CN109736913A - VVH engine cam gap adjusting method - Google Patents
VVH engine cam gap adjusting method Download PDFInfo
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- CN109736913A CN109736913A CN201811609846.XA CN201811609846A CN109736913A CN 109736913 A CN109736913 A CN 109736913A CN 201811609846 A CN201811609846 A CN 201811609846A CN 109736913 A CN109736913 A CN 109736913A
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- rocker arm
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Abstract
The invention discloses a kind of VVH engine cam gap adjusting method, comprising steps of S1, tooling will be adjusted being installed on engine valve actuating mechanism；S2, rocker arm position adjusting mechanism and the cooperation for adjusting tooling by engine valve actuating mechanism, adjust the position of intake rocker；S3, it determines bearing center location information on engine valve actuating mechanism, calculates cam shaft clearance.VVH engine cam gap adjusting method of the invention can quickly and accurately complete camshaft and measure and adjust with gap work, improve adjusting and the detection working efficiency of VVH engine cam shaft clearance, guarantee the assembling quality and efficiency of engine.
Description
Technical field
The invention belongs to technical field of engines, specifically, the present invention relates to a kind of VVH engine cam shaft clearance tune
Section method.
Background technique
VVH engine (i.e. continuously variable valve lift engine) is a kind of hair of novel continuously adjustable valve stroke
Motivation, the main distinction of the engine and conventional engines in structure are to increase upper cylinder cover, rocker arm, VVH control on cylinder cap
The structures such as device processed, and there is the camshaft assembly and timing mechanism for being clearly distinguishable from conventional engines.Due in structure
Greatest differences cause to carry out in a conventional manner compared with Alternative.
The cam shaft clearance of VVH engine refer to exhaust cam shaft exhaust cam and sliding block (sliding block be mounted in into
A component on gas rocker arm) on bearing between gap.Relative to conventional engines (the cam shaft clearance of conventional engines
Refer to the gap between camshaft and valve tappet), the cam shaft clearance of VVH engine have position more it is remote it is narrow, with
The more intricate feature of other structures relationship can not be detected with traditional equipment or method.And cam shaft clearance pair
The performance of valve actuating mechanism or even entire engine is crucial, it is necessary to effectively be controlled.
And due to the particularity of VVH engine structure, when manual adjustment cam shaft clearance, needs more people to be completed at the same time, and influences
The assembling quality and efficiency of engine, it is difficult to realize volume production.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of VVH
Engine cam gap adjusting method, it is therefore an objective to improve the adjusting working efficiency of VVH engine cam shaft clearance.
To achieve the goals above, the technical scheme adopted by the invention is as follows: VVH engine cam gap adjusting method,
Comprising steps of
S1, adjusting tooling is installed on engine valve actuating mechanism；
S2, pass through the rocker arm position adjusting mechanism of engine valve actuating mechanism and the cooperation of adjusting tooling, adjusting intake rocker
Position；
S3, it determines bearing center location information on engine valve actuating mechanism, calculates cam shaft clearance.
The tooling that adjusts includes the valve simulation mechanism for adjusting frame and being set on adjusting frame.
The engine valve actuating mechanism includes upper cylinder cover ontology, and in the step S1, the adjusting frame is mounted on
On cylinder cap ontology, the intake rocker is between the valve simulation mechanism and the rocker arm position adjusting mechanism.
The lower section for adjusting tooling and being mounted on the engine valve actuating mechanism.
It is the adjusting bolt being threadedly coupled, the air inlet that the rocker arm position adjusting mechanism, which includes with the upper cylinder cover ontology,
Rocker arm is located at the valve simulation mechanism and adjusts between bolt.
In the step S2, the adjusting bolt is screwed using bolt regulating mechanism, makes to adjust bolt along its axially progress
It is mobile, carry out the adjusting of intake rocker height and position.
It is the locknut being threadedly coupled, the step that the rocker arm position adjusting mechanism, which further includes with the adjusting bolt,
In S3, after camshaft gap meets the requirements, adjusting bolt is secured the above using bolt regulating mechanism, is then tightened using nut
Mechanism screws locknut, until locknut is tightened, realizes the fixation for adjusting bolt.
In the step S3, using the coordinate value of multiple measurement points on probe detection bearing, all measurement point positions are in bearing
At circumferential different location on periphery；By the coordinate value of all measurement points, bearing center location information is determined, calculate cam
Shaft clearance.
In the step S3, the coordinate value of three measurement points on probe detection bearing is used.
In the step S3, if cam shaft clearance is undesirable, step S2~S3 is repeated, until camshaft gap meets
It is required that.
VVH engine cam gap adjusting method of the invention, can quickly and accurately complete camshaft and survey with gap
Amount and adjusting work improve adjusting and the detection working efficiency of VVH engine cam shaft clearance, guarantee the assembling quality of engine
And efficiency.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is VVH engine valve actuating mechanism and its explosive view for adjusting tooling；
Fig. 2 is the assembling schematic diagram of VVH engine valve actuating mechanism and section tooling；
Fig. 3 is the structural schematic diagram of Rocker arm assembly；
Fig. 4 is the cross-sectional view that structure shown in Fig. 2 is splitted along rocker arm median plane；
Fig. 5 is camshaft gap detection schematic diagram；
In the figure, it is marked as 1, upper cylinder half cap assembly；1A, upper cylinder cover ontology 1A；1B, rocker arm position adjusting mechanism；1BA, tightening
Nut；1BB, bolt is adjusted；2, exhaust cam shaft；2A, exhaust cam；3, admission cam shaft；3A, admission cam；4, camshaft
Lid；5, camshaft cover nut；6, Rocker arm assembly；7, rocker arm shaft-cup；8, rocker arm shaft bonnet bolt；9, tooling is adjusted；9A, conditioning box
Frame；9B, valve simulation mechanism；10, bolt；11, the front end of sub-assembly；12, the rear end of sub-assembly；13, rocker arm assembly；13A, into
Gas rocker arm；13B, sliding block assembly；13BA, sliding block；13BB, bearing；13C, spring；13D, exhaust rocker arm；14, it pops one's head in；15, nut
Tightening mechanism；16, bolt regulating mechanism.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.
As shown in Figures 1 to 5, the present invention provides a kind of VVH engine cam gap adjusting methods, including following
Step:
S1, adjusting tooling 9 is installed on engine valve actuating mechanism；
S2, rocker arm position adjusting mechanism 1B and the cooperation for adjusting tooling 9 by engine valve actuating mechanism, adjust air inlet and shake
The height and position of arm 13A；
S3, it determines bearing center location information on engine valve actuating mechanism, calculates cam shaft clearance.
Specifically, as shown in Figures 1 to 4, engine valve actuating mechanism mainly includes upper cylinder cover ontology 1A and is set to
Admission cam shaft, exhaust cam shaft, rocker arm position adjusting mechanism 1B and Rocker arm assembly on upper cylinder cover ontology 1A, admission cam shaft
Parallel with the axis of exhaust cam shaft, admission cam shaft is connect with exhaust cam shaft by transmission mechanism, which makes
Obtain admission cam shaft and exhaust cam shaft synchronous rotary.Multiple and all intake rocker 13A are arranged in upper cylinder cover in intake rocker 13A
It is sequentially arranged on ontology 1A for the length direction along upper cylinder cover ontology 1A, the length direction and admission cam shaft of upper cylinder cover ontology 1A
It is parallel with the axis of exhaust cam shaft.Rocker arm position adjusting mechanism 1B is also provided with multiple and rocker arm position adjusting mechanism 1B number
Measure it is identical with the quantity of intake rocker 13A, all rocker arm position adjusting mechanism 1B for along upper cylinder cover ontology 1A length direction according to
Secondary arrangement, each rocker arm position adjusting mechanism 1B are located at the top of an intake rocker 13A.
