CN214091998U - Modularized engine braking device - Google Patents
Modularized engine braking device Download PDFInfo
- Publication number
- CN214091998U CN214091998U CN202023283652.0U CN202023283652U CN214091998U CN 214091998 U CN214091998 U CN 214091998U CN 202023283652 U CN202023283652 U CN 202023283652U CN 214091998 U CN214091998 U CN 214091998U
- Authority
- CN
- China
- Prior art keywords
- spring
- mounting groove
- oil
- valve
- rocker arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Valve Device For Special Equipments (AREA)
Abstract
A modular engine braking device. The method is characterized in that: the actuating mechanism comprises a shell, a check valve group, a control valve group and an actuating assembly, wherein the check valve group, the control valve group and the actuating assembly are arranged in the shell, and the actuating mechanism is arranged in a longitudinal hole of the auxiliary rocker arm. The advantages are that: the actuating mechanism adopts an integral modular design, so that the structure is simple and stable, the space is compact, the implementation is easy, the number of components is small, the processing and assembling processes are simpler, the processing production efficiency can be greatly improved, the production cost is reduced, and the engine rocker arm is suitable for different engine rocker arms.
Description
Technical Field
The utility model relates to a well heavy diesel oil and natural gas engine, concretely relates to modularization engine braking device.
Background
The engine braking technology is that when the automobile runs, a driver lifts an accelerator pedal, releases a clutch, and utilizes compression resistance generated in the compression stroke of an engine, air intake and exhaust resistance and friction force to form braking force action on a driving wheel so as to brake the automobile. The engine braking technology is divided into three types, namely compression engine braking, air-bleed engine braking and partial air-bleed engine braking. The compression engine braking is to open an exhaust valve or an auxiliary valve near a compression top dead center; bleeder engine braking is opening the exhaust valve throughout the engine cycle; partial bleeder engine braking opens the exhaust valve for most of the engine cycle. The application of the engine braking technology effectively reduces the use frequency of a service brake, and when the whole vehicle runs down steep roads such as long slopes and rugged mountain roads, the engine is used for braking, so that the situation that the temperature of a friction plate of the brake is increased due to long-time use of the brake, the braking force is reduced, and even the brake loses effect can be avoided.
The engine braking device is capable of providing one or more auxiliary valve lifts for performing an engine braking function. At present, a plurality of invention patents relate to the application of the technology, the main technology is to include one or more additional auxiliary lifts besides the main lift of the cam, and a cam specially used for braking can be added, and according to the requirement of the work of an engine, an engine braking device enables the auxiliary lifts to be activated (to realize the engine braking function) or not to be operated.
The invention patents of the applicant like the prior application disclose an engine brake device (CN 110425016 a) and a hydraulic control type engine brake device (CN 110425015 a), which realize the cooperation with the exhaust valve by forming an actuating chamber and a control chamber on the auxiliary rocker arm, installing a control mechanism and an actuating mechanism in the actuating chamber and the control chamber, and controlling an oil path system through a solenoid valve to adjust the position states of the control mechanism and the actuating mechanism; however, the control mechanism and the actuating mechanism of the engine braking device need to be assembled on the auxiliary rocker arm one by one according to the assembling process, so that the requirement on the machining precision of the actuating cavity and the control cavity on the auxiliary rocker arm is high, the machining difficulty is high, the assembling process is complex, and the production takt is slow.
In order to overcome the defects, the applicant also applies for an invention patent of a modular engine hydraulic braking device (CN 111852606A), which forms an independent integral module for a control mechanism and an execution mechanism respectively, so as to form a modular design, and has the advantages of easy processing, simple assembly process, greatly improved processing production efficiency and reduced production cost.
Although the structure of the modularized engine hydraulic braking device is optimized to a certain extent, the structure is still complex, related components are more, the cost is high, and the universality is not high.
Therefore, how to further optimize the structure, simplify the process, and reduce the cost is a direction that those skilled in the art need to continuously research and develop improvements.
Disclosure of Invention
In order to overcome the not enough of background art, the utility model provides a modularization engine braking device.
The utility model discloses the technical scheme who adopts: a modular engine braking device comprising
The exhaust valve comprises a first exhaust valve, a second exhaust valve and a valve bridge transversely arranged on the first exhaust valve and the second exhaust valve;
the sliding pin is arranged in the valve bridge, one end of the sliding pin is contacted with the first exhaust valve, and the other end of the sliding pin penetrates out of the valve bridge;
a rocker shaft having a brake oil passage through which engine oil flows;
a camshaft disposed in parallel with the rocker shaft and having an exhaust cam and an auxiliary cam disposed adjacent to each other;
the exhaust rocker arm is rotatably arranged on the rocker shaft, the front end of the exhaust rocker arm is correspondingly contacted with the valve bridge, and the rear end of the exhaust rocker arm is correspondingly contacted with the exhaust cam;
the auxiliary rocker arm is rotatably arranged on the rocker arm shaft, is adjacent to the exhaust rocker arm, and is correspondingly contacted with the auxiliary cam at the rear end;
an elastic element capable of pressing the auxiliary rocker arm to maintain contact with the auxiliary cam;
the longitudinal hole is internally provided with a modularized actuating mechanism, and the actuating mechanism comprises
The oil-gas separator comprises a shell, a first oil inlet hole, a second oil inlet hole, a first oil outlet hole, a second oil inlet hole, a third oil outlet hole and a third oil outlet hole, wherein the upper end of the shell is provided with a first mounting groove with an open upper end, the lower end of the first mounting groove is provided with a second mounting groove with an open lower end, the upper bottom surface of the second mounting groove is provided with a third mounting groove, a channel is formed between the first mounting groove and the third mounting groove, the outer ring of the shell is provided with an annular oil groove, a plurality of oil inlet holes are formed between the annular oil groove and the channel, the shell is mounted in the longitudinal hole, and the annular oil groove corresponds to the oil hole;
the check valve group is arranged in the third mounting groove and comprises a first spring seat, a first spring and a ball body which are sequentially arranged from bottom to top, the first spring seat is fixedly mounted in the third mounting groove, an oil through groove for communicating the third mounting groove with the second mounting groove is formed in the first spring seat, one end of the first spring is connected with the first spring seat, and the other end of the first spring is connected with the ball body, so that the ball body can be driven to move upwards to seal the channel;
the control valve group is arranged in the first mounting groove and comprises a second spring seat, a second spring and a valve rod which are sequentially arranged from top to bottom, the second spring seat is fixedly mounted in the first mounting groove, one end of the second spring is connected with the second spring seat, the other end of the second spring is connected with the valve rod and can drive the valve rod to move downwards, the valve rod penetrates through the channel to be abutted against the ball body, and the elastic force of the second spring is greater than that of the first spring;
the execution assembly is arranged in the second mounting groove and comprises a third spring seat, an execution plunger and a third spring, the third spring seat is fixedly mounted at the lower end of the second mounting groove, the execution plunger is arranged in the second mounting groove, the lower end of the execution plunger penetrates through the third spring seat, and the third spring is arranged between the third spring seat and the execution plunger and can drive the execution plunger to slide upwards.
The outer wall of the upper end of the shell is provided with an external thread structure, the inner wall of the longitudinal hole is provided with an internal thread structure, and the shell is connected with the longitudinal hole in a thread fit mode.
The upper end of the shell penetrates out of the longitudinal hole and is provided with a locking nut.
The middle part of the first spring seat is provided with a groove which is sunken downwards, the middle part of the groove is provided with a spring positioning column, and the first spring is arranged in the groove and sleeved outside the spring positioning column.
The first spring seat is fixedly installed in the third installation groove in an interference fit mode.
The bottom of the channel is provided with a conical sealing surface matched with the ball.
The valve rod is in a cross shape, and the second spring is sleeved at the upper end of the valve rod.
