KR200160769Y1 - Cylinder oil supply system - Google Patents

Abstract

By forming the reservoir in the oil ring of the piston, the oil can be splashed on the cylinder wall before the pumped oil arrives at the engine start-up to form an oil film to prevent the engine's initial wear and improve the durability of the engine. To provide the oil supply structure of the cylinder wall at the initial start of the engine, the first compression ring (60) through the first ring groove 60, the second ring groove 62 and the third ring groove (64) formed in the piston ( 80, the second compression ring 82 and the oil ring 84, in order to be installed, to form a reservoir (10) in which the oil can stay on the upper edge of the oil ring 84, the second compression The bottom edge of the ring 82 is characterized by the formation of a lobe 20 in which oil in the reservoir 10 can induce scattering towards the cylinder wall 90.

Description

Oil supply structure of cylinder wall at engine start-up

The present invention relates to a piston used in an internal combustion engine, and in particular, to form a reservoir (reservoir) in which the oil can stay in the oil ring installed on the piston, the oil in the reservoir of the oil ring when the engine is started by the inertia force The oil is supplied to the cylinder wall before the oil is supplied from the oil pump of the engine so that the cylinder wall can be protected from friction during the initial start-up of the engine. Oil supply structure.

In general, the piston reciprocates in the cylinder to generate rotational force on the crankshaft through the connecting rod with the pressure received from the gas at high temperature and high pressure in the power stroke.The piston maintains airtightness between the piston and the cylinder wall and at the same time A compression ring is scraped to scrape off oil, and an oil ring to scrape off excess oil sprayed on the cylinder wall.

1 illustrates a state in which a compression ring and an oil ring are installed in a conventional piston.

As shown in the drawing, the first ring groove 60, the second ring groove 62, and the third ring groove 64 formed in the piston 50 include the first land 70, the second land 72, and the third land 74. And a first compression ring 80, a second compression ring 82, and an oil ring 84 are sequentially installed.

The conventional piston 50 configured as described above is connected to the crankshaft through a connecting rod, and the piston 50 reciprocates in an explosive stroke during combustion as the engine is started. The first compression ring 80 and the second compression ring 82 maintain the airtight between the cylinder wall 90 and at the same time the oil ring 84 scrapes off excess oil sprayed on the cylinder wall 90.

In the piston 50 constructed and operated as described above, when the engine is turned off, the engine oil in the cylinder wall 90 flows down, so that the oil in the cylinder wall 90 flows out over time. When the engine is started again in a consumed state, no oil film is formed on the cylinder wall 90 until the oil pumped by the engine oil pump reaches the cylinder wall 90 so that the metal and the metal are in direct contact. This acts as a major cause of wear of the cylinder wall 90. As a result, abnormal exhaust gas generation and carbon deposits are generated by abnormal wear of the cylinder wall 90, which affects the combustion performance and durability of the engine.

The present invention was devised to solve the above-mentioned problems of the prior art. By forming a reservoir in the oil ring of the piston, the oil is splashed on the cylinder wall before the oil pumped from the oil pump is reached. It is an object of the present invention to provide an oil supply structure of the cylinder wall during initial startup of the engine, which prevents the initial wear of the engine by forming a film, thereby improving the durability of the engine.

In order to achieve the above object, the present invention is provided with a first compression ring, a second compression ring, and an oil ring sequentially installed through a first ring groove, a second ring groove, and a third ring groove formed in a piston, and an upper portion of the oil ring. A reservoir is formed in the rim, and a reservoir is formed on the bottom rim of the second compression ring to form a lobe that can induce scattering toward the cylinder wall. At the initial start of the engine, the second compression ring is moved downward by the inertia force at the bottom dead center of the piston, and the lobe hits the reservoir oil, causing the oil to splash into the cylinder wall, before the pumping oil is reached by the oil pump. The oil is supplied to the wall.

1 is a view illustrating a main portion of a conventional piston and a cylinder wall.

Figure 2 is a schematic view of the main part between the piston and the cylinder wall of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: reservoir 20: lobe

50: piston 82: first compression ring

84: oil ring 90: cylinder wall

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, the same or equivalent parts as in the prior art will be described with the same reference numerals.

Figure 2 illustrates a main configuration diagram between the piston and the cylinder wall of the present invention.

As shown in the drawing, the first ring groove 60, the second ring groove 62, and the third ring groove 64 formed in the piston 50 include the first land 70, the second land 72, and the third land 74. And the first compression ring 80, the second compression ring 82, and the oil ring 84 are installed in this order, so that oil may stay on the upper edge of the oil ring 84. A reservoir 10 is formed, and at the bottom edge of the second compression ring 82, the oil O in the reservoir 10 forms a lobe 20 which can induce scattering toward the cylinder wall 90. It is configured by.

According to the present invention configured as described above, when the piston 50 arrives at the bottom dead center at the initial start of the engine and the speed of the piston 50 becomes zero, the second compression ring 82 is shown in FIG. As described above, the lower surface 62a of the second ring groove 62 is positioned. Accordingly, the lobe 20 formed at the bottom rim of the second compression ring 82 hits the oil O accumulated in the reservoir 10, so that the oil O is guided to the lobe 20. It is scattered to form an oil film on the cylinder wall 90.

As described above, since the engine oil in the oil pan is initially pumped by the oil pump and reaches the cylinder wall 90 at the initial start of the engine, oil is supplied to the cylinder wall 90 so that the Direct friction can be avoided so that wear of the cylinder wall 90 can be minimized.

As described above, the present invention has a reservoir in which oil can stay on the upper edge of the oil ring, and a lobe in which the oil in the reservoir can induce scattering toward the cylinder wall is formed on the bottom edge of the second compression ring. By eliminating the time of lubrication on the cylinder wall during the initial start-up of the engine to minimize the wear of the cylinder wall has the effect of improving the durability of the engine.

Claims (1)

The first compression ring 80, the second compression ring 82, and the oil ring 84 are formed through the first ring groove 60, the second ring groove 62, and the third ring groove 64 formed in the piston 50. In being installed one by one, A reservoir 10 is formed in the upper edge of the oil ring 84, and oil in the reservoir 10 on the bottom edge of the second compression ring 82 is directed toward the cylinder wall 90. The oil supply structure of the cylinder wall at the initial start-up of the engine, characterized in that formed by forming a lobe 20 to induce scattering.