CN101131110A - Exhaust valve braking device - Google Patents
Exhaust valve braking device Download PDFInfo
- Publication number
- CN101131110A CN101131110A CNA2007101128676A CN200710112867A CN101131110A CN 101131110 A CN101131110 A CN 101131110A CN A2007101128676 A CNA2007101128676 A CN A2007101128676A CN 200710112867 A CN200710112867 A CN 200710112867A CN 101131110 A CN101131110 A CN 101131110A
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- oil
- rocking arm
- piston
- exhaust valve
- valve
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- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The exhaust valve braking equipment includes one exhaust valve, one rocking arm structure and one power set mounted on the cylinder head, and one cylinder head oil passage. The rocking arm structure provided with one oil passage communicated to the main engine oil passage and one oil sealing block includes one rocking arm seat with oil channel and oil hole, one rocking arm shaft with axial oil hole and radial oil hole communicated each other, one rocking arm with oil holes, and one piston couple mounted to the end of the rocking arm and provided with oil holes. The exhaust valve braking equipment keeps the exhaust valve opened to reduce the work produced by the gas in the combustor to the piston, reduce the rotation speed of the engine and raise the braking efficiency.
Description
(1) technical field
The present invention relates to heavy goods vehicles engine exhaust and brake technical field, particularly a kind of exhaust valve braking device.
(2) background technique
Along with heavy truck load-carrying quality constantly increases, diesel engine power is also in continuous increase, car load braking force day is inadequate, particularly vehicle driving is on long descending road surface, Service Brake and Tyte Wear are very serious, and the driver drives easy fatigue, thereby guarantees that vehicle has enough stopping powers, the braking force that the increases car load particular importance that seems.
(3) summary of the invention
In order to solve the not enough and fatigable problem of driver of heavy goods vehicles exhaust butterfly valve braking force that prior art exists, the invention provides a kind ofly can increase the car load braking moment, convenient and practical exhaust valve braking device.
The present invention realizes by following measure: a kind of exhaust valve braking device, comprise exhaust valve, be installed in being used on the cylinder head and open the rocker structure of exhaust valve and be used to drive the power plant of rocking arm rotation and body, cylinder head asphalt channel, described rocker structure is provided with the asphalt channel that communicates with the motor main oil gallery, and the oil sealing compact heap is installed on the described rocker structure;
Described rocker structure comprises rocker arm bracket, pitman arm shaft, rocking arm and piston idol part, described rocker arm bracket is provided with oil groove, be provided with oilhole perpendicular to the bottom surface, the radial direction oil hole that described pitman arm shaft has axial oilhole and communicates with it, described piston idol part is installed in the rocking arm end; have oil inlet hole, draining hole on the rocking arm, and the corresponding position of piston idol part is provided with oil inlet hole, draining hole.
The further improvement of the present invention part is: described piston idol part comprises the rocking arm piston, is sleeved on the piston sleeve of rocking arm piston outside, in the described rocking arm piston sleeve piston spring is installed, the safety check that is used to control the oil-feed oil circuit is installed on the described oil inlet hole, and described safety check below is provided with check-valve spring.
Described power plant comprise the valve tappet that links to each other with engine cam, are installed in the valve actuating push rod that can slide up and down in the valve tappet, and described valve actuating push rod upper end is installed on the described rocking arm by valve adjusting screw.
Described body, cylinder head asphalt channel are included in body and are provided with the oilhole that leads to main oil gallery from the body end face, are being provided with the oil duct that leads to plane on the cylinder cap from the bottom surface on the cylinder head.
Working principle of the present invention: on the basis of existing exhaust butterfly valve braking system, stay open by the control exhaust valve, reduce the merit that the gas in the firing chamber is done piston, effectively reduce engine speed, thereby reduce the car load speed of a motor vehicle, reach the purpose that improves braking force.
