Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Kobe Steel, Ltd.

Infineum International Limited

Keiji Hayashi

Hiroyuki Mori

Mamoru Tohyama

Naoya Ikeda

Masaru Okuyama

Yoshio Fuwa

Hitoshi Yamada

Yuhei Yamaguchi

Takatoshi Shinyoshi

Chie Imamura

Munehisa Matsui

Raymond F Watts

Rentaro Kuroki

Takuya Hirai

Philip Skinner

Hirokazu Saito

Kyosuke Arai

Koichiro Akari

Kenji Shimoda

Hirotaka Ito

Satoshi Hirota

Toshihide Ohmori

Kazuhiro Miyajima

Yuichi Shimasaki

Koji Saito

Joe R Noles, Jr

Minoru Yamashita

Kiyomi Sakakibara

Atsushi Suzuki

Syou Tomita

Satoshi Jinno

A mental and physical condition estimation system according to the present disclosure includes: a heart rate information acquisition unit for acquiring heart rate information that is information related to a heart rate of a subject person; a heart rate variability calculation unit for calculating heart rate variability of a very low frequency component (VLF) from the acquired heart rate information; and a mental and physical condition estimation unit for estimating a concentration and effort state of the subject person from a calculated value of the heart rate variability.

Mental and physical condition estimation system, mental and physical condition estimation method, and storage medium

A physiological state index calculation system, a physiological state index calculation method, and a non-transitory computer readable medium for capturing subtle changes in a physiological state of a living body are provided. The physiological state index calculation system includes a band-pass filter that filters cerebral blood flow waveform information obtained from a cerebral blood flow of a living body in at least one frequency band, and a complex number conversion unit configured to convert the filtered cerebral blood flow waveform information into a complex number for at least one frequency band. The cerebral blood flow waveform information converted into a complex number by the complex number conversion unit is an oscillator that reflects a physiological state of a living body.

Physiological state index calculation system, physiological state index calculation method, and non-transitory computer readable medium

[Technical Problem] An object is to provide a sliding system which can achieve both the reduced friction and the enhanced wear resistance by means of a novel combination of a sliding film and a lubricant oil. [Solution to Problem] The sliding system of the present invention comprises: a pair of sliding members having sliding surfaces that can relatively move while facing each other; and a lubricant oil interposed between the sliding surfaces facing each other. At least one of the sliding surfaces comprises a coating surface of a crystalline chromium carbide film. The lubricant oil contains an oil-soluble molybdenum compound that has a chemical structure of a trinuclear of Mo. When the chromium carbide film as a whole is 100 at %, the chromium carbide film contains 40-75 at % of Cr. The chromium carbide film in contact with the lubricant oil containing a Mo-trinuclear appears to react with the Mo-trinuclear adsorbed during the sliding to generate a layered structural body (boundary film) similar to MoSon the surface, thereby developing a considerably low friction property.

Sliding system

A sliding machine includes: a pair of sliding members having sliding surfaces that oppose each other and are able to move relative to each other; and a lubricating oil which is able to be interposed between the opposed sliding surfaces, in which at least one of the sliding surfaces is covered with a chromium (Cr)-containing amorphous carbon film (chromium-coating DLC), and the lubricating oil contains an oil-soluble molybdenum compound having a chemical structure formed from a trinuclear material of molybdenum (Mo). Specifically, the chromium-coating DLC contains, when the entirety of the film is assumed to be 100 at. %, 1% to 49% of Cr, 0% to 30% of hydrogen (H), carbon (C) as a remainder, and impurities. The lubricating oil contains 5 ppm to 800 ppm of the oil-soluble molybdenum compound in terms of Mo mass ratio with respect to the entirety of the lubricating oil.

Sliding machine

[Technical Problem] An object is to provide a sliding system which can drastically reduce the friction coefficient on a sliding portion by means of a novel combination of a chromium nitride film and a lubricant oil. [Solution to Problem] The sliding system according to the present invention includes: a pair of sliding members having sliding surfaces that can relatively move while facing each other; and a lubricant oil that can be interposed between the sliding surfaces facing each other. At least one of the sliding surfaces is formed as a coating surface of a chromium nitride film, and the lubricant oil contains an oil-soluble molybdenum compound that has a chemical structure of a trinuclear of Mo. When the chromium nitride film as a whole is 100 at % (referred simply to as '%'), the chromium nitride film contains 40-65% of Cr and 35-55% of N, and the chromium nitride film has a relative surface area of 15-60% wherein the relative surface area is a surface area ratio of (111) plane to (200) plane obtained when analyzed using X-ray diffraction. The lubricant oil preferably contains 5-800 ppm of the oil-soluble molybdenum compound in a content mass of Mo to the lubricant oil as a whole.

A wet friction clutch&#x2014;lubricant system wherein a wet friction clutch having a cellulose&#x2014;based friction lining having a surface coating of silica based particles, or a device including such a clutch, is lubricated with a lubricant composition a major amount of oil of lubricating viscosity and minor effective amounts of performance enhancing additives including (a) ashless dispersant; (b) organic phosphorus compound and (c) borated detergents; and optionally, (d) an auxiliary friction modifier.

Wet friction clutch&#x2014;lubricant systems providing high dynamic coefficients of friction through the use of borated detergents

This invention provides a coolant composition for an internal combustion engine that can improve the energy efficiency of an internal combustion engine and a method for operating an internal combustion engine using such coolant composition. The coolant composition for an internal combustion engine of the invention has kinematic viscosity of 8.5 to 3,000 mm/sec at 25&#xb0; C. and 0.3 to 1.3 mm/sec at 100&#xb0; C. The method for operating an internal combustion engine of the invention is carried out with the use of such composition.

Coolant composition for internal combustion engine and method for operating internal combustion engine

A sliding member includes: a substrate which has a sliding surface sliding under the presence of lubricating oil; and a film which is fixed to at least a part of the sliding surface. The film contains carbon (C), titanium (Ti), and boron (B), is obtained by repeatedly and alternately layering a first layer containing amorphous carbon as a principal component and a second layer containing C and Ti as principal components, and has hardness of 18 GPa or more.

Sliding member

The low friction sliding member includes a substrate and an amorphous hard carbon film formed on the surface of the substrate and makes sliding contact with a mating member under a wet oiling condition. The lubricant oil includes at least one of sulfur (S) and phosphorus (P) and at least one of zinc (Zn), calcium (Ca), magnesium (Mg), sodium (Na), barium (Ba) and copper (Cu). The amorphous hard carbon film comprises carbon (C) as a major component, and hydrogen (H) in the range from 5 to 25 atomic % and a predetermined amount of boron (B), aluminum (Al), manganese (Mn) or molybdenum (Mo) assuming that the total atomic % of the amorphous carbon film is 100.

Low friction sliding member

Growing community of inventors

Nagoya, Japan

Keiji Hayashi