CN108661745A - A kind of electromagnetic control type engine braking apparatus - Google Patents
A kind of electromagnetic control type engine braking apparatus Download PDFInfo
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- CN108661745A CN108661745A CN201810749212.8A CN201810749212A CN108661745A CN 108661745 A CN108661745 A CN 108661745A CN 201810749212 A CN201810749212 A CN 201810749212A CN 108661745 A CN108661745 A CN 108661745A
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- rocker arm
- engine braking
- type engine
- control type
- electromagnetic control
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- 239000010721 machine oil Substances 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 6
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- 238000005299 abrasion Methods 0.000 description 2
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Classifications
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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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
A kind of electromagnetic control type engine braking apparatus.It is characterized in that：Including rocker arm shaft, camshaft, exhaust rocker arm, auxiliary rocker arm, air valve bridge, elastic component, sliding pin, electromagnetic drive mechanism, electromagnetic drive mechanism includes at least a mandril that can be moved up and down, and by electromagnetic controller control action, with the second position for keeping the first position of certain interval with sliding pin and being kept in contact with sliding pin, when in first position, auxiliary rocker arm will not act first row valve, when in the second position, auxiliary rocker arm can open first row valve, realize engine braking or internal EGR.It the advantage is that：Increase an auxiliary rocker arm, and setting is by the electromagnetic drive mechanism of electromagnetic controller control action, existing use machine oil is substituted as work or drive control medium, eliminate the security risk that machine oil is brought, increase engine braking using area, it reduces engine braking and enters into and exits from the time, reduce fuel consumption, engine braking performance classification is made more to refine.
Description
Technical field
The present invention applies on medium and heavy diesel oil and natural gas engine, provides a kind of electromagnetic control type engine braking
Device.
Background technology
China mountain range is numerous, and mountain area area is vast, accounts for about the 69% of territory total area, heavy goods vehicle is in the long downhill path in mountain area
Section, driver frequently use service brake, and running brake can absorb large energy in a short time, but with braking time
Increase, surface of friction pair temperature between brake drum and shoe brake increases, and friction coefficient reduces, and ultimately causes brake efficiency
The unsafe condition for declining even brake failure, causes major traffic accidents.In order to improve the driving safety of heavy type commercial automobile,
It needs to increase auxiliary braking system on the basis of service brake, to ensure vehicle during descending with sustained
Brake force.
Automobile-used auxiliary braking system is broadly divided into two classes：Retarder and engine braking system.Engine braking system by
The advantages that simple in structure in its, easy for installation, cheap, is used widely.
Engine braking technology refers to that driver lifts accelerator pedal in vehicle traveling process, loosens the clutch, utilizes hair
Generated resistance to compression pression and intake and exhaust resistance and frictional force are formed by braking masterpiece to driving wheel in motivation compression travel
With being allowed to brake automobile.Engine braking technology is divided into Compression Engine braking, deflation type engine braking and portion
Divide three kinds of deflation type engine braking.Compression Engine braking is to open exhaust valve or auxiliary gas near
Door；Deflation type engine braking is to open exhaust valve in entire cycle of engine；Part deflation type engine braking is to start
Most of stroke of machine cycle opens exhaust valve.The application of engine braking technology efficiently reduces using frequently for running brake
Rate, vehicle, using engine braking, can use braking at precipitous road surfaces such as lower long slope, rugged hill paths to avoid because of long-time
Device causes the temperature of brake bush to increase, and brake force is made to decline or even ineffective.
Engine braking apparatus is capable of providing one or multiple auxiliary valve lifts, for realizing engine braking work(
Energy.Has the application that multiple patents of invention are related to technique at present, it includes additional one that major technique, which is outside the main lift of cam,
A or several auxiliary lifts can also increase a cam dedicated for braking and start mechanism according to engine requirements of one's work
Dynamic device makes auxiliary lifts work（Realize engine braking function）Or it is made not work.
Patent CN200980158946.8 is the dedicated rocking arm h type engine h system of Jacobs Vehicle Systems Inc.'s application
Dynamic device, a kind of system of driving engine exhaust port of the disclosure of the invention, the system comprises rocker arm shafts, have control fluid
Supply passageway and exhaust rocker arm, are pivotably mounted on rocker arm shaft.Brake rocker arm of engine can have：Central opening,
The hydraulic path that central opening is connect with control valve, and fluid passage that control valve is connect with action piston assembly.Specially
Sharp CN201080019296.1 is being opened in advance for engine braking and exhaust for Jacobs Vehicle Systems Inc.'s application
Lost motion changeable air valve braking system, the system may include the first cam, and first cam has compression release projection portion
Divide and prerelease door opens projection portion, the prerelease door opens projection portion and is connected to the hydraulic pressure with the first rocking arm
In lost motion system.The piston of hydraulic way actuating can selectively extend from the hydraulic lost motion system, with to the exhaust
Door provides compression release braking or prerelease door opens braking.The piston of hydraulic way actuating can be used as MS master-slave piston to return
Relay piston in road is arranged in fixed shell, alternatively, being slidably disposed at rocking arm alternatively as hydraulic piston
In；Patent CN200910140026.5 is the hair with valve additional control unit of Man Nutzfahrzeuge AG's application
Motivation brake apparatus and method for engine braking, the exhaust valve of the brake apparatus include a hydraulic air by means of one
The bindiny mechanism of the machinery of door Auxiliary Control Element is connected with camshaft.Hydraulic valve Auxiliary Control Element protects exhaust valve
It holds in temporary open position.Hydraulic valve Auxiliary Control Element can by means of one relative to internal combustion engine main oil return line it is additional
The auxiliary oil return line of setting is switched on and off.
