Keywords: diesel engines.

The up-date situation is considered in dieselengineering branch and proposals are made concerning the creation in Russia of State Scientific Dieselengineering Center.

Keywords: diesel engines.

Specific features are considered of supply and regulation systems of car gas engines (GE) designed in USSR. Here are shown their merits and demerits. System is described with fully-variable speed governing during GE operation according to gas-diesel or diesel cycles. It is notified that real reduction of liquid fuel consumption of gas diesel engine by means of substitution of its part for gas fuel can make up 50—60% because car engines operate on part regimes when gas consumption of GE is less than during operation on full power when using ignited diesel fuel.

Keywords: diesel engines.

Method is considered of calculations of derivative series of engines based on criteria of economic efficiency, providing minimum joint expenditures for derivative series as a whole and to satisfy the industrial requirements in quantity and quality of diesels.

Keywords: diesel engines.

Brief statement is given of engineering calculation method of local non-stationary working body temperature inside diesel combustion chamber. Here are considered concrete problems of evaporation, combustion and heat exchange solving which is necessary to calculate unknown temperatures. Results are given of calculative invesigation and main conditions are defined keeping of which is necessary for estimation the trustworthiness of the data recieved.

Keywords: diesel engines.

Comparison is given of experimental results and mathematical modelling in respect of influence of atmospheric conditions on working parameters of diesel 56 ChN16/17. Insufficient accuracy and universality is confirmed of simplified empirical formulas of engine power and efficiency depending on external conditions.

Keywords: diesel engines.

Mathematical model of a process is designed in fuel equipment of low speed engines in quazionedimensional state. Numerical decision of equations of non-stationary flow of compressed liquid in the channels of the variable section made by means of S.K.Godinov's method. The method is proposed of recieving equations of heavy fuel condition, creation of calculation sphere of fuel equipment of low speed engines. The comparison is made of calculations and experiment.

Keywords: diesel engines.

Partition of the flow, flowing—around liner surface in longitudinal direction into elemental streams permits to calculate speed fields and current lines by simple means of hydraulics of smoothy changing movements. Meanwhile stagnant zones and flow areas are shown on liner reamer by extreme current lines which have maximum length among geodesic.

Keywords: diesel engines.

The article proposes three types of probability tasks of technical diagnostics. Possibility is shown of their solution on the base of single mathematical structure connected with the family of q~X distributions.

Keywords: diesel engines.

It is shown that approximate estimation of efficiency according to I.S. Shlippe while variation of power and speed is given of threedimensional surface of fuel consumption with irregular grid in the plane of independent variables and coordinate mobel presented as a family of cross-sections with arbitrary position of units and complicated border of interpolation-approximation area. Here are presented the features of usage of coordinate model.

Keywords: diesel engines.

Investigation methodology is proposed on problem of rational utilization of fuel in diesel transport installation as complex technical systems. Conditions are considered of designing static and dynamic system models for fuel utilization system analysis. Procedure is proposed of fuel specification ranking for the existing diesel installation and choice of the best.

Keywords: diesel engines.

Here is considered diesel 6 ChN25/34 with turbocharging adeptable for operation during extremely variable change of load. On the base of theoretical and experimental investigation here is shown the possibility of improvement turbocharging diesel dynamic characteristics by means of optimization gas exchange process. Estimation factor of diesel dynamic characteristic is given.

Keywords: diesel engines.

Results are given of experimental and calculative investigations of the influence of border conditions of heat exchange of piston heat belt, defined according to early methods on temperature condition and heat balanse of pistons of high speed transport diesels. It is shown that piston temperature condition can be influenced by means of changing the width of working perring clearance «piston-cylinder».

Keywords: diesel engines.

Possibilities are considered of elimination of noxious volume of combustion chamber by means of decreasing the distance between plane of upper compression ring and upper piston edge. Side by side with this satisfactory level of temperatures should be provided in the zonen of maximum heat loading by means of selection the rational scheme of cooling liquid motion in socket cooling cavity and anodizing piston head surface.

Keywords: diesel engines.

Analytical dependence is recieved for calculation of the lowest permissible ring axial clearance up to lowel and upper supports of piston rings, if impact upon them is defined by speed recovery coefficient K. The curve is given of changing the value og necessary axial clearance depending on different ? values.

Keywords: diesel engines.

By the method of finite elements in three-dimentional laying problem is solved of stationary irrotational gas flow in the combined assembly «gas-intake body-turbine nozzle apparatus» turbocompressor TC-18. Influence is investigated of nozzle apparatus upon flow structure in gas-collecting body of axial type. Comparison is made between calculative and experimental values of flow angles at the body output.

Keywords: diesel engines.

Survey and analysis are proposed of fuel supply joint correctors of charging pressure and fuel viscosity of multifuel turbocharging diesels. Results of experimental investigations of different patterns of correctors are given. Recommendation of the scheme of joint fuel supply corrector is proposed.

Keywords: diesel engines.

Engineering methodology is proposed of estimation parameters of reliability, effectivity and durability of marine diesels during operation permitting to solve practical questions connected with estimation and increasing of service characteristics of the engine. It was noticed that design features and operation of diesel 6 ChN40/46 permit to prolong full service life before drafting out from 100 up to 200 thousands of hours.

Keywords: diesel engines.

The article which is a continuation of information proposed in magazine ?4—6, 1992, gives analysis of content and significance ofgroups of technological operation (control and protection, undivisible diagnostics, automation of installation, governing and governors, remote control) for perspective automation systems.

Keywords: diesel engines.

Method is proposed of strenghening crankshaft made of high-duty iron for auto engines ZMZ-53-11 by means ~of element deformation.

Keywords: diesel engines.

The description is given of new equipment for plasma high speed surface hardening. The mixture of air witg methane (propanebutane) is used as working gas for plasma and electric arc equipment. Technical characteristics and main technological oppoutunities are proposed.

Keywords: diesel engines.

Results are given of experimental investigation of oil consumption of high speed engines based on the influence of elasticity force near coupling, heigh of working belts and uniform distribution of elasticity force around the perimeter of oil piston rings. The results recieved for carburettor and diesel engine permit to recommend the usage of construction of oil piston rings working surface. The usage of such constructions permit to reduce oil consumption twice.

Keywords: diesel engines.

Investigation results are given of the working process of diesel 4 ChN11/12,5 using as an additive to diesel fuel biological waste of the following contents: ?-butanol, water, butilacetate in order to utilize these waste, to reduce toxicity and exhaust emission. By means of using the method of switching off diesel cylinders on partial load and the supply of alternative fuel into the line of high pressure nearbu nozzle the economy of diesel fuel is reached up to 30% and soot blow-out is reduced twice.

Keywords: diesel engines.

Analysis is made of reasons restraining the usage of known dependences of motor oils viscosity and temperature while fulfilling hydrodynamic calculations. Method is described basing on which a new formula was obtained to calculate the dynamic viscosity of motor oils depending on oil temperature and initial class index of oil viscosity. Results are proposed confirming universality and formula demanded accuracy in a wide range of motor oils working temperatures.

Keywords: diesel engines.

Main problems are considered of creation of installations of complex diesels gas purification providing NOx emission reduction up to 1,5 g/kWh and soot reduction up to 0,01 g/kWh. Two variants of technological purification are given in the form of test installations. First variant provides consecutive removing of soot particles from the flow; oxidation of gaseous products of ammonia (SCR-process). According to the second variant gas purification is provided by thermal treatment in furnaces of energetic and heating boilers.

Keywords: diesel engines.

A classification is offered of engines with variable compression ratio and actual volume. Specific tasks are formed at the stage of design of such engines within the limits of non-traditional constructiv diagram, particularly of drum type engines. An algorithm is described of definition of current values of the compression ratio and actual volume (the piston stroke) and correction of the crankshaft angle of rotation. Numerical investigations are carried out of dependence of the engine compression ratio and piston stroke on a number of its constructive parameters. Compression ratio and piston stroke are established to be controlled quite accurate and don't lead to the more complex technology of the engine assembly.