In modern engineering, electromagnetic induction quenching is usually adopted in improving the fatigue performance of steel engine parts such as crankshafts. order to provide theoretical basis for design process, correct evaluation strengthening effect this technique necessary. paper, research aim on a given type crankshaft. First magnetic-thermal coupling process was simulated by 3D finite ele...

This article deals with the geometrical deviation measurements of crankshafts large marine engines fuelled conventional or alternative fuels, taking into account problem their deformability. Since detectability deviations a crankshaft supported by prisms depends largely on support conditions assumed and parameters method, study was carried out for two cases support. The first case concerned mai...

In the automotive field, requirements in terms of carbon emissions and improved efficiency are shifting focus designers towards reduced engine size. As a result, dynamic balancing an with strict limitations on number cylinders, weight available space becomes challenging task. The present contribution aims at providing designer tool capable selecting fundamental parameters needed to correctly ba...

Free-piston diesel engines are characterized by freely moving pistons without any crankshaft or camshaft connected to the pistons. This allows a compact and efficient engine design, but requires automatic control of the piston motion. This paper present a dynamic mathematical model of a free-piston diesel engine, and a control oriented dynamic analysis leading to a piston motion control structu...

VarioCam technology allows adjustment of the camshaft angle and is set to provide optimum performance for each Porsche engine. For example, in the Boxster, the camshaft angle can be adjusted by as much as 40 degrees compared to the crankshaft, reducing charge cycle losses, improving power, fuel consumption and keeping exhaust emissions to a minimum. In the Cayenne, an adjustment of up to 25 deg...

The precision rotary vector reducer with involute variable tooth thickness (PRVT) is a high-performance transmission device, which very suitable for aerospace, medical machinery, industrial robots, automation equipment, and other fields, its torsional stiffness an important performance index. This paper establishes dynamics model of the whole machine based on Lagrangian method by considering ge...

In spite of the fact that flexibility crankshaft diesel engines exhibits notable nonlinearities, analytical modeling such nonlinearities is not yet realized. The present study thus analytically models effect eccentricity on flexible and piston secondary motion. modeled as summation hydrodynamic dynamic mass crankshaft. also absolute value vibrational displacement center paper proves sensitive t...

Abstract As a core component of the Marine engine, crankshaft crank is required to have high surface quality ensure that ship does not fail during voyage. After analysing defect characteristics, aiming at problems such as inaccurate detection single feature in bend defect, which leads poor effect, classification method based on machine vision was proposed. The recognition accuracy can reach 97....