Engine braking patent described above is all the braking using engine motor oil as the medium for transmitting valve motion rule
The characteristics of motion of valve is largely dependent upon some characteristics of machine oil, when as excessively high such as machine oil void fraction, braking valve lift
It can lose, to influence braking ability.In addition, when oil temperature is too low, when engine oil viscosity is excessively high, engine braking can be also influenced
Normal work.Therefore, the above engine braking technology requires that oil temperature is higher than some limit value（Such as 40 DEG C）When, engine
Braking could intervene, thus it is so also can limit value engine braking applying working condition.For another example use machine oil driving starts mechanism
Dynamic, engine braking intervention and the time exited are generally longer（＞ 0.4s）, engine braking and fired state are turned in this way
The process of changing has an impact, and causes engine transient transfer process unstable.
Invention content
In order to overcome the shortcomings of that background technology, the present invention provide a kind of electromagnetic control type engine braking apparatus.
The technical solution adopted in the present invention：A kind of electromagnetic control type engine braking apparatus, including first row valve,
Two exhaust valves further include：
Rocker arm shaft；
Camshaft, it is parallel with rocker arm shaft, and with the first cam and the second cam being adjacently positioned；
Exhaust rocker arm is rotatably installed on rocker arm shaft, and its rear end is corresponding with the first cam；
Auxiliary rocker arm is rotatably installed on rocker arm shaft, and adjoining with exhaust rocker arm, and its rear end is opposite with the second cam
It answers；
Air valve bridge is horizontally set on first row valve and second row valve, and is fixedly connected with exhaust rocker arm front end, can shake exhaust
Arm is pressed onto and the first cam contact；
Auxiliary rocker arm can be pressed onto and the second cam contact by elastic component；
Sliding pin is arranged in air valve bridge, and described sliding pin one end and first row valve contacts, the other end are pierced by air valve bridge；
Electromagnetic drive mechanism, setting is corresponding with sliding pin in auxiliary rocker arm front end, and the electromagnetic drive mechanism includes at least one
The mandril that can be moved up and down, and by electromagnetic controller control action, the mandril has keeps the first of certain interval with sliding pin
Position and the second position being kept in contact with sliding pin.
The Electromagnetic Control mechanism further includes push rod, sleeve, spring, spring base；The sleeve is fixedly mounted on auxiliary and shakes
Arm front end, inner wall are equipped with the circumferentially uniformly distributed second sliding slot of N groups circumferentially uniformly distributed the first sliding groove and N groups, the first sliding groove
It is spaced apart with second sliding slot so that positioning convex platform, the positioning convex platform bottom are formed between the first sliding groove and second sliding slot
Portion forms the first ramp structure, wherein a diameter of A of the first sliding groove, is B between second sliding slot, and A ＞ B, N >=3；
The push rod is mounted in sleeve, and the push rod external circumferential is uniformly arranged 2N the first bar shaped boss, and first bar shaped is convex
Platform is respectively embedded into the first sliding groove in second sliding slot, can move up and down along the first sliding groove and second sliding slot, the push rod lower face
It is formed with circumferentially uniformly distributed broached-tooth design；The mandril is mounted in sleeve and is located at push rod lower end, the mandril external circumferential
It is uniformly arranged N number of second bar shaped boss, a diameter of C of second bar shaped boss, and A ＞ C ＞ B, second bar shaped boss
In the embedded the first sliding groove of energy, the second ramp structure is formed at the top of second bar shaped boss；The spring base is fixed on sleeve bottom
Portion, the spring are set on mandril, and its both ends is inconsistent with spring base and mandril respectively；The electromagnetic controller is mounted on
It above sleeve, and is in contact with push rod upper surface, the mandril lower end passes through spring base corresponding with sliding pin.
The first sliding groove is equipped with 4 groups with second sliding slot, and first bar shaped boss is equipped with 8, second bar shaped
Boss is equipped with 4.
The sleeve is equipped with card slot close to the position of bottom, and clamp spring is equipped in the card slot, and the spring base is mounted on card
On spring.
