CN201377344Y - Oil-gas balance hole structure of engine - Google Patents

Abstract

The utility model discloses an oil-gas balance hole structure of engine, which is arranged on a cylinder body of an engine, an oil-gas balance hole is arranged on the upper portion of a bearing seat between two adjacent cylinders, and is communicated with adjacent crankcase cavities arranged between the two cylinders arranged on the upper portion of the crankshaft and on the lower portion of the cylinder sleeve. The shape of the oil-gas balance hole is similar to a fan shape, the area of the cross section is 900 square millimeters, and the oil-gas balance hole is directly casted and shaped. The oil-gas balance hole structure can effectively solve the problem of unsmooth oil-gas flow among all cylinders in a crankcase of the engine, balances pressure between cylinders in the inner cavity of the crankshaft in real time, reduces resistance of motion of a piston, does not simultaneously affect the structure intensity of the cylinder body, and has simple technology, high reliability and low cost.

Description

A kind of engine oil gas equalizing orifice structure

Technical field

The utility model relates to a kind of gas and oil equilibration hole structure, relates in particular to the gas and oil equilibration hole structure that a kind of diesel engine cylinder body uses.

Background technique

At present, increasingly stringent along with the engine emission requirement, crankcase requires forced ventilation, this has proposed very high requirement to the air pressure balance between each cylinder of crankcase inside, if the oil gas circulation is not smooth between interior each cylinder of crankcase, moving up and down of piston will produce bigger resistance, thus the loss that produces power; Simultaneously, the pressure change that piston high speed uplink and downlink cause causes the lubricant oil of each cylinder crankshaft lower box part to form mist of oil and foam, and the oil gas circulation freely certainly will not form more mist of oil and foam, causes the Oil-gas Separation difficulty, directly has influence on the crankcase ventilation effect.

The model utility content

The purpose of this utility model provides that a kind of to solve in the engine crankcase between each cylinder the oil gas circulation not smooth, pressure between in good time balance crankshaft box cavity cylinder and the cylinder, reduce the piston motion resistance, can not have influence on the gas and oil equilibration hole structure that technology is simple, reliability is high, cost is low of the structural strength of cylinder block simultaneously.

For solving the problems of the technologies described above, the utility model provides a kind of gas and oil equilibration hole structure, be positioned on the cylinder block of motor, the gas and oil equilibration hole is located at bearing support top (specifically crossing between the nail hole at two construction bolts above the bearing support) between two adjacent cylinder, and is communicated with adjacent crankcase chamber between cylinder liner below bent axle top cylinder and cylinder.The gas and oil equilibration hole shape can be almost fan, and opening is towards cylinder liner, and section area is 900 square millimeters, fan-shaped angle 40 degree in gas and oil equilibration hole, and 29 millimeters of bottom width, 27 millimeters of height overalls, 29 millimeters of arc top radius Rs, 4 angles are the R5 millimeter; And direct casting.

Owing to adopt above-mentioned technological scheme, the utlity model has following beneficial effect:

1. simple in structure, production technology is good;

2. low cost of manufacture;

3. do not influence block structure intensity;

4. it is enough to be communicated with section area, links up well between each cylinder, and air-flow is unobstructed.

Description of drawings

Fig. 1 is that the three-dimensional axle of engine cylinder of the present utility model is surveyed schematic representation;

Fig. 2 is an engine oil gas equalizing orifice structure longitudinal sectional drawing of the present utility model;

Fig. 3 is an engine oil gas equalizing orifice structure transverse cross-sectional view of the present utility model;

Fig. 4 is an engine oil gas equalizing orifice structure front view of the present utility model.

Mark the following drawings mark thereon in conjunction with the accompanying drawings:

1-crankcase chamber; The 2-bearing support; 3-gas and oil equilibration hole; The 4-cylinder sleeve.

Embodiment

As shown in Figures 1 to 4, above the bearing support 2 between two adjacent crankcase chambeies 1, adjacent two cylinder sleeves, 4 below cast through holes obtain gas and oil equilibration hole 3, and it is communicated with two adjacent crankcase chambeies 1.A plurality of gas and oil equilibrations hole 3 is positioned on the same axis, has just formed the big cavity of a connection like this in the cylinder liner lower end, can produce buffer function to the air pressure of piston up-down.The shape in gas and oil equilibration hole 3 is seen Fig. 3.

Gas and oil equilibration hole 3 connects adjacent crankcase chamber 1.If motor is 4 cylinders, then need to offer 3 gas and oil equilibration holes; As be that 6 Cylinder engines then need to offer 5 gas and oil equilibration holes.

The utility model project organization is simple, low cost of manufacture, and effect is obvious, and the reliability height is applicable to various motors.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technological scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to the above embodiments,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technological scheme and the improvement thereof of spirit and scope of the present utility model, all should be encompassed in the claim scope of the present utility model.

Claims (4)

1, a kind of engine oil gas equalizing orifice structure is positioned on the cylinder block of motor, it is characterized in that, described gas and oil equilibration hole is located at bearing support top between two adjacent cylinder, and is communicated with adjacent crankcase chamber between cylinder liner below bent axle top cylinder and cylinder.

2, engine oil gas equalizing orifice structure according to claim 1 is characterized in that, described gas and oil equilibration hole shape is almost fan, and opening is towards cylinder liner.

3, engine oil gas equalizing orifice structure according to claim 1 and 2 is characterized in that, the section area in described gas and oil equilibration hole is 900 square millimeters.

4, engine oil gas equalizing orifice structure according to claim 1 and 2 is characterized in that, the direct casting in described gas and oil equilibration hole.

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