The upper end of the execution plunger is provided with a downward sunken oil storage groove.
An annular groove is formed at the lower end of the execution plunger, and the third spring is arranged in the annular groove.
The working principle of the modular engine braking device is as follows:
when the engine works normally, the brake oil path in the rocker shaft has no oil flow, and the executing plunger and the sliding pin keep a certain brake clearance, so that the lift of the auxiliary cam does not work, the normal movement of the exhaust valve is not influenced, and the normal work of the engine is ensured.
When the modularized engine braking device works, an electronic control unit of an engine sends an instruction, a solenoid valve is opened, so that engine oil can flow into a braking oil circuit of a rocker shaft, the engine oil in the braking oil circuit enters a longitudinal hole through an oil hole and then enters a channel through an annular oil groove and an oil inlet hole, one part of the engine oil in the channel enters a first mounting cavity and pushes a valve rod to move so as to separate the valve rod from a sphere, the other part of the engine oil enters a third mounting cavity and enters a second mounting cavity through the oil groove, the engine oil in the second mounting cavity pushes an execution plunger to move downwards, so that a braking gap between the execution plunger and a sliding pin is eliminated, the execution plunger and the sliding pin are abutted against each other near an upper dead point of a compression stroke of the engine under the driving of an auxiliary cam, a reaction force is mutually applied to the execution plunger and the sliding pin, and high-pressure oil is formed in the second mounting cavity and the third mounting cavity at the moment, the ball body is pushed to seal the channel under the action of high-pressure oil, so that engine oil cannot flow out to form a closed oil path, the execution plunger cannot move upwards, and the sliding pin can be pressed down to open the exhaust valve, so that the engine brake is realized.
When the modularized engine braking device does not work, the electronic control unit of the engine sends out an instruction, the electromagnetic valve is closed, the oil pressure in the braking oil path of the rocker shaft is reduced or the oil is discharged from the electromagnetic valve, the valve rod is reset under the action of the second spring and pushes the ball to move to open the channel, so that the oil in the second mounting cavity and the third mounting cavity is discharged, the execution plunger is also reset under the action of the third spring and keeps a certain braking gap with the sliding pin, therefore, the lift range of the auxiliary cam does not work, the normal movement of the exhaust valve is not influenced, and the normal work of the engine is ensured.
The utility model has the advantages that: the integral modular design of the actuating mechanism ensures that the structure is simple and stable, the space is compact, the implementation is easy, the number of components is small, the processing and assembling processes are simpler, the processing production efficiency can be greatly improved, the production cost is reduced, and the actuating mechanism is suitable for different engine rocker arms.
Drawings
Fig. 1 is a schematic structural diagram of a modular engine braking device according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a modular engine braking device according to an embodiment of the present invention.
Fig. 3 is a sectional view of the auxiliary rocker arm and the actuator in normal operation of the engine according to the embodiment of the present invention.
Fig. 4 is a cross-sectional view of the auxiliary rocker arm and the actuator in the braking of the engine according to the embodiment of the present invention.
Fig. 5 is a sectional view of an auxiliary rocker arm according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view of an actuator according to an embodiment of the present invention.
Fig. 7 is a sectional view of a housing according to an embodiment of the present invention.
Fig. 8 is a sectional view of a first spring seat according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a valve rod according to an embodiment of the present invention.
Fig. 10 is a cross-sectional view of an actuator plunger according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
as shown in the figure, the modular engine brake device comprises an exhaust valve 1, a sliding pin 2, a rocker shaft 3, a camshaft 4, an exhaust rocker arm 5, an auxiliary rocker arm 6, an elastic element 7 and an actuating mechanism 8.
The exhaust valve 1 comprises a first exhaust valve 11, a second exhaust valve 12 and a valve bridge 13 transversely arranged on the first exhaust valve 11 and the second exhaust valve 12, and the first exhaust valve 11 and the second exhaust valve 12 both adopt mushroom-shaped valves and are used for controlling the flow of gas between a combustion chamber and an intake and exhaust manifold in the engine.
