Exhaust valve seat for automobile engine

A technology for automobile engines and exhaust valves, applied to engine components, machines/engines, mechanical equipment, etc., can solve problems such as increased tool wear, increased scrap rate and cost, and reduced tool life, achieving production cost advantages and low cost Effect

Inactive Publication Date: 2010-05-12
CHONGQING CHANGAN AUTOMOBILE CO LTD
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In response to this high requirement, copper-infiltrated exhaust valve seats are generally used, and the proportion of copper in the material reaches more than 10%. However, due to the influence of the copper-infiltrated process, the hardness of the exhaust valve seat will increase, and the h

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
  • Exhaust valve seat for automobile engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: adopt the material of following chemical composition content to make engine exhaust valve seat: (weight percentage)

[0015] C: 1.08%, Mo: 6.58%, Cr: 3.5%, Co: 5.51%, Ni: 2.28%, V: 0.72%, Cu0.56%, and the rest Fe.

[0016] The production process is:

[0017] Ingredients → forming → sintering → machining → external inspection → packaging.

[0018] 250 times the metallographic structure of the exhaust valve seat made by figure 1 shown.

Embodiment 2

[0019] Example 2: C: 1.12%, Mo: 6.6%, Cr: 3.55%, Co: 5.54%, Ni: 2.31%, V: 0.7%, Cu0.55%, and the rest Fe.

[0020] The manufacturing process is the same as example 1.

[0021] The above-mentioned exhaust valve seat is suitable for high-performance supercharged engines with a displacement of 1.8L and above, and has the characteristics of low cost and high performance.

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

No PUM Login to view more

Abstract

The invention relates to an exhaust valve seat for an automobile engine, which is made of a material containing chemical compositions. The material comprises the following chemical compositions in percentage by weight: 0.7 to 1.4 percent of C, 3.0 to 6.6 percent of Mo, 3.0 to 6.6 percent of Cr, 5.0 to 8.5 percent of Co, 1.2 to 3.0 percent of Ni, 0.2 to 1.0 percent of V, less than or equal to 1.0 percent of Cu, and the balance of Fe. The exhaust valve seat made of the material has high crushing strength and fatigue strength and reliable quality, has lower cost than a copper-infiltrated valve seat, and meets the requirements of high-performance engines.

Description

technical field [0001] The invention relates to an exhaust valve seat for an automobile engine. Background technique [0002] The exhaust valve seat is an important part of the engine. It must not only cooperate with the intake port to form an airflow that is conducive to combustion, but also form a seal with the valve and be resistant to high temperature, high pressure and wear. Especially for CNG gas engines and supercharged engines, the exhaust valve seat has higher requirements because there is no lubrication of fuel and volatilization and heat absorption. When the exhaust valve reaches 900°C, the temperature of the exhaust valve seat can reach 400°C. [0003] In response to this high requirement, copper-infiltrated exhaust valve seats are generally used, and the proportion of copper in the material reaches more than 10%. However, due to the influence of the copper-infiltrated process, the hardness of the exhaust valve seat will increase, and the hardness can reach 45HRC...

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
IPC IPC(8): F01L3/02
Inventor 王锐韦颂陈彦成卫国
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap