| 摘要 |
PURPOSE:To obtain an engine mount, in which the spring constant can be changed over a wide range of oscillation frequency and a desirable spring constant can be obtained over a wide operation range. CONSTITUTION:An engine mount 4 to be arranged between a car body 39 and an engine 10 has a rubber elastic bodies 35, 38 to be deformed elastically by an input oscillation, and a main liquid chamber 64, which is filled with liquid and of which volume is changed in response to the deformation of the rubber elastic bodies 35, 38, and an auxiliary liquid chamber 65, which is filled with liquid and of which volume can be changed in response to a change of volume of the main liquid chamber 64. The main liquid chamber 64 and the auxiliary liquid chamber 65 can be communicated or cut with/from each other by a passage 46 and an orifice passage 460. The orifice passage 460 consists of a first through-hole 148 of a rotating plate 160 and a long hole 150 with a circular bottom of a fixed plate 158 and a second through-hole. Switching of opening/ closing of the orifice passage 460 and the adjustment of the effective passage length thereof at the time of open can be changed continuously in response to the relative rotating angle between the rotating plate 160 and the fixed plate 158. |
