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Development of a simplified method for measuring engine motoring friction and its application to valve train friction measurement

Nakashima K., Kato T., Goto K., Murakami Y.

Journal of KONES

2016

Vol. 23, No. 2

261--267

We developed a simpler and less expensive method for measuring friction. Our equipment floats the double-end shaft motor by supporting both sides of the motor shaft with bearings, allowing the stator within the motor case to swing on the rotor with the shaft. Two arms were installed in the motor case; one is attached to a load meter; the other to a balance weight. The motor shaft is connected to the engine shaft, and when the engine is operated by the motor, torque is exerted on the stator with the motor case in the direction opposite to the motor shaft rotation, with engine friction acting as the reaction force. Torque is calculated by multiplying the arm length by the load as measured by the load meter in the arm. As an application of our new motoring friction test method, we measured valve train friction. The cylinder head of a single cylinder gasoline engine was clamped on a test bed, and its camshaft was connected to our friction measuring equipment. Utilizing various follower configurations of the rocker arms, we investigated the friction loss between the rocker arms and the cam. We thus clarified the effect of the valve-opening period and the valve lift on friction loss under various camshaft rotation speeds, and understood the lubricating conditions between the rocker arms and the cam.

R&D of novel medicinal materials for curing cancer: sugar modified Gd-DTPA MRI contrast agents and phospha sugar anti-cancer agents

Yamashita Y., Yamashita M., Fujie M., Suyama K. A. T., Ito S., Reddy V. K., Yamada M., Ogawa K., Ozaki N., Nakamura S., Aoki T., Yu G., Aoshima K., Kato T., Kamikage N., Kiyofuji K., Takehara Y., Sakahara H., Takayanagi H., Oshikawa T., Laurent S., Burtea C., Van der Elst L., Muller R. N.

Journal of Automation Mobile Robotics and Intelligent Systems

2009

Vol. 3, No. 4

80-83

Novel Sugar Dendritic Gd-DTPA Complexes for MRI Contrast Agents were prepared and evaluated by in vitro and in vivo methods. The sugar dendritic MRI contrast agents have a good blood vesse pool character, and draw blood vessels and liver cancer remarkably clearer than the clinically using Gd-DTPA. Phospha sugar derivatives or phosphorus heterocyclic derivatives provided by functional groups such as epoxide, bromide, etc., were prepared and evaluated by MTT in vitro method. These phospha sugar derivatives showed excellent activities against leukemia cells as well as solid cancer cells in fashions of (i) higher activity, (ii) wider spectra, (iii) higher selectivity and specificity distingushing healthy and cancer cells, etc., compared with the molecular targeting chemotheraputic anti-cancer agent, Gleevec.

Preparation of carbonaceous heavy metal adsorbent from palm shell using sulfur impregnation

Sugawara K., Wajima T., Kato T., Sugawara T.

Ars Separatoria Acta

2007

No. 5

88-98

We attempt to prepare a heavy metal adsorbent from palm shell with a simple-two step process using pyrolysis and sulfur impregnation. Palm shell was pyrolyzed with three different methods; rapid pyrolysis, slow pyrolysis, and KOH pyrolysis, and the prepared char with high specific surface area was sulfurized with H2S impregnation to obtain the sulfur-impregnated char with the adsorption ability of heavy metals. The pyrolysis char with high specific surface area can be obtained by KOH pyrolysis, which was pre-treated with KOH solution before slow pyrolysis, and can added sulfur into KOH pyrolysis char using H2S gas. The sulfur content of sulfur-impregnated char increased with increasing the time of H2S treatment, and increased the adsorption amount of Pb2+ from aqueous solution. The sulfur impregnated char was more effective for Pb2+ and Zn2+ adsorption than commercial charcoal.