RU31610U1 - Automotive engine lubrication system - Google Patents

Description

starvation of friction nodes when the boundary oil film is partially or completely destroyed. The proposed lubrication system of an autotractor engine is characterized in that it is equipped with a device for supplying oil to the oil line before starting the engine and maintaining pressure in it during engine starting, as well as a short-term pressure increase during its fall on certain operating conditions of the engine to reduce the coefficient of friction, engine wear and improve starting properties, includes a cylinder divided by with a moving piston into two cavities, the first cavity is connected to the main oil line by a pipe through a tee with an electromagnetic valve, and the electromagnetic valve is constantly closed to the outlet from the cavity and open to the inlet into the cavity, and it controls the opening of the valve of the oil pressure insufficiency in the oil system when there is no or lack of pressure and built into the main oil line, the second cavity of the cylinder is connected to the atmosphere, and it contains springs that compress the piston.

The proposed lubrication system of a tractor engine equipped with a device for supplying oil to the oil line before starting the engine and maintaining pressure in it during start-up provides lubrication of friction units, and also creates conditions for hydrodynamic friction in sliding bearings, heating elements, camshaft connecting rod bearings under hydrodynamic conditions friction adhesive forces inter. the action of rubbing surfaces is not manifested, while the contact of the surfaces and, consequently, their frictional wear are practically excluded (AMobelnitsky Fuel and lubricants. Moscow. Hanging school 198.) The proposed lubrication system also allows maintaining pressure in the main oil line when it falls below the minimum allowable in some operating modes of the engine, which avoids the rupture of the oil film in the friction units.

Under conditions of starting the engine at low temperatures, the device heats up before starting from the battery with an electric heater to provide the necessary oil viscosity and increase pumpability through friction units. Oil starvation to one degree or another always occurs when starting days

the lower the temperature, the more pronounced oil starvation and more engine wear. It follows that by increasing the power of the starting devices of the engine, it is possible to start it, but if measures are not taken to reduce oil starvation, wear during such a start will be unacceptably large until the setting of the rubbing steam and the failure of the engine. (AMObelnitsky Fuel and lubricants. Moscow Higher School 198E.)

This utility model is illustrated in the drawing, which shows a device included in the engine lubrication system in the context. The device consists of a cylinder 1, a piston 2, separating the cylinder and the spring pressing the needle, thereby closing the exit to the main line, the solenoid valve being controlled by an electric oil pressure insufficient sensor in the oil system installed in the oil line. The second cavity 4 is connected to the atmosphere and the springs are located in it 8, pressing piston 2. At engine operating conditions, oil under pressure from the oil line through the tee 5, squeezing the spring and needle E, enters the cavity of the cylinder 3, gradually filling it through the movable piston 2, compresses the springs 8. The springs 8 and the diameter of the piston 2 are designed so that the pressure in the cavity 3 is always higher min. 1mm of permissible oil pressure for a given engine in the main oil line, but lower than the nominal pressure at the engine operating conditions. Thus, the cavity З is filled with oil and is under it under the pressure of the piston 2, since the electromagnetic valve is closed, the needle 9 is pressed to the tee 5 by the spring V and the pressure from the cavity 3. The electromagnetic valve will open when the ignition is turned on and the oil pressure insufficient pressure sensor will show no pressure or lack of pressure in the oil line.

Thus, before starting the engine, the device cavity is filled with oil, and is pressurized under the influence of the piston 2 from the springs B. After the ignition is switched on, the oil pressure insufficient electrode gives a signal about the lack of pressure in the system and the solenoid valve opens by retracting the needle Хг9 into the coil 6, and oil under the piston pressure 2 from cavity 3 enters

4

The complete oil system, fills it and maintains pressure in the system, is sufficient, but the time for the engine to start normally is normal. After starting the engine, the oil pump driven by the crankshaft raises the oil pressure to the working one, the oil pressure insufficiency sensor gives a signal, and the electromagnetic valve closes and cavity 3 it is again filled under the influence of pressure from the oil line. If the oil pressure in the system briefly drops below the minimum allowable, which is possible in operating conditions, the sensor is insufficient STI. the pressure signal, and the solenoid valve opens, and from the cavity 3 under pressure in excess of the minimum allowable oil is supplied to the oil system, maintaining pressure for a short time, and in operating modes the oil again fills the cavity 3 of the device.

For the engine of a VAZ2106 automobile, the volume of the cavity is 3 300 ml., The diameter of the piston 2 is 70 mm. the maximum pressure in the cavity 3 is 0.17MPa, the minimum is 0.1MPa, the time to maintain the pressure in the system is 8-16 seconds depending on the oil temperature is enough to start the engine, a short-term pressure drop during operation is usually no more than 2-3 seconds. devices can be traced by the control lamp of the minimum permissible oil pressure, which are installed on all automotive engines. The volume of the cavity 3 and the pressure of the springs can be changed depending on the engine. Thus, the proposed lubrication system of automotive engines

the gatel allows to provide oil supply to the system. grease before starting and maintain the pressure in it during starting the engine, as well as maintain the pressure in the system at the time of pressure drop in operating conditions, which allows to reduce the friction coefficient in the friction units of the engine, reduce wear, increase the life of the binder. improve its starting properties. Advantages include the simplicity of the device included in the oil system, the possibility of finalizing the oil system of any engine without structural changes in it, as well as the absence of drives from the engine and other mechanisms, which means there is no energy consumption, since filling the cavity of the device is due to excessive performance, as a rule , a gear oil pump having a productivity at operating conditions 2-3 times higher than necessary, and the excess is drained through the bypass valve into the sump.

Claims (1)

The lubrication system of a tractor engine containing an oil tank, oil pumps, oil filters, oil radiators, valves and instrumentation, characterized in that it is equipped with a device for supplying oil to the oil line and maintaining pressure in it before starting and during engine starting , also maintaining the oil pressure in the lubrication system at a level above the minimum acceptable for a short-term drop in some engine operating conditions to reduce the coefficient of friction, wear and To improve the starting properties of the engine, it includes a cylinder divided by a movable piston into two cavities, the first cavity is connected to the main oil line through an electromagnetic valve, which is constantly closed to the outlet from the cavity and open to the inlet to the cavity, and opening to the outlet from the cavity to the main highway controls the electric sensor of insufficient oil pressure in the oil line at the time of absence or insufficient pressure and built into the main oil line, the second cavity of the cylinder is connected to the atmosphere th, and in it are the springs compressing the movable piston.