CN2291511Y - Reciprocating double-piston two-stroke engine - Google Patents

Abstract

The utility model provides a fixing plug in the inner cavity of a piston on the basis of a two-stroke engine. Thus, the two-stroke engine only burns single gasoline, and the utility model is still characterized in that every time the crankshaft of the two-stroke engine rotates for a circle, and the utility model ignites once; the utility model is also characterized in that a four-stroke engine only burns the single gasoline, and the utility model is lubricated only by engine oil. The utility model decreases the pollution to the environment because the utility model does not burn mixed oil.

Description

Reciprocating type two plug two-stroke gasoline engine

The utility model is a kind of internal-combustion engine, be a kind of be combustion chamber of air cylinder ventilation without crankcase, do not burn the two-stroke gasoline engine of miscella.

In current domestic and international each cylinder of reciprocating piston two-stroke gasoline engine a piston only is housed, piston is divided into two chambers (both firing chamber to cylinder and crankcase, crankcase), piston is connected with bent axle by connecting rod and moves reciprocatingly, utilize the crankcase that seals to take a breath for the firing chamber and finish reciprocal work cycle, therefore present two-stroke gasoline engine crankcase can not be used as lubricating oil bath.Cylinder sleeve and piston, the lubricated of connecting rod bearing and crankshaft bearing is the lubricating method that adopts lubricant oil and fuel oil mixing feed, just in gasoline, be blended into lubricant oil according to a certain percentage, lubricant oil by the gasoline band after gasoline is mixed with lubricant oil enters in crankcase and the cylinder sleeve by inlet hole, with the method for adhering to is cylinder sleeve and piston rod bearing, crankshaft bearing is lubricated, the delivery volume required precision height of this method lubricant oil is wayward, lubricant oil is few, be directed at insufficient lubrication, parts wear and tear too early, lubricant oil is many, consumption of lubricating oil is big, can not perfect combustion, produce very big soot pollution environment, and caused a large amount of carbon deposits of firing chamber and spark plug, the rate of fault of machine is increased, influenced the working life and the performance of machine.All fail both at home and abroad at present to address this problem.

The purpose of this utility model be exactly to provide a kind of novel, independent lubricating system is arranged, do not burn the low pollution of miscella, high efficiency reciprocating type two plug two-stroke gasoline engines.

The purpose of this utility model is achieved in that and installs a fixed plug additional in the inner chamber at piston on the basis of former two-stroke gasoline engine, this fills in the lower end surely and crankcase is connected fixing, upper end and piston cavity keep the motion sealing, so just make between the inner chamber of piston and the crankcase because the isolation of fixed plug forms independently two chambers, being crankcase and capacity changes the sealing air-exchanging chamber of volume with piston up-down, and the effect of this air-exchanging chamber is to be used to suck combustion gas and the firing chamber is compressed in combustion gas.The function of combustion gas is still finished by exhaust port by the firing chamber, and this structure two stroke diesel engine also is suitable for.

The utility model just changes the chamber of two isolation of original two-stroke gasoline engine (crankcase and firing chamber) that to have put three chambers be firing chamber, air-exchanging chamber and crankcase owing to added a fixed plug, just become single lubricating oil bath like this in the crankcase, with the oil pump and the method for splashing each part of machine is lubricated, so just solved the soot pollution environment that former two-stroke gasoline engine produces with oil-in-gasoline lubrication, firing chamber and sooting of the spark plug and insufficient lubrication make the parts shortcoming of wearing and tearing too early.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing.

Figure 12 is the sectional drawing according to the reciprocating type two plug two-stroke gasoline engines that the utility model proposes.

Below in conjunction with Fig. 1, Fig. 2 detail details and working condition according to the concrete device that the utility model proposes are described.

