| Automotive Powertrain vehicle vibration is the major source of vibration and noise, in order to improve the ride, it is necessary to improve the powertrain vibration isolation mounting system performance. Based on a domestic hybrid cars as a platform to study its powertrain vibration isolation mounting system performance. Hybrid Electric Vehicle Powertrain including engines, ISG motor, clutch and transmission, with the traditional multi-vehicle powertrain compared to a motor, low efficiency in the region, the engine stopped working, and only by a motor vehicle driver. Engine at low speed, high torque range, and improved fuel economy. At the same time, this also means that the engine is constantly start / stop the very uncomfortable vibration; In addition, climbing, acceleration, overtaking Under such circumstances, the need for power or torque when the engine and motor drive , at this time, powertrain suffered from the vibration of the engine and electric components. Secondly, automobile brake even when the emergency brake, the clutch will automatically separated from the engine stopped working, as the sudden braking torque imposed powertrain direction of the axis by a transient incentives, the cars have a huge impact. Powertrain the unbalanced force and torque through the Powertrain Mounting transmitted to the car body or frame, which caused the vehicle vibration, lower the car ride.Powertrain Mounting System for the isolation of a car ride very important impact on the good performance powertrain mounting system can not only reduce vibration transmission to the chassis, reducing vehicle noise, improving comfort , but also better protect the powertrain. How to design high-performance vibration isolation mounting system to effectively isolate engine vibration to the body of the transmission, automotive design is an important aspect.My text's work mostly include next several aspect:1. By reading this paper and find a lot of literature, the development of components from Mount Mounting System and Design Optimization of the development of two and systematically explain and summed up the mounting system of the situation at home and abroad and research results.2. Systematically summarizes the powertrain mounting system designed some design criteria and design requirements of the hydraulic model and rubber mount overhang model, described the powertrain vibration isolation mounting system theory and motivation Mounting System assembly of the inherent characteristics were analyzed. Meanwhile, the hybrid car of the three conditions typical of the exciting force is analyzed.3. Based on the theoretical analysis Mounting System and joint powertrain mounting system parameters, establish the three-dimensional dynamic model of ADAMS and SIMULINK simulation model, laid the foundation for the simulation model behind.4. Automatic clutch engagement process, ISG joint drive motor and the engine, clutch automatic separation of the three working conditions of the region, the mechanical and kinematics analysis by the model in six of the direction of the vibration and size. By the frequency domain analysis model, has six powertrain rigid modal natural frequency bands, from the perspective of energy in all directions to explain the vibration coupling. Finally, MATLAB simulation results show that the model is correct.5. To the left and right, after three overhang on the direction of the three components to optimize variable stiffness, powertrain mounting system energy decoupling as the objective function, in ADAMS / Vibration modules, has been optimized. Optimization can be seen from the results, 6-DOF vibration coupling be greatly improved and have reached the expected results.
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