CN2272487Y - Valve swing arm mechanism for four-stroke engine - Google Patents
Valve swing arm mechanism for four-stroke engine Download PDFInfo
- Publication number
- CN2272487Y CN2272487Y CN 94217154 CN94217154U CN2272487Y CN 2272487 Y CN2272487 Y CN 2272487Y CN 94217154 CN94217154 CN 94217154 CN 94217154 U CN94217154 U CN 94217154U CN 2272487 Y CN2272487 Y CN 2272487Y
- Authority
- CN
- China
- Prior art keywords
- valve
- rocking arm
- arm
- camshaft
- rocker arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008520 organization Effects 0.000 claims description 16
- 230000003068 static effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The utility model relates to a valve rocker arm mechanism for a four-stroke engine which is provided with a single camshaft and a single rocker arm shaft. The parts of the utility model are reduced. An included angle between an air inlet valve and an exhaust valve is reduced by the arrangement and the application of rocker arms and a cam and the arrangement of a first rocker arm and a second rocker arm (a long rocker arm and a short rocker arm). The air inlet valve, the exhaust valve and an air path can be vertical, and the air inlet efficiency and the exhaust efficiency are improved. The spaces of the camshaft and the link mechanism of the camshaft are relatively reduced, and the volume of a cylinder head, the total volume of the engine and the total weight of the materials are also reduced. A gap between the first rocker arm and the valve rod of an air valve is regulated by a regulating screw, and the second rocker arm is regulated by utilizing the center offset of the shaft center of the rocker arm shaft. The air valve rock arm mechanism of the utility model is matched with an air inlet path, an exhaust path and a combustion chamber, which can ensure the favorable economic and power performances of the engine.
Description
The utility model relates to a kind of structure of rocker arm body, relates in particular to the structure of the valve arm mechanism that is used in four stroke engine.In general, traditional valve arm mechanism uses a camshaft 900 and two long rocking arms 901 (shown in Fig. 3 a), and each long rocking arm 901 respectively has a pitman arm shaft 902, and camshaft axle center 903 is configured in side under two long pitman arm shafts, 902 axle center.In cam when rotation, form slips with 901 on long rocking arm and rotate, because cam swing offset, driving rocking arm 901 is that pivot swings up and down with pitman arm shaft 902, and the timing that driving inlet and outlet valve 904 makes inlet and outlet set according to the camming surface profile is opened or closed.Because long rocking arm 901 length are than length and have more part, so whole rocker arm body occupation space is bigger, thereby make intake duct and air outlet flue 905 be arranged in the cylinder head with angle than level, the result makes charging efficiency lower, especially when turning round with higher rotation speed, the inertia effect and the restriction loss of flowing because of inlet air greatly reduce air charge.Another kind of mode is to adopt twin cam shaft 906 and two tappet 907 (seeing Fig. 3 b), and each cam around the rotation of camshaft center line, directly drives tappet respectively, and toward covering motion, inlet and outlet door 908 is also opened thereupon or closed about doing.But this structure needs very critically to cooperate between part, so permissible accuracy is also higher, and manufacturing expense is relatively higher.
The purpose of the utility model is to improve the inlet and outlet valve angle of four stroke engine, to improve the charging efficiency of motor.
Another purpose of the present utility model is to provide a kind of Valve Rocker Organization of four stroke engine, and its volume is less, and weight is lighter.
A purpose again of the utility model is to provide a kind of Valve Rocker Organization of four stroke engine, makes it easy to manufacture and can improve the performance of motor.
