CN107975450A - A kind of plunger of novel screw type control oil pump capacity - Google Patents
A kind of plunger of novel screw type control oil pump capacity Download PDFInfo
- Publication number
- CN107975450A CN107975450A CN201610914491.XA CN201610914491A CN107975450A CN 107975450 A CN107975450 A CN 107975450A CN 201610914491 A CN201610914491 A CN 201610914491A CN 107975450 A CN107975450 A CN 107975450A
- Authority
- CN
- China
- Prior art keywords
- plunger
- plunger body
- oil pump
- pump capacity
- worm gear
- 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.)
- Pending
Links
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of plunger of novel screw type control oil pump capacity.Including plunger body（1）, the plunger body（1）Plunger bushing is stretched into 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 driving device（3）Driving operating；The plunger body（1）On outer surface at least one section be in worm structure form thread segment, corresponding plunger body（1）It is externally provided with the worm gear being correspondingly arranged with the thread segment（4）, the worm gear（4）Structure type be equipped with screw thread for endoporus.Since using new worm screw, worm gear operational structure, when work, makes plunger make uniform motion up and down, and oil spout precision is effectively ensured, and each oil pump capacity is also guaranteed, and the uniformity of distributive value is consistent, has been prevented engine imperfect combustion, has been emitted rear cigarette phenomenon.
Description
Technical field
The present invention relates to a kind of plunger of novel screw type control oil pump capacity, belong to engine part technical field, especially
It is related to engine fuel injection system technical field.
Background technology
The economy and power performance of engine are mainly shown as the accuracy of the fuel injection system of automobile and its reliable
Property, the plunger bushing of fuel injection system is 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
Shape and the motion mode for going out oil groove relative dimensions and the course of work.
Mechanical fuel oil ejector principle at present：With the eccentric cam and the action principle of plunger spring on camshaft, compel
Plunger is set to pump, so as to complete pump oil task.Pump oil process can be divided into three phases：
Oil inlet process
After the projection portion of cam turns round, under spring force, plunger moves 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, is filled in the oil duct of oil pump upper body
Diesel oil enters pump oil room, plunger motion to lower dead center through oilhole, and oil inlet terminates.
Fuel injection system
When camshaft go to cam projection portion jack up roller body when, plunger spring is compressed, and plunger moves upwards, fuel oil by
Pressure, a part of fuel oil flow 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
The fit clearance very little of plunger and sleeve（0.0015-0.0025mm）Make the pump oil room of plunger head become a seal oil chamber,
Plunger continues to rise, and the indoor oil pressure of pump oil raises rapidly, pump oil pressure>During oil outlet valve spring power+high-pressure oil pipe residual compression,
Push delivery valve open, high-pressure diesel enters high-pressure oil pipe through delivery valve, 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 oil return hole on sleeve, pump oil room is low
Pressure oil road is just linked up with the mesoporous and radial hole and skewed slot of plunger head, and oil pressure declines suddenly, effect of the delivery valve in spring force
Lower rapid closing, fuel cut-off.This back-plunger also wants uplink, after the projection portion of cam turns round, under the action of the spring,
Plunger and downlink.Next circulation is just started at this time.
Conclusion：By discussed above, following results and shortcoming are drawn：
1. piston reciprocation movement total kilometres L is constant, determined by the lift of cam.（Cam wear）
2. the fuel delivery size that plunger often circulates depends on delivery stroke, delivery stroke is variable from camshaft control.
3. fuel feeding start time does not change with the change of delivery stroke.
End the moment 4. rotary plunger can change fuel feeding, so as to change fuel delivery.
5. when engine impact speed makes cam faster rotational speed, oil pump capacity increases, and causes over-emitting black exhaust, incomplete combustion etc..
The content of the invention
The present invention chats offer one kind for more than and makees up and down at the uniform velocity, can accurately control using worm gear structure control plunger
New construction, the high-precision plunger of fuel delivery size processed.
The technical solution adopted by the present invention is for this：The present invention includes plunger body（1）, the plunger body（1）One end is stretched into
Plunger bushing（2）It is interior and by the plunger bushing（2）It is oriented to, the plunger body（1）The other end is by driving device（3）Driving operating；
The plunger body（1）On outer surface at least one section be in worm structure form thread segment, corresponding plunger body（1）Outside
Equipped with the worm gear being correspondingly arranged with the thread segment（4）, the worm gear（4）Structure type be equipped 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）Both ends are connected.
The driving device（3）For servomotor.
The worm gear（4）Surface is equipped with lubricating oil fuel feed hole（41）.
The fuel feed hole（41）Set diagonally downward in 60 degree.
It is an advantage of the invention that：Since using new worm screw, worm gear operational structure, when work, makes plunger make up and down at the uniform velocity
Movement, oil spout precision is effectively ensured, and each oil pump capacity is also guaranteed, and the uniformity of distributive value is consistent, prevents
Engine imperfect combustion, emit rear cigarette phenomenon.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
1 it is plunger body in figure, 2 be plunger bushing, 3 be driving device, 4 is worm gear；
41 be fuel feed hole.
