CN101994538B - Driving mechanism for engine brake - Google Patents
Driving mechanism for engine brake Download PDFInfo
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- CN101994538B CN101994538B CN 200910056200 CN200910056200A CN101994538B CN 101994538 B CN101994538 B CN 101994538B CN 200910056200 CN200910056200 CN 200910056200 CN 200910056200 A CN200910056200 A CN 200910056200A CN 101994538 B CN101994538 B CN 101994538B
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- driving force
- station
- control piston
- outlet valve
- driving
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Abstract
The invention relates to a driving mechanism for engine brake, which consists of an exhaust valve control mechanism, wherein the exhaust valve control mechanism consists of a driving force input mechanism and a driving force transmission mechanism, the driving force input mechanism is connected with the driving force transmission mechanism, an exhaust valve contact end is arranged in the driving force transmission mechanism, and is connected with a station control piston which is arranged in the driving force transmission mechanism, and the exhaust valve contact end is provided with a first station and a second station. The driving mechanism utilizes the engine power for driving a control valve rod of an exhaust valve, drives the control valve rod of the engine exhaust valve without usinga hydraulic device with high oil pressure, can be integrated with the engine, can reduce the size and the weight, reduces the brake reaction time, and eliminates high oil pressure and the leakage, deformation and load fluctuation caused by high oil pressure, and the brake valve rise is not influenced by the oil temperature, the oil pressure and the air content and can be designed to present a smaller size, so the requirement on an engine piston and the air valve gap can be reduced.
Description
Technical field:
The present invention relates to mechanical field, relate in particular to the braking device of motor, particularly a kind of driving mechanism for engine braking.
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 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 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 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 object of the present invention is to provide a kind of driving mechanism for engine braking, the overhead mode that described this driving mechanism for engine braking will solve the prior art engine braking system 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.
This driving mechanism for engine braking of the present invention is made of an outlet valve control mechanism, wherein, described outlet valve control mechanism is made of a driving force input mechanism and a driving force transfer mechanism, described driving force input mechanism is connected with the driving force transfer mechanism, be provided with an outlet valve contact jaw in the driving force transfer mechanism, described outlet valve contact jaw is connected by driving mechanism with a station control piston, be provided with a hydraulic pressure cavity volume in the driving force transfer mechanism, described station control piston is arranged in the described hydraulic pressure cavity volume, the hydraulic pressure cavity volume is connected with a controller by the fluid passage, and the outlet valve contact jaw has first station and second station.
Further, described driving force input mechanism is made of a cam.
Further, described driving force transfer mechanism is made of a rocking arm and a pitman arm shaft, and described rocking arm is arranged on the pitman arm shaft, and an end of rocking arm is connected with the driving force input mechanism, and described hydraulic pressure cavity volume is arranged in the other end of rocking arm.
Further, described driving force input mechanism is made of a cam, and the relative position of described pitman arm shaft and cam is fixed, and an end of rocking arm is positioned at the rotation round of the bump of described cam,
Further, described station control piston has a primary importance and a second place.
Further, described controller is made of the two-bit triplet solenoid valve.
Further, described station control piston has return spring.
Further, described station control piston has axially locating mechanism.
Further, described station control piston has radial location mechanism.
Working principle of the present invention is: the driving force input mechanism is connected with the power take-off mechanism of motor, for example, cam is connected in the power take-off mechanism of motor.The driving force transfer mechanism transmits drive actions to the control valve rod of engine exhaust valve, unique position that can contact with the control valve rod of engine exhaust valve in the driving force transfer mechanism is the outlet valve contact jaw, the outlet valve contact jaw is under the control of station control piston, between first station and second station, switch, when first station, the outlet valve contact jaw touches the control valve rod of outlet valve, the action of driving force transfer mechanism can promote the control valve rod of outlet valve, and the action of outlet valve is by the motivational drive from motor; When second station, the control valve rod of outlet valve contact jaw and outlet valve breaks away from and keeps the gap, and the action of driving force transfer mechanism is to the not effect of control valve rod of outlet valve.The position of station control piston is controlled by controller, and the hydraulic channel between station control piston and the controller is locking system independently.
The present invention compares with prior art, and its effect is actively with tangible.The present invention utilizes the control valve rod of the motivational drive engine exhaust valve of motor, do not use the hydraulic pressure installation of high oil pressure to drive the control valve rod of engine exhaust valve, therefore can integrate with motor, reduce volume and weight, reduced reaction time, leakage, distortion and load fluctuation that high oil pressure and high oil pressure cause have been eliminated, brake valve rises the influence that is not subjected to oil temperature, oil pressure and air content, the brake valve liter can design forr a short time, reduces the requirement to engine piston and valve clearance.
