CN202031746U - Control valve matching component of electric control single-cylinder fuel injection pump - Google Patents

Control valve matching component of electric control single-cylinder fuel injection pump Download PDF

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Publication number
CN202031746U
CN202031746U CN2011201297731U CN201120129773U CN202031746U CN 202031746 U CN202031746 U CN 202031746U CN 2011201297731 U CN2011201297731 U CN 2011201297731U CN 201120129773 U CN201120129773 U CN 201120129773U CN 202031746 U CN202031746 U CN 202031746U
Authority
CN
China
Prior art keywords
control valve
mounting hole
pump
fuel injection
pump housing
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
Application number
CN2011201297731U
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Chinese (zh)
Inventor
鲍慧涛
李秀芹
贾生刚
吕殿祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG XINYA INDUSTRY Co Ltd
Original Assignee
SHANDONG XINYA INDUSTRY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANDONG XINYA INDUSTRY Co Ltd filed Critical SHANDONG XINYA INDUSTRY Co Ltd
Priority to CN2011201297731U priority Critical patent/CN202031746U/en
Application granted granted Critical
Publication of CN202031746U publication Critical patent/CN202031746U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a control valve matching component of an electric control single-cylinder fuel injection pump, an upper edge and a lower edge of a control valve (9) are matched with an electromagnet (4) and a lift range stop block (10) respectively, the inner diameter of a mounting hole (K) of the control valve on a pump body (1) is matched with the outer diameter of the control valve (9), and the control valve (9) is directly in matched assembly and sliding fit with the mounting hole (K) of the control valve. A chamfer angle is formed in an orifice at the bottom of the mounting hole (K) of the control valve for being used as a valve hole base surface (Z) which is further matched with a slope at the bottom of the valve body of the control valve (9). A high-pressure oil passage (L) on the pump body (1) in the axial direction penetrates the radial mounting hole (K) of the control valve and is communicated with an annular oil groove (C) on the cylindrical surface of the control valve (9). By adopting the control valve matching component, leakage in the pump can be basically avoided, the pressure at the end of the pump can be effectively improved, the matching capability is improved, the emission and the pollution are reduced, the assembly efficiency is improved, the processing cost is reduced, the service life is prolonged and the control valve matching component has good development prospects.

Description

A kind of control valve matable assembly of automatically controlled single cylinder fuel injection pump
Technical field
The utility model relates to single cylinder diesel, relates in particular to supporting single cylinder fuel injection pump.
Background technique
Single cylinder diesel is the important power source of Tendency of Agricultural Machinery in China, about about 200,000,000 of national social recoverable amount, extensive use aspect agricultural transportation, irrigation, processing of farm products.According to statistics, the diesel oil of China 2/3rds is consumed by single cylinder diesel at present.Because inadequate natural endowment, single cylinder diesel exist the oil consumption height, pollute the problem heavy, that noise is big, for a long time, saving the consumption reduction reduction of discharging is the direction of single cylinder diesel development, as " heart " of diesel engine, the improved especially emphasis of Injection Pump progressively develops to the electrical control oil spray pump direction.What existing electrical control oil spray pump adopted is split type control valve body structure, be control valve and valve pocket split setting, must earlier adopt interference fit to be installed in the control valve bore of the pump housing valve pocket, then control valve be packed in the valve pocket in the control valve bore by the lift block hole of pump housing bottom surface.The structure relative complex, that machining accuracy, quality of fit require is high, operation is many, efficient is low, radial seal between control valve and the valve pocket and the coordination between the sliding are difficult, adjust to very difficulty of perfect condition, let out in the interference fit place of valve pocket and control valve bore is easy to generate, the pump end pressure that has limited automatically controlled single cylinder fuel injection pump further improves.
Summary of the invention
The purpose of this utility model is improved on control valve that has automatically controlled single cylinder fuel injection pump now and pump housing cooperating structure exactly, simplifies manufacturing procedure, improves efficiency of assembling, reduces the pump internal leakage, improves the pump end pressure, improves matching performance.
Task of the present utility model is finished like this: the control valve matable assembly that designs a kind of automatically controlled single cylinder fuel injection pump, form by the pump housing, control valve, armature, return spring, on the modular construction basis of existing automatically controlled single cylinder fuel injection pump, improved, the bottom and upper segment of control valve is supporting with electromagnet, lift block respectively, the internal diameter of the control valve mounting hole that the spring installation cavity on the pump housing connects below is φ 7mm, be complementary with the external diameter of control valve, control valve in the pump housing directly and the supporting installing of control valve mounting hole, be slidingly matched.The bottom port place of the control valve mounting hole on the pump housing has chamfering, makes the valve opening seating plane, matches with the inclined-plane, valve body bottom of control valve.Axial high-pressure oil duct runs through control valve mounting hole radially on the pump housing, is connected with endless-oil groove on the control valve external cylindrical surface in the control valve mounting hole.Through above-mentioned improvement, removed existing structure equipped with the interference of pump housing control valve bore, with the valve pocket that control valve is slidingly matched, control valve bore is dwindled, and directly is slidingly matched with control valve, has reduced manufacturing procedure, has improved efficiency of assembling.
Manufacture experimently, test according to technique scheme, prove of the present utility model reasonable in design, simplify the structure, removed valve pocket, stopped the pump internal leakage that valve pocket and control valve bore interference fit cause, can improve the pump end pressure effectively, improve matching performance, reduce pollution emissions, improve efficiency of assembling, cut down finished cost, reached predetermined purpose preferably.
Description of drawings
Fig. 1 is a supporting structural representation of the present utility model;
Fig. 2 is the pump housing 1 of the present utility model and control valve 9 cooperating structure schematic representation;
Fig. 3 is the structural representation of the pump housing 1 of the present utility model.
Among the figure, the 1-pump housing, 2-dividing plate, 3-armature, 4-electromagnet, 5-armature screw, 6-spring stop, 7-return spring, 8-spring pedestal, 9-control valve, 10-lift block, 11-pump pressure lid; The F-plunger cavity, L-high-pressure oil duct, H-spring installation cavity, K-control valve mounting hole, D-low pressure oil pocket, J-throttle bore, C-endless-oil groove, Z-valve opening seating plane, S-lift block chamber.
Embodiment
Below in conjunction with accompanying drawing mode of execution of the present utility model is illustrated.
Consult Fig. 1, Fig. 2, the pump housing 1 top installing electromagnet 4, be connected with the pump housing 1 by dividing plate 2, installing armature 3 in the center hole of dividing plate 2, be fixed on the top of control valve 9 by armature screw 5, be communicated with spring installation cavity H on the pump housing 1, return spring 7 is around the epimere of control valve 9, be installed in the spring installation cavity H, the top of return spring 7 and bottom are sealed by spring stop 6 and spring pedestal 8 respectively.The hypomere of control valve 9 is installed in the control valve mounting hole K below the spring installation cavity H, and the external cylindrical surface of control valve 9 directly cooperates with control valve mounting hole K.The bottom surface of control valve 9 is withstood by the lift block 10 that is installed in the low pressure oil pocket D, and 11 shutoff are covered by the pump pressure of the fixing installing in the pump housing 1 bottom surface in lift block 10 bottom surfaces.Axial plunger cavity F is communicated with throttle bore J by high-pressure oil duct L on the pump housing 1, and high-pressure oil duct L runs through control valve mounting hole K radially, is communicated with endless-oil groove C on control valve 9 cylndrical surface.
Consult Fig. 3, an end of the pump housing 1 is communicated with high-pressure oil duct L by plunger cavity F, runs through control valve mounting hole K radially, is communicated with the throttle bore J of the pump housing 1 the other end; The top mouth of control valve mounting hole K radially is communicated with spring installation cavity H, and the bottom surface is communicated with low pressure oil pocket D and lift block chamber S.The place, aperture, bottom surface of the control valve mounting hole K that is connected with low pressure oil pocket D has valve opening seating plane Z, cooperates with the inclined-plane, valve body bottom of control valve 9.During assembling, control valve 9 enters the pump housing 1 from the lift block chamber S of the pump housing 1 bottom surface, pass low pressure oil pocket D, be installed in the control valve mounting hole K, the epimere of control valve 9 stretches in the spring installation cavity H, the hypomere valve body directly cooperates with control valve mounting hole K, and the endless-oil groove C on the control valve 9 hypomere cylndrical surface is communicated with the high-pressure oil duct L of the pump housing 1.
When the utility model and automatically controlled single cylinder fuel injection pump are supporting, control valve 9 directly with the pump housing 1 on control valve mounting hole K cooperate installing.Plunger is when the operation of the inner of the pump housing 1, electromagnet 4 energisings, armature 3 upwards adhesives with control valve 9 tops, control valve 9 is upwards mentioned, endless-oil groove C on the valve body external diameter is communicated with fully with the high-pressure oil duct L of the pump housing 1, fuel oil passes control valve mounting hole K and forms high pressure, and the oil sprayer that connects by oil pipe is to the cylinder injection high pressure oil.Plunger is when the operation of the outer end of the pump housing 1, electromagnet 4 outages, return spring 7 downward top control valves 9, control valve 9 is downward, the bottom is dropped on the top of lift block 10, the gap of exposing 0.2mm between the mouth at the bottom of endless-oil groove C on control valve 9 cylndrical surface and the control valve mounting hole K, and fuel oil is from high-pressure oil duct L inflow control valve mounting hole K, endless-oil groove C by control valve 9 flows into low pressure oil pocket D, gets back to fuel tank by oil pipe again.So just can not form high pressure, can not be to cylinder fuel injection.Circulation so continuously is through electromagnet 4 energisings, outage; Armature 3 is mentioned, is put down; The process that control valve 9 rises, descends constantly hockets the high-pressure injection of fuel oil and low pressure oil return, forms pulsed oil spout state and transports to oil sprayer, provides fuel oil to cylinder.
The mode of structure that the utility model adopts control valve 9 and control valve mounting hole K directly to cooperate, substantially stopped the pump internal leakage, the pump end pressure reaches as high as 120MPa, and the fuel oil consumption is 220g/kWh, reaches the standard of the specific fuel consumption≤230g/kWh of national second generation single cylinder engine.Noise reduces, and total discharging reaches the set quota of U.S. EPA emission standard CO≤6.6g/kWh, HC+NOx≤0.8g/kWh, and matching performance obviously improves.And fuel injection pulsewidth significantly reduces, and reduced the wearing and tearing of movable matching partss such as control valve 9, plunger, tappet body, prolonged the working life of related components.Reduced manufacturing procedure simultaneously, simplified assembly technology, improved manufacturing efficiency, reduced cost of production, remarkable economic and social benefits has bright development prospect.

Claims (3)

1. the control valve matable assembly of an automatically controlled single cylinder fuel injection pump, by the pump housing (1), control valve (9), armature (3), return spring (7) is formed, on the modular construction basis of existing automatically controlled single cylinder fuel injection pump, improved, the bottom and upper segment of control valve (9) respectively with electromagnet (4), lift block (10) is supporting, the internal diameter that it is characterized in that the control valve mounting hole (K) that the spring installation cavity (H) on the pump housing (1) connects below is φ 7mm, be complementary with the external diameter of control valve (9), control valve (9) is the direct and supporting installing of control valve mounting hole (K) in the pump housing (1), be slidingly matched.
2. according to the control valve matable assembly of the described automatically controlled single cylinder fuel injection pump of claim 1, the bottom port place that it is characterized in that the control valve mounting hole (K) on the said pump housing (1) has chamfering, make valve opening seating plane (Z), match with the inclined-plane, valve body bottom of control valve (9).
3. according to the control valve matable assembly of the described automatically controlled single cylinder fuel injection pump of claim 1, it is characterized in that the said pump housing (1) goes up axial high-pressure oil duct (L) and run through radially control valve mounting hole (K), be connected with endless-oil groove (C) on control valve (9) external cylindrical surface in the control valve mounting hole (K).
CN2011201297731U 2011-04-15 2011-04-15 Control valve matching component of electric control single-cylinder fuel injection pump Expired - Fee Related CN202031746U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201297731U CN202031746U (en) 2011-04-15 2011-04-15 Control valve matching component of electric control single-cylinder fuel injection pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201297731U CN202031746U (en) 2011-04-15 2011-04-15 Control valve matching component of electric control single-cylinder fuel injection pump

Publications (1)

Publication Number Publication Date
CN202031746U true CN202031746U (en) 2011-11-09

Family

ID=44894046

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201297731U Expired - Fee Related CN202031746U (en) 2011-04-15 2011-04-15 Control valve matching component of electric control single-cylinder fuel injection pump

Country Status (1)

Country Link
CN (1) CN202031746U (en)

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111109

Termination date: 20170415

CF01 Termination of patent right due to non-payment of annual fee