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Temperature has a direct impact on the capacity fading of a power Li-ion battery during the battery's lifecycle; however, the inner temperature of the battery cannot be measured directly because of the sealed structure. To address this problem, we estimate the inner temperature of a Li-ion battery by measuring the surface and ambient temperature using an equivalent thermal model to build the ETM-Arrhenius...
As the most important assembly affecting passengers' safe, automobile seat must meet the requirements of the national standard GB 15083-2006 and even stricter company standards. Seat recliner, which is the major subassembly contributes to the strength of seat, should have strong strength to balance the torque transferred from the backrest. In this paper, a finite element analysis of seat recliner...
Multi-link independent suspension is built according to the hard point parameters of a car. Using multi-body dynamics and suspension kinematics theory, the suspension performance were analyzed under the simulation test of parallel wheel travel, loading brake force after the outer rubber bushing stiffness of the under control arm is changed. The conclusion is drawn that axial stiffness of rubber bushing...
Fatigue tests has been completed. A lot of bushing failed. In order to improve the effective lifetime of rubber bushing used in chassis, research the failure mechanism of rubber bushing, a finite element model of rubber bushing was build, and then simulated with FEM. The results showed that on the rubber bushing stress nephogram, the position of the maximum stress is just the place where the rubber...
Based on the finite element method (FEM), this paper presented a technique for analyzing the vibro-acoustic coupling characteristics of bus passenger compartments. In view of sound quality of vehicle interior noises in the low frequency range, the acoustical, structural and coupled acoustic-structural FEM models of the passenger compartment of a sample bus are respectively established for modal, harmonic...
Failure happens when test carried on one kind of coach seat recliner, such as: gears of locking board were broken, plastic deformation takes place on end of fixing base. A finite element model was set up and numerical simulation was carried on under boundary conditions which are the same with experiment. Results show that the maximum stress occurred at the dedendum of the first gear of locking board,...
The electronic fuel injector (EFI) is indispensable for real-timely controlling on the mixture ratio of a gasoline engine. With the speed of the engine is higher, there are stronger and stronger requirements for high dynamic performance of the EFI to satisfy with the limitation on fuel consuming and exhaust emission. In this study the dynamic working processing of an electronic port fuel injector...
Front double wishbone independent suspension is built according to hard point parameters of a car. After the rubber bushing stiffness of lower control arm is changed, the suspension performance is analyzed and discussed with multi-body dynamics and Suspension Kinematics theory. The conclusion can be drawn as follows: when wheels are hoping, all the stiffness of lower control arm have no effect on...
According to the High-temperature creep experience data, using different Unreliability Calculations and least-squares linear regression to get the parameters of Weibull distribution. And then the experience data which fit to the Weibull Distribution, Normal Distribution and Lognornal Distribution should be compared with each other by the same method. At last, the advice of the methods is proposed...
Front double wishbone independent suspension is built according to hard point parameters of a car. After the rubber bushing stiffness of under arm is changed, the suspension performance is analyzed and discussed with multi-body dynamics and Suspension Kinematics theory. The conclusion is drawn that axial and torsion stiffness of rubber bushing has a little effect on the suspension performance, but...
Spinning process of automotive drive housing part with spline, first, wafer material is chosen as billet. The billet is shaped by rolling depression using three rollers, and the roller is simulated by rigid model. The part material is extruded by three rollers to expand. Then it is shaped. By using simulation models in ABAQUS/Explicit, the spline shaping process of the part is simulated. After simulation,...
Study on the electronics, Firstly, based on the definition and algorithm of universal grey number, finite element equilibrium equations in the universal grey number are presented. Secondly, considering the uncertain coefficients of heat transfer and thermal conduct, the thermal field analysis in the two engineering structures are operated. Finally, comparing with the results of the universal grey...
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