The sliding pin 2 is arranged in the valve bridge 13, one end of the sliding pin is in contact with the first exhaust valve 11, and the other end of the sliding pin penetrates through the valve bridge 13, and when the sliding pin 2 is subjected to a large enough acting force, the sliding pin pushes the first exhaust valve 11 to act, so that the exhaust stroke of the first exhaust valve 11 is realized.
The rocker arm shaft 3 is arranged in parallel with the camshaft 4, the camshaft 4 is provided with an exhaust cam 41 and an auxiliary cam 42 which are adjacently arranged, and the camshaft 4 can rotate to drive the exhaust cam 41 and the auxiliary cam 42 to rotate simultaneously.
The exhaust rocker arm 5 is rotatably mounted on the rocker shaft 3, the front end of the exhaust rocker arm 5 is in contact with the valve bridge 13, and the rear end of the exhaust rocker arm 5 is in contact with the exhaust cam 41, so that the exhaust rocker arm 5 can rotate and swing around the rocker shaft 3 under the combined action of the exhaust cam 41 and the exhaust valve 1 along with the rotation of the camshaft 4, and the exhaust stroke of the exhaust valve 1 can be realized through the exhaust cam 41 and the exhaust rocker arm 5.
The rear end of the exhaust rocker arm 5 is provided with a first roller 51 through a first roller shaft, the first roller 51 is in contact with the exhaust cam 41, and the exhaust cam 41 and the first roller 51 form rolling fit, so that the friction force between the exhaust cam 41 and the exhaust rocker arm 5 is greatly reduced, the abrasion is reduced, and the service life is prolonged.
The front end of the exhaust rocker arm 5 is further provided with an adjusting bolt 53, a elephant corner 52 and a fastening nut 54, the elephant corner 52 is pressed at the lower end of the adjusting bolt 53 through a special tool, the elephant corner 52 can freely rotate in a certain rotating angle, the upper end of the adjusting bolt 53 protrudes out of the top of the front end of the exhaust rocker arm 5 and is locked and fixed through the fastening nut 54, connection is firmer and more reliable, the elephant corner 52 is in contact with the valve bridge 13, and due to the fact that the degree of freedom of the elephant corner 52 is higher, the contact effect with the valve bridge 13 is guaranteed along with the swinging action of the exhaust rocker arm 5, and working stability is guaranteed.
The auxiliary rocker arm 6 is rotatably mounted on the rocker shaft 3 and is arranged adjacent to the exhaust rocker arm 5, the rear end of the auxiliary rocker arm corresponds to the auxiliary cam 42, and the auxiliary cam 42 is pressed by the elastic element 7 to contact with the auxiliary cam 42, so that when the camshaft 4 rotates, the auxiliary cam 42 can drive the auxiliary rocker arm 6 to rotate and swing along the rocker shaft 3.
Similarly, a second roller 63 can be mounted at the rear end of the auxiliary rocker arm 6 through a second roller shaft, the second roller 63 contacts the auxiliary cam 42, and the auxiliary cam 42 and the second roller 63 form rolling fit, so that the friction between the auxiliary cam 42 and the auxiliary rocker arm 6 is greatly reduced, the abrasion is reduced, and the service life is prolonged.
The auxiliary cam 42 includes a base circle and one or two peaches, for example, two peaches are provided in the present embodiment, and each peaches includes a brake peach for providing a brake lift and an EGR peach or a BGR peach, the optional EGR peach may provide an EGR lift when the engine is doing positive power, and the optional BGR peach may provide a BGR lift when the engine is braking.
In addition, there are many alternative ways for the elastic element 7, in this embodiment, the elastic element 7 is a spring, one end of which is fixed on the rear end of the auxiliary rocker arm 6, and the other end of which is fixed on a spring holder (not shown in the figure) fixed on the engine cylinder head or other fixed parts, and the elastic element 7 has enough spring force to make the engine auxiliary rocker arm 6 always contact with the auxiliary cam 42 during the operation of the engine.
Of course, the auxiliary rocker arm 6 may be held in contact with the auxiliary cam 42 during engine operation by other means, such as a leaf spring, torsion spring, or the like.
The rocker shaft 3 has a brake oil path 31 for oil to flow through, the brake oil path 31 is provided with an electromagnetic valve (not shown in the figure), the electromagnetic valve is controlled by an electronic control unit of the engine, when the electronic control unit receives a brake signal, the electromagnetic valve is controlled to be opened, the oil can enter the brake oil path 31 through the electromagnetic valve, and when the electronic control unit receives a signal for stopping braking, the electromagnetic valve is controlled to be closed, and the oil cannot enter the brake oil path 31.
The auxiliary rocker arm 6 is provided with a longitudinal hole 61 and an oil hole 62 for communicating the brake oil path 31 with the longitudinal hole 61, the longitudinal hole 61 is positioned at the front end of the auxiliary rocker arm 6, and the lower end opening of the longitudinal hole corresponds to the sliding pin 2.
The actuator 8 includes a housing 81, a check valve block 82, a control valve block 83, and an actuator assembly 84.
Check valve group 82 sets up in third mounting groove 813, include first spring holder 821, first spring 822, spheroid 823 that sets gradually from supreme down, first spring holder 821 passes through interference fit fixed mounting in third mounting groove 813, just be formed with the logical oil groove 8211 that switches on third mounting groove 813 and second mounting groove 812 on first spring holder 821, first spring holder 821 is connected to first spring 822 one end, and spheroid 823 is connected to the other end, can order about spheroid 823 rebound sealing channel 814.
Wherein, first spring holder 821 middle part is formed with undercut recess 8212, the middle part of recess 8212 is formed with spring reference column 8213, first spring 822 sets up in recess 8212 to the cover is established outside spring reference column 8213, and not only structural layout is compacter, and first spring 822 and spheroid 823 structure action are reliable moreover.
The bottom of the channel 814 is formed with a ball-fitting conical sealing surface 8141 to ensure a reliable seal with the ball 823.
The control valve group 83 is arranged in the first mounting groove 811, and comprises a second spring seat 831, a second spring 832 and a valve rod 833 which are sequentially arranged from top to bottom, wherein the second spring seat 831 is fixedly arranged in the first mounting groove 811, one end of the second spring 832 is connected with the second spring seat 831, the other end of the second spring 832 is connected with the valve rod 833, the valve rod can be driven to move downwards, the valve rod 833 is in a cross-shaped structure, the lower end of the valve rod 833 penetrates through a channel 814 to be abutted to a ball 823, the second spring 832 is sleeved at the upper end of the valve rod 833, the elastic force of the second spring 832 is greater than that of the first spring 822, and the second spring 83 can push the ball 823 and can keep the ball 823 and a conical sealing surface 8141 in an open state.
The actuating assembly 84 is disposed in the second mounting groove 812 and includes a third spring seat 841, an actuating plunger 842, and a third spring 843, the third spring seat 841 is fixedly mounted at the lower end of the second mounting groove 812, the actuating plunger 842 is disposed in the second mounting groove 812, the lower end of the actuating plunger 842 penetrates the third spring seat 841, and the third spring 843 is disposed between the third spring seat 841 and the actuating plunger 842 and can drive the actuating plunger 842 to slide upwards.
Wherein, execution plunger 842 upper end is formed with the oil storage tank 8421 of undercut, just the oil storage tank 8421 is greater than first spring holder 821 for in first spring holder 821 can imbed the oil storage tank 8421, not only make the structure of execution plunger 842 more stable, when guaranteeing moreover that when the engine oil enters into second mounting groove 812, have sufficient oil storage space in the second mounting groove 812 and keep the high-pressure state.
An annular groove 8422 is formed at the lower end of the execution plunger 842, and the third spring 843 is arranged in the annular groove 8422, so that the structure is stable, and the action is reliable.
In the process of processing and assembling the modular engine braking device, the actuating mechanism 8 can be assembled into a whole module firstly, and then the whole module is installed in the longitudinal hole 61 of the auxiliary rocker arm 6, and the assembly of the actuating mechanism 8 only needs to sequentially install the check valve group 82, the control valve group 83 and the actuating component 84 into the third installation groove 813, the first installation groove 811 and the second installation groove 812 of the shell 81, so that the whole assembly is very convenient.
In addition, the outer wall of the upper end of the shell 81 is formed with an external thread structure, the inner wall of the longitudinal hole 61 is formed with an internal thread structure, the shell 81 is connected with the longitudinal hole 61 through thread matching, the operation of installing the actuating mechanism 8 into the longitudinal hole 61 of the auxiliary rocker arm 6 is also very simple, and the position adjustment is facilitated through the thread matching connection.
Furthermore, the upper end of the shell 81 penetrates out of the longitudinal hole 61 and is provided with a locking nut 85, and after the locking nut 85 is fixed and locked, the structure is more stable and reliable.
The working principle of the modular engine braking device is as follows:
when the engine works normally, the brake oil path 31 in the rocker shaft 3 has no oil flow, and at this time, the execution plunger 842 and the sliding pin 2 keep a certain brake clearance, so that the lift of the auxiliary cam 42 does not work, the normal movement of the exhaust valve 1 is not influenced, and the normal work of the engine is ensured.
When the modularized engine braking device works, an electronic control unit of the engine sends a command, a solenoid valve is opened, so that the engine oil can flow into a braking oil path 31 of the rocker shaft 3, the engine oil in the braking oil path 31 enters a longitudinal hole 61 through an oil hole 62, then enters a channel 814 through an annular oil groove 815 and an oil inlet 816, a part of the engine oil in the channel 814 enters a first mounting cavity 811 and pushes a valve rod 833 to move so as to be separated from a ball 823, the other part of the engine oil enters a third mounting cavity 813 and enters a second mounting cavity 812 through an oil through groove 8211, the engine oil in the second mounting cavity 812 pushes an execution plunger 842 to move downwards, so that a braking gap between the execution plunger 842 and a sliding pin 2 is eliminated, the execution plunger 842 is abutted against the sliding pin 2 near the top dead center of the compression stroke of the engine under the driving of an auxiliary cam 42, and the execution plunger 842 and the sliding pin 2 mutually receive a reaction force, at this time, high pressure oil is formed in the second mounting cavity 812 and the third mounting cavity 813, the ball 823 is pushed to seal the channel 814 under the action of the high pressure oil, so that the engine oil cannot flow out, a closed oil path is formed, the actuating plunger 842 cannot move upwards, and therefore the sliding pin 2 is pressed down, so that the exhaust valve 1 is opened, and the engine brake is realized.
When the modular engine braking device does not work, the electronic control unit of the engine sends out an instruction, the electromagnetic valve is closed, the oil pressure in the braking oil path 31 of the rocker shaft 3 is reduced or leaked out by the electromagnetic valve, the valve rod 833 is reset under the action of the second spring 832 and pushes the ball 823 to move to open a channel, so that the oil in the second mounting cavity 812 and the third mounting cavity 813 is leaked out, the execution plunger 842 is also reset under the action of the third spring 843 and keeps a certain braking gap with the sliding pin 2, therefore, the lift of the auxiliary cam 42 does not work, the normal movement of the exhaust valve 1 is not influenced, and the normal operation of the engine is ensured.
By adopting the scheme, the actuating mechanism 8 adopts the integral modular design, so that the structure is simple and stable, the space is compact, the implementation is easy, the components are few, the processing and assembling processes are simpler, the processing production efficiency can be greatly improved, the production cost is reduced, and the engine rocker arm can be suitable for different engine rocker arms.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.
Claims (9)
1. A modular engine braking device comprising
The exhaust valve (1) comprises a first exhaust valve (11), a second exhaust valve (12) and a valve bridge (13) transversely arranged on the first exhaust valve (11) and the second exhaust valve (12);
the sliding pin (2) is arranged in the valve bridge (13), one end of the sliding pin is in contact with the first exhaust valve (11), and the other end of the sliding pin penetrates out of the valve bridge (13);
a rocker shaft (3) having a brake oil passage (31) through which oil flows;
a camshaft (4) that is disposed in parallel with the rocker shaft (3) and has an exhaust cam (41) and an auxiliary cam (42) disposed adjacent to each other;
an exhaust rocker arm (5) rotatably mounted on the rocker shaft (3), the front end of which is in contact with the valve bridge (13) and the rear end of which is in contact with the exhaust cam (41);
the auxiliary rocker arm (6) is rotatably arranged on the rocker arm shaft (3), is adjacent to the exhaust rocker arm (5), and is in corresponding contact with the auxiliary cam (42) at the rear end, a longitudinal hole (61) and an oil hole (62) for communicating the brake oil path (31) with the longitudinal hole (61) are formed in the auxiliary rocker arm (6), the longitudinal hole (61) is positioned at the front end of the auxiliary rocker arm (6), and the lower end opening of the longitudinal hole corresponds to the sliding pin (2);
an elastic element (7) capable of pressing the auxiliary rocker arm (6) into contact with the auxiliary cam (42);
the method is characterized in that: a modularized actuating mechanism (8) is arranged in the longitudinal hole (61), and the actuating mechanism (8) comprises
A housing (81) having an upper end formed with a first mounting groove (811) having an upper end opened, a lower end formed with a second mounting groove (812) having a lower end opened, an upper bottom surface of the second mounting groove (812) formed with a third mounting groove (813), a passage (814) formed between the first mounting groove (811) and the third mounting groove (813), an annular oil groove (815) formed on an outer ring of the housing (81), a plurality of oil inlet holes (816) formed between the annular oil groove (815) and the passage (814), the housing (81) being mounted in the longitudinal hole (61), and the annular oil groove (815) corresponding to the oil hole (62);
the check valve group (82) is arranged in the third mounting groove (813) and comprises a first spring seat (821), a first spring (822) and a ball body (823) which are sequentially arranged from bottom to top, the first spring seat (821) is fixedly mounted in the third mounting groove (813), an oil through groove (8211) which conducts the third mounting groove (813) and the second mounting groove (812) is formed in the first spring seat (821), one end of the first spring (822) is connected with the first spring seat (821), the other end of the first spring is connected with the ball body (823), and the ball body (823) can be driven to move upwards to seal the channel (814);
the control valve group (83) is arranged in the first mounting groove (811) and comprises a second spring seat (831), a second spring (832) and a valve rod (833) which are sequentially arranged from top to bottom, the second spring seat (831) is fixedly mounted in the first mounting groove (811), one end of the second spring (832) is connected with the second spring seat (831), the other end of the second spring (832) is connected with the valve rod (833) and can drive the valve rod to move downwards, the valve rod (833) penetrates through the channel (814) to be abutted to the ball (823), and the elastic force of the second spring (832) is greater than that of the first spring (822);
and the execution assembly (84) is arranged in the second mounting groove (812), and comprises a third spring seat (841), an execution plunger (842) and a third spring (843), wherein the third spring seat (841) is fixedly mounted at the lower end of the second mounting groove (812), the execution plunger (842) is arranged in the second mounting groove (812), the lower end of the execution plunger (842) penetrates through the third spring seat (841), the third spring (843) is arranged between the third spring seat (841) and the execution plunger (842), and the execution plunger (842) can be driven to slide upwards.
