CN208380652U - A kind of automobile engine lift range variable regulating mechanism - Google Patents
A kind of automobile engine lift range variable regulating mechanism Download PDFInfo
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- CN208380652U CN208380652U CN201821047241.1U CN201821047241U CN208380652U CN 208380652 U CN208380652 U CN 208380652U CN 201821047241 U CN201821047241 U CN 201821047241U CN 208380652 U CN208380652 U CN 208380652U
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Abstract
The utility model discloses a kind of automobile engine lift range variable regulating mechanisms, for realizing the soft readjustment and control of valve lift parameter, comprising: cam a, plunger a, oil pressure adjusting valve, spring a etc..When the hydraulic oil duct conducting being made of oil duct a, Oil Guide annular groove, oil duct b, oil pressure adjusting valve adjusts hydraulic fluid pressure in oil storage room at this time, due to the difference of hydraulic fluid pressure in oil storage room, oil baffle disc, plunger b and spring a and the position balanced of hydraulic oil in oil storage room are just different, and The hydraulic oil is also different in oil storage room.When hydraulic oil duct is closed, cam b molded line section pushes plunger b downlink at this time, and hydraulic fluid pressure gradually rises in oil storage room, and when pressure reaches certain value, hydraulic fluid pressure overcomes spring c pretightning force to push valve downlink, opens valve.Due to the difference of The hydraulic oil in previous oil storage room in the process, valve lift amount also changes at this time, and structure is simple and clear, and feasibility is good.
Description
Technical field
The utility model relates to automobile technical fields, more particularly to technical field of engines, more particularly, to a kind of gas
Door lift adjustment mechanism.
Background technique
In technical field of engines, lift range variable (Variable Valve Lift, hereinafter referred to as VVL) device pair
The promotion of engine performance plays positive effect.So-called valve stroke refers to that engine valve is beaten completely from rigid be opened to
The range that can be gone up and down is opened, decisive role is played to the intake and exhaust amount of engine each duty cycle.
For different engine operating conditions, realize that different valve strokes is conducive to make engine all work under each operating condition
Make in perfect condition.For example, lesser valve stroke is conducive to increase in cylinder when engine is under the lower operating condition of revolving speed
Turbulent flow simultaneously improves burning velocity, promotes the torque output of engine at the low rotational speed；And when engine is in the higher work of revolving speed
When under condition, biggish valve stroke advantageously reduces intake resistance, to greatly improve air inflow, promotes engine in high revolving speed
Under power output.
Therefore, if a kind of regulating mechanism of lift range variable is able to achieve, engine performance will preferably be improved.
Utility model content
The purpose of the utility model is to overcome the deficiencies of existing technology, provide a kind of lift range variable adjusting machine
Structure can solve the problems, such as that engine parameter fixing belt is come, realize the soft readjustment and control of valve lift parameter, and then make to start
Machine is owned by a good distribution effect under each operating condition, improves engine performance.
The utility model provides a kind of automobile engine lift range variable regulating mechanism, including cylinder cap (1), spring a
(2), oil pressure adjusting valve (3), plunger a (4), mounting blocks (5), cam a (6), camshaft (7), cam b (8), plunger b (9), gear
Block (10), spring b (11), oil baffle disc (12), oil storage room (13), spring c (14), valve (15) composition, wherein mounting blocks (5) with
Cylinder cap is affixed, and spring a (2) is placed in the plunger mounting hole a (504) that mounting blocks (5) open up；(4) one end plunger a and cam a (6)
It is slidably connected, one end is protruded into plunger mounting hole a (504), and is connected with spring a (2)；Oil pressure adjusting valve (3) is arranged in installation
In the regulating valve mounting hole (501) that block (5) opens up；Cam a (6) and cam b (8) is respectively and fixedly connected in camshaft (7) outer surface；Column
Plug b (9) is slidably connected with cam b (8), and the circular hole that the other end passes through block (10) centre stretches to mounting blocks (5) and opens up
Stepped plunger mounting hole b (505) in；Block (10) is connected by screw thread with mounting blocks (5), and oil baffle disc (12) is fixed in column
Fill in b (9) outer surface；Spring b (11) is placed between block (10) and oil baffle disc (12)；Plunger a (4) and plunger mounting hole a (504)
Wall surface clearance fit, plunger b (9), block (10) and oil baffle disc (12) and valve and stepped plunger mounting hole b (505) wall surface
Same clearance fit.
Further, the plunger a (4) is equipped with Oil Guide annular groove (401), and the mounting blocks (5) are pacified equipped with oil pressure adjusting valve
Hole (501), oil duct a (502), oil duct b (503), plunger mounting hole a (504), stepped plunger mounting hole b (505) are filled, wherein
The oil storage that oil duct b (503) and plunger b (9), block (12), valve (15) and stepped plunger mounting hole b (505) wall surface surround
Room (13) communicates；The oil duct a when plunger a (4) Oil Guide annular groove (401) comes downwards between oil duct a (502) and oil duct b (503)
(502) it is connected with oil duct b (503), the oil duct a when Oil Guide annular groove (401) leaves between oil duct a (502) and oil duct b (503)
(502) it is disconnected with oil duct b (503).
Further, the cam a (6) is made of basic circle section a (601) and molded line section a (602), the cam b (8) by
Basic circle section b (801) and molded line section b (802) composition；The arrangement of molded line section b (802) and molded line section a (602) on camshaft (7)
Position is on the contrary, cam a (6) basic circle section a (601) is rotated when cam b (8) molded line section b (802) is turned to plunger b (9) upper end
To with plunger a (4) upper end, when basic circle section b (801) is turned to plunger b (9) upper end, molded line section a (602) is turned to and plunger
A (4) upper end；Meanwhile when molded line section b (802) is turned to plunger b (9) upper end, the Oil Guide annular groove (401) of plunger a (4) is no
Between oil duct a (502) and oil duct b (503), oil duct a (502) and oil duct b (503) are disconnected；When baseboard b (801) is turned to
When with plunger b (9) upper end, the Oil Guide annular groove (401) of plunger a (4) be will be moved between oil duct a (502) and oil duct b (503), oil
Road a (502) and oil duct b (503) conducting.
Further, when normal working of engine, cam a (6), cam b (8) are rotated with camshaft (7), work as cam
When a (6) molded line section (602) is in contact with plunger a (4), cam a (6) overcomes spring a (2) elastic force that plunger a (4) is pushed to transport downwards
Dynamic, Oil Guide annular groove (401) moves between oil duct a (502) and oil duct b (503) in plunger a (4), at this point, from oil pressure adjusting valve
(3) it is connected to the hydraulic oil duct of oil storage room (13), vehicle-mounted ECU obtains optimal valve lift amount according to current working, thus calculates
Required hydraulic fluid pressure out passes through hydraulic fluid pressure in oil pressure adjusting valve (3) control oil storage room (13).Due in oil storage room (13)
The presence of hydraulic fluid pressure, spring b (11) elastic force keep balancing with hydraulic fluid pressure in oil storage room (13), at this time oil baffle disc
(12), plunger b (9) floats on hydraulic oil upper surface in oil storage room (13).Since spring c (14) coefficient of elasticity is much higher than spring b
(11), therefore at this time there is no generate obvious displacement by spring c (14).Camshaft (7) continues cam a (6) basic circle section when rotation
(601) it is in contact with plunger b (4), spring a (2) elastic force pushes plunger a (4) to move upwards, and hydraulic circuit is separated；Cam b
(8) molded line section (802) is in contact with plunger b (9) upper surface, and cam b (8) pushes plunger b (9) to move downward, due to liquid at this time
Pressure oil road is separated, and hydraulic fluid pressure constantly increases, and when hydraulic fluid pressure reaches certain value, hydraulic fluid pressure overcomes spring c
(14) pretightning force opens valve (15).
