CN206129468U - Automatically controlled VE pump - Google Patents
Automatically controlled VE pump Download PDFInfo
- Publication number
- CN206129468U CN206129468U CN201621004205.8U CN201621004205U CN206129468U CN 206129468 U CN206129468 U CN 206129468U CN 201621004205 U CN201621004205 U CN 201621004205U CN 206129468 U CN206129468 U CN 206129468U
- Authority
- CN
- China
- Prior art keywords
- oil circuit
- piston
- timing
- automatically controlled
- advance device
- 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.)
- Withdrawn - After Issue
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- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses an automatically controlled VE pump, including the pump body, in advance ware piston, right time solenoid valve and ware spring in advance, wherein, be equipped with in the pump body and be used for placing the first cavity of ware piston advances, be located the both ends that advance the ware piston in the first cavity and form high -pressure space and low pressure space respectively, be equipped with an intercommunication oil circuit and a general between high -pressure space and the low pressure space the solenoid valve in right time of intercommunication oil circuit intercommunication or disconnection. The utility model discloses the low pressure chamber end pressure power that can make automatically controlled VE pump is close to the incomplete residual pressure of high pressure chest end power, makes piston displacement reach 0 to make the fuel feeding control range expansion in right time.
Description
Technical field
This utility model belongs to automatically controlled VE oil pump feeds timing system field, the pump assembly be mainly used in III stage of non-rice habitats and
IV stage electromotor.
Background technology
As the electromotor in II stage of non-rice habitats state adopts simplex pump or inline pump, and as Chinese Ministry of Environmental Protection plans October in this year
Part will carry out III stage emission regulation of non-rice habitats state, and former injection pump can not meet emission regulation demands, need to use automatically controlled VE pumps
Abgasgesetz could be met Deng injection system.
In a kind of automatically controlled VE pumps, piston of timing advance device left end is connected with oil pump oil-in by pump housing oil duct at present, herein pressure
Equal to input pressure, pressure is relatively low.Piston of timing advance device right-hand member is connected with pump chamber by the aperture on piston of timing advance device, pressure compared with
It is high.A certain position of the piston of timing advance device under the collective effect of spring force and hydraulic coupling in pump housing plunger shaft, piston position
Change.Timing electromagnetic valve passes through oil circuit and oil circuit connects piston pressure at two ends chamber respectively, in high pressure chest
Fuel oil flow to low pressure chamber via timing electromagnetic valve.Controller changes fuel flow by controlling timing electromagnetic valve, and scalable is high
Fuel pressure is surveyed in pressure chamber, changes piston position, so as to play a part of to control injection timing.Stroke sensor can be by the position of piston
Shifting feeds back to controller.
Throttling stopple in oil circuit reduces can piston position fluctuation, the effect for keeping fuel injection timing stable.With turn
The rising of speed, pump chamber pressure rise；Even if now timing electromagnetic valve is fully open, due to the section of throttle stopple and timing electromagnetic valve
Stream is acted on, and high pressure chest end has residual pressure, makes the piston position cannot be to 0；If by increasing adjust pad thickness, although
Can ensure when rotating speed is high that piston position can control 0, but the pressure at high pressure chest end will overcome higher in low speed
Spring force, low-speed performance can be affected.So the controlled range of whole fuel injection timing is restricted.
Utility model content
For above-mentioned technical problem, the utility model proposes a kind of automatically controlled VE pumps, are just increasing the oil spout of automatically controlled VE pumps
When span of control, improve engine performance.
In order to realize above-mentioned technical purpose, this utility model is adopted the following technical scheme that：
A kind of automatically controlled VE pumps, including the pump housing, piston of timing advance device, timing electromagnetic valve and advance device spring, wherein, pump
It is provided with for placing the two ends point that piston of timing advance device is located in the first cavity of the piston of timing advance device, first cavity in vivo
Not Xing Cheng high-pressure space and low-voltage space, oil circuit and is communicated between high-pressure space and low-voltage space by the connection
The timing electromagnetic valve of oil communication or disconnection；The connection oil circuit includes the first oil circuit and the second oil circuit, the timing electromagnetic valve
It is connected by the first oil circuit between high-pressure space, is connected by the second oil circuit between the timing electromagnetic valve and low-voltage space,
It is connected by the 3rd oil circuit between the low-voltage space and fuel feed hole on the pump housing；Characterized in that, being provided with first oil circuit
First throttle stopple, is provided with the second throttle orifice plug in the 3rd oil circuit.
The pore diameter range of the first throttle stopple is 0.5mm ~ 1mm.
The pore diameter range of the second throttle orifice plug is 0.5mm ~ 1mm.
The pump housing is provided with for installing the second cavity of the timing electromagnetic valve, the chamber axis of second cavity
It is mutually perpendicular to the chamber axis of the first cavity.
Two ends on the pump housing positioned at piston of timing advance device are respectively provided with advancing device lid and stroke sensor, advancing device lid with
Advance device spring is connected between piston of timing advance device.
Adjust pad is provided between the inwall and advance device spring of the advancing device lid.
The centre bore of the piston of timing advance device is connected with high-pressure space by connecting aperture.
Compared to a kind of existing automatically controlled VE pumps, the beneficial effects of the utility model are：
A kind of automatically controlled VE pumps of this utility model compare original a kind of automatically controlled VE pumps in piston lower pressure chamber and oil-in
The second throttle orifice plug is increased on the oil circuit of connection.When timing electromagnetic valve power-off, when completely closing, the first oil circuit and second oily
No flow in road, now the second throttle orifice plug do not work, low pressure cavity pressure is equal to input pressure, and piston displacement is maximum, supplies
Oily timing is maximum；When timing electromagnetic valve is fully opened, the first oil circuit and the second oil circuit fuel flow reach maximum, now flow through
The flow of the second throttle orifice plug and first throttle stopple is identical, the aperture of the stopple that throttled by optimization design, can be made low
Pressure chamber end pressure is close to high pressure chest end residual pressure, makes piston displacement reach 0, so that the span of control of fuel injection timing expands
Greatly.
Description of the drawings
Structural representations of the Fig. 1 for this utility model stroke sensor automatically controlled VE pumps in low pressure chamber；
Structural representations of the Fig. 2 for stroke sensor automatically controlled VE pumps in high pressure chest；
Fig. 3 is the automatically controlled VE pumps timing controlled range figure of former scheme；
Fig. 4 is the automatically controlled VE pumps timing controlled range figure of this utility model.
Wherein, 1, the pump housing；2nd, piston of timing advance device；3rd, stroke sensor；4th, first throttle stopple；5th, timing electromagnetic valve；6、
Advance device spring；7th, adjust pad；8th, advancing device lid；9th, the second throttle orifice plug；10th, the first oil circuit；11st, the second oil circuit；12nd,
Three oil circuits.
Specific embodiment
As depicted in figs. 1 and 2, a kind of automatically controlled VE pumps, including the pump housing 1, piston of timing advance device 2, timing electromagnetic valve 5 and
Advance device spring 6, wherein, it is provided with the pump housing 1 for placing the first cavity of the piston of timing advance device 2, in first cavity
High-pressure space and low-voltage space are formed respectively positioned at the two ends of piston of timing advance device 2, the company of being provided between high-pressure space and low-voltage space
Logical oil circuit and one by it is described connection oil communication or disconnection timing electromagnetic valve 5；The connection oil circuit includes the first oil circuit 10
With the second oil circuit 11, it is connected by the first oil circuit 10 between the timing electromagnetic valve 5 and high-pressure space, the timing electromagnetic valve 5
It is connected by the second oil circuit 11 between low-voltage space, on the low-voltage space and the pump housing 1, between fuel feed hole, passes through the 3rd oil circuit
12 are connected；First throttle stopple 4 is provided with first oil circuit 10, in the 3rd oil circuit 12, the second throttle orifice plug 9 is provided with.
Used as the further improvement of technical solutions of the utility model, the pump housing 1 is provided with for installing the timing electricity
Second cavity of magnet valve 5, chamber axis and the chamber axis of the first cavity of second cavity are mutually perpendicular to.This design makes
1 symmetrical configuration of pump body, compact, die casting usability is good.
As the further improvement of technical solutions of the utility model, positioned at the two ends of piston of timing advance device 2 point on the pump housing 1
Not She Zhi advancing device lid 8 and stroke sensor 3, advance device spring 6 is connected between advancing device lid 8 and piston of timing advance device 2.In advance
Device spring 6 is installed on the survey of 2 low pressure chamber of piston of timing advance device, and spring force can be offset the spring force with high pressure chest end, be made advancing device live
Plug 2 is stable in a certain position；
Advancing device lid 8 has two kinds, low pressure chamber end（Band spring base, aluminum component）With high pressure chest end（Without spring base, steel part）；Stroke
Sensor 3 also has two kinds, low pressure chamber end（Band spring base）, high pressure chest end（Spring base）；Select low pressure chamber or high pressure chest stroke
Installation site of the sensor 3 according to oil pump on the engine determines that opposite side is corresponding advancing device lid 8, it is ensured that sensor exists
On the outside of electromotor, in order to avoid install interfere.
