Abstract This work investigates the causes of wear occurring at engine valve tip end after 400 hours operation. Fatigue was observed on product development stage engine, which is going to be used in an automotive vehicle. Valves were assembled a gasoline/CNG fuel-based four-cylinder IC engine. In this prominent during high-speed testing conditions as compared other types tests. The chemical com...

One of the most significant concepts deep restructuring economic mechanism Republic Uzbekistan is creation an integral, effective and flexible system management implementation on this basis a program to improve technical level quality machines. The car park our country more replenished with vehicles diesel engines. development contemporary engine building proceeding by forcing engines: increasi...

Generation of force and movement by actomyosin cross-bridges is the molecular basis of muscle contraction, but generally accepted ideas about cross-bridge properties have recently been questioned. Of the utmost significance, evidence for nonlinear cross-bridge elasticity has been presented. We here investigate how this and other newly discovered or postulated phenomena would modify cross-bridge...

Abstract Background Impella is a trans-aortic valvular pump commonly utilized in patients with cardiogenic shock. However, its use transcatheter aortic valves (TAVI) remains rare. We present two cases where surgical 5.5 was placed across both Sapien 3 Ultra and Evolute Pro+ valves. Case Summary Patient 1: 74-year-old male history of ischemic cardiomyopathy ejection fraction 20-25% status post c...

Three expressions are provided for the first hitting time density of an Ornstein-Uhlenbeck process to reach a fixed level. The first hinges on an eigenvalue expansion involving zeros of the parabolic cylinder functions. The second is an integral representation involving some special functions whereas the third is given in terms of a functional of a 3-dimensional Bessel bridge. The expressions a...

ports are the most important economic, political and military bottlenecks. this puts shoreline structures (port) in the class of important structures and they have a crucial role in the countries’ life. pile and deck wharf and their access bridges and offshore deck (jetties), are one of the parts which are supplier of coupling between the land and the waterfront. correct and exact estimation of...

Reactivity Controlled Compression Ignition (RCCI) is one of the most promising solutions among low temperature combustion concepts, in terms thermal efficiency and pollutant emissions. However, for values brake mean effective pressure higher than 10 bar, in-cylinder peak rise rates tend to be too high, limiting specific power any 4-Stroke (4S) engine. Such a limitation can canceled by moving 2-...

Increasing oil prices and emission legislation have forced automotive company to investigate new methods technologies reduce the harmful effect produced from motor vehicle, particularly CO2 (Carbon-Dioxide).A lot of studies research been put into in order achieve a zero vehicle with usage electricity rather than fossil fuel, but challenge cost environmental makes an IC engine is still being pre...

The project RoboMAP is a cooperation of different partners from science and industry, including our institute. It aims at the development of an inspection system for quality assurance in the automotive industry. The objects to inspect are cylinder heads. In particular the valve seats and the valve stem guides are of special interest. The latter lie in the inner part of the cylinder head and are...

The goal of the present work is to study theoretically the structure of water inside the water cylinder of the inverse hexagonal mesophase (H(II)) of glyceryl monooleate (monoolein, GMO), using the method of molecular dynamics. To simplify the computational model, a fixed structure of the GMO tube is maintained. The non-standard cylindrical geometry of the system required the development and ap...