Unlock instant, AI-driven research and patent intelligence for your innovation.

Aluminum alloy engine crankcase without cylinder sleeve

An aluminum alloy and engine technology, applied in the direction of engine components, machines/engines, cylinders, etc., can solve problems such as unqualified metallography and difficult production processes, achieve fewer production processes, avoid the increase of processes and their costs, and reduce heat dissipation. The effect of field uniformity

Inactive Publication Date: 2009-09-23
重庆三华工业有限公司
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the scrap rate, it can be seen that tensile waste, unqualified metallographic, inner pores, porosity, and processing waste are the main waste factors. The current production process is difficult to solve, so it is a trend to improve the cylinder liner

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aluminum alloy engine crankcase without cylinder sleeve
  • Aluminum alloy engine crankcase without cylinder sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Melting: first add aluminum alloy scrap and aluminum alloy scraps to the melting furnace. Then add aluminum ingots, when the aluminum ingots are completely melted, when the furnace temperature is 720°C to 760°C, add Mg, Si, Cu, Fe, Mn, Zn, Sn, Ni, Pb, Cr and rare earth into the melting furnace, each of which The weight percentage of the composition is: Si12.4%, Cu2.75%, Fe0.75%, Zn2%, Mn0.18%, Sn0.05%, Mg0.13%, Pb0.15%, Ni0.3%, Cr0 .13%, rare earth 0.1%, and the balance is Al.

[0030] Refining: At a temperature between 720°C and 760°C, add refining agent, fully stir, remove slag and ash, and the refining time is 40 minutes to 60 minutes.

[0031] The mold is die-casted: the casting temperature is 640°C-660°C, and the casting speed is 60 milliseconds / minute.

[0032] Artificial aging: heat the cylinder liner aluminum alloy engine crankcase to a temperature of 268°C to 278°C for stress relief annealing to remove residual stress.

[0033] Machining: Use special equipme...

Embodiment 2

[0036] Embodiment 2 of the present invention is the same as Embodiment 1, and the only difference is that the weight percentages of the components in the aluminum alloy are different. The weight percentages of the aluminum alloy components in Embodiment 2 are: Si11.55%, Cu2%, Fe0 .4%, Zn1%, Mn0.1%, Sn0.01%, Mg0.1%, Pb0.1%, Ni0.1%, Cr0.01%, rare earth 0.1%, and the balance is Al.

Embodiment 3

[0038] Example 3 of the present invention is the same as Example 1, the only difference is that the weight percentages of the components in the aluminum alloy are different, and the weight percentages of the aluminum alloy components in Example 3 are: Si13.25%, Cu3.5% , Fe1.05%, Zn3%, Mn0.35%, Sn0.1%, Mg0.25%, Pb0.2%, Ni0.3%, Cr0.05%, rare earth 0.1%, and the balance is Al.

[0039] The present invention does not have cylinder liner cylinder block and has liner cylinder block engine performance comparison:

[0040] project

[0041] Cast aluminum alloy mechanical properties in the present invention:

[0042] aluminum alloy

[0043] Since the present invention uses a special aluminum alloy to cast the cylinder block, various performance indicators of the cylinder block are superior to boron-titanium cast iron sleeves, so the piston is directly positioned in the cylinder body and slidably matched with the inner wall of the cylinder body, which can solve the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Brinell hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an aluminum alloy engine crankcase without a cylinder sleeve, which comprises a case, a cylinder block and a piston, wherein the cylinder block is positioned at the upper right end of the case; the piston is positioned inside the cylinder block and matched with the inner wall of the cylinder block in a sliding way; the case and the cylinder block are integrally molded by using aluminum alloy; and the aluminum alloy is prepared by the components according to the following weight percentages and mixture ratios: 11.55-13.25% of Si, 2-3.5% of Cu, 0.4-1.05% of Fe, less than or equal to 3% of Zn, 0.1-0.35% of Mn, less than or equal to 0.1% of Sn, less than or equal to 0.25% of Mg, less than or equal to 0.20% of Pb, less than or equal to 0.5% of Ni, 0.01-0.15% of Cr, rare earth and the balance of Al. The aluminum alloy engine crankcase without the cylinder sleeve has good aluminum alloy mechanical properties, tensile strength greater than or equal to 260MP, yield strength greater than or equal to 240MP, good abrasion resistance, long service life, simpler product processing technique and lower manufacturing cost.

Description

technical field [0001] The invention relates to an engine, in particular to a cylinder liner-less aluminum alloy engine crankcase. technical background [0002] The crankcase is widely used in various engines and is an indispensable and important part of the engine. The service time of the cylinder block in the engine crankcase is the main factor affecting the life of the engine and the interval between overhauls. The main reason for the short service time of the crankcase cylinder block is due to the severe friction between the piston and the inner wall of the cylinder in the heavy-duty high-temperature environment during use. wear and tear. In order to make the engine cylinder block have better machinability and heat dissipation performance, the crankcase cylinder block is mostly made of metal aluminum. Under high temperature conditions, the yield strength and hardness of metal aluminum show an obvious downward trend with the increase of temperature, and the high tempera...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02F7/00F02F1/00C22C21/02
Inventor 程福刚丁吉全
Owner 重庆三华工业有限公司