CN103291417A - Engine respiratory system arranged on crankcase - Google Patents
Engine respiratory system arranged on crankcase Download PDFInfo
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- CN103291417A CN103291417A CN2013102638991A CN201310263899A CN103291417A CN 103291417 A CN103291417 A CN 103291417A CN 2013102638991 A CN2013102638991 A CN 2013102638991A CN 201310263899 A CN201310263899 A CN 201310263899A CN 103291417 A CN103291417 A CN 103291417A
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- oil
- crankcase
- mounting hole
- gas separation
- crankcase body
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Abstract
The invention discloses an engine respiratory system arranged on a crankcase. A crank mounting hole (1) and a balance shaft mounting hole (2) are formed in the crankcase, an isolating cavity which semi-covers the left side of the balance shaft mounting hole is formed in the inner side of the crankcase, the isolating cavity extends from the top of the crankcase to the bottom of the crankcase along the left side wall of the crankcase, baffles (4) are disposed in the isolating cavity and divide the isolating cavity into an oil-gas separation front cavity (5), an oil-gas separation back cavity (6) and an oil return cavity (7) which are sequentially connected from top to bottom, an exhaust nozzle (8) communicated with the oil-gas separation back cavity is arranged at the top of the crankcase, a notch (4a) communicated with two adjacent cavities is formed in each baffle, an oil return port (7a) is arranged at the bottom of the oil return cavity, and the eccentric distance e which is larger than zero exists between the crank mounting hole and the central line (9) of a cylinder mounting hole. The engine respiratory system is matched with a corresponding right crankcase, and the problems of extra-high pressure in the crankcase, poor oil-gas separation and large lateral pressure of a piston during operation of an engine are solved.
Description
Technical field
The present invention relates to technical field of engines, specifically, is a kind of motor respiratory system that is arranged on the crankcase body, belongs to the mechanical structure technical field.
Background technique
Crankcase body is one of requisite component on the motor, and left crankcase and right crankcase snap together and constituted the engine crankshaft casing by the locking of mould assembling bolt.Crankcase body is provided with crank mounting hole, trunnion shaft mounting hole and cylinder attachment face etc., and usually, the trunnion shaft mounting hole site is in the upper left side of crank mounting hole.The subject matter that exists is: be in sealing state in the casing, overpressure, unbalanced phenomenon often occur, simultaneously, Oil-gas Separation is bad, causes the engine motor oil consumption big, and exhaust emission is big.
Summary of the invention
After the present invention is intended to solve left crankcase and right crankcase mould assembling, during engine operation, a series of problems such as the casing internal pressure is too high, Oil-gas Separation is bad, and the crankcase pressure that brings is unbalance, oil consumption is big, exhaust emission is serious.
For this reason, the technical solution adopted in the present invention is: a kind of motor respiratory system that is arranged on the crankcase body, described crankcase body is fastened by left crankcase (1) and right crankcase (2) and forms, described crankcase body is provided with crank mounting hole (3) and trunnion shaft mounting hole (4), described trunnion shaft mounting hole (4) is positioned at the left side of crank mounting hole (3), key is: be provided with the separate cavities that partly wraps in trunnion shaft mounting hole (4) left side in described crankcase body, described separate cavities is from the top of crankcase body, extends downwardly into bottom half along the left side wall of crankcase body; Be provided with dividing plate (5) in the described separate cavities, separate cavities is divided into Oil-gas Separation ante-chamber (6), Oil-gas Separation back cavity (7) and the oil back chamber (8) that links to each other successively from top to bottom, and described Oil-gas Separation ante-chamber (6), Oil-gas Separation back cavity (7) and oil back chamber (8) are formed by left crankcase (1) and right crankcase (2) fastening respectively; Described crankcase body sidewall is provided with the inlet hole (9) that communicates with Oil-gas Separation ante-chamber (6), described crankcase body top is provided with the exhaust nozzle (10) that communicates with Oil-gas Separation back cavity (7), each dividing plate (5) is provided with the breach (5a) that is communicated with adjacent two cavitys, and the bottom, right side of described oil back chamber (8) is provided with return opening (8a).
