Arbitrary overturn four-stroke cycle engine
The present invention relates to a kind of motor, the four stroke engine of using on especially a kind of small hand-held formula equipment, specifically a kind of turning four stroke engine.
At present, at all kinds of handheld tools of a large amount of uses of industries such as agricultural, herding, gardens, family, the machinery that wherein with the petrol engine is power is occupied very big market, because two-cycle engine is simple in structure, can be at outputting power under any rollover states, and common four stroke engine lubrication system can not be worked under rollover states, so on hand-hold power tool and a part farming, woods, military machine, still use two stroke engine in a large number.
Two stroke engine is not owing to there is independently intake and exhaust stroke, scavenging and breathing action are overlapping, machine oil and gasoline mixed combustion, cause high pollution, high oil consumption, along with people's environmental regulation is constantly perfect, the engine emission standard improves constantly, therefore need develop can 360 degree upsets four stroke engine, eliminate the two stroke engine that is still using at present.As Chinese patent ZL01104998.7, ZL200420085208X, promptly disclosed a kind of turning four stroke engine.
The quality and the lubrication effect of this type of gasoline engine performance are closely related, and lubrication effect is directly related with the lubricant mist cycle efficiency.The turning four stroke engine of above-mentioned patent disclosure, making crankcase and oil mist chamber class is that bent axle or oil pipe by hollow is communicated with, and utilizes the crankcase pressure fluctuation to drive mist of oil and circulates in motor, reaches lubricated purpose.
The actual use of said structure back finds that exist following defective: 1) owing to crankcase pressure influence of fluctuations factor complexity, the lubricant mist cycle efficiency is difficult to control, causes the engine lubrication consistency of performance poor; 2) since mist of oil generation chamber and crankcase interconnect, air pressure is basic identical, exist the mist of oil backflow phenomenon, cause the lubricant mist cycle efficiency low, there are not enough negative pressure to suck back in the mist of oil generation chamber through circuit lubricant oil, the phenomenon of motor spray machine oil occurred, caused and normally to use.3) crankcase inner control opening of valves is closed position lubricant oil rarenesses such as making piston, causes engine scuffing.
Summary of the invention
The objective of the invention is problem, invent a kind of arbitrary overturn four-stroke cycle engine that can effectively improve lubricating property at the lubrication effect difference of existing four-stroke miniature gasoline engine existence.
Technological scheme of the present invention is:
A kind of arbitrary overturn four-stroke cycle engine comprises:
Diaphragm carburetor, it is by the pressure pulse pumping fuel of engine crankcase, and unnecessary fuel oil is circulated to fuel tank; Accumulator, be used for sealing store lubricant oil and in establish the mist of oil generating means, bent axle drives the mist of oil generating means and produces lubricant mist; Crankcase, its underpart have passage to be communicated with the valve control room; Cylinder has oil inlet passage to be communicated with accumulator on the cylinder wall, the oil inlet passage position is under the piston lower dead center; The valve control room, interior dress valve control apparatus and gas and oil separating plant, top, valve control room is communicated with atmosphere, the bottom by drainback passage and accumulator together with.
When engine operation, bent axle drives the mist of oil generating means and produces lubricant mist.When piston stroking upward, oil inlet pipe is opened in the piston skirt, suck lubricant mist in cylinder from accumulator, when descent of piston, oil inlet pipe is blocked in the piston skirt, and lubricant mist is pressed into the valve control room together with exhaust gas inside cylinder, after gas and oil separating plant separates, the lubricant oil of liquefaction is through the sucked back accumulator of drainback passage, and waste gas then enters air-strainer by breathing pipe.
For avoiding a large amount of lubricant mists to be scraped into combustion chambers burn by piston ring, oil inlet passage should be under the piston ring all the time.
Beneficial effect of the present invention:
The present invention ground offers the filler opening of lubricating oil in the cylinder wall, utilize piston to form the plunger pump structure, the pumping lubricant mist is adjusted the degree of vacuum that the filler opening height just can change lubricant mist cycle efficiency and accumulator, has improved engine reliability and conformity; Remove the control valve in the oil discharge passage in the prior art, promptly avoided directly the reflux drawback of accumulator of lubricant mist, lubricant mist is fully stopped in cylinder, the appropriate interior negative pressure of cylinder that reduces, effectively improve lubrication effect, avoid the pull-cylinder phenomena generation, improved service behaviour simultaneously, eliminated fuel injection event.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the schematic representation of a work cycle of piston of the present invention.
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, 2.
A kind of four-stroke miniature gasoline engine, comprise body 7, body 7 can be made up of two-part up and down, be provided with accumulator 14 in the body 7, cylinder 9, crankcase 2, cylinder 9 is positioned at upper half part of body 7, crankcase 2 and cylinder 9 are communicated with and are positioned at the bottom of body 7, accumulator 14 is positioned at a side of cylinder 9 and crankcase 2, the bottom of crankcase 2 is provided with oil outlet 3, the lubricant mist of discharging in the oil outlet 3 enters valve control room 6 by oil discharge passage 4 (see figure 1)s, separates the back through gas and oil separating plant and enters from drainback passage 15 (see figure 2)s and finish a circulation the drainback passage 1 that communicates with accumulator 14 and be repeated utilization.Between described accumulator 14 and cylinder 9, be provided with oil inlet passage 10, there is oil inlet pipe 11 to stretch in the accumulator 10 at described oil inlet passage 13 1 ends, oil inlet pipe 11 also is positioned on the lubricant oil liquid level, and the other end is positioned under cylinder wall 9 upper pistons 8 lower dead center, and all the time at piston ring below 5.
The same with prior art, the main body bent axle of the bent axle 13 of present embodiment partly is arranged in crankcase 2, bent axle 13 is arranged in the impeller 12 that the lubricant oil atomizing that can make accumulator also is installed on the end of accumulator 14, also high speed rotating of impeller 12 when bent axle 13 high speed rotating nebulizes thereby the lubricant oil that is in contact with it impacted.
The same with prior art, the oil discharge passage 4 of present embodiment and drainback passage 3 all are opened in the inside of body 9.
Working procedure of the present invention is (as shown in Figure 3):
After the engine start, the lubricant oil in the accumulator is got rid of oily impeller 5 and has been got rid of, and is broken into vaporific.When piston stroking upward, the pressure P c＜Po in the crankcase (pressure in the accumulator), the mist lubrication oil in the accumulator enters cylinder 9 by oil inlet pipe 11 and oil inlet passage 10.
When descent of piston, piston moves down, and gradually oil inlet passage 10 is closed, and the lubricant mist of piston extruding simultaneously makes lubricant mist enter crankcase 2 from cylinder 9, and enters oil discharge passage 4 inflow valve control rooms by the oil outlet 3 of crankcase 2 bottoms.Through after the gas and oil separating plant Oil-gas Separation, the lubricant oil of liquefaction is got back to the bottom of crankcase 2 by drainback passage 15, enters in the accumulator by drainback passage 1, finishes a circulation.
As long as control lubricant oil oil mass of the present invention can guarantee that lubricant oil all can not bury oil inlet passage 10 and drainback passage 1 under the situation of motor 360 degree upset, and get rid of oily impeller 5 and all can touch lubricant oil and break into vaporific.
The specific embodiment of the present invention can have a plurality of mutation, but so long as is offering the lubricating oil passage between accumulator and the cylinder wall and among the design that oil discharge passage is offered in the gentle gate control of crankcase chamber all is considered to be encompassed in the present invention.
Dress valve control apparatus and gas and oil separating plant in the valve of the present invention control room 6, there are path 10 and engine cylinder UNICOM in the pasta top of accumulator 14, crankcase gentle gate control chambers 62 are interconnected, 6 tops, valve control room are communicated with atmosphere, the bottom is communicated with accumulator 14, when engine operation, following formula is set up:
Wherein Pc is the pressure of crankcase, and Po is the pressure of accumulator, and Pv is the pressure in valve control room.When engine operation, the rotation of bent axle impeller produces lubricant mist.When piston stroking upward, open oil inlet passage 10, suck lubricant mist to crankcase from accumulator 14, when descent of piston, block oil inlet passage 10, lubricant mist is pumped into valve control room 6, reach 6000 handkerchiefs through actual measurement accumulator negative pressure, the oil of liquefaction can suck accumulator 14 under the pressure difference effect in valve control room 6.Therefore motor is in any position, the each several part that is recycled to motor that mist of oil can be constant, thus guarantee good lubricating.In addition, owing to need not expensive oil pump, the motor cost is also very low.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.