In order to achieve the above object, the valve arm mechanism of the utility model four stroke engine comprises:
One camshaft, this camshaft have first camming surface and second camming surface, and rotated by this engine-driving;
One first rocking arm has first end and the second end, and this first end is driven in the roof pressure mode by first camming surface of this camshaft;
One second rocking arm has the 3rd end and the 4th end, and the 3rd end is driven in the roof pressure mode by second camming surface of this camshaft;
One pitman arm shaft, but articulate with the mode of one turn and the 4th end of this second rocking arm; But and be installed in this first rocking arm between its first end and the second end in the mode of slide relative, simultaneously, make the first end of first rocking arm and this camshaft of the common clamping in the 3rd end of second rocking arm, when this first end and the 3rd end are driven by first and second camming surface of this camshaft respectively, this first rocking arm and this second rocking arm are swung around the axle center of this pitman arm shaft respectively, and the end apical grafting does reciprocating linear motion with respect to the cylinder head of this motor in order to drive this suction valve on the inlet valve spindle of the second end of this first rocking arm and this motor, holds apical grafting to do reciprocating linear motion with respect to this engine cylinder head in order to drive this outlet valve on the 3rd end of this second rocking arm and the outlet valve valve rod of this motor.
Below, describe one of the utility model preferred embodiment in detail by means of accompanying drawing.
Fig. 1 is the longitudinal section that is used for the Valve Rocker Organization of the present utility model on the single-cylinder engine;
Fig. 2 is the top view that is used for the Valve Rocker Organization of the utility model on the single-cylinder engine;
Fig. 3 (a) is the longitudinal section that is installed on the Valve Rocker Organization of the traditional single camshaft on the single-cylinder engine, two pitman arm shaft;
Fig. 3 (b) is for being installed on the traditional double camshaft on the single-cylinder engine, the longitudinal section of the Valve Rocker Organization of vertical compression tappet.
Fig. 1 is the longitudinal section that is installed on the Valve Rocker Organization of the utility model on the single-cylinder engine, and as shown in Figure 1, the Valve Rocker Organization of the four stroke engine of the utility model has: a camshaft 1; The a pair of camshaft 1 that is subjected to drives first rocking arm 2 and second Rocker arm 4 that work swings up and down; One adorns the pitman arm shaft 3 of first rocking arm 2 and second Rocker arm 4 in order to pivot; One is subjected to first rocking arm 2 to drive the intake valve 5 that moves up and down; One is subjected to second Rocker arm 4 to drive the exhaust valve 6 that moves up and down with respect to engine cylinder head 8.When camshaft 1 is driven by engine crankshaft and during rotation, intake cam face 101 rotates thereupon, and roof pressure first rocking arm 2, making first rocking arm 2 is that pivot is done and swung up and down with pitman arm shaft 3, first rocking arm 2 is installed on the pitman arm shaft 3 with respect to the mode of intake cam face 101 with slidably rotation, the point of application of force 201 of first rocking arm 2 contacts with the intake cam face 101 of camshaft 1, the force bearing point 202 of first rocking arm 2 and the top 501 of intake valve 5 contact, in order to the valve timing roof pressure intake valve 5 that the profile according to camming surface 101 sets, make its unlatching or close.Similarly, when camshaft 1 rotation, exhaust cam face 102 rotates thereupon, and roof pressure second Rocker arm 4, making second Rocker arm 4 is that pivot swings up and down with pitman arm shaft 3, second Rocker arm 4 is to be installed on the pitman arm shaft 3 with respect to the mode of exhaust cam face 102 with slidably rotation, and the force bearing point 402 of second Rocker arm 4 and the top 601 of exhaust valve 6 contact, in order to the profile according to exhaust cam face 102 set join healthy tendency the time open or close exhaust valve 6.
