CN102003237B - Engine braking improving device - Google Patents
Engine braking improving device Download PDFInfo
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- CN102003237B CN102003237B CN 200910194858 CN200910194858A CN102003237B CN 102003237 B CN102003237 B CN 102003237B CN 200910194858 CN200910194858 CN 200910194858 CN 200910194858 A CN200910194858 A CN 200910194858A CN 102003237 B CN102003237 B CN 102003237B
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- valve
- blind hole
- braking
- spool
- rocking arm
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Abstract
The invention discloses an engine braking improving device, which consists of an exhaust valve control mechanism that is composed of a driving force input wheel, a cam wheel driven wheel, a rocker and a rockshaft, wherein the driving force input wheel is arranged outside the cam wheel driven wheel; the other end of the rocker is provided with a horizontal driving piston, a vertical valve play regulating piston and a vertical braking plunger; a connecting rod of which the two ends have convex spherical surfaces is arranged between the driving piston and the braking plunger; the convex spherical surface of the upper end of the connecting rod is fit with the concave spherical surface of the driving piston; the convex spherical surface of the lower end of the connecting rod is fit with the concave spherical surface of the braking plunger; and a valve rod connecting piece of the exhaust valve is arranged below the braking plunger. The driving force input wheel transfers the engine power to the rocker periodically, the switching between a braking mode and a normal operation mode can be realized by using the gap between an electromagnetic valve control rocker and the valve rod connecting piece of the exhaust valve, the volume and weight of a brake are reduced, and high oil pressure and the leakage, deform and load fluctuation which are caused by the high oil pressure are avoided.
Description
Technical field:
The present invention relates to mechanical field, relate in particular to the modifying device of the braking device of motor, particularly a kind of engine braking.
Background technique:
In prior art, internal-combustion engine is behaved as the method for brake tool know altogether, only need motor temporarily is converted to compressor.Fuel oil is cut off in this conversion, open outlet valve when the engine piston compression stroke finishes or when approach finishing, allow compressed gas (being air during braking) to be released, the motor energy that pressurized gas absorbs in compression stroke, can not turn back to engine piston at expansion stroke subsequently, but dissipate by 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 to be disclosed by the U.S. Patent number 3220392 that comings (Cummins) provides, and is commercially very successful according to the engine braking system of this patent manufacturing.But, this type of engine braking system is the annex of overhead on motor.For this type of engine brake is installed, to add packing ring between cylinder and valve gap, therefore, increased extraly height, weight and the cost of motor.Above-mentioned these problems are due to an annex engine braking system being used as motor, rather than constituent element of motor or integrated part cause.
Engine brake of the prior art is delivered to the machinery input outlet valve that will open through oil hydraulic circuit.Be usually included in reciprocating main piston in master piston bore on 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 oil hydraulic circuit, make its to-and-fro motion in slave piston bore, sub-piston acts on 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 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 to make for a long time enlarged bore piston stretch out or retract, and causes that braking system inertia is large, reaction is slow.
Summary of the invention:
The object of the present invention is to provide a kind of modifying device of engine braking, the overhead mode that the modifying device of described this engine braking will solve engine braking system in prior art has increased the height of motor and the technical problem of manufacture cost, will solve simultaneously the technical problem that braking system inertia is large, reaction is slow that hydraulically powered engine brake exists.
the modifying device of this engine braking of the present invention 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 consist of, the middle part of described rocking arm is arranged on pitman arm shaft, described driving force input cam mechanism is arranged on an end of rocking arm, the other end of rocking arm is provided with a vertical blind hole, described vertical blind hole lower end is provided with sleeve, be provided with spool in described sleeve, described spool upper end is provided with axial blind hole, described axial blind hole outlet port left surface is to be tilted to outer inclined-plane, described vertical blind hole middle part is provided with driven plunger, end in contact on described driven plunger downside and described sleeve, described driven plunger middle and lower part radially is provided with another blind hole along it, the right flank of described another blind hole is to be tilted to another outer inclined-plane, be provided with connecting rod between described driven plunger and spool, described vertical blind hole top is provided with the valve clearance regulating piston.
Further, be provided with vertically the fluid passage in described pitman arm shaft, be provided with radial hole along radial direction, be provided with fluid passage in described rocking arm, an end of described fluid passage is communicated with described radial hole, and the other end is communicated with described vertical blind hole.
Further, the axial blind hole bottom surface of described spool is provided with concave spherical surface, the bottom surface of another blind hole at described driven plunger middle part is concave spherical surface in another, described connecting rod two ends are provided with protruding sphere, described connecting rod lower end coordinates with described concave spherical surface, and described small end coordinates with described another concave spherical surface.
Further, described valve clearance regulating piston lower end surface contacts with described driven plunger upper side, described rocking arm upper end is provided with braking valve clearance adjusting screw by tapped hole, described braking valve clearance adjusting screw is connected with a nut after passing an end of rocking arm, and described braking valve clearance adjusting screw lower end contacts with described valve clearance regulating piston upper-end surface.
Further, described spool lower end is fixed with an end of spring, and the described spring the other end is fixed on described rocking arm by screw.
Further, be provided with axial grooving in the middle part of described spool outer side wall, radially be fixed with straight pin along it in the middle part of described sleeve, described straight pin one end stretches in described grooving.
Further, be provided with another spring between described driven plunger right-hand member and described vertical blind hole right side wall.
Further, the diameter of described valve clearance regulating piston is less than the diameter of described vertical blind hole, described vertical blind hole top is provided with the discharge orifice that is communicated with described swing arm space outerpace, and described discharge orifice is communicated with described vertical blind hole inner space by described valve clearance regulating piston.
Further, described driving force input cam is provided with at least one convex portion on basic circle within it.
Further, described fluid passage is communicated with oil-feed port and oil drain out in a three-way magnetic valve.
Working principle of the present invention 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 air discharging valve bar link is arranged on the control valve rod of engine exhaust valve.When needing motor to be converted to engine braking from normal working, by a controller to three-way magnetic valve sending action signal.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 otch and fluid passage in pitman arm shaft fluid passage and radial hole, rocking arm, flow to braking drive organ, oil flows in the vertical blind hole of rocking arm.Oil pressure overcomes the load of driven plunger right-hand member spring, and driven plunger is pushed away to the right, and connecting rod becomes vertically, and spool moves downward under the connecting rod effect, and driving mechanism becomes operating position from off position.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 on the left side of horizontal hole under the effect of its right-hand member spring.Spool is got back to off position upwards moving under the effect of brake spring in vertical hole, separate with the motor normal operation.Vertically the discharge orifice at blind hole top, can avoid producing in vertical blind hole oil pressure.
The present invention and prior art compare, and its effect is actively with obvious.the present invention 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 outlet valve drive end, realize the switching of braking and engine work 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 oil temperature, the impact of oil pressure and air content, brake valve rises can obtain less value, reduce the requirement to engine piston and valve clearance.
Description of drawings:
Fig. 1 is the structural representation that the braking drive organ of the modifying device of a kind of engine braking of the present invention is in the off-position.
Fig. 2 is the schematic diagram that the braking drive organ in the modifying device of a kind of engine braking of the present invention is in " opening " position.
Fig. 3 is the schematic diagram of the working state of fluid passage in the modifying device of a kind of engine braking of the present invention and three-way magnetic valve.
Fig. 4 is the schematic diagram of another working state of fluid passage in the modifying device of a kind of engine braking of the present invention and three-way magnetic valve.
Embodiment:
Embodiment 1:
as Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, the modifying device 100 of a kind of engine braking of the present invention, consisted of by an outlet valve control mechanism 2002, wherein, described outlet valve control mechanism 2002 is by driving force input cam 2302, cam follower wheel 2352, rocking arm 2102 and pitman arm shaft 205 consist of, the middle part of described rocking arm 2102 is arranged on pitman arm shaft 205, described driving force input cam 2302 is arranged on outside cam follower wheel 2352, in driving force input cam 2302, the excircle of the rotation round of bump and cam follower wheel 2352 intersects, rocking arm 2102 arranged outside have a biasing Returnning spring 1982, be provided with fluid passage 214 in described rocking arm 2102, be provided with vertically fluid passage 211 in pitman arm shaft 205, be provided with a radial hole 212 along a radius, described radial hole 212 is communicated with 214 with described fluid passage, be provided with an otch 213 in rocking arm 210, described otch 213 is communicated with radial hole 212 and described fluid passage 214 1 ends respectively, the other end of rocking arm 2102 is provided with a vertical blind hole 260, described fluid passage 214 the other ends are communicated with described vertical blind hole 260 sidewalls, described vertical blind hole 260 lower ends flush with described rocking arm 2102 lower ends, described vertical blind hole lower end is provided with sleeve, described sleeve and described vertical blind hole drive fit, be provided with spool 160 in described sleeve, described spool 160 upper ends are provided with the axial blind hole that the bottom surface is interior concave spherical surface 128, described blind hole outlet port left surface is to be tilted to outer inclined-plane, described vertical blind hole 260 middle parts are provided with driven plunger 164, end in contact on described driven plunger 164 downsides and described sleeve, described driven plunger 164 middle and lower parts are provided with another blind hole, the bottom surface of described another blind hole is concave spherical surface 122 in another, the right flank of described another blind hole is to be tilted to another outer inclined-plane, be provided with the connecting rod 184 that two ends are protruding sphere between described concave spherical surface 128 and another concave spherical surface 122, described connecting rod 184 lower ends coordinate with described concave spherical surface 128, described connecting rod 184 upper ends coordinate with described another concave spherical surface 122, described vertical blind hole 260 tops are provided with valve clearance regulating piston 162, described valve clearance regulating piston 162 lower end surfaces contact with described driven plunger 164 upper sides, described rocking arm 2102 upper ends are provided with braking valve clearance adjusting screw 1102 by tapped hole, described braking valve clearance adjusting screw 1102 is connected with a nut 1052 after passing an end of rocking arm 2102, described braking valve clearance adjusting screw 1102 lower ends contact with described valve clearance regulating piston 162 upper-end surfaces, described spool 160 lower ends are fixed with an end of spring 177, described spring 177 the other ends are fixed on described rocking arm 2102 by screw 179, described spool 160 upper-end surfaces contact with described driven plunger 164 outer side surfaces, be provided with axial grooving 137 in the middle part of described spool 160 outer side walls, described sleeve middle part radially is fixed with straight pin 142 along it, described straight pin 142 1 ends stretch in described grooving 137, be provided with another spring 156 between described driven plunger 164 right-hand members and described vertical blind hole 260 right side walls, described driven plunger 164 left sides contact with the left surface in described vertical hole 260, and be right against described fluid passage 214 the other ends, as shown in Figure 1 this arrestment mechanism be in the off-position time, the other end opening of driven plunger 164 left side covering fluid passages 214.
Further, described another inclined-plane is parallel with described inclined-plane, and when control mechanism cut out draining, driven plunger 164 moved to left under spring 156 effects, the constraint that this moment, connecting rod 184 was subject to sphere 128 and another sphere 122 moves to left and is tilted to the left, and relies on inclined-plane and another inclined-plane.
Further, the diameter of described valve clearance regulating piston 162 is less than the diameter of described vertical blind hole 260, described vertical blind hole 260 tops are provided with the discharge orifice 168 that is communicated with described swing arm 2102 space outerpaces, and described discharge orifice 168 is communicated with described vertical blind hole 260 inner spaces by described valve clearance regulating piston 162.
Further, described driven plunger 164 outer ends are provided with axial blind hole, and described another spring 156 1 ends are arranged in described blind hole, and the other end of described another spring 156 is resisted against described vertical blind hole 260 sidewalls.
Further, described driving force input cam 2302 is provided with two convex portions 232,233 on basic circle 2252 within it.
Further, described fluid passage 211 is communicated with oil-feed port 111 and oil drain out 222 in a three-way magnetic valve 51.
The working procedure of the 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.Air discharging valve bar link 116 is arranged on the control valve rod 3001 of engine exhaust valve 300.When needing motor to be converted to engine braking from normal working, by a controller (not shown) to three-way magnetic valve 51 sending action signals.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 hydraulic fluid flow to braking drive organ 100 by the fluid passage 211 in pitman arm shaft 205 and radial hole 212, rocking arm 2102 interior otch 213 and hydraulic channels 214, oil flows in the vertical blind hole 260 of rocking arm 2102.Oil pressure overcomes the load of driven plunger 164 right-hand member springs 156, spool 160 is pushed away downwards, spool 160 is realized guiding by the grooving 137 of its sidewall with coordinating of 142 of pins, after spool 160 moves down, driven plunger 164 just can be under the oil pressure effect, the load that overcomes spring 156 moves right, and rests on spring seat 158.At this moment, the distance 132 of spool 160 lower ends and exhasut valve stem link 116 upper ends is eliminated, and the lower surface of spool 160 contacts with exhasut valve stem link 116, forms the solid link, and the driving mechanism of engine braking is in operating position shown in Figure 2.The motion that the small boss 232,233 of brake cam 2302 produces by brake rocker arm 2102, driven plunger 164, spool 160 and exhasut valve stem link 116, is delivered to outlet valve 300, produces 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 surface in vertical hole 260 under the effect of spring 156.Spool 160 is subjected to upwards to move in acting on of brake spring 177 vertical hole 260, gets back to off position shown in Figure 1, separates with the motor normal operation.
In the embodiment shown in fig. 1, also be provided with another outlet valve 300 in motor, be provided with in this outlet valve 300 and control valve rod 3002, control on valve rod and be provided with another valve spring 3102, valve spring 3101 and valve spring 3102 are arranged between engine cylinder cover 500 and valve bridge 400, and valve bridge 400 makes 300 interlocks of two outlet valves.Be provided with exhaust valve actuation device 200 on valve bridge 400, 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 large convex portion 220 on basic circle 225 within it, be arranged on exhaust valve rocker arm axle 2051 exhaust valve actuation rocking arm 210 swing types, one end of exhaust valve actuation rocking arm 210 is provided with cam follower wheel 235, and the other end of exhaust valve actuation rocking arm 210 contacts with valve bridge 400 tops.When this arrestment mechanism is in "open" state shown in Figure 2, because spool 160 stretches out downwards, the gap 132 of spool 160 lower ends and exhasut valve stem link 116 upper ends is eliminated, under the kick 232,233 of cam 2302 acts on, spool 160 is depressed exhasut valve stem link 116, realizes exhaust brake.
The present embodiment is that the present invention will be described, rather than is limited.In fact, those people that are expert at one's trade can show to change places and in scope of the present invention and principle, the present invention modified 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 present invention will comprise above-mentioned modification and change, as long as within they belong to appended claim or the scope suitable with requirement power.
Claims (8)
1. the modifying device of an engine braking, consisted of 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 consist of, the middle part of described rocking arm is arranged on pitman arm shaft, described driving force input cam mechanism is arranged on an end of rocking arm, the other end of rocking arm is provided with a vertical blind hole, described vertical blind hole lower end is provided with the valve clearance regulating piston, be provided with a horizontal through hole and another vertical blind hole in described valve clearance regulating piston, described another vertical blind hole upper end and described horizontal through hole intersect and are three-port structure, be provided with driven plunger in described horizontal through hole, be provided with spool in described another vertical blind hole, described driven plunger middle and lower part radially is provided with another blind hole along it, described spool upper end is provided with axial blind hole, be provided with connecting rod in the radial blind holes of described driven plunger and in the axial blind hole of spool.
2. the modifying device of a kind of engine braking as claimed in claim 1, it is characterized in that: be provided with vertically the fluid passage in described pitman arm shaft, be provided with radial hole along radial direction, be provided with fluid passage in described rocking arm, one end of described fluid passage is communicated with described radial hole, and the horizontal through hole in the other end and described valve clearance regulating piston is communicated with.
3. the modifying device of a kind of engine braking as claimed in claim 1, it is characterized in that: the axial blind hole bottom surface of described spool is provided with concave spherical surface, the bottom surface of the radial blind holes at described driven plunger middle part is concave spherical surface in another, described connecting rod two ends are provided with protruding sphere, described connecting rod lower end coordinates with described concave spherical surface, and described small end coordinates with described another concave spherical surface.
4. the modifying device of a kind of engine braking as claimed in claim 1, it is characterized in that: described rocking arm upper end is provided with braking valve clearance adjusting screw by tapped hole, described braking valve clearance adjusting screw is connected with a nut after passing an end of rocking arm, and described braking valve clearance adjusting screw lower end contacts with described valve clearance regulating piston upper-end surface.
5. the modifying device of a kind of engine braking as claimed in claim 1 is characterized in that: described spool lower end is fixed with an end of spring, and the described spring the other end is fixed on described rocking arm by screw.
6. the modifying device of a kind of engine braking as claimed in claim 1, it is characterized in that: be provided with axial grooving in the middle part of described spool outer side wall, described valve clearance regulating piston middle part radially is fixed with straight pin along it, and described straight pin one end stretches in described grooving.
7. the modifying device of a kind of engine braking as claimed in claim 1, it is characterized in that: described driving force input cam is provided with at least one convex portion on basic circle within it.
8. the modifying device of a kind of engine braking as claimed in claim 2, it is characterized in that: the fluid passage in described pitman arm shaft is connected with oil drain out with oil-feed port in a three-way magnetic valve by a spool, when described spool glided, the fluid passage in pitman arm shaft was communicated with described oil-feed port.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910194858 CN102003237B (en) | 2009-08-31 | 2009-08-31 | Engine braking improving device |
| KR1020117018023A KR101290440B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| PCT/US2009/069622 WO2010078280A2 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| EP11006451.6A EP2444602B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| RU2011132887/06A RU2479735C1 (en) | 2009-01-05 | 2009-12-28 | Device and methods for overrunning |
| BRPI0922516-1A BRPI0922516B1 (en) | 2009-01-05 | 2009-12-28 | APPARATUS TO CHANGE AN INTERNAL COMBUSTION ENGINE FROM A NORMAL ENGINE OPERATION FOR AN ENGINE BRAKING OPERATION AND METHOD FOR CONVERTING AN INTERNAL COMBUSTION ENGINE FROM A NORMAL ENGINE OPERATION TO AN ENGINE BRAKING OPERATION |
| EP11006452.4A EP2439381B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| EP09837091.9A EP2384396B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910194858 CN102003237B (en) | 2009-08-31 | 2009-08-31 | Engine braking improving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102003237A CN102003237A (en) | 2011-04-06 |
| CN102003237B true CN102003237B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910194858 Expired - Fee Related CN102003237B (en) | 2009-01-05 | 2009-08-31 | Engine braking improving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102003237B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840005B (en) * | 2011-06-24 | 2015-11-04 | 上海尤顺汽车部件有限公司 | A kind of solid chain type composite rocker arm brake device |
| JP2015534005A (en) * | 2012-11-05 | 2015-11-26 | イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ | Development of switching roller finger follower for cylinder deactivation in internal combustion engines |
| CN203669955U (en) * | 2013-10-15 | 2014-06-25 | 上海尤顺汽车部件有限公司 | Device optimizing low-speed performance of internal combustion engine and device starting internal combustion engine |
| CN109372608B (en) * | 2018-11-27 | 2024-03-01 | 浙江黎明智造股份有限公司 | Electromagnetic control type engine braking device |
| CN111894696B (en) * | 2020-07-06 | 2021-08-31 | 一汽解放汽车有限公司 | Valve locking mechanism for engine cylinder deactivation and vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6189504B1 (en) * | 1997-11-24 | 2001-02-20 | Diesel Engine Retarders, Inc. | System for combination compression release braking and exhaust gas recirculation |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN201581950U (en) * | 2009-08-31 | 2010-09-15 | 上海尤顺汽车部件有限公司 | Modified engine brake device |
-
2009
- 2009-08-31 CN CN 200910194858 patent/CN102003237B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6189504B1 (en) * | 1997-11-24 | 2001-02-20 | Diesel Engine Retarders, Inc. | System for combination compression release braking and exhaust gas recirculation |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN201581950U (en) * | 2009-08-31 | 2010-09-15 | 上海尤顺汽车部件有限公司 | Modified engine brake device |
Also Published As
| Publication number | Publication date |
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| CN102003237A (en) | 2011-04-06 |
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