As shown in Figures 1 to 4, adjusting tooling 9 includes the valve simulation for adjusting frame 9A and being set on adjusting frame 9A
The effect of mechanism 9B, valve simulation mechanism 9B for the valve group of simulated engine, valve simulation mechanism 9B is for simulating valve
The course of work of group within the engine.In above-mentioned steps S1, frame 9A will be adjusted and be mounted on upper cylinder cover ontology 1A, air inlet is shaken
Arm 13A is located between valve simulation mechanism 9B and rocker arm position adjusting mechanism 1B.It adjusts frame 9A and is mounted on upper cylinder cover ontology 1A
Lower section, upper cylinder cover ontology 1A be placed on adjust frame 9A on, valve simulation mechanism 9B be arranged multiple and valve simulation mechanism 9B
Quantity it is identical as the quantity of rocker arm position adjusting mechanism 1B, all valve simulation mechanism 9B be along adjust frame 9A length side
To being sequentially arranged, the length direction for adjusting frame 9A is parallel with the length direction of upper cylinder cover ontology 1A, and each valve mould
Quasi- mechanism 9B is located at the lower section of an intake rocker 13A, and each intake rocker 13A is respectively by a valve simulation mechanism 9B
It is clamped with rocker arm position adjusting mechanism 1B.
Preferably, engine valve actuating mechanism is to be mounted on to adjust in tooling 9 by bolt 10, easy disassembly.Accordingly
, upper cylinder cover ontology 1A has the through-hole for allowing bolt 10 to pass through, and adjusting frame 9A has the internal thread hole for allowing bolt 10 to be inserted into.Hair
After motivation valve actuating mechanism and adjusting tooling 9 are assembled, sub-assembly as shown in Figure 2 is formed, which has 11 He of front end
One rear end 12, on complete VVH engine, front end 11 will install VVT timing mechanism, and rear end 12 will install VVH control dress
It sets.
As shown in Figures 1 to 4, Rocker arm assembly 6 is mainly including a rocker arm shaft and the multiple rocker arms being set on rocker arm shaft
Component 13, rocker arm shaft is mounted on the inside of upper cylinder cover ontology 1A and rocker arm shaft is located under admission cam shaft and exhaust cam shaft
Side, the axis of rocker arm shaft are parallel with the axis of admission cam shaft and exhaust cam shaft.Rocker arm assembly 13 is arranged multiple and all
Rocker arm assembly 13 is sequentially arranged for the axial direction along rocker arm shaft, the quantity of rocker arm assembly 13 and the quantity of rocker arm position adjusting mechanism 1B
It is identical.Rocker arm assembly 13 includes the intake rocker 13A that is rotatably arranged on rocker arm shaft and exhaust rocker arm 13D, moveable
The sliding block 13BA that is set on intake rocker 13A, it is set on sliding block 13BA and is used for and admission cam shaft and exhaust cam shaft
The bearing being in contact and the spring 13C to sliding block 13BA application elastic acting force, spring 13C are arranged on intake rocker 13A.
Bearing is needle bearing, and the top of intake rocker 13A is arranged in sliding block 13BA.When admission cam shaft and exhaust cam shaft rotate,
Sliding block 13BA can be driven to be slided on intake rocker 13A, the glide direction of sliding block 13BA is the length side of intake rocker 13A
To the length direction of intake rocker 13A and the axis perpendicular of rocker arm shaft.Spring 13C be cylindrically coiled spring, 13C pairs of spring
The active force that sliding block 13BA applies is for resetting sliding block 13BA.
As shown in Figures 1 to 4, admission cam shaft is equipped with admission cam 3A, and exhaust cam shaft is equipped with exhaust cam 2A,
The outer circle face contact of admission cam 3A and exhaust cam 2A and bearing, bearing are located under admission cam 3A and exhaust cam 2A
Side.Rocker arm position adjusting mechanism 1B play the role of adjust intake rocker 13A height, rocker arm position adjusting mechanism 1B include with
Upper cylinder cover ontology 1A is that adjusting the bolt 1BB, intake rocker 13A being threadedly coupled are located at valve simulation mechanism 9B and adjust bolt
Between 1BB, upper cylinder cover ontology 1A, which has to allow, adjusts the internal thread hole that bolt 1BB is passed through, and one end of intake rocker 13A, which is located at, to be adjusted
The other end of the lower section of bolt 1BB, intake rocker 13A is sheathed on rocker arm shaft, is adjusted bolt 1BB and is vertically arranged.Adjust spiral shell
Bolt 1BB hexagon socket head cap screw adjusts the lower end of bolt 1BB for being in contact with intake rocker 13A, and the upper end for adjusting bolt 1BB is set
There is hexagonal hole.Valve simulation mechanism 9B provides intake rocker 13A upward elastic reaction in the lower section of intake rocker 13A
Power, when adjusting bolt 1BB is moved down, adjusting bolt 1BB can push intake rocker 13A to be rotated down, intake rocker 13A
Valve simulation mechanism 9B is squeezed simultaneously；When adjusting bolt 1BB is moved up, under the action of valve simulation mechanism 9B, valve
Simulation mechanism 9B pushes intake rocker 13A to rotate upwards.
As shown in figure 4, screwing using bolt regulating mechanism 16 in above-mentioned steps S2 and adjusting bolt 1BB, make to adjust bolt
1BB is moved along its axial direction, carries out the adjusting of intake rocker 13A height and position.By manipulating bolt regulating mechanism 16, screw
Adjust bolt 1BB, make to adjust bolt 1BB lower movement vertically in the internal thread hole of upper cylinder cover ontology 1A, and with valve mould
Quasi- mechanism 9B is matched, and realizes the adjusting of the height and position of intake rocker 13A.When work, bolt regulating mechanism 16 is inserted into
It adjusts in the hexagonal hole being arranged at the upper end center of bolt 1BB, by rotating bolt regulating mechanism 16, by bolt regulating mechanism
16 drive adjusting bolt 1BB synchronization to be rotated around its axis.Bolt regulating mechanism 16 has diversified forms, such as uses interior hexagonal
Allen wrench is inserted into the hexagonal hole for adjusting bolt 1BB by spanner, applies rotary force to allen wrench, by interior six
Angle spanner, which screws, adjusts bolt 1BB, and structure is simple, easy to operate.
As shown in figure 4, rocker arm position adjusting mechanism 1B further includes and adjusts bolt 1BB to be the locknut being threadedly coupled
1BA after camshaft gap meets the requirements, is fixed using bolt regulating mechanism 16 in above-mentioned steps S3 and is adjusted bolt 1BB,
Then locknut 1BA is screwed using nut Auto-lock Machine structure 15, until locknut 1BA is tightened, realizes and adjust bolt 1BB's
It is fixed.Locknut 1BA is sheathed on the top for adjusting bolt 1BB, and locknut 1BA is located at setting in upper cylinder cover ontology 1A
The top of internal thread hole will adjust bolt 1BB and be fixed on upper cylinder cover ontology 1A, after fixed by locking locknut 1BA
It adjusts bolt 1BB and position-limiting action is played to intake rocker 13A.Locknut 1BA is hex nut, and nut Auto-lock Machine structure 15 has
Diversified forms, such as use sleeve, and the inside of sleeve has the hexagonal hole for accommodating locknut 1BA, the shape of the hexagonal hole
Match with the shape of locknut 1BA, and sleeve is the structure of both ends open and inner hollow, hexagonal hole is in sleeve
The centre bore being arranged at portion center, bolt regulating mechanism 16 can pass through the centre bore of sleeve.When work, mechanism that nut is tightened
15 sets on locknut 1BA, bolt regulating mechanism 16 are inserted into the centre bore of nut Auto-lock Machine structure 15, nut Auto-lock Machine structure
15 do not influence the rotation of bolt regulating mechanism 16, and bolt regulating mechanism 16 nor affects on the rotation of nut Auto-lock Machine structure 15.Pass through
Rotary force is applied to nut Auto-lock Machine structure 15, drives locknut 1BA into screwing by nut Auto-lock Machine structure 15, tightens locknut
1BA realizes the fixation for adjusting bolt 1BB.
