Title:
DAMPER
Document Type and Number:
WIPO Patent Application WO/2005/057046
Kind Code:
A1
Abstract:
A damper capable of satisfactorily absorbing any torsional vibration occurring on a crank shaft even in the use at extremely low temperatures. The crank shaft of engine has a hub capable of joint rotation therewith fixed thereto, and an inertial mass disposed outside the hub is coupled with the hub by means of a rubbery elastomer. The damper exhibits a ratio of characteristic frequency along the torsional direction at -30°C (F-30) to characteristic frequency along the torsional direction at 60°C (F60), F-30/F60, of 1.5 or below, while the rubbery elastomer exhibits a ratio of storage modulus at -30°C (E’-30) to storage modulus at 60°C (E’60), E’-30/E’60, of 3.0 or below. The rubbery elastomer comprises an ethylene-propylene copolymer rubber of 51% or less ethylene weight ratio as a main component and, mixed with 100 pts.wt. thereof, 5 to 30 pts.wt. of an aliphatic dibasic acid ester plasticizer.
Inventors:
SUNAOKA MOTOYUKI (JP)
YAMADA MASATSUGU (JP)
TAKAMATSU NOBUYOSHI (JP)
OGAWA MIKIHITO (JP)
TAGAWA SEIICHI (JP)
YAMADA MASATSUGU (JP)
TAKAMATSU NOBUYOSHI (JP)
OGAWA MIKIHITO (JP)
TAGAWA SEIICHI (JP)
Application Number:
PCT/JP2004/018567
Publication Date:
June 23, 2005
Filing Date:
December 13, 2004
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
FUKOKU KK (JP)
SUNAOKA MOTOYUKI (JP)
YAMADA MASATSUGU (JP)
TAKAMATSU NOBUYOSHI (JP)
OGAWA MIKIHITO (JP)
TAGAWA SEIICHI (JP)
FUKOKU KK (JP)
SUNAOKA MOTOYUKI (JP)
YAMADA MASATSUGU (JP)
TAKAMATSU NOBUYOSHI (JP)
OGAWA MIKIHITO (JP)
TAGAWA SEIICHI (JP)
International Classes:
C08L23/16; F16F15/126; (IPC1-7): F16F15/126; C08L23/16
Foreign References:
| JP2003082181A | 2003-03-19 | |||
| JPS6333043U | 1988-03-03 | |||
| JPH06287371A | 1994-10-11 | |||
| JPH09196113A | 1997-07-29 | |||
| JPH10195246A | 1998-07-28 |
Attorney, Agent or Firm:
Tsutsui, Yamato (3F Azeria Bldg., 1-1, Nishi-shinjuku 8-chom, Shinjuku-ku Tokyo 23, JP)
Download PDF: