CN102191965B - Driving device of engine brake - Google Patents
Driving device of engine brake Download PDFInfo
- Publication number
- CN102191965B CN102191965B CN201110041875.2A CN201110041875A CN102191965B CN 102191965 B CN102191965 B CN 102191965B CN 201110041875 A CN201110041875 A CN 201110041875A CN 102191965 B CN102191965 B CN 102191965B
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- Prior art keywords
- blind hole
- connecting rod
- brake
- braking
- driven plunger
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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
- F01L2820/00—Details on specific features characterising valve gear arrangements
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- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention provides a driving device of an engine brake. The driving device comprises a braking box body, connecting rods, a driving piston and a braking plunger, wherein a vertical blind hole and a horizontal blind hole which intersect with each other are arranged in the braking box body; the driving piston is arranged in the horizontal blind hole; the braking plunger is arranged at lower part of the vertical blind hole; the connecting rods comprise an upper connecting rod and a lower connecting rod; a revolute pair is arranged between the upper connecting rod and the braking box body; another revolute pair is arranged between the lower connecting rod and the braking plunger; and a fluid channel is arranged in the braking box body to connect the horizontal blind hole with an engine oil fluid network. The driving device has the following beneficial effects: the driving device can be integrated with the engine, thus reducing the height, volume and weight of the engine brake; the hydraulic braking control valve is not needed, thus lowering the cost and reducing the brake response time; the brake load is not borne by liquid, thus enabling the driving device not to be subjected to leakage, deformation and load fluctuation caused by high oil pressure and high oil temperature; and the lift of the brake valve is not affected by the oil temperature and pressure and the air content, thus ensuring that the lift of the brake valve can be a small value, and reducing the requirements for the gap between the engine piston and the air valve.
Description
Technical field:
The present invention relates to mechanical field, relate in particular to the drive unit of the braking device of motor, particularly a kind of engine brake.
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, 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, between cylinder and valve gap, to add packing ring, therefore, increased extraly height, weight and the cost of motor.Above-mentioned these problems are because engine braking system is used as an annex of motor, rather than constituent element of motor or integrated part cause.
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 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 Novel engine brake device, the overhead mode that described this Novel engine brake device will solve engine braking system in the 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 drive unit of this engine brake of the present invention, consisted of by an outlet valve control mechanism, wherein, described outlet valve control mechanism is by the braking casing, connecting rod, driven plunger and spool consist of, be provided with vertical blind hole and horizontal blind hole in the described braking casing, vertically blind hole and horizontal blind hole intersect, be provided with described driven plunger in the described horizontal blind hole, described vertical blind hole bottom is provided with described spool, be provided with in the described driven plunger along its axial grooving, the part of described connecting rod is positioned at described grooving, the width of described grooving is slightly larger than the width of described connecting rod, is provided with the fluid passage in the described braking casing horizontal blind hole is linked to each other with the machine oil fluid network.
Further, described connecting rod comprises connecting rod and lower link, upper connecting rod lower end is connected by revolute pair with the lower link upper end, is provided with revolute pair between described upper small end and the described braking casing, is provided with revolute pair between described lower link lower end and the described spool.
Further, described spool lower end is fixed with an end of spring, the described spring the other end is fixed on the described braking casing, horizontal blind hole outer end in described braking casing is fixed with a spring seat, is provided with the return spring of driven plunger between described driven plunger outer end and the described spring seat.
Further, described upper connecting rod lower end and lower link upper end consist of revolute pair by a spheroid, and described spheroid is arranged in the guide ring, and described guide ring is arranged in the grooving of described driven plunger.
Further, described driven plunger is made of left driven plunger and right driven plunger, be provided with described grooving in the described right driven plunger, the formation revolute pair that matches on described upper connecting rod lower end and the described lower link, described revolute pair is positioned at described grooving.
Further, be provided with the valve clearance adjusting screw on the described braking casing, valve clearance adjusting screw bottom surface and the described upper small end formation revolute pair that matches, the formation revolute pair matches for described lower link lower end and described spool upper end.
Further, the upper end of described spool is provided with and is tilted to outer transitional surface.
Further, described grooving right-hand member up and down side is provided with chamfering, described grooving width direction and described on connecting rod and lower link be Spielpassung.
Further, described braking casing middle part is provided with discharge orifice, and described discharge orifice is with described vertical blind hole and extraneous the connection.
Further, the described braking casing rocking arm that is motor.
Working principle of the present invention is: when the needs motor was converted to the engine braking state from normal working, the engine braking control mechanism was opened fuel feeding, and machine oil flows to the fluid passage of braking in the casing by the brake fluid networking.Oil pressure overcomes return spring on the driven plunger and the load of the spring on the spool, and driven plunger is pushed away to the right in horizontal hole.Connecting rod and lower link are become vertically from inclination, and lower link makes spool become extended position from retracted position, and driving mechanism becomes operating position from off position, realizes the switching of motor from normal working to the engine braking state.When not needing engine braking, the engine braking control mechanism cuts out draining, driven plunger is not subjected to oil pressure, under the effect of its return spring to moving to left, rest on the left side of horizontal hole, upper connecting rod and lower link are inclination from vertically becoming again, and spool separates with the motor normal operation upwards being retracted into off position under the effect of spring in vertical hole.
The present invention compares with prior art, and its effect is actively with obvious.The present invention can become one with motor, thereby reduces height, the volume and weight of engine brake; Need not adopt the hydraulic braking control valve, reduce cost, reduce reaction time; Do not adopt liquid to bear brake load, the leakage, distortion and the load fluctuation that do not have high oil pressure and high oil temperature to cause, brake valve rises the impact that is not subjected to oil temperature, oil pressure and air content, and brake valve rises can obtain less value, reduces the requirement to engine piston and valve clearance.
Description of drawings:
Fig. 1 is the structural representation of drive unit first embodiment of a kind of engine brake of the present invention when being in the off-position.
Fig. 2 is the structural representation of drive unit second embodiment of a kind of engine brake of the present invention when being in the off-position.
Fig. 3 is drive unit second embodiment's of a kind of engine brake of the present invention application schematic representation.
Embodiment:
Embodiment 1:
As shown in Figure 1, the drive unit 100 of a kind of engine brake of the present invention, consisted of by a braking casing 2102, upper connecting rod 186, lower link 186 and a driven plunger 162 that structure is identical, driven plunger 162 is positioned at the horizontal piston hole 260 of braking casing 2102, usually push the left side to by return spring 156, rest on the end face 246 of piston hole 260.The other end of return spring 156 is positioned on the spring seat 158, and spring seat 158 is by ring washer 157 location that are fixed on the braking casing 2102.There is a grooving 137 as guiding groove the centre of driven plunger 162, the diameter of the width of guiding groove 137 and upper connecting rod and lower link 186 is roughly the same, there are two chamferings 163 on the right of guiding groove 137, and the inclination that upper connecting rod, lower link 186 are in when being positioned at horizontal hole 260 left end with driven plunger 162 is roughly the same.There is a spheroid 189 centre of upper connecting rod, lower link 186, and its diameter is identical with the diameter of upper connecting rod, lower link 186.Surface of contact between upper connecting rod, lower link 186 and the spheroid 189 is 125, and both all are contained in the guiding groove 137.Spheroid 189 also is contained in the guide ring 188.The left side of guide ring 188 is positioned at the grooving 187 on driven plunger guiding groove 137 left sides, in the grooving that is contained in up and down two connecting rods 186 185 of ring, the right of guide ring 188 ring then lean against driven plunger guiding groove 137 right inside surperficial 165 on.Spool 160 is positioned at the vertical piston hole 190 of braking casing 2102, links to each other by the protruding sphere of the 3rd concave spherical surface 128 with the bottom of lower link 186, and sphere 128 joins with the conical surface 126.The inclination of the angle of the conical surface 126 and lower link 186 is roughly the same.Brake spring 177 will push away on the spool 160, with lower link 186 pretensions.Brake spring 177 is fixed on the braking casing 2102 by nut 179.
For adjustable brake valve clearance (initial position of spool 160), driving mechanism 100 also contains the valve clearance controlling mechanism, comprise valve clearance adjusting screw 1102, the lower end of adjusting screw 1102 links to each other by the second concave spherical surface 122 with upper connecting rod 186, and the upper end is fastened on the braking casing 2102 by nut 1052.Draining hole 168 on the braking casing 2102 is the hydraulic pressure lockings that prevent that leakage of oil from causing.
The working procedure of present embodiment is: when the needs motor is converted to the engine braking state from normal working, engine braking control mechanism (not shown) is opened fuel feeding, machine oil is by the brake fluid networking, comprise the fluid passage 214 in the braking casing 2102, flow to the driving mechanism 100 of break.Oil pressure overcomes return spring 156 on the driven plunger 162 and the load of the brake spring 177 on the spool 160, and driven plunger 162 is pushed away to the right in horizontal hole 260.Driven plunger 162 promotes guide ring 188 to the right, and guide ring 188 promotes spheroids 189, and spheroid 189 promotes connecting rods 186, and connecting rod, lower link 186 are become vertically from inclination.The spool 160 that links to each other with the bottom of lower link 186 by sphere 128 becomes extended position from retracted position, driving mechanism 100 becomes operating position from off position (Fig. 1), realizes the switching (reference below the applicating example of Fig. 3) of motor from normal working to the engine braking state.
When not needing engine braking, the engine braking control mechanism cuts out draining, and driven plunger 162 is not subjected to oil pressure, to moving to left, rests on the left side 246 of horizontal hole 260 under the effect of its return spring 156.Upper connecting rod, lower link 186 are inclination from vertically becoming again, and spool 160 separates with the motor normal operation upwards being retracted into off position under the effect of brake spring 177 in vertical hole 190.
Embodiment 2:
As shown in Figure 2, the driving mechanism 100 of present embodiment is embodiment 1 differentiation.Driven plunger comprises right driven plunger 162 and left driven plunger 164.Still be connected by sphere 125 between the upper connecting rod 184 of present embodiment and the lower link 186, but do not have spheroid, also do not need guide ring.Right driven plunger 162 is still with guiding groove 137, the diameter of the width of guiding groove 137 and two connecting rods 184 and 186 is roughly the same, there are two chamferings 163 on the right of guiding groove 137, and the inclination that goes up connecting rod 184 and 186 when being positioned at horizontal hole 183 left side with left driven plunger 164 is roughly the same.Spool 160 is positioned at the vertical piston hole 190 of braking casing 2102, links to each other by the 3rd protruding sphere of the 3rd concave spherical surface 128 with the bottom of lower link 186, and the 3rd concave spherical surface 128 joins with the conical surface 126.The inclination of the angle of the conical surface 126 and lower link 186 is roughly the same.Spring 177 will push away on the spool 160, with connecting rod 184 and 186 pretensions, makes the lower bulb of connecting rod 184 near the right surface of left driven plunger 164.In order to regulate valve clearance (initial position of spool 160), connecting rod 184 and 186 must separate with the right side of guiding groove 137.Can realize by the mobile limited location of right driven plunger 162, make the stroke of right driven plunger 162 less than the stroke of left driven plunger 164.So right driven plunger hole 260 is greater than left driven plunger hole 183.Certainly, also can use other method, such as the combination of pin and gain, limit the movement of right driven plunger 162.
Fig. 3 is that of second embodiment of drive unit of a kind of engine brake of the present invention uses schematic representation.The braking casing 2102 of driving mechanism is a special-purpose brake rocker arm, for braking the part of special-purpose exhaust valve actuation device 2002.Brake special-purpose exhaust valve actuation device 2002 and also comprise brake cam 2302, cam follower wheel 2352 and brake spring 1982.2302 of brake cams contain the small boss 232 and 233 that is positioned on the basic circle 2252, are used for engine braking.
The normal operation of engine exhaust valve is driven by engine exhaust valve system or valve actuator 200 and produces.Outlet valve is 200 to comprise cam 230, cam follower wheel 235, rocking arm 210, valve bridge 400, and outlet valve 300.3001 and 3002 of outlet valve 300 is biased on the valve seat 320 of engine cylinder-body 500 by engine air valve spring 3101 and 3102, stops gas to flow between engine cylinder and outlet pipe 600.Rocking arm 210 is installed on the pitman arm shaft 205 rock typely, with the motion of cam 230, passes to outlet valve 300, and it is is periodically opened and closed.Also may there be miscellaneous part in outlet valve system, such as the valve clearance adjusting screw with resemble foot pad etc., economizes approximately at this for the purpose of concise and to the point.Cam 230 has a large boss 220 at interior basic circle more than 225, produce main valve and rise curve, is used for normal engine operation.
When the needs motor is converted to the engine braking state from normal working, engine braking control mechanism (not shown) is opened fuel feeding, machine oil is by the brake fluid networking, comprise the fluid passage 214 in fluid passage 211, radial hole 212 and the rocking arm in the pitman arm shaft, flow to the driving mechanism 100 of break.Oil pressure first, after overcome spring 177 on the spool 160 and the load of the return spring 156 on the right driven plunger 162, left driven plunger 164 is pushed away (Fig. 2) to the right in horizontal hole 183.Left driven plunger 164 promotes connecting rod 184 to the right, and it and lower link 186 are become vertically from inclination.The spool 160 that links to each other with the bottom of lower link 186 by the 3rd concave spherical surface 128 becomes extended position from retracted position.The stroke of spool 160 has been eliminated the gap 132 between spool 160 and the braking mandril 116, the driving mechanism that moves through break 100 and braking mandril 116 that the small boss 232 and 233 of brake cam 2302 produces are delivered to outlet valve 3001, produce engine braking.
When not needing engine braking, the engine braking control mechanism cuts out draining, left driven plunger 164 and right driven plunger 162 are not subjected to oil pressure, under the effect of return spring 156 to moving to left, right driven plunger 162 rests in the place, right side (Fig. 2) of horizontal hole 183, left driven plunger 164, continues to moving to left under the horizontal component effect of upper connecting rod 184 and lower link 186 by spring 177, rests on the left side 246 of horizontal hole 183.At this moment, connecting rod 184 and 186 is inclination from vertically becoming again, and spool 160 vertically upwards is being retracted into off position in the hole 190, and forms gap 132 between the braking mandril 116, so that the driving mechanism 100 of break separates with the motor normal operation.
Embodiments of the invention are that the present invention will be described, rather than limit it.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 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.Embodiment not only can be used for can also being used in the exhaust rocker arm 210 of existing motor in the special-purpose brake rocker arm 2102 shown in Figure 3.In addition, between upper connecting rod 184 and the lower link 186, between upper connecting rod 184 and braking casing 2102 or the adjusting screw 1102 and the revolute pair that consists of between lower link 186 and the brake piston 160 also can be cylinder or other connection.In fact, the motion between driven plunger 162 and the brake piston 160 can be realized by single connecting rod.Therefore, the present invention will comprise above-mentioned modification and change, as long as they belong within appended claim or the scope suitable with requirement power.
Claims (8)
1. the drive unit of an engine brake, consisted of by an outlet valve control mechanism, it is characterized in that: described outlet valve control mechanism is by the braking casing, connecting rod, right driven plunger, left driven plunger and spool consist of, be provided with vertical blind hole and horizontal blind hole in the described braking casing, vertically blind hole and horizontal blind hole intersect, be provided with described right driven plunger and left driven plunger in the described horizontal blind hole, described right driven plunger is positioned at the outer end of horizontal blind hole, described left driven plunger is positioned at the inner of horizontal blind hole, the bottom of described vertical blind hole is provided with described spool, the lower end of described spool is provided with an end of brake spring, the other end of described brake spring is fixed on the described braking casing, there is a spring seat outer end of the horizontal blind hole in the described braking casing, be provided with return spring between the outer end of described spring seat and right driven plunger, be provided with in the described right driven plunger along its axial grooving, the part of described connecting rod is positioned at described grooving, the width of described grooving is slightly larger than the width of described connecting rod, is provided with the fluid passage in the described braking casing horizontal blind hole is linked to each other with the brake fluid network.
2. the drive unit of engine brake as claimed in claim 1, it is characterized in that: described connecting rod comprises connecting rod and lower link, upper connecting rod lower end is connected by revolute pair with the lower link upper end, be provided with revolute pair between described upper small end and the described braking casing, be provided with revolute pair between described lower link lower end and the described spool.
3. the drive unit of engine brake as claimed in claim 2, it is characterized in that: described upper connecting rod lower end and lower link upper end consist of revolute pair by a spheroid, described spheroid is arranged in the guide ring, and described guide ring is arranged in the grooving of described right driven plunger.
4. the drive unit of engine brake as claimed in claim 1 or 2 is characterized in that: be provided with the valve clearance adjusting screw on the described braking casing, valve clearance adjusting screw bottom surface and the described upper small end formation revolute pair that matches.
5. the drive unit of engine brake as claimed in claim 1 is characterized in that: the transitional surface outside the upper end of described spool is provided with and is tilted to.
6. the drive unit of engine brake as claimed in claim 2 is characterized in that: described grooving right-hand member is provided with chamfering in the side up and down, described grooving width direction and described on connecting rod and lower link be Spielpassung.
7. the drive unit of engine brake as claimed in claim 1 is characterized in that: described braking casing middle part is provided with discharge orifice, and described discharge orifice will described vertical blind hole and extraneous connection.
8. the drive unit of engine brake as claimed in claim 1, it is characterized in that: described braking casing is the rocking arm of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110041875.2A CN102191965B (en) | 2010-02-26 | 2011-02-14 | Driving device of engine brake |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020119327.8 | 2010-02-26 | ||
| CN201010114320 | 2010-02-26 | ||
| CN201020119327 | 2010-02-26 | ||
| CN201010114320.1 | 2010-02-26 | ||
| CN201110041875.2A CN102191965B (en) | 2010-02-26 | 2011-02-14 | Driving device of engine brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102191965A CN102191965A (en) | 2011-09-21 |
| CN102191965B true CN102191965B (en) | 2013-04-03 |
Family
ID=44600737
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120043166.3U Expired - Fee Related CN202140127U (en) | 2010-02-26 | 2011-02-14 | Driving mechanism of engine braking device |
| CN201110041875.2A Active CN102191965B (en) | 2010-02-26 | 2011-02-14 | Driving device of engine brake |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120043166.3U Expired - Fee Related CN202140127U (en) | 2010-02-26 | 2011-02-14 | Driving mechanism of engine braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN202140127U (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202140127U (en) * | 2010-02-26 | 2012-02-08 | 上海尤顺汽车部件有限公司 | Driving mechanism of engine braking device |
| CN104279020B (en) * | 2013-07-10 | 2017-11-24 | 上海尤顺汽车部件有限公司 | A kind of solid chain type engine valve actuator |
| CN114729581B (en) | 2019-08-19 | 2024-01-12 | 上海尤顺汽车技术有限公司 | Valve driving device and valve driving mechanism for engine |
| CN114526138A (en) * | 2019-08-19 | 2022-05-24 | 上海尤顺汽车技术有限公司 | Engine valve driving mechanism |
| CN113482742A (en) * | 2021-03-01 | 2021-10-08 | 褚平华 | Valve driving device of engine and driving method thereof |
| CN114462166B (en) * | 2022-02-17 | 2024-03-15 | 成都飞机工业（集团）有限责任公司 | Method, device, equipment and medium for designing electric control brake valve |
| WO2024051732A1 (en) * | 2022-09-07 | 2024-03-14 | 上海尤顺汽车技术有限公司 | Auxiliary valve driving mechanism |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU694703B2 (en) * | 1996-10-11 | 1998-07-23 | Mitsubishi Fuso Truck And Bus Corporation | Engine-brake assisting system |
| JP4030401B2 (en) * | 2002-09-27 | 2008-01-09 | 本田技研工業株式会社 | 4-cycle direct injection engine |
| CN102003238B (en) * | 2009-08-31 | 2013-05-01 | 上海尤顺汽车部件有限公司 | Engine braking device |
| CN202140127U (en) * | 2010-02-26 | 2012-02-08 | 上海尤顺汽车部件有限公司 | Driving mechanism of engine braking device |
-
2011
- 2011-02-14 CN CN201120043166.3U patent/CN202140127U/en not_active Expired - Fee Related
- 2011-02-14 CN CN201110041875.2A patent/CN102191965B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN202140127U (en) | 2012-02-08 |
| CN102191965A (en) | 2011-09-21 |
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Address after: Fengxian District Shanghai Fengcheng town in 201411 Road No. 353 Patentee after: Shanghai Youshun Automobile Technology Co.,Ltd. Address before: Fengxian District Shanghai Fengcheng town in 201411 Road No. 353 Patentee before: Shanghai Universoon Autoparts Co.,Ltd. |