Embodiment
The present invention includes plunger body 1, and described 1 one end of plunger body is stretched into plunger bushing 2 and is oriented to by the plunger bushing 2, institute
State 1 other end of plunger body and operating is driven by driving device 3；
At least one section is the thread segment in worm structure form on 1 outer surface of plunger body, and corresponding plunger body 1 is externally provided with
The worm gear 4 being correspondingly arranged with the thread segment, the structure type of the worm gear 4 are equipped 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 plunger body 1, the screw thread
Section and 1 both ends of plunger body are connected.
The driving device 3 is servomotor.
4 surface of worm gear is equipped with lubricating oil fuel feed hole 41.
The fuel feed hole 41 is set diagonally downward in 60 degree.
The present invention eliminates original cam operational structure, is designed as new worm screw, worm gear operational structure, and when work makes plunger
Body 1 makees uniform motion up and down, solves the problem that delivery stroke controls from camshaft.
The present invention the course of work be：
New structure plunger body 1 that rod end is spiral lamination is steadily driven when servomotor obtains CRANK PULSES, is high with worm gear 4
Precision is oriented to, and steadily, is uniformly made upper and lower work, is completed pump oil task.
Claims (5)
1. a kind of plunger of novel screw type control oil pump capacity, it is characterised in that including plunger body（1）, the plunger body（1）One
Plunger bushing is stretched at end（2）It is interior and by the plunger bushing（2）It is oriented to, the plunger body（1）The other end is by driving device（3）Driving fortune
Turn；
The plunger body（1）On outer surface at least one section be in worm structure form thread segment, corresponding plunger body（1）Outside
Equipped with the worm gear being correspondingly arranged with the thread segment（4）, the worm gear（4）Structure type be equipped with screw thread for endoporus.
A kind of 2. plunger of novel screw type control oil pump capacity according to claim 1, 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.
A kind of 3. plunger of novel screw type control oil pump capacity according to claim 1, it is characterised in that the driving dress
Put（3）For servomotor.
A kind of 4. plunger of novel screw type control oil pump capacity according to claim 1, it is characterised in that the worm gear
（4）Surface is equipped with lubricating oil fuel feed hole（41）.
A kind of 5. plunger of novel screw type control oil pump capacity according to claim 4, 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 |
|---|---|---|---|
| CN201610914491.XA CN107975450A (en) | 2016-10-21 | 2016-10-21 | A kind of plunger of novel screw type control oil pump capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610914491.XA CN107975450A (en) | 2016-10-21 | 2016-10-21 | A kind of plunger of novel screw type control oil pump capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107975450A true CN107975450A (en) | 2018-05-01 |
Family
ID=62004326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610914491.XA Pending CN107975450A (en) | 2016-10-21 | 2016-10-21 | A kind of plunger of novel screw type control oil pump capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107975450A (en) |
-
2016
- 2016-10-21 CN CN201610914491.XA patent/CN107975450A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104791211B (en) | Electromagnetic type variable cam mechanism and little pulsation variable-flow fueller | |
| CN104612962A (en) | Variable-displacement piston oil delivery pump and variable-flow low-pressure oil supplying device | |
| CN104061099A (en) | Energy-saving engine fuel injection pump plunger | |
| CN203962260U (en) | Energy-saving injection pump of engine plunger | |
| CN204591609U (en) | Electromagnetic type variable cam mechanism and little pulsation variable-flow oil supplying device | |
| US4052963A (en) | Internal combustion engine for combustion of powdered solid fuel | |
| CN107975450A (en) | A kind of plunger of novel screw type control oil pump capacity | |
| CN206190443U (en) | Novel plunger of spiral control oil pump capacity | |
| US1557710A (en) | Internal-combustion engine | |
| CN101387276B (en) | Axial plunger type high voltage common rail pump | |
| US2398834A (en) | Fuel injection in internalcombustion engines | |
| CN202690286U (en) | Oil supply advance angle regulating device for single-cylinder diesel oil spray pump | |
| CN203452954U (en) | Radial plunger oil feeding pump applied to high-pressure common-rail fuel injection system | |
| JP6497594B2 (en) | Oil tank piston of fuel injection pump | |
| CN204436778U (en) | Variable-displacement piston type fuel supply pump and variable-flow low-pressure oil supply device | |
| CN102767454A (en) | Fuel supply advance angle regulation device for fuel injection pump of single-cylinder diesel engine | |
| JPS6010181B2 (en) | distribution type fuel injection pump | |
| CN205135793U (en) | Rotary engine | |
| RU2587516C1 (en) | Method of internal combustion engine reversing starter mechanism and hydraulic drive system two valve gas distributor with charging of pneumatic accumulator into fluid from compensating hydraulic accumulator | |
| CN107100772B (en) | A kind of servo motor pump of car combustion engine high pressure co-rail system | |
| CN207777005U (en) | A kind of diesel injection system | |
| CN201269178Y (en) | Axial plunger type high-tension co-rail pump | |
| RU2594829C1 (en) | Method for reversing internal combustion engine by reversing starter mechanism and pneumatic drive system of two-valve gas distributor, with charging pneumatic accumulator system using gas from compensating pneumatic accumulator | |
| CN204572198U (en) | Reciprocating piston type internal combustion fluid power motor | |
| US2703076A (en) | Valve hydraulic control device for internal-combustion engines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180501 |