CN2489102Y - Piston for internal-combustion engine - Google Patents

Abstract

The utility model relates to a piston for internal combustion engine. wherein, the top of the piston is provided with one or two piston ring air grooves, and width of the piston ring air groove is equal to that of two piston rings. The piston is internally provided with two piston rings, and the opening angles of the two piston rings are mutually staggered; and the piston ring air groove is internally provided with two circumferential direction positioning pins, and the angles of the two circumferential direction positioning pins are mutually staggered. The utility model has the advantages of good sealing performance, little pollution and high output power.

Description

Internal combustion engine

Technical field

The utility model relates to a kind of explosive motor piston.

Background technique

The piston of explosive motor is provided with twice or three road piston ring air drains at present, has certain distance between the adjacent two-piston ring air drain.Because the piston ring that is contained in the piston ring air drain has opening, forms leakage path between opening and cylinder sleeve, along with piston ring is worn gradually, opening increases gradually, and gas leak phenomenon is more and more serious.Thereby cause poor sealing performance, compression is fallen than low, and fuel consumption increases, and degradation covers end under the engine power performance; Scurry into machine oil in the cylinder simultaneously, increased exhaust emissions, cause environmental pollution.Have and form two force bearing points between the internal-combustion engine piston ring of opening and the cylinder sleeve, in the course of the work, easily cause the ellipse wearing and tearing of internal combustion engine cylinder jacket inwall, so piston ring on the conventional piston and cylinder sleeve life-span lack.

The model utility content

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of good seal performance is provided, pollute little, the internal combustion engine that output power is high.

The utility model internal combustion engine, the piston ring air drain of the width that wherein to be provided with 1 or 2 width at the top of described cock body be two piston rings, the piston ring that two opening angles stagger mutually is housed in it, and in the piston ring air drain, is provided with the circumferential locating stud that two angles stagger mutually.

The utility model internal combustion engine, wherein said two locating studs stagger 90 ° mutually.

The utility model internal combustion engine, owing in a piston ring air drain, the piston ring that two opening angles stagger mutually is housed, thus one of them piston ring can block the opening of another piston ring, reaches sealing fully.So compression ratio improves, the utilization ratio of fuel and working efficiency improve, and reduce the exhaust emissions amount simultaneously.The utility model internal combustion engine has directly reduced the generation of tail gas from the source of power, existing EFI or compare with technology governance tail gas such as exhaust gas cleaners and to have characteristics such as cost is low, convenient.In addition, the several angle because the opening of two internal-combustion engine piston rings staggers, they and cylinder sleeve form four force bearing points, and wearing and tearing are more even in the course of the work, so the life-span is long.If the opening of two internal-combustion engine piston rings staggers 90 ° mutually, so, four force bearing points that itself and cylinder sleeve form are positioned on the same circle substantially, and it is more even to wear and tear, and the life-span of piston ring and cylinder sleeve can prolong about one times.

Other details of the utility model internal combustion engine and characteristics can just can be cheer and bright by reading the embodiment hereinafter encyclopaedize in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the utility model internal combustion engine.

Embodiment

The utility model internal combustion engine comprises cock body 2 and is arranged on piston ring air drain 1 on the cock body 2, oil ring groove (not shown) etc.Wherein, the piston ring air drain 1 of the width that to be provided with 1 width at described cock body 2 tops be two piston rings 3 is provided with two locating studs 4 of 90 ° that stagger mutually in piston ring air drain 1.Two piston rings 3 are housed in piston ring air drain 1, their open card on locating stud 4, thereby piston ring can not be rotated, guarantee that the opening of piston ring 3 also staggers 90 °.One of them piston ring can block the opening of another piston ring like this, constitutes an astomous piston ring group, has avoided gas leakage to greatest extent.

Internal combustion engine described in the utility model can utilize traditional internal combustion engine to transform, and with traditional internal-combustion engine piston ring reduced thickness, plug annular groove height alive is enlarged to two piston ring thickness and gets final product.

Claims (2)

1, a kind of internal combustion engine, it is characterized in that being provided with the piston ring air drain (1) that 1 or 2 width is the width of two piston rings (3) at the top of described cock body (2), the piston ring (3) that two opening angles stagger mutually is housed in it, and in the piston ring air drain, is provided with the circumferential locating stud (4) that two angles stagger mutually.

2, internal combustion engine according to claim 1 is characterized in that described two locating studs (4) stagger 90 ° mutually.