CN108691597A - A kind of automobile engine lift range variable regulating mechanism - Google Patents
A kind of automobile engine lift range variable regulating mechanism Download PDFInfo
- Publication number
- CN108691597A CN108691597A CN201810720689.3A CN201810720689A CN108691597A CN 108691597 A CN108691597 A CN 108691597A CN 201810720689 A CN201810720689 A CN 201810720689A CN 108691597 A CN108691597 A CN 108691597A
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- Prior art keywords
- plunger
- oil
- oil duct
- cam
- valve
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
Abstract
The invention discloses a kind of automobile engine lift range variable regulating mechanisms, for realizing the soft readjustment and control of valve lift parameter, including:Cam a, plunger a, oil pressure adjusting valve, spring a etc..When the hydraulic pressure 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 accumulator at this time, due to the difference of hydraulic fluid pressure in accumulator, oil baffle disc, plunger b and spring a and the position balanced of hydraulic oil in accumulator are just different, and The hydraulic oil is also different in accumulator.When hydraulic pressure oil duct is closed, cam b molded line section pushes plunger b downlinks at this time, and hydraulic fluid pressure gradually rises in accumulator, and when pressure reaches certain value, hydraulic fluid pressure overcomes spring c pretightning forces to push valve downlink, opens valve.Due to the difference of The hydraulic oil in accumulator during previous, valve lift amount also changes at this time, and simple in structure to be illustrated, feasibility is good.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to technical field of engines, more particularly, to a kind of valve liter
Journey regulating mechanism.
Background technology
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 lifted is opened, decisive role is played to the intake and exhaust amount of engine each work period.
For different engine operating conditions, realize that different valve strokes is conducive to make engine all work under each operating mode
Make in perfect condition.For example, when engine is under the lower operating mode of rotating speed, smaller valve stroke is conducive to increase in cylinder
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 rotating speed
When under condition, larger valve stroke advantageously reduces intake resistance, to greatly improve air inflow, promotes engine in high rotating speed
Under power output.
Therefore, if a kind of regulating mechanism of lift range variable can be realized, engine performance will preferably be improved.
Invention content
It is an object of the invention to overcome the shortcomings of existing technology, a kind of lift range variable regulating mechanism is provided, it can
It solves the problems, such as that engine parameter fixation is brought, realizes the soft readjustment and control of valve lift parameter, and then engine is made to exist
It is owned by a good distribution effect under each operating mode, improves engine performance.
The present invention 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), block
(10), spring b (11), oil baffle disc (12), accumulator (13), spring c (14), valve (15) composition, wherein mounting blocks (5) and cylinder
Cover affixed, spring a (2) is placed in plunger mounting hole a (504) that mounting blocks (5) open up;(4) one end plunger a is sliding with cam a (6)
Dynamic connection, one end is stretched into plunger mounting hole a (504), and is connected with spring a (2);Oil pressure adjusting valve (3) is arranged in mounting blocks
(5) in the regulating valve mounting hole (501) opened up;Cam a (6) and cam b (8) is respectively and fixedly connected in camshaft (7) outer surface;Plunger
B (9) and cam b (8) is slidably connected, and the other end passes through the circular hole in block (10) centre to stretch to what mounting blocks (5) opened up
In stepped plunger 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) 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
Face clearance fit, plunger b (9), block (10) and oil baffle disc (12) and valve and stepped plunger mounting hole b (505) wall surface are same
Sample 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) is surrounded with plunger b (9), block (12), valve (15) and stepped plunger mounting hole b (505) wall surface
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) compositions;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) will be moved between oil duct a (502) and oil duct b (503), oil
Road a (502) and oil duct b (503) conductings.
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 pressure oil duct of accumulator (13), vehicle-mounted ECU obtains optimal valve lift amount according to current working, thus calculates
Go out required hydraulic fluid pressure, hydraulic fluid pressure in accumulator (13) is controlled by oil pressure adjusting valve (3).Due in accumulator (13)
The presence of hydraulic fluid pressure, spring b (11) elastic force keep balancing with hydraulic fluid pressure in accumulator (13), at this time oil baffle disc
(12), plunger b (9) floats on hydraulic oil upper surface in accumulator (13).Since spring c (14) coefficient of elasticity is far above spring b
(11), therefore at this time spring c (14) does not generate apparent displacement.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 controls hydraulic fluid pressure in accumulator (13) by oil pressure adjusting valve (3).If needing to increase valve lift amount at this time,
When hydraulic oil enters accumulator (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 accumulator (13).Accumulator
(13) change of The hydraulic oil makes 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 accumulator (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 bigger of valve (15), 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 accumulator to be accurately controlled, realizes lift range variable.Engine need change valve stroke to
When adjusting air inflow, when hydraulic pressure oil duct is opened, ECU obtains current working optimal valve liter according to prefabricated valve stroke MAP chart
Thus Cheng Liang calculates the required hydraulic fluid pressure reached needed for this valve lift amount, and then pass through oil pressure adjusting valve (3) and adjust
Hydraulic fluid pressure in accumulator (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 accumulator (13), on the one hand, since spring b (11) coefficient of elasticity is relatively low, when in accumulator (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 accumulator (13);On the other hand, since spring c (14) coefficient of elasticity is far above spring b (11) bullet
Property coefficient, although hydraulic pressure increased insufficient pressure to overcome spring c (14) pretightning forces to open valve (15) at this time.
