Keywords: diesel engines.

Bottom lines and prospects of engine building in Russia in XXI Century.

Keywords: diesel engines.

The article discusses the results of analyses and tests of unit-cast and multi- component piston skirts in medium-speed four-stroke internal combustion engines. Shortcomings of the existing piston skirt design are demonstrated. Proposed alterations in design features include changes in cross section of critical piston skirt zones in order to ensure higher load capacity and longer piston life.

Keywords: diesel engines.

A way of determination of crankshaft internal marginal dimensions is discussed. The method is based on determining the crank drive points' coordinates. Coordinates of connecting rod points in the connecting rod- related rectangular coordinate system are used as source data. Examples are presented of application of the method to in-row and V-shaped engines.

Keywords: diesel engines.

A model is offered consisting of two differential equations, which enables analysis of horizontal piston movement in high-speed diesel engine cylinder. Unlike known models, the one in question accounts for the piston moment of inertia as well as thermal, manufacturing process-related, and contact deformations of a piston and a cylinder liner. The example of calculations based on the above model is demonstrated applied to 12ЧН18/20 engine.

Keywords: diesel engines.

The research is discussed into exhaust gas recirculation as a means to improve exhaust gas heat recovery rate in diesel engine running at partial load. The appropriate equipment has been designed in order to increase overall efficiency of «engine-heat recovery boiler» installation and to attain better combustion quality.

Keywords: diesel engines.

The review of modern turbochargers' design features, based on CIMAC papers (Copenhagen, 1998).

Keywords: diesel engines.

The paper demonstrates characteristics of engine and turbocharger speed irregularity (detected both within one revolution and between sequential revolutions) as indicative of engine condition. Both time-related and frequency-related characteristics can be employed. Examples of fault localization are discussed.

Keywords: diesel engines.

Stochastic prediction models are offered based on exponential approximation and polynomial expressions for failure rate, empirical failure distribution function and probability of survival. The models in question employ generalized function method, method of least squares and correlation analysis. Typical calculations are presented applied to centrifugal and reciprocating pumps, turbochargers and fuel separators.

Keywords: diesel engines.

Lube oil compositions with various anti-friction and anti-wear additives have been tested. The tests have been targeted at evaluation of how each particular additive effected performance of such tribological situations as «gray cast iron cylinder liner-chromate treated piston ring», characterized by high friction of boundary. 30 tribological situations have been investigated. Resulting empirical curves have been analyzed in terms of structure/energy theory of wear. Functions yielded well fit the general energy-related wear model.

Keywords: diesel engines.

The article summarizes multiyear experience of the Marine Engineering Department of St-Petersburg Marine University in education of industrial engineers specialized in diesel engine production.

Keywords: diesel engines.

Method is offered of how maintainability can be evaluated of principal parts of a tractor diesel engine.

Keywords: diesel engines.

Procedure is offered for prediction of nitrogen oxides' emission at a design stage where main engine parameters are determined. Generalized analysis is provided of NOx emission as a function of heat release characteristics in high-speed engine cylinder. Quantitative evaluations are provided as applied to ЧН15/18 (BMD) engine model.

Keywords: diesel engines.

-

Keywords: diesel engines.

-