Mitsubishi Heavy Industries Limited

Jx Nippon Oil Energy Corporation

Eneos Corporation

Kohei Masuda

Hitoshi Komatsubara

Hajime Nakao

Keiko Ishikawa

Masaaki Itou

Yoshiki Ishikawa

Haruko Nagai

Yasuhiko Fukuyama

Tomohiro Komine

Mayuko Sumiya

A lubricating oil composition for a transmission, the composition including: (A) a lubricant base oil comprising a mineral base oil and/or a synthetic base oil; and (B) a poly(meth)acrylate having a weight average molecular weight of no more than 25,000, wherein the composition has a kinematic viscosity at 100&#xb0; C. of 2.5 to 4.9 mm/s.

Lubricating oil composition for transmission

An evaluation system includes a speech data acquisition unit configured to acquire speech data from speech of a member engaged in a task, a speech recognition unit configured to recognize content of the speech from the speech data and convert the content into text data, a task data acquisition unit configured to acquire data indicating an action related to the task of the member and data indicating a task status, an extraction unit configured to extract conversation data related to the task from the text data based on the content of the speech recognized by the speech recognition unit, and an analysis unit configured to analyze correlations between the conversation data, the data indicating the action, and the data indicating the task status.

Evaluation system, evaluation method, and program

A lubricating oil composition for transmissions is provided which improves fuel saving properties and has excellent metal fatigue life and heat resistance. The composition contains 50 to 97 percent by mass of (A) a mineral base oil having a 100&#xb0; C. kinematic viscosity of 1.5 mm/s or higher and 3.5 mm/s or lower, a pour point a &#x2212;25&#xb0; C. or lower, a viscosity index of 105 or greater, a % Cof 85 or greater, a % Cof 2 or greater and 20 or less and a % Cof 3 or less; 3 to 10 percent by mass of (B) a monoester-based base oil having a 100&#xb0; C. kinematic viscosity of 2 mm/s or higher and 10 mm/s or lower; and 150 to 400 ppm by mass as phosphorus of (C) a specific sulfur-containing phosphite ester. The composition has a 100&#xb0; C. kinematic viscosity of 2.5 mm/s or higher and 4.0 mm/s or lower.

Lubricating oil composition for transmissions

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Tokyo, Japan

Kohei Masuda