Keywords: engine, microrelief, diagnostic methods, mathematical model.

Mathematical model in question (based on probability theory) may be used in technical diagnostic of internal combustion engines, determination of engine «quality area», and comparison of various diagnostic methods, taking account of costs involved.

Keywords: diesel engines, engine power equation.

New form of reciprocating engine power equation if offered, more suitable for evaluation of engine energy performance and design quality. Trends are considered in the development of high-powered vehicle engines of various applications, with high values of mean effective pressure and mean piston speed. Presented are energy data of modern four-stroke vehicle engines.

Keywords: cogeneration power plants.

The article presents the results of a research cycle dedicated to creation of a range of cogeneration power plants rated at 60 to 1000 kW electric power and 80 to 1200 kW heat energy, new heat recuperation solutions are analysed, and recommendations are offered on their implementation in particular engine types.

Keywords: engine prestart heating, phase transition heat accumulators.

The article discusses possible methods and means of vehicle engine prestart heating, which assure engine start at negative ambient temperature with no support from external energy sources. Prestart heating systems featuring phase transition heat accumulators (PTHA) are considered in detail. PTHA are shown as contributing into better engine operation performance.

Keywords: low-speed marine engine, fuel injection equipment.

The research work in question included testing of fuel injection equipment of type 6S50MC-C low-speed marine engine manufactured by BMZ under MAN Diesel A/S license, using various loading schedules. A method has been developed to derive a «reference pressure pulse» downstream of high pressure feed pump, to be used in fuel equipment diagnostic algorithms.

Keywords: marine diesel engines, emissions, generalized statistics.

The article presents generalized statistics on pollutant emission from propulsive and auxiliary marine diesel engines. The data collected are directly measured during factory tests and field tests onboard various vessels. The statistical sample encompasses over 120 types of marine diesel engines, both Russian make and imported for the last twenty years.

Keywords: diesel soot aggregates.

The subject of the research was structure of diesel soot before exhaust valve opening. Mechanism of diesel soot aggregation after exhaust valve opening was explored. The research included measurement of various diesel soot aggregates contributing into deterioration of valve contact surface. Equations are offered to calculate energies of diesel soot aggregates in exhaust as stream.

Keywords: marine propulsion engine loading.

The article focuses on changes in operating parameters of stationary and transport engines during transients caused by load application and engine acceleration under load. Recommendations are offered on limitation of load suddenly applied to diesel-generator sets equipped with different supercharge systems, and optimum schedules of marine propulsion engine loading.

Keywords: Stirling engine.

Externally heated engines based on regenerative closed-loop cycle take undeservedly little place in engine building history. Stirling engine invented at the beginning of XIX century provides a number of benefits such as multi-fuel capacity, high fuel efficiency, environmental safety, and low noise. Nowadays scope of Stirling engine applications is pretty wide. Such engines are growingly used as autonomous environment-friendly power sources.

Keywords: hybrid technologies.

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