Keywords: diesel engines.

A clarified technique is proposed of the calculation of heat exchange parameters in the gap: the piston combustion zone-cylinder, which can be used at modelling of the thermal stress condition of diesel engine pistons as boundary conditions for the heat exchange on the combustion piston zone surface. The analysis of the calculation results allowed to establish connection between geometric perameters of the combustion piston zone and heat exchange parameters in the superring gap: the piston head-cylinder.

Keywords: diesel engines.

Results are given of experimental investigations of the fuel efficiency and exhaust gas toxicity (OG) 6Ch13/14 (YaMZ-236) re-equipped as the gas diesel engine, operating on diesel and gas diesel cycles, using the natural gas. The mass production diesel engine, operating on the gas diesel cycle, is shown to have its power output higher than the basic diesel engine on the permissible OG smoke limit.

Keywords: diesel engines.

On the base of the analysis of dependence of parameters and thermal balance of the turbocharged diesel engine with the charge air (ONV) cooling system it was established that under typical for a modern diesel engine values of the mean gas temperature in the cylinder and its heat transfer walls increase of the air cooling depth is followed by the increase of the heat transfer into the cooling liquid (TOZH). Regulations are defined of variation of heat transfer components of the diesel engine with ONV, as well as hypothetical conditions, where the use of ONV would not increase TOZN.

Keywords: diesel engines.

Results are given of the investigation of the locomotive diesel engine lODlOO and development of conditions for the running-in of a modernized diesel engine 10D100M on the base of regulations of the material running-in of main detail conjugations of the diesel engine friction. Consideration of tribotechnical properties of conjugation friction materials allows to shorten the diesel engine running-in time, and decrease the running-in wear.

Keywords: diesel engines.

On the base of the calculation investigation requirements are defined of fuel equipment (ТА) characteristics of a main marine diesel engine, considering features of operating conditions. At the diesel engine operation on the regular characteristic ТА speed droop is shown not to effect quality parameters of processes in SARCH.

Keywords: diesel engines.

An analysis is carried out, using the computer, of thermal and stress-deformed conditions of a piston having the combustion chamber with a narrowed throat under nominal diesel engine operating conditions. A nature is defined of the distribution and variation of the strength factor in a dangerous piston section when combustion chamber have different constructions.

Keywords: diesel engines.

Conditions are considered of the operation of the supercharger type RUT as a second stage of the two-stroke engine supercharging, a g. operating conditions where the air pressure before the supercharger is higher that the air pressure after it. Results are given of the analysis of the different factors effect on above operating conditions, and results of supercharger RUT tests, RUT used on the engine 12DN 23/30 under engine conditions to define its adiabatic efficiency and coefficient of admission. The supercharger RUT is shown to operate under above conditions as an extension machine, a part of its air flow energy transferring to the engine crankshaft.

Keywords: diesel engines.

A method is offered of check effectiveness of different correction algorithms of ignition angles of advance in the detonation suppression system, based on the mathematic modelling of the engine operation, м- чц such a system. Parameters of the correction algorithm ire considered as well as criteria of its effectiveness. Examples of calculations are given. This method is shown to be used at development of detonation suppression systems.

Keywords: diesel engines.

At the increase of p„„p the heat release speed is shown to increase both at the fuel delivery period and at the given pariod after it has finished. Time of the ignition delay and of kinetic combustion at higher pressure within above limits (from 38 to 74 MPa) is actually unchanged.

Keywords: diesel engines.

A technology is considered of pre-design investigations, made on the alternative or joint use of three methods: a method based on the analysis of the current information of quality parameters, a method of the analysis of thermodynamic heat engine cycles and method of evristic manner to make principle engine diagrams.

Keywords: diesel engines.

A comparative analysis is carried out of methods to measure forces and friction operation in the cylinder-piston group of an internal combustion engine. Effectiveness is shown of the use of modifications of the measurement bands method.

Keywords: diesel engines.

Results are given of the development and investigations of a delivery valve (NK), having a minimized internal cavity volume, that comparing with the NK of a fungus type, gives a possibility to increase essentially intensity of the fuel delivery by the high pressure pump: to increase the mean injection pressure by 40%, the pump delivery coefficient by 25%. The use of the experimental NK in the diesel engine 6DM-21 (6ChN21/21) fuel equipment allowed to improve the fuel effectiveness by 2.5%, decrease the exhaust gas smoke under nominal operating conditions 1.6 times, under maximum frequency at idling three times.

Keywords: diesel engines.

Developed by authors a floating drainage device is described for an automatic separation of liquids, having different density, for example, for drainage of condensed water from the fuel tank. A calculation method is described for constructive elements of a floating valve, and a calculation example is given.

Keywords: diesel engines.

Investigation results are given of a two-stage rotation air cleaning device. This device is shown to have the high separation ability of solid particles at the permissible level of the aerodynamic resistance.

Keywords: diesel engines.

Results are given of investigations of the effect of the axis- radial wheel blade form, defined at the change of constructive angles of the blade from its inlet to its outlet, on the effectiveness of the centrifugal compressor, having the pressure ratio 3,5.

Keywords: diesel engines.

Systems and methods are described of the automatic control of the operating cylinder number in microprocessors (MP) of automatic control systems, using information of the SARCH variation of MP and using the controller of the operating cylinder number, provides conditions next to optimum ones in operating cylinders.

Keywords: diesel engines.

A unitizing model of a marine power plant is described (SSU). This model is a mathematical diagram, presenting an assembly of SSU functional systems, keeping links, providing the interaction of these systems. The unitizing model is the base for the mathematical description of the SSU functioning and development of the software of computers, operating for simulators.

Keywords: diesel engines.

A construction is described of a volumetric type filter element made of deformed porous material, having high reliability. An analytical solution is described of the task of the clear opening evaluation, as well as calculation dependences of effectiveness parameters of the oil cleaning on contamination, considering the filter element construction. The possibility is shown to make filter elements of a volumetric type, their reliability can be compared with the one of superficials.

Keywords: diesel engines.

Results are given of test bed rigs of additives PAF-4 and OMO-5 in engines ZMZ-53, having the wear resistance and lubrication properties of the motor oil MBVi.

Keywords: diesel engines.

An analysis is given of the operating reliability of marine low speed diesel engines MANK8Z70/120E on ship boards type Varnemunde. Their operating features are considered, principles and nature of their failures and defects are analyzed. The technique is described to control the thermal stress of the main diesel engine with the profile cylinder scavenging on the indirect thermal stress parameter.

Keywords: diesel engines.

A diagram is described to control the predetermined cylinder cutting-off, and results are given of the engine 6ChN21/21 operation on the locomotive characteristic at the preheating under hot deposit conditions and under low speed at idling when the cut in cylinder number is different.

Keywords: diesel engines.

A new technique is offered of the technical-economical grounding of advantage to repair details. It considers: capital and current expenses, programme of the reconstruction, possible transport expenses, ratio of inter-repair life of the detail and the object to mount this detail. Examples are given of how to use the above technique.

Keywords: diesel engines.

A number of measures is described on improvement of the fuel effectiveness as well as the power under nominal conditions from 880 to 1000—1100 kW of the locomotive diesel engine D50 (6ChN31.8/33).

Keywords: diesel engines.

Results are given of the experimental definition of the effectiveness of the method to cut-off cylinders of the diesel engine KamAz-740, its effect on economic and ecologic parameters of the diesel engine operation.

Keywords: diesel engines.

Information is given of test rig of diesel engines for an industrial tractor, operating under type operating conditions. Evaluation is given of main components of the oil consumption for melting loss.

Keywords: diesel engines.

Tendencies are considered to develop automobile and tractor diesel engines abroad. The analysis is given of main directions of development of diesel engine constructions at leading foreign companies to decrease exhaust gas toxicity, noise level, mass-dimension parameters, improvement of the fuel effectiveness and service life.

Keywords: diesel engines.

Charakteristic combustion features are considered of the stratified air-gasoline mixture and formation at that of exhaust gas toxical components. A comperative analysis is given of parameters of the gasoline engine cycle and the high operation effectiveness is defined, which can be reached by the stage combustion of the deep stratified operation charge.