Further, when engine operating condition, which changes, to be needed to change valve stroke, in cam a (6) molded line section (602)
When being in contact with plunger a (4), vehicle-mounted ECU obtains optimal valve lift amount according to current working, thus calculates required hydraulic oil
Pressure passes through hydraulic fluid pressure in oil pressure adjusting valve (3) control oil storage room (13).If needing to increase valve lift amount at this time,
When hydraulic oil enters oil storage room (13), due to the effect of hydraulic fluid pressure, oil baffle disc (12), plunger b (9) overcome spring (11)
Pretightning force moves upwards, and move distance is depending on hydraulic fluid pressure, and The hydraulic oil also changes in oil storage room (13).Oil storage room
(13) change of The hydraulic oil is so that when cam b (8) molded line section (802) pushes down on (9) plunger b in, a relatively upper mistake
In journey the opening time of valve (15) earlier, and due in oil storage room (13) hydraulic oil relatively upper one it is described during it is more, when
When plunger b (9) drives oil baffle disc (12) to move to lower dead center, the Bottom Runby of valve (15) is bigger, to realize valve stroke
Increase, reduce valve stroke process take countermeasures can be realized.
The guiding theory of above-mentioned technical proposal is: this lift range variable regulating mechanism, by oil pressure adjusting valve into
Enter hydraulic fluid pressure in oil storage room accurately to be controlled, realizes lift range variable.Engine need to change valve stroke to
When adjusting air inflow, when hydraulic oil duct is opened, ECU obtains current working optimal valve liter according to prefabricated valve stroke MAP chart
Cheng Liang, hydraulic fluid pressure needed for reaching this valve lift amount needed for thus calculating, and then adjusted by oil pressure adjusting valve (3)
Hydraulic fluid pressure in oil storage room (13).If valve lift amount needs to increase at this time, oil pressure adjusting valve (3) control hydraulic circuit with
And hydraulic fluid pressure increases in oil storage room (13), on the one hand, since spring b (11) coefficient of elasticity is lower, when in oil storage room (13)
When hydraulic fluid pressure increases, hydraulic oil will overcome spring b (11) elastic force to jack up oil baffle disc (13) and plunger b (9) upwards, when
The hydraulic oil also increases in preceding oil storage room (13)；On the other hand, since spring c (14) coefficient of elasticity is much higher than spring b (11) bullet
Property coefficient, although hydraulic pressure increased insufficient pressure to overcome spring c (14) pretightning force to open valve (15) at this time.
When hydraulic oil duct is closed, cam b (8) molded line section (802) is in contact with plunger b (9) upper surface, and cam b (8) pushes plunger b
(9) it moves downward, since hydraulic circuit is separated at this time, hydraulic fluid pressure is constantly increased, when hydraulic fluid pressure reaches certain value
When, hydraulic fluid pressure overcomes spring c (14) pretightning force to open valve (15).
The prior art is compared, lift range variable regulating mechanism described in the utility model has the advantage that
The utility model realizes the function of the lift parameter soft readjustment of valve, effectively improves traditional valve actuating mechanism
The shortcomings that valve opening cannot being adjusted with the change of engine operating condition.It ensure that engine can obtain under any operating condition
One preferable distribution effect, improves the dynamic property and economy of engine, reduces the discharge of noxious pollutant.
Detailed description of the invention
Fig. 1 is the lift range variable regulating device structural schematic diagram a of the utility model
Fig. 2 is the lift range variable regulating device structural schematic diagram b of the utility model
Fig. 3 is the plunger a sectional view of the utility model
Fig. 4 is the mounting blocks sectional view of the utility model
Fig. 5 is the cam a sectional view of the utility model
Fig. 6 is the cam b sectional view of the utility model
Wherein: 1. cylinder cap, 2. spring a, 3. oil pressure adjusting valve, 4. plunger a, 5. mounting blocks, 6. cam a, 7. camshaft 8.