Beneficial effect of the present invention:
1. stay open by the control exhaust valve, reduced the merit of the gas in the firing chamber, fall piston
The low engine speed and the car load speed of a motor vehicle have improved braking force.
2. reduce the speed of a motor vehicle when helping the long-time descending of vehicle and make its running velocity scope that remains on a safety and can reduce use, greatly alleviated Service Brake and Tyte Wear, and alleviated driver's driving fatigue degree Service Brake.
3. convenient and practical, easy to manufacture, with low cost, suitable applying.
(4) description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the structural representation of exhaust valve braking device of the present invention;
Fig. 2 is a rocker structure schematic representation of the present invention;
Fig. 3 is the structural representation of piston idol part of the present invention;
Fig. 4 is the structural representation of rocker arm bracket of the present invention;
Fig. 5 is that the B of Fig. 4 is to cross-sectional schematic;
Fig. 6 is the structural representation of body;
Fig. 7 is the structural representation of cylinder head;
Fig. 8 is the structural representation of cylinder head;
Fig. 9 is for band and not with the engine exhaust and brake power test comparative result of this device;
Figure 10 is for band and do not test comparative result with the speed of a motor vehicle of vehicle on the downhill path of this device.
1 engine cam among the figure, 2 valve tappets, 3 valve actuating push rods, 4 rocker arm brackets, 5 valve adjusting screws, 6 oil sealing compact heaps, 7 bolts, 8 adjusting screw assemblies, 9 rocking arms, 10 valve caps, 11 valve collets, 12 spring seats, 13 valve spring, 14 exhaust valves, 15 locking needle rollers, 16 pistons idol part, 17 piston sleeves, 18 rocking arm pistons, 19 safety check, 20 check-valve springs, 21 piston springs, 22 position limit pins, 23 oil inlet holes, 24 draining holes, 25 oil inlet holes, 26 draining holes, 27 pitman arm shafts;
The axial oilhole of a, b radial direction oil hole, c oil groove, d oilhole, e oilhole.
(5) embodiment
A kind of exhaust valve braking device as shown in Figure 1 comprises exhaust valve 14, is installed in the power plant that being used on the cylinder head open the rocker structure of exhaust valve 14 and be used to drive rocking arm rotation, and oil sealing compact heap 6 is installed on the described rocker structure.
Described rocker structure comprises rocker arm bracket 4, pitman arm shaft 27, rocking arm 9 and piston idol part 16 shown in Fig. 4 .5, described rocker arm bracket 4 bottom surfaces are provided with oil groove c, be provided with oilhole d perpendicular to the bottom surface, described pitman arm shaft 27 has axial oilhole a and identical with it radial direction oil hole b, described rocking arm 9 ends are equipped with piston idol part; have oil inlet hole 23, draining hole 24 on the rocking arm 9, and piston idol part also is provided with oil inlet hole 25, draining hole 26 on the corresponding position; Described oil sealing compact heap 6 heads are equipped with adjusting screw assembly 8, and adjusting screw assembly 8 lower ends have the movable sealing plane can conveniently compress draining hole 24, and oil sealing compact heap 6 and rocker arm bracket 4 are fixed on the cylinder head by bolt 7.
Shown in Fig. 2 .3, described piston idol part comprises rocking arm piston 18, is sleeved on the piston sleeve 17 of rocking arm piston 18 outsides, in the described rocking arm piston sleeve 17 piston spring 21 is installed, is installed in safety check 19 on the oil inlet hole 25, between the check-valve spring below the safety check 19 20, rocking arm piston 18 and piston sleeve 17, piston stroke position limit pin 22 is installed, locking needle roller 15 is installed between piston sleeve 17 and the rocking arm 9, is used to limit the motion of whole piston idol part.
Described power plant comprise the valve tappet 2 that links to each other with engine cam 1, are installed in the valve actuating push rod that can slide up and down 3 in the valve tappet 2, and described valve actuating push rod 3 upper ends are installed on the described rocking arm 9 by valve adjusting screw 5.
As Fig. 6, Fig. 7, shown in Figure 8, described body, cylinder head asphalt channel are included in body and are provided with the oilhole e that leads to main oil gallery from the body end face, this oilhole inclination angle is 2.5 °, processing is led to the oil duct of cylinder cover upper planar surface and is intersected from the inclined oil hole of air that the rocker arm bracket mounting plane is processed from the bottom surface on cylinder head, thereby lubricant oil is supplied with actuator.
When vehicle driving need be braked in the downhill path, the driver closes the butterfly valve on the outlet pipe, when cutting out, butterfly valve stops oil automatically, at this moment piston is in the pressure wave that the exhaust valve 14 of that cylinder of aspirating stroke near bottom dead center can produce by the waste gas that the piston of adjacent cylinder is released and opens, this moment, rocking arm piston 18 was under the effect of engine oil pressure of coming in from oil inlet hole 25 and piston spring 21, also move downward, when pressure wave disappearance final vacuum door 14 has the trend of closing under the effect of valve spring 13, this moment, the closure of check ring oil inlet hole 25, adjusting screw 8 sealing planes compress draining hole 24, so just, formed high pressure oil at rocking arm piston 18 upper spaces, under the effect of high pressure oil, make rocking arm piston 18 remain on down pan position, thereby make exhaust valve 14 keep a little aperture, cause the gas in the compression stroke to have a big chunk to discharge from exhaust valve, will lose part energy like this, thereby reduce the acting of expansion stroke to engine piston, engine speed is reduced, thereby Vehicle Speed is lowered.When exhaust stroke, camshaft drives exhaust valve rocker arm by valve tappet 2, valve actuating push rod 3 and valve adjusting screw 5 and rotates, make rocking arm 9 head top surface and adjusting screw 8 sealing planes throw off, draining hole 24 is opened; the high pressure oil of rocking arm piston upper space is just released; rocking arm piston 18 returns, this working procedure is carried out repeatedly.When end of braking, butterfly valve is opened, and motor recovers the proper functioning circulation.
Band by as shown in Figure 9 and not with the engine exhaust and brake power test comparative result of this device, plotted curve has improved engine exhaust and brake power after using this exhaust valve braking device as can be seen.
For reaching, band do not test comparative result by shown in Figure 10 with the speed of a motor vehicle of vehicle on the downhill path of this device, reduce the speed of a motor vehicle when the present invention helps the long-time descending of vehicle as can be seen and make its running velocity scope that remains on a safety and can reduce use Service Brake, greatly alleviate Service Brake and Tyte Wear, and alleviated driver's driving fatigue degree.
Claims (6)
1. exhaust valve braking device is characterized in that: comprises exhaust valve (14), is installed in being used on the cylinder head to open the rocker structure of exhaust valve (14), be used to drive the power plant of rocking arm rotation, and body, cylinder head asphalt channel,
A. described rocker structure is provided with the asphalt channel that communicates with the motor main oil gallery;
Oil sealing compact heap (6) is installed on the b. described rocker structure.
2. exhaust valve braking device according to claim 1, it is characterized in that: described rocker structure comprises rocker arm bracket (4), pitman arm shaft (27), rocking arm (9) and piston idol part, described rocker arm bracket (4) is provided with oil groove (c), be provided with oilhole (d) perpendicular to the bottom surface, the radial direction oil hole (b) that described pitman arm shaft (27) has axial oilhole (a) and communicates with it, described piston idol part is installed in rocking arm (9) end; have oil inlet hole (23), draining hole (24) on the rocking arm (9), and the corresponding position of piston idol part is provided with oil inlet hole (25), draining hole (26).
3. exhaust valve braking device according to claim 2, it is characterized in that: described piston idol part comprises rocking arm piston (18), is sleeved on the outside piston sleeve (17) of rocking arm piston (18), piston spring (21) is installed in the described rocking arm piston sleeve, the safety check (19) that is used to control the oil-feed oil circuit is installed on the described oil inlet hole (25), and described safety check (19) below is provided with check-valve spring (20).
4. exhaust valve braking device according to claim 1 and 2, it is characterized in that: be fixed with spring seat (12) on the described cylinder head, described spring seat (12) below is provided with valve spring (13), and described exhaust valve (14) is fixed on the described spring seat (12) by valve collet (11).
5. according to each described exhaust valve braking device of claim 1 to 3, it is characterized in that: described power plant comprise the valve tappet (2) that links to each other with engine cam (1), be installed in the valve actuating push rod that can slide up and down (3) in the valve tappet (2), described valve actuating push rod (3) upper end is installed on the described rocking arm by valve adjusting screw (5).
6. exhaust valve braking device according to claim 1, it is characterized in that: described body, cylinder head asphalt channel are included in body and are provided with the oilhole (e) that leads to the motor main oil gallery from the body end face, are provided with the oil duct that leads to the cylinder cover upper planar surface from the bottom surface on cylinder head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101128676A CN101131110A (en) | 2007-09-14 | 2007-09-14 | Exhaust valve braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101128676A CN101131110A (en) | 2007-09-14 | 2007-09-14 | Exhaust valve braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101131110A true CN101131110A (en) | 2008-02-27 |
Family
ID=39128492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101128676A Pending CN101131110A (en) | 2007-09-14 | 2007-09-14 | Exhaust valve braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101131110A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666708B (en) * | 2009-09-27 | 2012-02-08 | 浙江宇太汽车零部件制造有限公司 | Oil sealing testing method of exhaust valve rocker and testing device thereof |
| CN102678345A (en) * | 2011-03-16 | 2012-09-19 | 奚勇 | Method and device for braking engine by using valve bridge |
| CN103917762A (en) * | 2011-09-21 | 2014-07-09 | 雅各布斯车辆系统公司 | Method and system for engine cylinder decompression |
| CN102414403B (en) * | 2009-04-27 | 2015-09-09 | 雅各布斯车辆系统公司 | Special rocker arm type engine brake |
| CN105351026A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Engine exhaust brake system |
| US10876438B1 (en) | 2019-08-29 | 2020-12-29 | Zhejiang Liming Intelligent Manufacturing Co., Ltd. | Braking device for electric engine |
| WO2021031230A1 (en) * | 2019-08-16 | 2021-02-25 | 浙江黎明智造股份有限公司 | Electric engine braking device |
-
2007
- 2007-09-14 CN CNA2007101128676A patent/CN101131110A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414403B (en) * | 2009-04-27 | 2015-09-09 | 雅各布斯车辆系统公司 | Special rocker arm type engine brake |
| CN101666708B (en) * | 2009-09-27 | 2012-02-08 | 浙江宇太汽车零部件制造有限公司 | Oil sealing testing method of exhaust valve rocker and testing device thereof |
| CN102678345A (en) * | 2011-03-16 | 2012-09-19 | 奚勇 | Method and device for braking engine by using valve bridge |
| CN103917762A (en) * | 2011-09-21 | 2014-07-09 | 雅各布斯车辆系统公司 | Method and system for engine cylinder decompression |
| CN103917762B (en) * | 2011-09-21 | 2017-05-24 | 雅各布斯车辆系统公司 | Method and system for engine cylinder decompression |
| CN105351026A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Engine exhaust brake system |
| CN105351026B (en) * | 2015-11-23 | 2018-01-30 | 潍柴动力股份有限公司 | A kind of engine exhaust and brake system |
| WO2021031230A1 (en) * | 2019-08-16 | 2021-02-25 | 浙江黎明智造股份有限公司 | Electric engine braking device |
| US10876438B1 (en) | 2019-08-29 | 2020-12-29 | Zhejiang Liming Intelligent Manufacturing Co., Ltd. | Braking device for electric engine |
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