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Member for internal combustion engine and production method thereof

A technology for internal combustion engines and components, which is applied in the production or manufacture of pistons, components for internal combustion engines, valves, and fuel injection valves, and can solve problems such as nozzle opening blockage and fuel spray control deterioration

Inactive Publication Date: 2009-01-21
NISSAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In particular, for fuel injection valves of in-cylinder direct injection engines, due to the strict dimensional accuracy of components, sediment deposits on the periphery of fuel injection holes cause clogging of nozzle openings, or deterioration of fuel spray control, this has become a problem

Method used

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  • Member for internal combustion engine and production method thereof
  • Member for internal combustion engine and production method thereof
  • Member for internal combustion engine and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Aluminum alloy AC2A was used as the base material of the piston, the surface of the alloy was mirror finished, and then the coating was deposited under the following conditions.

[0068] ●Preprocessing conditions

[0069] Pretreatment gas: argon, under 100 sccm (sccm=cm 3 / min at 25°C and 1.0×10 5 Pa)

[0070] High Frequency Power: 300W at a frequency of 13.56MHz

[0071] Deposition vacuum: 0.1Torr

[0072] Processing time: 5min

[0073] ●Deposition conditions

[0074] Deposition gas source: methane (CH 4 ) gas, fluorocarbon (C 2 f 6 )gas

[0075] High Frequency Power: 300W at a frequency of 13.56MHz

[0076] Deposition vacuum: 0.1Torr

[0077] Deposition rate: 300A / min

[0078] Deposition time: 17min

[0079]The thickness of the film is 0.5 μm, which is obtained from the electron microscope observation image; and in the region from the surface to the depth of 4 nm, the atomic number ratio of the F content to the C content, F / C, is 0.4, which is obtained fr...

Embodiment 2

[0082] SUS420J is used as a base material for valves and fuel injection valves, then their surfaces are mirror-finished, and then the coating is deposited under the following conditions.

[0083] ●Preprocessing conditions

[0084] Pretreatment gas: argon, under 100 sccm (sccm=cm 3 / min at 25°C and 1.0×10 5 Pa)

[0085] High Frequency Power: 300W at a frequency of 13.56MHz

[0086] Deposition vacuum: 0.1Torr

[0087] Processing time: 5min

[0088] ●Deposition conditions

[0089] Deposition gas source: methane (CH 4 ) gas, fluorocarbon (C 2 f 6 )gas

[0090] High Frequency Power: 300W at a frequency of 13.56MHz

[0091] Deposition vacuum: 0.1Torr

[0092] Deposition rate: 250A / min

[0093] Deposition time: 20min

[0094] The thickness of the coating film was 0.5 μm, which was obtained from electron microscope observation images; and the atomic number ratio of F content to C content, F / C, from the surface to a depth of 4 nm was 0.25, which was obtained from XPS analy...

Embodiment 3

[0096] SUS420J is used as a base material for valves and fuel injection valves, then their surfaces are mirror-finished, and then the coating is deposited under the following conditions.

[0097] ●Preprocessing conditions

[0098] Pretreatment gas: argon, under 100 sccm (sccm=cm 3 / min at 25°C and 1.0×10 5 Pa)

[0099] High Frequency Power: 300W at a frequency of 13.56MHz

[0100] Deposition vacuum: 0.1Torr

[0101] Processing time: 5min

[0102] ●Deposition conditions

[0103] Deposition gas source: methane (CH 4 ) gas, fluorocarbon (C 2 f 6 )gas

[0104] High Frequency Power: 300W at a frequency of 13.56MHz

[0105] Deposition vacuum: 0.1Torr

[0106] Deposition rate: 300A / min

[0107] Deposition time: 17min

[0108] The thickness of the coating film was 0.5 μm, which was obtained from electron microscope observation images; and the atomic number ratio of F content to C content, F / C, from the surface to a depth of 4 nm was 0.4, which was obtained from XPS analys...

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Abstract

A member for an internal combustion engine, such as a piston, a valve and a fuel injection valve. The member includes a substrate. A carbon-based coating film is formed on the substrate to cover at least a part of a region of the substrate to which region fuel for the internal combustion engine is contactable. The carbon-based coating film contains fluorine and has a thickness of 10 m or less.

Description

technical field [0001] The present invention relates to a component for an internal combustion engine, a piston, a valve, and a fuel injection valve using the component, and a production or manufacturing method of the component for an internal combustion engine, and more particularly, the present invention relates to a component for an internal combustion engine capable of suppressing deposits , and pistons, valves, and fuel injection valves using the parts, and production or manufacturing methods of the parts for internal combustion engines. Background technique [0002] So-called deposits are formed on components in the combustion chamber of the internal combustion engine due to incomplete combustion of the fuel. Sediment is a highly viscous substance that contains a mixture of carbonized substances (carbon components) of fuel and oxidized fuel colloids, and deposits in the combustion chamber that cause deterioration of fuel consumption or exhaust performance, which has b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/10F02M61/16C23C16/22C23C16/44C21D9/00
Inventor 镰田诚之熊谷宏近藤碧菊地贤司佐川琢円马渕丰中东孝浩
Owner NISSAN MOTOR CO LTD