DI Diesel Engines M57/M67 - Common Rail Sec. 4 P.1
Course contents/Background material
Engine mounts
Brief description
The engine mount principle used on the M57 and M67 engines
is
basically the same as from the M51TÜ. The damping
charac
teristics 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.
© BMW AG, Service Training
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