body（1）, the plunger body（1）
Stretch into plunger bushing in one end（2）It is interior and by the plunger bushing（2）It is oriented to, the plunger body（1）The other end is by drive device（3）Drive
Operating；
The plunger body（1）At least one section is the thread segment in worm structure form, corresponding plunger body on outer surface
（1）It is externally provided with the worm gear being correspondingly arranged with the thread segment（4）, the worm gear（4）Structure type be provided with screw thread for endoporus.
The thread segment is independently of plunger body（1）Set, the thread segment is arranged on the plunger body（1）Middle part, it is described
Thread segment and plunger body（1）Two ends are connected.
The drive device（3）It is servomotor.
The worm gear（4）Surface is provided with lubricating oil fuel feed hole（41）.
The fuel feed hole（41）Set diagonally downward in 60 degree.
The utility model has the advantages that：It is upper and lower due to using new worm screw, worm gear operational structure making, during work plunger
Uniform motion, oil spout precision is effectively ensured, and each oil pump capacity is also guaranteed, and the uniformity of distributive value is consistent, Du
Absolutely engine imperfect combustion, emit rear cigarette phenomenon.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure 1 be plunger body, 2 be plunger bushing, 3 be drive device, 4 be worm gear；
41 is fuel feed hole.
Specific embodiment
The utility model includes plunger body 1, and the one end of the plunger body 1 is stretched into plunger bushing 2 and led by the plunger bushing 2
To the other end of the plunger body 1 drives operating by drive device 3；
At least one section is the thread segment in worm structure form on the outer surface of the plunger body 1, outside corresponding plunger body 1
It is provided with the worm gear 4 being correspondingly arranged with the thread segment, the structure type of the worm gear 4 is provided with screw thread for endoporus.
The thread segment is set independently of plunger body 1, and the thread segment is arranged on the middle part of the plunger body 1, the screw thread
Section and the two ends of plunger body 1 are connected.
The drive device 3 is servomotor.
The surface of the worm gear 4 is provided with lubricating oil fuel feed hole 41.
The fuel feed hole 41 is set diagonally downward in 60 degree.
The utility model eliminates original cam operational structure, is designed as new worm screw, worm gear operational structure, makes during work
Plunger body 1 makees upper and lower uniform motion, solves delivery stroke not by the problem of camshaft control.
The course of work of the present utility model is：
It is steady when servomotor obtains CRANK PULSES to drive rod end for the new structure plunger body 1 of spiral lamination, with worm gear 4
For high accuracy is oriented to, steadily, uniformly make upper and lower work, complete pump oil task.
Claims (5)
1. a kind of novel screw type controls the plunger of oil pump capacity, it is characterised in that including plunger body（1）, the plunger body（1）One
Stretch into plunger bushing in end（2）It is interior and by the plunger bushing（2）It is oriented to, the plunger body（1）The other end is by drive device（3）Drive fortune
Turn；
The plunger body（1）At least one section is the thread segment in worm structure form, corresponding plunger body on outer surface（1）Outward
It is provided with the worm gear being correspondingly arranged with the thread segment（4）, the worm gear（4）Structure type be provided with screw thread for endoporus.
2. a kind of novel screw type according to claim 1 controls the plunger of oil pump capacity, it is characterised in that the thread segment
Independently of plunger body（1）Set, the thread segment is arranged on the plunger body（1）Middle part, the thread segment and plunger body（1）Two
End is connected.
3. a kind of novel screw type according to claim 1 controls the plunger of oil pump capacity, it is characterised in that the driving dress
Put（3）It is servomotor.
4. a kind of novel screw type according to claim 1 controls the plunger of oil pump capacity, it is characterised in that the worm gear
（4）Surface is provided with lubricating oil fuel feed hole（41）.
5. a kind of novel screw type according to claim 4 controls the plunger of oil pump capacity, it is characterised in that the fuel feed hole
（41）Set diagonally downward in 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621141314.4U CN206190443U (en) | 2016-10-21 | 2016-10-21 | Novel plunger of spiral control oil pump capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621141314.4U CN206190443U (en) | 2016-10-21 | 2016-10-21 | Novel plunger of spiral control oil pump capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206190443U true CN206190443U (en) | 2017-05-24 |
Family
ID=58731723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621141314.4U Expired - Fee Related CN206190443U (en) | 2016-10-21 | 2016-10-21 | Novel plunger of spiral control oil pump capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206190443U (en) |
-
2016
- 2016-10-21 CN CN201621141314.4U patent/CN206190443U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20211021 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |