CN107035460B - Engine brake oil way control device and application method thereof - Google Patents

Engine brake oil way control device and application method thereof Download PDF

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Publication number
CN107035460B
CN107035460B CN201710261285.8A CN201710261285A CN107035460B CN 107035460 B CN107035460 B CN 107035460B CN 201710261285 A CN201710261285 A CN 201710261285A CN 107035460 B CN107035460 B CN 107035460B
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oil
brake
control
ball valve
hole
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CN107035460A (en
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张芳
万虎
吴囿霖
廖显敏
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Dongfeng Commercial Vehicle Co Ltd
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Dongfeng Commercial Vehicle Co Ltd
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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • 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
    • F01L2760/00—Control of valve gear to facilitate reversing, starting, braking of four stroke engines
    • F01L2760/003—Control of valve gear to facilitate reversing, starting, braking of four stroke engines for switching to compressor action in order to brake
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/04—Reducing noise

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The engine brake oil way control device comprises a rocker arm, a brake actuating mechanism, a control valve and an intersecting oblique/longitudinal oil way, wherein the brake actuating mechanism, the control valve and the intersecting oblique/longitudinal oil way are arranged in the control valve from top to bottom, a control piston, a control spring and a control spring seat are sequentially arranged in the control valve, a control oil discharging hole is formed in the control spring seat, a part, positioned between the control piston and the control spring seat, on the side wall of a control chamber is communicated with the side part of a brake oil cavity through the oil discharging hole, the top end of the control chamber is communicated with the bottom of the longitudinal oil way, the top of the longitudinal oil way extends to the upper side of the longitudinal oil way after passing through the oblique oil way, and the oblique oil way is communicated with the oil way in the shaft of a rocker shaft and the brake oil cavity in the brake actuating mechanism; when the hydraulic braking control device is used, the opening or closing of the oil discharging passage is realized by means of the control valve through the change of the engine oil pressure, so that the braking working condition is opened and relieved. Therefore, the invention has the advantages of better braking effect, stronger stability, better gap adjusting effect, lower production cost and capability of reducing noise in the operation of the mechanism.

Description

Engine brake oil way control device and application method thereof
Technical Field
The invention relates to an oil way control device, belongs to the technical field of vehicle engine braking, and particularly relates to an engine braking oil way control device and a use method thereof, which are particularly suitable for enhancing the control effect of a braking oil way and simplifying the structure of the engine braking oil way control device.
Background
The engine braking system is a technology of braking in a cylinder of a diesel engine, which is generally compression release type, and is formed by hydraulically driving one or two exhaust valves to open at the end of the compression stroke of the engine and utilizing compression resistance, internal friction and air intake and exhaust resistance generated in the process of reverse towing of the engine. The compression release type brake is generally realized in three modes of an external type, a special rocker arm type and an integrated rocker arm type, and a set of hydraulic component is matched with the on-off of engine oil or the pressure change of the engine oil to form a high-pressure oil cavity of a brake piston, so that the exhaust valve is directly or indirectly opened at the tail end of a compression stroke to form braking.
The invention patent application with publication number CN101526018A and publication date 2009-9 discloses a compression braking device of a four-stroke internal combustion engine, wherein one end of a rocker arm mounting like foot is provided with a control valve mechanism and a clearance compensation mechanism, wherein the control valve mechanism and the clearance compensation mechanism are arranged in parallel, and the clearance compensation amount is the lift of a brake bulge; the middle point of the two exhaust valve bridge is connected with the gap compensation mechanism with the gap compensation amount being the lift of the valve gap, the elephant foot is coaxially connected under the lower end of the previous gap compensation mechanism, the upper end of the latter gap compensation mechanism is always contacted with the lower end of the elephant foot, and the spring elasticity of the gap compensation mechanism is smaller than the braking oil pressure and larger than the dead weight of the elephant foot. Although the invention can simultaneously open two exhaust valves when the compression braking of the engine works so as to improve the braking effect of the engine, the invention still has the following defects:
Firstly, the control valve mechanism in the design only acts on the oil inlet path, but does not relate to the oil discharging path, and the continuous inflow of engine oil is forbidden in a mode of active closing during braking, but simultaneously, the oil discharging path is not limited, the oil discharging is still performed, a closed cavity is difficult to form in the previous clearance compensation mechanism, smooth realization of braking is prevented, and even if the smooth realization of the braking is realized, the oil pressure fluctuation in the previous clearance compensation mechanism is larger, the stability is weaker and the braking effect is also reduced because the oil discharging path is not directly closed;
secondly, the control valve mechanism in the design is a control valve design of an internal one-way valve, and the control valve is required to be installed in the rocker arm, so that the self structure of the control valve is smaller, and at the moment, the one-way valve is also required to be arranged in the control valve, so that the manufacturing precision is higher, the processing difficulty is higher, the cost is higher, and in addition, once the control valve is deviated during use, the smooth braking is prevented, and the safety is weaker.
Disclosure of Invention
The invention aims to overcome the defects and problems of poor braking effect, high manufacturing precision and high production cost in the prior art, and provides an engine brake oil way control device with good braking effect, low manufacturing precision and low production cost and a use method thereof.
In order to achieve the above object, the technical solution of the present invention is: the engine brake oil way control device comprises a rocker arm and a brake actuating mechanism, a rocker arm shaft and a rocker arm roller which are arranged on the rocker arm, wherein the rocker arm shaft is communicated with the brake actuating mechanism through a brake oil way, the side part of the brake actuating mechanism is communicated with an oil discharging way, a brake piston which moves up and down along the axial direction of the brake actuating mechanism is arranged in the brake actuating mechanism, the bottom of the brake piston is connected with an elephant foot which is positioned right below the brake piston, and a valve gap is formed between the bottom of a ball socket in the elephant foot and a valve yoke which is positioned right below the elephant foot;
the engine brake oil way control device also comprises a control valve arranged in the rocker arm, the control valve comprises a control chamber and a control piston, a control spring and a control spring seat which are sequentially arranged in the control chamber from top to bottom, the control piston moves up and down along the inner wall of the control chamber, the bottom of the control piston is connected with the middle part of the control spring seat through the control spring, a through control oil discharging hole is formed in the control spring seat and positioned below the control spring, and the part positioned between the control piston and the control spring seat on the side wall of the control chamber is communicated with an oil discharging way;
The brake oil way comprises an intersecting oblique oil way and a longitudinal oil way, the low port of the oblique oil way is communicated with an oil way in the shaft of the rocker shaft, the high port of the oblique oil way is communicated with a brake oil cavity in the brake actuating mechanism, the side part of the brake oil cavity is communicated with the side wall of the control chamber through the oil unloading way, the top opening of the control chamber is communicated with the bottom of the longitudinal oil way, and the top of the longitudinal oil way extends to the upper part of the control chamber after passing through the oblique oil way.
The top of the longitudinal oil way penetrates through the inclined oil way and then extends to the upper part of the inclined oil way until the top of the longitudinal oil way is intersected with the outer wall of the rocker arm, and a longitudinal plug is arranged in the intersection part.
The low port of the inclined oil way is communicated with the rotating hole where the rocker shaft is located after passing through the arc-shaped hole, and an in-shaft oil way is radially arranged inside the rocker shaft so as to be communicated with the rotating hole.
The arc of the arc-shaped hole ranges from 45 degrees to 120 degrees.
The length of the oil path in the shaft is equal to the radius of the rocker shaft.
The middle part of the control spring seat is provided with a communicated spring mounting groove and a T-shaped control oil discharging hole from top to bottom, the bottom end of the control spring is embedded in the spring mounting groove, the bottom of the spring mounting groove is communicated with the small-diameter end of the control oil discharging hole, and the large-diameter end of the control oil discharging hole is communicated with the bottom surface of the control spring seat.
The outer wall of the control spring seat is in threaded connection with the inner wall of the control chamber.
The application method of the engine brake oil way control device comprises a non-brake working condition operation process, wherein the non-brake working condition operation process sequentially comprises the following steps of:
under the non-braking working condition, the pressure of the engine oil entering the braking oil way through the rocker shaft is smaller than the spring force of the control spring, the engine oil entering the longitudinal oil way cannot compress the control spring, the control spring is in an extending state, and at the moment, the engine oil entering the braking oil way sequentially passes through the oblique oil way, the braking oil cavity, the oil discharging way and the control chamber and finally flows out of the control oil discharging hole.
The using method further comprises a braking working condition operation process, and the braking working condition operation process sequentially comprises the following steps: under a braking working condition, the pressure of engine oil entering the braking oil way through the rocker arm shaft is larger than the spring force of the control spring, the engine oil entering the longitudinal oil way continuously compresses the control spring until the descending control piston blocks the oil way to ensure that the engine oil in the oil way does not enter the control chamber any more, at the moment, the engine oil flowing into the braking oil way from the oblique oil way does not flow out through the oil way, the braking oil way forms a closed cavity, and when the engine oil continuously enters, a ball socket in the like foot is subjected to reaction force due to the movement of the rocker arm and the rocker arm roller, the reaction force acts on the braking oil way through the like foot and the braking piston, the oil pressure in the braking oil way is continuously increased until the braking oil way forms a high-pressure oil way, the oblique oil way is blocked, and no more engine oil enters the braking oil way, and at the moment, the braking is started; and then, if the braking is required to be closed, only the pressure of the engine oil entering the braking oil way through the rocker shaft is reduced until the engine oil pressure is smaller than the spring force of the control spring, the control piston moves upwards under the rebound force of the control spring until the oil discharging way and the control chamber are conducted, and at the moment, the engine oil in the braking oil cavity flows out through the oil discharging way, the control chamber and the control oil discharging hole in sequence, and the braking is released.
The brake actuating mechanism comprises a brake chamber, an adjusting bolt, a ball valve spring seat, a brake spring, a brake oil cavity, a brake piston and an elephant foot, wherein the bottom end of the adjusting bolt is positioned in the brake chamber, the top end of the adjusting bolt sequentially penetrates through the brake chamber and a rocker arm and then is fixedly connected with the outer wall of the rocker arm, the side surface and the bottom surface of the bottom end of the adjusting bolt are respectively provided with a corresponding side oil hole and a corresponding bottom oil hole, the high port of an inclined oil way is communicated with the bottom oil hole through the side oil hole, the ball valve is arranged right below the bottom oil hole, the ball valve spring is arranged right below the ball valve, the bottom end of the ball valve spring is communicated with the spring seat bottom hole at the bottom of the ball valve spring seat, the ball valve and the ball valve spring are contained in the interior of the ball valve spring seat, the brake spring is sleeved outside the ball valve spring, the brake piston is sleeved outside the brake spring, the outer wall of the brake piston moves up and down along the inner wall of the brake chamber in the brake oil cavity, a brake oil unloading hole is arranged on the side wall of the brake oil cavity and is communicated with the oil unloading passage, and the ball unloading hole is arranged below the brake chamber;
The engine oil flowing into the brake oil cavity from the oblique oil path does not flow out through the oil unloading path, and the formation of the brake oil cavity into a closed cavity means that: the engine oil in the oblique oil way sequentially enters the ball valve spring seat through the side oil hole and the bottom oil hole and presses down the ball valve, meanwhile, the engine oil entering the ball valve spring seat flows into the brake piston through the spring seat bottom hole and gradually fills the brake oil cavity, and then flows into the oil discharging way through the brake oil discharging hole, and the engine oil in the brake oil cavity is continuously entered and cannot flow out due to the fact that the oil discharging way is not communicated with the control chamber, so that the brake oil cavity forms a closed cavity;
continuously increasing the oil pressure in the brake oil cavity until the brake oil cavity forms a high-pressure oil cavity, wherein the inclined oil path is blocked, which means that: the reaction force acting on the brake oil cavity can increase the oil pressure in the brake oil cavity, the increased oil pressure can compress the ball valve spring from bottom to top, the ball valve spring stressed upwards pushes the ball valve to enable the ball valve to move upwards until the ball valve blocks the oil hole on the bottom surface, so that engine oil in the inclined oil path is not fed any more, the inclined oil path is blocked, and no engine oil enters the brake oil cavity any more.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to an engine brake oil way control device and a use method thereof, wherein a brake oil way comprises an oblique oil way and a longitudinal oil way which are intersected, wherein the oblique oil way is used for conveying engine oil into a brake oil cavity, and the longitudinal oil way is used for controlling a discharge oil way together with a control valve, and the engine brake oil way control device has the advantages that: firstly, in the braking process, the control valve directly acts on the oil discharging path, does not directly prevent engine oil from entering, is easy to form a stable closed cavity in the braking oil cavity, is beneficial to the realization of braking, and has good braking effect and strong stability; secondly, the control valve is responsible for limiting the oil discharging way and simultaneously directly sensing the pressure of the entering engine oil, so that the control valve can be directly regulated and controlled to control the oil discharging way only by regulating the pressure of the engine oil, the intuitiveness is stronger, the sensitivity is higher, and the control effect is better; finally, the control valve adopted by the design has clear structure, can realize closing or opening of the oil discharging path by only integrating the control of oil pressure and a spring on the piston, is easy to manufacture and control, is not easy to generate errors during use, and has strong safety. Therefore, the invention has the advantages of better braking effect, stronger stability, low requirement on manufacturing precision and lower production cost.
2. According to the engine brake oil way control device and the application method thereof, after braking is started, if braking is needed to be closed, only engine oil pressure entering the system is needed to be reduced, the control piston is controlled to ascend by the resilience force of the control valve spring, the oil discharging way is conducted again, and high-pressure engine oil in the brake oil cavity is discharged rapidly, so that the engine brake oil way control device is very convenient and rapid. Therefore, the present invention can rapidly release the brake.
3. In the engine brake oil way control device and the use method thereof, in the braking process after braking is started, as the oil discharge way is directly limited by the control valve, the stability of the engine oil pressure in a certain range can be ensured by the control valve spring even though the engine oil pressure possibly fluctuates. Therefore, the invention has stronger stability.
4. In the engine brake oil way control device and the use method thereof, under the condition of no engine oil, the height of the adjusting bolt in the vertical direction can be adjusted through the adjusting bolt and the adjusting nut in the brake actuating mechanism (which are in threaded fit with the adjusting bolt to fix the top of the adjusting bolt on the outer wall of the rocker arm), so that the height of the elephant foot can be adjusted, and a certain clearance is arranged at the bottom of the ball socket in the elephant foot, so that the adjustment of the valve clearance can be realized. Therefore, the valve clearance adjusting effect of the invention is better.
5. The invention relates to an engine brake oil way control device and a use method thereof, wherein a brake spring is arranged in a brake piston, which is favorable for keeping the contact of a foot and a valve (or a valve bridge and a valve yoke) and a rocker roller and a cam shaft at all times and is favorable for reducing noise in the operation of a mechanism. Thus, the present invention facilitates reducing noise in operation of the mechanism.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic illustration of the present invention in a non-braking condition.
Fig. 3 is a schematic view of the structure of the present invention during braking oil filling.
Fig. 4 is a schematic view of the present invention in a braking condition.
Fig. 5 is an enlarged schematic view of the brake actuator of fig. 2, 3, 4 (from left to right).
Fig. 6 is a schematic perspective view of the adjusting bolt of fig. 1.
Fig. 7 is a cross-sectional view of fig. 6.
Fig. 8 is a schematic perspective view of a spring seat of the ball valve of fig. 1.
Fig. 9 is a cross-sectional view of fig. 8.
In the figure: the brake actuator 1, the adjusting bolt 2, the side oil hole 21, the bottom oil hole 22, the oil passing chamfer 221, the adjusting nut 23, the screw fixing portion 24, the screw connecting portion 241, the screw oil passing portion 25, the oil passing top portion 251, the oil passing waist portion 252, the oil passing bottom portion 253, the oil passing groove 254, the oil passing gap 26, the inner bottom edge 261, the hole surrounding distance 27, the ball valve spring seat 3, the spring seat bottom hole 31, the base barrel portion 32, the base through hole 321, the base claw 33, the transverse claw 331, the vertical claw 332, the reverse claw edge 333, the spacing claw gap 34, the limiting ring surface 35, the rocker arm 4, the rocker arm roller 41, the roller pin 42, the ball valve spring seat 3, the spacing groove 31, the base barrel portion 32, the base through hole 321 the brake oil passage 5, the oblique oil passage 51, the longitudinal oil passage 52, the longitudinal plug 53, the oil discharge passage 6, the control valve 7, the control chamber 71, the control piston 72, the control spring 73, the control spring seat 74, the control oil discharge hole 75, the small diameter end 751, the large diameter end 752, the spring mounting groove 76, the control spring seat bottom hole 77, the rocker shaft 8, the in-shaft oil passage 81, the arc-shaped hole 82, the rotation hole 83, the brake chamber 9, the ball valve 10, the ball valve spring 11, the brake spring 12, the brake oil chamber 13, the brake piston 14, the elephant foot 15, the ball head 151, the ball socket 152, the brake oil discharge hole 16, the air valve yoke 17, and the air valve gap 18.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 9, an engine brake oil path control device comprises a rocker arm 4 and a brake actuating mechanism 1, a rocker arm shaft 8 and a rocker arm roller 41 which are arranged on the rocker arm, wherein the rocker arm shaft 8 is communicated with the brake actuating mechanism 1 through a brake oil path 5, the side part of the brake actuating mechanism 1 is communicated with an oil discharge path 6, a brake piston 14 which moves up and down along the axial direction of the brake actuating mechanism 1 is arranged in the brake actuating mechanism 1, the bottom of the brake piston 14 is connected with an image foot 15 which is positioned right below the brake piston, and a valve gap 18 is formed between the bottom of a ball socket 152 in the image foot 15 and a valve yoke 17 which is positioned right below the image foot;
the engine brake oil way control device also comprises a control valve 7 arranged in the rocker arm 4, wherein the control valve 7 comprises a control chamber 71 and a control piston 72, a control spring 73 and a control spring seat 74 which are sequentially arranged in the control chamber from top to bottom, the control piston 72 moves up and down along the inner wall of the control chamber 71, the bottom of the control piston 72 is connected with the middle part of the control spring seat 74 through the control spring 73, a through control oil discharging hole 75 is formed in the part, positioned below the control spring 73, in the control spring seat 74, and the part, positioned between the control piston 72 and the control spring seat 74, on the side wall of the control chamber 71 is communicated with the oil discharging way 6;
The brake oil path 5 comprises an intersected oblique oil path 51 and a longitudinal oil path 52, the low port of the oblique oil path 51 is communicated with an in-shaft oil path 81 of the rocker shaft 8, the high port of the oblique oil path 51 is communicated with a brake oil cavity 13 in the brake actuating mechanism 1, the side part of the brake oil cavity 13 is communicated with the side wall of the control chamber 71 through the oil unloading path 6, the top end opening of the control chamber 71 is communicated with the bottom of the longitudinal oil path 52, and the top of the longitudinal oil path 52 extends to the upper side of the brake oil cavity through the oblique oil path 51.
The top of the longitudinal oil path 52 extends to the upper part of the oblique oil path 51 until the top of the longitudinal oil path intersects with the outer wall of the rocker arm 4, and a longitudinal plug 53 is arranged in the intersection part.
The lower port of the inclined oil passage 51 is communicated with a rotary hole 83 where the rocker shaft 8 is located after passing through the arc-shaped hole 82, and an in-shaft oil passage 81 is radially provided in the rocker shaft 8 so as to communicate with the rotary hole 83.
The arc of the arcuate aperture 82 ranges from 45 degrees to 120 degrees.
The length of the in-shaft oil passage 81 is equal to the radius of the rocker shaft 8.
The middle part of the control spring seat 74 is provided with a communicated spring mounting groove 76 and a T-shaped control oil discharging hole 75 from top to bottom, the bottom end of the control spring 73 is embedded in the spring mounting groove 76, the bottom of the spring mounting groove 76 is communicated with a small diameter end 751 of the control oil discharging hole 75, and a large diameter end 752 of the control oil discharging hole 75 is communicated with the bottom surface of the control spring seat 74.
The outer wall of the control spring seat 74 is threadedly coupled to the inner wall of the control chamber 71.
The application method of the engine brake oil way control device comprises a non-brake working condition operation process, wherein the non-brake working condition operation process sequentially comprises the following steps of:
under the non-braking working condition, the pressure of the engine oil entering the brake oil path 5 through the rocker shaft 8 is smaller than the spring force of the control spring 73, the engine oil entering the longitudinal oil path 52 cannot compress the control spring 73, the control spring 73 is in an extending state, and at the moment, the engine oil entering the brake oil path 5 sequentially passes through the inclined oil path 51, the brake oil cavity 13, the oil discharging path 6 and the control chamber 71 and finally flows out of the control oil discharging hole 75.
The using method further comprises a braking working condition operation process, and the braking working condition operation process sequentially comprises the following steps: under a braking condition, the pressure of the engine oil entering the brake oil passage 5 through the rocker shaft 8 is larger than the spring force of the control spring 73, the engine oil entering the longitudinal oil passage 52 continuously compresses the control spring 73 until the descending control piston 72 blocks the oil discharging passage 6 so that the engine oil in the oil discharging passage 6 does not enter the control chamber 71 any more, at the moment, the engine oil flowing into the brake oil chamber 13 from the oblique oil passage 51 does not flow out of the oil discharging passage 6 any more, the brake oil chamber 13 forms a closed chamber, and when the engine oil continuously enters, the ball socket 152 in the elephant foot 15 is subjected to a reaction force due to the movement of the rocker arm 4 and the rocker arm roller 41, the reaction force acts on the brake oil chamber 13 through the elephant foot 15 and the brake piston 14, and the oil pressure in the brake oil chamber 13 is continuously increased until the brake oil chamber 13 forms a high-pressure oil chamber, the oblique oil passage 51 is blocked, no more engine oil enters the brake oil chamber 13, and at the moment, and the brake is started; then, if the brake is to be turned off, the pressure of the oil entering the brake oil passage 5 through the rocker shaft 8 is only reduced until the pressure of the oil is smaller than the spring force of the control spring 73, the control piston 72 moves upward under the rebound force of the control spring 73 until the oil discharge passage 6 and the control chamber 71 are turned on, and at this time, the oil in the brake oil chamber 13 flows out through the oil discharge passage 6, the control chamber 71 and the control oil discharge hole 75 in order, and the brake is released.
The brake actuating mechanism 1 comprises a brake chamber 9, an adjusting bolt 2, a ball valve 10, a ball valve spring 11, a ball valve spring seat 3, a brake spring 12, a brake oil cavity 13, a brake piston 14 and a elephant foot 15, wherein the bottom end of the adjusting bolt 2 is positioned in the brake chamber 9, the top end of the adjusting bolt 2 sequentially penetrates through the brake chamber 9 and a rocker arm 4 and is fixedly connected with the outer wall of the rocker arm 4, the side surface and the bottom surface of the bottom end of the adjusting bolt 2 are respectively provided with a corresponding side oil hole 21 and a bottom oil hole 22, the high end of an inclined oil way 51 is communicated with the bottom oil hole 22 after passing through the side oil hole 21, the ball valve 10 is arranged right below the bottom oil hole 22, the ball valve spring 11 is arranged right below the ball valve 10, the bottom end of the ball valve spring 11 is communicated with a spring seat bottom hole 31 at the bottom of the ball valve spring seat 3, the ball valve 10 and the ball valve spring 11 are contained in the ball valve spring seat 3, the brake spring 12 is sleeved outside the ball valve spring seat 3, the brake piston 14 is sleeved outside the brake oil cavity 13, the outer wall of the brake piston 14 moves up and down along the inner wall of the brake chamber 9, the side wall of the brake oil cavity 13 is provided with the corresponding side oil hole 14, the position 16 between the ball valve piston 14 and the ball valve spring seat 3 is positioned above the brake oil hole 6 and the brake oil hole 15 is communicated with the bottom of the brake chamber 9;
The engine oil flowing into the brake oil chamber 13 through the oblique oil passage 51 does not flow out through the oil discharge passage 6 any more, and the formation of a closed chamber in the brake oil chamber 13 means that: the engine oil in the oblique oil path 51 sequentially enters the ball valve spring seat 3 through the side oil hole 21 and the bottom oil hole 22 and presses down the ball valve 10, meanwhile, the engine oil entering the ball valve spring seat 3 flows into the brake piston 14 through the spring seat bottom hole 31, gradually fills the brake oil cavity 13, flows into the oil discharging path 6 through the brake oil discharging hole 16, and the engine oil in the brake oil cavity 13 continuously enters and cannot flow out because the oil discharging path 6 is not communicated with the control chamber 71, so that the brake oil cavity 13 forms a closed cavity;
the continuous increase of the oil pressure in the brake oil chamber 13 until the brake oil chamber 13 forms a high-pressure oil chamber, and the blockage of the oblique oil passage 51 means that: the reaction force acting on the brake oil chamber 13 increases the oil pressure in the brake oil chamber 13, the increased oil pressure compresses the ball valve spring 11 from bottom to top, the ball valve spring 11 under stress pushes the ball valve 10 upwards until the ball valve 10 blocks the bottom oil hole 22, so that the engine oil in the inclined oil path 51 is not fed any more, the inclined oil path 51 is blocked, and no more engine oil enters the brake oil chamber 13.
The principle of the invention is explained as follows:
The elephant foot 15 in the invention is a generic name of a ball head 151 and a ball socket 152, and the bottom of the ball head 151 is matched with a groove in the ball socket 152. When the invention is applied, the pressure of the engine oil flowing from the outside is controlled by the electromagnetic valve, namely, the magnitude of the engine oil pressure is controlled by the electromagnetic valve.
Valve lash adjustment: the valve clearance can ensure the normal work of the valve, too small clearance can cause the valve to be closed untight, influence the starting and the power performance, and can increase the abrasion of the valve rocker and the cam shaft, too large valve clearance can cause insufficient air intake and exhaust, and can generate more obvious knocking sound.
