Low-friction sliding member in transmission, and transmission oil therefor
First Claim
1. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
- a base material having a sliding section; and
a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %,wherein the transmission oil composition comprises at least one organic oxygen-containing compound selected from the group consisting of a monohydric alcohol, a polyhydric alcohol, a carboxylic acid, an ether, a derivative of a monohydric alcohol, a derivative of a polyhydric alcohol, a derivative of a carboxylic acid, a derivative of an ether, a derivative of an ester, the organic oxygen-containing compound being contained in an amount ranging from 0.05 to 3.0% based on total amount of the transmission oil composition, andwherein the transmission comprises a continuously variable transmission.
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Accused Products
Abstract
A low-friction sliding member in a transmission is at least one of sliding members which are in slidable contact with each other in presence of a transmission oil composition. The low-friction sliding member includes a base material having a sliding section. A hard carbon thin film is coated at a sliding surface of the sliding section of the base material. The hard carbon thin film contains hydrogen in an amount not more than 20 atomic %. The transmission oil composition contains at least one of organic oxygen-containing compound and aliphatic amine compound.
370 Citations
8 Claims
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1. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission oil composition comprises at least one organic oxygen-containing compound selected from the group consisting of a monohydric alcohol, a polyhydric alcohol, a carboxylic acid, an ether, a derivative of a monohydric alcohol, a derivative of a polyhydric alcohol, a derivative of a carboxylic acid, a derivative of an ether, a derivative of an ester, the organic oxygen-containing compound being contained in an amount ranging from 0.05 to 3.0% based on total amount of the transmission oil composition, and wherein the transmission comprises a continuously variable transmission.
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2. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission comprises a continuously variable transmission, wherein the transmission oil composition contains at least one of an organic oxygen-containing compound and an aliphatic amine compound, and wherein the transmission oil composition contains an aliphatic amine compound having a hydrocarbon chain having a carbon number ranging from 6 to 30, in an amount ranging from 0.05 to 3.0% by mass based on a total mass of the transmission oil composition.
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3. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission comprises a continuously variable transmission, wherein the transmission oil composition contains at least one of an organic oxygen-containing compound and an aliphatic amine compound, and wherein the transmission oil composition contains at least one member selected from the group consisting of polybutenyl succinimide and a derivative of polybutenyl succinimide. - View Dependent Claims (4)
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5. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission oil composition comprises at least one organic oxygen-containing compound selected from the group consisting of a monohydric alcohol, a polyhydric alcohol, a carboxylic acid, an ether, a derivative of a monohydric alcohol, a derivative of a polyhydric alcohol, a derivative of a carboxylic acid, a derivative of an ether, a derivative of an ester, the organic oxygen-containing compound being contained in an amount ranging from 0.05 to 3.0% based on total amount of the transmission oil composition, and wherein the transmission comprises an automatic transmission.
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6. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission comprises an automatic transmission, wherein the transmission oil composition contains at least one of an organic oxygen-containing compound and an aliphatic amine compound, and wherein the transmission oil composition contains an aliphatic amine compound having a hydrocarbon chain having a carbon number ranging from 6 to 30, in an amount ranging from 0.05 to 3.0% by mass based on a total mass of the transmission oil composition.
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7. A low-friction sliding member in a transmission, the sliding member being at least one of a plurality of sliding members which are in slidable contact with each other in the presence of a transmission oil composition, the low-friction sliding member comprising:
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a base material having a sliding section; and a hard carbon thin film coated at a sliding surface of the sliding section of the base material, the hard carbon thin film containing hydrogen in an amount not more than 20 atomic %, wherein the transmission comprises an automatic transmission, wherein the transmission oil composition contains at least one of an organic oxygen-containing compound and an aliphatic amine compound, and wherein the transmission oil composition contains at least one member selected from the group consisting of polybutenyl succinimide and a derivative of polybutenyl succinimide. - View Dependent Claims (8)
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Specification