Keywords: diesel engines.

Retrospective of Chelyabinsk Tractor Works history precedes the review of engines designed by TRANSDIESEL design office, intended to power military vehicles. Principal ways of engine improvement are determined with a view to meet needed power and fuel efficiency specifications. This article opens a series of publications covering historical aspects of military engine development at Chelyabinsk Tractor Works, new commercial engines, and lines of research work.

Keywords: diesel engines.

Presented are principal specifications of new low-power diesel engines sized at 8,2/7,8 and 9,2/7,8 (cylinder bore / piston stroke, dm). Another new diesel engine family 13/15 is designed to power class 6...20t tractors. Some of the above engine models are already commercially available, while other yet under design.

Keywords: diesel engines.

Analysis is offered of current trends in engine piston design. The authors investigated influence of geometric parameters, such as piston & cylinder liner profiles and diametrical clearance, on hydromechanical characteristics of «piston/cylinder» tribological situation. Certain changes in cylinder shaping are shown to result in improvement of the above characteristics.

Keywords: diesel engines.

A possibility is discussed to possibly extend ЧН26/26 engine family with new series of middle-speed engines having odd crankweb number, i.e. 10-, 14-and 18- cylinder models. The authors investigated related issues of torsional vibrations and engine balancing.

Keywords: diesel engines.

Bearing strength of high-powered diesel engines can be substantially increased by surface plastic deformation of profiled engine parts, combined with material magnetoelasticity measurements during part machining.

Keywords: diesel engines.

The article discusses comparative solutions of gas flow test task using commercial software package Star-CD and (Russian make) large particle method. The latter is shown as simpler and less demanding in terms of computer resources, being not inferior in precision of gas-dynamic flow simulation. Therefore, large particle method may be recommended for use in refinement of engine breathing system.

Keywords: diesel engines.

Presented are the results of measurements of engine part temperature with CDMT (crystalline detector of maximum temperature). The method is described of how to measure temperature and determine heat-transfer coefficients of engine piston and cylinder block.

Keywords: diesel engines.

Description is given of forced oscillations of air-hydraulic antivibration mount. The analysis of gain-frequency characteristics demonstrates stability of the system in question.

Keywords: diesel engines.

Results are described of testing a pre-production sample of new 4-stroke carburetor engine (type DNB-4) developed at the State University of Space Instrumentation Industry and manufactured at JSC Turbo-Motor Factory. The engine employs unconventional combustion process and features power transfer train with no connecting rods.

Keywords: diesel engines.

Use of static frequency converters for reversible diesel-generator start is a way to substantially increase efficiency and enhance applicability range of electric engine starting, because the technology in question eliminates a need for electric starter, and is less demanding to characteristics of autonomous power supply (accumulator battery). Static frequency converters are widely used in numerous industrial applications in conjunction with induction and synchronous electric drives. However, frequency diesel-generator starting method was not actually given any detailed consideration as yet.

Keywords: diesel engines.

The article describes modernization of cylinder lube oil system of low-speed crosshead type marine diesel engine, including test results and generalization of field experience. Annual lube oil saving due to such modernization totals to 6% per cylinder. Also, modernized lube oil system enables extension of a period between maintenance (cleaning) of under-piston parts of cylinder liner walls and ports to 300 hours, along with reduction in work hours involved.

Keywords: diesel engines.

Algorithm is presented usable for plotting diagnostic characteristics of fuel injection system of marine diesel engine, based on hydrodynamic method. Test results well match calculated values, which allows to recommend the method in question for practical implementation.

Keywords: diesel engines.

Geomodifiers in the form of additives to lube oil are shown as efficient means of friction assemblies' rehabilitation. Mechanism of geomodifier action is considered.

Keywords: diesel engines.

The article discusses existing criteria of motor oil quality evaluation and selection. Based on comparative analysis thereof, a way to improve said criteria is offered. Based on selected parameters and similarity theory, non-dimensional criterion is offered for motor oil quality evaluation («functionality» criterion), and its dependence on oil «rigidity» criterion. Experimental relationship coefficients for various types of diesel engines are presented in a table.

Keywords: diesel engines.

The article discusses productivity and fuel efficiency of heavy mine dump truck. The issue is topical because service hours-related degradation of engine conditions results in power decrease and growing difference between the biggest and the lowest power limits.

Keywords: diesel engines.

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Keywords: diesel engines.

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Keywords: diesel engines.

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