Brief description
The engine mount principle used on the M57 and M67 engines is basically the same as from the M51TÜ. The damping characteristics of the hydraulic mount are set softer or harder by means of a vacuum. In this way, the vibration transmitted from the engine to the body can be influenced specifically.
Requirements and Objectives
The following requirements and objectives apply to the engine mounts:
• Requirements
– Various damping characteristics of the mounts
– Simple design
– Rapid response characteristics
• Objectives
– Comfort at idle speed
– Isolation of engine vibration
– Specific reduction in natural resonance of engine caused by uneven road surfaces and shut-down judder.
System structure
The system consists of:
• Two hydraulic mounts with controlled damping characteristics
• One electric changeover valve
• The control unit (DDE)
• Various electrical and pneumatic lines
