CN201513209U - Engine braking device with low manufacturing cost - Google Patents
Engine braking device with low manufacturing cost Download PDFInfo
- Publication number
- CN201513209U CN201513209U CN 200920208704 CN200920208704U CN201513209U CN 201513209 U CN201513209 U CN 201513209U CN 200920208704 CN200920208704 CN 200920208704 CN 200920208704 U CN200920208704 U CN 200920208704U CN 201513209 U CN201513209 U CN 201513209U
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- engine braking
- rocking arm
- spool
- hole
- manufacture
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Abstract
The utility model relates to an engine braking device with low manufacturing cost, which consists of an exhaust valve control mechanism, wherein the exhaust valve control mechanism consists of a driving force input cam, a cam driven wheel, a push rod, a rocker arm and a rocker arm shaft, one end of the push rod is connected with one end of the rocker arm, the cam driven wheel is arranged at the other end of the push rod, the driving force input cam is arranged outside of the cam driven wheel, a horizontal driving piston and a vertical braking piston plunger are arranged at the other end of the rocker arm, an annular groove is formed in the middle of the driving piston, the side surface of the annular groove and that of the driving piston on the left side thereof which serve as the non-operating surface and the operating surface are in close contact with the upper end surface of the braking piston plunger by pressing, and an exhaust valve rod connecting piece is arranged below the braking piston plunger. The driving force cam transmits the engine power periodically to the rocker arm, and utilizes a solenoid valve to control the gap between the rocker arm ad the exhaust valve rod connecting piece, thereby realizing the switching between braking state and normal working state, reducing the size and weight of braker, enabling high pressure oil to be unnecessary, and eliminating leakage, deformation and load fluctuation caused by the high pressure oil.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to the engine braking apparatus of the braking device of motor, particularly a kind of low cost of manufacture.
Background technique:
In the prior art, internal-combustion engine is known altogether as the method behaviour of brake tool, only needed motor temporarily is converted to compressor.Fuel oil is cut off in this conversion, when the engine piston compression stroke finishes or when finishing, open outlet valve, allowing to be compressed gas (being air during braking) is released, the motor energy that pressurized gas absorbed in compression stroke, can not turn back to engine piston at expansion stroke subsequently, but dissipate by the exhaust and the radiation system of motor.Final result is effective engine braking, slows down the speed of vehicle.
A precedent of engine brake is that the U.S. Patent number 3220392 that is provided by comings (Cummins) discloses, according to the engine braking system of this patent manufacturing commercial very successful.But, this type of engine braking system is the annex of overhead on motor.For this type of engine brake is installed, between cylinder and valve gap, to add packing ring, therefore, increased height, weight and the cost of motor extraly.Above-mentioned these problems are because engine braking system is used as an annex of motor, rather than of motor constituent element or integrated part caused.
Engine brake of the prior art is delivered to the outlet valve that will open through oil hydraulic circuit with the machinery input.Be usually included in reciprocating main piston in the master piston bore on the oil hydraulic circuit, this to-and-fro motion comes from the machinery input of motor, such as the shaking of oil sprayer rocking arm, the hydraulic fluid that moves through of main piston is delivered to sub-piston on the oil hydraulic circuit, make its to-and-fro motion in slave piston bore, sub-piston acts on the outlet valve directly or indirectly, produces the valve actuation of engine braking running.
Therefore, above-mentionedly there is another shortcoming by hydraulically powered conventional engines break, be the contractibility or the distortion of hydraulic system, this flexibility with liquid is relevant, a large amount of compressions that high flexibility causes brake valve to rise reduce, valve rises reduces the increase that causes valve to carry, and the increase that valve carries causes higher flexibility, causes a kind of vicious circle.In addition, the valve liter that is caused by hydraulic pressure distortion reduces to increase along with the increase of engine speed, and to rise trend on the contrary with the desired brake valve of engine braking performance.In order to reduce flexible hydraulic, must use large diameter hydraulic piston, increase volume and weight.And oily stream need make enlarged bore piston stretch out for a long time or withdraw, and causes that braking system inertia is big, reaction is slow.
Summary of the invention:
The purpose of this utility model is to provide a kind of engine braking apparatus of low cost of manufacture, the overhead mode that the engine braking apparatus of described this low cost of manufacture will solve engine braking system in the prior art has increased the height of motor and the technical problem of manufacture cost, will solve the technical problem that braking system inertia is big, reaction is slow that hydraulically powered engine brake exists simultaneously.
The engine braking apparatus of this low cost of manufacture of the present utility model is made of an outlet valve control mechanism, wherein, described outlet valve control mechanism is by the driving force input cam; rocking arm and pitman arm shaft constitute; rocking arm one end is provided with a vertical hole and a horizontal hole; upper end, described vertical hole is intersected with described horizontal hole and is three-port structure; be provided with spool in the described vertical hole; be provided with driven plunger in the described horizontal hole; described driven plunger middle part is provided with one along its groove that radially extends; the bottom surface of described groove constitutes a step by two planes; be provided with liquid sealing between described spool outer side surface and the described vertical hole and be connected; the width of described groove is greater than the width on the spool; described spool upper-end surface contacts with the bottom surface of described groove; be provided with liquid sealing between the outer side surface of described drive plunger outer end and the described horizontal hole and be connected; described driving force input cam mechanism is arranged on the other end of rocking arm, and rocking arm is arranged on the pitman arm shaft.
Further, be provided with the fluid passage in the described pitman arm shaft vertically, be provided with radial hole along radial direction, be provided with fluid passage in the described rocking arm, an end of described fluid passage is communicated with described radial hole, and the other end is communicated with described horizontal hole.
Further, the outer side wall lower end of described driven plunger the inner is provided with along its axial grooving, and described grooving is connected with the space of described groove, and the fluid passage in the described rocking arm is connected by described axial grooving and described groove.
Further, described spool lower end is fixed with an end of spring, the described spring the other end by screw on described rocking arm.Described spool can only be slided up and down in described vertical hole by described spring positioning and guiding, can not rotate.
Further, be fixed with a spring seat that is ring in described horizontal hole outer end by snap ring, be provided with another spring between described driven plunger outer end and the described spring seat, described driven plunger outer end is provided with axial blind hole, described another spring one end is arranged in the described blind hole, and the other end of described another spring is connected with described spring seat.
Further, the diameter of described spool upper end is less than the diameter of its underpart, and the width of described groove is greater than the diameter of described spool upper end small column.
Further, described horizontal hole outer end and described rocking arm end face, lower end, described vertical hole flushes with described rocking arm lower end,
Further, the groove in the middle part of the described driven plunger is a Spielpassung between the small column of width direction and described spool upper end.
Further, described driving force input cam within it basic circle be provided with at least one convex portion.
Further, described fluid passage is communicated with oil-feed port and oil drain out in the three-way magnetic valve.
Working principle of the present utility model is: the driving force input cam is connected with the power take-off mechanism of motor, and the driving force input cam makes rocker arms roll under the motivational drive of motor.The outlet valve valve stem coupling member is arranged on the control valve rod of engine exhaust valve.Need motor when normal working is converted to engine braking, send actuating signal to three-way magnetic valve by a controller.Three-way magnetic valve is by open-minded by the electric current of its positive terminal and negative terminal, the spool of solenoid valve glides, open oil-feed port, machine oil is by the brake fluid networking, comprise the fluid passage in the brake rocker arm, flow to braking drive organ, the overdrive grooving of piston the inner of oil circulation enters in the horizontal hole of rocking arm.Bottom surface, the right of driven plunger middle part axial groove is as the not operation face, and bottom surface, its left side is a fore side.Oil pressure overcomes the load of driven plunger right-hand member spring, and spool is pushed away downwards.Spool is realized guiding by the small column of its upper end and the Spielpassung of driven plunger intermediate channel, and after spool moved down, driven plunger just can be under the oil pressure effect, and the load that overcomes spring moves right, and rests on the spring seat.At this moment, the upper surface of spool contacts with the operating surface of driven plunger, forms the solid link, and the driving mechanism of engine braking is in operating position.The small boss of brake cam and the motion that is produced by brake rocker arm, driven plunger, spool and exhasut valve stem link, are delivered to outlet valve, produce engine braking.When not needing engine braking, the engine braking control mechanism cuts out draining, and driven plunger is not subjected to oil pressure, to moving to left, rests in the left end of horizontal hole under the effect of spring.Spool is subjected to upwards to move in the vertical hole of acting on of brake spring, gets back to off position, separates with the motor normal operation.
The utility model and prior art compare, and its effect is actively with tangible.The utility model utilizes cam that the power of motor periodically is delivered to rocking arm, utilize the exhaust action of rocking arm operations platoon air valve, utilize the gap between electromagnetic valve rocking arm and the outlet valve drive end, realize the switching of braking and motor proper functioning two states and keep, can be integrated with motor, thereby reduce the volume and weight of engine brake, need not adopt the hydraulic braking control valve, reduced cost, reduced reaction time, the leakage that does not have high oil pressure and high oil pressure to cause, distortion and load fluctuation, brake valve rises and is not subjected to the oil temperature, the influence of oil pressure and air content, brake valve rises can obtain littler value, reduces the requirement to engine piston and valve clearance.
Description of drawings:
Fig. 1 is the structural representation (do not draw among Fig. 1 spool and driven plunger part) of the engine braking apparatus of low cost of manufacture of the present utility model.
Fig. 2 is the schematic representation that the braking drive organ in the engine braking apparatus of low cost of manufacture of the present utility model is in the off-position.
Fig. 3 is the schematic representation of the working state of fluid passage in the engine braking apparatus of low cost of manufacture of the present utility model and three-way magnetic valve.
Fig. 4 is the schematic representation of another working state of fluid passage in the engine braking apparatus of low cost of manufacture of the present utility model and three-way magnetic valve.
Embodiment:
Embodiment 1:
Such as Fig. 1; Fig. 2; Fig. 3 and shown in Figure 4; The engine braking apparatus 100 of low cost of manufacture of the present utility model; Consisted of by an air bleeding valve controlling organization 2002; Wherein, Described air bleeding valve controlling organization 2002 is by driving force input cam 2302; Cam follower wheel 2352; Push rod 2012; Rocking arm 2102 and rocker arm shaft 205 consist of; The middle part of described rocking arm 2102 is arranged on the rocker arm shaft 205; One end of described push rod 2012 is connected with an end of rocking arm 2102; Described cam follower wheel 2352 is arranged in the other end of push rod 2012; Described driving force input cam 2302 is arranged on outside the cam follower wheel 2352; Protuberance 232 in the driving force input cam 2302; The excircle of 233 rotation round and cam follower wheel 2352 intersects; Rocking arm 2102 arranged outside have a biasing back-moving spring 1982; Be provided with fluid passage 214 in the described rocking arm 2102; The other end of rocking arm 2102 is provided with a vertical hole 190 and a lateral aperture 166; Described lateral aperture 166 outer ends and described rocking arm 2102 end face; 190 lower ends, described vertical hole flush with described rocking arm lower end; 190 upper ends, described vertical hole and described lateral aperture 166 intersect and are three-port structure; Be provided with spool 160 in the described vertical hole 190; Spool 160 lower ends and exhasut valve stem connector 116 upper ends over against; The diameter of described spool 160 upper ends is less than the diameter of its underpart; Be provided with driven plunger 164 in the described lateral aperture 166; Described driven plunger 164 middle parts are provided with one along its groove that radially extends 137; The bottom surface of described groove 137 is by two planes 145; 140 consist of; Described two planes 145; 140 consist of a step; The step surface 145 in the right of described groove 137 is than step surface 140 height in the left side; The not operation face 145 that step surface 145 is this controlling organization in the right; The step surface in the left side is operating surface 140; The width of described groove 137 is greater than the diameter of described spool 160 upper end small columns; Being provided with liquid sealing between described spool 160 lateral surfaces and the described vertical hole 190 is connected; Described spool 160 lower ends are fixed with an end of spring 177; Described spring 177 other ends are fixed on the described rocking arm 2102 by screw 179; Step surfaces in described spool 160 upper surfaces and described the right (not operation face) 145 contact; The lateral wall lower end of described driven plunger 164 the inners is provided with along its axial grooving 196; Described grooving 196 is connected with the space of described groove 137; Fluid passage 214 in the described rocking arm is connected by described axial grooving 196 and described groove 137; Be fixed with a spring base 158 that is annular in described lateral aperture 166 outer ends by snap ring 157; Be provided with another spring 156 between described driven plunger 164 outer ends and the described spring base 158; Being provided with liquid sealing between the small column contacts side surfaces of the right flank of described groove 137 and described spool 160 upper ends, the lateral surface of described actuation plunger 160 outer ends and described lateral aperture 166 is connected.
Further, the groove 137 in the middle part of the described driven plunger is a Spielpassung between the small column of width direction and described spool 160 upper ends.
Further, described driven plunger 164 outer ends are provided with axial blind hole, and described another spring 156 1 ends are arranged in the described blind hole, and the other end of described another spring 156 is connected with described spring seat 158.
Further, be provided with braking valve clearance adjusting screw 1102 between described push rod 2012 and the rocking arm 2102, described braking valve clearance adjusting screw 1102 is connected with push rod 2012, and braking valve clearance adjusting screw 1102 is connected with a nut 1052 after passing an end of rocking arm 2102.
Further, described driving force input cam 2302 within it basic circle 2252 be provided with a lug boss 232 and a lug boss 233.
Further, described fluid passage 211 is communicated with oil-feed port 111 and oil drain out 222 in the three-way magnetic valve 51.
The working procedure of present embodiment is: driving force input cam 2302 is connected with the power take-off mechanism (not shown) of motor, and driving force input cam 2302 shakes rocking arm 2102 under the motivational drive of motor.Outlet valve valve stem coupling member 116 is arranged on the control valve rod 3001 of engine exhaust valve 300.Need motor when normal working is converted to engine braking, send actuating signals to three-way magnetic valve 51 by a controller (not shown).Three-way magnetic valve 51 is by open-minded by the electric current of its positive terminal 55 and negative terminal 57, the spool 58 of solenoid valve glides, open oil-feed port 111, allow in the horizontal hole 166 that hydraulic fluid enters into rocking arm by otch 213 in the fluid passage 211 in the pitman arm shaft 205 and radial hole 212, the rocking arm 2102 and hydraulic channel 214, flow to braking drive organ 100, the overdrive grooving 196 of piston 164 the inners of oil circulation enters in the horizontal hole 166 of rocking arm.Bottom surface, the right of driven plunger 164 middle part axial grooves 137 is as not operation face 145, and bottom surface, its left side is a fore side 140.Oil pressure overcomes the load of driven plunger right-hand member spring 156, and spool 160 is pushed away downwards, and its stroke is equal to or slightly greater than the distance 130 between not operation face 145 and the fore side 140.Spool 160 is realized guiding by the small column of its upper end and the Spielpassung of driven plunger intermediate channel 137, after spool 160 moves down, driven plunger 164 just can be under the oil pressure effect, and the load that overcomes spring 156 moves right, and rests on the spring seat 158.At this moment, the upper surface of spool 160 contacts with the operating surface of driven plunger 140, forms the solid link, and the driving mechanism of engine braking is in operating position.Small boss 232,233 motions that produced of brake cam 2302 by brake rocker arm 2102, driven plunger 164, spool 160 and exhasut valve stem link 116, are delivered to outlet valve 300, produce engine braking.When not needing engine braking, the engine braking control mechanism cuts out draining, and driven plunger 164 is not subjected to oil pressure, to moving to left, rests in the left end of horizontal hole 166 under the effect of spring 156.Spool 160 is subjected to upwards to move in the vertical hole 190 of acting on of brake spring 177, gets back to off position, separates with the motor normal operation.
In the embodiment shown in fig. 1, also be provided with another outlet valve 300 in the motor, be provided with control valve rod 3002 in this outlet valve 300, the control valve rod is provided with another valve spring 3102, valve spring 3101 and valve spring 3102 are arranged between engine cylinder cover 500 and the valve bridge 400, and valve bridge 400 makes 300 interlocks of two outlet valves.Valve bridge 400 is provided with exhaust valve actuation device 200, and exhaust valve actuation device 200 is made of exhaust valve actuation cam 230, exhaust valve actuation rocking arm 210 and valve bridge 400.Exhaust-valve cam 230 has a big convex portion 220 on the basic circle 225 within it, is installed on the exhaust valve rocker arm axle 2051 exhaust valve actuation rocking arm 210 swing types, and an end of exhaust valve actuation rocking arm 210 is provided with cam follower wheel 235.
Present embodiment is that the utility model is described, rather than limits it.In fact, those people that are expert at one's trade can show to change places and in scope of the present utility model and principle the utility model made amendment and change.For instance, illustrated or certain part of functions described of concrete mechanism can be used for another concrete mechanism, and then obtains a new mechanism.Therefore, the utility model will comprise above-mentioned modification and change, as long as they belong within appended claim or the scope suitable with requirement power.
Claims (7)
1. the engine braking apparatus of a low cost of manufacture, constitute by an outlet valve control mechanism, it is characterized in that: described outlet valve control mechanism is by the driving force input cam; rocking arm and pitman arm shaft constitute; rocking arm one end is provided with a vertical hole and a horizontal hole; upper end, described vertical hole is intersected with described horizontal hole and is three-port structure; be provided with spool in the described vertical hole; be provided with driven plunger in the described horizontal hole; described driven plunger middle part is provided with one along its groove that radially extends; the bottom surface of described groove constitutes a step by two planes; be provided with liquid sealing between described spool outer side surface and the described vertical hole and be connected; the width of described groove is greater than the width on the spool; described spool upper-end surface contacts with the bottom surface of described groove; be provided with liquid sealing between the outer side surface of described drive plunger outer end and the described horizontal hole and be connected; described driving force input cam mechanism is arranged on the other end of rocking arm, and rocking arm is arranged on the pitman arm shaft.
2. the engine braking apparatus of low cost of manufacture as claimed in claim 1, it is characterized in that: be provided with the fluid passage in the described pitman arm shaft vertically, be provided with radial hole along radial direction, be provided with fluid passage in the described rocking arm, one end of described fluid passage is communicated with described radial hole, and the other end is communicated with described horizontal hole.
3. the engine braking apparatus of low cost of manufacture as claimed in claim 1, it is characterized in that: the outer side wall lower end of described driven plunger the inner is provided with along its axial grooving, described grooving is connected with the space of described radial groove, and the fluid passage in the described rocking arm is connected by described axial grooving and described radial groove.
4. the engine braking apparatus of low cost of manufacture as claimed in claim 1, it is characterized in that: described spool lower end is fixed with an end of spring, the described spring the other end by screw on described rocking arm.
5. the engine braking apparatus of low cost of manufacture as claimed in claim 1, it is characterized in that: be fixed with a spring seat that is ring by snap ring in described horizontal hole outer end, be provided with another spring between described driven plunger outer end and the described spring seat, described driven plunger outer end is provided with axial blind hole, described another spring one end is arranged in the described blind hole, and the other end of described another spring is connected with described spring seat.
6. the engine braking apparatus of low cost of manufacture as claimed in claim 1, it is characterized in that: described driving force input cam basic circle within it is provided with at least one convex portion.
7. the engine braking apparatus of low cost of manufacture as claimed in claim 1 is characterized in that: described fluid passage is communicated with oil-feed port and oil drain out in the three-way magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920208704 CN201513209U (en) | 2009-08-31 | 2009-08-31 | Engine braking device with low manufacturing cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920208704 CN201513209U (en) | 2009-08-31 | 2009-08-31 | Engine braking device with low manufacturing cost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201513209U true CN201513209U (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920208704 Expired - Lifetime CN201513209U (en) | 2009-08-31 | 2009-08-31 | Engine braking device with low manufacturing cost |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201513209U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100170472A1 (en) * | 2009-01-05 | 2010-07-08 | Zhou Yang | Integrated engine brake with mechanical linkage |
| CN102635417A (en) * | 2011-02-15 | 2012-08-15 | 奚勇 | Hybrid type braking method and device for generating engine braking |
| CN102003236B (en) * | 2009-08-31 | 2012-08-22 | 上海尤顺汽车部件有限公司 | Engine brake device with lower manufacture cost |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN106640258A (en) * | 2016-12-28 | 2017-05-10 | 潍柴动力股份有限公司 | Engine compression release type braking system and engine |
| CN110131011A (en) * | 2019-05-29 | 2019-08-16 | 潍柴动力股份有限公司 | A kind of engine braking apparatus and engine |
| CN116085087A (en) * | 2023-03-08 | 2023-05-09 | 龙口中宇热管理***科技有限公司 | In-cylinder braking mechanism and method for engine |
-
2009
- 2009-08-31 CN CN 200920208704 patent/CN201513209U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100170472A1 (en) * | 2009-01-05 | 2010-07-08 | Zhou Yang | Integrated engine brake with mechanical linkage |
| CN102003236B (en) * | 2009-08-31 | 2012-08-22 | 上海尤顺汽车部件有限公司 | Engine brake device with lower manufacture cost |
| CN102635417A (en) * | 2011-02-15 | 2012-08-15 | 奚勇 | Hybrid type braking method and device for generating engine braking |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN104481628B (en) * | 2014-12-25 | 2017-02-22 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN106640258A (en) * | 2016-12-28 | 2017-05-10 | 潍柴动力股份有限公司 | Engine compression release type braking system and engine |
| CN106640258B (en) * | 2016-12-28 | 2019-05-28 | 潍柴动力股份有限公司 | A kind of engine compresses release type braking system and engine |
| CN110131011A (en) * | 2019-05-29 | 2019-08-16 | 潍柴动力股份有限公司 | A kind of engine braking apparatus and engine |
| CN116085087A (en) * | 2023-03-08 | 2023-05-09 | 龙口中宇热管理***科技有限公司 | In-cylinder braking mechanism and method for engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100623 Effective date of abandoning: 20090831 |