When hydraulic pressure 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 constantly increases, when hydraulic fluid pressure reaches certain value
When, hydraulic fluid pressure overcomes spring c (14) pretightning forces to open valve (15).
The prior art is compared, lift range variable regulating mechanism of the present invention has the advantage that:
The present invention realizes the function of the lift parameter soft readjustment of valve, and effectively improving traditional valve actuating mechanism cannot
The shortcomings that valve opening being adjusted with the change of engine operating condition.It ensure that engine can obtain one under any operating mode
Preferable distribution effect, improves the dynamic property and economy of engine, reduces the discharge of noxious pollutant.
Description of the drawings
Fig. 1 is the lift range variable regulating device structural schematic diagram a of the present invention
Fig. 2 is the lift range variable regulating device structural schematic diagram b of the present invention
Fig. 3 is the plunger a sectional views of the present invention
Fig. 4 is the mounting blocks sectional view of the present invention
Fig. 5 is the cam a sectional views of the present invention
Fig. 6 is the cam b sectional views of the present invention
Wherein:1. 6. cam a of cylinder cap 2. spring a, 3. oil pressure adjusting valve, 4. plunger a, 5. mounting blocks, 7. camshafts 8.
15. valves of cam b 9. plunger b, 10. block, 11. spring b, 12. oil baffle disc, 13. accumulator, 14. spring c, 401. Oil Guide
504. plunger mounting hole a of annular groove 501. regulating valve mounting hole, 502. oil duct a, 503. oil duct b, 505. stepped plungers are installed
Hole b
Specific implementation mode
Below against attached drawing, each component for example involved to the specific implementation mode of the present invention, between various pieces
Mutual alignment and interconnected relationship, function and operation principle of each section etc. are 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), accumulator (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 stretched 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 other end passes through the circular hole in block (10) centre to stretch 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 plunger a (4) one end 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 accumulator (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) conductings 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, when normal working of engine, cam a (6), cam b (8) follow camshaft (7) to rotate, cam a
(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
It the rotation of cam a (4) and gradually increases, 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), the hydraulic circuit being made of oil duct a (502), Oil Guide annular groove (401), oil duct b (503) is made to lead
It is logical, to realize control of the oil pressure adjusting valve (3) to hydraulic fluid pressure in accumulator (13).Vehicle-mounted ECU is obtained according to current working
Go out optimal valve lift amount, thus calculate required hydraulic fluid pressure, liquid in accumulator (13) is controlled by oil pressure adjusting valve (3)
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 far above spring b (11), at this time bullet
Spring c (14) does not generate apparent displacement.
As shown in Fig. 2, continuing to rotate with camshaft (7), cam a (6) molded line section (602) leaves the tops plunger a (4)
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 accumulator (13).Due to cam b (8) with it is convex
Wheel a (6) direction 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 processes, and due to the presence of hydraulic oil in accumulator (13), convex
During taking turns b (8) promotion plunger b (9) downlinks, the continuous raising of hydraulic fluid pressure, when hydraulic fluid pressure reaches certain value, liquid
Oil pressure overcomes spring c (14) pretightning forces to open valve (15).
If engine operating condition changes, when needing to change valve stroke to adjust air inflow, when hydraulic pressure oil duct is opened
When, ECU obtains current working optimal valve lift amount according to prefabricated valve stroke MAP chart, thus calculate needed for reach this gas
Hydraulic fluid pressure needed for door lift amount, and then hydraulic fluid pressure in accumulator (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 accumulator (13) in hydraulic fluid pressure liter
It is high, on the one hand, since spring b (11) coefficient of elasticity is relatively low, when hydraulic fluid pressure increases in accumulator (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 accumulator (13)
Add;On the other hand, since spring c (14) coefficient of elasticity is far above spring b (11) coefficient of elasticity, although hydraulic pressure is at this time
Increase but insufficient pressure is to overcome spring c (14) pretightning forces 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), which is rotated to the tops plunger b (9), to be in contact, and cam b (8) pushes down on plunger b (9) downlink, due to
Hydraulic oil is closed in accumulator (13), with plunger b (9) moving downwardly together with oil baffle disc (12), accumulator (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 accumulator (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), accumulator (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 stretched 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 other end passes through the circular hole in block (10) centre to stretch 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 surfaces are matched
It closes.
2. a kind of automobile engine lift range variable regulating mechanism as described in claim 1, it is characterised in that the plunger a
(4) it is equipped with Oil Guide annular groove (401), 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 accumulator (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) conductings 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 as described in 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 |
|---|---|---|---|
| CN201810720689.3A CN108691597A (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 |
|---|---|---|---|
| CN201810720689.3A CN108691597A (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 |
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| CN108691597A true CN108691597A (en) | 2018-10-23 |
Family
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| CN201810720689.3A Pending CN108691597A (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 |
|---|---|---|---|---|
| CN111188662A (en) * | 2020-01-07 | 2020-05-22 | 绵阳华博精工机械有限公司 | Valve mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188662A (en) * | 2020-01-07 | 2020-05-22 | 绵阳华博精工机械有限公司 | Valve mechanism |
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