In above-mentioned steps S3, probe 14 is inserted between exhaust cam shaft and admission cam shaft, is examined using probe 14
The coordinate value of multiple measurement points on bearing is surveyed, all measurement point positions are at the circumferential different location on bearing top circle face；Pass through institute
There is the coordinate value of measurement point, determine bearing center location information, calculates cam shaft clearance.
In the present embodiment, as shown in figure 5, in above-mentioned steps S3, three measurement points on bearing are detected using probe 14
Coordinate value, three measurement points are respectively a measurement point, b measurement point and c measurement point, and a measurement point, b measurement point and c measurement point are
It is circumferentially sequentially arranged on the periphery of bearing.By the bearing of the alignment of probe 14 lower section, bolt regulating mechanism 16 is aligned and is adjusted
Bolt 1BB is saved, mechanism that nut is tightened 15 is directed at locknut 1BA, rotates exhaust cam shaft, and admission cam shaft rotates synchronously,
(set angle α refers to that exhaust cam shaft is rotated to the lift for making exhaust cam 2A after exhaust cam shaft rotates set angle α
The angle that circle rotates when being located at bearing top position), it stops operating, 14 downlinks of then popping one's head in simultaneously detect a measurement point, b respectively
The coordinate value of measurement point and c measurement point can directly determine the position of the center of circle A of bearing by tri- measurement points of a, b, c.Due to row
The center of circle B of gas cam 2A be always it is fixed, so cam shaft clearance x=AB-RA-RB, AB refer to bearing the center of circle and exhaust it is convex
Take turns the distance between the center of circle of 2A, RAIt is the radius (namely maximum radius of the outer ring of bearing) of the periphery of bearing, RBIt is exhaust
The radius of the lift circle of cam 2A, RoIt is the radius of the basic circle of exhaust cam 2A.It should be noted that bearing is convex by intake and exhaust
The collective effect of wheel, during cam axle, bearing is not to contact with exhaust cam 2A at the moment, between generating between the two
Gap.
In above-mentioned steps S3, if cam shaft clearance is undesirable, step S2~S3 is repeated, until camshaft gap character
It closes and requires.Measurement cam shaft clearance, which needs to adjust repeatedly by bolt regulating mechanism 16, adjusts bolt 1BB, and gap x is made to meet work
Skill requirement also needs to adjust basic circle gap in the same way after having adjusted lift circle gap, it is made also to meet technique requirement.It is convex
Wheel shaft gap adjustment locks locknut 1BA to after meeting the requirements, and will adjust bolt 1BB and is fixed on upper cylinder cover ontology 1A.Such as
This is repeatedly adjusted the valve clearance in 4 cylinder holes, it is ensured that all meets the requirements.
Process adjustments and detection valve clearance in through the invention, can cut down the number of intermediate links to the greatest extent, avoid tiring out
It is uncertain to count error bring, quickly and accurately completes camshaft and measures and adjust with gap work, guarantee the dress of engine
With quality and efficiency.And the technique can be measured directly compared with multi-parameter, roundabout process than traditional approach it is few very much, effectively
Ground ensure that the accuracy of result, so that the qualification rate of Primary regulation be greatly improved.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (10)
1.VVH engine cam gap adjusting method, which is characterized in that comprising steps of
S1, adjusting tooling is installed on engine valve actuating mechanism；
S2, rocker arm position adjusting mechanism and the cooperation for adjusting tooling by engine valve actuating mechanism, adjust the position of intake rocker
It sets；
S3, it determines bearing center location information on engine valve actuating mechanism, calculates cam shaft clearance.
2. VVH engine cam gap adjusting method according to claim 1, which is characterized in that the adjusting tooling
Including adjusting frame and being set to the valve simulation mechanism adjusted on frame.