As the further improvement of technical solutions of the utility model, the inwall and advance device spring 6 of the advancing device lid 8 it
Between be provided with adjust pad 7.The pretightning force for selecting suitable spacer thickness to ensure advance device spring 6 can be passed through, manufacturing tolerance is compensated,
Parts machining precision is reduced, while in turn ensure that the concordance of oil pump performance.
Used as the further improvement of technical solutions of the utility model, the centre bore of the piston of timing advance device 2 is little by connecting
Hole is connected with high-pressure space.The connection aperture has the effect that：
Firstth, make piston of timing advance device 2 connect with pump chamber, pressure source is provided for advancing device high pressure chest end；
Secondth, filter action, reduce 2 high pressure chest of piston of timing advance device in pressure oscillation, it is ensured that 2 position of piston of timing advance device it is steady
It is fixed.
3rd, throttling action, it is ensured that advancing device high pressure cavity pressure can be controlled.
This utility model makes automatically controlled VE oil pump feeds timing control expanded range, makes diesel engine in high rotating speed underload situation
Under, reduce fuel injection timing, effectively reduce the discharge of pollutant NOx.
Fig. 3 and Fig. 4 give new and old two span of control comparison diagrams, and by the effect of the stopple 9 that throttles, fuel injection timing is in height
It is greatly improved during rotating speed.
Claims (7)
1. a kind of automatically controlled VE pumps, it is characterised in that including the pump housing, piston of timing advance device, timing electromagnetic valve and advance device spring, its
In, it is provided with the pump housing and be located in the first cavity of the piston of timing advance device, first cavity piston of timing advance device for places
Two ends form high-pressure space and low-voltage space respectively, are communicated with oil circuit and by institute between high-pressure space and low-voltage space
State the timing electromagnetic valve of connection oil communication or disconnection；The connection oil circuit includes the first oil circuit and the second oil circuit, the timing
It is connected by the first oil circuit between electromagnetic valve and high-pressure space, between the timing electromagnetic valve and low-voltage space, passes through the second oil circuit
It is connected, is connected by the 3rd oil circuit between the low-voltage space and fuel feed hole on the pump housing；Characterized in that, in first oil circuit
First throttle stopple is provided with, in the 3rd oil circuit, the second throttle orifice plug is provided with.
2. automatically controlled VE pumps according to claim 1, it is characterised in that the pore diameter range of the first throttle stopple is
0.5mm~1mm。
3. automatically controlled VE pumps according to claim 1, it is characterised in that the pore diameter range of the second throttle orifice plug is
0.5mm~1mm。
4. automatically controlled VE pumps according to claim 1, it is characterised in that the pump housing is provided with for installing the timing electricity
Second cavity of magnet valve, chamber axis and the chamber axis of the first cavity of second cavity are mutually perpendicular to.
5. automatically controlled VE pumps according to claim 1, it is characterised in that positioned at the two ends of piston of timing advance device point on the pump housing
Not She Zhi advancing device lid and stroke sensor, be connected with advance device spring between advancing device lid and piston of timing advance device.
6. automatically controlled VE pumps according to claim 3, it is characterised in that the inwall of the advancing device lid and advance device spring it
Between be provided with adjust pad.
7. automatically controlled VE pumps according to claim 1, it is characterised in that the centre bore of the piston of timing advance device is little by connecting
Hole is connected with high-pressure space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621004205.8U CN206129468U (en) | 2016-08-31 | 2016-08-31 | Automatically controlled VE pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621004205.8U CN206129468U (en) | 2016-08-31 | 2016-08-31 | Automatically controlled VE pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206129468U true CN206129468U (en) | 2017-04-26 |
Family
ID=58568678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621004205.8U Withdrawn - After Issue CN206129468U (en) | 2016-08-31 | 2016-08-31 | Automatically controlled VE pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206129468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194536A (en) * | 2016-08-31 | 2016-12-07 | 南京威孚金宁有限公司 | A kind of automatically controlled VE oil pump feed timing control system |
-
2016
- 2016-08-31 CN CN201621004205.8U patent/CN206129468U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194536A (en) * | 2016-08-31 | 2016-12-07 | 南京威孚金宁有限公司 | A kind of automatically controlled VE oil pump feed timing control system |
| CN106194536B (en) * | 2016-08-31 | 2018-10-16 | 南京威孚金宁有限公司 | A kind of automatically controlled VE oil pump feeds timing control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170426 Effective date of abandoning: 20181016 |