Research On Several Key Technology Of Cab Suspensionfor Heavy-Duty Trucks

China as a representative of the Third World countries, the economy has been rapid developed since the end of the 20 th century. This brings great opportunities to every industries field. The production and sales of commercial vehicles also expand at an high rate. Meanwhile, the requirements for performance of commercial vehicle, not only long life circle and low maintenance costs, but also high-level riding comfort. And the purchasers aware that due to the complexity of commercial vehicle driving conditions: long-time and long-distance transportation, the driver is easy to be fatigued, which can result in adverse impact on the driver’s health and may even traffic accidents, brought the family and social irreparable loss. Therefore, improving commercial vehicle riding comfort is becoming a hotspot in the research of the global automotive industry. Former researches on the commercial performance of vibration isolation mostly concentrated in the suspension system and powertrains mount system, but there are few studies on the cab suspension system. As the cab suspension system can simultaneously isolated powertrain and road excitation, optimizing and matching design for the cab suspension system can effectively reduce the vibration in the cab.In this paper the method of the inertia parameters testing based on vibration test are introduced firstly, then we test the inertia parameters of white body and vertify the correctness of the method, Finally we obtain the inertia parameters though testing the interior cab, required in the following dynamic matching analysis.Second, we build a heavy truck cab suspension dynamic analysis model in the ADAMS, using the measured vehicle vibration excitation on frame end, by comparing the measured response and response calculated from dynamic model, we verify the correctness of the model. Combining the reality of the working conditions, we make dynamic analysis of the system, setting cabin seat slideway acceleration as the optimization goal, and optimize the stiffness and damping of front and rear suspension.Then the function and structure of stabilizer bar, key parts in the cab suspension system, are introduced in the paper. Based on the requirement of cab suspension system rolling, we design the stabilizer bar assembly, and derive the relational expression of cab rolling angle between stiffness of suspension system and stabilizer bar. On this basis, we test rigidity and fatigue performance of stabilizer bar in the laboratory, contrast analysis the design requirements and test results.To test the practical performance of the cab suspension, we do practical running operations on the specific test field, by analyzing the performance of vibration isolation and driver vibration comfort, we determine the performance of product in practical use. Experimental analysis show that the cab suspension meets the working requirement.We summarize the matching research and design method, which can provide reference for those colleagues who engage in the cab suspension design research.