... is the calculation of the so-called system cumulative probability of failure. For that, we use an equivalent time-invariant “composite” limit state and a niching genetic algorithm with lazy learning metamodeling. A two-mass vibratory system example and an automotive roller clutch example demonstrate the calculation...

...Shaker S. Hassan A new methodology for enumeration of feasible clutching sequences of epicyclic gear mechanism (EGM) composed of two or more fundamental gear entities is presented. The method relies on previous work on algorithmic technique. It improves on existing techniques used for automatic...

...Giovanni Berselli A fully mechanical, infinitely variable transmission (IVT) based on the use of an oscillating inertia is described. The system includes a four-bar linkage mechanism, an epicyclic gear train, and a pair of one-way clutches. The IVT can be used in place of both gearbox and clutch...

... an oscillatory motion in an equal number of planet gears. A number of indexing clutches are then used to rectify this motion into a rotational output. A full description of the mechanism, including its components, operation, and kinematic equations, are presented. There are a number of inversions of this device...

...Yonggang Liu; Datong Qin; Hong Jiang; Yi Zhang This paper focuses on the dynamic modeling and analysis of dry dual clutch transmissions (DCTs) during vehicle launch and shifts. The system model incorporates the clutch torque control strategies for DCT vehicle launch and shifts. This model...

...-of-freedom Ravigneaux gear mechanism are derived, which are functions of basic gear ratios. Next, the ranges of the derived speed ratio equations are estimated and classified into three groups to synthesize all possible clutching sequences. Then, a planar-graph representation is proposed to arrange...

... transmission system is described (MG-IVT). MG-IVT is made up of the coupling of a continuously variable transmission, a planetary gear train, and two ordinary transmissions with a constant transmission ratio. By means of two frontal clutches, the MG-IVT is allowed to get two different configurations. The main...

...Wenming Shen; Weileun Fang This paper presents a simplified friction clutch design, which consists of the dual Belleville spring and the friction plates. This design exploits the preset angle on the Belleville spring to increase the friction area during operation; thus, the load on spring...

...Y. Zhang, Associate Professor; X. Chen, Graduate Student; X. Zhang; H. Jiang; W. Tobler This paper presents a systematic model for the simulation and analysis of a power-shift transmission that features a dual-clutch design. The paper models the kinematics, dynamics, and control of the transmission...

...F. G. Benitez; J. M. Madrigal; J. M. del Castillo An infinitely variable transmission (IVT), based on the use of one-way action clutches, belonging to the family of ratcheting drives is described. The mechanical foundations and numerical simulations carried out along this research envisage...

... design. Future work on the transmission layout problem includes using the actual clutch geometry with exact piston and spring designs instead of the simplified models. Comparing the Newly Generated Layouts with the Actual Design # of Discs K1 K2 K3 B1 B2 BR OBJECTIVE...

...Nathan B. Crane; Larry L. Howell; Brent L. Weight; Spencer P. Magleby This paper introduces the floating-opposing-arm (FOA) centrifugal clutch, presents a mathematical model for its analysis, and demonstrates the validity of a model to predict clutch performance with experimental data. The novelty...

...Ming Feng; Kyosuke Ono; Kenji Mimura This paper describes an investigation of the dry contact problem in the variable torque slipping clutch with skewed rollers. The FEM based discretization of the integral equation of the Boussinesq solution is utilized in order to consider the spatial finite...

...Gregory M. Roach; Larry L. Howell Compliance criteria are used to evaluate the general class of over-running clutches to determine which type is best suited to benefit from compliance. The criteria used in the evaluation include the presence and angle of rotation of revolute joints, the possibility...

...Ming Feng; Kyosuke Ono; Kenji Mimura In this paper, a new type of a clutch by the name of the variable torque clutch with skewed rollers is first introduced and second investigated both theoretically and experimentally. It is comprised of an inner and an outer race that are each in spatial line...