CN2290702Y

CN2290702Y - Combination piston ring

Info

Publication number: CN2290702Y
Application number: CN 96222279
Authority: CN
Inventors: 张永根
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-20
Filing date: 1996-11-20
Publication date: 1998-09-09
Anticipated expiration: 2006-11-20

Abstract

The utility model discloses a combined piston ring used for an internal combustion engine piston. The utility model is characterized in that a main ring with an opening and a secondary ring with an opening are combined to form the utility model, the outside side of the main ring forms a step shape, and the secondary ring is arranged on the step of the main ring. The utility model changes the traditional structure of the piston ring, prevents a port of the piston ring from blow-by, enhances the sealing property of the piston ring and prolongs the service lives of components. Meanwhile, the utility model can efficiently raise the power performance and the economic performance of an engine, and reduces the discharge amount of waste gas.

Description

Compound piston ring

The utility model relates to a kind of piston ring that is used on the internal combustion engine, is the compound piston ring of a kind of packed-piston and cylinder wall matching gap specifically.

The piston ring of only packing into one in the per pass piston ring groove on traditional piston.In order to prevent that the piston ring thermal expansion from causing scuffing of cylinder bore and stuck in cylinder, thereby the general piston ring of producing all is an opening.The piston ring of opening causes piston ring port gas blowby easily in real work, the piston ring gas blowby causes engine power to descend, and oil consumption increase, discharge amount of exhaust gas increase serious consequences such as starting difficulty.

Thereby the purpose of this utility model is to provide a kind of and avoids piston ring port gas blowby to improve engine power, reduces fuel consumption and prolong the piston compound piston ring in working life.

To achieve these goals, the utility model adopts following technological scheme: a kind of compound piston ring, it is characterized in that: it is combined into by the main ring of an opening and the inner loop of an opening, and the outer side surface of main ring becomes step-like body, and inner loop places on the step of main ring.

Compared with the prior art the utility model has conspicuous advantage.Changed the conventional construction of piston ring, eliminated piston ring port gas blowby, thereby improved the sealability of piston ring and the working life of prolongation part, can improve power character, the Economy of motor simultaneously effectively and reduce discharge amount of exhaust gas.

Below in conjunction with drawings and Examples the utility model is elaborated.

Fig. 1 is that one of the utility model is lived embodiment's main ring and inner loop structural representation;

Fig. 2 is another preferred embodiment main ring of the utility model and inner loop port organization schematic representation;

Fig. 3 is that main ring of the present utility model, inner loop assemble schematic representation on piston.

See also Fig. 1 and shown in Figure 3, the utility model is combined into by the main ring 1 of an opening and the inner loop 2 of an opening, 3 one-tenth step-like bodies of the outer side surface of main ring 1, and inner loop 2 places on the step of main ring.Main ring and inner loop 2 outer rim working surfaces and following working surface must be on same planes, and can be respectively with cylinder wall and piston ring groove under working surface coincide mutually, main ring 1 also needs identical mutually with inner loop 2.But port shape is unrestricted, during installation, the port of main ring 1 and inner loop 2 position of staggering.The utility model has changed the conventional construction of piston ring, inserts knockdown piston ring in a piston ring groove, effectively prevents the piston ring gas blowby, improves engine performance.

See also shown in Figure 2ly again, a main ring and an end of the opening end of inner loop can be made the cross section and become L shape body 4, the other end is made the tenon structure 5 that is complementary with this L shape body 4.Adopt such port combination structure, more effectively prevent piston ring port gas blowby.

Claims

1. compound piston ring, it is characterized in that: it is combined into by the main ring of an opening and the inner loop of an opening, and the outer side surface of main ring becomes step-like body, and inner loop places on the step of main ring.

2. compound piston ring according to claim 1 is characterized in that: described main ring is that the cross section becomes L shape body with an end of described its opening of inner loop, and the other end is the tenon structure that is complementary with this L shape body end.