15. valve of cam b 9. plunger b, 10. block, 11. spring b, 12. oil baffle disc, 13. oil storage room, 14. spring c, 401. Oil Guide
The installation of 504. plunger mounting hole a of annular groove 501. regulating valve mounting hole, 502. oil duct a, 503. oil duct b, 505. stepped plunger
Hole b
Specific embodiment
Below against attached drawing, to for example related each component of specific embodiment of the present utility model, various pieces it
Between mutual alignment and interconnected relationship, function and working principle of each section etc. be described in further detail.
As shown in Figure 1, a kind of automobile engine lift range variable regulating mechanism, by cylinder cap (1), spring a
(2), oil pressure adjusting valve (3), plunger a (4), mounting blocks (5), cam a (6), camshaft (7), cam b (8), plunger b (9), gear
Block (10), spring b (11), oil baffle disc (12), oil storage room (13), spring c (14), valve (15) composition.Wherein mounting blocks (5) with
Cylinder cap is affixed, and spring a (2) is placed in the plunger mounting hole a (504) that mounting blocks (5) open up；(4) one end plunger a and cam a (6)
It is slidably connected, one end is protruded into plunger mounting hole a (504), and is connected with spring a (2)；Oil pressure adjusting valve (3) is arranged in installation
In the regulating valve mounting hole (501) that block (5) opens up；Cam a (6) and cam b (8) is respectively and fixedly connected in camshaft (7) outer surface；Column
Plug b (9) is slidably connected with cam b (8), and the circular hole that the other end passes through block (10) centre stretches to mounting blocks (5) and opens up
Stepped plunger mounting hole b (505) in；Block (10) is connected by screw thread with mounting blocks (5), and oil baffle disc (12) is fixed in column
Fill in b (9) outer surface；Spring b (11) is placed between block (10) and oil baffle disc (12)；Plunger a (4) and plunger mounting hole a (504)
Wall surface clearance fit, plunger b (9), block (10) and oil baffle disc (12) and valve and stepped plunger mounting hole b (505) wall surface
Same clearance fit.
As shown in figure 3, described (4) one end plunger a is equipped with Oil Guide annular groove (401).
As shown in figure 4, the mounting blocks (5) are equipped with oil pressure adjusting valve mounting hole (501), oil duct a (502), oil duct b
(503), plunger mounting hole a (504), stepped plunger mounting hole b (505), wherein oil duct b (503) and plunger b (9), block
(12), the oil storage room (13) that valve (15) and stepped plunger mounting hole b (505) wall surface surround communicates；When plunger a (4) Oil Guide
Annular groove (401) comes downwards to oil duct a (502) and oil duct b (503) conducting when between oil duct a (502) and oil duct b (503), works as Oil Guide
Annular groove (401) leaves oil duct a (502) and oil duct b (503) when between oil duct a (502) and oil duct b (503) and disconnects.
As shown in figure 5, cam a (6) is made of basic circle section a (601) and molded line section a (602).
As shown in fig. 6, cam b (8) is made of basic circle section b (801) and molded line section b (802).
As shown in Figure 1, cam a (6), cam b (8) follow camshaft (7) to rotate, cam a when normal working of engine
(6) during molded line section a (602) and plunger a (4) come into contact with, cam a (6) applies a pressure to plunger a (4), pressure with
The rotation of cam a (4) and be gradually increased, when reaching position shown in Fig. 1, pressure reaches maximum value, during this, plunger a
(4) overcome spring a (2) elastic force downlink, the Oil Guide annular groove (401) of plunger a (4) is made to move to the oil duct a in mounting blocks (5)
(502) between oil duct b (503), lead the hydraulic circuit being made of oil duct a (502), Oil Guide annular groove (401), oil duct b (503)
It is logical, to realize control of the oil pressure adjusting valve (3) to hydraulic fluid pressure in oil storage room (13).Vehicle-mounted ECU is obtained according to current working
Thus optimal valve lift amount out calculates required hydraulic fluid pressure, pass through liquid in oil pressure adjusting valve (3) control oil storage room (13)
Oil pressure.Hydraulic fluid pressure is by plunger b (9) and oil baffle disc (12) support in position as shown in the figure, spring b (11) elastic force and storage
Hydraulic fluid pressure keeps balance in grease chamber (13), since spring c (14) coefficient of elasticity is much higher than spring b (11), bullet at this time
There is no generate obvious displacement by spring c (14).