The auxiliary rocker arm front end is equipped with threaded hole, and the cartridge exterior is formed with external thread structure, and the sleeve passes through
Screw-thread fit is fixedly installed in threaded hole.
It is protruded from the top of threaded hole at the top of the sleeve, is fixed and locked by fastening nut.
Second cam includes basic circle and one or more peach.
The peach includes a braking peach and an EGR peach or BGR peaches.
The auxiliary rocker arm rear end to side set there are one protrusion；The elastic component uses leaf spring, and one end, which is fixed, presses
On rocker arm shaft, the other end is pressed in protrusion, make auxiliary rocker arm always with the second cam contact.
The protrusion is cylinder.
It is equipped with oil circuit in the rocker arm shaft, the lubricant passage way that can be connected to oil circuit, the lubrication are equipped in the auxiliary rocker arm
Oil circuit leads to electromagnetic drive mechanism.
The exhaust rocker arm rear end is equipped with the first idler wheel, first idler wheel and the first cam contact.
The auxiliary rocker arm rear end is equipped with the second idler wheel, second idler wheel and the second cam contact.
The exhaust rocker arm front end is fixedly connected with adjustment bolt, and the adjustment bolt lower end passes through image angle and valve bridging
It connects.
The adjustment bolt upper end is protruded from the top of exhaust rocker arm front end, and is locked by locking nut.
The course of work of above-mentioned electromagnetic control type engine braking apparatus：
When engine work, mandril is in first position under the control of electromagnetic controller, between keeping certain with sliding pin
Gap does not work to first row valve；
When electromagnetic control type engine braking apparatus works, mandril is in the second position under the control of electromagnetic controller, with
Sliding pin contacts, and the action of auxiliary rocker arm can then open first row valve, realize engine braking or internal EGR；
When electromagnetic control type engine braking apparatus does not work, mandril returns to first position under the control of electromagnetic controller,
Certain interval is kept with sliding pin, is not worked to first row valve.
The beneficial effects of the invention are as follows：1, the security risk brought using machine oil is eliminated：Engine braking apparatus uses
Electromagnetic controller drives, when eliminating engine start, due to engine oil viscosity is high, engine oil pressure greatly caused by braking function open by mistake and open
And the unstable idle speed that brings and emit white cigarette problem；
2, increase engine braking using area：Current fluid pressure type or solid chain type engine braking are due to the use of machine oil as work
Make medium, oil temperature and engine oil pressure there are certain requirements, engine braking just can be with when such as requiring 40 DEG C of oil temperature ＞
Intervention uses engine braking when just starting which limit vehicle, and uses electromagnetic controller driving will not be by these conditions
Limitation can any time use after vehicle startup；
3, engine braking enters into and exits from the time and is obviously shortened：Traditional fluid pressure type or solid chain type engine braking due to the use of
Machine oil as working media or drive control medium, engine braking to enter into and exit from the time longer, generally require 0.2s~
0.4s, and can individually be powered strategy using single cylinder according to current camshaft location using electromagnetic controller, realize camshaft rotation
The switching for interior completion positive work and the negative work of turning around, promotes engine braking and enters into and exits from speed；
4, engine braking performance classification more refines：Conventional engine brake generally uses two solenoid valve control brake circuits
The disengaging of middle machine oil, therefore engine braking performance can be divided into two class, and every cylinder may be implemented using electromagnetic controller
Electromagnetic controller individually controls, and braking ability can be divided into six ranks for six cylinder engine in this way, can be segmented in this way
Benefit in addition to more flexible to the adaptability of braking ability（For example braking ability demand when vehicle zero load can be smaller）, for
The speed control of the vehicle and reduction of speed of engine has enormous benefits when automatic transmission gear shift when automatic cruising；
5, engine fuel consumption is reduced：Machine oil is not needed as driving medium using electromagnetic controller, engine motor oil needs
The amount of asking and lubricating oil pump supply capability can be reduced suitably, therefore contribute to the reduction of fuel consumption.
Description of the drawings
Fig. 1 is the structural schematic diagram of electromagnetic control type engine braking apparatus of the embodiment of the present invention.
The sectional view of electromagnetic control type engine braking apparatus when Fig. 2 is engine work of the embodiment of the present invention.
The sectional view of electromagnetic control type engine braking apparatus when Fig. 3 is engine braking operation of the embodiment of the present invention.
Fig. 4 is the explosive decomposition figure of auxiliary rocker arm of the embodiment of the present invention and Electromagnetic Control mechanism.
Fig. 5 is the sectional view of Electromagnetic Control of embodiment of the present invention mechanism.
Fig. 6 is the vertical view of sleeve of the embodiment of the present invention.
Fig. 7 is the sectional view of sleeve of the embodiment of the present invention.
Fig. 8 is the vertical view of push rod of the embodiment of the present invention.
