Title:
耐キャビテーションディーゼルシリンダライナおよび液冷シリンダブロック
Document Type and Number:
Japanese Patent JP5390097
Kind Code:
B2
Abstract:
A wet-style cylinder liner ( 16 ) for a diesel engine is provided with a surface texture ( 28 ) to combat the effects of cavitation-induced erosion. The surface texture ( 28 ) can be formed as a coating ( 30 ) of manganese phosphate applied about the outer surface ( 26 ) of the cylinder liner ( 16 ) within the coolant flow passage ( 20 ) of the engine. The manganese phosphate is applied in such a manner that a crystalline structure of 2-8 mum average grain size, blocky in nature, clearly faceted, with no cauliflower-like formations and a discernable channel network surrounding the crystals is formed. This crystalline structure works with the natural adhesion and surface tension effects within the liquid coolant to create a stagnant fluid layer about the outer surface ( 26 ) of the cylinder liner ( 16 ). The stagnant fluid layer functions like a self-healing armor plate. When rapid flexing of the cylinder liner ( 16 ) produces cavitation bubbles, these bubbles are held at a distance from the outer surface ( 26 ) by the stagnant fluid layer. As the bubbles implode, their kinetic energy is dissipated within the stagnant fluid layer instead of directly upon the outer surface ( 26 ) of the cylinder liner ( 16 ). The manganese phosphate coating ( 30 ) acts as a labyrinth to anchor water molecules, or the engine coolant, and thus promote formation of the stagnant fluid layer.
Inventors:
Azebed, Miguel
Application Number:
JP2007531461A
Publication Date:
January 15, 2014
Filing Date:
September 14, 2005
Export Citation:
Assignee:
Federal-Mogul Corporation
International Classes:
F02F1/00; F02F1/16; F16J10/04
Domestic Patent References:
| JP62258155A |
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda