CN104727878A - Method for adjusting auxiliary brake gas distribution phases of overhead camshaft engine - Google Patents
Method for adjusting auxiliary brake gas distribution phases of overhead camshaft engine Download PDFInfo
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- CN104727878A CN104727878A CN201310715133.2A CN201310715133A CN104727878A CN 104727878 A CN104727878 A CN 104727878A CN 201310715133 A CN201310715133 A CN 201310715133A CN 104727878 A CN104727878 A CN 104727878A
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Abstract
The invention discloses a method for adjusting auxiliary brake gas distribution phases of an overhead camshaft engine. The method includes arranging scribed lines (13) corresponding to various cylinders on steps of a camshaft gear hub (18); forming a groove (14) in the middle of a top plane of a camshaft support (7); shifting flywheel tooth rings at a power output end of the engine when brake clearance (15) is about to be adjusted; adjusting an adjusting screw and nut combination (2) on a brake rocker arm (1) when the certain scribed line (13) on the camshaft gear hub (18) rotates into the range of the groove (14) so as to adjust the brake clearance (15) of the certain cylinder; sequentially adjusting the brake clearance (15) between various brake rocker arms (1) and exhaust valve bridges (16) of the other cylinders. A number of the certain cylinder is marked on the certain scribed line (13). The method has the advantages that the method is quite convenient to implement, and the work efficiency and the precision can be improved when the auxiliary brake gas distribution phases are adjusted on engine assembling lines.
Description
Technical field
The present invention relates to vehicle motor distribution device.
Background technique
At present, heavy truck and motorbus motor overhead camshaft distribution device, generally adopt a kind of compression-release retarder complemental brake system, the every cylinder of this device is a set of, wherein brake cam is set up on engine cam, and brake rocker arm is set up on motor rockshaft, and brake rocker arm afterbody roller contacts with brake cam, brake rocker arm head is above air valve bridge one end and keep certain gap, and air valve bridge is placed in valve top.When motor needs braking and vehicle to need to slow down, enter in all brake rocker arms by the unified machine oil that controls of solenoid valve by pitman arm shaft, push the small piston in brake rocker arm open, make to keep in touch between brake rocker arm and exhaust valve bridge, the brake rocker arm now swung along with the rotation of brake cam, ends the stage at engine compresses stroke top dead center and intake stroke, exhaust valve appropriateness is pushed open, thus release cylinder internal power, reach the object of vehicle deceleration.In order to ensure normal vehicle operation, when motor is normal mode of operation, brake rocker arm in this complemental brake system still can swing along with the rotation of camshaft, but brake rocker arm and air valve bridge must remain disengagement, therefore the gap between the brake rocker arm of motor complemental brake system and exhaust valve bridge is accurately adjusted, i.e. brake clearance, very important.
Summary of the invention
The object of this invention is to provide a kind of method adjusting overhead cam shaft generator auxiliary braking port timing, adopt quick, the accurately each cylinder brake rocker arm of adjustment and air valve bridge gap the method for the method energy.
The present invention realizes like this, a kind of method adjusting overhead cam shaft generator auxiliary braking port timing, the step of camshaft gear wheel wheel hub there is the groove corresponding with each cylinder, per pass groove determined according to the angle between the moment of every cylinder adjustable brake clearance and locating stud, the numeral representing respective cylinder is all carved with on per pass groove side, a groove is had in the middle of the plane of camshaft support top, slot opening is towards the side of camshaft gear wheel, the median plane of groove is by the rotating center of gear, the cam axle angular range of width corresponding to the clearance-adjustable between this cylinder brake rocker arm and exhaust valve bridge of groove is determined, during adjustment brake clearance, the first flywheel ring gear of the dynamic engine power output terminal of dish, when the groove indicating certain cylinder numeral on the step of camshaft gear wheel wheel hub turns in the scope of groove, then represent that now this cylinder is on the basic circle of exhaust cam at the afterbody roller of exhaust rocker arm, the afterbody roller of brake rocker arm is on brake cam generating circle simultaneously, now by regulating the adjusting screw nut on this brake rocker arm, the i.e. brake clearance of this cylinder of adjustable, adjust the brake clearance between other each cylinder brake rocker arm and exhaust valve bridges successively, complete the adjustment of overhead cam shaft generator complemental brake system port timing.
The present invention is by the groove in the middle of the digital groove corresponding with each cylinder on camshaft gear wheel wheel hub and camshaft support top plane, adjust the method in the gap between the brake rocker arm of each cylinder complemental brake system of motor and exhaust valve bridge, very convenient, substantially increase working efficiency and the precision of engine assembly production line adjustment port timing.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the six cylinder engine distribution device that the present invention relates to;
Fig. 2 is the schematic perspective view of camshaft gear wheel wheel hub groove and the camshaft support groove corresponding position that the present invention relates to;
Fig. 3 is the schematic perspective view of the brake clearance adjustment position that the present invention relates to;
Fig. 4 is the camshaft and pitman arm shaft mounting point floor map that the present invention relates to;
Fig. 5 is the plan view of Fig. 4;
The graph of a relation of brake cam, exhaust cam and roller when Fig. 6 is adjustment brake clearance.
In figure, 1 is brake rocker arm, and 2 is adjusting screw nut, and 3 is exhaust rocker arm, 4 is intake rocker, and 5 is pitman arm shaft, and 6 is camshaft gear wheel, and 7 is camshaft support, 8 is intake cam, and 9 is exhaust cam, and 10 is brake cam, 11 is camshaft, and 12 is locating stud, and 13 is groove, 14 is groove, and 15 is brake clearance, and 16 is exhaust valve bridge, 17 is the air inlet raft of pontoons, and 18 is camshaft gear wheel wheel hub, and 19 is afterbody roller.
Embodiment
Below in conjunction with accompanying drawing 1,2,3,4,5,6, the invention will be further described.
A kind of method adjusting overhead cam shaft generator auxiliary braking port timing, six cylinder Four valve overhead cam shaft generators, camshaft 11 is provided with intake cam 8, exhaust cam 9 and brake cam 10, brake cam 10 is set up on engine cam 11, pitman arm shaft 5 is provided with intake rocker 4, exhaust is shaken, 3 and brake rocker arm 1, the step of camshaft gear wheel wheel hub 18 there is the groove 13 corresponding with each cylinder, per pass groove 13 is all determined according to the angle between every cylinder adjustable brake clearance 15 and locating stud 12, so the numeral representing respective cylinder is all carved with on per pass groove 13 side, groove 13 side corresponding with the 6th cylinder just indicates the numeral 6 representing this cylinder, the groove 14 of one fixed width is had to open crown center at camshaft support 7, opening is towards camshaft gear wheel 6, the median plane of groove 14 is by the rotating center of gear, the point of theory scope that the camshaft 11 of width corresponding to the clearance-adjustable between this cylinder brake rocker arm 1 and exhaust valve bridge 17 of groove 14 rotates is determined.When the groove 13 indicating certain cylinder numeral on the step of camshaft gear wheel wheel hub 18 turns in the scope of groove 14, then represent that now this cylinder is on the basic circle of exhaust cam 9 at the afterbody roller 19 of exhaust rocker arm 3, the afterbody roller 19 of brake rocker arm 1 is on brake cam 10 generating circle simultaneously, now by regulating the adjusting screw nut 2 on this brake rocker arm 1, with regard to the brake clearance 15 of this cylinder of adjustable, adjust the brake clearance 15 between other each cylinder brake rocker arm 1 and exhaust valve bridges 16 successively, complete the adjustment of overhead cam shaft generator complemental brake system port timing.
During adjustable brake gap 15, first according to normal engine assembly order, intake rocker 4 and the air inlet raft of pontoons 17, valve clearance between exhaust rocker arm 3 and exhaust valve bridge 16 is adjusted, then the flywheel ring gear of the dynamic engine power output terminal of dish, at this moment only need observe above camshaft support 7, when camshaft gear wheel 6 be marked with numeral 6 groove 13 turn to drop on groove 14 scope in time, then represent it is now be on the basic circle of exhaust cam 9 at the afterbody roller 19 of exhaust rocker arm 3, the afterbody roller 19 of brake rocker arm 1 is on the generating circle of brake cam 10 simultaneously, now can carry out the brake clearance 15 of adjustment the 6th cylinder, between the brake rocker arm 1 and exhaust valve bridge 16 at this adjustment position, fill in the iron plate of one piece of 4mm thickness, adjustment adjusting screw nut 2 make iron plate between brake rocker arm 1 and exhaust valve bridge 16 mobile have significantly retardance sense after, tighten adjusting screw nut 2, extract the 6th cylinder brake clearance 15 that iron plate has been adjustment out, continuation dish moves motor, repeat above-mentioned steps, can be fast, adjust the brake clearance 15 of each cylinder of motor easily successively.
The present invention adjusts the method for overhead cam shaft generator complemental brake system port timing, easy to operate, and brake rocker arm 1 phase place of compression-release retarder can be adopted accurately to judge to heavy vehicle motor, thus complete the adjustment of each cylinder brake clearance 15 of motor fast, increase work efficiency, guarantee compression-release retarder reliably working.
Claims (1)
1. one kind adjusts the method for overhead cam shaft generator auxiliary braking port timing, the step that it is characterized in that camshaft gear wheel wheel hub (18) there is the groove (13) corresponding with each cylinder, per pass groove (13) determined according to the angle between the moment of every cylinder adjustable brake clearance (15) and locating stud (12), the numeral representing respective cylinder is all carved with on per pass groove (13) side, a groove (14) is had in the middle of the plane of camshaft support (7) top, groove (14) opening is towards the side of camshaft gear wheel (6), the median plane of groove (14) passes through the rotating center of camshaft gear wheel (6), camshaft (11) rotational angle range of width corresponding to the clearance-adjustable between this cylinder brake rocker arm (1) and exhaust valve bridge (16) of groove (14) is determined, during adjustment brake clearance (15), the first flywheel ring gear of the dynamic engine power output terminal of dish, when the groove (13) indicating certain cylinder numeral on the step of camshaft gear wheel wheel hub (18) turns in the scope of groove (14), then represent that now this cylinder is on exhaust cam (9) basic circle at the afterbody roller (19) of exhaust rocker arm (3), the afterbody roller (19) of brake rocker arm (1) is on brake cam (10) generating circle simultaneously, now by regulating the adjusting screw nut (2) on this brake rocker arm (1), the i.e. brake clearance (15) of this cylinder of adjustable, adjust the brake clearance (15) between other each cylinder brake rocker arm (1) and exhaust valve bridges (16) successively, complete the adjustment of overhead cam shaft generator complemental brake system port timing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715133.2A CN104727878B (en) | 2013-12-23 | 2013-12-23 | Method for adjusting auxiliary brake gas distribution phases of overhead camshaft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715133.2A CN104727878B (en) | 2013-12-23 | 2013-12-23 | Method for adjusting auxiliary brake gas distribution phases of overhead camshaft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104727878A true CN104727878A (en) | 2015-06-24 |
| CN104727878B CN104727878B (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715133.2A Active CN104727878B (en) | 2013-12-23 | 2013-12-23 | Method for adjusting auxiliary brake gas distribution phases of overhead camshaft engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963220A (en) * | 2021-02-08 | 2021-06-15 | 广西玉柴机器股份有限公司 | Brake valve of integrated rocker arm brake mechanism and method for adjusting brake clearance |
| CN113356955A (en) * | 2021-06-18 | 2021-09-07 | 广西玉柴机器股份有限公司 | Method for adjusting brake clearance of special brake rocker arm |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201125758Y (en) * | 2007-12-18 | 2008-10-01 | 广西玉柴机器股份有限公司 | Cam axle structure with cylinder internal exhaust brake |
| CN103075222A (en) * | 2012-12-30 | 2013-05-01 | 洛阳北方企业集团有限公司 | Valve timing adjusting device for engine and use method thereof |
| CN103397923A (en) * | 2013-08-15 | 2013-11-20 | 湖北广奥减振器制造有限公司 | Device for compressing and releasing engine braking |
-
2013
- 2013-12-23 CN CN201310715133.2A patent/CN104727878B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201125758Y (en) * | 2007-12-18 | 2008-10-01 | 广西玉柴机器股份有限公司 | Cam axle structure with cylinder internal exhaust brake |
| CN103075222A (en) * | 2012-12-30 | 2013-05-01 | 洛阳北方企业集团有限公司 | Valve timing adjusting device for engine and use method thereof |
| CN103397923A (en) * | 2013-08-15 | 2013-11-20 | 湖北广奥减振器制造有限公司 | Device for compressing and releasing engine braking |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963220A (en) * | 2021-02-08 | 2021-06-15 | 广西玉柴机器股份有限公司 | Brake valve of integrated rocker arm brake mechanism and method for adjusting brake clearance |
| CN113356955A (en) * | 2021-06-18 | 2021-09-07 | 广西玉柴机器股份有限公司 | Method for adjusting brake clearance of special brake rocker arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104727878B (en) | 2017-03-22 |
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Address after: 2636 Jungong Road, Yangpu District, Shanghai 200438 Patentee after: Shanghai New Power Automotive Technology Co.,Ltd. Address before: 2636 Jungong Road, Yangpu District, Shanghai 200438 Patentee before: SHANGHAI DIESEL ENGINE Co.,Ltd. |
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