CN103174540A - Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve - Google Patents
Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve Download PDFInfo
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- CN103174540A CN103174540A CN2013100952679A CN201310095267A CN103174540A CN 103174540 A CN103174540 A CN 103174540A CN 2013100952679 A CN2013100952679 A CN 2013100952679A CN 201310095267 A CN201310095267 A CN 201310095267A CN 103174540 A CN103174540 A CN 103174540A
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Abstract
The invention discloses a lubrication system of a piston ring of an internal-combustion engine and an upper portion scraper ring of an adjacent cylinder sleeve. The lubrication system comprises a cylinder body of an opposed piston opposed cylinder engine. The cylinder body is provided with an outer piston and an inner piston. At least one piston ring is arranged on the top of the outer piston. The scraper ring is arranged under the piston ring and used for scraping off lubricating oil at the lower portion of the cylinder body, and the scraped lubricating oil is transmitted to the upper portion of the cylinder body. The scraper ring is provided with an oil storage tank used for storing the scraped lubricating oil. When the outer piston and the inner piston reach an upper dead center in an operating cycle, the lubricating oil is left from the oil storage tank under the effect of piston deceleration, and certain amount of the lubricating oil enters the inner surface of the upper portion of the cylinder body. Due to the fact that the piston scraper ring is arranged on the top of the piston, engine oil left on the cylinder wall below an air inlet of a cylinder is collected by the scraper ring and the engine oil is transmitted to the cylinder wall close to a combustor.
Description
Technical field
The present invention relates to a kind of technical field of internal-combustion engine, when relating in particular to piston when two stroke engine near top dead center, a kind of is the technical field of the lubrication system of upper piston ring and cylinder liner top scraper ring supplying lubricating oil.
Background technique
Traditional combustion engine leans against in work cycle piston ring and takes away the machine oil that is splashed on cylinder wall or cylinder liner and lubricate.
At some two stroke engine, as " have single bent axle, and have opposed cylinder, opposed piston (OPOC) motor ", lubricant oil arrives wrist pin by the oil duct of crankshaft-and-connecting-rod.Usually the machine oil of crankcase is splashed on casing wall below piston ring with the lubricating cylinder wall.In such lubrication system, when piston during from lower dead center (BDC) to top dead center (TDC), piston ring is during by this zone and take away lubricant oil.In each process, there is a small amount of machine oil can enter relief opening and the suction port of cylinder.
When being applied to two stroke engine, this lubrication system needs to improve.Because if the machine oil on cylinder liner is too many, piston ring can be taken away more machine oil and enter scavenging port and firing chamber.Such result causes machine oil to enter relief opening causing automobile engine tail gas (HC) discharging.In addition, when machine oil passed through suction port, some machine oil can be brought into the firing chamber, may change combustion process like this.On the contrary, if there is no enough machine oil on piston ring, can cause the wearing and tearing aggravation.
Comprised a little oil storage pool in piston, when piston during in lower dead center oil storage pool be injected into machine oil, when piston carries out compression stroke near top dead center, utilize the inertial force of piston, eject in oil storage pool that appropriate machine oil enters cylinder wall and near the zone between the piston ring of piston top bottom.This injection makes lubricant oil can effectively lubricate piston ring in suction port and the motion of relief opening top, and makes the oil level that is ejected on cylinder wall in control.
Summary of the invention
The object of the present invention is to provide a kind of top scraper ring lubrication system of piston ring and adjacent cylinder cover of internal-combustion engine, if too many to solve in existing two stroke engine the machine oil on cylinder liner, piston ring can be taken away more machine oil and enter scavenging port and firing chamber, causes machine oil to enter relief opening and causes automobile engine tail gas (HC) discharging.And when machine oil passed through suction port, some machine oil can be brought into the firing chamber, may change combustion process like this.Simultaneously, if there is no enough machine oil on piston ring, can cause the problem of wearing and tearing aggravation etc.
To achieve these goals, the technological scheme taked of the present invention is:
The top scraper ring lubrication system of a kind of piston ring of internal-combustion engine and adjacent cylinder cover wherein, comprising:
One cylinder body of one opposed cylinder opposed piston type engine, described cylinder body have an outer piston and an inner carrier that moves reciprocatingly, and described outer piston top has at least one piston ring;
Have a scraper ring under described piston ring, wiping the lubricant oil of described inferior part of the cylinder block off, and the lubricant oil that will be wiped off is delivered to the top of described cylinder body;
Described scraper ring has one for the oil trap that stores the lubricant oil of being wiped off;
When described outer piston and described inner carrier arrived top dead center in work cycle, under the piston decelerating effect, lubricant oil left described oil trap, and a certain amount of lubricant oil enters the upper inside surface of described cylinder body.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described cylinder body comprises suction port and relief opening, and a nozzle opening near described outer piston and described inner carrier top dead center.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described outer piston and described inner carrier have respectively a piston top.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described piston ring has three, and the piston top bottom of described outer piston has two described piston rings, and the high order end of described outer piston also has a described piston ring.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described scraper ring has an outside ringwise edge, and described edge contacts with the internal surface of described cylinder body, and described scraper ring is described piston ring towards top; When described outer piston and described inner carrier moved from lower dead center to top dead center, described scraper ring can scrape lubricant oil from described inner surface of cylinder block.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described oil trap is a circular groove, a side of described oil trap and the EDGE CONTACT of described scraper ring, described oil trap is towards described edge; When described outer piston and described inner carrier move from lower dead center to top dead center, the lubricant oil that described oil trap is used for collecting and storage scrapes from described inner surface of cylinder block.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described scraper ring has annular groove, and described annular groove is continuous shape at the opening of circumferencial direction.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, described scraper ring has one and expands the gap, makes described scraper ring be installed in described annular groove, and contacts with the internal surface of described cylinder body after expansion.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, the thickness of described annular groove is greater than the thickness of described scraper ring.
The top scraper ring lubrication system of the piston ring of above-mentioned a kind of internal-combustion engine and adjacent cylinder cover, wherein, a radial space is formed at the bottom of described scraper ring, and the bottom of described annular groove and the inside of described scraper ring form an annular space.
The present embodiment has been set forth a kind of application that is arranged on the piston scraper ring of piston head piston ring below.In this position, residual machine oil on casing wall below scraper ring collection cylinder air inlet, and these machine oil are taken on the cylinder wall that closes on the firing chamber, piston has been crossed in the expansion stroke of atdc, the casing wall of the below of piston head piston ring can obtain enough lubricating.When scraper ring moved from the lower dead center to the top dead center with piston, the circular oil storage pool of scraper ring can be collected machine oil.During near top dead center position, the speed of piston changes (deceleration) when piston, and the variation of corresponding inertia makes the machine oil in the scraper ring oil storage pool be pushed to the cylinder wall of upper piston ring below, and is deposited on the there.The cylinder liner on the close piston of combustion chamber ring top, oil lubricating inlet and outlet mouth top of deposition, and in expansion stroke, allow upper piston ring that the lubricant oil of deposition is hung along casing wall downwards.
Embodiment disclosed by the invention depend on scraper ring be placed on the upper piston ring under, when piston slows down near top dead center, allow the machine oil of scraper ring collected inside to flow along cylinder liner and upper piston ring.Although in embodiment described herein, the pair of pistons ring is arranged at scraper ring top, in some design, scraper ring can replace one lower in the upper piston ring.
In the present invention, disclosed scraper ring is installed and is not comprised that piston vertically processes, but must set up an oil storage pool.
An object of the present invention is to provide a kind of lubrication system of improved two stroke engine, the deceleration when utilizing piston near top dead center, a certain amount of machine oil of scraper ring ejection is to the casing wall of upper piston ring below.
Another object of the present invention is to provide a kind of lubrication system of improved two stroke engine, by utilizing the reaction to inertia, sprays a certain amount of machine oil to the cylinder wall of piston top dead center.
A further object of the present invention is to provide a kind of lubrication system of improved two stroke engine, uses the inertial force of piston, and without any movement parts independently.
Description of drawings
The schematic diagram of Fig. 1 (a) when in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, outer piston is near top dead center;
The schematic diagram of Fig. 1 (b) when in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, outer piston is near lower dead center;
Fig. 2 is the plan view of scraper ring in Fig. 1 (a) and Fig. 1 (b);
Fig. 3 is that in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, scraper ring is arranged on schematic diagram in outer piston;
Fig. 4 is the enlarged view of scraper ring.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but not as limiting to the invention.
Although scraper ring is applicable to very eurypalynous internal-combustion engine, what lift here is to be installed on an opposed cylinder opposed pistons of two-stroke (OPOC) motor.
The schematic diagram of Fig. 1 (a) when in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, outer piston is near top dead center, the schematic diagram of Fig. 1 (b) when in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, outer piston is near lower dead center, see also Fig. 1 (a) and Fig. 1 (b), in the single cylinder body 100 in the opposed cylinder opposed pistons of multi-cylinder (OPOC) motor left side, outer piston 104, inner carrier 108.In Fig. 1 (a), 2 pistons in cylinder body 100 are all near top dead center 111 separately.In Fig. 1 (b), 2 pistons in cylinder body 100 are near lower dead center 112 separately (in opposed cylinder opposed piston type engine, inside and outside piston arrives top dead center and moment of bottom dead center position separately is slightly different) all.Inside and outside piston is connected on single bent axle by push rod (inner cylinder body) and pull bar (outer cylinder body), moves reciprocatingly along the X-axis 110 of cylinder body 100.
On the right side of cylinder body 100, inner carrier 108 has a piston top 106.The left side outer piston 104 of cylinder body 100 has a piston top 103.Cylinder liner 101 is in a conventional manner round piston.Two piston ring grooves are arranged at piston top 103 bottoms of outer piston 104, and piston ring 145,147 is equipped with in the piston ring groove the inside.The high order end of outer piston 104 has a piston ring 149.In the present embodiment, scraper ring 200 is positioned at the below of piston ring 145 and 147, is used for carrying machine oil to the upper area of interior surface of cylinder liner 109.Although do not show, in some engine design, scraper ring can replace one following in the top piston ring.
In Fig. 1 (a), piston 104 is at its top dead center position, and piston 108 is in top dead center 111 positions near it.Due to the intrinsic retardance of outer piston in opposed cylinder opposed pistons (OPOC) motor, when top dead center 111 positions of piston 104 at it, piston 108 is near top dead center 111 or leaves top dead center 111 positions, depends on port timing.
Here in order to reference, the one side of each piston catalytic combustion gas is defined as top or the top of piston; Although the piston in diagram can move by side to opposite side from one, other Part Definitions of piston skirt are below piston top.
The objective of the invention is an energy and provide moderate lubrication oil to internal surface 109 tops of cylinder body 101 near top dead center position as having mentioned in summary.Fig. 1 (a) and 1(b) in the place of outer cylinder body, inner cylinder body of " 113 " and " 114 " be exactly to need scraper ring 200 that lubricated like this zone is provided.Can find out the position of piston from Fig. 1 (a).During top dead center 111 position when piston 104 at it, the part that the dot and dash line that regional 113(upwards extends from Fig. 1 (b) is separated out) below piston ring 145 and 147.When top dead center 111 positions whens motion of piston 104 to it, scraper ring 200 is collected machine oil from (on the illustrated left side) of inner surface of cylinder block 109 regional 113 belows, by relief opening 105, then allows machine oil stay the zone 113 of inner surface of cylinder block 109.In the deceleration of top dead center 111 positions near it, the machine oil that collect scraper ring 200 the insides just has enough inertial force to leave scraper ring 200, stays the zone 113 of inner surface of cylinder block 109 due to outer piston 104.
In Fig. 1 (b), the piston top 103 of piston 104 has been opened porting 105 fully, so that the cylinder body inlet and outlet.During lower dead center 112 position when piston 104 at it, piston top 103 should lower than, be at least and the relief opening 105(left side) the actinal surface 102 of giving vent to anger concordant.During lower dead center 112 position when piston ring 149,145,147 below relief opening 105, piston ring is by the oil lubricating on the inner surface of cylinder liner that is ejected into relief opening 105 belows.Yet upper piston ring 145 and 147 is not taken away lubricant oil during by relief opening 105, if there is no scraper ring 200, the machine oil in the zone 113 of inner surface of cylinder liner can reduce.
Fig. 2 is the plan view of scraper ring in Fig. 1 (a) and Fig. 1 (b), and is shown in Figure 2.230, one annular machine oil sump tanks 220 of the outward edge of scraper ring and opening 250.Scraper ring is an annular in Fig. 2, but at unassembled state, the aperture position of scraper ring can expand outwardly a little, and within scraper ring is packed piston groove into, when entering cylinder sleeve, the outward edge of scraper ring can contact inner surface of cylinder liner 109.After piston was packed cylinder body into, scraper ring is inwardly compression owing to there being opening 250.
Fig. 3 is that in the top scraper ring lubrication system of the piston ring of a kind of internal-combustion engine of the present invention and adjacent cylinder cover, scraper ring is arranged on schematic diagram in outer piston, and Fig. 4 is the enlarged view of scraper ring, sees also Fig. 3 and shown in Figure 4.Piston ring 145 and 147 is arranged on respectively in piston ring groove 144 and 146, is piston top 103 above piston ring.Piston top 103 directly contacts with the combustion gas of high temperature, high pressure. Upper piston ring 145 and 147 be used for to stop gas to scurry into space between piston skirt 120 and inner surface of cylinder liner 109 from the firing chamber, also plays a low sliding support effect that rubs is provided between piston and cylinder sleeve.The piston ring 149 that is arranged in annular groove 148 plays the effect that piston aligns in cylinder sleeve 101.
Can see in Fig. 4, scraper ring 200 makes the edge 230 of scraper ring directly contact with the internal surface 109 of cylinder body 101 outwards partially.The edge 230 of scraper ring extends to form oil trap 220 in the oil ring body, oil trap 220 is collected the machine oil of inferior part of the cylinder block internal surface together with edge 230.Although scraper ring edge 230 is outer surface 240 extensions from scraper ring 200, outer surface 240 has formed an angle with scraper ring edge 230, so only have scraper ring edge 230 can contact the internal surface 109 of cylinder body 101.Annular groove 150 is thicker than scraper ring 200, so a radial space 152 has been formed at the bottom of scraper ring 200.The inside of the bottom of annular groove 150 and scraper ring 200 forms annular space 154.Space 152 and 154 provides enough spaces that scraper ring 200 is not stuck in the interior activity of annular groove 150.
Piston is in movement process, and when near its lower dead center 112 position, due to the effect of oil nozzle, scraper ring 200 can be collected enough lubricant oil on the internal surface 109 of cylinder sleeve 101.Due to piston from lower dead center 112 towards top dead center 111 whens motion, piston accelerates, so can make the edge 230 of scraper ring scrape lubricant oil from inner surface of cylinder liner 109 to enter oil trap 220.Piston arrives the upper end of cylinder sleeves with the lubricant oil process compression stroke of oil trap 220 the insides by relief opening 105.During near top dead center 111, piston slows down rapidly when piston, and due to the effect of inertia, the machine oil of oil trap 220 the insides leaves the zone 113 that oil trap 220 enters inner surface of cylinder liner 109.Enter zone 113 lubricant oil and enough lubricate in expansion stroke the upper piston rings of 112 motions from top dead center 111 to lower dead center.
Just as forward part is mentioned, provide a small amount of lubricant oil, scraper ring can be applied on any reciprocating motor as long as wish to cylinder sleeve top, upper piston ring below.The above embodiments have been described the outer piston with respect to opposed cylinder opposed pistons (OPOC) motor left side, but it is applicable to any internal-combustion engine with reciprocating piston too.
The above only is preferred embodiment of the present invention; not thereby limit embodiments of the present invention and protection domain; to those skilled in the art; should recognize that being equal to that all utilizations specification of the present invention and diagramatic content done replace and the resulting scheme of apparent variation, all should be included in protection scope of the present invention.
Claims (10)
1. the top scraper ring lubrication system of the piston ring of an internal-combustion engine and adjacent cylinder cover, is characterized in that, comprising:
One cylinder body of one opposed cylinder opposed piston type engine, described cylinder body have an outer piston and an inner carrier that moves reciprocatingly, and described outer piston top has at least one piston ring;
Have a scraper ring under described piston ring, wiping the lubricant oil of described inferior part of the cylinder block off, and the lubricant oil that will be wiped off is delivered to the top of described cylinder body;
Described scraper ring has one for the oil trap that stores the lubricant oil of being wiped off;
When described outer piston and described inner carrier arrived top dead center in work cycle, under the piston decelerating effect, lubricant oil left described oil trap, and a certain amount of lubricant oil enters the upper inside surface of described cylinder body.
2. the top scraper ring lubrication system of the piston ring of internal-combustion engine and adjacent cylinder cover according to claim 1, is characterized in that, described cylinder body comprises suction port and relief opening, and a nozzle opening near described outer piston and described inner carrier top dead center.
According to claim 1 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described outer piston and described inner carrier have respectively a piston top.
According to claim 3 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described piston ring has three, and the piston top bottom of described outer piston has two described piston rings, and the high order end of described outer piston also has a described piston ring.
According to claim 1 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described scraper ring has an outside ringwise edge, and described edge contacts with the internal surface of described cylinder body, and described scraper ring is described piston ring towards top; When described outer piston and described inner carrier moved from lower dead center to top dead center, described scraper ring can scrape lubricant oil from described inner surface of cylinder block.
According to claim 5 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described oil trap is a circular groove, a side of described oil trap and the EDGE CONTACT of described scraper ring, and described oil trap is towards described edge; When described outer piston and described inner carrier move from lower dead center to top dead center, the lubricant oil that described oil trap is used for collecting and storage scrapes from described inner surface of cylinder block.
According to claim 6 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described scraper ring has annular groove, described annular groove is continuous shape at the opening of circumferencial direction.
According to claim 7 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, described scraper ring has one and expands the gap, makes described scraper ring be installed in described annular groove, and contacts with the internal surface of described cylinder body after expansion.
According to claim 8 the piston ring of internal-combustion engine and adjacent cylinder the cover top scraper ring lubrication system, it is characterized in that, the thickness of described annular groove is greater than the thickness of described scraper ring.
10. the top scraper ring lubrication system of the piston ring of internal-combustion engine and adjacent cylinder cover according to claim 8, is characterized in that, a radial space is formed at the bottom of described scraper ring, and the bottom of described annular groove and the inside of described scraper ring form an annular space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100952679A CN103174540A (en) | 2013-03-22 | 2013-03-22 | Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100952679A CN103174540A (en) | 2013-03-22 | 2013-03-22 | Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve |
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| CN103174540A true CN103174540A (en) | 2013-06-26 |
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| CN2013100952679A Pending CN103174540A (en) | 2013-03-22 | 2013-03-22 | Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106907238A (en) * | 2017-03-31 | 2017-06-30 | 中北大学 | A kind of opposed-piston engine and its lubricating method that can lubricate piston |
| CN107035867A (en) * | 2016-02-03 | 2017-08-11 | 罗伯特·博世有限公司 | Removing device with banks of memory |
| CN109798197A (en) * | 2019-01-29 | 2019-05-24 | 大连理工大学 | The suppressing method of marine low-speed machine scavenging port cylinder oil aggregation |
| CN112443394A (en) * | 2019-08-29 | 2021-03-05 | 通用汽车环球科技运作有限责任公司 | Piston assembly for an internal combustion engine of a motor vehicle |
| CN113027656A (en) * | 2021-05-08 | 2021-06-25 | 褚氏工业科技(上海)有限公司 | Four-stroke turbocharged internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107035867A (en) * | 2016-02-03 | 2017-08-11 | 罗伯特·博世有限公司 | Removing device with banks of memory |
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| CN109798197B (en) * | 2019-01-29 | 2020-04-14 | 大连理工大学 | Method for inhibiting oil accumulation of scavenging port cylinder of marine low-speed machine |
| CN112443394A (en) * | 2019-08-29 | 2021-03-05 | 通用汽车环球科技运作有限责任公司 | Piston assembly for an internal combustion engine of a motor vehicle |
| US11313466B2 (en) | 2019-08-29 | 2022-04-26 | GM Global Technology Operations LLC | Piston assembly for an internal combustion engine of a motor vehicle |
| CN113027656A (en) * | 2021-05-08 | 2021-06-25 | 褚氏工业科技(上海)有限公司 | Four-stroke turbocharged internal combustion engine |
| CN113027656B (en) * | 2021-05-08 | 2022-10-21 | 苏州安誉升船舶机械有限公司 | Four-stroke turbocharged internal combustion engine |
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Application publication date: 20130626 |