RU1774035C - Valve gear of internal combustion engine - Google Patents

Abstract

The essence of the invention: the diameter of the oil distribution line 2 exceeds the diameters of the connecting channel 9 and channels 3 and 4, communicating with the hydraulic compensator 5 and the bearings 6 of the camshaft, respectively, with a spring-loaded valve at the inlet of the channel 9 and its outlet located at the bottom distribution line 2. The inputs of the channels 3 are also located in its lower part, while the entrance to the channel 4 is located in its upper part. When the engine is running, the oil is trapped in line 2 and gas bubbles accumulate in its upper part, which together with the oil flows to the camshaft bearings 6, and cleaned oil from the bottom of the distribution line 2 flows to the hydraulic compensators 5. This embodiment improves the reliability of the valve mechanism by supplying deaerated oil, 1 sludge, c. с С vi vi о СО СП

Description

The invention relates to lubrication systems for an internal combustion engine, and more particularly, to devices for supplying lubricating oil to parts of a valve mechanism in an engine with an overhead camshaft.

A known lubrication system design is used by Volkswagen (Quattroruote, 1985, No. 362, pp. 192-193), where an air nozzle is provided in the distribution channel of the cylinder head to remove gas bubbles that accumulate in its upper part. Oil enters this channel through a tube, the upper end of which protrudes into the cavity. This partially prevents the drainage of oil from the channel when the engine is idle and its filling is accelerated.

The prototype is a device for supplying oil to the engine valve mechanism developed by HONDA (Piston and gas turbine engines // Express-Informations, 1988, No. 7), containing a supply channel, a distribution oil line, oil supply channels from the line to hydraulic compensators cam followers and camshaft bearings; a valve mechanism that regulates the flow of oil to the device. A pressure reducing valve is used to limit the pressure in the oil channels and check valves that perform anti-drainage functions.

The disadvantage of this device is the lack of purification of the oil supplied to the hydraulic lifters from gas bubbles, which reduce the quality of the hydraulic lifters, which causes increased noise in the operation of the valve mechanism and reduces the durability of its parts.

The purpose of the invention is to increase the reliability of the valve mechanism by supplying deaerated oil to the hydraulic compensators of the valve followers,

The device contains a supply channel, an oil distribution line, oil supply channels from the line to the valve follower hydraulic compensators and camshaft bearings, and a valve mechanism that regulates the oil supply to the device, which is made in the form of a spring-loaded anti-drain valve, the cavity of which is connected via a connecting channel to the highway. The input of the channel connecting the hydraulic compensator to the line is located in its lower part, and the input of the channel connecting the distribution supports

a shaft with a trunk located at the top of the trunk. The diameter of the oil line exceeds the diameters of other channels connected to it. Relatively

the large diameter of the line, in combination with the indicated location of the outlet channels, ensures that gas bubbles supplied to the hydraulic lifters are cleaned.

The drawing shows the proposed mechanism, section,

The valve mechanism of the internal combustion engine comprises a supply channel 1, an oil distribution

line 2, channels 3 and 4, respectively, oil supply from line 2 to the hydraulic compensator 5 and to the camshaft bearings 6. The cavity 7 of the anti-drain valve 8 through the connecting channel 9 is connected to the line 2. The input of the channel 3 is located in the upper part of the line 2. The cylinder head 10 and cylinder block 11 are also shown.

The valve mechanism operates as follows.

The oil pump delivers oil through the inlet channel 1 to the cavity of the valve 8, which at that time opens slightly. From cavity 7, oil enters line 2

through channel 9. Since the diameter of the line is significant, the oil entering it is delayed for a long time in it. At the same time, gas bubbles accumulate in the upper part of the line. This oil with bubbles

through channel 4 it enters the camshaft bearings 6, and the purified oil comes from the lower part of the line 2 through channel 3 to the hydraulic compensators 5.

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Claims (1)

The claims The valve mechanism of the internal combustion engine, comprising a camshaft with bearings, hydraulic compensators for the cam followers, a camshaft oil line and a supply oil channel communicated through a camshaft oil line with camshaft bearings and with hydraulic compensators for the valve followers, corresponding channels, characterized in that, in order to increase the reliability of the valve mechanism by supplying deaerated oil to to hydraulic compensators of valve pushers, the diameter of the oil distribution line exceeds the diameters of the channels communicating with the oil supply channel, hydraulic compensators of valve pushers and distributor supports shaft, and at the entrance to the channel, a solid oil line with supports common oil distribution camshaft located in the channel with the oil supply channel, the upper part of the channel and the channel inlets, a spring-loaded valve is connected, and its distributing oil magichod is located in the lower part5 bar with pusher hydraulic lifters oil distribution lines, valves, are located in the lower part of the channel inlets that communicate distribution lines.