The inertial force and torque produced by the crank-rod mechanism is an important factor of vibration in single-cylinder internal combustion engine. Based on MATLAB software, the analysis model of crank-connecting rod-piston mechanism of S195 diesel engine is established, and the dynamic characteristic parameters of the main parts can be obtained. The results showed that the simulation analysis can get the kinematic and dynamic data of the mechanism conveniently and accurately, which provides a feasible advanced method for the design and development of diesel engine.

The Au/SiO2nanocomposite was produced using surface active agent P123, and its optical absorption spectra was measured by spectrophotometer. It was found that the intensity of absorption peak was strengthened and underwent a red-shift as the neutralization reaction time extended. The variation of optical extinction property of one gold particle (GP) with different size had been investigated by Mie theory. It was found that the extinction property of the single spherical GP possessed an obvious size effect. The extinction property of Au/SiO2nanocomposite had been analyzed by Maxwell-Garnett (MG) theory. It showed that the extinction peak underwent a red-shift and the extinction intensity was strengthened when the size of gold nanoparticles (GNs) increased. The theoretical and the experimental results show that the extinction property of Au/SiO2nanocomposite changes because the scattering effect of GNs are strengthened when their sizes increased by controlling the neutralization reaction time.