CN100419223C - Three air valve motorcycle motor variable air inlet valve air distribution device - Google Patents
Three air valve motorcycle motor variable air inlet valve air distribution device Download PDFInfo
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- CN100419223C CN100419223C CNB2006100545649A CN200610054564A CN100419223C CN 100419223 C CN100419223 C CN 100419223C CN B2006100545649 A CNB2006100545649 A CN B2006100545649A CN 200610054564 A CN200610054564 A CN 200610054564A CN 100419223 C CN100419223 C CN 100419223C
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- intake rocker
- air inlet
- valve
- main intake
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Abstract
An admission device with the variable intake valve of the three-valve motorcycle engine is provided in the invention. The exhaust cam (7), the main inlet cam (2) and the inlet Idler (3) are on the camshaft (1), the line of the inlet Idler (3) is the entire round, its diameter is the same as the base diameter of the main inlet cam (2). The inlet rocker axis (4) has the major and the minor Inlet Rocker (5, 6). The clutch device composed of the initiative piston (10), the spacing spring (11), the switching piston (12), the blocking piston(13), the blocking Spring (14) and the lock sheet is between the major and the minor Inlet Rocker(5,6). According to the engine speed and load condition, the engine can switch between the single-intake valve and double-valve modes automatically. So it can increase the power, economy and emission characteristic in the whole speed and loading condition scope of the motorcycle. The whole structure is simple and contract, it has a small change to the original admission device.
Description
Technical field
The invention belongs to technical field of engines, specifically, relate to the air distributing device of motorcycle engine.
Background technique
(50ml～250ml) the most employing of motorcycle engine is single-cylinder four-stroke two air valve structures to the medium and small discharge capacity of tradition, and its air distributing device mainly adopts the Single Over Head Camshaft form of compact structure.In the manufacturing and designing of motor, be high speed power character, fuel economy and the reduction noxious emission that improves motor, adopting many Valves Technology is present otherwise effective technique measure and means.The three valve structure is more suitable in the requirement of small displacement motorcycle engine spatial structure compactness than other many air valve structures, and more can effectively bring into play the characteristics and the advantage of many Valves Technology, so three valve (two intake valves and an exhaust valve) motor becomes the configuration main flow of medium and small discharge capacity motorcycle gradually.
The three valve motorcycle engine adopts two intake valves, and the intake valve circulation area is enlarged markedly, and the motor charging efficiency rises, and the circulation charge strengthens, and output torque improves; Two intake valves replace an original intake valve to make the size of single valve reduce in addition, weight saving, and the average Mach number of each intake valve of flowing through significantly reduces, and helps improving the rated engine speed of motor, increases power.Therefore, the power performance index of three valve motorcycle engine will be apparently higher than traditional two valve motorcycle engines.
But its air distributing device of motorcycle engine of existing three valve structure is that a duplex intake rocker is set on the intake rocker axle, and the duplex intake rocker opens and closes two intake valves under the intake cam effect on the camshaft simultaneously.Though this structure can improve power character, fuel economy and the emission performance of motorcycle under high speed high load working condition, but be not whole service operating mode to motor all be favourable, for example: for idling, low speed and load operating mode, less inlet flow area helps suppressing the refluence of exhaust to intake duct on the contrary, thereby helps improving combustion stability and improve fuel economy; Under the moderate duty working condition, reducing the intake valve circulation area but is favourable for reducing pumping loss and improving fuel economy comparatively speaking.Therefore existing three valve motorcycle engine air distributing device can not be taken into account power performance, fuel economy and the emission performance of motor under low speed and load and high speed high load working condition simultaneously.
Summary of the invention
The problem to be solved in the present invention provides a kind of three air valve motorcycle motor variable air inlet valve air distribution device, can not take into account the problem of power character, fuel economy and the emission performance of motor under low speed and load and high speed high load working condition simultaneously with the air distributing device that solves existing three valve motorcycle engine.
For solving the problems of the technologies described above, three air valve motorcycle motor variable air inlet valve air distribution device of the present invention, include camshaft and intake rocker axle, an exhaust cam, a main intake cam and an air inlet idle pulley are arranged on camshaft, the molded lines of this air inlet idle pulley is a full circle, its diameter equals the base circle diameter (BCD) of main intake cam, and the air inlet idle pulley is between exhaust cam and main intake cam; Two intake rockers are installed on the intake rocker axle accordingly, and wherein contacted with main intake cam is main intake rocker, and contacted with the air inlet idle pulley is time intake rocker, is provided with clutch mechanism between the primary and secondary intake rocker; By main intake cam, air inlet idle pulley, main intake rocker and inferior intake rocker and clutch mechanism, motor can run on single air inlet mode of operation and two air inlet mode of operation.