As shown in Fig. 2, continuing to rotate with camshaft (7), cam a (6) molded line section (602) leaves plunger a (4) top
It is in contact at the top of portion, cam a (6) basic circle section (601) and plunger a (4), spring a (2) elastic force pushes plunger a (4) to transport upwards at this time
It is dynamic to be in contact with cam a (6) basic circle section (601), at this time in plunger a (4) Oil Guide annular groove (401) be no longer at oil duct a (502),
Between oil duct b (503), hydraulic circuit is separated, and hydraulic oil is in air-tight state in oil storage room (13).Due to cam b (8) with it is convex
Wheel (6) direction a arrangement at the top of cam b (8) molded line section (802) and plunger b (9) on the contrary, come into contact with, during previous at this time
Cam a (6) molded line section a (602) is similar with plunger a (4) contact process, and due to the presence of hydraulic oil in oil storage room (13), convex
During taking turns b (8) promotion plunger b (9) downlink, the continuous raising of hydraulic fluid pressure, when hydraulic fluid pressure reaches certain value, liquid
Oil pressure overcomes spring c (14) pretightning force to open valve (15).
If engine operating condition changes, when needing to change valve stroke to adjust air inflow, when hydraulic oil duct is opened
When, ECU obtains current working optimal valve lift amount according to prefabricated valve stroke MAP chart, reaches this gas needed for thus calculating
Hydraulic fluid pressure needed for door lift amount, and then hydraulic fluid pressure in oil storage room (13) is adjusted by oil pressure adjusting valve (3).If this
When valve lift amount need to increase, then oil pressure adjusting valve (3) control hydraulic circuit and oil storage room (13) in hydraulic fluid pressure liter
It is high, on the one hand, since spring b (11) coefficient of elasticity is lower, when hydraulic fluid pressure increases in oil storage room (13), hydraulic oil general gram
It takes spring b (11) elastic force to jack up oil baffle disc (13) and plunger b (9) upwards, The hydraulic oil also increases in current oil storage room (13)
Add；On the other hand, since spring c (14) coefficient of elasticity is much higher than spring b (11) coefficient of elasticity, although hydraulic pressure is at this time
Increase but insufficient pressure is to overcome spring c (14) pretightning force to open valve (15).Camshaft (7) continues to rotate, as cam a
(6) when basic circle section (601) moves to being in contact at the top of plunger a (4), spring a (2) elastic force pushes plunger a (4) to transport upwards at this time
Dynamic, Oil Guide annular groove (401) is no longer between oil duct a (502) and oil duct b (503), and hydraulic circuit is separated.At the same time, convex
Wheel b (8) molded line section (802) rotation is in contact to the top plunger b (9), and cam b (8) pushes down on plunger b (9) downlink, due to
Hydraulic oil is closed in oil storage room (13), with plunger b (9) moving downwardly together with oil baffle disc (12), oil storage room (13)
Middle hydraulic fluid pressure constantly increases.When hydraulic fluid pressure is increased to be enough to overcome spring c (14) pretightning force, valve (15) is in liquid
It is moved downward under the action of oil pressure, valve (15) is opened, as shown in Figure 2.Again because during this in oil storage room (13)
The hydraulic oil is increased than before, and earlier, valve stroke increases valve-opening time, realizes the function.