2. A modular engine braking apparatus, as set forth in claim 1, wherein: the outer wall of the upper end of the shell (81) is provided with an external thread structure, the inner wall of the longitudinal hole (61) is provided with an internal thread structure, and the shell (81) is connected with the longitudinal hole (61) in a thread fit mode.
3. A modular engine braking apparatus, according to claim 2, characterized in that: the upper end of the shell (81) penetrates through the longitudinal hole (61) and is provided with a locking nut (85).
4. A modular engine braking apparatus, as set forth in claim 1, wherein: first spring holder (821) middle part is formed with undercut recess (8212), the middle part of recess (8212) is formed with spring location post (8213), first spring (822) set up in recess (8212) to the cover is established outside spring location post (8213).
5. A modular engine braking apparatus according to claim 4, characterized in that: the first spring seat (821) is fixedly installed in the third installation groove (813) through interference fit.
6. A modular engine braking apparatus, as set forth in claim 1, wherein: the bottom of the channel (814) is formed with a conical sealing surface (8141) which is adapted to the ball.
7. A modular engine braking apparatus, as set forth in claim 1, wherein: the valve rod (833) is in a cross shape, and the second spring (832) is sleeved at the upper end of the valve rod (833).
8. A modular engine braking apparatus, as set forth in claim 1, wherein: an oil storage groove (8421) which is sunken downwards is formed at the upper end of the execution plunger (842).
9. A modular engine braking apparatus, as set forth in claim 1, wherein: an annular groove (8422) is formed at the lower end of the execution plunger (842), and the third spring (843) is arranged in the annular groove (8422).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023283652.0U CN214091998U (en) | 2020-12-31 | 2020-12-31 | Modularized engine braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023283652.0U CN214091998U (en) | 2020-12-31 | 2020-12-31 | Modularized engine braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214091998U true CN214091998U (en) | 2021-08-31 |
Family
ID=77435666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023283652.0U Active CN214091998U (en) | 2020-12-31 | 2020-12-31 | Modularized engine braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214091998U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2020
- 2020-12-31 CN CN202023283652.0U patent/CN214091998U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5508520B2 (en) | Exclusive rocker arm type engine brake | |
| CN204961000U (en) | Integrated dynamic formula rocking arm stopper system of losing with automatic re -setting | |
| US20050274342A1 (en) | System and method for actuating an engine valve | |
| CN107035460B (en) | Engine brake oil way control device and application method thereof | |
| CN214091998U (en) | Modularized engine braking device | |
| US7665431B2 (en) | Drive piston assembly for a valve actuator assembly | |
| JPH06101436A (en) | Variable valve system of internal combustion engine | |
| CN214499193U (en) | Modularized engine braking device | |
| CN114109551B (en) | Special driving cam combined type valve driving device for hydraulic clearance self-adjustment | |
| US10550740B2 (en) | Multifunctional engine brake | |
| CN112483215A (en) | Modularized engine braking device | |
| CN111852606A (en) | Modular engine hydraulic braking device | |
| EP0559199B1 (en) | Valve-moving apparatus for internal combustion engine | |
| CN201666172U (en) | System for actuating engine valve | |
| CN215761845U (en) | Energy-saving and consumption-reducing engine braking device | |
| CN111828121A (en) | Internal combustion engine cylinder brake device | |
| CN212272336U (en) | Modular engine hydraulic braking device | |
| CN201461012U (en) | Single-pile cam driving high-lift-range and zero-lift-range variable gas valve bucket tappet of engine | |
| CN216741660U (en) | Frame type engine braking device | |
| CN210799065U (en) | Compression release type in-cylinder brake device for engine | |
| CN213574275U (en) | Electrically controlled engine braking device with continuously adjustable braking lift | |
| CN108708791B (en) | Cam sliding type engine braking device | |
| CN113431657A (en) | Energy-saving and consumption-reducing engine braking device | |
| CN110700917A (en) | Compression release type in-cylinder brake device for engine | |
| CN112302756A (en) | Electrically controlled engine braking device with continuously adjustable braking lift |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |