Engine hydraulic bearing

摘要

The invention relates to an engine hydraulic bearing with a bearing core serving for engine fixing, an annular spring element and an abutment which can be fixed to the vehicle body side. At the same time, a working chamber filled with hydraulic fluid is provided and a fluid-filled compensating chamber of variable volume separated from the former chamber by a dividing wall. In addition, a throttle orifice is provided, which connects the working chamber to the compensating chamber, whilst the dividing wall accommodates a displaceable diaphragm which, actuatable by means of adjusting elements, can be brought, at least temporarily, into extensive contact with a bearing surface of the dividing wall impeding the diaphragm's facility for free deflection, and especially in higher engine speed ranges constantly bears on the dividing wall, and at low engine speeds is supported so that it is free to oscillate. If the diaphragm is then brought to bear briefly on the dividing wall also during the engine starting and/or shut-off sequence, it is thereby possible to ensure in an especially cost-effective manner that optimum bearing characteristics exist in all engine operating conditions and in particular, that the disturbing impact of the diaphragm on its dividing wall bearing surface during starting and/or shutting off of the engine and the large vibration amplitudes associated therewith can be reliably avoided.