SU1642242A1 - Method of the oil consumption measurement in an internal combustion engine and the device for its realization - Google Patents

Abstract

The invention relates to the measurement of oil consumption when testing internal combustion engines. The purpose of the invention is to eliminate the loss of oil during testing. The method is carried out by maintaining a constant level of oil in the crankcase of the engine by pumping it into the measuring tank, and from the measuring tank back to the crankcase, the oil consumption is determined by the change in the mass of the measuring tank, and the preliminary intake pipe is moved at a constant speed to fill the measuring tank. . A device for implementing the method consists of a suction inlet 3, which is lowered into the crankcase 1 of the engine 2 by means of a gear rack 5, a gear wheel 6 located on the engine shaft 7. A sliding contact 20 is turned on in the power supply circuit of the engine 7, which opens when the gauge is filled Capacity 11 oil. 1 il.

Description

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The invention relates to instrument engineering and is intended to measure the oil consumption for waste in crankcases of internal combustion engines.

The purpose of the invention is to prevent loss of oil in the measurement process.

The method is carried out as follows.

The suction pipe is loaded with the sublevel of oil in the engine crankcase and maintains this level by pumping oil from the crankcase with one pump into the measuring tank, and from the measuring tank with another pump back into the crankcase, the oil consumption is judged by the change in oil weight in the measuring tank.

In this case, the intake pipe is immersed at a constant rate determined by the ratio Qi -Q2

  sin /: where is OH, is pump capacity;

F is the surface of the oil mirror in the crankcase;

/ 5 is the angle between the axis of the intake manifold and the oil level.

This ensures a smooth contact of the intake pipe with the surface of the oil and an approximate tracking of the decreasing oil level, which creates conditions for a slow increase in the level of oil in the measuring tank and its stabilization after stopping the movement of the intake pipe when filling the measuring tank, which prevents its overflow and, therefore, loss of oil during the measurement.

The drawing schematically shows the proposed device.

The device contains an intake manifold 3 located in the crankcase 1 of the engine 2, mounted in the guides 4 and fastened to the toothed rack 5, which is engaged with the gear wheel 6 placed on the shaft of the electric motor 7, the nozzle 3 is connected in series to the circulation circuit: the intake nozzle 3 flexible pipe 8, pump 9, flexible pipe 10, measuring tank 11, flexible pipe 12 connected to the lower part of measuring tank 11, pump 13 on one shaft with pump 9 and electric motor 14, flexible pipe 15 recirculated qio This tube 16 is placed in the crankcase 1 of the engine 2. The measuring tank 11 is placed on the scale 17 with a scale of 18, the scale pan with the rod 19 is connected to the sliding contact 20 connected to the power supply circuit of the electric motor 7.

A device for measuring the oil consumption in internal combustion engines works as follows.

The pre-intake pipe 3 is moved using a toothed rack 5 and a gear wheel 6, an electric motor 7 on the shaft, whose power supply circuit is closed with the help of sliding contacts 20 and a rod 19, the movement of the inlet pipe 3 is performed at a speed lower than the speed of moving the oil level in the crankcase when pumps 9 and 13 operate at full capacity, i.e.

Vn

 Qi -Q2

F sirT /

where Qi, Qi - the performance of the pumps, and Si Qa;

F is the area of the oil mirror in the crankcase;

/ - the angle between the axis of the intake pipe and the oil in the crankcase.

When the intake pipe 3 reaches the oil surface, it begins to be sucked by the pump 9 and discharged into the measuring tank 11, from where it is pumped back to the crankcase by the pump 13. Since the speeds of movement of the nozzle 3 and the oil level in the crankcase are close, the lower section of the nozzle 3 tracks the oil level in the crankcase when the measuring tank 11 is filled with oil and, therefore, the weighing pan 17 moves and the associated rod 19 breaks the contacts 20, moving the pipe 3 will stop, at this time the flow of oil into the measuring container will also cease, which eliminates the loss of oil during the measurement.

During the measurement, the oil continuously circulates around the circuit: intake connection 3, pump 9, measuring tank 11, pump 13, crankcase 1, while the constant oil level is maintained due to the oil consumption from measuring tank 11, the weight change of which serves as a measure of the oil consumption in internal combustion engine,

Claims (2)

1. A method for measuring the oil consumption in internal combustion engines, which means that the intake pipe is installed in the engine crankcase before it is immersed in oil, maintain a constant level of oil in the crankcase, pumping oil into the measuring container and from the measuring container through another the pipe back to the crankcase, while the oil consumption is determined by the change in the weight of the oil in the measuring container, characterized in that, in order to prevent loss of oil during the measurement process, the intake pipe is moved to 5 1R42242b contact with the oil level 2. Device for measuring flow Vn, determined by the dependence of the oil in internal combustion engines, including intake connection, two nasQ1 -Q2ca of different capacity, measured A p sin 5 B tank mounted on a scale is distinguished where Qi, Q2 is pumped-out, so that, in order to exclude pumping and booster pumps of correspondingly-loss of oil, intake manifold connected with drive in the form of a toothed rack, which The F-area oil of the mirror in the map interacts with the gear wheel, the dawn; 10 an electric motor mounted on the shaft, in a / f-angle between the axis of the intake supply nozzle of which the sliding and a oil mirror in the crankcase.contact associated with the weighing pan.