3. VVH engine cam gap adjusting method according to claim 2, which is characterized in that the engine is matched
Mechanism of qi structure includes upper cylinder cover ontology, in the step S1, the adjusting frame is mounted on upper cylinder cover ontology, the air inlet is shaken
Arm is between the valve simulation mechanism and the rocker arm position adjusting mechanism.
4. VVH engine cam gap adjusting method according to any one of claims 1 to 3, which is characterized in that the tune
Section tooling is mounted on the lower section of the engine valve actuating mechanism.
5. VVH engine cam gap adjusting method according to claim 3 or 4, which is characterized in that the rocker arm position
It is the adjusting bolt being threadedly coupled that set regulating mechanism, which include with the upper cylinder cover ontology, and the intake rocker is located at the valve mould
Between quasi- mechanism and adjusting bolt.
6. VVH engine cam gap adjusting method according to claim 5, which is characterized in that in the step S2,
The adjusting bolt is screwed using bolt regulating mechanism, adjusting bolt is moved along its axial direction, carries out intake rocker height
The adjusting of position.
7. VVH engine cam gap adjusting method according to claim 6, which is characterized in that the rocker arm position
It is the locknut being threadedly coupled that regulating mechanism, which further includes with the adjusting bolt, and in the step S3, camshaft gap meets
After it is required that, adjusting bolt is secured the above using bolt regulating mechanism, then screws locknut using nut Auto-lock Machine structure, directly
To locknut is tightened, the fixation for adjusting bolt is realized.
8. VVH engine cam gap adjusting method according to any one of claims 1 to 7, which is characterized in that the step
In rapid S3, using the coordinate value of multiple measurement points on probe detection bearing, all measurement point positions are in the circumferential direction on bearing top circle face
At different location；By the coordinate value of all measurement points, bearing center location information is determined, calculate cam shaft clearance.
9. VVH engine cam gap adjusting method according to claim 8, which is characterized in that in the step S3,
Use the coordinate value of three measurement points on probe detection bearing.
10. VVH engine cam gap adjusting method according to any one of claims 1 to 9, which is characterized in that described
In step S3, if cam shaft clearance is undesirable, step S2~S3 is repeated, until camshaft gap meets the requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811609846.XA CN109736913A (en) | 2018-12-27 | 2018-12-27 | VVH engine cam gap adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811609846.XA CN109736913A (en) | 2018-12-27 | 2018-12-27 | VVH engine cam gap adjusting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109736913A true CN109736913A (en) | 2019-05-10 |
Family
ID=66361367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811609846.XA Pending CN109736913A (en) | 2018-12-27 | 2018-12-27 | VVH engine cam gap adjusting method |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008180216A (en) * | 2006-12-28 | 2008-08-07 | Mazda Motor Corp | Valve clearance adjustment method of engine and its device |
| CN101970978A (en) * | 2008-03-29 | 2011-02-09 | 平田机工株式会社 | Clearance measuring method and measuring unit |
| CN102149902A (en) * | 2008-09-08 | 2011-08-10 | 平田机工株式会社 | Method and device for measuring and adjusting valve clearance |
| CN104895632A (en) * | 2015-04-16 | 2015-09-09 | 奇瑞汽车股份有限公司 | Roller rocking arm air valve mechanism with mechanically adjustable air valve gap |
-
2018
- 2018-12-27 CN CN201811609846.XA patent/CN109736913A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008180216A (en) * | 2006-12-28 | 2008-08-07 | Mazda Motor Corp | Valve clearance adjustment method of engine and its device |
| CN101970978A (en) * | 2008-03-29 | 2011-02-09 | 平田机工株式会社 | Clearance measuring method and measuring unit |
| CN102149902A (en) * | 2008-09-08 | 2011-08-10 | 平田机工株式会社 | Method and device for measuring and adjusting valve clearance |
| CN104895632A (en) * | 2015-04-16 | 2015-09-09 | 奇瑞汽车股份有限公司 | Roller rocking arm air valve mechanism with mechanically adjustable air valve gap |
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