CN216477519U - Engine crankcase breather - Google Patents

Abstract

The utility model discloses an engine crankcase ventilation device, which comprises a ventilation component and an oil filter box, wherein the ventilation component comprises a ventilation pipe unit and a filter component; the breather pipe unit is arranged on a cylinder cover of the engine; the air pipe unit is of a bent structure; the filtering component comprises an air filter, an oil filtering box is arranged between the air pipe unit and the air filter, and the bottom of the oil filtering box is a slope surface. The breather pipe unit comprises a breather pipe and a breather hose, and the oil filter box is connected with the air filter through the breather hose. A ventilation hose is connected between the ventilation pipe and the oil filter box. The utility model discloses the vertical pipeline and the oil strain box of cylinder head, bending structure's breather pipe unit, oil strain box both sides, the multiple bend structure of formation when guaranteeing that engine oil steam smoothly discharges effectively carries out oil-gas separation, and the lubricating oil of evaporation goes into the engine along pipeline and oil strain box backward flow, has reduced machine oil consumption, has improved empty cleanliness of straining.

Description

Engine crankcase breather

Technical Field

The utility model relates to an engine crankcase especially relates to an engine crankcase breather.

Background

In the running process of the four-stroke piston engine, due to the relative sealing performance of piston rings, a small amount of mixed gas enters the crankcase in the running process of the engine; meanwhile, as the temperature of the engine rises, the gas expands, and the internal gas also needs to be discharged in time; when the engine cools, the gas contracts, requiring fresh mixture make-up into the interior.

The crankcase of a four-stroke engine therefore requires the design of breather holes to ensure proper "breathing" of engine crankcase gases. The four-stroke engine breather is generally arranged on a crankcase and is lower than the heat engine of the engine, so that gas in cavities at the positions of an upper valve transmission device and a cylinder cover is difficult to discharge in time in the running process of the engine. Therefore, how to discharge the gas in the cavity through a specific structure becomes a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the weak point among the prior art, the utility model provides an engine crankcase breather, this breather effectively carries out oil-gas separation when guaranteeing that engine oil steam smoothly discharges.

The technical scheme is as follows: the engine crankcase ventilation device of the utility model comprises a ventilation component and an oil filter box, wherein the ventilation component comprises a ventilation pipe unit and a filter component;

the breather pipe unit is arranged on a cylinder cover of the engine; the air pipe unit is of a bent structure;

the filtering component comprises an air filter, an oil filtering box is arranged between the air pipe unit and the air filter, and the bottom of the oil filtering box is a slope surface.

The breather pipe unit comprises a breather pipe and a breather hose, and the oil filter box is connected with the air filter through the breather hose.

A ventilation hose is connected between the ventilation pipe and the oil filter box.

Still include the long-pending oil box, this long-pending oil box is located empty below straining, and after empty filter core saturation inside straining, lubricating oil will drip downwards and get into in the long-pending oil box.

The oil accumulation box is made of transparent materials so as to be convenient for observing the oil accumulation condition.

Be equipped with the filter core that filters the gas mixture in the air filter, filter the gas mixture through the filter core and cause environmental pollution with the prevention air.

The breather pipe unit is of a spiral or L-shaped structure so as to ensure that oil vapor in the engine is smoothly discharged and oil particles are effectively blocked.

The cylinder head is positioned above the crankcase to facilitate vapor venting.

The breather pipe unit is located above the cylinder head.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

(1) the breathing in the engine is ensured to be smooth, and the oil vapor is discharged in the running process of the engine.

(2) The cylinder cover, the ventilation pipe unit with the bending structure and the vertical pipelines on two sides of the oil filter box form a multiple bend structure, oil-gas separation is effectively carried out while engine oil steam is guaranteed to be smoothly discharged, evaporated lubricating oil can flow back into the engine along the pipelines and the oil filter box again, engine oil consumption is reduced, and the cleanliness of air filtration is improved.

Drawings

Fig. 1 is a schematic structural view of the engine crankcase breather apparatus of the present invention.

Detailed Description

Example (b):

as shown in fig. 1, the engine crankcase breather of the utility model comprises a breather assembly and an oil filter box 4, wherein the breather assembly comprises a breather pipe unit and a filter assembly. The filtering component comprises an air filter 6, and an oil filter box 4 is arranged between the air filter 6 and the air vent pipe unit.

The breather pipe unit is arranged on the cylinder cover 1 and is of a bent structure; and the air pipe unit comprises an air pipe 2 and an air hose, and the oil filter box 4 is connected with the air filter 6 through the air hose. The specific structure is that, the breather pipe 2 is arranged on the cylinder cover 1, and the cylinder cover 1 is positioned at the top of the whole four-stroke engine, so that the oil-gas mixed steam of the crankcase and the heat engine cavity is smoothly discharged out of the engine.

In this embodiment, breather pipe 2 adopts L type structure or curved structure, and cylinder head 1 adds curved structure or the breather pipe 2 structure of L type and effectively blocks the oil particle when guaranteeing that the inside oil vapor of engine smoothly discharges.

The pipes at the two ends of the oil filter box 4 are vertically arranged, and the bottom of the oil filter box 4 is designed into a slope surface, so that the evaporated lubricating oil hung on the pipe wall can continuously flow back to the inside of the engine again along the vertical pipeline and the slope surface.

The above designs can effectively prevent excessive lubricating oil from being discharged along with steam, reduce the consumption of engine oil and improve the cleanliness of the air filter 6.

The method comprises the following steps that a breather pipe 2, a first breather hose 3 and a second breather hose 5 which are originally assembled on a crankcase 7 are assembled on a cylinder cover 1 after the design is changed, when an engine runs, oil vapor in the crankcase 7 reaches the cylinder cover 1 through a cylinder block 8 and a cylinder head 9, the oil vapor passes through a circulating structure in the cylinder cover 1, flows through an L-shaped breather pipe 2 and then enters the first breather hose 3 and the second breather hose 5, an oil filtering box 4 is arranged between the first breather hose 3 and the second breather hose 5 to carry out secondary filtering on the oil vapor, and most of lubricating oil flows back to the interior of the engine through the first breather hose 3, the breather pipe 2 and the cylinder cover 1 after being filtered by the oil filtering box 4; the lubricating oil of the small part enters into the inside of the air filter 6 along with the hot steam, is filtered by the filter element inside the air filter 6 along with the suction of the fresh mixed gas, stays on the filter element inside the air filter 6, and prevents the entering air from causing environmental pollution. After the filter element inside the air filter 6 is saturated, lubricating oil can drop downwards into the oil accumulation box 10, the oil accumulation box 10 is designed to be a transparent soft sleeve, and when oil accumulation begins to exist in the oil accumulation box 10, a driver is prompted to clean or replace the filter element of the air filter 6.

Because the positions of the cylinder cover 1, the cylinder head 9 and the cylinder block 8 are higher than the crankcase 7, oil vapor can be smoothly evaporated upwards from the crankcase 7 along the cylinder block 8 and the cylinder head 9 and filtered by the cylinder cover 1, the breather pipe 2, the first breather hose 3, the oil filter box 4, the second breather hose 5 and the air filter 6, so that smooth breathing of the engine crankcase is ensured, and excessive consumption of lubricating oil is reduced.

Claims (9)

1. An engine crankcase breather device, characterized by: the oil filter box comprises a ventilation assembly and an oil filter box (4), wherein the ventilation assembly comprises a ventilation pipe unit and a filter assembly;

the breather pipe unit is arranged on a cylinder head (1) of the engine; the breather pipe unit is of a bent structure;

the filter assembly comprises an air filter (6), an oil filter box (4) is arranged between the air pipe unit and the air filter (6), and the bottom of the oil filter box (4) is a slope.

2. The engine crankcase breather device of claim 1, wherein: the breather pipe unit comprises a breather pipe (2) and a breather hose, and the oil filter box (4) is connected with the air filter (6) through the breather hose.

3. The engine crankcase breather device of claim 2, wherein: and a ventilation hose is connected between the ventilation pipe (2) and the oil filter box (4).

4. The engine crankcase breather device of claim 1, wherein: the oil filter is characterized by further comprising an oil accumulation box (10), wherein the oil accumulation box (10) is located below the air filter (6).

5. The engine crankcase breather device of claim 4, wherein: the oil accumulation box (10) is made of transparent materials.

6. The engine crankcase breather device of claim 1, wherein: and a filter element for filtering mixed gas is arranged in the air filter (6).

7. The engine crankcase breather device of claim 1, wherein: the air pipe unit is of a spiral or L-shaped structure.

8. The engine crankcase breather device of claim 1, wherein: the cylinder head (1) is higher than the crankcase (7).

9. The engine crankcase breather device of claim 1, wherein: the breather pipe unit is positioned above the cylinder head (1).

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