Description of drawings:
Fig. 1 is the working principle schematic representation of a kind of driving mechanism for engine braking of the present invention.
Fig. 2 is the schematic representation that the controller of a kind of driving mechanism for engine braking of the present invention is operated in open position.
Fig. 3 is the schematic representation that the controller of a kind of driving mechanism for engine braking of the present invention is operated in closed position.
Fig. 4 is an embodiment's of a kind of driving mechanism for engine braking of the present invention schematic representation.
Embodiment:
Embodiment 1:
As shown in Figure 4, a kind of driving mechanism 100 for engine braking of the present invention, constituted by an outlet valve control mechanism, wherein, described outlet valve control mechanism is made of a driving force input mechanism 230 and a driving force transfer mechanism 2002, described driving force input mechanism 230 is connected with driving force transfer mechanism 2002, be provided with an outlet valve contact jaw in the driving force transfer mechanism 2002, described outlet valve contact jaw and a station control piston 160 are connected by driving mechanism, be provided with a hydraulic pressure cavity volume 166 in the driving force transfer mechanism 2002, described station control piston 160 is arranged in the described hydraulic pressure cavity volume 166, hydraulic pressure cavity volume 166 is connected with a controller by the fluid passage, and the outlet valve contact jaw has first station and second station.
Further, described driving force input mechanism 230 is made of a cam 2302.
Further, described driving force transfer mechanism 2002 is made of a rocking arm 2102 and a pitman arm shaft 205, described rocking arm 2102 is arranged on the pitman arm shaft 205, described pitman arm shaft 205 is fixed with the relative position of cam 2302; link of an end of rocking arm 2102 is positioned at the rotation round of the bump of described cam 2302, and described hydraulic pressure cavity volume 166 is arranged in the other end of rocking arm 2102.
Further, described station control piston 160 has a primary importance and a second place.
Further, described controller is made of the two-bit triplet solenoid valve.
Further, described station control piston 160 has return spring.
Further, described station control piston 160 has axially locating mechanism.
Further, described station control piston 160 has radial location mechanism.
Working principle of the present invention is: driving force input mechanism 230 is connected with the power take-off mechanism of motor, for example, cam 2302 is connected in the power take-off mechanism of motor.Driving force transfer mechanism 2002 transmits drive actions to the control valve rod 3001 of engine exhaust valve 300, unique position that can contact with the control valve rod 3001 of engine exhaust valve 300 in the driving force transfer mechanism 2002 is the outlet valve contact jaw, the outlet valve contact jaw is under 160 controls of station control piston, between first station and second station, switch, when first station, the outlet valve contact jaw touches the extending portion 116 of the control valve rod 3001 of outlet valve 300, the action of driving force transfer mechanism 2002 can promote the control valve rod 3001 of outlet valve 300, and the action of outlet valve 300 is by the motivational drive from motor; When second station, the control valve rod 3001 of outlet valve contact jaw and outlet valve 300 breaks away from and keeps gap 130, and the action of driving force transfer mechanism 2002 is to the not effect of control valve rod 3001 of outlet valve 300.The position of station control piston 160 is controlled by controller, and the hydraulic channel between station control piston 160 and the controller is locking system independently.
Fig. 1 has represented that the normal operation 20 of motor and the braking that the present invention realizes operate the universal relation between 10.Have an engine exhaust valve 300 and an exhaust valve actuation device 200 in the typical internal-combustion engine.Exhaust valve actuation device 200 periodically opens and closes outlet valve 300 when the motor normal operation.Braking running 10 realizes by engine braking control mechanism 50 operations a kind of driving mechanism 100 for engine braking of the present invention.A kind of driving mechanism 100 for engine braking of the present invention has an off position 0 and an operating position 1.When the needs motor was converted to engine braking and operates 10 from normal operation 20, engine braking control mechanism 50 was converted to operating position 1 with a kind of driving mechanism 100 for engine braking of the present invention from off position 0.Generally, engine braking control mechanism 50 is in the position of " pass ", and a kind of driving mechanism 100 for engine braking of the present invention is in off position 0, and this moment, a kind of driving mechanism 100 for engine braking of the present invention separated with engine exhaust valve system 300.
As shown in Figure 2, when the needs engine braking, the three-way magnetic valve 51 in the engine braking control mechanism 50 is by open-minded by the electric current of positive terminal 55 and negative terminal 57.The spool 58 of solenoid valve 51 glides, and opens oil-feed port 111, allows hydraulic fluid, and for example engine motor oil flows to the hydraulic channel between station control piston 160 and the controller.For example in fact, this hydraulic channel is included in fluid passage 211 and radial hole 212, the otch in brake rocker arm 2,102 213 and the fluid passage 214 in the pitman arm shaft 205.
As shown in Figure 3, when not needing engine braking, three-way magnetic valve 51 is closed, and moves on the spool 58 and closes oil-feed port 111, opens oil drain out 222, allows machine oil flow out.
Present embodiment is to explanation of the present invention, rather than limits it.In fact, those skilled in the art 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.Therefore, the present invention will comprise above-mentioned modification and change, as long as they belong to appended claim or the scope suitable with the institute prescription.
Claims (7)
1. driving mechanism that is used for engine braking, constituted by an outlet valve control mechanism, it is characterized in that: described outlet valve control mechanism is made of a driving force input mechanism and a driving force transfer mechanism, described driving force input mechanism is connected with the driving force transfer mechanism, described driving force transfer mechanism is made of a rocking arm and a pitman arm shaft, described rocking arm is arranged on the pitman arm shaft; an end of rocking arm is connected with the driving force input mechanism; be provided with a hydraulic pressure cavity volume in the other end of rocking arm; described hydraulic pressure cavity volume is connected with a controller by the fluid passage; be provided with a station control piston in the described hydraulic pressure cavity volume; include an outlet valve contact jaw on the described station control piston; described station control piston has first station and second station; the station control piston is when first station; the outlet valve contact jaw of station control piston is connected with the control valve rod of outlet valve; rocking arm along the station control piston radially to the control valve rod transferring power of outlet valve; the station control piston is when second station, and the outlet valve contact jaw of station control piston and the control valve rod of outlet valve break away from.
2. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described driving force input mechanism is made of a cam.
3. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described driving force input mechanism is made of a cam, the relative position of described pitman arm shaft and cam is fixed, and an end of rocking arm is positioned at the rotation round of the bump of described cam.
4. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described controller is made of the two-bit triplet solenoid valve.
5. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described station control piston has return spring.
6. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described station control piston has axially locating mechanism.
7. the driving mechanism for engine braking as claimed in claim 1, it is characterized in that: described station control piston has radial location mechanism.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910056200 CN101994538B (en) | 2009-08-10 | 2009-08-10 | Driving mechanism for engine brake |
| 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 |
| EP11006452.4A EP2439381B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| 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 |
| PCT/US2009/069622 WO2010078280A2 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| KR1020117018023A KR101290440B1 (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 200910056200 CN101994538B (en) | 2009-08-10 | 2009-08-10 | Driving mechanism for engine brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101994538A CN101994538A (en) | 2011-03-30 |
| CN101994538B true CN101994538B (en) | 2013-09-04 |
Family
ID=43785207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910056200 Expired - Fee Related CN101994538B (en) | 2009-01-05 | 2009-08-10 | Driving mechanism for engine brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101994538B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106536878B (en) * | 2014-05-21 | 2019-05-31 | 伊顿(意大利)有限公司 | Heavy valve actuating mechanism with decompression type engine braking function |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5477824A (en) * | 1994-07-14 | 1995-12-26 | Cummins Engine Company, Inc. | Solenoid valve for compression-type engine retarder |
| EP1219791A2 (en) * | 2000-12-18 | 2002-07-03 | Caterpillar Inc. | Integral engine and engine compression braking heui injector |
| CN1991136A (en) * | 2005-12-28 | 2007-07-04 | 雅各布斯车辆***公司 | Method and system for partial cycle bleeder brake |
| CN201507333U (en) * | 2009-08-10 | 2010-06-16 | 上海尤顺汽车部件有限公司 | Drive mechanism for engine brake |
-
2009
- 2009-08-10 CN CN 200910056200 patent/CN101994538B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5477824A (en) * | 1994-07-14 | 1995-12-26 | Cummins Engine Company, Inc. | Solenoid valve for compression-type engine retarder |
| EP1219791A2 (en) * | 2000-12-18 | 2002-07-03 | Caterpillar Inc. | Integral engine and engine compression braking heui injector |
| CN1991136A (en) * | 2005-12-28 | 2007-07-04 | 雅各布斯车辆***公司 | Method and system for partial cycle bleeder brake |
| CN201507333U (en) * | 2009-08-10 | 2010-06-16 | 上海尤顺汽车部件有限公司 | Drive mechanism for engine brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101994538A (en) | 2011-03-30 |
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Granted publication date: 20130904 Termination date: 20180810 |