Claims (3)
1. a kind of automobile engine lift range variable regulating mechanism, it is characterised in that by cylinder cap (1), spring a (2), oil pressure tune
Save valve (3), plunger a (4), mounting blocks (5), cam a (6), camshaft (7), cam b (8), plunger b (9), block (10), spring
B (11), oil baffle disc (12), oil storage room (13), spring c (14), valve (15) composition, wherein mounting blocks (5) and cylinder cap are affixed, bullet
Spring a (2) is placed in the plunger mounting hole a (504) that mounting blocks (5) open up；(4) one end plunger a is slidably connected with cam a (6), and one
End is protruded into plunger mounting hole a (504), and is connected with spring a (2)；Oil pressure adjusting valve (3) is arranged in what mounting blocks (5) opened up
In regulating valve mounting hole (501)；Cam a (6) and cam b (8) is respectively and fixedly connected in camshaft (7) outer surface；Plunger b (9) with it is convex
Wheel b (8) is slidably connected, and the circular hole that the other end passes through block (10) centre stretches to the ladder-like column that mounting blocks (5) open up
It fills in mounting hole b (505)；Block (10) is connected by screw thread with mounting blocks (5), and oil baffle disc (12) is fixed in plunger b (9) appearance
Face；Spring b (11) is placed between block (10) and oil baffle disc (12)；Plunger a (4) matches with plunger mounting hole a (504) wall surface gap
It closes, plunger b (9), block (10) and oil baffle disc (12) gap same as valve and stepped plunger mounting hole b (505) wall surface are matched
It closes.
2. a kind of automobile engine lift range variable regulating mechanism according to claim 1, it is characterised in that the plunger a
(4) Oil Guide annular groove (401) are equipped with, the mounting blocks (5) are equipped with oil pressure adjusting valve mounting hole (501), oil duct a (502), oil duct b
(503), plunger mounting hole a (504), stepped plunger mounting hole b (505), wherein oil duct b (503) and plunger b (9), block
(12), the oil storage room (13) that valve (15) and stepped plunger mounting hole b (505) wall surface surround communicates；When plunger a (4) Oil Guide
Annular groove (401) comes downwards to oil duct a (502) and oil duct b (503) conducting when between oil duct a (502) and oil duct b (503), works as Oil Guide
Annular groove (401) leaves oil duct a (502) and oil duct b (503) when between oil duct a (502) and oil duct b (503) and disconnects.
3. a kind of automobile engine lift range variable regulating mechanism according to claim 1, it is characterised in that the cam a
(6) it is made of basic circle section a (601) and molded line section a (602), the cam b (8) is by basic circle section b (801) and molded line section b (802)
Composition；The position of molded line section b (802) and molded line section a (602) on camshaft (7) is on the contrary, work as cam b (8) molded line section b
(802) turn to cam a (6) basic circle section a (601) when plunger b (9) upper end turn to plunger a (4) upper end, as basic circle section b
(801) it turns to and is turned to and plunger a (4) upper end with molded line section a (602) when plunger b (9) upper end；Meanwhile as molded line section b
(802) when turning to plunger b (9) upper end, the Oil Guide annular groove (401) of plunger a (4) is not in oil duct a (502) and oil duct b (503)
Between, oil duct a (502) and oil duct b (503) are disconnected；When baseboard b (801) is turned to plunger b (9) upper end, plunger a (4)
Oil Guide annular groove (401) will be moved between oil duct a (502) and oil duct b (503), oil duct a (502) and oil duct b (503) conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821047241.1U CN208380652U (en) | 2018-07-03 | 2018-07-03 | A kind of automobile engine lift range variable regulating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821047241.1U CN208380652U (en) | 2018-07-03 | 2018-07-03 | A kind of automobile engine lift range variable regulating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN208380652U true CN208380652U (en) | 2019-01-15 |
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| CN201821047241.1U Active CN208380652U (en) | 2018-07-03 | 2018-07-03 | A kind of automobile engine lift range variable regulating mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691597A (en) * | 2018-07-03 | 2018-10-23 | 吉林大学 | A kind of automobile engine lift range variable regulating mechanism |
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2018
- 2018-07-03 CN CN201821047241.1U patent/CN208380652U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691597A (en) * | 2018-07-03 | 2018-10-23 | 吉林大学 | A kind of automobile engine lift range variable regulating mechanism |
| CN108691597B (en) * | 2018-07-03 | 2024-05-14 | 吉林大学 | Variable valve lift adjusting mechanism of automobile engine |
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