Lubrication route 10 of the automotive engine lubrication system

The line is: oil pan - oil pump - filter - cylinder block - oil dispersion - oil pan.

The lubrication of the engine is achieved by the lubrication system. The basic task of the lubrication system is to continuously supply lubricating oil to the friction surface of each part to reduce the friction and wear of the parts. Although the lubrication system does not participate in the conversion of engine functions, it can ensure the normal operation of the engine and make it have a long service life.

Hello, although the engine model is different, but the lubrication route is the same, roughly like this:

The oil of the oil pan enters the oil pump through the filter screen of the oil pump (scientific name is the filter), and after the pressurization of the oil pump, it first passes through the oil filter element and then to the large tile position of the crankshaft, and then divides into two ways.

The small tile is lubricated all the way through the crankshaft (there is an oil passage inside the crankshaft), after which the oil flows into the oil pan.

The other way passes through the cylinder block to the cylinder head and then to the position of the fixed rocker shaft (when disassembling the engine, you can see that there are oil channels where the rocker arm is fixed) through the rocker shaft, (there are also oil passages inside the rocker shaft) to lubricate all the rocker arms, and finally through the large oil holes on the cylinder head and cylinder block, it flows into the oil pan, and it has been circulating.

Oil pan - filter collector - oil pump - pressure limiting valve - oil filter - main oil circuit - oil manifold - oil pan. (The bypass valve is on top of the pressure limiter and the oil filter, and they are connected).

Hello! I am doing this industry! Do you want to know how the engine oil circuit goes?

Generally! The oil is not at the bottom of the engine, there is a filter! Generally, it is sucked into the oil pump! Enter the oil filter! Filtered into the engine's block! And Ganggai! Thank you, it's that simple!

1.Pressure lubrication.

Relying on the way of conveying the boosted oil to the surface of the moving parts for lubrication, some parts of the engine with large load and relatively high speed, such as crankshaft bearings, connecting rod shaft bearings, camshaft bearings, rocker arm shafts (high position) and other parts adopt pressure lubrication.

2.Splash lubrication.

Relying on the way that the oil droplets and oil mist splashed up by some moving parts of the engine (mainly crankshaft and camshaft) lubricate the friction surface, the exposed surface on the engine, the surface with small load such as cam, eccentric wheel, tappet, piston pin, connecting rod small head and other parts adopt splash lubrication In order to prevent a large amount of lubricating oil from entering the combustion chamber, splash lubrication is also adopted between the piston and the cylinder wall.

3.Lubricate regularly.

Rely on the regular grease lubrication mode, for some scattered, less load parts such as engine water pump bearings, generators, starters and distributor assemblies and so on adopt regular lubrication, at present, the engine lubrication system mostly adopts the comprehensive way of pressure lubrication and splash lubrication, regular lubrication does not belong to the category of lubrication system,

The lubrication strength of each part of the engine depends on the environment, relative movement speed of the part and the size of the mechanical and thermal load.

There are four types of lubrication.

Pressure lubrication: Pressure lubrication is the use of oil pressure to transport oil to various friction surfaces for mandatory lubrication, such as crankshaft main bearings, connecting rod bearings and camshaft bearings, etc., which need to convey the oil to the gap of the friction surface with a certain pressure.

Splash lubrication: The operation of the crankshaft is used to throw the oil out from both sides of the bearing, forming many oil droplets or oil mist in the crankcase, and splashing on the friction surface for lubrication, such as cylinder walls, piston pins, etc.

Integrated lubrication (combination of pressure and spatter): This method is widely used in modern car engines.

Grease lubrication: Engine accessories such as generators, water pumps and other bearings are grease lubricated, which need to be regularly filled or cleaned and replaced.

Splash Lubrication: Works with the engine.

Regular lubrication: Lubrication is carried out by means of regular filling of grease.

Pressure lubrication: The oil pump is used to deliver a certain pressure of lubricating oil to the friction surface of the part.

There are three types of lubrication, the first is splash lubrication, the second is regular lubrication, and the third is pressure lubrication.

There are three types of engine lubrication methods for cars: pressure, splash lubrication, and grease lubrication.

What are the lubrication methods of automobile engine lubrication system? Most of the automobile engine lubrication system is organic oil pump, and a small part of the lubrication is based on splash lubrication.

The lubrication method of automobile engine is now mainly the way of oil printing, which uses oil and air pressure for circulating lubrication

Does lubrication and maintenance be included in the maintenance of the car? How often should the lubrication and maintenance of the car be done?

In this system, the main journal, crank pin, cam journal and intermediate shaft (transmission shaft of distributor and oil pump) journal of the crankshaft are pressure-lubricated, and the rest is splash lubricated or grease-lubricated.

When the engine is working, the oil is pumped from the oil pan through the filter collector to the oil filter. If the oil pressure is too high, the oil returns to the oil pump inlet through the safety valve on the oil pump. All the oil is filtered through the filter and then enters the main engine oil duct.

There is a bypass valve on the filter cover, and when the filter is blocked, the oil enters the main oil channel directly through the bypass valve without filtering through the filter. The oil enters five oil distribution channels through the main oil channel, and lubricates the five main bearings respectively. The oil then flows through the inclined oil channel on the crankshaft from the main bearing to the connecting rod bearing to lubricate the connecting rod journal.

Part of the oil in the main oil duct is supplied through the sixth oil separator, "the rear bearing of the intershaft." The front bearing of the intermediate shaft is lubricated by an oil passage at the oil filter outlet. Another oil distribution channel of the main oil passage leads directly to the lubricating oil channel of the camshaft bearing, and this oil channel also has five oil distribution channels, which supply oil to the five camshaft bearings respectively.

At the rear end of the camshaft bearing lubricating oil channel, that is, at the end of the entire pressure lubricating oil circuit, there is a minimum oil pressure alarm switch. When the engine starts, the oil pressure is low, the minimum oil pressure alarm switch contact is closed, and the oil pressure indicator light is on. When the oil pressure exceeds 31kpa, the minimum oil pressure alarm switch contact is disconnected and the indicator light is off.

In addition, the oil filter is also equipped with an oil pressure switch, when the engine speed exceeds 2150r, if the oil pressure is lower than 180kpa, then the switch contact is closed, the alarm light flashes, and the buzzer sounds the alarm.

There are three types of engine lubrication: pressure lubrication, splash lubrication, and gravity lubrication. Pressure lubrication is the use of oil pump to force the lubricating oil to the friction surface, the general work of the force is relatively large and the relative speed of the movement of the parts are used pressure lubrication, if it is helpful to you, I hope you, thank you.

1. Splash lubrication: The oil droplets splashed up when the crankshaft and camshaft and other moving parts rotate or sprayed from the oil hole on the connecting rod head are used to lubricate the friction surface. The objects of lubrication are cylinder walls, cams, piston pins, etc.;

2. Regular lubrication: Lubrication is carried out by regular filling of grease. The objects of lubrication are mainly generators, starters, water pump bearings, etc.;

3. Pressure lubrication: The oil pump is used to send a certain pressure of lubricating oil to the friction surface of the parts to form an oil film with a certain thickness and can withstand a certain mechanical load to achieve reliable lubrication. It mainly satisfies the lubrication of parts with high relative speed and large mechanical load on the engine.

Due to the different working modes of the engine, different lubrication methods are used for the transmission parts with different loads and relative movement speeds.

1) Pressure lubrication:

Pressure lubrication is a lubrication method that supplies lubricating oil to a friction surface under a certain pressure. This method is mainly used for the lubrication of friction surfaces with heavy loads, such as main bearings, connecting rod bearings, camshaft bearings, etc. The lubrication is reliable, the effect is good, and it has a good cleaning and cooling effect on the friction surface.

2) Splash lubrication:

A lubrication method that uses oil droplets splashed by certain moving parts of the engine to lubricate friction surfaces.

3) Grease lubrication:

For some less important and scattered parts, it is necessary to add grease regularly for lubrication. In automobile engines, the mixed lubrication method is mainly pressure lubrication, supplemented by splash lubrication and grease lubrication.

When choosing a lubrication method, the following aspects should be mainly considered:

1) The performance of the lubricating medium;

2) load characteristics and size;

3) Operating temperature;

4) the magnitude of the movement speed;

5) The temperature of the working environment;

6) Structural characteristics and lubrication methods of friction pairs.

When the engine is working, the friction surface (such as crankshaft journal and bearing, camshaft journal and bearing, piston ring and cylinder wall, timing gear pair, etc.) moves relative to each other at a high speed, and the friction between the metal surfaces not only increases the power consumption inside the engine, but also makes the working surface of the parts wear out rapidly; The heat generated by friction can also melt the surface of certain working parts, preventing the engine from functioning properly. Therefore, in order to ensure the normal operation of the engine, it is necessary to lubricate the surface of the relative moving parts in the engine, that is, to cover the friction surface with a layer of lubricant (oil or grease), so that a thin oil film is spaced between the metal surfaces, so as to reduce frictional resistance, reduce power loss, reduce wear and tear, and prolong the service life of the engine.

Lubrication method: Because the working conditions of the engine transmission parts are not the same, different lubrication methods are used for the transmission parts with different loads and relative movement speeds.

Pressure lubrication. Pressure lubrication is a lubrication method that feeds engine oil into the friction surface at a certain pressure. This method is mainly used for lubrication of friction surfaces with large loads, such as main bearings, connecting rod bearings and cam bearings.

Splash lubrication. The lubrication method of lubricating the friction surface by using the oil droplets or oil mist splashed by moving parts when the engine is working is called splash lubrication. This force type is mainly used to lubricate the working surface of the cam, tappet, valve stem and rocker arm of the cylinder wall and valve mechanism with light load.

Grease lubrication.

Lubricate the working surfaces of the zero-shi, such as water pumps and generator bearings, by regularly filling the grease nipples.

What are the lubrication methods of the engineThe main lubrication methods of the engine are: 1. Splash lubrication: the use of oil droplets splashed up when the crankshaft and camshaft and other moving parts rotate when the engine is working or sprayed from the oil hole set on the connecting rod head, and lubricate the friction surface.

The objects of lubrication are cylinder walls, cams, piston pins, etc.; 2. Regular lubrication: Lubrication is carried out by regular filling of grease. The objects of lubrication are mainly generators, starters, water pump bearings, etc.; 3. Pressure lubrication

The oil pump is used to send a certain pressure of lubricating oil to the friction surface of the parts to form an oil film with a certain thickness and can withstand a certain mechanical load, so as to achieve reliable lubrication. It mainly satisfies the lubrication of parts with high relative speed and large mechanical load on the engine.