CN208950718U - A kind of timing and duration adjustable forced oil device - Google Patents

Abstract

The utility model discloses a kind of timings and duration adjustable forced oil device, belong to engine liquid pressure actuator technical field.The forced oil device includes duration adjustment mechanism and timing adjustment mechanism, and duration adjustment mechanism includes the first rotating mechanism, can drive plunger rotation, by the relative position for changing skewed slot and oil return opening；Timing adjustment mechanism includes adjustment section and the second rotating mechanism, and one end of adjustment section is contacted with engine cam, and the other end is connect with plunger；Second rotating mechanism and adjustment section are rotatablely connected, and the second rotating mechanism can adjust the relative position of plunger and adjustment section.The adjustment of fuel injection timing and duration can be realized by adding the first rotating mechanism, the second rotating mechanism and adjustment section in the utility model, and structure is simple, and processing technology difficulty is small, high reliablity, improves the dynamic property and economy of engine.

Description

A kind of timing and duration adjustable forced oil device

Technical field

The utility model relates to engine liquid pressure actuator technical field more particularly to a kind of timing and duration are adjustable Forced oil device.

Background technique

With world energy sources shortage and the pollution of environment, engine emission requirements are increasingly strict, this allows for engine It needs under different operating conditions using different control strategies.Such as in diesel fuel injection system, according to diesel load And the variation of revolving speed, need injection timing and distributive value adjustable.

In tradition machinery formula injection system, although can realize that engine sprays under different load by increasing upper skewed slot The adjusting of oily timing and duration, but the independent adjusting of injection timing and oil injection duration is still not implemented.Also just like patent Shown in CN103195630B, the independent adjusting of injection timing and oil injection duration is realized by the first, second oil inlet and oil return channel, but Since it processes plunger body, plunger bushing and cooperates more demanding, technology difficulty is larger, thus is not commercially available temporarily and pushes away Extensively.

Solenoid valve can be responded by height using high pressure co-rail system at present and high-pressure common rail technology neatly changes oil spout Timing and oil injection duration, but because its cost is high, and reliability is relatively low, so that the economy and reliability of engine It is not high.

For this purpose, it is urgent to provide a kind of timing with duration adjustable forced oil device to solve the above problems.

Utility model content

One of the utility model is designed to provide a kind of timing and duration adjustable forced oil device, may be implemented to supply The independent adjusting of oily timing and duration, structure is reliable, good manufacturability.

For this purpose, the utility model uses following technical scheme:

A kind of timing and duration adjustable forced oil device, including the pump housing, one end of the pump housing is connected with pump cover, described Pump cover is provided with pressure oil passage, and the other end of the pump housing is provided with engine cam, is provided with and is slidably matched in the pump housing Plunger and plunger bushing；Low pressure oil pocket is set on the pump housing, and is provided with oil inlet and oil return opening on the plunger bushing, it is described Oil inlet and the oil return opening are connected to the low pressure oil pocket, and the plunger bushing is connected to the pressure oil passage；Wherein, institute State plunger and be additionally provided with skewed slot and through-hole, the skewed slot is set in the head side wall of the plunger, the skewed slot can with it is described Oil return opening connection；The through-hole is set in the head of the plunger, and the head that one end of the through-hole is located at the plunger is leaned on The end face of the nearly pressure oil passage, the other end of the through-hole are located in the skewed slot, and the plunger is in the engine cam Under the action of selectively the oil inlet or the oil return opening can be opened and closed；Further include:

Duration adjustment mechanism comprising:

First rotating mechanism can drive the plunger rotation, opposite with the oil return opening by changing the skewed slot Position is to change fuel feeding finish time；

Timing adjustment mechanism comprising:

Adjustment section, one end are contacted with the engine cam, and the other end is connect with the plunger；

Second rotating mechanism is rotatablely connected with the adjustment section, and second rotating mechanism can adjust the plunger With the connection length of the adjustment section, to change the plunger close to one end of the pump cover and the initial phase pair of the oil inlet Position.

The tune of fuel injection timing and duration can be realized by adding the first rotating mechanism, the second rotating mechanism and adjustment section It is whole, compared with the prior art in by by plunger bushing be divide into upper part and lower part respectively with plunger cooperate, and need on plunger bushing Rotation section is added, the structure of the forced oil device of the utility model is simple, and processing technology difficulty is small, and high reliablity improves and starts The dynamic property and economy of machine.

Preferably, first rotating mechanism includes:

First gear engaging mechanism, including the first driving link and the first driven member, the external setting of first driven member There is the first gear ring engaged with first driving link, first driven member is internally provided with first axis guide groove；

First guide part is set on the plunger, and with the first axis guide groove cooperate, the plunger with it is described First driven member can be relatively moved along axial, and the plunger and first driven member can rotate together.

Preferably, second rotating mechanism includes:

Second gear engaging structure, including the second driving link and the second driven member, the external setting of second driven member There is the second gear ring engaged with second driving link, second driven member is internally provided with the second axial channel；

The adjustment section includes:

Guide tube, one end are contacted with the engine cam, and the guide tube is set far from one end of the engine cam It is equipped with the first screw thread；

Intermediate mass is set between the guide tube and the plunger rod, and one end of the intermediate mass and the plunger Connection, the other end are provided with the second screw thread, and the intermediate mass can be threadedly coupled with the guide tube, and be set on the outside of the intermediate mass It is equipped with the second guide part；

Second guide part and second axial channel cooperate, the intermediate mass with can along it is axial with described second from Relative movement occurs for moving part and the intermediate mass and second driven member can rotate together.

Preferably, the forced oil device further includes the first pin, first pin is set to the side wall of the pump housing, is used for Limit the plunger bushing rotation.

Preferably, the forced oil device further includes the second pin, second pin is set to the side wall of the pump housing, is used for Limit the guide tube rotation.

Preferably, first screw thread is external screw thread, second screw thread is internal screw thread.

Preferably, the guide tube is provided with idler wheel, the idler wheel and the engine far from one end of the adjustment section Cam contact.

Preferably, the forced oil device further includes spring, the spring pocket is set on the outside of the guide tube, and the spring One end abutted with the positive stop end of the guide tube, the other end is abutted with the intracorporal spring base of the pump.

The utility model has the beneficial effects that

The present embodiment can be realized fuel injection timing by adding the first rotating mechanism, the second rotating mechanism and adjustment section and hold The adjustment renewed is cooperated with plunger compared in other embodiments by the way that plunger bushing to be divide into upper part and lower part respectively, and is needed Rotation section is added on plunger bushing, the structure of the present embodiment forced oil device is simple, and processing technology difficulty is small, high reliablity, improves The dynamic property and economy of engine.

Detailed description of the invention

Fig. 1 is the timing of one of the utility model embodiment and the first section signal of duration adjustable forced oil device Figure.

Fig. 2 is the timing of one of the utility model embodiment and the second section signal of duration adjustable forced oil device Figure.

In figure:

1, pump cover；2, the pump housing；3, plunger bushing；4, low pressure oil pocket；5, oil inlet；6, oil return opening；7, skewed slot；8, plunger；9, First driven member；10, the second driven member；11, intermediate mass；12, spring base；13, spring；14, guide tube；15, press oil port；16, high Pumping cavity；17, upper end face；18, the first pin；19, the first guide part；20, the first driving link；21, the second driving link；22, Second screw thread；23, idler wheel；24, roller pin；25, engine cam；26, the second pin；27, low pressure oil input channel；28, low pressure oil return Road.

Specific embodiment

The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts The range of type protection.Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

As shown in Figs. 1-2, the present embodiment discloses a kind of timing and duration adjustable forced oil device, which includes Pump cover 1, the pump housing 2, plunger bushing 3, plunger 8, duration adjustment mechanism, timing adjustment mechanism and engine cam 25.

One end of the pump housing 2 is connected with pump cover 1, and pump cover 1 is provided with pressure oil passage, and it is convex that 2 other end of the pump housing is provided with engine 25 are taken turns, is provided with the plunger 8 and plunger bushing 3 being slidably matched in the pump housing 2；The plunger 8 and plunger being slidably matched are provided in the pump housing 2 Set 3, wherein plunger 8 divides for head and bar portion；Low pressure oil pocket 4 is provided on the pump housing 2, correspondingly, being additionally provided with low pressure oil input channel 27 and low pressure back oil road 28, and oil inlet 5 and oil return opening 6 are provided on plunger bushing 3, oil inlet 5 and oil return opening 6 are and low pressure oil Chamber 4 is connected to, and plunger bushing 3 is connected to pressure oil passage；Wherein, plunger 8 is additionally provided with skewed slot 7 and through-hole, and skewed slot 7 is set to plunger In 8 head side wall, skewed slot 7 can be connected to oil return opening 6；Through-hole is set in the head of plunger 8, and one end of through-hole is located at plunger 8 head is located in skewed slot 7 close to the end face of pressure oil passage, the other end of through-hole.When cam rotation, can drive on plunger 8 It is lower to move to carry out pressure oil, meanwhile, plunger 8 can selectively beat oil inlet 5 or oil return opening 6 under the action of engine cam 25 It is open and close.

Plunger bushing 3 is slidably matched with plunger 8, and upper end face 17 is a flat surface, and upper end face 17 and fuel feed hole cooperate, When 17 position of upper end face is lower than 5 top edge of oil inlet, the low pressure oil pocket 4 in 3 outside of plunger bushing and the high pressure in plunger bushing 3 Oil pocket 16 is connected to, and low pressure oil can be supplemented into high-voltage oil cavity 16；When 17 position of upper end face is higher than 5 top edge of oil inlet When, low pressure oil pocket 4 is no longer connected to high-voltage oil cavity 16, and plunger 8 continues oil liquid pressure in upper enforcement high-voltage oil cavity 16 and increases simultaneously edge Fuel feeding is realized in high-pressure oil outlet outflow.Therefore upper end face 17 and the relative position of oil inlet 5 determine fuel injection timing.Plunger 8 heads are equipped with skewed slot 7, and skewed slot 7 and oil return opening 6 cooperate, when plunger 8 continues uplink, when skewed slot 7 is connected to oil return opening 6, high pressure oil High pressure oil in chamber 16 can enter the intracavitary of skewed slot 7 through the oilhole in 8 head of plunger center and then flow back to low pressure oil pocket 4, high pressure oil Oil liquid pressure in chamber 16 reduces rapidly, and fuel feeding terminates.Fuel injection timing and fuel feeding have codetermined fuel delivery duration at the time of end Phase.It should be noted that high-voltage oil cavity 16, which is merely representative of the oil pressure under the effect of piston in the oil pocket, to be increased, not Refer in high-voltage oil cavity 16 always with the presence of the pressure oil higher than low pressure oil pocket 4.

Wherein, duration adjustment mechanism includes the first rotating mechanism, it can drive plunger 8 to rotate with the first rotating mechanism, is led to The relative position for changing skewed slot 7 and oil return opening 6 is crossed to change fuel feeding finish time.Specifically, the first rotating mechanism includes first Gear engagement mechanism, including the first driving link 20 and the first driven member 9, the outside of the first driven member 9 are provided with first actively The first gear ring that part 20 engages, the first driven member 9 are internally provided with first axis guide groove；Correspondingly, being provided on plunger 8 One guide part 19, the first guide part 19 cooperate with first axis guide groove, and plunger 8 and the first driven member 9 can occur relatively along axial Mobile and plunger 8 and the first driven member 9 can rotate together.Therefore, when the first driving link 20 drives the rotation of the first driven member 9, Plunger 8 will be rotated together with the first driven member 9, and skewed slot 7 and the relative position of oil return opening 6 change, fuel feeding finish time because And change, also just change the fuel delivery duration phase.

Timing adjustment mechanism includes adjustment section and the second rotating mechanism, and adjustment section one end is contacted with engine cam 25, separately One end is connect with plunger 8；Second rotating mechanism and adjustment section are rotatablely connected, and the second rotating mechanism can adjust plunger 8 and adjustment The relative position in portion, to change plunger 8 close to one end of pump cover 1 and the initial relative position of oil inlet 5.Specifically, second turn Motivation structure includes second gear engaging structure, including the second driving link 21 and the second driven member 10, the outside of the second driven member 10 It is provided with the second gear ring engaged with the second driving link 21, the second driven member 10 is internally provided with the second axial channel；Adjustment Portion includes guide tube 14 and intermediate mass 11, and one end of guide tube 14 is contacted with engine cam 25, and guide tube 14 is far from engine cam 25 one end is provided with the first screw thread；Intermediate mass 11 is set between guide tube 14 and the bar portion of plunger 8, and one end of intermediate mass 11 It being connect with the bar portion of plunger 8, the other end is provided with the second screw thread 22, and intermediate mass 11 can be threadedly coupled with guide tube 14, wherein it is preferred that First screw thread is external screw thread, and the second screw thread 22 is internal screw thread, and the outside of intermediate mass 11 is provided with the second guide part；Second guiding Portion and the second axial channel cooperate, intermediate mass 11 with along axial direction and the second driven member 10 relative movement can occur and intermediate mass 11 and Second driven member 10 can rotate together.When the rotation of the second driving link 21, the second driven member 10 can be rotated accordingly, and drive centre Block 11 rotates together, and since intermediate mass 11 is threadedly coupled with guide tube 14, the rotation of intermediate mass 11 is so that itself and 14 phase of guide tube It changes to position, that is, intermediate mass 11 is moved axially with respect to guide tube 14.Wherein intermediate mass 11 is connect with the lower part of plunger 8, when When intermediate mass 11 is axially moveable, plunger 8 is also axially moveable with intermediate mass 11, accordingly even when engine cam 25 does not rotate, Upper end face 17 can also change with relative position of the oil inlet 5 in 8 direction of motion of plunger, thus when changing fuel feeding It carves.

Wherein the first driving link 20 and the second driving link 21 can be gear or rack gear, in this present embodiment, preferably first Driven member 9 is rack gear, and the moving component of drive rack can be set except the pump housing 2, easy for installation.

The present embodiment can be realized fuel injection timing by adding the first rotating mechanism, the second rotating mechanism and adjustment section and hold The adjustment renewed is cooperated with plunger 8 compared in other embodiments by the way that plunger bushing 3 to be divide into upper part and lower part respectively, and is needed Rotation section is added on plunger bushing 3, the structure of the present embodiment forced oil device is simple, and processing technology difficulty is small, and high reliablity mentions The high dynamic property and economy of engine.

Further, forced oil device further includes the first pin 18 and the second pin 26 for being all set in 2 side wall of the pump housing, wherein first Pin 18 is for limiting the rotation of plunger bushing 3, and the second pin 26 is for limiting the rotation of guide tube 14.Due to plunger bushing 3 and the opposite pump of guide tube 14 Body 2 does not rotate, and to prevent plunger bushing 3 and guide tube 14 from rotating under the action of other component, therefore the first pin 18 is arranged Plunger bushing 3 and guide tube 14 are limited respectively with the second pin 26.

Wherein, guide tube 14 is provided with roller pin 24 far from one end of adjustment section, and idler wheel 23, idler wheel are connected on roller pin 24 23 contact with engine cam 25.It, can be by connecting a plate with guide tube 14 to replace roller pin 24 in other embodiments With the setting of idler wheel 23.The present embodiment is contacted by the way that idler wheel 23 is arranged with engine cam 25, can make each of idler wheel 23 Part can only be able to be specific a part and engine cam 25 relative to plate with the Hp contacts of engine cam 25 Hp contacts, undoubtedly the idler wheel 23 in the present embodiment is compared to the service life is longer with the plate in other embodiments, to make to press The reliability of oily device is higher.

Also, forced oil device further includes spring 13, and spring 13 is sheathed on 14 outside of guide tube, and one end of spring 13 and guide tube 14 positive stop end abuts, and the other end is abutted with the spring base 12 being set in the pump housing 2.The convex of engine cam 25 can be worked as in this way When edge is not contacted with idler wheel 23, plunger 8 resets when forced oil device can be under the action of spring 13.

In addition, the adjusting method of a kind of timing and duration adjustable forced oil device is also disclosed in the present embodiment, using upper State forced oil device.

When adjusting the fuel delivery duration phase, the first rotating mechanism is driven, plunger 8 can be driven to rotate, make the skewed slot on plunger 8 7 change with the relative position of oil return opening 6.Specifically, the first driving link 20 of driving drives the rotation of the first driven member 9, plunger 8 It being rotated with the first driven member 9, skewed slot 7 and the relative position of oil return opening 6 change, it fuel feeding finish time thus changes, And then cooperated with fuel injection timing to change the fuel delivery duration phase.

When adjusting fuel injection timing, the second rotating mechanism is driven to make column to adjust the connection length of plunger 8 Yu adjustment section Plug 8 changes close to one end of pump cover 1 and the initial relative position of oil inlet 5.Specifically, the second driving link 21 of driving drives The rotation of second driven member 10, intermediate mass 11 are rotated with the second driven member 10, so that the relative position of intermediate mass 11 and guide tube 14 is sent out Changing, to change upper end face 17 and relative position of the oil inlet 5 on 8 direction of plunger with the fuel feeding that is needed just When.

Individually fuel injection timing and fuel delivery duration phase can be adjusted by above-mentioned adjusting method, and operate and be easy.

Obviously, the above embodiments of the present invention is used for the purpose of clearly illustrating examples for clearly illustrating the present invention, and It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in Within the protection scope of the utility model claims.

Claims (8)

1. a kind of timing and duration adjustable forced oil device, including the pump housing (2), one end of the pump housing (2) are connected with pump cover (1), the pump cover (1) is provided with pressure oil passage, and the other end of the pump housing (2) is provided with engine cam (25), the pump The plunger (8) and plunger bushing (3) being slidably matched are provided in body (2)；Low pressure oil pocket (4) are set on the pump housing (2), and described Be provided with oil inlet (5) and oil return opening (6) on plunger bushing (3), the oil inlet (5) and the oil return opening (6) with it is described low Pumping cavity (4) connection, and the plunger bushing (3) is connected to the pressure oil passage；Wherein, the plunger (8) is additionally provided with skewed slot (7) it is set on the plunger (8) side wall with through-hole, the skewed slot (7), the skewed slot (7) can be with the oil return opening (6) even It is logical；The through-hole is set in the plunger (8), and one end of the through-hole is located at the plunger (8) close to the pressure oil passage End face, the other end of the through-hole is located in the skewed slot (7), work of the plunger (8) in the engine cam (25) Selectively the oil inlet (5) or the oil return opening (6) can be opened and closed under；It is characterized by further comprising:

Duration adjustment mechanism comprising:

First rotating mechanism can drive the plunger (8) to rotate, by changing the skewed slot (7) and the oil return opening (6) Relative position is to change fuel feeding finish time；

Timing adjustment mechanism comprising:

Adjustment section, one end are contacted with the engine cam (25), and the other end is connect with the plunger (8)；

Second rotating mechanism, with the adjustment section be rotatablely connected, and second rotating mechanism can adjust the plunger (8) with The connection length of the adjustment section, to change the plunger (8) one end and the oil inlet (5) close to the pump cover (1) Initial relative position.

2. timing according to claim 1 and duration adjustable forced oil device, which is characterized in that first rotating machine Structure includes:

First gear engaging mechanism, including the first driving link (20) and the first driven member (9), first driven member (9) it is outer Portion is provided with the first gear ring engaged with first driving link (20), and first driven member (9) is internally provided with first Axial channel；

First guide block is set on the plunger (8), and with the first axis guide groove cooperate, the plunger (8) with it is described First driven member (9) can be relatively moved along axial, and the plunger (8) and first driven member (9) can rotate together.

3. timing according to claim 1 and duration adjustable forced oil device, which is characterized in that second rotating machine Structure includes:

Second gear engaging structure, including the second driving link (21) and the second driven member (10), second driven member (10) Outside is provided with the second gear ring engaged with second driving link (21), and second driven member (10) is internally provided with Two axial channels；

The adjustment section includes:

Guide tube (14), one end are contacted with the engine cam (25), and the guide tube (14) is far from the engine cam (25) one end is provided with the first screw thread；

Intermediate mass (11) is set between the guide tube (14) and the plunger (8), and one end of the intermediate mass (11) with Plunger (8) connection, the other end are provided with the second screw thread (22), and the intermediate mass (11) can connect with the guide tube (14) screw thread It connects, and is provided with the second guide part on the outside of the intermediate mass (11)；

Second guide part and second axial channel cooperate, the intermediate mass (11) with can along it is axial with described second from Relative movement occurs for moving part (10) and the intermediate mass (11) and second driven member (10) can rotate together.

4. timing according to claim 1 and duration adjustable forced oil device, which is characterized in that the forced oil device is also Including the first pin (18), first pin (18) is set to the side wall of the pump housing (2), turns for limiting the plunger bushing (3) It is dynamic.

5. timing according to claim 3 and duration adjustable forced oil device, which is characterized in that the forced oil device is also Including the second pin (26), second pin (26) is set to the side wall of the pump housing (2), turns for limiting the guide tube (14) It is dynamic.

6. timing according to claim 3 and duration adjustable forced oil device, which is characterized in that first screw thread is External screw thread, second screw thread (22) are internal screw thread.

7. timing according to claim 3 and duration adjustable forced oil device, which is characterized in that the guide tube (14) is remote One end from the adjustment section is provided with idler wheel (23), and the idler wheel (23) contacts with the engine cam (25).

8. timing according to claim 3 and duration adjustable forced oil device, which is characterized in that the forced oil device is also Including spring (13), the spring (13) is sheathed on the outside of the guide tube (14), and one end of the spring (13) is led with described The positive stop end of cylinder (14) abuts, and the other end is abutted with the spring base (12) in the pump housing (2).