SU1315855A1 - Brake bench for internal combustion engine - Google Patents

Abstract

The invention relates to the field of engine-building and allows for high-quality engine burn-in and a reduction in its reduction time. A three-way valve 5 is installed on the intake manifold (T) 3 of the engine being operated; it is designed to supply air to T 3 from the atmosphere or from accumulator B, where the air is under pressure. On (L oo ate CX) ate

Description

The intake port 4 is equipped with a three-way valve 6 for supplying pressurized air to the battery or the recovery system. The inlet and outlet T are interconnected via an accumulator and non-return valve 7. The pressure in the accumulator is determined by the pressure in the pneumatic system.

The invention relates to mechanical engineering and can be used in the manufacture and repair of reciprocating machines, such as internal combustion engines.

The purpose of the invention is to provide high-quality engine running-in, reducing its time and reducing costs.

The drawing shows a diagram of the brake stand.

The stand contains an electric motor 1, an engine of internal combustion 2, inlet 3 and exhaust 4 pipelines, three-way valves 5 and b, a check valve 7 and a battery (receiver) 8 with a pressure gauge 9.

The motor 1 is connected via a shaft (not shown) to the running engine 2, on the inlet pipe 3 of which a three-way valve 5 is installed, intended to supply air to the intake pipe from the atmosphere or from the battery 8 where the air is under pressure. A three-way valve 6 is installed on the exhaust pipe 4 for supplying pressurized air to the accumulator or utilization system (exhaust gas system). The engine intake and exhaust pipelines are interconnected through a battery and a check valve 7, designed to allow compressed air to flow from the engine to the battery and prevent air from flowing in the opposite direction. The accumulator 8 accumulates the compressed air supplied through the non-return valve, and the pressure in it determines the pressure in the pneumatic system of the stand. The magnitude of this pressure is monitored by a pressure gauge 9,

315855

The engine is controlled by a pressure gauge 9. Air supply to the cylinders of the engine under pressure allows the running-in of the areas of the engine's rubbing surfaces that need to be prepared for the sensation of exploitation loads during its operating cycle. 1 il ..

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The device works as follows.

A pre-prepared internal combustion engine 2 is installed on supports (not shown), connected to the electric motor 1 by a shaft (not shown). The three-way valve 6 is placed in a position in which the outflow pipe 4 is connected to the battery 8 via a non-return valve 7, and the three-way valve 5 so that it closes the stand's pneumatic system, disconnecting the battery, but provides air to the inlet pipe from the atmosphere .

The engine is cold-burned in, rotating its shaft by an electric motor 1. At the same time, the air coming into the engine from the atmosphere through valve 5 is compressed through the exhaust pipe 4 and the return valve 7 enters the battery 8. The three-way valve 6 is installed

to a position in which the outlet pipe 4 is connected to the receiver 8 via a check valve 7. A three-way valve 5 connects the air from the atmosphere to the exhaust manifold 3 and simultaneously closes the pneumatic system. When starting the electric motor 1 through the shaft, the crankshaft of the engine 2 rotates, which during cold running-in forces air into the receiver 8 to a predetermined pressure, which is controlled by a pressure gauge 9,

Three-way cranes. 5. Shut off the flow of air from the atmosphere and serves in the inlet pipe 3 air

under pressure from the receiver 8. If necessary, the subsequent increase in pressure in the pneumatic system with a three-way valve 5 simultaneously

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close it and connect the inlet pipe 3 to the atmosphere until the desired value of air pressure in the receiver 8 is reached. If necessary, the pressure in the pneumatic system is reduced by a three-way valve 5, the pneumatic system is connected to the atmosphere, and the air under pressure is vented to the atmosphere. At the same time, the three-way valve 6 is partially opened, which prevents additional injection of air into the receiver 8 as a result of additional air from the atmosphere entering the engine 2. Acting to increase or decrease the pressure until the pressure in the receiver 8 does not meet the required values.

The supply of air to the cylinders of the engine under pressure allows the running of those parts of the engine's rubbing surfaces, which must be prepared for the perception of operational loads during its operating cycle, and also to exclude abrupt application of the load at the moment of opening the discharge valve. This increases the quality of running-in. The device intensifies the burn-in due to the intensification of the contact interactions of the rubbing surfaces throughout the entire engine cycle during cold running-in at low engine speeds.

Editor P.Geershi Order 2353/45

Compiled by V.Gorbunov

Tehred M. KhodanychKorrektor A.Obruchar

Circulation 776 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, Projecto st., 4

554

After the end of the cold run-in, the electric motor 1 is stopped, the three-way valve 6 is opened, and the three-way valve 5 is connected to the atmosphere, the pneumatic stand system, and the air is removed from it.

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Then mount the necessary equipment on the engine for its subsequent hot running.

Claims (1)

Invention Formula Brake stand for running-in of the internal combustion engine, containing the test engine with intake and exhaust lines, connected to. an electric motor, and the first three-way valve installed on the exhaust pipe, characterized in that, in order to increase the quality of running-in, the stand further comprises a pneumatic accumulator with a pressure gauge, a second three-way valve installed on the intake pipe 5 and a check valve placed on the three-way valve the exhaust pipe and the battery, the inlet pipe communicating with the exhaust pipe through the first and second three-way valves, the battery and the check valve.