Adjustment according to the valve clearance of the Valve Rocker Organization of the utility model can be consulted Fig. 1, first rocking arm 2 utilizes traditional adjustment screw 205 and adjusts nut 204 and do crack adjustment between 101 of rocking arm 2 and the camming surfaces, and second Rocker arm 4 then utilizes itself and the relative turn of pitman arm shaft 3 to adjust crack between 102 on itself and the convex surface.See also Fig. 2, when doing the gap and adjusting, transfer earlier second Rocker arm 4 with the gap of exhaust cam face 102; termination 301 of pitman arm shaft 3 slidably is fitted on the cylinder head 8; its pedestal can be fixed on cylinder head Lower Half 801, also can be fixed on the cylinder head first half 802, consults Fig. 1.Another termination 305 of pitman arm shaft 3 slidably is fitted on the cylinder head 8, and it is concentric with termination 301, but the external diameter of termination 305 is more less than the external diameter of termination 301, small end head 305 have internal thread so that and the retaining screw 306 of pitman arm shaft screw togather, when retaining screw 306 unclamps, the technician can rotate groove 302 with screwdriver, and then rotation pitman arm shaft 3.Its bearing surface 307 and termination 301 and termination 305 are concentric in order to be slidingly matched for 3 of the support 203 of first rocking arm 2 and pitman arm shafts, so during pitman arm shaft 3 turns, first rocking arm 2 will can not produce desaxes with pitman arm shaft 3.Second Rocker arm 4 support 403 also be to be slidingly matched for 3 one-tenth with pitman arm shaft, but its bearing surface 304 and termination 301 and termination 305 decentraction, just second Rocker arm 4 bearing surface 304 and 3 one-tenth of whole pitman arm shafts eccentric, when pitman arm shaft 3 turns, the position of second Rocker arm 4 will be subjected to the influence of eccentric shaft bearing surface 304, and move up and down, make that the force bearing point 401 of second Rocker arm 4 and the gap between the exhaust cam face 102 are changed thereupon, therefore the technician can advise with thin slice and adjust crack between the exhaust valve, after emission valve clearance has been adjusted, with retaining screw 306 lockings, pitman arm shaft 3 is maintained static, emission valve clearance also just immobilizes.Secondly explanation adjust first rocking arm 2 with the step in the gap of intake valve 5, at first, to adjust cap 204 with spanner loosens, to adjust screw 205 precessions or back-out with screwdriver again, adjust the top 501 of the direct apical grafting air intake valve 5 in lower end of screw 205, during adjustment, earlier with first rocking arm 2 point of application of force 201 roof pressure camshafts 1, then, screw 205 is adjusted in rotation, makes between the top 501 of the lower end of adjusting screw 205 and air intake valve 5, produces the gap, this gap is exactly the intake valve gap, gap length can change along with the precession of adjusting screw 205 or back-out, and with thin slice rule measure determine after, will adjust nut 204 to lock, make 205 lockings of adjustment screw motionless, and then the intake valve gap is immobilized.
Be with pressure spring 303 on the pitman arm shaft 3, be used for shifting two rocking arms 2,4 onto precalculated position, the retaining tip 308 is fixed on and is used for blocking second Rocker arm 4 on the cylinder head 8, makes it the location.
The utility model is owing to only use a camshaft 1 and a pitman arm shaft 3, therefore the angle α ' between air intake valve 5 and the drain tap 6 (Fig. 1) diminishes, make whole spaces of whole rocker arm body dwindle, the angle of intake valve can be near vertical, also therefore air inlet air flue 7 can be designed near vertical, air inlet can be flowed in the cylinder more smoothly, so can obtain more high performance motor, especially when the high rotating speed of motor, air inlet is smooth and easy, the air fuel ratio that makes motor is brought into play good performance in proper range.The cost that adds this rocker arm body is very low and can reach the high-performance of modern advanced motor, simultaneously, because the Valve Rocker Organization of the utility model can cooperate motor inlet and outlet road and Combustion chamber design, makes the volume-diminished of cylinder head, is particularly conducive to the engine design that is applied to locomotive.
In addition, because the utility model system is disposed at first rocking arm and second rocking arm about the camshaft, so the space of accommodating entire mechanism with same angle is dwindled.
In addition, because a pitman arm shaft and a protruding armshaft are only used in the utility model creation, the more known valve rocker of part number is few, so fabricating cost can reduce.
Moreover the mode of employing rocker shaft eccentric of regularly adjusting of second rocking arm of the utility model so can save the space of adjusting timing mechanism, makes the overall volume reduction.
In addition, four stroke engine Valve Rocker Organization of the present utility model comprises camshaft 1, first rocking arm 2, second Rocker arm 4 and pitman arm shaft 3 ... or the like part, this position arrangement also can so make the elasticity of design increase by dislocation in the suction valve side or the outlet valve side in the future.
Claims (5)
1. the rocker arm body of a four stroke engine valve, this rocker arm body system is installed on the cylinder head of this motor, and air intake valve and drain tap in order to drive this motor is characterized in that comprising:
One camshaft, this camshaft have first camming surface and second camming surface of the set angle that staggers, and rotated by this engine-driving;
One first rocking arm has first end and the second end, and this first end is driven in the roof pressure mode by first camming surface of this camshaft;
One second rocking arm has the 3rd end and the 4th end, and the 3rd end is driven in the roof pressure mode by second camming surface of this camshaft;
One pitman arm shaft, but it articulates with the mode of one turn and the 4th end of this second rocking arm, but and adorn this first rocking arm between its first end and the second end with the mode pivot of slide relative, simultaneously, make the first end of first rocking arm and this camshaft of the common clamping in the 3rd end of second rocking arm, this first end and the 3rd end are driven by first and second camming surface of this camshaft respectively, when first and second camming surface drives first end and the 3rd end, this first rocking arm and second rocking arm are done oscillating motion around the axle center of this pitman arm shaft respectively, and hold apical grafting on the inlet valve spindle of the second end of this first rocking arm and this motor, in order to drive this suction valve, this suction valve is done reciprocating linear motion with respect to this engine cylinder head, the end apical grafting makes this outlet valve do reciprocating linear motion with respect to this engine cylinder head in order to drive this outlet valve on the 3rd end of this second rocking arm and the outlet valve valve rod of this motor.
2. four stroke engine Valve Rocker Organization as claimed in claim 1 is characterized in that the gap between this first rocking arm and first camming surface, but mat adjustment screw adjusts.
3. four stroke engine Valve Rocker Organization according to claim 1 is characterized in that the gap between this second rocking arm and second camming surface, is to utilize it to adjust with the relative turn of pitman arm shaft.
4. four stroke engine Valve Rocker Organization according to claim 1, it is characterized in that, the 4th end of this second rocking arm what be articulated in this pitman arm shaft partly is can fixing and the mode of mutual turn is articulated in this pitman arm shaft, and mat makes both eccentric and then second rocking arm done the gap adjustment with respect to second this pitman arm shaft of rocking arm turn.
5. by the described four stroke engine Valve Rocker Organization of claim 4, after its feature emission valve clearance adjustment is fixing, the screw that is locked maintains static pitman arm shaft, again by on the second end of this first rocking arm with this inlet valve spindle mutually the adjustment screw of apical grafting do the gap adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94217154 CN2272487Y (en) | 1994-07-08 | 1994-07-08 | Valve swing arm mechanism for four-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94217154 CN2272487Y (en) | 1994-07-08 | 1994-07-08 | Valve swing arm mechanism for four-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272487Y true CN2272487Y (en) | 1998-01-14 |
Family
ID=33832673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94217154 Expired - Lifetime CN2272487Y (en) | 1994-07-08 | 1994-07-08 | Valve swing arm mechanism for four-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272487Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306149C (en) * | 2003-03-17 | 2007-03-21 | 本田技研工业株式会社 | Rocker arm positioning structure |
| CN100406689C (en) * | 2004-04-27 | 2008-07-30 | 三菱扶桑卡客车公司 | Variable valve gear of internal combustion engine |
| CN100432380C (en) * | 2003-11-11 | 2008-11-12 | 株式会社电装 | Driving device and lift regulator using said driving device |
| CN100464058C (en) * | 2007-04-11 | 2009-02-25 | 苏州市吴中区双马机电有限公司 | Air gate on-off control device of overhead cam axle engine |
| CN101487404B (en) * | 2003-08-22 | 2012-07-11 | 布里格斯与斯特拉顿公司 | Valve-operating lever |
| CN102678215A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Simplifying mechanism of fully variable valve timing gear |
| WO2014201952A1 (en) * | 2013-06-17 | 2014-12-24 | 苏州科瓴精密机械科技有限公司 | Four-stroke engine |
| CN109715909A (en) * | 2016-07-20 | 2019-05-03 | Avl李斯特有限公司 | Internal combustion engine with valve actuating apparatus |
-
1994
- 1994-07-08 CN CN 94217154 patent/CN2272487Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306149C (en) * | 2003-03-17 | 2007-03-21 | 本田技研工业株式会社 | Rocker arm positioning structure |
| CN101487404B (en) * | 2003-08-22 | 2012-07-11 | 布里格斯与斯特拉顿公司 | Valve-operating lever |
| CN100432380C (en) * | 2003-11-11 | 2008-11-12 | 株式会社电装 | Driving device and lift regulator using said driving device |
| CN100406689C (en) * | 2004-04-27 | 2008-07-30 | 三菱扶桑卡客车公司 | Variable valve gear of internal combustion engine |
| CN100464058C (en) * | 2007-04-11 | 2009-02-25 | 苏州市吴中区双马机电有限公司 | Air gate on-off control device of overhead cam axle engine |
| CN102678215A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Simplifying mechanism of fully variable valve timing gear |
| WO2014201952A1 (en) * | 2013-06-17 | 2014-12-24 | 苏州科瓴精密机械科技有限公司 | Four-stroke engine |
| EP3012423A4 (en) * | 2013-06-17 | 2017-03-15 | Suzhou Cleva Precision Machinery & Technology Co., Ltd. | Four-stroke engine |
| US9797281B2 (en) | 2013-06-17 | 2017-10-24 | Suzhou Cleva Precision Machinery & Technology Co., Ltd. | Four-stroke engine |
| CN109715909A (en) * | 2016-07-20 | 2019-05-03 | Avl李斯特有限公司 | Internal combustion engine with valve actuating apparatus |
| CN109715909B (en) * | 2016-07-20 | 2021-01-12 | Avl李斯特有限公司 | Internal combustion engine with valve actuating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1274132A (en) | Valve operating mechanism for internal combustion engine | |
| EP0234853B1 (en) | Apparatus for variable valve timing for an internal combustion engine. | |
| CN1046153C (en) | Variable control process and device for an internal combustion engine valve | |
| US5445117A (en) | Adjustable valve system for a multi-valve internal combustion engine | |
| CN1047821C (en) | Variable valve lift mechanism for internal combustion engine | |
| JPS6124533B2 (en) | ||
| US6382151B2 (en) | Ring gear variable valve train device | |
| US7458349B2 (en) | Valve train apparatus for 4 stroke-cycle internal combustion engine | |
| US6439177B2 (en) | Low friction variable valve actuation device | |
| CA2113988C (en) | Intake system for internal combustion engine | |
| JPH0225005B2 (en) | ||
| CN2272487Y (en) | Valve swing arm mechanism for four-stroke engine | |
| US4934344A (en) | Modified four stroke cycle and mechanism | |
| CN100432374C (en) | Mechanism for internal combustion piston engines | |
| US8418663B2 (en) | Cam actuation mechanism with application to a variable-compression internal-combustion engine | |
| JPH10159510A (en) | Valve structure of over head valve type engine | |
| CN2448928Y (en) | Mechanism capable changing valve timing phase and valve lift | |
| US6189497B1 (en) | Variable valve lift and timing camshaft support mechanism for internal combustion engines | |
| JPH1037772A (en) | Intake valve control device of internal combustion engine with supercharger, and control method therefor | |
| WO2003040525A1 (en) | A grooved-cam valve drive mechanism for internal combustion engines | |
| WO2000009868A1 (en) | Variable lift and timing system for valves | |
| CN109854369B (en) | Dovetail slot type engine length-variable connecting rod mechanism and adjusting method thereof | |
| CN115977798A (en) | Internal combustion engine with different stroke length cyclic changes and control method | |
| CN2339753Y (en) | Efficient valve-actuating mechanism of four-stroke engine | |
| JPH09105315A (en) | Multi-dimensional plate slide type-continuously variable valve timing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |