Keywords: diesel engines.

Reasonable fields of application are considered for medium speed engines in the shipbuilding industry. Service conditions of propulsion plants are analyzed on seagoing, fishing and auxiliary vessels and principle arrangements of diesel- reduction gear units are evaluated, the most suitable for operating conditions of above plants on ships of different types and applications.

Keywords: diesel engines.

Work which had been done is considered and also results of calculating and experimental investigations, bearing in mind the main trend to improve the design for the increase of the engine ChN25/34 technical level. The engine technology and parameter variation in the 10th year of the Five- Year Plan are shown.

Keywords: diesel engines.

Results of gas exchange investigation are given and also of effective and indicated data for the engine D145T with altered inlet and outlet cylinder head passages.

Keywords: diesel engines.

Frequency values of free torsional vibrations of a multi-mass system are clarified, taking into account the reciprocating piston and connecting rod movement as variable on their value masses. In this case frequencies are higher than at normal calculation. At the further calculations of forced vibrations there is a possibility to clarify resonance rotational frequencies and a damper value.

Keywords: diesel engines.

The non-linear mathematical model SARS is considered 0f the tractor supercharged diesel engine velocity, taking into account the fuel supply correction on rotational frequency and boosting pressure. Investigation results are given on a mathematical model compared with experimental data, obtained at tests of the tractor T-150K.

Keywords: diesel engines.

Engineering method is developed and approved of the analytical definition of the valve plunger pair geometry, controlled at the fuel supply end, related to fuel pumps for supercharged diesel engines. The calculating technique allows to project the plunger pair geometry for a minimum time spent, and to meet its requirements.

Keywords: diesel engines.

Semi-empirical expression is deduced, deinfing dependence of heavy oil fuel density on pressure. Having used it analytical dependences aie defined of interconnection of average and current fuel and pressure elastic modulus. Results of experimental definition of above dependences are given, that proves the physical interpretation of the fuel compression-extension process.

Keywords: diesel engines.

The technological provision of the engine quality is considered, regarding its alteration at development of the planning following the certain program and purpose in the diesel engine production. Example of diesel DN23/2X30 improvement is shown, proved technological service in gaining the engine model quality, its effect on constructive shapes, geometrical sizes and arrangement of main engine parts and units.

Keywords: diesel engines.

Main physical and mechanical properties of that new high duty vermicular cast iron are described. Advantages of its application for diesel engine casting are shown.

Keywords: diesel engines.

Investigation of 38HMJA steel electro-chemical corrosion in O. lm sodium sulphate at different sample vibration intensity. It is shown that under cavitation the steel corrosion is going with hydrogen depolarization. A method of selection of inhibitor additives for engine cooling water is offered.

Keywords: diesel engines.

A simple method of definition of the oil service life is shown for diesel engines, considering service conditions by means of an automatic control machine.

Keywords: diesel engines.

Investigation results are shomn on what caused the engine disbalanse increase at their operation and repair. It is discovered that the major disbalance causes the tolerance increase in main bearings, collection of wear and dirt products in the crankpin dirt pocket, dissipation of plug mass in the crankpin dirt pocket and crankshaft deflection.

Keywords: diesel engines.

Results are given of calculated investigations of the air temperature effect at the engine 6Ch 12/14 intake on its main data. It is shown that the permissible air temperature for the engine 6ChN2/14 at the nominal load operation will be 150˜ C.

Keywords: diesel engines.

Results of investigations are given of the atomizer body deformation of locomotive engine nozzle atomizers, depending on power, technological and constructive factors. Ways to decrease the influence of the atomizer deformation on the nozzle reliability are shown. A new nozzle construction is considered for engines type D100 after service tests have been made on locomotive engines up to 540 000 km runnfng (about 15 400 h).

Keywords: diesel engines.

Advantages of the use of mechanical loss power value are described as a criterion of the engine running-in evaluation. Alteration of this value is shown during the engine wear process. Results are given of investigations of temperature at engine friction.

Keywords: diesel engines.

The maximum available precision of stationary engine part temperature measurement is considered. Decision is recommended for definition of the top boundary of the measurement precision.

Keywords: diesel engines.

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Keywords: diesel engines.

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Keywords: diesel engines.

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Keywords: diesel engines.

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