CN2502022Y

CN2502022Y - Improved two-stroke engine

Info

Publication number: CN2502022Y
Application number: CN 01260017
Authority: CN
Inventors: 陈永清; 陈志杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-20
Filing date: 2001-09-20
Publication date: 2002-07-24
Anticipated expiration: 2011-09-20

Abstract

The utility model relates to an improved two-stroke engine which mainly builds a nested piston structure in a cylinder body. The nested piston structure consists essentially of a main piston and a nested piston, wherein, the top surface of the main piston is embedded with an air-proof piston ring, while the bottom shrinks in terms of the outer diameter to become a nesting part; the nested piston is internally provided with a cavity chamber the top of which forms a groove retainer with a comparative bigger inner diameter and the outer side is inserted with two groups of seal rings; and the main piston forms a nested piston structure by making the nested bottom inserted into the cavity chamber of the nested piston. Using the nested piston structure to do upward and downward strokes in the cylinder body can produce interacted opening or closing effects to the inlet and exhaust vent arranged on both sides of the cylinder body, realizing the function of sealing and outer shallow when lubricate oil is deposited in a crankcase, thus making two-stroke engine structure improve the purity of waste gas exhaust without adding lubricate oil into gasoline and reaching an environmental protection benefit.

Description

Improved two-stroke engine

Technical field

The utility model is relevant with the two-stroke engine structure, and the drawback that is primarily aimed at general two-stroke engine is done an improvement, makes it to reduce the pollution problem of burning and exhausting; More detailed it, refer to a kind of two-stroke engine that need not in gasoline to add lubricating oil especially.

Background technique

Please referring to Fig. 1, Fig. 2, schematic representation for general two-stroke engine structure, cylinder block 10 both sides relatively respectively are provided with a suction port 11 and a relief opening 12, one piston body 13 is provided with the piston ring 131 of close only effect and is placed in cylinder block 10 inside, one connecting rod, 14 1 end pivots knot, one pin 15, this pin 15 of mat is worn and is tied on piston 13, and this connecting rod 14 holds pivot then to tie on the bent axle 17 of setting in cylinder block 10 bottom crankcases 16 in addition; Be that piston 13 is in cylinder block 10 internal vertexs compression oil gas, when spark plug 18 is lighted compression oil gas and exploding, piston 13 can be promoted to down stroke, piston 13 is to down stroke during to relief opening 12 positions, the waste gas of combustion explosion just can be discharged, discharging moment at waste gas can be in the precompressed of relief opening 12 generation venturi effect and crankcase, make cylinder block 10 tops be negative pressure state, can suck oil gas by suction port 11 (being provided with one-way cock), this moment, piston 13 utilized connecting rod 14, the rotating power of bent axle 17, produce upward stroke and promote, and can compress oil gas once more, the ignition blast; Many economic benefits such as hence one can see that, and two-stroke engine has simple structure, power loss is little, horsepower is big, durable.Because piston 13 upper and lower strokes are through set suction port 11 in cylinder block 10 both sides and the event of relief opening, can't be in crankcase 16 internal reservoir lubricating oils, need lubricate based on machinery action, therefore the two-stroke engine structure need add lubricating oil in gasoline, after burning, can produce lubricant film, and show its incomplete combustion, just cause toxic emission not to be inconsistent the pollution problem of environmental protection eventually.

Please, be the schematic representation of general four-journey engine structure referring to Fig. 3.This four-journey engine is in order to store in crankcase 16 piston 13 and the lubricated machine oil of crank assemblby, and intake valve 20 and exhaust valve 21 are moved to cylinder block 10 tops, promptly piston 13 can not bring to lubricating oil 19 intake valve 20, exhaust valve 21 places in the upward stroke of cylinder block 10 inside.In brief, four-journey engine is constructed employed gasoline need not add lubricating oil, makes it comparatively environmental protection of toxic emission but have perfect combustion; Because opening or closing of intake valve 20 and exhaust valve 21 need be established protruding defeated axle (not shown) in addition and be controlled the problem of therefore deriving and having benefits such as structure is loaded down with trivial details, power loss big, horsepower is little to reduce.

Because the pluses and minuses of general two-stroke engine structure and four-journey engine structure, this creator utilizes the design experiences of being engaged in relevant industries for many years, at topic before possessing the two-stroke engine advantage, casting out shortcoming down, through thinking in many ways, constantly research, test, one practicability is arranged finally and can improve the two-stroke engine improved structure design establishment that the product of commonly using lack fraud, the phase can promote industrial upgrading and solve the environmental issue of toxic emission.

Summary of the invention

Main purpose of the present utility model is intended to utilize shell type piston structure of the present utility model, can be in cylinder block upward stroke, the inlet and outlet mouth that is arranged at the cylinder block both sides is done to end exhausted effect, make in the crankcase and can store lubricating oil, with need not in gasoline, to add lubricating oil so that two-stroke engine is constructed, and can promote the cleanliness of toxic emission, make it to have environment protection effect.

Concrete technological scheme of the present utility model is: a kind of improved two-stroke engine is characterized in that: mainly be equipped with the shell type piston structure in cylinder block inside, the structure of shell type piston consists predominantly of a main body piston, a body piston is formed; Wherein: this main body piston-top surface is embedded with the close piston ring that ends effect, and the bottom reduced outside diameter forms a nesting part; This body internal piston is established a chamber, and the chamber top is formed with the bigger groove seat of an internal diameter, and outer side surface is embedded with two groups and ends exhausted ring; The main body piston is worn with the bottom nesting part and is tied in the chamber of body piston, constitutes a kind of shell type piston structure.

The cylinder diameter of cylinder block is established with joining answering property and is the second order form.

Be embedded an internal buckle ring near the cylinder diameter bottom, second rank of cylinder block, the top is ended a pressure spring and is made spring contact at body piston bottom surface.

The body piston external diameter just equals the external diameter of main body piston, and body internal piston chamber internal diameter just equals the nesting part external diameter of main body piston.

This improved two-stroke engine that the utility model is designed, mainly be to be used in cylinder block inside to be equipped with the shell type piston structure, in order to when the upper and lower stroke of the inner start of cylinder block, can produce interactive opening or close to cylinder block both sides set suction port and relief opening, provide the function that only leaks extremely to the lubricating oil that stores in the crankcase, need not in gasoline, to add lubricating oil in order to the two-stroke engine structure, and can promote the cleaning of its toxic emission, make it to have environmental benefit.

For making to the purpose of this utility model, feature and effect, have and further understand and approval, lift the preferred embodiment conjunction with figs. now and be described as follows:

Description of drawings

Fig. 1: be the schematic representation (for compression, igniting stroke) of known two-stroke engine structure.

Fig. 2: be the schematic representation (for row, intake stroke) of known two-stroke engine structure.

Fig. 3: be the schematic representation of known four-journey engine structure.

Fig. 4: be the structually improved schematic representation of the utility model two-stroke engine (for compression, igniting stroke).

Fig. 5: the schematic representation that moves to down stroke for the utility model shell type piston.

Fig. 6: be the structually improved schematic representation of the utility model two-stroke engine (for row, intake stroke).

Fig. 7: be the schematic representation of another possible embodiments of the utility model.

Embodiment

See also Fig. 4, Fig. 5, Fig. 6, two-stroke engine structure of the present utility model is same as known technology haply, and its start principle is also identical with known technology, and the utility model improvements mainly are: utilize the shell type piston structure that is contained in cylinder block 10 inside, in cylinder block 10 inner starts, during down stroke, can produce interactive opening or close with relief opening 12 to the set suction port 11 in cylinder block 10 both sides, in order to providing the function that only leaks extremely to the lubricating oil that stores in the crankcase 16, and then can make the two-stroke engine structure, need not in gasoline, to add lubricating oil 19, and can promote the cleanliness of its toxic emission, make it to have environmental benefit; And of the present utility model being characterised in that: the shell type piston structure includes a main body piston 30 haply, a body piston 40 is formed; Wherein: this main body piston 30, top are same as generally to be commonly used product and is embedded with close piston ring 31 and the oil ring 33 that ends effect, its bottom reduced outside diameter and form a nesting part 32; This body piston 40, inside are established the chamber 41 of perforation top and bottom, and chamber 41 tops are formed with the bigger groove seat 42 of an internal diameter, and the outer side surface embedding is appropriate to have two groups only to

encircle

43,44 extremely; Wear with bottom nesting part 32 when main body piston 30 and to tie in the chamber 41 of body piston 40, just can constitute a kind of shell type piston structure.

And the utility model is in order to cooperate above-mentioned shell type piston structure, can have interactive effect in cylinder block 10 inside ccontaining, and cylinder block 10 internal modifications are become the second order form, promptly the first rank cylinder diameter 22 just equals main body piston 30 external diameters, the second rank cylinder diameter 23 just equals body piston 40 external diameters, and be located at the suction port 11 and relief opening 12 of cylinder block 10 both sides relatively, then be positioned at the second rank cylinder diameter 23 and suitably highly locate.After the shell type piston structure is placed in cylinder block 10 inside, near cylinder block 10 bottoms, be embedded an internal buckle ring 24, in order to can push up an only pressure spring 25, go to contact at body piston 40 bottom surfaces, provide body piston 40 to have upward stroke tension force.

As shown in Figure 4, in this position, main body piston 30 is in cylinder block 10 first rank cylinder diameters 23, but the piston ring 31 that mat is embedded is done the close only effect of compression oil gas; And body piston 40 can be in cylinder block 10 second rank cylinder diameters 23 summit blocks, only

encircle

43,44 extremely at inlet and

outlet mouth

11,12 upper and lowers with appropriate two groups of its side embedding, only cut off the lubricating oils 19 that store in the crankcase 16 and leak by 11,12 overflows of inlet and outlet mouth; As shown in Figure 5, when spark plug 18 is lighted compression oil gas and exploding, main body piston 30 downward promotion strokes are sunk to groove seat 42 inner contacts on body piston 40 chambers 41 tops, then can press and drive body piston 40 moves to down stroke synchronously, open into, relief opening 11,12 (this is the row who is same as known two-stroke engine structure, intake stroke), and make body piston 40 compress the spring of conflicting in its bottom surface 25 gradually, behind position shown in Figure 6, main body piston 30 is via connecting rod 14, the rotating power of bent axle 17 produces and upwards promotes stroke, main body piston 30 moves moment and loses and press body piston 40, but spring 25 tension force of conflicting in 40 mat bottom surfaces of body piston discharge, move with main body piston 30 synchronous upward strokes, until position shown in Figure 4, body piston 40 just reclosable advances,

relief opening

11,12, and main body piston 30 can be given birth to and compressed oil gas again, the igniting explosion stroke.

Please referring to shown in Figure 7, in this another feasible embodiment, the external diameter of body piston 40 just equals the external diameter of main body piston 30, and chamber 41 internal diameters of body piston 40 internal run-throughs just equal main body piston 30 bottom nesting parts 32 external diameters, wear with bottom nesting part 32 when main body piston 30 and to tie in the chamber 41 of body piston 40, also can constitute main body piston 30 and still can press the shell type piston structure that drives the 40 synchronization interactive displacements of body piston to down stroke.

The utility model two-stroke engine improved structure, can under not separated creation spirit and scope, be modified application, for example between class's internal diameter of cylinder block and the shell type piston structure profile, can do any joining and answer change in shape, and the main body piston in the shell type piston structure is worn and is tied in body piston chamber, change in shape is answered in can pressing synchronously to joining of down stroke of being had, and the utility model is not limited it.

In sum, the utility model two-stroke engine improved structure can be forgone the scarce fraud of known structure really, and really tool is promoted effect, and promotes the use value of this product, and open reaching used before the application again; Also non-ly have the knack of this operator and can finish easily, so propose patent application in accordance with the law.

Claims

1, a kind of improved two-stroke engine is characterized in that: mainly be equipped with the shell type piston structure in cylinder block inside, the structure of shell type piston consists predominantly of a main body piston, a body piston is formed; Wherein: this main body piston-top surface is embedded with the close piston ring that ends effect, and the bottom reduced outside diameter forms a nesting part; This body internal piston is established a chamber, and the chamber top is formed with the bigger groove seat of an internal diameter, and outer side surface is embedded with two groups and ends exhausted ring; The main body piston is worn with the bottom nesting part and is tied in the chamber of body piston, constitutes a kind of shell type piston structure.

2, improved two-stroke engine according to claim 1, the cylinder diameter that it is characterized in that cylinder block is established with joining answering property and is the second order form.

3, improved two-stroke engine according to claim 2 is characterized in that being embedded an internal buckle ring near the second rank cylinder diameter bottom of cylinder block, and the top is ended a pressure spring and made spring contact at body piston bottom surface.

4, improved two-stroke engine according to claim 1 it is characterized in that the body piston external diameter just equals the external diameter of main body piston, and body internal piston chamber internal diameter just equals the nesting part external diameter of main body piston.