Keywords: marine shafting, axial vibration, discrete model, axial yield, analytical methods.

The authors discuss principal steps of analysis of marine shafting axial vibration with up-to-date numerical techniques. The Runge-Kutta method is used for definition of free, forced & resonance vibrations, and integration of second-order differential equations. Finite element method is used for flexibility calculation as applied to crankshaft components and a thrust bearing. It is noted that calculation, as far as shafting axial vibrations are concerned, remains to be the only way of their prediction.

Keywords: multi-purpose diesel engine, electronic control system, calibration of a control unit, fuel injection system, stand tests, field tests.

The article describes electronic control system for type ZMZ-51432.10CRS engine, developed as a means to increase engine output and reduce fuel consumption. Intended scope of application of the system includes general purpose and military engines. Control system wiring was tailor-made and the system was adapted and calibrated for the engine, which enabled to increase torque by 23 % and reduce fuel consumption by 4 g/kW·h. The engine equipped with prototype system passed laboratory tests and then field tests as a part of a military boat featuring water-jet propeller.

Keywords: reciprocating engines, local heat exchange problems, promising solution methods, 3D-CRFD code applications, combustion theory.

The article presents brief history of Reciprocating Engine Department of Bauman Technical University and its contribution in development of «local heat exchange in reciprocating engines» as a subject area. Considered is specificity of problem solution concerning local heat exchange in reciprocating engines, using methods based on either classic Prandtl theory or modern 3D-CRFD-codes. Prognosis is presented of future development of subject area in question.

Keywords: petrol engine, exhaust gas, toxic components, catalyst, stand tests, operational factors, oxygen sensor.

A car petrol engine was given stand tests in order to evaluate influence of operational factors on performance of a three-way catalyst designed to reduce emissions of hydrocarbons and carbon oxide. The test results allowed to identify operation modes and factors affecting catalyst efficiency with respect to the above toxic components. Recommendations are offered on improvement of the catalyst performance so as to comply with respective applicable emission standards.

Keywords: dual-fuel engine, combustion, starting sequence, toggling between fuels, failure cause analysis.

Discussed are some design features of «MAN Diesel & Turbo» marine dual-fuel engine series 51/60DF, powering ships series S1910 through the electric transmission. Operating experience and failures over the period 18 000+ hours were analyzed. The analysis was primarily focused on engine starting sequence, switching between different fuel types (liquid fuel–gaseous fuel–liquid fuel) and respective failures. According to the analysis, most typical type of failure is unstable operation under operating conditions that are predominant in practice.

Keywords: fuel cell, electrochemical generator, solid polymer membrane, solid oxide electrolyte, hydrocarbonic fuel conversion, diffusive hydrogen separator, combined power plant.

The article discusses main types of fuel cells and power plants based thereon. The authors consider advantages of fuel cells power plants and their possible applications in energy production and vehicles. Krylov R and D Center develops fuel cells with solid polymer and solid oxide electrolyte, and power plant featuring such fuel cells, including cogeneration plants with diesel engines and heat recuperation systems. Some results of this project are discussed.

Keywords: heating system, payback period, capital costs, express-evaluation methodology, production functions.

Discussed are the results of comparative efficiency evaluation of capital investments involved in renovation of heating systems featuring boilers with high-temperature fluidized bed. Evaluation method makes use of universal diagram of material resource replacement, based on calculated two-factor Cobb-Douglas production functions.

Keywords: dual-fuel engines, common rail fuel systems, increase in injection pressure, pilot fuel systems, widening of energetic diesel fraction range, increase in fuel efficiency, reduction in toxic emissions.

Common rail (CR) principle is commonly recognized as one of the most promising technologies to be used in dual-fuel engines. Architecture of last generation CR systems and design features of new wide range injectors from «L'Orange» (Germany) and OMT (Italy) secures full flexibility with energetic diesel fractions of 1 % to 100 %, which makes it possible to get rid of pilot fuel system altogether. Increase in rail pressure up to 2200 bar enables to significantly enhance fuel efficiency both in diesel and gas modes, reduce toxic emissions and mass & sizes of fuel system components. The CIMAC papers are translated into Russian by G.Melnik, PhD.