发动机悬置系统设计（The design of engine mounting system）.docVIP

发动机悬置系统设计（The design of engine mounting system） Design of engine mounting system Mounting system The engine itself is an internal source of vibration and is also subject to various vibration disturbances from the outside. Cause parts damage and uncomfortable ride. Therefore, the suspension system is installed to minimize the vibration of the engine to the support system. The success of vibration control depends mainly on the structural type, geometric position and structure, stiffness and damping characteristics of the suspension. Determining a reasonable suspension system is a rather complex task. It meets a series of static and dynamic performance requirements, and is constrained by various conditions, which greatly increases the difficulty of the design. Generally speaking, the following requirements for engine mounting system are required. To be able to bear the dynamic and static loads under all conditions, and to make the displacement of the generator assembly in all directions within an acceptable range, without interference with other parts on the chassis. At the same time, the engine parts will not be damaged before the overhaul. It can isolate the vibration from the engine to the frame and the cab, and reduce the vibration and noise. The vibration of the engine passing through the suspension and the vibration noise can be completely isolated due to the unevenness of the road surface. Ensure that the bending moment of the connecting surface between the engine block and the flywheel housing does not exceed the allowable value of the engine manufacturer. Vibration source of suspension system The excitation source acting on the engine mounting system is as follows: Engine start and stall swing; Jitter during idle running; Vibration of engine at high speed; Body vibration caused by road surface impact; Shaking at high torque; The car started or when the transmission torque changes caused by the impact; The large misalignment caused by interference and damage. T