Climate change is exacerbated by vehicle emissions. Furthermore, pollution contributes to respiratory and cardiopulmonary diseases, as well lung cancer. This requires a drastic reduction in global greenhouse gas emissions for the automobile industry. To address this issue, researchers are required reduce friction, which one of most important aspects improving efficiency internal combustion engi...

The oil film behavior of a series of fifteen lubricating oils was tested in a single cylinder spark ignition engine. The oil film thickness between the piston and cylinder liner of this engine was observed using the Laser Induced Fluorescence (LIF) technique. The data was examined for correlations between physical properties of the oil and characteristics of the oil film. The region of the oil ...

Leakage rates are evaluated for a landfill barrier system having a compacted clay liner (CCL) underlain by a vadose zone of variable thickness. A numerical unsaturated flow model SEEP/W is used to simulate the moisture flow regime and steady-state leakage rates for the cases of unsaturated zones with different soil types and thicknesses. The results of the simulations demonstrate that harmonic ...

ABSTRACT: To develop an unmanned automatic excavator system the control performance of hydraulic actuators should be guaranteed. However, hydraulic actuators with single rod cylinder have inherently severe nonlinearities that significantly affect to the command following performance of end-effect. PID control system widely used in industries is not proper to compensate the nonlinearities and it...

I C engines are the largest energy converting units for the mobile application across the globe and millions of litres of oil is converted into mechanical energy using these engines every day. It has been recognized that a large amount of energy is lost in the friction between Piston ring – Cylinder assembly. Hence this area has been the interest of research for decades. Oil film thickness form...

Hydraulic buffer systems play a significant role in energy absorption and improving belt arrest reliability in downward belt conveyors. In order give hydraulic buffer systems more preferable buffer properties, a parameters optimization method based on a reference model is proposed. Firstly, the working principle of a hydraulic buffer system for a belt arrestor is provided. Secondly, the mathema...

In order to effectively monitor the wear and predict life of cylinder liner, a nonlinear degradation model with multi-source uncertainty based on Wiener process is established evaluate remaining useful (RUL) liner wear. Due complex service performance operational environment working conditions are considered into by random function. The probability density function (PDF) formula RUL derived, ma...

The article discusses the method and results of processing statistical data from an experimental study vibrations in marine diesel engines caused by operation cylinder-piston groups. application a ranking for identifying factors that influence vibration are presented to determine most significant ones. A series experiments were conducted according special plans actively implement random balance...