Fig. 9 is the front view of push rod of the embodiment of the present invention.
Figure 10 is the vertical view of mandril of the embodiment of the present invention.
Figure 11 is the front view of mandril of the embodiment of the present invention.
In figure, 1- rocker arm shafts, 2- camshafts, the first cams of 21-, the second cams of 22-, 3- exhaust rocker arms, the rollings of 31- first
Wheel, 32- adjustment bolts, 33- image angles, 34- locking nuts, 4- auxiliary rocker arms, 41- threaded holes, 42- protrusions, 43- lubricant passage ways,
The second idler wheels of 44-, 5- air valve bridges, 6- elastic components, 7- sliding pins, 8- electromagnetic drive mechanisms, 81- push rods, the first bar shaped boss of 811-,
812- broached-tooth designs, 82- mandrils, the second bar shaped boss of 821-, the second ramp structures of 822-, 83- sleeves, 831- the first sliding grooves,
832- second sliding slots, 833- positioning convex platforms, the first ramp structures of 834-, 835- card slots, 84- springs, 85- spring bases, 86- cards
Spring, 87- fastening nuts, 9- electromagnetic controllers, 10-, 11- first row valves, 12- second row valves.
Specific implementation mode
Inventive embodiments of the present invention are described further below in conjunction with the accompanying drawings.
In the description that the present invention invents, it should be noted that the orientation or position of the instructions such as term "front", "rear", "upper", "lower"
The relationship of setting be for ease of description the present invention invention and simplify description and define, do not indicate or imply the indicated device or
Element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit invented the present invention
System.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply relative importance.
As shown, a kind of electromagnetic control type engine braking apparatus, including first row valve 11, second row valve 12,
Rocker arm shaft 1, camshaft 2, exhaust rocker arm 3, auxiliary rocker arm 4, air valve bridge 5, elastic component 6, sliding pin 7, electromagnetic drive mechanism 8.
The first row valve 11, second row valve 12 use mushroom valve, for control engine inner combustion chamber and into
The flowing of gas between discharge manifold.
The camshaft 2 is arranged in parallel with rocker arm shaft 1, and the camshaft 2 is equipped with 21 He of the first cam being adjacently positioned
Second cam 22；The exhaust rocker arm 3 is adjoining with auxiliary rocker arm 4 and is rotatably installed on rocker arm shaft 1, and the exhaust is shaken
The rear end of arm 3 is corresponding with the first cam 21, and the rear end of the auxiliary rocker arm 4 is corresponding with the second cam 22.
The air valve bridge 5 is horizontally set on first row valve 11 and second row valve 12, and is fixed and connected with 3 front end of exhaust rocker arm
It connects, exhaust rocker arm 3 can be pressed onto and be contacted with the first cam 21, therefore when the rotation of camshaft 2, the first cam 21 can drive exhaust
Rocking arm 3 is along 1 rotary oscillation of rocker arm shaft, to drive first row valve 11 and second row valve 12 simultaneously by air valve bridge 5
Realize exhaust stroke.
Wherein it is possible to install one first idler wheel 31, first rolling by the first roller shaft in 3 rear end of the exhaust rocker arm
Wheel 31 is contacted with the first cam 21, is formed between the first cam 21 and the first idler wheel 31 and is rolled cooperation, it is convex to greatly reduce first
Frictional force between wheel 21 and exhaust rocker arm 3 reduces abrasion, improves service life.
It is connected in addition, can be realized by adjusting bolt 32 and image angle 33 between the air valve bridge 5 and exhaust rocker arm 3, institute
It states adjustment bolt 32 and is mounted on 3 front end of exhaust rocker arm, image angle 33 is fitted in the lower end of adjustment bolt 32 by specific purpose tool, and as
Angle 33 can be freely rotated in certain corner.
Further, 32 upper end of the adjustment bolt is protruded from the top of 3 front end of exhaust rocker arm, and passes through locking nut 34
It is locked, connection is more securely, reliably.
The elastic component 6 is contacted for being pressed onto auxiliary rocker arm 4 with the second cam 22, therefore when the rotation of camshaft 2, and second
Cam 22 can drive auxiliary rocker arm 4 along 1 rotary oscillation of rocker arm shaft.
Likewise, the second idler wheel 44, second rolling can be installed by the second roller shaft in 4 rear end of the auxiliary rocker arm
Wheel 44 is contacted with the second cam 22, is formed between the second cam 22 and the second idler wheel 44 and is rolled cooperation, it is convex to greatly reduce second
Frictional force between wheel 22 and auxiliary rocker arm 4 reduces abrasion, improves service life.
In addition, elastic component 6 also has many selectable modes, can be equipped with to side in 4 rear end of the auxiliary rocker arm
One cylindrical protrusion 42；The elastic component 6 is selected as leaf spring, one end is fixed by rocker arm shaft 1, and the other end is pressed in
In protrusion 42, auxiliary rocker arm 4 is made to be contacted with the second cam 22 always.It is of course also possible to use the other forms such as spring, torsional spring.
The sliding pin 7 is arranged in air valve bridge 5, and 7 one end of the sliding pin is contacted with first row valve 11, and the other end is pierced by gas
The raft of pontoons 5；The setting of the electromagnetic drive mechanism 8 is corresponding with sliding pin 7 in 4 front end of auxiliary rocker arm, and the electromagnetic drive mechanism 8 is at least
Including a mandril that can be moved up and down 82, and by 9 control action of electromagnetic controller, the mandril 82 has to be kept with sliding pin 7
The first position of certain interval and the second position being kept in contact with sliding pin 7.
When engine work, mandril 82 is in first position under the control of electromagnetic controller 9, is protected with sliding pin 7
Certain interval is held, is not worked to first row valve 11.
When electromagnetic control type engine braking apparatus works, mandril 82 is in second under the control of electromagnetic controller 9
Position is contacted with sliding pin 7, and the action of auxiliary rocker arm 4 can then open first row valve 11, realize engine braking or internal EGR.
When electromagnetic control type engine braking apparatus does not work, mandril 82 returns under the control of electromagnetic controller 9
One position keeps certain interval with sliding pin 7, does not work to first row valve 11.
Drive control is realized using electromagnetic controller 9, substitutes and is adopted in existing conventional hydraulic formula or solid chain type engine braking
Use machine oil as working media or drive control medium, when eliminating engine start, since engine oil viscosity is high, engine oil pressure draws greatly
The braking function risen, which opens by mistake, to be opened and the unstable idle speed that brings and emits white cigarette problem, more securely and reliably, and not by oil temperature
And the conditions such as engine oil pressure require limitation, can any time be used after vehicle startup, using area range is wider, starts mechanism
It is dynamic to enter into and exit from the time and be also obviously shortened, moreover it is possible to reduce engine fuel consumption.
Wherein, second cam 22 includes basic circle 221 and one or two peaches 222.Such as two peach packets
A braking peach is included, an EGR peach or a BGR peaches driving auxiliary rocker arm 4 realize auxiliary valve motion, brake peach
Son provides a braking lift, and optional EGR peaches can provide an EGR lift, optional BGR peaches when engine makees positive work
Son can provide a BGR lift in engine braking.
As shown, the Electromagnetic Control mechanism 8 further includes push rod 81, sleeve 83, spring 84, spring base 85.
The sleeve 83 is fixedly mounted on the front end of auxiliary rocker arm 4, and inner wall is equipped with 4 groups of circumferentially uniformly distributed the first sliding grooves
831 and 4 groups of circumferentially uniformly distributed second sliding slots 832, the first sliding groove 831 are spaced apart with second sliding slot 832, are slided first
The structure of positioning convex platform 833 is formed between slot 831 and second sliding slot 832, the first inclined-plane knot is formed on 833 bottom of the positioning convex platform
Structure 834, wherein a diameter of A of the first sliding groove 831, is B between second sliding slot 832, and A ＞ B.
Certainly, the first sliding groove 831 and the quantity of second sliding slot 832 are not limited to 4 groups, can also be 3 groups or 5 groups
Differ.
In addition, 4 front end of the auxiliary rocker arm is equipped with threaded hole 41, the sleeve 83 is externally formed with external thread structure, institute
It states sleeve 83 to be fixedly installed in threaded hole 41 by screw-thread fit, by screw-thread fit, very convenient, Er Qiean is not only installed
Dress is secured.
Further, 83 top of the sleeve is protruded from the top of threaded hole 41, is realized further by fastening nut 87
Fixed locking, connection more securely, it is reliable.
The push rod 81 is mounted in sleeve 83, and 81 external circumferential of the push rod is uniformly arranged 8 the first bar shaped boss
811, first bar shaped boss 811 is respectively embedded into the first sliding groove 831 and second sliding slot 832, can be along the first sliding groove 831 and the
Two sliding slots 832 move up and down, and 81 lower face of the push rod is formed with circumferentially uniformly distributed broached-tooth design 812.
Certainly, the quantity of first bar shaped boss 811 is also not limited to 8, and quantity is the first sliding groove 831 and second
The summation of sliding slot 832.
The mandril 82 is mounted in sleeve 83 and is located at 81 lower end of push rod, and 82 external circumferential of the mandril is uniformly arranged 4
A second bar shaped boss 821, a diameter of C of second bar shaped boss 821, and A ＞ C ＞ B, second bar shaped boss 821
It in energy insertion the first sliding groove 831, and cannot be embedded in the second sliding slot 832, second bar shaped boss, 821 top is formed
Second ramp structure 822, second ramp structure 822 can be matched with broached-tooth design 812, the first ramp structure 834.
Likewise, the quantity of second bar shaped boss 821 is also not limited to 4, quantity and the first sliding groove 831 and the
Two sliding slots 832 are corresponding.
The sleeve 83 is equipped with card slot 835 close to the position of bottom, and clamp spring 86, the spring are equipped in the card slot 835
Seat 85 be mounted on clamp spring 86 on, the spring 84 is set on mandril 82, and its both ends respectively with 82 phase of spring base 85 and mandril
It contradicts, mandril 82 can be driven to move up.
The electromagnetic controller 9 is mounted on 83 top of sleeve, and is in contact with 81 upper surface of push rod, 82 lower end of the mandril
It is corresponding with sliding pin 7 across spring base 85.
When engine work, electromagnetic controller 9 is closed, and the second bar shaped boss 821 of mandril 82 is just embedded in
In the first sliding groove 831, while under the action of spring 84, being maintained at highest position so that mandril 82 keeps certain with sliding pin 7
The action in gap, auxiliary rocker arm 4 will not act first row valve 11.
When electromagnetic control type engine braking apparatus works, electromagnetic controller 9 is opened, and is executed plunger downlink, is held
Row plunger can push push rod 81 to move down, and push rod 81 then can push mandril 82 to move down, until the second bar shaped boss 821 is de-
From the first sliding groove 831, at this point, being generated between the second ramp structure 822 on the broached-tooth design 812 and mandril 82 of 81 bottom of push rod
Interaction force make mandril 82 turn over certain angle, then electromagnetic controller 9 close, execute plunger move up resets, top
Bar 82 then moves up under the action of spring 84, at this point, first of the second ramp structure 822 and sleeve 83 on mandril 82 is oblique
The interaction force generated between face structure 834 makes mandril 82 turn over certain angle again and moves up slightly so that the second bar shaped
Boss 821 is corresponding with second sliding slot 832, since the second bar shaped boss 821 can not be embedded in second sliding slot 832 so that mandril
82 can not continue to move up, to be maintained at lower position so that mandril 82 with reach lock position, 82 lower end of mandril can be with
Sliding pin 7 contacts, and the action of auxiliary rocker arm 4 can then open first row valve 11, realize engine braking or internal EGR.
When electromagnetic control type engine braking apparatus does not work, electromagnetic controller 9 is opened, and executes plunger downlink,
Executing plunger can push push rod 81 to move down, and push rod 81 then can push mandril 82 to move down, the second inclined-plane on mandril 82
Structure 822 is detached with the first ramp structure 834 of sleeve 83, while on the broached-tooth design 812 of 81 bottom of push rod and mandril 82
The interaction force generated between second ramp structure 822 makes mandril 82 be again rotated through certain angle, then electromagnetic controller 9
It closes, executes plunger and move up reset, mandril 82 then moves up under the action of spring 84, at this point, second on mandril 82
The interaction force generated between ramp structure 822 and the first ramp structure 834 of sleeve 83 makes mandril 82 turn over again centainly
Angle so that the second bar shaped boss 821 is corresponding with the first sliding groove 831, then continue to move up under the action of spring 84, the
Two bar shaped boss 821 are embedded in the first sliding groove 831, are maintained at highest position so that and mandril 82 keeps certain interval with sliding pin 7,
The action of auxiliary rocker arm 4 will not act first row valve 11.
By an electromagnetic controller 9, individually one Electromagnetic Control mechanism 8 of control driving works, in this way for six cylinder engine
Braking ability can be divided into six ranks, the benefit that can be segmented in this way is in addition to more flexible to the adaptability of braking ability
（For example braking ability demand when vehicle zero load can be smaller）, the speed control and fluid drive of vehicle when for automatic cruising
The reduction of speed of engine has enormous benefits when case is shifted gears.
Meanwhile Electromagnetic Control mechanism 8 passes through the structures such as push rod 81, mandril 82, sleeve 83, spring 84, spring base 85 so that
Mandril 82 itself has the lockup state being kept in contact with sliding pin 7 and keeps the not lockup state of spacing with sliding pin 7, therefore,
The power that one 82 location status of switching mandril need to be only provided after unlatching electromagnetic controller 9 every time, when the position of mandril 82
After state completes switching, electromagnetic controller 9 can be closed and be resetted, and not only worked and more stablized, but also protect electromagnetic controller
9, service life is provided.
Certainly, Electromagnetic Control mechanism 8 also can directly be protected by the driving force of electromagnetic controller 9 only with the form of mandril
It holds and the contact of sliding pin 7 or detaches.
In addition, as Figure 2-3, oil circuit 10 is equipped in the rocker arm shaft 1, oil can be connected to by being equipped in the auxiliary rocker arm 4
The lubricant passage way 43 on road 10, the lubricant passage way 43 lead to threaded hole 42, and machine oil shakes by the oil circuit 10 and auxiliary of rocker arm shaft 1
The lubricant passage way 43 of arm 4 enters in Electromagnetic Control mechanism 8, and lubricating oil is provided for each parts in Electromagnetic Control mechanism 8.
Embodiment is not construed as the limitation to invention, but any spiritual improvements introduced based on the present invention, all Ying Ben
Within the protection domain of invention.
Claims (15)
1. a kind of electromagnetic control type engine braking apparatus, including first row valve（11）, second row valve（12）, feature exists
In：Further include
Rocker arm shaft（1）；
Camshaft（2）, with rocker arm shaft（1）It is parallel, and with the first cam being adjacently positioned（21）With the second cam（22）；
Exhaust rocker arm（3）, it is rotatably installed on rocker arm shaft, its rear end and the first cam（21）It is corresponding；
Auxiliary rocker arm（4）, it is rotatably installed on rocker arm shaft, and adjoining with exhaust rocker arm, its rear end and the second cam
（22）It is corresponding；
Air valve bridge（5）, it is horizontally set in first row valve（11）With second row valve（12）On, and and exhaust rocker arm（3）Front end is fixed
Connection, can be by exhaust rocker arm（3）It is pressed onto and the first cam（21）Contact；
Elastic component（6）, can be by auxiliary rocker arm（4）It is pressed onto and the second cam（22）Contact；
Sliding pin（7）, it is arranged in air valve bridge（5）It is interior, the sliding pin（7）One end and first row valve（11）Contact, the other end are pierced by
Air valve bridge（5）；
Electromagnetic drive mechanism（8）, it is arranged in auxiliary rocker arm（4）Front end and sliding pin（7）It is corresponding, the electromagnetic drive mechanism（8）
The mandril that can be moved up and down including at least one（82）, and by electromagnetic controller（9）Control action, the mandril（82）With with
Sliding pin（7）Keep first position and and the sliding pin of certain interval（7）The second position being kept in contact.
2. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The Electromagnetic Control mechanism
（8）It further include push rod（81）, sleeve（83）, spring（84）, spring base（85）；
The sleeve（83）It is fixedly mounted on auxiliary rocker arm（4）Front end, inner wall are equipped with the circumferentially uniformly distributed the first sliding groove of N groups
（831）And the second sliding slot that N groups are circumferentially uniformly distributed（832）, the first sliding groove（831）With second sliding slot（832）It is spaced apart,
Make the first sliding groove（831）With second sliding slot（832）Between form positioning convex platform（833）, the positioning convex platform（833）Bottom
Portion forms the first ramp structure（834）, wherein the first sliding groove（831）A diameter of A, second sliding slot（832）Between be
B, and A ＞ B, N >=3；
The push rod（81）Mounted on sleeve（83）It is interior, the push rod（81）External circumferential is uniformly arranged 2N the first bar shaped boss
（811）, first bar shaped boss（811）It is respectively embedded into the first sliding groove（831）With second sliding slot（832）It is interior, it can be slided along first
Slot（831）With second sliding slot（832）It moves up and down, the push rod（81）Lower face is formed with circumferentially uniformly distributed broached-tooth design
（812）；
The mandril（82）Mounted on sleeve（83）It is interior and be located at push rod（81）Lower end, the mandril（82）External circumferential is uniformly set
Set N number of second bar shaped boss（821）, second bar shaped boss（821）A diameter of C, and A ＞ C ＞ B, second bar shaped
Boss（821）It can embedded the first sliding groove（831）It is interior, second bar shaped boss（821）Second ramp structure is formed on top
（822）；
The spring base（85）It is fixed on sleeve（83）Bottom, the spring（84）It is set in mandril（82）On, and its both ends point
Not and spring base（85）And mandril（82）It is inconsistent；
The electromagnetic controller（9）Mounted on sleeve（83）Top, and and push rod（81）Upper surface is in contact, the mandril（82）
Lower end passes through spring base（85）With sliding pin（7）It is corresponding.
3. electromagnetic control type engine braking apparatus according to claim 2, it is characterised in that：The first sliding groove
（831）With second sliding slot（832）4 groups are equipped with, first bar shaped boss（811）Equipped with 8, second bar shaped boss
（821）Equipped with 4.
4. electromagnetic control type engine braking apparatus according to claim 2, it is characterised in that：The sleeve（83）It is close
The position of bottom is equipped with card slot（835）, the card slot（835）It is interior to be equipped with clamp spring（86）, the spring base（85）Mounted on clamp spring
（86）On.
5. electromagnetic control type engine braking apparatus according to claim 2, it is characterised in that：The auxiliary rocker arm（4）
Front end is equipped with threaded hole（41）, the sleeve（83）It is externally formed with external thread structure, the sleeve（83）Pass through screw-thread fit
It is fixedly installed in threaded hole（41）It is interior.
6. electromagnetic control type engine braking apparatus according to claim 5, it is characterised in that：The sleeve（83）Top
From threaded hole（41）Top protrusion, pass through fastening nut（87）Fixed locking.
7. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：Second cam（22）
Including basic circle（221）And one or more peach（222）.
8. electromagnetic control type engine braking apparatus according to claim 7, it is characterised in that：The peach（222）Packet
Include a braking peach and an EGR peach or BGR peaches.
9. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The auxiliary rocker arm（4）
Rear end to side set there are one protrusion（42）；The elastic component（6）Using leaf spring, one end is fixed by rocker arm shaft（1）On, separately
One end is pressed in protrusion（42）On, make auxiliary rocker arm（4）Always with the second cam（22）Contact.
10. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The protrusion（42）It is in
It is cylindrical.
11. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The rocker arm shaft（1）It is interior
Equipped with oil circuit（10）, the auxiliary rocker arm（4）Interior be equipped with can be connected to oil circuit（10）Lubricant passage way（43）, the lubricant passage way
（43）Lead to electromagnetic drive mechanism（8）.
12. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The exhaust rocker arm（3）
Rear end is equipped with the first idler wheel（31）, first idler wheel（31）With the first cam（21）Contact.
13. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The auxiliary rocker arm（4）
Rear end is equipped with the second idler wheel（44）, second idler wheel（44）With the second cam（22）Contact.
14. electromagnetic control type engine braking apparatus according to claim 1, it is characterised in that：The exhaust rocker arm（3）
Front end is fixedly connected with adjustment bolt（32）, the adjustment bolt（32）Lower end passes through image angle（33）With air valve bridge（5）Connection.
15. electromagnetic control type engine braking apparatus according to claim 14, it is characterised in that：The adjustment bolt
（32）Upper end is from exhaust rocker arm（3）The top of front end protrudes, and passes through locking nut（34）It is locked.
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|---|---|---|---|
| CN201810749212.8A CN108661745B (en) | 2018-07-10 | 2018-07-10 | Electromagnetic control type engine braking device |
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| CN108661745B CN108661745B (en) | 2023-11-21 |
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| CN109139172A (en) * | 2018-11-09 | 2019-01-04 | 广西玉柴机器股份有限公司 | The auxiliary brake mechanism of medium and heavy engine |
| CN109372608A (en) * | 2018-11-27 | 2019-02-22 | 浙江黎明发动机零部件有限公司 | A kind of electromagnetic control type engine braking apparatus |
| CN109854325A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | A kind of two-stroke auxiliary brake mechanism |
| CN110344909A (en) * | 2019-08-16 | 2019-10-18 | 浙江黎明智造股份有限公司 | A kind of electrodynamic type engine braking apparatus |
| CN110374713A (en) * | 2019-08-16 | 2019-10-25 | 浙江黎明智造股份有限公司 | A kind of engine braking apparatus |
| CN110425015A (en) * | 2019-09-10 | 2019-11-08 | 浙江黎明智造股份有限公司 | A kind of hydraulically-controlled type engine braking apparatus |
| CN110529216A (en) * | 2019-06-27 | 2019-12-03 | 浙江黎明智造股份有限公司 | A kind of electric-controlled type engine braking apparatus |
| CN110566304A (en) * | 2018-11-30 | 2019-12-13 | 长城汽车股份有限公司 | Valve train and control strategy for an engine having a low pressure EGR system |
| US10876438B1 (en) | 2019-08-29 | 2020-12-29 | Zhejiang Liming Intelligent Manufacturing Co., Ltd. | Braking device for electric engine |
| CN113530633A (en) * | 2021-09-15 | 2021-10-22 | 宁波东方动力部件有限公司 | Internal combustion engine cylinder braking device with three rocker arm structure |
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| CN110344909A (en) * | 2019-08-16 | 2019-10-18 | 浙江黎明智造股份有限公司 | A kind of electrodynamic type engine braking apparatus |
| CN110374713B (en) * | 2019-08-16 | 2024-04-19 | 浙江黎明智造股份有限公司 | Engine braking device |
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| US10876438B1 (en) | 2019-08-29 | 2020-12-29 | Zhejiang Liming Intelligent Manufacturing Co., Ltd. | Braking device for electric engine |
| CN110425015B (en) * | 2019-09-10 | 2024-02-27 | 浙江黎明智造股份有限公司 | Hydraulic control type engine braking device |
| CN110425015A (en) * | 2019-09-10 | 2019-11-08 | 浙江黎明智造股份有限公司 | A kind of hydraulically-controlled type engine braking apparatus |
| CN113530633A (en) * | 2021-09-15 | 2021-10-22 | 宁波东方动力部件有限公司 | Internal combustion engine cylinder braking device with three rocker arm structure |
| CN113530633B (en) * | 2021-09-15 | 2021-12-28 | 宁波东方动力部件有限公司 | Internal combustion engine cylinder braking device with three rocker arm structure |
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