CN104612775A - Gap adjustable valve gap bridge for four-valve diesel engine - Google Patents
Gap adjustable valve gap bridge for four-valve diesel engine Download PDFInfo
- Publication number
- CN104612775A CN104612775A CN201510021711.1A CN201510021711A CN104612775A CN 104612775 A CN104612775 A CN 104612775A CN 201510021711 A CN201510021711 A CN 201510021711A CN 104612775 A CN104612775 A CN 104612775A
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- Prior art keywords
- valve
- gap bridge
- gap
- diesel engine
- adjusting screw
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Abstract
The invention discloses a gap adjustable valve gap bridge for a four-valve diesel engine. According to the technical scheme, a blanking cap is arranged on the top of the middle of a gap bridge body, and a protective cap is installed at the upper end of the blanking cap; a bolt hole is formed in a positioning circular bead at one end of the gap bridge body, an adjusting screw is installed in the bolt hole, the adjusting screw and the positioning circular bead are fixed through a nut, and the stroke height of an air inlet valve of an engine and the stroke height of an air outlet valve of the engine are accurately positioned by adjusting the position of the adjusting screw; gapless connection between the gap bridge and the air inlet valve and between the gap bridge and the air outlet valve can be achieved through the adjusting screw, and opening movement and closing movement of the air inlet valve and the air outlet valve are unified. Noise produced by mechanical movement can be effectively lowered on the basis of lowering the requirement for valve length machining. By means of the structural design, the heights of connecting faces of the valves and circular beads can be adjusted, the length machining errors of the two valves can be compensated for, and therefore the numerous problems caused by machining precision or assembling errors of the valves are avoided.
Description
Technical field
The invention belongs to engine components structure, be specifically related to a kind of valve bridge transmission device of diesel engine.
Background technique
Along with the continuous upgrading of diesel technology, the performance of diesel engine is also more and more higher, and burning structure is gradually to many valves future development.Traditional valve actuating gear is the unlatching control being realized inlet and exhaust valve by camshaft, tappet, push rod and rocking arm.This kind of drive structural configuration is compact not, and the stationarity of transmission is relative with reliability poor.Be arranged in cylinder head in many valve diesel major parts by camshaft at present, pitman arm shaft and intake valve, exhaust valve, rocking arm are also all arranged in cylinder head.Passed a bridge by the Movement transmit of camshaft to intake valve and exhaust valve by valve, the unlatching realizing intake valve and exhaust valve controls.The advantage of this arrangement is, engine air door drive mechanism characteristics of compact layout, and Momentum Transfer is steadily reliable, effectively can improve the accuracy of transmission and reduce energy loss.The mode of structure that current valve is passed a bridge be rocking arm for pressing on valve is passed a bridge, passed a bridge by valve and directly transmit the motion to inlet and outlet door, the function not having and regulate gap but valve is passed a bridge.Like this, due to the error produced in valve and cylinder cap manufacturing process, be difficult to ensure that valve is passed a bridge and two valves seamless connectivity simultaneously.For this reason, the present invention proposes a kind of valve device of new model, and clearance-adjustable valve is passed a bridge, and can adjust valve and pass a bridge and the gap of valve, such that Momentum Transfer is more steady, controlled, structural configuration is also compacter.
Summary of the invention
The valve of easy four-valve diesel engine adjustable clearance of the object of the invention is, provide a kind of compact structure, install is passed a bridge, and realizes passing a bridge and the compact siro spinning technology of valve, to control the moving direction of valve by regulating gap.
The technological scheme taked for realizing the present invention of this object is: the top in the middle of gap bridge body is provided with blanking cover, and helmet is equipped with in the upper end of blanking cover.The locating shoulder of gap bridge body one end is provided with bolt hole, and adjustment screw and locating shoulder, built with adjustment screw, are fixed by nut by bolt hole, and the position of adjustment adjusting screw realizes the accurate location to the inlet and outlet door stroke height of motor.
Principle of the present invention is, be connected on the position of gap bridge body both sides locating shoulder at intake valve and exhaust valve, the one end due to locating shoulder is nonadjustable sphere.If in assembling or course of working, when causing air inlet or exhaust two valve length to there is error, by the combustion condition directly had influence in cylinder.The design (gap bridge adjusting screw) of this structure can adjust the height with valve and shoulder junction surface, compensates the machining error of two valve length thus, doing so avoids the problems brought because of valve machining accuracy or assembly error.
The beneficial effect of feature of the present invention and generation is: the seamless connectivity that can be realized gap bridge and inlet and outlet door by adjusting screw, and the opening and closing campaign of inlet and outlet door can be made unified.Gap between gap bridge and valve can being dropped to zero by adjusting screw, reducing on the basis to valve length processing request, effectively can reduce the noise that mechanical motion produces simultaneously.This apparatus structure is simple, easily processing and assembling.
Accompanying drawing explanation
Fig. 1 is Principles and methods sectional drawing of the present invention.
Fig. 2 is the embodiment's three-dimensional structure diagram after the present invention assembles.
Embodiment
Structure of the present invention to be further described by embodiment below in conjunction with accompanying drawing.
The valve of four-valve diesel engine adjustable clearance is passed a bridge, and comprises gap bridge body, helmet, blanking cover, adjustment screw and nut etc.Its structure is: the top in the middle of gap bridge body 1 is provided with blanking cover 3, and helmet 2 is equipped with in the upper end of blanking cover.The locating shoulder of gap bridge body one end is provided with bolt hole, and adjustment screw and locating shoulder, built with adjustment screw 4, are fixed by nut 5 by bolt hole.Gap bridge body is processed with guiding mounting hole 6.The position of adjustment adjusting screw realizes the accurate location to the inlet and outlet door stroke height of motor.
As embodiment, the helmet at top is that W6Mo5Cr4V2 material is made.Nut is M8 × 1mm, thickness is the hexagon nut of 4mm.
During installation, the guiding mounting hole of gap bridge body is aligned in valve gap bridge column 7 fixing in cylinder head, valve is passed a bridge along the upper and lower axial motion of column.The locating shoulder at gap bridge body two ends and the valve 8 of diesel engine assemble, and the shoulder of gap bridge body both sides is on the one hand as connecting end, and the motion on the other hand for valve positions.Gap bridge body (being connected with valve) one end is nonadjustable sphere, and the other end can adjust the gap with valve junction surface by adjusting screw, so just can compensate the machining error of two valve length.Adjusting screw and shoulder 4 are fixed by hexagon nut, and being passed a bridge by valve is realized by the Momentum Transfer of camshaft to valve, and controls the opening and closing of valve.
Because the adjustable scope of adjusting screw is comparatively large, so do not require very high to the machining accuracy of valve length and assembly precision.The valve rocker that moves through of camshaft passes over, and valve rocker is pressed on the helmet of valve gap bridge, completes the transmission conversion between camshaft and valve thus.
Claims (4)
1. the valve of four-valve diesel engine adjustable clearance is passed a bridge, comprise gap bridge body, helmet, blanking cover, adjustment screw and nut, it is characterized in that: the top in the middle of gap bridge body (1) is provided with blanking cover (3), helmet (2) is equipped with in the upper end of blanking cover, the locating shoulder of gap bridge body one end is provided with bolt hole, bolt hole is built with adjustment screw (4), adjustment screw and locating shoulder are fixed by nut (5), the position of adjustment adjusting screw realizes the accurate location to the inlet and outlet door stroke height of motor.
2. pass a bridge according to the valve of four-valve diesel engine adjustable clearance described in claim 1, described gap bridge body is processed with guiding mounting hole (6).
3. pass a bridge according to the valve of four-valve diesel engine adjustable clearance described in claim 1, described helmet is that W6Mo5Cr4V2 material is made.
4. pass a bridge according to the valve of four-valve diesel engine adjustable clearance described in claim 1, described nut is M8 × 1mm, thickness is the hexagon nut of 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021711.1A CN104612775A (en) | 2015-01-15 | 2015-01-15 | Gap adjustable valve gap bridge for four-valve diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510021711.1A CN104612775A (en) | 2015-01-15 | 2015-01-15 | Gap adjustable valve gap bridge for four-valve diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104612775A true CN104612775A (en) | 2015-05-13 |
Family
ID=53147397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510021711.1A Pending CN104612775A (en) | 2015-01-15 | 2015-01-15 | Gap adjustable valve gap bridge for four-valve diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612775A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010141633A1 (en) * | 2009-06-02 | 2010-12-09 | Jacobs Vehicle Systems, Inc. | Method and system for single exhaust valve bridge brake |
| US20110030634A1 (en) * | 2009-08-04 | 2011-02-10 | International Engine Intellectual Property Company, Llc | Bridge and pivot foot arrangement for operating engine cylinder valves |
| CN102080584A (en) * | 2010-12-29 | 2011-06-01 | 潍柴动力扬州柴油机有限责任公司 | Engine and air valve driving mechanism thereof |
| CN203614150U (en) * | 2013-12-03 | 2014-05-28 | 潍柴动力股份有限公司 | Engine valve bridge assembly |
| CN104088725A (en) * | 2014-06-28 | 2014-10-08 | 中国北方发动机研究所(天津) | Intake mechanism capable of realizing fuel gas intake timing |
-
2015
- 2015-01-15 CN CN201510021711.1A patent/CN104612775A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010141633A1 (en) * | 2009-06-02 | 2010-12-09 | Jacobs Vehicle Systems, Inc. | Method and system for single exhaust valve bridge brake |
| US20110030634A1 (en) * | 2009-08-04 | 2011-02-10 | International Engine Intellectual Property Company, Llc | Bridge and pivot foot arrangement for operating engine cylinder valves |
| CN102080584A (en) * | 2010-12-29 | 2011-06-01 | 潍柴动力扬州柴油机有限责任公司 | Engine and air valve driving mechanism thereof |
| CN203614150U (en) * | 2013-12-03 | 2014-05-28 | 潍柴动力股份有限公司 | Engine valve bridge assembly |
| CN104088725A (en) * | 2014-06-28 | 2014-10-08 | 中国北方发动机研究所(天津) | Intake mechanism capable of realizing fuel gas intake timing |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |
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| WD01 | Invention patent application deemed withdrawn after publication |