Because the molded lines of air inlet idle pulley is a full circle, and its diameter equals the base circle diameter (BCD) of main intake cam, the air inlet idle pulley is with not making time intake rocker produce action in the camshaft rotation process, only inferior intake rocker is played position-limiting action, therefore when being separated state between the primary and secondary intake rocker, be in closed condition with the corresponding intake valve of inferior intake rocker, under the drive of main intake cam, carry out on-off action with the corresponding intake valve of main intake rocker, be that motor is in single intake valve mode of operation, can adapt to the requirement of low engine speed running on the lower load; When making the combination of primary and secondary intake rocker be in linkage status by clutch mechanism, main intake cam drives the primary and secondary intake rocker simultaneously makes two intake valves carry out on-off action, be that motor is in two intake valve mode of operations, can adapt to the working condition requirement of high engine speeds high load.The present invention can be automaticallyed switch between single intake valve and two intake valve mode of operation according to the different rotating speed of motor, load condition, thereby improves power character, Economy and the emission performance of motorcycle engine in whole rotating speed and load condition scope.
As preference, above-mentioned clutch mechanism is by active piston, limit spring, switching piston, stop piston, stop that spring and locking plate constitute, active piston wherein, limit spring and switching piston are positioned at the piston hole of main intake rocker, limit spring is between switching piston and active piston, stop piston and stop that spring is positioned at the piston hole of time intake rocker, switching piston contacts with stopping the piston outer end, active piston, switching piston and stop that the external diameter of piston is identical, before active piston is provided with, back locating slot, one end of locking plate radially pass the piston hole sidewall of main intake rocker and insert on the active piston the prelocalization groove or the back locating slot in, intake rocker axle and main intake rocker are provided with the oil duct that is connected, and this oil duct is connected with the inner bottom part of main intake rocker piston hole.When motor changes to high speed high load operating mode by low speed and load, feed high-pressure oil in the oil duct, if the point of contact of at this moment main intake rocker and main intake cam is not on the basic circle of main intake cam, piston hole decentraction between main intake rocker and time intake rocker, the active piston segment distance that under the engine oil pressure effect, advances, make locking plate leave the prelocalization groove of active piston, but switching piston can not enter in the piston hole of time intake rocker, and remain separated from one another between the primary and secondary intake rocker this moment.When the point of contact of main intake rocker and main intake cam is positioned on the main intake cam basic circle, main intake rocker is concentric with the piston hole between time intake rocker, active piston continues reach under the engine oil pressure effect and the promotion switching piston enters in the piston hole of time intake rocker, the switching piston that enters in time intake rocker piston hole promotes to stop that Piston Compression stops spring, when the back locating slot of active piston aligns with the locking plate end, the back locating slot that locking plate inserts active piston carries out spacing to active piston, at this moment main, inferior intake rocker is made as a whole two the intake valves generation on-off actions that make under the drive of main intake cam, promptly motor is finished from the conversion of single intake valve mode of operation to two intake valve mode of operations.When motor by the high speed high load during to the low speed and load change working, clutch mechanism is then finished according to the inverse process of above-mentioned action and is made motor from the conversion of two intake valves to single intake valve mode of operation.
The technique effect that the present invention obtains is: can be according to engine speed and load condition, motor is switched between single intake valve and two intake valve mode of operation, thereby help to improve power character, Economy and the emission performance of motorcycle in whole rotating speed and load condition scope.Whole apparatus structure is simple, arranges compactness, and is very little to the change of the former gazogene structure of motor.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is a structural representation of the present invention, also is the schematic representation of clutch mechanism when being in separated state.
Fig. 2 is the structural representation of clutch mechanism among the present invention.
Fig. 3 is the schematic representation when clutch mechanism is in bonding state among the present invention.
Fig. 4 is the structural representation of convexity wheel shaft 1 of the present invention.
Fig. 5 is the A-A sectional view of Fig. 3.
Fig. 6 is the B-B sectional view of Fig. 3.
Fig. 7 is the C-C sectional view of Fig. 3.
Fig. 8 is that the present invention is installed in the structural representation that cylinder covers.
Fig. 9 is the D-D sectional view of Fig. 8.
Figure 10 is the worm's eye view of Fig. 9.
Figure 11 is motor inlet and outlet method of operation schematic representation when being in single intake valve mode of operation.
Figure 12 is motor inlet and outlet method of operation schematic representation when being in two intake valve mode of operation.
Embodiment
As shown in figure 10, the three valve of indication of the present invention is meant an exhaust valve 18 and two intake valves 19 on engine cylinder cap 17.The present invention be directed to the improvement of existing three valve motorcycle engine air distributing device, its concrete structure is referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the main intake cam of an exhaust cam 7, one 2, an air inlet idle pulley 3 are arranged on camshaft 1, the molded lines of this air inlet idle pulley 3 is a full circle, and its diameter equals the base circle diameter (BCD) of main intake cam 2.Corresponding on the intake rocker axle 4 also have two intake rockers, and wherein contacted with main intake cam 2 is main intake rocker 5, and contacted with air inlet idle pulley 3 be inferior intake rocker 6.Leading, inferior intake rocker 5, be provided with between 6 by active piston 10, limit spring 11, switching piston 12, stop piston 13, stop the clutch mechanism that spring 14 and locking plate 15 constitute, wherein active piston 10, limit spring 11 and switching piston 12 are positioned at the piston hole of main intake rocker 5, limit spring 11 is between switching piston 12 and active piston 10, stop piston 13 and stop that spring 14 is positioned at the piston hole of time intake rocker 6, switching piston 12 contacts with stopping piston 13 outer ends, active piston 10, switching piston 12 and stop that the diameter of piston 13 is identical, before active piston 10 is provided with, back locating slot 10a, 10b, one end of locking plate 15 radially passes the piston hole sidewall of main intake rocker 5 and inserts among the prelocalization groove 10a or back locating slot 10b on the active piston 10, intake rocker axle 4 and main intake rocker 5 are provided with the oil duct 16 that is connected, and this oil duct 16 is connected with the inner bottom part of main intake rocker 5 piston holes.
Forward and backward locating slot 10a, 10b that Fig. 1, Fig. 2 and Fig. 3 illustrate on the active piston 10 are annular groove, make locking plate 15 ends carry out axially reliably spacing to two positions of active piston 10 in main intake rocker 5 piston holes.
Fig. 1, Fig. 3 also are illustrated on the camshaft 1, and air inlet idle pulley 3 is between exhaust cam 7 and main intake cam 2, and is simple in structure, easy to process.This device deployment scenarios such as Fig. 8, shown in Figure 9 on engine cylinder cap 17, whole device is arranged compact, it is very little to be applied on the small displacement motorcycle engine change to former machine.Label 8 is the exhaust rocker arm axle among Fig. 8, and 9 is exhaust rocker arm, and 20 is exhaust valve rod, and 21 is the intake valve bar; Label 22 is the air outlet flue on the motor among Fig. 8, Fig. 9, the 23rd, and intake duct.
Working principle: referring to Fig. 1, Fig. 3, when motor changes to high speed high load operating mode by low speed and load, oil duct feeds high-pressure oil for 16 li, if the point of contact of at this moment main intake rocker 5 and main intake cam 2 is not on the basic circle of main intake cam 2, piston hole decentraction between main intake rocker 5 and time intake rocker 6, active piston 10 segment distance that under the engine oil pressure effect, advances, make locking plate 15 leave the prelocalization groove 10a of active piston 10, but switching piston 12 can not enter in the piston hole of time intake rocker 6, and this moment is main, inferior intake rocker 5, remain separated from one another between 6.When the point of contact of main intake rocker 5 and main intake cam 2 is positioned on main intake cam 2 basic circles, main intake rocker 5 is concentric with the piston hole between time intake rocker 6, active piston 10 continues reach under the engine oil pressure effect and promotion switching piston 12 enters in the piston hole of time intake rocker 6, the switching piston 12 that enters in time intake rocker 6 piston holes promotes to stop that piston 13 compressions stop spring 14, when the back locating slot 10b of active piston 10 aligns with locking plate 15 ends, the back locating slot 10b that locking plate 15 inserts active piston 10 carries out spacing to active piston 10, at this moment main, inferior intake rocker 5,6 make as a whole two the intake valves generation on-off actions that make under the drive of main intake cam 2, promptly motor is finished from the conversion of single intake valve mode of operation (Figure 11) to two intake valve mode of operations (Figure 12).When motor by at a high speed, high load is during to low speed, running on the lower load conversion, clutch mechanism is then finished according to the inverse process of above-mentioned action and is made motor from the conversion of two intake valves to single intake valve mode of operation.
Claims (3)
1. three air valve motorcycle motor variable air inlet valve air distribution device, comprise camshaft (1) and intake rocker axle (4), it is characterized in that: an exhaust cam (7), a main intake cam (2) and an air inlet idle pulley (3) are arranged on described camshaft (1), the molded lines of this air inlet idle pulley (3) is a full circle, its diameter equals the base circle diameter (BCD) of main intake cam (2), and air inlet idle pulley (3) is positioned between exhaust cam (7) and the main intake cam (2); Two intake rockers are installed on intake rocker axle (4) accordingly, wherein contacted with main intake cam (2) is main intake rocker (5), contacted with air inlet idle pulley (3) is time intake rocker (6), is provided with clutch mechanism between primary and secondary intake rocker (5,6); By main intake cam (2), air inlet idle pulley (3), main intake rocker (5) and time intake rocker (6) and clutch mechanism, motor can run on single air inlet mode of operation and two air inlet mode of operation.
2. three air valve motorcycle motor variable air inlet valve air distribution device according to claim 1, it is characterized in that: described master, inferior intake rocker (5,6) clutch mechanism between is by active piston (10), limit spring (11), switching piston (12), stop piston (13), stop that spring (14) and locking plate (15) constitute, active piston (10) wherein, limit spring (11) and switching piston (12) are positioned at the piston hole of main intake rocker (5), limit spring (11) is positioned between switching piston (12) and the active piston (10), stop piston (13) and stop that spring (14) is positioned at the piston hole of time intake rocker (6), switching piston (12) contacts with stopping piston (13) outer end, active piston (10), switching piston (12) and stop that the external diameter of piston (13) is identical, before active piston (10) is provided with, back locating slot (10a, 10b), one end of locking plate (15) radially passes the piston hole sidewall of main intake rocker (5) and inserts in the prelocalization groove (10a) or back locating slot (10b) on the active piston (10), intake rocker axle (4) and main intake rocker (5) are provided with the oil duct (16) that is connected, and this oil duct (16) is connected with the inner bottom part of main intake rocker (5) piston hole.
3. three air valve motorcycle motor variable air inlet valve air distribution device according to claim 2 is characterized in that: the forward and backward locating slot on the described active piston (10) (10a, 10b) is an annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100545649A CN100419223C (en) | 2006-11-03 | 2006-11-03 | Three air valve motorcycle motor variable air inlet valve air distribution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100545649A CN100419223C (en) | 2006-11-03 | 2006-11-03 | Three air valve motorcycle motor variable air inlet valve air distribution device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1948721A CN1948721A (en) | 2007-04-18 |
| CN100419223C true CN100419223C (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100545649A Expired - Fee Related CN100419223C (en) | 2006-11-03 | 2006-11-03 | Three air valve motorcycle motor variable air inlet valve air distribution device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8550047B2 (en) * | 2009-06-09 | 2013-10-08 | Honda Motor Co., Ltd. | Valve control apparatus for internal combustion engine |
| CN102069371A (en) * | 2010-12-29 | 2011-05-25 | 尹贤海 | Automatic assembling machine of locking clip spring seat |
| CN102071982B (en) * | 2011-02-21 | 2013-05-15 | 山东大学 | Mobile rocker arm shaft type variable valve timing mechanism |
| CN113931712B (en) * | 2021-09-30 | 2023-06-02 | 东风商用车有限公司 | Rocker arm assembly with variable valve lift |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721880Y (en) * | 2004-07-09 | 2005-08-31 | 重庆大学 | Variable distributing timing mechanism of single overhead axial cam for motorcycle motor |
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- 2006-11-03 CN CNB2006100545649A patent/CN100419223C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721880Y (en) * | 2004-07-09 | 2005-08-31 | 重庆大学 | Variable distributing timing mechanism of single overhead axial cam for motorcycle motor |
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| CN1948721A (en) | 2007-04-18 |
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Granted publication date: 20080917 Termination date: 20121103 |