RU1809132C - Brake device - Google Patents

Abstract

Usage: internal combustion engines. The inventive valve 14 is installed in the control sleeve 2 and contains a fixed lower plate 8 and a piston 9 installed in the socket 3, in communication with the exhaust pipe 6 through the channel 4, the springs 12 and 13 are installed between the fixed lower plate 8 and the upper plate 11 .1 ill.

Description

The invention relates to engine manufacturing, in particular to exhaust brakes of motor vehicles.

The purpose of the invention is to reduce noise and increase durability.

To this end, the device is provided with a cylindrical stationary lower plate installed in the head socket, the piston being mounted coaxially with the outer surface of the lower plate with the possibility of interacting with the upper plate, and valve springs are placed between the upper and lower plates.

The drawing shows the proposed device, a longitudinal section.

In the head of the block 1 around the sleeve 2 there is a cylindrical socket with a recess 3 connected by a channel 4 to the outlet channel 5 of the head. In the exhaust pipe 6, a throttle valve 7 is installed.

A cylindrical stationary plate 8 is mounted in the cylindrical socket, and a piston 9 coaxially with its outer surface, with the possibility of axial movement of the latter along the mating surfaces of the socket and the lower plate. . An upper plate 11 is mounted on the valve stem 10 of the exhaust valve. Valve springs 12 and 13 are located between the upper and lower plates.

When the shutter 7 is turned on for engine braking, the increase in pressure in the exhaust channel 5 is transmitted through the channel 4 to the piston recess 3, the piston 9 is withdrawn to its highest position, limited by the poppet 11. The piston 9 is directly transmitted from the gas pressure through the poppet 11 to the stem 10 exhaust valve.

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The diameter of the piston 9 is selected taking into account that the necessary increase in the outlet pressure at a much smaller value than is required by the condition of equal forces from the gas pressure on the rod 10 and on the valve head 14. Therefore, the placement of the piston 9 on the head of the block 1 is not difficult. Meanwhile, due to the fact that the lower plate in the form of a piston with valve springs is excluded from the transmission chain of the force to the valve stem, the complete damping of the oscillation of the turns of the valve spring springs and the absence of piston impacts create the necessary conditions for reliable engine operation under braking conditions.

Claims (1)

The claims The brake device of a predominantly internal combustion transport engine having a shutter in the exhaust pipe for engine braking, comprising a valve with a guide sleeve, a valve spring with an upper plate fixed to the valve stem, a cylindrical cylinder head socket in communication with the exhaust pipe, a piston mounted in the socket with the possibility of axial movement along the latter, characterized in that, in order to reduce noise and increase durability, the device is equipped with a cylinder cal fixed lower plate mounted in the socket head, wherein the piston is mounted coaxially with the outer surface of the lower plate to cooperate with the upper plate, and the valve springs are arranged between the upper and lower plates.