Sliding mechanism
AssigneeNissan Motor Co., Ltd.
InventorsYoshinori Izawa, Yutaka Mabuchi
Life of this patent
Estimating the term…
Abstract
A sliding mechanism 1 includes a first sliding member 10 and a partner second sliding member 20 configured to slide relative to the first sliding member 10. The first sliding member 10 includes a matrix phase 11 and a hard phase 13 that is harder than the matrix phase 11, in which the hard phase 13 is embedded in the matrix phase 11 in a dispersed state. The second sliding member 20 includes a base 21 and a surface-treatment layer 23 that is formed on the sliding surface 20 of the base 21 and is harder than the matrix phase 11.
Claims20
A sliding mechanism for an internal combustion engine, comprising:
- a first sliding member comprising at least one of a valve guide or a valve sheet of the internal combustion engine;
- and
- a partner second sliding member comprising a valve of the internal combustion engine and configured to slide relative to the first sliding member, wherein
- the first sliding member consists of a continuous matrix phase and a hard phase that is harder than the continuous matrix phase, in which the hard phase is embedded in the continuous matrix phase in a dispersed state,
- the continuous matrix phase is composed of
- a copper alloy that contains iron as solid solution, or
- a copper alloy that contains iron as solid solution and zinc or tin in an amount of 5 to 20 mass %,
- the hard phase is composed of an iron alloy,
- the second sliding member is harder than the continuous matrix phase, and
- a mass ratio of copper to a total mass of copper and iron in the first sliding member is from 0.5 to 0.95.
A sliding mechanism for an internal combustion engine, comprising:
- a first sliding member comprising at least one of a valve guide or a valve sheet of the internal combustion engine;
- and
- a partner second sliding member comprising a valve of the internal combustion engine and configured to slide relative to the first sliding member, wherein
- the first sliding member comprises a continuous matrix phase and a hard phase that is harder than the continuous matrix phase, in which the hard phase is embedded in the continuous matrix phase in a dispersed state,
- the continuous matrix phase is comprised of
- a copper alloy that contains iron as solid solution, or
- a copper alloy that contains iron as solid solution and zinc or tin in an amount of 5 to 20 mass %,
- the hard phase is comprised of an iron alloy,
- the second sliding member is harder than the continuous matrix phase, and
- a mass ratio of copper to a total mass of copper and iron in the first sliding member is from 0.5 to 0.95.
Dependencies are inferred from the claim text.