The reciprocating type two plug two-stroke gasoline engines of the utility model mainly are by cylinder body 1, piston 2, fill in 3 surely, connecting rod 4, bent axle 5, crankcase 6 etc. constitute (as shown in Figure 1), have on the cylinder body and have inlet hole 10 and air-vent 11 on inlet hole 7, air-vent 8, exhaust port 9, the piston, the switching of pore is to be controlled by reciprocating motion of the pistons, fixed end is beyond the Great Wall packed in the piston, lower end and cylinder body together are fixed on the crankcase, the bi-side of fixed plug have symmetrical elongated slot 12, make wrist pin pass elongated slot 12 and are connected with piston 2.Wrist pin moves up and down in the elongated slot 12 of fixed plug during piston up-down, but does not interfere, and when piston moved reciprocatingly like this, piston cavity formed a variation cavity that separates with the crankcase sealing with fixed plug and is used for finishing air inlet, ventilation.Crankcase can be adorned lubricant oil and be used as lubricating oil bath, and it is lubricated with the oil pump feed dual mode to splash to machine.

After the work mixed steam has entered cylinder 1, piston 2 is begun to move up by lower dead center and (sees Fig. 2 a), and successively with the air-vent 8 on cylinder 1 and the piston 2,11 and cylinder on exhaust port 9 close, mixed steam in the cylinder 1 is compressed, the volume of piston 2 inner chambers increases gradually along with the up of piston 2, and air pressure reduces.When piston 2 goes upward to inlet hole 10 on the piston 2 and connects with the inlet hole 7 on the cylinder 1 (seeing Fig. 2 b), mixed gas is sucked into piston 2 inner chambers, piston 2 walks to the budc several angle, plug ignition makes mixture combustion, promote piston 2 declines and drive other mechanism kinematic and close inlet hole 7 and 10 gradually, piston 2 cavity volume are dwindled mixed gas and promptly are compressed.Because a little higher than air-vent 8 in exhaust port 9 positions, piston 2 descends and earlier exhaust port 9 is opened, waste gas is discharged, along with the air-vent 8 on the cylinder has been opened in the continuation decline of piston 2 again, air-vent 11 on the piston 2 and 8 connections of cylinder air-vent, the compressed mixed gas of piston 2 inner chambers are in air-vent 8 enters cylinder 1 simultaneously, clear away waste gas remaining in the cylinder 1 simultaneously, this process lasts till that always piston 2 crosses lower dead center and move up and air-vent 8 and exhaust port 9 are closed, and beginning is circulation next time.

Claims (6)

1, a kind of reciprocating type two plug two-stroke gasoline engines, its structure is by cylinder block 1, piston 2, connecting rod 4, bent axle 5, be made up of axle box 6, inlet hole 7, air-vent 8, exhaust port 9, it is characterized in that having on the piston body inlet hole 10 and air-vent 11, piston 2 inner chambers are equipped with and decide plug 3, surely filling in 3 lower ends is fixed on the cylinder body 1, the upper end becomes the motion seal form with piston 2 inner chambers, and makes crankcase double as lubricating oil bath.

2, reciprocating type two plug two-stroke gasoline engines according to claim 1 is characterized in that deciding that the bilateral symmetry face has slotted hole 12 on the plug 3, are passed by wrist pin in the middle of the slotted hole 12, and when piston up-down, symmetrical slotted hole 12 does not influence moving up and down of wrist pin.

3, reciprocating type two plug two-stroke gasoline engines according to claim 1, it is characterized in that, surely fill in 3 upper ends and be in the inner chamber that is contained in piston 2, the inner chamber and the fixed footpath beyond the Great Wall of piston form the motion seal form, can be piston ring seals, also can be the sealings of tilted conical surface formula.

4, reciprocating type two plug two-stroke gasoline engines according to claim 1 is characterized in that deciding plug 3 in piston body, and its lower end is fixed on the cylinder body, can not rotate, and form sealing.

5, reciprocating type two plug two-stroke gasoline engines according to claim 1, it is characterized in that piston 2 up when top dead center the inlet hole on the piston 2 and the inlet hole on the cylinder block connect combustion gas and enter piston 2 inner chambers, piston 2 descending air-vent on the piston 2 and 8 connections of the air-vent on the cylinder block when lower dead center, combustion gas enters the firing chamber.

6, reciprocating type two plug two-stroke gasoline engines according to claim 1 is characterized in that the structure of its fixed plug is suitable for two stroke diesel engine.

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