CN106194536A - A kind of automatically controlled VE oil pump feed timing control system - Google Patents
A kind of automatically controlled VE oil pump feed timing control system Download PDFInfo
- Publication number
- CN106194536A CN106194536A CN201610774035.XA CN201610774035A CN106194536A CN 106194536 A CN106194536 A CN 106194536A CN 201610774035 A CN201610774035 A CN 201610774035A CN 106194536 A CN106194536 A CN 106194536A
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- Prior art keywords
- timing
- piston
- oil
- automatically controlled
- control system
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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
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a kind of automatically controlled VE oil pump feed timing control system, including the pump housing, piston of timing advance device, timing electromagnetic valve and advance device spring, wherein, the first cavity for placing described piston of timing advance device it is provided with in the pump housing, the two ends being positioned at piston of timing advance device in described first cavity form high-pressure space and low-voltage space respectively, are communicated with oil circuit and by described connection oil communication or the timing electromagnetic valve of disconnection between high-pressure space and low-voltage space.The present invention automatically controlled VE oil pump feed timing control system can make low pressure chamber end pressure close to high pressure chest end residual pressure, makes piston displacement reach 0, so that the span of control of fuel injection timing expands.
Description
Technical field
The invention belongs to automatically controlled VE oil pump feed timing system field, this pump assembly is mainly used in non-rice habitats III stage and IV rank
Section electromotor.
Background technology
Owing to the electromotor in non-rice habitats state II stage uses simplex pump or inline pump, and along with Chinese Ministry of Environmental Protection plans October in this year
Part non-rice habitats state III to be carried out stage emission regulation, former injection pump can not meet emission regulation demands, need to use automatically controlled VE pump
Abgasgesetz could be met Deng injection system.
In current automatically controlled VE oil pump feed timing control system, piston of timing advance device left end is by pump housing oil duct and oil pump oil-in
Being connected, pressure is equal to input pressure herein, and pressure is relatively low.Piston of timing advance device right-hand member is by the aperture on piston of timing advance device and pump chamber
Connecting, pressure is higher.Piston of timing advance device is in a certain position of pump housing plunger shaft under the common effect of spring force and hydraulic coupling,
The change of piston position changes fuel injection timing simultaneously.Timing electromagnetic valve connects piston pressure at two ends respectively by oil circuit and oil circuit
Chamber, the fuel oil in high pressure chest flows to low pressure chamber via timing electromagnetic valve.Controller, by controlling timing electromagnetic valve, changes fuel oil stream
Amount, scalable high pressure chest is surveyed fuel pressure, is changed piston position, thus play the effect controlling injection timing.Stroke sensor
Can be by the Displacement Feedback of piston to controller.
Throttling stopple in oil circuit can make piston position fluctuation reduce, and keeps the effect that fuel injection timing is stable.Along with turning
The rising of speed, pump chamber pressure raises；Even if now timing electromagnetic valve is fully open, due to throttling stopple and the joint of timing electromagnetic valve
Stream effect, high pressure chest end has residual pressure, makes the piston position cannot be to 0；If adjusting spacer thickness by increasing, although
Can ensure that when rotating speed height piston position can control to 0, but the pressure of high pressure chest end to overcome higher when low speed
Spring force, low-speed performance can be affected.So the controlled range of whole fuel injection timing is restricted.
Summary of the invention
For above-mentioned technical problem, the present invention proposes a kind of automatically controlled VE oil pump feed timing control system, increases automatically controlled VE pump
Injection timing span of control, improve engine performance.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that
A kind of automatically controlled VE oil pump feed timing control system, including the pump housing, piston of timing advance device, timing electromagnetic valve and advancing device bullet
Spring, wherein, is provided with the first cavity for placing described piston of timing advance device in the pump housing, be positioned at advancing device and live in described first cavity
The two ends of plug form high-pressure space and low-voltage space respectively, are communicated with oil circuit, Yi Jiyi between high-pressure space and low-voltage space
By described connection oil communication or the timing electromagnetic valve of disconnection；Described connection oil circuit includes the first oil circuit and the second oil circuit, described
It is connected by the first oil circuit between timing electromagnetic valve and high-pressure space, by second between described timing electromagnetic valve and low-voltage space
Oil circuit is connected, and is connected by the 3rd oil circuit between described low-voltage space with fuel feed hole on the pump housing；It is characterized in that, described first oil
Road is provided with first throttle stopple, described 3rd oil circuit is provided with second section discharge orifice plug.
The pore diameter range of described first throttle stopple is 0.5mm ~ 1mm.
The pore diameter range of described second section discharge orifice plug is 0.5mm ~ 1mm.
The described pump housing is provided with the second cavity for installing described timing electromagnetic valve, the chamber axis of described second cavity
It is mutually perpendicular to the chamber axis of the first cavity.
Be positioned at the two ends of piston of timing advance device on the described pump housing and be respectively provided with advancing device lid and stroke sensor, advancing device lid with
Connect between piston of timing advance device and have advance device spring.
It is provided with adjustment pad between inwall and the advance device spring of described advancing device lid.
The centre bore of described piston of timing advance device is connected with high-pressure space by connection aperture.
Compared to existing automatically controlled VE oil pump feed timing control system, the invention has the beneficial effects as follows:
A kind of automatically controlled VE oil pump feed timing control system of the present invention is compared original automatically controlled VE oil pump feed timing control system and is being lived
Second section discharge orifice plug is added on the oil circuit that plug low pressure chamber is connected with oil-in.When timing electromagnetic valve power-off, when completely closing,
Not having flow in first oil circuit and the second oil circuit, now second section discharge orifice plug is inoperative, and low pressure chamber pressure is equal to input pressure,
Piston displacement is maximum, and fuel injection timing is maximum；When timing electromagnetic valve fully opens, the first oil circuit and the second oil circuit fuel flow reach
To maximum, the flow now flowing through second section discharge orifice plug and first throttle stopple is identical, by optimizing design throttling stopple
Aperture, low pressure chamber end pressure can be made close to high pressure chest end residual pressure, make piston displacement reach 0, so that fuel feeding is just
Time span of control expand.
Accompanying drawing explanation
Fig. 1 is stroke sensor of the present invention automatically controlled VE pump structure schematic diagram when low pressure chamber；
Fig. 2 is stroke sensor automatically controlled VE pump structure schematic diagram when high pressure chest；
Fig. 3 is former scheme automatically controlled VE pump timing controlled range figure；
Fig. 4 is the present invention automatically controlled VE pump timing controlled range figure.
Wherein, 1, the pump housing；2, piston of timing advance device；3, stroke sensor；4, first throttle stopple；5, timing electromagnetic valve；6、
Advance device spring；7, pad is adjusted；8, advancing device lid；9, second section discharge orifice plug；10, the first oil circuit；11, the second oil circuit；12,
Three oil circuits.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of automatically controlled VE oil pump feed timing control system, including the pump housing 1, piston of timing advance device 2, just
Time electromagnetic valve 5 and advance device spring 6, wherein, in the pump housing 1, be provided with the first cavity for placing described piston of timing advance device 2, institute
The two ends being positioned at piston of timing advance device 2 in stating the first cavity form high-pressure space and low-voltage space, high-pressure space and low pressure sky respectively
Oil circuit and one it is communicated with by described connection oil communication or the timing electromagnetic valve 5 of disconnection between；Described connection oil circuit bag
Include the first oil circuit 10 and the second oil circuit 11, be connected by the first oil circuit 10 between described timing electromagnetic valve 5 and high-pressure space, described
It is connected by the second oil circuit 11 between timing electromagnetic valve 5 and low-voltage space, logical between fuel feed hole on described low-voltage space and the pump housing 1
Cross the 3rd oil circuit 12 to be connected；Described first oil circuit 10 is provided with first throttle stopple 4, described 3rd oil circuit 12 is provided with second section
Discharge orifice plug 9.
As the further improvement of technical solution of the present invention, the described pump housing 1 is provided with for installing described timing electromagnetic valve 5
The second cavity, the chamber axis of described second cavity and the chamber axis of the first cavity are mutually perpendicular to.This design makes oil pump
The pump housing 1 symmetrical configuration, compact, die casting usability is good.
As the further improvement of technical solution of the present invention, the two ends that the described pump housing 1 is positioned at piston of timing advance device 2 set respectively
Putting advancing device lid 8 and stroke sensor 3, being connected between advancing device lid 8 with piston of timing advance device 2 has advance device spring 6.Advancing device bullet
Spring 6 is installed on piston of timing advance device 2 low pressure chamber and surveys, and spring force can be offset and the spring force of high pressure chest end, makes piston of timing advance device 2 steady
It is scheduled on a certain position；
Advancing device lid 8 has two kinds, low pressure chamber end (band spring base, aluminum component) and high pressure chest end (without spring base, steel part)；Stroke sensing
Device 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 sensing
Device 3 determines according to oil pump installation site on the engine, and opposite side is corresponding advancing device lid 8, it is ensured that sensor is starting
Outside machine, interfere in order to avoid installing.
As the further improvement of technical solution of the present invention, set between inwall and the advance device spring 6 of described advancing device lid 8
There is adjustment pad 7.The pretightning force of advance device spring 6 can be ensured by selecting suitable spacer thickness, compensate manufacturing tolerance, reduce
Parts machining precision, in turn ensure that the concordance of oil pump performance simultaneously.
As the further improvement of technical solution of the present invention, the centre bore of described piston of timing advance device 2 by connection aperture with
High-pressure space connects.Described connection aperture has the effect that
The first, make piston of timing advance device 2 connect with pump chamber, provide pressure source for advancing device high pressure chest end；
The second, filter action, reduces pressure oscillation in piston of timing advance device 2 high pressure chest, it is ensured that stablizing of piston of timing advance device 2 position.
3rd, throttling action, it is ensured that advancing device high pressure cavity pressure can control.
The present invention makes automatically controlled VE oil pump feed timing control expanded range, makes diesel engine in the case of high rotating speed underload, subtracts
Little fuel injection timing, effectively reduces the discharge of pollutant NOx.
Fig. 3 and Fig. 4 gives new and old two span of control comparison diagrams, and by the effect of the stopple 9 that throttles, fuel injection timing is at height
It is greatly improved during rotating speed.
Claims (7)
1. an automatically controlled VE oil pump feed timing control system, it is characterised in that include the pump housing, piston of timing advance device, timing electromagnetic valve
And advance device spring, wherein, it is provided with the first cavity for placing described piston of timing advance device in the pump housing, in described first cavity
The two ends being positioned at piston of timing advance device form high-pressure space and low-voltage space respectively, are communicated with between high-pressure space and low-voltage space
Oil circuit and one is by described connection oil communication or the timing electromagnetic valve of disconnection；Described connection oil circuit includes the first oil circuit and
Two oil circuits, are connected by the first oil circuit between described timing electromagnetic valve and high-pressure space, described timing electromagnetic valve and low-voltage space
Between by the second oil circuit be connected, be connected by the 3rd oil circuit between described low-voltage space with fuel feed hole on the pump housing；Its feature exists
In, described first oil circuit is provided with first throttle stopple, described 3rd oil circuit is provided with second section discharge orifice plug.
Automatically controlled VE oil pump feed timing control system the most according to claim 1, it is characterised in that described first throttle stopple
Pore diameter range be 0.5mm ~ 1mm.
Automatically controlled VE oil pump feed timing control system the most according to claim 1, it is characterised in that described second section discharge orifice plug
Pore diameter range be 0.5mm ~ 1mm.
Automatically controlled VE oil pump feed timing control system the most according to claim 1, it is characterised in that the described pump housing is provided with use
In the second cavity of the described timing electromagnetic valve of installation, the chamber axis of described second cavity and the chamber axis of the first cavity are mutual
Vertically.
Automatically controlled VE oil pump feed timing control system the most according to claim 1, it is characterised in that be positioned on the described pump housing and carry
The two ends of front device piston are respectively provided with advancing device lid and stroke sensor, and being connected between advancing device lid and piston of timing advance device has in advance
Device spring.
Automatically controlled VE oil pump feed timing control system the most according to claim 3, it is characterised in that described advancing device lid interior
Adjustment pad it is provided with between wall and advance device spring.
Automatically controlled VE oil pump feed timing control system the most according to claim 1, it is characterised in that described piston of timing advance device
Centre bore is connected with high-pressure space by connection aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774035.XA CN106194536B (en) | 2016-08-31 | 2016-08-31 | A kind of automatically controlled VE oil pump feeds timing control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774035.XA CN106194536B (en) | 2016-08-31 | 2016-08-31 | A kind of automatically controlled VE oil pump feeds timing control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106194536A true CN106194536A (en) | 2016-12-07 |
| CN106194536B CN106194536B (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610774035.XA Active CN106194536B (en) | 2016-08-31 | 2016-08-31 | A kind of automatically controlled VE oil pump feeds timing control system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1062575A (en) * | 1964-02-05 | 1967-03-22 | Cav Ltd | Liquid fuel injection pumps |
| US6237568B1 (en) * | 1998-10-10 | 2001-05-29 | Lucas Industries Plc | Fuel system |
| EP1947324A2 (en) * | 2007-01-18 | 2008-07-23 | Robert Bosch Gmbh | Fuel injector with integrated pressure intensifier |
| CN201190644Y (en) * | 2008-04-18 | 2009-02-04 | 南京威孚金宁有限公司 | Oil supply timing mechanism for electric-controlled dispensing pump |
| DE102011087086A1 (en) * | 2011-11-25 | 2013-05-29 | Robert Bosch Gmbh | Proportional valve e.g. currentless closed slide valve, for common-rail injection system for injecting fuel into combustion chamber of internal combustion engine, has inlet and outlet designed as holes, which are closed by valve element |
| CN206129468U (en) * | 2016-08-31 | 2017-04-26 | 南京威孚金宁有限公司 | Automatically controlled VE pump |
-
2016
- 2016-08-31 CN CN201610774035.XA patent/CN106194536B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1062575A (en) * | 1964-02-05 | 1967-03-22 | Cav Ltd | Liquid fuel injection pumps |
| US6237568B1 (en) * | 1998-10-10 | 2001-05-29 | Lucas Industries Plc | Fuel system |
| EP1947324A2 (en) * | 2007-01-18 | 2008-07-23 | Robert Bosch Gmbh | Fuel injector with integrated pressure intensifier |
| CN201190644Y (en) * | 2008-04-18 | 2009-02-04 | 南京威孚金宁有限公司 | Oil supply timing mechanism for electric-controlled dispensing pump |
| DE102011087086A1 (en) * | 2011-11-25 | 2013-05-29 | Robert Bosch Gmbh | Proportional valve e.g. currentless closed slide valve, for common-rail injection system for injecting fuel into combustion chamber of internal combustion engine, has inlet and outlet designed as holes, which are closed by valve element |
| CN206129468U (en) * | 2016-08-31 | 2017-04-26 | 南京威孚金宁有限公司 | Automatically controlled VE pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106194536B (en) | 2018-10-16 |
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