SU1216403A1 - Compression piston ring - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to mechanical engineering, namely engine building, advantageously to compression rings of an internal combustion engine. The purpose of the invention is to increase the service life of parts of the cylinder-piston group (SchP and reduce oil consumption for waste by adjusting the radial pressure of the ring depending on temperature; Fig. 1 shows a ring with an insert in a circular undercut on the inner surface of the annular element, cross section); Fig. 2 is a view A in Fig. 1; in Fig. 3 a ring with a circular undercut displaced downward relative to the horizontal axis of symmetry; Fig. 4 a ring with two inserts in a circular ring of a ring element, transverse cross section reading

The piston compression ring is made in the form of a spring-loaded split ring element I having a bottom edge 2, a horizontal axis 3 of symmetry and a circular undercut 4, on the inner surface of which the insert 5 is fixed, made of a material with a shape memory effect. The insert and the circular undercut can be made in the form of a trapezoid, the larger base 6 of which faces the working surface 7 of the ring.

Copper-manganese-aluminum or iron-manganese alloys were used as the material for insert 5.

The circular undercut 4 on the inner surface of the annular element 1 can be displaced (FIG. 3) relative to the horizontal axis 3 of the symmetry of its section, for example, downwards.

In a circular groove 4 ring element 1 Sfig. 4) two inserts 8 and 9 made of different materials with a shape memory effect can be fixed.

Piston ring works as follows.

03

When starting the unheated engine 1CGH has a low temperature. In this case, the insert 5, installed in the circular groove 4, has a maximum curvature and reduces the radial pressure of the annular element 1, and therefore reduces the wear of the parts of the CPG.

As the engine warms up, the temperature of the parts of the CPG and insert 5 increases.

As the temperature rises in box 5, a reverse martensite transformation takes place. She is

reduces its curvature, thereby increasing the radial pressure of the annular element 1, which provides an improvement in the wiping properties of the piston ring.

The displacement of the circular top glasses 4 with the insert 5 down relative to the horizon. The 3 axis of symmetry of the cross section of the ring element 1 at the martensitic transformation provides, simultaneously with an increase in the radial pressure, the cross section of the ring element 1 so that it contacts the cylinder mirror with its lower edge 2, thereby increasing

oil scraper ring 1.

The installation in the circular recess 4 of the ring element 1 of two inserts 8 and 9, made of different materials, possessing the shape memory effect, leads: to a stepwise increase in the radial pressure of the ring on the cylinder mirror depending on the temperature of the CPG due to the difference

temperatures of the end of the reverse martensitic transformation. This provides a stepwise improvement in the piston ring wiper properties as the engine warms up.

The installation in the circular groove of an annular element of an insert made of a material having a shape memory effect reduces the wear of the CPG of a cold engine and reduces

lubricant oil consumption at higher CPG temperature.

fig.Z

(pvt.

Editor 0. Bugir

Compiled by V. Lobanov

Tehred O. Niece Proofreader A. Obruchar

976/39 Circulation 524 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (5)

1. A PISTON COMPRESSION RING for an internal combustion engine, comprising a spring ring element with an outer working surface, provided with a circular recess made from the side of the inner surface, characterized in that, in order to increase the service life of the cylinder-piston group parts and reduce oil consumption by burning by adjusting the radial ring pressure, depending on temperature, the ring is equipped with an insert made of a material with a shape memory effect and placed in a circular undercut of the ring. 2. Ring pop. 1, with the fact that the insert is located below the horizontal axis of symmetry of the ring. 3. Ring pop. ^ characterized in that the insert consists of at least two parts made of materials with different temperature levels of the shape memory effect. 4. The ring according to paragraphs. 1 and 3, on the basis of §, wherein the circular undercut of the ring and the insert are made in section in the form of trapezoids, the larger base of which is turned towards the working surface of the ring. 5. The ring according to paragraphs. 1-4, with the fact that copper-manganese-aluminum or ferromanganese alloys are used as the insert material. L FIG. 1