CN2890346Y - Gas distribution cam for internal combustion engine and cylinder therefor - Google Patents
Gas distribution cam for internal combustion engine and cylinder therefor Download PDFInfo
- Publication number
- CN2890346Y CN2890346Y CN 200520123933 CN200520123933U CN2890346Y CN 2890346 Y CN2890346 Y CN 2890346Y CN 200520123933 CN200520123933 CN 200520123933 CN 200520123933 U CN200520123933 U CN 200520123933U CN 2890346 Y CN2890346 Y CN 2890346Y
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- dead center
- cam
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- exhaust
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Abstract
The utility model pertains to a gas distribution cam for internal combustion engine and cylinder. An exhaust valve opening control flange is arranged on the exhaust cam from section before 16 degrees of the lower dead center to section before 28 degrees of the upper dead center, wherein section after 16 degrees of the lower dead center to section before 28 degrees of the upper dead center is a flange steeple section, and an exhaust valve closing control groove is arranged at section from before 28 degrees of the upper dead center to section after 12 degrees of the upper dead center, wherein section after 12 degrees of the upper dead center is the depressed center of the groove. The volume of the cylinder corresponding with the exhaust cam is 1.25 to 1.35 times of the original specification. An inlet valve opening control flange is arranged on the inlet cam from section before 12 degrees of the upper dead center to the upper dead center, wherein section after 28 degrees of the upper dead center to the upper dead center is a flange steeple section. an inlet valve closing control groove is arranged at section from the lower dead center to after 90 degrees of the lower dead center, wherein section from after 32 degrees of the lower dead center and after 90 degrees of the lower dead center is the depressed center of the groove. The utility model has distinct advantages of markedly improving engine power performance and efficiency and reducing fuel consumption and exhaust noise on the basis of not increasing fuel.
Description
Technical field
The utility model belongs to the air distributing device of internal-combustion engine, particularly relates to the one one kinds of valve cams and the pairing cylinder barrel thereof of internal-combustion engine.
Background technique
In the known technology, it is Before Bottom Dead Center between 12 ° of the 55 °～atdc that its exhaust cam of the internal-combustion engine of underlying distribution cam axle makes the exhaust distribution angular region of exhaust valve actuation, it is in 12 ° of budc～after bottom dead center between 38 ° that intake cam makes the air inlet distribution angular region of intake valve action, and wherein the control angle of complete opening is 115 ° of atdc.
The profile molded lines shape relation of IC engine gas distribution cam is to power, oil consumption and the exhaust sound of internal-combustion engine, the major defect that above-mentioned IC engine gas distribution cam exists shows that the exhauxt valve opens time is too early, the unlatching back is longer to the transient time of complete opening, but therefore will lose the energy of part work done.Cause running noises also bigger greatly because of exhaust pressure simultaneously.
Summary of the invention
The utility model be for solve in the known technology because of the IC engine gas distribution cam make the exhauxt valve opens time too early, open the back to long energy loss and the bigger technical problem of running noises that the produces transient time of complete opening, and a kind of a kind of valve cam and pairing cylinder barrel thereof that can overcome the internal-combustion engine of above-mentioned defective proposed.
The utility model is taked following technological scheme for solving the problems of the technologies described above: in the valve cam exhaust cam be provided with from before bottom dead center 16 ° to the preceding 28 ° exhauxt valve opens of top dead center control flange, wherein after bottom dead center 16 ° to top dead center preceding 28 ° be flange pinnacle section, 28 ° of budc to the top dead center 12 ° be provided with exhaust valve closing control groove, wherein atdc is the concave bottom of this groove for 12 °, and its volume of the cylinder barrel of described exhaust cam correspondence is 1.25～1.35 times of former specification; Intake cam is provided with from 12 ° of IO Intake Valve Opens control flanges to lower dead center of budc, wherein 28 ° of atdc to lower dead center is a flange pinnacle section, lower dead center to after bottom dead center 90 ° be provided with IC Intake Valve Closes control groove, 32 ° of concave bottoms that this groove is set to 90 ° of scopes after bottom dead center after bottom dead center wherein.
