CN200982238Y

CN200982238Y - Automobile engine piston employing agile fuel

Info

Publication number: CN200982238Y
Application number: CN 200620136321
Authority: CN
Inventors: 张红军
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-11
Filing date: 2006-12-11
Publication date: 2007-11-28
Anticipated expiration: 2016-12-11

Abstract

The utility model relates to an automobile engine piston applicable to the flexible fuel, which comprises a piston top, a piston head and a piston skirt, wherein the piston top is flat or convex globe; the flat piston top is positioned with a plurality of prominent concentric rings from the central point outward; the convex globe piston top is positioned with a plurality of prominent concentric ring from the central point outward. The utility model meets the requirement that the burning point of the flexible fuel is generally higher than that of the gasoline and makes the flexible fuel with high burning point capable of burning in the combustion chamber to provide power for the automobile. The flexible fuel stated can be the anhydrous ethanol, the methanol and the optional-proportion mixing fuel of anhydrous ethanol and gasoline, and the optional-proportion mixing fuel of methanol and gasoline.

Description

Be applied to the motor car engine piston of flexible fuel

Technical field

The utility model relates to a kind of piston, particularly a kind of motor car engine piston that is applied to flexible fuel.

Background technique

For a long time, problems such as motor car engine piston wear, " expand cylinder " are perplexing the driver always, piston at high temperature, high pressure, at a high speed, work under the condition of insufficient lubrication.Piston directly contacts with high-temperature gas, and transient temperature can reach more than the 2500K, and therefore, it is serious to be heated, and radiating condition is very poor, so temperature is very high during pistons work, the top is up to 600～700K, and temperature distribution is very inhomogeneous; It is very big that piston head bears gas pressure, expansion space stroke pressure maximum particularly, and petrol engine is up to 3～5MPa, and diesel engine is up to 6～9MPa, and this just makes piston produce to impact, and bears the effect of side pressure; (8～12m/s) to-and-fro motion, and speed changes constantly, this has just produced very big inertial force to piston, makes piston be subjected to very big additional load with very high speed in cylinder.Piston is worked under this harsh conditions, can produce distortion and accelerated wear test, also can produce additional load and thermal stress, is subjected to the chemical corrosion effect of combustion gas simultaneously.

The function of engine piston is to bear gas pressure, and passes to connecting rod by wrist pin and order about crankshaft rotating, and piston head still is the constituent element of firing chamber.Piston can be divided into three parts, piston head, piston crown and piston skirt.Piston head bears gas pressure, and it is the constituent element of firing chamber, its shape, position, big or small all relevant with the concrete form of firing chamber.

In the petrol engine of automobile, the concave head piston structures that adopt more, the liter of mark day by day along with gas price, more and more need to adapt to the piston structure of other flexible fuel, satisfy the needs that the flexible fuel burning-point generally is higher than the gasoline burning-point, make the flexible fuel of high burning-point that the power of automobile also can be provided in combustion chambers burn.Here said flexible fuel can be anhydrous alcohol, methyl alcohol, anhydrous alcohol and gasoline arbitrarily than fuel combination and methyl alcohol and gasoline arbitrarily than fuel combination etc.

The model utility content

Technical problem to be solved in the utility model is at deficiency right in the prior art, and a kind of motor car engine piston that is applied to flexible fuel is provided, and by dwindling the space of firing chamber, improves the sudden forces of firing chamber, is convenient to light the fuel of high burning-point.

For this reason, the utility model provides a kind of motor car engine piston that is applied to flexible fuel, comprises piston head, and piston crown and piston group portion is characterized in that, described piston head is a sphere flat or projection.

In the technique scheme, described flat piston head outwards is provided with the concentric ring of a plurality of projections from central point; The spherical piston top of described projection outwards is provided with the concentric ring of a plurality of projections from central point.

The utility model is by having reduced the space of firing chamber, improve the validity and the sudden forces of work done, improved the burning-point of cylinder body, be convenient to light the fuel of high burning-point, as flexible fuel, comprise that anhydrous alcohol, methyl alcohol, gasoline, anhydrous alcohol and gasoline use than the occasion of fuel combination etc. arbitrarily.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Fig. 1 is the front view of the utility model flat head piston;

Fig. 2 is the plan view of Fig. 1 for Fig. 2;

Fig. 3 is the front view at the spherical piston top of the utility model projection;

Fig. 4 is the plan view of Fig. 3.

Embodiment

Fig. 1 is the front view of the utility model flat head piston.Fig. 2 is the plan view of Fig. 1.As shown in Figure 1, 2, the utility model is a kind of motor car engine piston that is applied to flexible fuel, comprises piston head 1, piston crown 2 and piston group portion 3, wherein, piston head 1 is flat, flat piston head outwards is provided with a plurality of projections from central point a concentric ring 4.

Fig. 3 is the front view at the spherical piston top of the utility model projection.Fig. 4 is the plan view of Fig. 3.Shown in Fig. 3,4, the utility model is a kind of motor car engine piston that is applied to flexible fuel, comprises piston head 1, piston crown 2 and piston group portion 3, wherein, piston head 1 is the sphere of projection, and the spherical piston top of projection outwards is provided with the concentric ring 4 of a plurality of projections from central point.

The concentric ring section of projection is the semicircle arcuation.Can increase the surface strength of piston like this, increase the service life, improve the validity of work done, and guiding that can science.

It should be noted last that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.

Claims

1. a motor car engine piston that is applied to flexible fuel comprises piston head, and piston crown and piston group portion is characterized in that, described piston head is a sphere flat or projection.

2. the motor car engine piston that is applied to flexible fuel according to claim 1 is characterized in that, described flat piston head outwards is provided with the concentric ring of a plurality of projections from central point.

3. the motor car engine piston that is applied to flexible fuel according to claim 1 is characterized in that the spherical piston top of described projection outwards is provided with the concentric ring of a plurality of projections from central point.

4. according to claim 2 or the 3 described motor car engine pistons that are applied to flexible fuel, it is characterized in that the concentric ring section of described projection is the semicircle arcuation.