Left and right crankcases snaps together and constitutes Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber totally three cavitys independently, and the dividing plate between the adjacent cavity is provided with breach, make each independently cavity be interconnected again.Inlet hole is communicated with crankcase, and exhaust nozzle is communicated with atmosphere, and return opening directly is communicated with oil sump and return opening is positioned at below the oil sump pasta.Finally, constituted a complete respiratory system by inlet hole, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber, exhaust nozzle.Dividing plate between Oil-gas Separation ante-chamber and the Oil-gas Separation back cavity plays the effect of Oil-gas Separation, gas after the separation is discharged through exhaust nozzle, prevented the overpressure in the crankcase body, machine oil after the separation flows to oil back chamber through the Oil-gas Separation back cavity, the right side, bottom of oil back chamber is provided with return opening, in the oil sump in the return opening inflow crankcase body, machine oil is carried out recycling.
Be preferably, described inlet hole (9) is arranged on the right crankcase (2), and exhaust nozzle (10) is arranged on the left crankcase (1).
Described Oil-gas Separation ante-chamber (6) and Oil-gas Separation back cavity (7) are positioned at the top of trunnion shaft mounting hole (4), oil back chamber (8) is from the downside of Oil-gas Separation back cavity (7), left side wall along casing extends downwardly into bottom half, and described trunnion shaft mounting hole (4) is positioned on the same horizontal line with the axis of crank mounting hole (3).Because Oil-gas Separation ante-chamber and Oil-gas Separation back cavity have taken the space of casing upper left quarter, therefore, the trunnion shaft mounting hole are moved down layout, best and crank mounting hole is on the same horizontal line.
Be provided with cylinder attachment face (16) at described crankcase body top, have eccentric distance e between described crank mounting hole (3) and the cylinder centerline (11), and e＞0.Crank is designed to eccentric structure, to reduce the side pressure of piston, mentions the reliability of engine operation.
Except the periphery of crankcase body is provided with outside the mould assembling bolt hole (12), mould assembling bolt hole (13) in crankcase body, also being provided with, described in mould assembling bolt hole (13) be arranged on the rib that crankcase body extends internally.By mould assembling bolt in increasing around crankshaft cavity, thereby the rigidity of raising motor reaches the purpose that reduces engine noise.
Described right crankcase (2) is provided with oil pump mounting hole (14), and described oil pump mounting hole (14) is positioned at the below of trunnion shaft mounting hole (4), is provided with the oil inlet hole (15) that communicates with oil pump mounting hole (14) at bottom half.Usually, oil pump is to be installed on the motor as independent parts, is made up of the pump housing, oil pump cover, internal rotor, external rotor, oil pump shaft, and oil pump need arrange the pump housing separately, and offers oil inlet hole and oil outlet at the pump housing, the manufacture cost height.This structure is incorporated into the function of oil pump on the right crankcase, uses right crankcase and installs as the pump housing of oil pump, makes oil pump develop into split-type structural from traditional monolithic construction.Internal rotor in the split type oil pump, external rotor, oil pump shaft and traditional oil pump part are general, and do not need to arrange separately the pump housing, are guaranteeing to have reduced the manufacture cost of oil pump under the prerequisite that the pump functional oil is realized.
Beneficial effect of the present invention:
(1) set up the motor respiratory system that is constituted by inlet hole, Oil-gas Separation ante-chamber, Oil-gas Separation back cavity, oil back chamber and exhaust nozzle at crankcase body, effectively avoided occurring in the casing phenomenon of overpressure, simultaneously, the energy separation oil and gas, reduce the oil consumption of motor, reduce air pollution emission;
(2) there are eccentric distance in crank mounting hole and cylinder centerline, make the eccentric installation of crank, to reduce the side pressure of piston, improve engine reliability;
(3) by mould assembling bolt in around crankshaft cavity, increasing, combine the rigidity that improves motor with outer mould assembling bolt, reach the purpose that reduces engine noise;
(4) use right crankcase and install as the pump housing of oil pump, make oil pump develop into split-type structural from traditional monolithic construction, reduced the manufacture cost of oil pump.
Description of drawings
Fig. 1 is perspective view of the present invention (from a side of right crankcase).
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the structural representation (from the inboard) of left crankcase.
Fig. 4 is the B-B sectional view of Fig. 3.
Fig. 5 is the structural representation (from the inboard) of right crankcase.
Fig. 6 is the rear view of Fig. 5.
Fig. 7 is the C-C sectional view of Fig. 5.
Fig. 8 is the D-D sectional view of Fig. 5.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Be the perspective view of crankcase body as shown in Figure 1 and Figure 2, by dotting among the left crankcase 1(figure) and right crankcase 2(figure in represent with solid line) fasten and to form.Crankcase body is provided with crank mounting hole 3 and trunnion shaft mounting hole 4, and trunnion shaft mounting hole 4 is positioned at the left side of crank mounting hole 3.
Be provided with the separate cavities that partly wraps in trunnion shaft mounting hole 4 left sides in crankcase body, separate cavities is from the top of crankcase body, extends downwardly into bottom half along the left side wall of crankcase body.For vacating space is arranged separate cavities, trunnion shaft mounting hole 4 relative conventional construction when arranging moves down.Be provided with two dividing plates 5 in the separate cavities, separate cavities is divided into Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7 and the oil back chamber 8 that links to each other successively from top to bottom, and Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7 and oil back chamber 8 are formed by left crankcase 1 and right crankcase 2 fastenings respectively.The crankcase body sidewall is provided with the inlet hole 9 that communicates with Oil-gas Separation ante-chamber 6.The crankcase body top is provided with the exhaust nozzle 10 that communicates with Oil-gas Separation back cavity 7, and each dividing plate 5 is provided with the breach 5a that is communicated with adjacent two cavitys, and the bottom, right side of oil back chamber 8 is provided with return opening 8a.
As shown in Figure 1, Oil-gas Separation ante-chamber 6 and Oil-gas Separation back cavity 7 preferably are positioned at the top of trunnion shaft mounting hole 4, oil back chamber 8 is from the downside of Oil-gas Separation back cavity 7, left side wall along casing extends downwardly into bottom half, and trunnion shaft mounting hole 4 is positioned on the same horizontal line with the axis of crank mounting hole 3.
In conjunction with Fig. 1, shown in Figure 2, be provided with cylinder attachment face 16 at the crankcase body top, there is eccentric distance e between crank mounting hole 3 and the cylinder centerline 11, and e＞0.Preferably, the eccentric distance e=3mm between crank mounting hole 3 and the cylinder mounting holes center line 11.
As shown in Figure 3, left crankcase 1 is provided with Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7 and oil back chamber 8, and these three cavitys open wide near a side of right crankcase 2 so that and right crankcase snap together and just constitute single independently cavity.Separate by dividing plate 5 between adjacent two cavitys, totally 2 dividing plates 5, breach 5a both can be arranged on the dividing plate 5 of left crankcase 1, also can be arranged on the dividing plate 5 of right crankcase 2, and return opening 8a is preferably disposed on the left crankcase 1.Exhaust nozzle 10 is preferably disposed on the left crankcase 1, and exhaust nozzle 10 communicates with atmosphere.
In conjunction with Fig. 5---shown in Figure 6, right crankcase 2 is provided with Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7 and oil back chamber 8, and these three cavitys open wide near a side of left crankcase 1, so that and left crankcase snaps together and just constitute single independently cavity, adjacently separate by dividing plate 5.Inlet hole 9 is arranged on the right crankcase 2, the axis normal of the axis of inlet hole 9 and trunnion shaft mounting hole 4.In conjunction with Fig. 6, shown in Figure 8, right crankcase 2 is provided with oil pump mounting hole 14, and oil pump mounting hole 14 is positioned at the below of trunnion shaft mounting hole 4, is provided with the oil inlet hole 15 that communicates with oil pump mounting hole 14 at bottom half.In casing, be provided with oil leab 16 and plug 17.
In conjunction with Fig. 3, shown in Figure 5, except the periphery of crankcase body is provided with outside the mould assembling bolt hole 12, mould assembling bolt hole 13 in also being provided with in crankcase body, interior mould assembling bolt hole 13 are arranged on the rib that crankcase body extends internally.The quantity of interior mould assembling bolt hole 11 arranges as required, is preferably three, is looped around the distribution triangular in shape on every side of crankshaft cavity.
As Fig. 4 and shown in Figure 7, in left and right crankcase 1,2 crank mounting hole 3, bearing hole mold insert 19 is housed respectively.
Structural principle and working procedure: left and right crankcase snaps together and constitutes Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7, oil back chamber 8 totally three cavitys independently.Constituted a complete motor respiratory system by inlet hole 9, Oil-gas Separation ante-chamber 6, Oil-gas Separation back cavity 7, oil back chamber 8, exhaust nozzle 10, dividing plate 5 between Oil-gas Separation ante-chamber 6 and the Oil-gas Separation back cavity 7 plays the effect of Oil-gas Separation, gas after the separation is discharged through exhaust nozzle 10, prevented the overpressure in the crankcase body, machine oil after the separation flows to oil back chamber 8 through Oil-gas Separation back cavity 7, in the oil sump 18 in the return opening 8a inflow crankcase body.Inlet hole 9 is communicated with crankcase, and exhaust nozzle 10 is communicated with atmosphere, and oil back chamber 8 directly is communicated with oil sump and return opening 8a and is positioned at the oil sump pasta below 18, can prevent effectively that the oil gas in the crankcase from reentering the motor respiratory system through return opening 8a.
Claims (6)
1. motor respiratory system that is arranged on the crankcase body, described crankcase body is fastened by left crankcase (1) and right crankcase (2) and forms, described crankcase body is provided with crank mounting hole (3) and trunnion shaft mounting hole (4), described trunnion shaft mounting hole (4) is positioned at the left side of crank mounting hole (3), it is characterized in that: in described crankcase body, be provided with the separate cavities that partly wraps in trunnion shaft mounting hole (4) left side, described separate cavities is from the top of crankcase body, extends downwardly into bottom half along the left side wall of crankcase body; Be provided with dividing plate (5) in the described separate cavities, separate cavities is divided into Oil-gas Separation ante-chamber (6), Oil-gas Separation back cavity (7) and the oil back chamber (8) that links to each other successively from top to bottom, and described Oil-gas Separation ante-chamber (6), Oil-gas Separation back cavity (7) and oil back chamber (8) are formed by left crankcase (1) and right crankcase (2) fastening respectively; Described crankcase body sidewall is provided with the inlet hole (9) that communicates with Oil-gas Separation ante-chamber (6), described crankcase body top is provided with the exhaust nozzle (10) that communicates with Oil-gas Separation back cavity (7), each dividing plate (5) is provided with the breach (5a) that is communicated with adjacent two cavitys, and the bottom, right side of described oil back chamber (8) is provided with return opening (8a).
2. according to the described motor respiratory system that is arranged on the crankcase body of claim 1, it is characterized in that: described inlet hole (9) is arranged on the right crankcase (2), and exhaust nozzle (10) is arranged on the left crankcase (1).
3. according to the described motor respiratory system that is arranged on the crankcase body of claim 2, it is characterized in that: described Oil-gas Separation ante-chamber (6) and Oil-gas Separation back cavity (7) are positioned at the top of trunnion shaft mounting hole (4), oil back chamber (8) is from the downside of Oil-gas Separation back cavity (7), left side wall along casing extends downwardly into bottom half, and described trunnion shaft mounting hole (4) is positioned on the same horizontal line with the axis of crank mounting hole (3).
4. according to claim 1 or the 2 described motor respiratory systems that are arranged on the crankcase body, it is characterized in that: be provided with cylinder attachment face (16) at described crankcase body top, there is eccentric distance e between described crank mounting hole (3) and the cylinder centerline (11), and e＞0.