Braking condition: under the braking working condition, the elephant foot can receive the reaction force from the valve bridge (or the valve yoke), the reaction force can sequentially act on the braking oil cavity through the elephant foot and the braking piston, so that the oil pressure in the braking oil cavity is increased, the increased oil pressure can firstly compress the ball valve spring, then the ball valve spring pushes the ball valve to ascend to block the oil hole on the bottom surface under the adjusting bolt, and further the continuous inflow of engine oil is blocked, so that a high-pressure oil cavity is formed in the braking oil cavity, and braking is started. Besides, the braking spring in the braking piston can ensure that the ball head and the ball socket are kept in contact under any working condition, and if the spring is not used, gaps can be formed between the ball socket and the valve bridge in the operation process, the gaps can cause collision, and the collision can increase noise.
Example 1:
referring to fig. 1 to 9, an engine brake oil path control device comprises a rocker arm 4 and a brake actuating mechanism 1, a rocker arm shaft 8 and a rocker arm roller 41 which are arranged on the rocker arm, wherein the rocker arm shaft 8 is communicated with the brake actuating mechanism 1 through a brake oil path 5, the side part of the brake actuating mechanism 1 is communicated with an oil discharge path 6, a brake piston 14 which moves up and down along the axial direction of the brake actuating mechanism 1 is arranged in the brake actuating mechanism 1, the bottom of the brake piston 14 is connected with an image foot 15 which is positioned right below the brake piston, and a valve gap 18 is formed between the bottom of a ball socket 152 in the image foot 15 and a valve yoke 17 which is positioned right below the image foot;
the engine brake oil way control device also comprises a control valve 7 arranged in the rocker arm 4, wherein the control valve 7 comprises a control chamber 71 and a control piston 72, a control spring 73 and a control spring seat 74 which are sequentially arranged in the control chamber from top to bottom, the control piston 72 moves up and down along the inner wall of the control chamber 71, the bottom of the control piston 72 is connected with the middle part of the control spring seat 74 through the control spring 73, a through control oil discharging hole 75 is formed in the part, positioned below the control spring 73, in the control spring seat 74, and the part, positioned between the control piston 72 and the control spring seat 74, on the side wall of the control chamber 71 is communicated with the oil discharging way 6; the brake oil path 5 comprises an intersected oblique oil path 51 and a longitudinal oil path 52, the low port of the oblique oil path 51 is communicated with an in-shaft oil path 81 of the rocker shaft 8, the high port of the oblique oil path 51 is communicated with a brake oil cavity 13 in the brake actuating mechanism 1, the side part of the brake oil cavity 13 is communicated with the side wall of the control chamber 71 through the oil unloading path 6, the top end opening of the control chamber 71 is communicated with the bottom of the longitudinal oil path 52, and the top of the longitudinal oil path 52 extends to the upper side of the brake oil cavity through the oblique oil path 51.
The application method of the engine brake oil way control device comprises a non-brake working condition operation process, wherein the non-brake working condition operation process sequentially comprises the following steps of:
under the non-braking working condition, the pressure of the engine oil entering the brake oil path 5 through the rocker shaft 8 is smaller than the spring force of the control spring 73, the engine oil entering the longitudinal oil path 52 cannot compress the control spring 73, the control spring 73 is in an extending state, and at the moment, the engine oil entering the brake oil path 5 sequentially passes through the inclined oil path 51, the brake oil cavity 13, the oil discharging path 6 and the control chamber 71 and finally flows out of the control oil discharging hole 75.
Example 2:
the basic content is the same as in example 1, except that:
the using method further comprises a braking working condition operation process, and the braking working condition operation process sequentially comprises the following steps: under a braking condition, the pressure of the engine oil entering the brake oil passage 5 through the rocker shaft 8 is larger than the spring force of the control spring 73, the engine oil entering the longitudinal oil passage 52 continuously compresses the control spring 73 until the descending control piston 72 blocks the oil discharging passage 6 so that the engine oil in the oil discharging passage 6 does not enter the control chamber 71 any more, at the moment, the engine oil flowing into the brake oil chamber 13 from the oblique oil passage 51 does not flow out of the oil discharging passage 6 any more, the brake oil chamber 13 forms a closed chamber, and when the engine oil continuously enters, the ball socket 152 in the elephant foot 15 is subjected to a reaction force due to the movement of the rocker arm 4 and the rocker arm roller 41, the reaction force acts on the brake oil chamber 13 through the elephant foot 15 and the brake piston 14, and the oil pressure in the brake oil chamber 13 is continuously increased until the brake oil chamber 13 forms a high-pressure oil chamber, the oblique oil passage 51 is blocked, no more engine oil enters the brake oil chamber 13, and at the moment, and the brake is started; then, if the brake is to be turned off, the pressure of the oil entering the brake oil passage 5 through the rocker shaft 8 is only reduced until the pressure of the oil is smaller than the spring force of the control spring 73, the control piston 72 moves upward under the rebound force of the control spring 73 until the oil discharge passage 6 and the control chamber 71 are turned on, and at this time, the oil in the brake oil chamber 13 flows out through the oil discharge passage 6, the control chamber 71 and the control oil discharge hole 75 in order, and the brake is released.
Example 3:
the basic content is the same as in example 2, except that:
the brake actuating mechanism 1 comprises a brake chamber 9, an adjusting bolt 2, a ball valve 10, a ball valve spring 11, a ball valve spring seat 3, a brake spring 12, a brake oil cavity 13, a brake piston 14 and a elephant foot 15, wherein the bottom end of the adjusting bolt 2 is positioned in the brake chamber 9, the top end of the adjusting bolt 2 sequentially penetrates through the brake chamber 9 and the rocker arm 4 and is fixedly connected with the outer wall of the rocker arm 4 (preferably, the top end of the adjusting bolt 2 is fixedly connected with the outer wall of the rocker arm 4 through an adjusting nut 23), the side surface and the bottom surface of the bottom end of the adjusting bolt 2 are respectively provided with a corresponding side oil hole 21 and a bottom oil hole 22, the high port of an inclined oil way 51 is communicated with the bottom oil hole 22 after passing through the side oil hole 21, the lower part of the bottom oil hole 22 is directly opposite to the ball valve 10, the lower part of the ball valve 10 is provided with the ball valve spring 11, the bottom end of the ball valve spring 11 is communicated with a spring seat bottom hole 31 at the bottom of the ball valve spring seat 3, the ball valve 10 and the ball valve spring seat 11 is contained in the ball valve, the outer part of the ball valve spring seat 3 is sleeved with the brake spring 12, the brake piston 14 is sleeved outside the brake oil cavity 13, the brake piston 14 moves in the brake chamber 13 along the upper side wall 9 and the brake chamber, the upper part and lower part of the brake oil hole is positioned between the brake oil hole 13 and the brake piston seat 6 is connected with the brake oil hole 16 and the lower part of the brake piston 16.
The engine oil flowing into the brake oil chamber 13 through the oblique oil passage 51 does not flow out through the oil discharge passage 6 any more, and the formation of a closed chamber in the brake oil chamber 13 means that: the engine oil in the oblique oil path 51 sequentially enters the ball valve spring seat 3 through the side oil hole 21 and the bottom oil hole 22 and presses down the ball valve 10, meanwhile, the engine oil entering the ball valve spring seat 3 flows into the brake piston 14 through the spring seat bottom hole 31, gradually fills the brake oil cavity 13, flows into the oil discharging path 6 through the brake oil discharging hole 16, and the engine oil in the brake oil cavity 13 continuously enters and cannot flow out due to the fact that the oil discharging path 6 is not conducted with the control chamber 71, so that the brake oil cavity 13 forms a closed cavity.
The continuous increase of the oil pressure in the brake oil chamber 13 until the brake oil chamber 13 forms a high-pressure oil chamber, and the blockage of the oblique oil passage 51 means that: the reaction force acting on the brake oil chamber 13 increases the oil pressure in the brake oil chamber 13, the increased oil pressure compresses the ball valve spring 11 from bottom to top, the ball valve spring 11 under stress pushes the ball valve 10 upwards until the ball valve 10 blocks the bottom oil hole 22, so that the engine oil in the inclined oil path 51 is not fed any more, the inclined oil path 51 is blocked, and no more engine oil enters the brake oil chamber 13.
Example 4:
the basic content is the same as in example 1, except that:
The lower port of the inclined oil passage 51 is communicated with a rotary hole 83 where the rocker shaft 8 is located after passing through the arc-shaped hole 82, and an in-shaft oil passage 81 is radially provided in the rocker shaft 8 so as to communicate with the rotary hole 83.
Example 5:
the basic content is the same as in example 1, except that:
the arc of the arcuate aperture 82 ranges from 45 degrees to 120 degrees, preferably 90 degrees. The length of the in-shaft oil passage 81 is equal to the radius of the rocker shaft 8.
Example 6:
the basic content is the same as in example 1, except that:
the middle part of the control spring seat 74 is provided with a communicated spring mounting groove 76 and a T-shaped control oil discharging hole 75 from top to bottom, the bottom end of the control spring 73 is embedded in the spring mounting groove 76, the bottom of the spring mounting groove 76 is communicated with a small diameter end 751 of the control oil discharging hole 75, and a large diameter end 752 of the control oil discharging hole 75 is communicated with the bottom surface of the control spring seat 74. The outer wall of the control spring seat 74 is threadedly coupled to the inner wall of the control chamber 71.
Example 7:
the basic content is the same as in example 3, except that:
the adjusting bolt 2 is of a T-shaped structure and comprises a screw fixing part 24 and a screw oil passing part 25 which are mutually perpendicular; the oil passing portion 25 is of a waist-shaped structure, and comprises an oil passing top 251, an oil passing waist 252 and an oil passing bottom 253 which are sequentially connected, wherein the top surface of the oil passing top 251 is vertically connected with the bottom of the screw fixing portion 24, the bottom surface of the oil passing top 251, the top surface of the oil passing bottom 253 and the oil passing waist 252 enclose a semi-open annular oil passing groove 254, and at least two side oil holes 21 (preferably four and uniformly arranged along the same circumference) are uniformly formed in the oil passing waist 252 so as to be communicated with a bottom oil hole 22 formed in the oil passing portion 25. The top of the bottom oil hole 22 is higher than the side oil hole 21, the bottom of the bottom oil hole 22 is level with the bottom of the oil passing bottom 253, the lowest point of the side oil hole 21 intersects with the top of the oil passing bottom 253, and an oil passing chamfer 221 is formed in the intersection part. An oil passing gap 26 corresponding to the side oil hole 21 is formed in the oil passing top 251, an inner bottom 261 of the oil passing gap 26 is located right above the corresponding side oil hole 21, a bottom of the side oil hole 21 is connected with a top surface of the oil passing bottom 253, and a hole surrounding distance 27 is formed between a junction of the side oil hole 21 and the oil passing bottom 253 and a side wall of the oil passing bottom 253. An external thread is arranged on the side wall of the screw fixing part 24 near the top end of the side wall so as to be in threaded connection with the adjusting nut 23, a screw connecting hole 241 is formed in the top end of the screw fixing part 24, and the cross section of the screw connecting hole 241 is polygonal.
Example 8:
the basic content is the same as in example 3, except that:
the ball valve spring seat 3 comprises a base barrel 32 and at least two base claw parts 33 (preferably 4 base claw parts are uniformly arranged along the same circumference), the base claw parts 33 are of an L-shaped structure and comprise a transverse claw part 331 and a vertical claw part 332, and the top end of the vertical claw part 332 is connected with the inner end of the transverse claw part 331; the middle part of the base barrel part 32 is provided with a through base through hole 321 communicated with the spring seat bottom hole 31, the top periphery of the base barrel part 32 is connected with the bottom end of a vertical claw part 332, and the vertical claw part 332 is uniformly arranged around the top periphery of the base barrel part 32. The ball valve spring seat 3 further comprises any one or two or three of the following technical characteristics: the outer end of the transverse claw 331 is connected with a downward extending inverted claw 333; a spacing claw gap 34 is arranged between the adjacent vertical claw parts 332; the diameter of the base through hole 321 is larger than that of the spring seat bottom hole 31, and a limiting ring surface 35 is arranged between the bottom edge of the base through hole 321 and the top edge of the spring seat bottom hole 31.

Claims (10)

1. The utility model provides an engine braking oil circuit controlling means, includes rocking arm (4) and brake actuating mechanism (1) that set up on it, rocking arm axle (8) and rocking arm roller (41), rocking arm axle (8) communicate with each other with brake actuating mechanism (1) through brake oil circuit (5), the lateral part of brake actuating mechanism (1) communicates with each other with oil discharging way (6), the inside of brake actuating mechanism (1) is provided with brake piston (14) that reciprocate along its axial, the bottom of brake piston (14) is connected with image foot (15) that are located under it, be formed with valve clearance (18) between the bottom of ball socket (152) and air valve yoke (17) that are located under it in image foot (15), its characterized in that:
The engine brake oil way control device also comprises a control valve (7) arranged in the rocker arm (4), wherein the control valve (7) comprises a control chamber (71) and a control piston (72), a control spring (73) and a control spring seat (74) which are sequentially arranged in the control chamber from top to bottom, the control piston (72) moves up and down along the inner wall of the control chamber (71), the bottom of the control piston (72) is connected with the middle part of the control spring seat (74) through the control spring (73), a through control oil discharging hole (75) is formed in the part, below the control spring (73), of the control spring seat (74), and the part, positioned between the control piston (72) and the control spring seat (74), on the side wall of the control chamber (71) is communicated with the oil discharging way (6);
the brake oil way (5) comprises an intersected oblique oil way (51) and a longitudinal oil way (52), the low port of the oblique oil way (51) is communicated with an in-shaft oil way (81) of the rocker shaft (8), the high port of the oblique oil way (51) is communicated with a brake oil cavity (13) in the brake actuating mechanism (1), the side part of the brake oil cavity (13) is communicated with the side wall of the control chamber (71) through the oil unloading way (6), the top end opening of the control chamber (71) is communicated with the bottom of the longitudinal oil way (52), and the top of the longitudinal oil way (52) penetrates through the oblique oil way (51) and then extends to the upper part of the oblique oil way;
The brake actuating mechanism (1) comprises a brake chamber (9), an adjusting bolt (2), a ball valve (10), a ball valve spring (11), a ball valve spring seat (3), a brake spring (12), a brake oil cavity (13), a brake piston (14) and a elephant foot (15), wherein the bottom end of the adjusting bolt (2) is positioned in the brake chamber (9), the top end of the adjusting bolt (2) sequentially penetrates through the brake chamber (9) and a rocker arm (4) and is fixedly connected with the outer wall of the rocker arm (4), a corresponding side oil hole (21) and a corresponding bottom oil hole (22) are respectively formed in the side surface and the bottom surface of the bottom end of the adjusting bolt (2), the high port of an oblique oil channel (51) is communicated with the bottom oil hole (22) after passing through the side oil hole (21), the ball valve (10) is arranged right below the bottom oil hole (22), the ball valve spring (11) is right arranged right below the ball valve spring (10), the bottom end of the ball valve spring (11) is communicated with a bottom hole (31) at the bottom of the ball valve spring seat (3), the ball valve (3) is contained with the ball valve (10) and the ball valve spring (11), the outside of the ball valve (3) is sleeved with the ball valve, the outside of the ball valve seat (3) and the ball valve seat is sleeved with the brake oil cavity (12), the outer wall of the brake piston (14) moves up and down along the inner wall of the brake chamber (9) in the brake oil chamber (13), a brake oil discharging hole (16) is formed in the side wall of the brake oil chamber (13) and positioned between the brake piston (14) and the ball valve spring seat (3) so as to be communicated with the oil discharging path (6), and the part, positioned below the brake chamber (9), on the bottom of the brake piston (14) is connected with the elephant foot (15); the top end of the adjusting bolt (2) is fixedly connected with the outer wall of the rocker arm (4) through an adjusting nut (23);
The adjusting bolt (2) is of a T-shaped structure and comprises a screw fixing part (24) and a screw oil passing part (25) which are mutually perpendicular; the spiral oil passing part (25) is of a waist-shaped structure and comprises an oil passing top (251), an oil passing waist (252) and an oil passing bottom (253) which are sequentially connected, wherein the top surface of the oil passing top (251) is vertically connected with the bottom of the spiral fixing part (24), the bottom surface of the oil passing top (251), the top surface of the oil passing bottom (253) and the oil passing waist (252) enclose a semi-open annular oil passing groove (254), and at least two side oil holes (21) are uniformly formed in the oil passing waist (252) so as to be communicated with a bottom oil hole (22) formed in the spiral oil passing part (25);
the top of the bottom oil hole (22) is higher than the side oil hole (21), the bottom of the bottom oil hole (22) is level with the bottom of the oil passing bottom (253), and the lowest point of the side oil hole (21) is intersected with the top surface of the oil passing bottom (253);
the ball valve spring seat (3) comprises a base cylinder part (32) and at least two base claw parts (33), wherein the base claw parts (33) are of an L-shaped structure and comprise transverse claw parts (331) and vertical claw parts (332), and the top ends of the vertical claw parts (332) are connected with the inner ends of the transverse claw parts (331); a through base through hole (321) is formed in the middle of the base barrel part (32) so as to be communicated with the spring seat bottom hole (31), the top periphery of the base barrel part (32) is connected with the bottom end of a vertical claw part (332), and the vertical claw part (332) is uniformly arranged around the top periphery of the base barrel part (32); the ball valve spring seat (3) further comprises any one or two or three of the following technical characteristics: the outer end of the transverse claw part (331) is connected with a downward extending inverted claw edge (333); a spacing claw gap (34) is arranged between the adjacent vertical claw parts (332); the diameter of the base through hole (321) is larger than that of the spring seat bottom hole (31), and a limiting ring surface (35) is arranged between the bottom edge of the base through hole (321) and the top edge of the spring seat bottom hole (31).
2. The engine brake oil passage control device according to claim 1, characterized in that: the top of the longitudinal oil way (52) penetrates through the inclined oil way (51) and then extends to the upper part of the inclined oil way until the inclined oil way is intersected with the outer wall of the rocker arm (4), and a longitudinal plug (53) is arranged in the intersecting part.
3. The engine brake oil passage control device according to claim 1 or 2, characterized in that: the low port of the inclined oil path (51) is communicated with a rotary hole (83) where the rocker shaft (8) is located after passing through an arc-shaped hole (82), and an in-shaft oil path (81) is arranged inside the rocker shaft (8) along the radial direction of the rocker shaft so as to be communicated with the rotary hole (83).
4. The engine brake oil passage control device according to claim 3, characterized in that: the arc of the arc-shaped hole (82) ranges from 45 degrees to 120 degrees.
5. The engine brake oil passage control device according to claim 3, characterized in that: the length of the in-shaft oil passage (81) is equal to the radius of the rocker shaft (8).
6. The engine brake oil passage control device according to claim 1 or 2, characterized in that: the middle part of the control spring seat (74) is provided with a communicated spring mounting groove (76) and a T-shaped control oil discharging hole (75) from top to bottom, the bottom end of the control spring (73) is embedded in the spring mounting groove (76), the bottom of the spring mounting groove (76) is communicated with a small-diameter end (751) of the control oil discharging hole (75), and a large-diameter end (752) of the control oil discharging hole (75) is communicated with the bottom surface of the control spring seat (74).
7. The engine brake oil passage control device according to claim 1 or 2, characterized in that: the outer wall of the control spring seat (74) is in threaded connection with the inner wall of the control chamber (71).
8. A method of using the engine brake oil passage control device according to claim 1, characterized in that: the using method comprises a non-braking working condition operation process, wherein the non-braking working condition operation process sequentially comprises the following steps of:
under the non-braking working condition, the pressure of the engine oil entering the braking oil way (5) through the rocker shaft (8) is smaller than the spring force of the control spring (73), the engine oil entering the longitudinal oil way (52) cannot compress the control spring (73), the control spring (73) is in an extending state, and at the moment, the engine oil entering the braking oil way (5) sequentially passes through the inclined oil way (51), the braking oil cavity (13), the oil discharging way (6) and the control chamber (71) and finally flows out from the control oil discharging hole (75).
9. The method for using an engine brake oil passage control device according to claim 8, characterized in that:
the using method further comprises a braking working condition operation process, and the braking working condition operation process sequentially comprises the following steps:
Under a braking working condition, the pressure of the engine oil entering the brake oil channel (5) through the rocker shaft (8) is larger than the spring force of the control spring (73), the engine oil entering the longitudinal oil channel (52) continuously compresses the control spring (73) until the descending control piston (72) blocks the oil discharging channel (6) so that the engine oil in the oil discharging channel (6) does not enter the control chamber (71), at the moment, the engine oil flowing into the brake oil channel (13) from the oblique oil channel (51) does not flow out through the oil discharging channel (6), the brake oil channel (13) forms a closed cavity, and along with the continuous entering of the engine oil, the ball socket (152) in the elephant foot (15) is subjected to a reaction force due to the movement of the rocker arm (4) and the rocker arm roller (41), the reaction force acts on the brake oil channel (13) through the elephant foot (15) and the brake piston (14), the oil pressure in the brake oil cavity is continuously increased until the brake oil cavity (13) forms a high-pressure oil cavity, the oblique oil channel (51) is blocked, and no more engine oil enters the brake oil cavity (13), and at the moment, the brake is started; then, if the braking is required to be closed, the pressure of the engine oil entering the braking oil way (5) through the rocker shaft (8) is only required to be reduced until the engine oil pressure is smaller than the spring force of the control spring (73), the control piston (72) moves upwards under the rebound force of the control spring (73) until the oil discharging way (6) and the control chamber (71) are conducted, and at the moment, the engine oil in the braking oil chamber (13) flows out through the oil discharging way (6), the control chamber (71) and the control oil discharging hole (75) in sequence, and the braking is released.
10. The method of using an engine brake oil path control device according to claim 9, wherein:
the brake actuating mechanism (1) comprises a brake chamber (9), an adjusting bolt (2), a ball valve (10), a ball valve spring (11), a ball valve spring seat (3), a brake spring (12), a brake oil cavity (13), a brake piston (14) and a elephant foot (15), wherein the bottom end of the adjusting bolt (2) is positioned in the brake chamber (9), the top end of the adjusting bolt (2) sequentially penetrates through the brake chamber (9) and a rocker arm (4) and is fixedly connected with the outer wall of the rocker arm (4), a corresponding side oil hole (21) and a corresponding bottom oil hole (22) are respectively formed in the side surface and the bottom surface of the bottom end of the adjusting bolt (2), the high port of an oblique oil channel (51) is communicated with the bottom oil hole (22) after passing through the side oil hole (21), the ball valve (10) is arranged right below the bottom oil hole (22), the ball valve spring (11) is right arranged right below the ball valve spring (10), the bottom end of the ball valve spring (11) is communicated with a bottom hole (31) at the bottom of the ball valve spring seat (3), the ball valve (3) is contained with the ball valve (10) and the ball valve spring (11), the outside of the ball valve (3) is sleeved with the ball valve, the outside of the ball valve seat (3) and the ball valve seat is sleeved with the brake oil cavity (12), the outer wall of the brake piston (14) moves up and down along the inner wall of the brake chamber (9) in the brake oil chamber (13), a brake oil discharging hole (16) is formed in the side wall of the brake oil chamber (13) and positioned between the brake piston (14) and the ball valve spring seat (3) so as to be communicated with the oil discharging path (6), and the part, positioned below the brake chamber (9), on the bottom of the brake piston (14) is connected with the elephant foot (15);
The engine oil flowing into the brake oil cavity (13) from the oblique oil path (51) does not flow out from the oil unloading path (6), and the formation of the brake oil cavity (13) into a closed cavity means that: the engine oil in the inclined oil way (51) sequentially enters the ball valve spring seat (3) through the side oil hole (21) and the bottom oil hole (22) and presses down the ball valve (10), meanwhile, the engine oil entering the ball valve spring seat (3) flows into the brake piston (14) through the spring seat bottom hole (31) and gradually fills the brake oil cavity (13), and then flows into the oil discharging way (6) through the brake oil discharging hole (16), and the engine oil in the brake oil cavity (13) continuously enters and cannot flow out due to the fact that the oil discharging way (6) is not conducted with the control chamber (71), so that the brake oil cavity (13) forms a closed cavity;
the oil pressure in the brake oil cavity (13) is continuously increased until the brake oil cavity (13) forms a high-pressure oil cavity, and the inclined oil path (51) is blocked, which means that: the reaction force acting on the brake oil cavity (13) can increase the oil pressure in the brake oil cavity (13), the increased oil pressure can compress the ball valve spring (11) from bottom to top, the ball valve spring (11) under stress pushes up the ball valve (10) to enable the ball valve (10) to ascend until the ball valve (10) blocks the oil hole (22) on the bottom surface, so that engine oil in the inclined oil way (51) is not fed any more, the inclined oil way (51) is blocked, and no engine oil enters the brake oil cavity (13).
CN201710261285.8A 2017-04-20 2017-04-20 Engine brake oil way control device and application method thereof Active CN107035460B (en)

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CN110284937A (en) * 2019-07-19 2019-09-27 浙江康和机械科技有限公司 A kind of hydraulic auxiliary braking rocker structure directly driven
CN110486114B (en) * 2019-08-26 2020-10-02 东风商用车有限公司 Integrated engine brake execution piston
CN110541761B (en) * 2019-09-30 2024-04-05 江苏卓联精密机械有限公司 Engine brake hydraulic control device capable of filling oil quickly
CN110541762B (en) * 2019-09-30 2024-04-02 江苏卓联精密机械有限公司 Engine brake control device with multiple driving sources
CN112065525B (en) * 2020-09-09 2021-11-19 潍柴动力股份有限公司 Rocker arm mechanism and engine assembly
CN112065527B (en) * 2020-09-11 2021-11-19 潍柴动力股份有限公司 Control oil way structure, rocker shaft assembly and engine assembly

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US9376941B2 (en) * 2011-02-15 2016-06-28 Shanghai Universoon Autoparts Co., Ltd. Method and apparatus for resetting valve lift for use in engine brake
CN102787919B (en) * 2011-05-18 2015-03-04 上海尤顺汽车部件有限公司 Method and device for braking reset rocking arm
CN202300561U (en) * 2011-11-09 2012-07-04 中国第一汽车股份有限公司 Integrated type engine brake device
CN104500164B (en) * 2015-01-03 2017-01-11 浙江康和机械科技有限公司 Integrated engine brake rocker arm structure
CN206801638U (en) * 2017-04-20 2017-12-26 东风商用车有限公司 A kind of engine braking oil path control device

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