Keywords: engine.

Main experience results are given of the operating process improvement and decrease of mechanical losses. The more efficient ways are defined to increase the fuel economy for diesel engines ChN25/34.

Keywords: diesel engines.

The improved technique for investigation of the liquid fuel distribution over the diesel engine torch volume is offered. As investigation result two parts in the torch volume are revealed: a nucleus, where fuel is going to the torch front, and envelope, where delayed fuel particles are collected. Within the investigated range of the backpressure 70 to 90% of fuel is going through the section at 140 mm distance from the nozzle hole of 0.53 mm diameter.

Keywords: diesel engines.

An analysis of the heat release process is described, considering the starting air mass and energy. It is defined that under lower temperature conditions, due to timely starting air delivery, there is a possibility to prevent the charge over- cooling in working cylinders during the engine start, using compressed air.

Keywords: diesel engines.

Results are analysed of the experimental investigation of a complex heat exchange in the cylinder of a low speed marine diesel engine, type DKRN74/160-3, which can be taken as a background to evaluate the heat stress condition of the engine piston group elements and favour to optimize their cooling system.

Keywords: diesel engines.

Method of the economical effectiveness evaluation of the heat delivery is shown, based on the analysis of the centroid area arrangement made by the curve of the heat delivery intensity and absciss axis, related to the top dead centre of the indicator diagram.

Keywords: diesel engines.

Special features are considered of the technique of numerical solution of equations for multi-dimensional gas dynamic for engine intake manifolds, developed at CNIDI.

Keywords: diesel engines.

Calculation algorithm is described of the ideal gas one-dimensional flow, using the «disintegration breakage» method in the engine air channel of the variable cross-section area. Differential diagram and external boundary conditions are given. Features of the method compared with the characteristic method are analysed.

Keywords: engines.

Two main mathematical models of the agent non-stationary movement in internal combustion engines are considered and evaluated. A model is offered, synthesizing main and non-stationary ?]????? phenomena, accompanied by intensive dissipation energy. In utmost cases this model can be equivalent to the main model. The model gets satisfactory coincidence with the experiment both in pressure and in the law of variation of the agent temperature time.

Keywords: engines.

Results are given of investigations of the fluctuating flow average consumption measurement by flowmeters with narrowing devices, and also criterion modelling conditions for non-stationary gas flow by incompressive liquid, formula for evaluation of the local acceleration effect on the measurement errors, and a mathematical model of the measurement errors for the fluctuating flow average consumption by flowmeters with narrowing devices.

Keywords: engines.

The formula derivation is given for calculation of the mean indicator pressure in a cylinder with a link connecting rod, on the developed indicator diagram, considering the piston kinematics features in such a cylinder, and a working formula for calculation of pi in engines 12ChN18/20. Two methods of grouping are shown to determine harmonic scanning factors of the indicator diagram.

Keywords: engines.

Technique is given of definition of torsional vibration spectra of engine crankshafts, allowing to simplify essentially the experimental data processing technique.

Keywords: diesel engines.

Construction is given and the action principle is considered of a two-impulse speed governor for a car-and tractor engine, a sensitive element of which has both tachometer and accelerometer features. Results are given of theoretical and experimental investigations of a control system with the two-impulse governor.

Keywords: engines.

Main prerequisites are considered for an analytical model, based on statistic analysis and collection condition results to calculate optimum values of shape deflection and conjugate surface arrangement. For the first time a method of evaluation of technological precision and precise pair complicacy is offered.

Keywords: engines.

The portable express-laboratory is described for analysis of used oils at the engine operation. Advantage of this developed laboratory is shown in comparison with the existing.

Keywords: engines.

Calculation and profiling technique is described for radial double-row arc diffusers, intended for centrifugal engine superchargers.

Keywords: engines.

The technique is offered for calculation of dispersed water particle composition in artificially irrigated diesel fuel, for construction of characteristics and definition of main constructive parameters of diesel engine fuel tanks. Calculation results are given in comparison with experimental data.

Keywords: engines.

Effective methods are described to improve the diesel engine piston operation. These methods are based on scientific and technical experience of diesel engine Works and others.

Keywords: engines.

Mechanical properties are described and advantages of heat resistant steel 50X25N4AG9M4B after electroslag remelting. The way to use steel to improve the service life of high loaded diesel engine and turbocharger details is shown.

Keywords: engines.

High alloys on chrome base are shown to be smelted in open induction furnaces, being second to none in mechanical properties, similar to vacuum smelted alloys.

Keywords: engines.

Method of calculation is shown of economical and energetic data of the diesel engine operation in case of cutting-off arbitrary number of cylinders under load characteristic conditions. Variation of data is analysed, taking as an example a marine diesel engine.

Keywords: engines.

Investigation results are given and analyzed of temperature condition of cylinder heads made of cast iron and aluminium alloy at marine small size diesel engine operation on load and helical curves, at the whirl combustion chamber and the combustion chamber in the piston, CNIDI type. Conclusion is given for application of cylinders made of aluminium alloy for marine diesel engines, type 4ChSP8.5/l 1 with the combustion chamber in the piston, and the original constructive design of cylinder heads is offered.

Keywords: engines.

Results are given of experimental investigation of the multi- cylinder petrol engine texicity, the engine fitted with the electronic fuel injection equipment AVTE-2 at the power control by means of variation of a number of operating cylinders, being cut-off for the time commensurable with the heat cycle duration.

Keywords: engines.

System of the automatic control is considered for marine automated on the third degree (GOST 10032—69) diesel-generators DGRZA100/750 and DGRZA150/750. Brief technical characteristic of units is given, and also the volume and algorithm of the automation system operation. Principle solutions are described, provided these diesel-generators to belong to the highest category of quality, following the technical level.