5. according to claim 1 or the 2 described motor respiratory systems that are arranged on the crankcase body, it is characterized in that: except the periphery of crankcase body is provided with outside the mould assembling bolt hole (12), mould assembling bolt hole (13) in crankcase body, also being provided with, described in mould assembling bolt hole (13) be arranged on the rib that crankcase body extends internally.
6. according to claim 1 or the 2 described motor respiratory systems that are arranged on the crankcase body, it is characterized in that: described right crankcase (2) is provided with oil pump mounting hole (14), described oil pump mounting hole (14) is positioned at the below of trunnion shaft mounting hole (4), is provided with the oil inlet hole (15) that communicates with oil pump mounting hole (14) at bottom half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310263899.1A CN103291417B (en) | 2013-06-28 | 2013-06-28 | Be arranged on the engine breathing system on crankcase body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310263899.1A CN103291417B (en) | 2013-06-28 | 2013-06-28 | Be arranged on the engine breathing system on crankcase body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291417A true CN103291417A (en) | 2013-09-11 |
| CN103291417B CN103291417B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310263899.1A Active CN103291417B (en) | 2013-06-28 | 2013-06-28 | Be arranged on the engine breathing system on crankcase body |
Country Status (1)
| Country | Link |
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| CN (1) | CN103291417B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03175110A (en) * | 1989-12-04 | 1991-07-30 | Suzuki Motor Corp | Breath device of internal combustion engine |
| CN201202512Y (en) * | 2008-05-27 | 2009-03-04 | 隆鑫工业有限公司 | Oil-gas separating device of engine crankcase waste gases |
| CN201232577Y (en) * | 2008-05-30 | 2009-05-06 | 隆鑫工业有限公司 | Oil gas separating structure for exhaust gas of engine crankcase |
| JP4511865B2 (en) * | 2004-04-05 | 2010-07-28 | 富士重工業株式会社 | Engine breather equipment |
| CN201614990U (en) * | 2009-12-28 | 2010-10-27 | 重庆路沃发动机有限公司 | Crankcase of motorcycle engine |
| US8061336B2 (en) * | 2005-12-28 | 2011-11-22 | Toyota Jidosha Kabushiki Kaisha | PCV system for V-type engine |
| CN202300694U (en) * | 2011-09-09 | 2012-07-04 | 江门王野摩托车制造有限公司 | Waste gas separation structure in crank shaft box body |
| CN203383878U (en) * | 2013-06-28 | 2014-01-08 | 力帆实业(集团)股份有限公司 | Motorcycle engine respiratory system |
-
2013
- 2013-06-28 CN CN201310263899.1A patent/CN103291417B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03175110A (en) * | 1989-12-04 | 1991-07-30 | Suzuki Motor Corp | Breath device of internal combustion engine |
| JP4511865B2 (en) * | 2004-04-05 | 2010-07-28 | 富士重工業株式会社 | Engine breather equipment |
| US8061336B2 (en) * | 2005-12-28 | 2011-11-22 | Toyota Jidosha Kabushiki Kaisha | PCV system for V-type engine |
| CN201202512Y (en) * | 2008-05-27 | 2009-03-04 | 隆鑫工业有限公司 | Oil-gas separating device of engine crankcase waste gases |
| CN201232577Y (en) * | 2008-05-30 | 2009-05-06 | 隆鑫工业有限公司 | Oil gas separating structure for exhaust gas of engine crankcase |
| CN201614990U (en) * | 2009-12-28 | 2010-10-27 | 重庆路沃发动机有限公司 | Crankcase of motorcycle engine |
| CN202300694U (en) * | 2011-09-09 | 2012-07-04 | 江门王野摩托车制造有限公司 | Waste gas separation structure in crank shaft box body |
| CN203383878U (en) * | 2013-06-28 | 2014-01-08 | 力帆实业(集团)股份有限公司 | Motorcycle engine respiratory system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103291417B (en) | 2015-09-30 |
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