HILSS (Hardware in the loop Simulation System) is a safe off-line virtual test system that will meet off-line test requirements, reduce development costs and shorten the test cycle. Traditional development methods of the control system will be changed by HILSS, which has been considered as an advanced simulation technology and a convenient method. The construction and development of HILSS of CV...

Use of automatic transmission systems in motor vehicles in addition to improving the ride comfort is also expected to reduce fuel consumption. The principle of the system Continuously Variable Transmission (CVT) is producing a variation of the ratio of the displacement system (i) as a function of velocity. The main problem is to change the variator CVT push-belt continuously variable from PULLE...

This paper presents a dynamic optimization approach based on the differential evolution (DE) strategy which is applied to the concurrent optimal design of a continuously variable transmission (CVT). The structure-control integration approach is used to state the concurrent optimal design as a dynamic optimization problem which is solved using the Constraint Handling Differential Evolution (CHDE...

This paper reviews the effects of lubricant additives and base stock used in metal belt continuously variable transmissions (CVT) fluids on the CVT transmission torque capacity. Additive formulation composed of phosphorus anti-wear agent, calcium detergent, and dispersant improved the friction coefficient between the metals. The analysis on the post-test surface suggests that the friction behav...

Since the inception of Computational Fluid Dynamics, turbulence model-ing and numerical methods evolved as two separate fields of research with the perception that once a turbulence model is developed, any suitable computational approach can be used for the numerical simulations of the model. Over the last decade, our group has pursued research with cardinally different philosophy in its belief...

One of the most important challenges facing automotive engineers is reducing vehicle fuel consumption and improving drivability index. Modern hybrid electric powertrains play an role in consumption. Continuously variable transmission (CVT) automatic that can change gear ratio seamlessly using a belt pulleys. CVT performs with infinite ratios. Controlling determining optimal ratio, especially co...

Many current local search algorithms for SAT fall into one of two classes. Random walk algorithms such as Walksat/SKC, Novelty+ and HWSAT are very successful but can be trapped for long periods in deep local minima. Clause weighting algorithms such as DLM, GLS, ESG and SAPS are good at escaping local minima but require expensive smoothing phases in which all weights are updated. We show that Wa...