CN202690285U - Diesel engine fuel injection pump having changeable injection timing - Google Patents
Diesel engine fuel injection pump having changeable injection timing Download PDFInfo
- Publication number
- CN202690285U CN202690285U CN 201220398293 CN201220398293U CN202690285U CN 202690285 U CN202690285 U CN 202690285U CN 201220398293 CN201220398293 CN 201220398293 CN 201220398293 U CN201220398293 U CN 201220398293U CN 202690285 U CN202690285 U CN 202690285U
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- fuel
- advance angle
- plunger
- flow control
- bearing
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Abstract
The utility model relates to a diesel engine fuel injection pump having changeable injection timing. The diesel engine fuel injection pump comprises a plunger and barrel assembly, a plunger, a pump seat, a plunger spring, a cam, an oil outlet, an oil inlet, an angular-advance adjusting gear, an angular-advance adjusting gear shaft, an angular-advance adjusting bearing, a rear end cover, a front end cover, a lower end cover, an oil quantity adjusting bearing, an oil quantity adjusting gear shaft, an oil quantity adjusting rack wheel, an oil quantity adjusting pinion and an upper end cover. A rack is arranged on the outer circle face of the plunger and barrel assembly, an angular-advance adjusting mechanism is arranged on the pump seat, the lower portion of the plunger is provided with an oil quantity adjusting mechanism which comprises the oil quantity adjusting rack wheel, the lower end cover, the oil quantity adjusting bearing, the oil quantity adjusting gear shaft, the oil quantity pinion and the upper end cover. The diesel engine fuel injection pump can achieve adjustment of oil quantity and oil supply angular advance, is specially suitable for occasions of diesel engine variable working conditions, and can effectively improve economy of a diesel engine in part load.
Description
Technical field
The utility model belongs to electromechanical integration technology area, relates to a kind of diesel injection pump of variable injection timing.
Background technique
Modern marine diesel engine having obtained considerable effect aspect the raising Economy, has proposed multiple conservation measures closely during the last ten years.In these measures, the most important thing is to improve and keep the highest detonation pressure.In general, the highest detonation pressure and fuel consumption rate are closely related, and the highest detonation pressure fuel consumption rate that rises then descends.Diesel engine is the design of high detonation pressure, usually can only just can reach demarcating under the load.When sub load, because fuel delivery reduces, its maximum explosive pressure also decreases, and Economy descends.And as marine main engine, consider the speed of a ship or plane and the margin of power, its equipped power under rated engine speed is about 80%～90% nominal power; Namely diesel engine continuation of the journey load commonly used aboard ship is not rated load, but sub load this means that the Economy under the continuation of the journey load descends to some extent.For this reason, need a kind of variable injection timing mechanism, guarantee when changing load, along with the change of Injection Pump fuel delivery can be adjusted its fuel supply advance angle automatically, so that diesel engine still has higher maximum explosive pressure when sub load is moved, to improve the Economy of sub load.Simultaneously when high load, can control maximum explosive pressure again, make it to be no more than the demarcation detonation pressure.
Summary of the invention
The utility model causes Economy decline problem for marine diesel engine running load variations, when requiring diesel engine under sub load, to move, along with the change of Injection Pump fuel delivery can be adjusted its fuel supply advance angle automatically, and the Injection Pump scheme of a kind of variable injection timing that provides.
Technical solution adopted in the utility model is:
A kind of Injection Pump of diesel engine variable injection timing comprises plunger coupled parts, plunger, pump seat, piston spring, cam, oil outlet, filler opening, advance angle adjusting gear, advance angle regulating tooth wheel shaft, advance angle adjusting bearing, rear end cover, front cover, lower end cap, fuel-flow control bearing, pinion for fuel control axle, fuel-flow control gearwheel, fuel-flow control small gear and upper end cap.
Periphery at plunger coupled parts is provided with tooth bar, at pump seat the injection advance angle controlling mechanism is installed, and described injection advance angle controlling mechanism comprises advance angle adjusting gear, advance angle regulating tooth wheel shaft, advance angle adjusting bearing, rear end cover and front cover; Tooth bar engagement on the periphery of described advance angle adjusting gear and plunger coupled parts, the tooth bar on the advance angle adjusting gear drive plunger couple moves up and down plunger coupled parts, realizes the change of fuel injection beginning time, namely realizes the adjustment of injection advance angle; Described advance angle adjusting gear is placed on the advance angle regulating tooth wheel shaft, and advance angle regulating tooth wheel shaft is regulated the bearing supporting by the advance angle at two ends, and the end that advance angle is regulated bearing is provided with front cover, and the other end arranges rear end cover.
Oil amount regulating mechanism is equipped with in bottom at plunger, and described oil amount regulating mechanism comprises the fuel-flow control gearwheel, lower end cap, fuel-flow control bearing, pinion for fuel control axle, fuel-flow control small gear and upper end cap; Described fuel-flow control gearwheel is arranged on the bottom of plunger, fuel-flow control small gear and the engagement of fuel-flow control gearwheel, and the fuel-flow control gearwheel of fuel-flow control small gear drive plunger makes plunger clockwise or rotates counterclockwise the adjustment of realization fuel injection quantity; Described fuel-flow control small gear is nested with on the pinion for fuel control axle, and the pinion for fuel control axle is by the fuel-flow control bearing supporting at two ends, and an end of pinion for fuel control axle is provided with upper end cap, and the other end is provided with lower end cap.
The beneficial effects of the utility model: the Novel fuel injection pump scheme that the utility model provides, can realize the adjusting of fuel delivery and fuel supply advance angle, be particularly suitable for the occasion of diesel engine variable working condition, the Economy of energy Effective Raise diesel engine under sub load, simultaneously when high load, can control maximum explosive pressure again, make it to be no more than the demarcation detonation pressure.Be conducive to like this improvement of diesel engine comprehensive economic performance and emission performance, therefore, have significant economy, society and environmental benefit.
Description of drawings
Fig. 1 is the principal section figure of the utility model Injection Pump;
Fig. 2 is A-A sectional drawing among the utility model Fig. 1;
Fig. 3 be among the utility model Fig. 1 L to figure;
Fig. 4 is B-B sectional drawing among the utility model Fig. 1;
Fig. 5 be among the utility model Fig. 4 M to figure;
Fig. 6 is C-C sectional drawing among the utility model Fig. 1;
Fig. 7 be among the utility model Fig. 6 N to figure.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Such as Fig. 1, Fig. 2, Fig. 4 and shown in Figure 6, Injection Pump of the present utility model is comprised of plunger coupled parts 1, plunger 2, pump seat 3, piston spring 4, cam 5, oil outlet 6, filler opening 7, advance angle adjusting gear 8, advance angle regulating tooth wheel shaft 9, advance angle adjusting bearing 10, rear end cover 11, front cover 12, lower end cap 13, fuel-flow control bearing 14, pinion for fuel control axle 15, fuel-flow control gearwheel 16, fuel-flow control small gear 17, upper end cap 18.Adopt the spill port regulating type, have skewed slot and straight trough at plunger 2 cylindricals.Plunger 2 drives by cam 5, replys by piston spring 4.Be provided with filler opening 7 and oil outlet 6 on the plunger coupled parts 1.Be provided with tooth bar on the periphery of plunger coupled parts 1, at pump seat 3 advance angle adjusting gear 8, advance angle regulating tooth wheel shaft 9, advance angle adjusting bearing 10, rear end cover 11, front cover 12 be installed, form the injection advance angle controlling mechanism.Advance angle adjusting gear 8, the tooth bar on the drive plunger couple 1 moves up and down plunger coupled parts 1, realizes the change of fuel injection beginning time, namely realizes the adjustment of injection advance angle.Fuel-flow control gearwheel 16 is equipped with in the bottom of plunger 2, forms oil amount regulating mechanism with lower end cap 13, fuel-flow control bearing 14, pinion for fuel control axle 15, fuel-flow control small gear 17, upper end cap 18 etc.Fuel-flow control small gear 17, the fuel-flow control gearwheel 16 of drive plunger 2 makes plunger 2 clockwise or rotates counterclockwise the adjustment of realization fuel injection quantity.Pump seat 3 is shapes of foreign side, inner circle.
Fig. 3 be the L of Injection Pump to figure, on vertical surface, have rectangle hole at the L of pump seat 3, be used on plunger coupled parts 1, being installed into hydraulic fluid port 7.
Fig. 5 be the M of Injection Pump to figure, on vertical surface, have rectangle hole at the M of pump seat 3, be used for installing the injection advance angle controlling mechanism.
Fig. 7 be the N of Injection Pump to figure, on vertical surface, have rectangle hole at the N of pump seat 3, be used for installing oil amount regulating mechanism.
Injection Pump of the present utility model belongs to Bosch injection pump.Plunger and the sleeve couple that partners.Plunger is pushed by cam in sleeve and pumps.The position is minimum when plunger is positioned at cam base circle, and this moment, upper cartridge was advanced the unlatching of (returning) oilhole, and fuel oil enters pump chamber.Plunger is pushed up by cam, when plunger top was not closed spill port, fuel oil flowed back to the oil-feed space through spill port in the pump chamber, until the plunger upper part end face is when just closing spill port, the pump chamber fuel oil begins by compression, and this moment, fuel feeding began.It is up that plunger continues, and when the skewed slot of plunger head was opened spill port, the high pressure fuel of plunger top communicated with spill port and flows back to oil-feed space, fuel feeding end this moment through the straight trough of plunger head and circular groove.From the commencement of fuel supply to the fuel feeding terminal point, the up delivery stroke of plunger is called the effective travel of plunger.
When the straight trough of plunger head was aimed at spill port, the fuel oil in the pump chamber all flowed back to the oil-feed space through spill port in whole up strokes of plunger, and this is cut-out position.Fuel supply advance angle is adjusted, and the fuel supply advance angle regulating mechanism that the axial tooth bar on the dependence sleeve cylindrical and the gear on pump housing top form is realized.When the gear rotation on pump housing top, the band moving sleeve moves up and down, and changes sleeve and advances (returning) oilhole with respect to the position of the pump housing, thereby realize the adjusting of fuel supply advance angle.
Fuel delivery is adjusted, and the fuel delivery controlling mechanism that the radially tooth bar on the dependence plunger cylindrical and the gear of pump housing bottom form is realized.When the rotation of the gear of pump housing bottom, drive plunger clockwise or rotate counterclockwise, change the plunger skewed slot advances (returning) oilhole with respect to sleeve position, thus the adjusting of realization fuel delivery.
Claims (1)
1. the Injection Pump of a diesel engine variable injection timing, comprise plunger coupled parts, plunger, pump seat, piston spring, cam, oil outlet, filler opening, advance angle adjusting gear, advance angle regulating tooth wheel shaft, advance angle adjusting bearing, rear end cover, front cover, lower end cap, fuel-flow control bearing, pinion for fuel control axle, fuel-flow control gearwheel, fuel-flow control small gear and upper end cap, it is characterized in that:
Periphery at plunger coupled parts is provided with tooth bar, at pump seat the injection advance angle controlling mechanism is installed, and described injection advance angle controlling mechanism comprises advance angle adjusting gear, advance angle regulating tooth wheel shaft, advance angle adjusting bearing, rear end cover and front cover; Tooth bar engagement on the periphery of described advance angle adjusting gear and plunger coupled parts, the tooth bar on the advance angle adjusting gear drive plunger couple moves up and down plunger coupled parts, realizes the change of fuel injection beginning time, namely realizes the adjustment of injection advance angle; Described advance angle adjusting gear is placed on the advance angle regulating tooth wheel shaft, and advance angle regulating tooth wheel shaft is regulated the bearing supporting by the advance angle at two ends, and the end that advance angle is regulated bearing is provided with front cover, and the other end arranges rear end cover;
Oil amount regulating mechanism is equipped with in bottom at plunger, and described oil amount regulating mechanism comprises the fuel-flow control gearwheel, lower end cap, fuel-flow control bearing, pinion for fuel control axle, fuel-flow control small gear and upper end cap; Described fuel-flow control gearwheel is arranged on the bottom of plunger, fuel-flow control small gear and the engagement of fuel-flow control gearwheel, and the fuel-flow control gearwheel of fuel-flow control small gear drive plunger makes plunger clockwise or rotates counterclockwise the adjustment of realization fuel injection quantity; Described fuel-flow control small gear is nested with on the pinion for fuel control axle, and the pinion for fuel control axle is by the fuel-flow control bearing supporting at two ends, and an end of pinion for fuel control axle is provided with upper end cap, and the other end is provided with lower end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398293 CN202690285U (en) | 2012-08-13 | 2012-08-13 | Diesel engine fuel injection pump having changeable injection timing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220398293 CN202690285U (en) | 2012-08-13 | 2012-08-13 | Diesel engine fuel injection pump having changeable injection timing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202690285U true CN202690285U (en) | 2013-01-23 |
Family
ID=47545911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220398293 Withdrawn - After Issue CN202690285U (en) | 2012-08-13 | 2012-08-13 | Diesel engine fuel injection pump having changeable injection timing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202690285U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777299A (en) * | 2012-08-13 | 2012-11-14 | 杭州电子科技大学 | Diesel engine variable injection timing oil injection pump |
-
2012
- 2012-08-13 CN CN 201220398293 patent/CN202690285U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777299A (en) * | 2012-08-13 | 2012-11-14 | 杭州电子科技大学 | Diesel engine variable injection timing oil injection pump |
| CN102777299B (en) * | 2012-08-13 | 2014-04-02 | 杭州电子科技大学 | Diesel engine variable injection timing oil injection pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20140402 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20140402 |
|
| RGAV | Abandon patent right to avoid regrant |