The utility model can also be taked following technical measures:
The increase that its volume of the cylinder barrel of described exhaust cam correspondence is 1.25～1.35 times is relative the dwindling in pairing firing chamber, and dwindling of combustion chamber volume is 0.9～0.75 times of former specification.
Described valve cam, its valve actuating push rod is provided with the roller that engages with the cam outer rim.
The beneficial effects of the utility model and advantage: exhaust cam of the present utility model make the exhauxt valve opens time by before bottom dead center 55 ° change to 16 ° before bottom dead center, can increase the power done time of combustion mixture body, reduce the loss of deflagration pressure, reduce exhaust pressure.Intake cam makes the intake valve complete opening time change to 28 ° of atdc by 115 ° of atdc, makes air inlet unobstructed.The time that intake cam also can make IC Intake Valve Closes after bottom dead center 32 ° to being provided with in 90 ° of scopes after bottom dead center, so that guarantee that the cylinder barrel volume increases or combustion chamber volume is dwindled desired normal compression ratio and air displacement.The utlity model has and under the prerequisite that does not increase fuel oil, obviously improve combustion engine powered property and working efficiency and reduce oil consumption and the outstanding advantage of reduction exhaust sound.
Description of drawings
Accompanying drawing 1 the utility model exhaust cam valve timing diagram.
Accompanying drawing 2 the utility model intake cam valve timing diagrams.
Exhaust cam structural representation during accompanying drawing 3 top dead center positions.
Intake cam structural representation during accompanying drawing 4 top dead center positions.
Number in the figure: 1 exhaust cam, 2 exhaust valve putters, 3 rollers, 4 intake cams, 5 intake valve push rods.
Embodiment
Further specify the utility model below in conjunction with embodiment and accompanying drawing thereof.
As shown in Figure 1, exhaust cam be provided with from before bottom dead center 16 ° to the preceding 28 ° exhauxt valve opens of top dead center control flange, wherein after bottom dead center 16 ° to top dead center preceding 28 ° be flange pinnacle section, 28 ° of budc to the top dead center 12 ° be provided with exhaust valve closing control groove, wherein atdc is the concave bottom of this groove for 12 °, and its volume of the cylinder barrel of described exhaust cam correspondence is 1.25～1.35 times of former specification.Also can be solved in the mode of dwindling combustion chamber volume under the situation that keeps the cylinder barrel constancy of volume, dwindling of combustion chamber volume is 0.9～0.75 times of former specification.
Because the velocity ratio of timing gear is 2: 1 in quartastroke engine, therefore, exhaust cam valve timing diagram shown in Figure 1 is 2: 1 with the angle ratio of actual exhaust air cam shown in Figure 3.
Among Fig. 3, exhaust cam 1 Before Bottom Dead Center 8 ° be provided with exhauxt valve opens control flange for preceding 14 ° to top dead center, wherein after bottom dead center 8 ° to top dead center preceding 14 ° be flange pinnacle section, 14 ° of budc to the top dead center 6 ° be provided with exhaust valve closing control groove, wherein atdc is the concave bottom of this groove for 6 °.Among Fig. 3, exhaust valve putter 2 is provided with the roller 3 that engages with exhaust cam 1 outer rim.
As shown in Figure 2, intake cam is provided with from 12 ° of IO Intake Valve Opens control flanges to lower dead center of budc, wherein 28 ° of atdc to lower dead center is a flange pinnacle section, lower dead center to after bottom dead center 90 ° be provided with IC Intake Valve Closes control groove, 32 ° of concave bottoms that this groove is set to 90 ° of scopes after bottom dead center after bottom dead center wherein.
Because the velocity ratio of timing gear is 2: 1 in quartastroke engine, therefore, intake cam valve timing diagram shown in Figure 2 is 2: 1 with the angle ratio of actual intake cam shown in Figure 4.
Among Fig. 4, intake cam 4 top dead center position preceding 6 ° to the top dead center position 90 ° be provided with IO Intake Valve Opens control flange, wherein behind top dead center position 14 ° to 90 ° be that lower dead center is a flange pinnacle section, lower dead center to after bottom dead center 45 ° be provided with IC Intake Valve Closes control groove, 16 ° of concave bottoms that this groove is set to 45 ° of scopes after bottom dead center after bottom dead center wherein.Among Fig. 4, intake valve push rod 5 is provided with the roller 3 that engages with intake cam 4 outer rims.
Shown in Fig. 3 solid line and the dotted portion is two embodiments that concave bottom is provided with the position, i.e. 45 ° after bottom dead center shown in 16 ° and the dotted line after bottom dead center shown in the solid line are so that guarantee desired normal compression ratio of cylinder barrel and air displacement after volume increases.
The concave bottom of IC Intake Valve Closes control groove can after bottom dead center 16 ° to selecting in 45 ° of scopes after bottom dead center, in order to the multiple that cooperates multiple that different cylinder barrel volumes increase or combustion chamber volume to reduce.The cylinder barrel volume near its concave bottom position of the upper limit that increases the multiple scope the closer to 45 ° after bottom dead center, otherwise opposite.
Claims (2)
1, a kind of valve cam of internal-combustion engine and pairing cylinder barrel thereof, it is characterized in that: exhaust cam be provided with from before bottom dead center 16 ° to the preceding 28 ° exhauxt valve opens of top dead center control flange, wherein after bottom dead center 16 ° to top dead center preceding 28 ° be flange pinnacle section, 28 ° of budc to the top dead center 12 ° be provided with exhaust valve closing control groove, wherein atdc is the concave bottom of this groove for 12 °, and its volume of the cylinder barrel of described exhaust cam correspondence is 1.25～1.35 times of former specification; Intake cam is provided with from 12 ° of IO Intake Valve Opens control flanges to lower dead center of budc, wherein 28 ° of atdc to lower dead center is a flange pinnacle section, lower dead center to after bottom dead center 90 ° be provided with IC Intake Valve Closes control groove, 32 ° of concave bottoms that this groove is set to 90 ° of scopes after bottom dead center after bottom dead center wherein.
2, according to described valve cam of claim 1 and pairing cylinder barrel thereof, it is characterized in that: described valve cam, its valve actuating push rod is provided with the roller that engages with the cam outer rim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520123933 CN2890346Y (en) | 2005-12-13 | 2005-12-13 | Gas distribution cam for internal combustion engine and cylinder therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520123933 CN2890346Y (en) | 2005-12-13 | 2005-12-13 | Gas distribution cam for internal combustion engine and cylinder therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2890346Y true CN2890346Y (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520123933 Expired - Fee Related CN2890346Y (en) | 2005-12-13 | 2005-12-13 | Gas distribution cam for internal combustion engine and cylinder therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2890346Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046980A (en) * | 2011-10-17 | 2013-04-17 | 铃木株式会社 | Valve mechanism of engine |
| CN103075219A (en) * | 2013-01-16 | 2013-05-01 | 卢章根 | Engine structure for improving protrusion angle of air inlet camshaft |
-
2005
- 2005-12-13 CN CN 200520123933 patent/CN2890346Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046980A (en) * | 2011-10-17 | 2013-04-17 | 铃木株式会社 | Valve mechanism of engine |
| CN103075219A (en) * | 2013-01-16 | 2013-05-01 | 卢章根 | Engine structure for improving protrusion angle of air inlet camshaft |
| CN103075219B (en) * | 2013-01-16 | 2015-12-23 | 卢章根 | A kind of engine structure changing the protrusion angle of admission cam shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |