Denisov A.C., Galiyev P.K., Kulakov A.T., Kovalenko S.Yu.
ENSURING MAINTAINABILITY OF THE NITRATED CRANKED SHAFT WITH ELECTROEROSIVE PROCESSING OF NECKS ^{[№ 4 ' 2015]}
Results of the research aimed at providing maintainability of the nitrated cranked shaft are presented in this work. The analysis of operational reliability of KamAZ engines with the nitrated cranked shaft showed high wear resistance of these shafts. At the same time, the teases arising at operation on necks of a shaft it is almost impossible to eliminate with the standard methods of processing because of the high hardness of a blanket, and the surface on the nitrated layer is impossible that leads to utilization of a shaft. Besides, thickness of the nitrated layer is smallest that allows to process a shaft no more, than on one repair size. Thereof, maintainability of the nitrated cranked shaft is the extremely unsatisfactory and considerably increases costs for operation of vehicles. So, at the average market price of a cranked shaft of 93 thousand rubles. The program of production of 50 thousand engines and level of annual rejection of 0,03 losses of consumers will make 697,5 million rubles. The possibility of a surface of necks of the nitrated shaft in operation requires removal of the nitrated layer with the minimum expenses of resources and time. One of the technologies meeting these requirements is the developed technology of repair with removal of the nitrated layer in the electroerosive way on depth of 0,4 mm in a condition of the main structure that provides possibility of induction training or a surface without emergence on cranked shaft of cracks, peelings, blistering. After that necks of a shaft strengthen TVCh and resurfacing in the conditions of manufacturer or build up with the subsequent polishing and polishing in the conditions of repair productions in the established sizes. The subsequent repolishing of necks on the established size allows to restore to 80 % of cranked shaft with teases of necks. The offered technology showed the working capacity and efficiency at tests, is applicable both in the conditions of repair production, and in the conditions of manufacturer with use of the standard equipment with considerable economy of resources in comparison with the existing repair methods.

Kulakov A.T., Gaffarov G.G., Akhmetov M.H.
THERMOTENSION OF A CYLINDERS SLEEVE OF THE KAMAZ FORCED ENGINES ^{[№ 4 ' 2015]}
In work results of research of a thermotension of details of interface "the top landing belts of a sleeve of the cylinder — the block of cylinders" at the forced diesels KamAZ are presented. Relevance of research is caused by identification of the reasons of a high pressure the crankcase gases, emission of oil through system of ventilation of a case in the atmosphere at operation of engines. Sleeves of the forced diesels are characterized by high thermal and mechanical tension. On the basis of bench tests of the engine with experimental sleeves the temperature condition of the top landing belt of a sleeve of the cylinder is determined by temperature of melting of the witnesses established on them from POS 61 solder and the settlement analysis of a heat-stressed condition of details of the studied interface is carried out. As a result of calculation it is established that during the operation of the engine on the nominal mode in the considered interface instead of a gap the tightness that causes increase in deformation of a sleeve of the cylinder in addition to its assembly takes place. It can become the reason of breaks of gases from the combustion chamber in an engine case with emission of oil through system of ventilation the crankcase gases in the atmosphere subsequently. The constructive changes offered in work for installation of a sleeve of the cylinder in the block of cylinders allow to organize intensive compulsory cooling of the top zone of a sleeve of the cylinder, to reduce its temperature, thereby to reduce deformations.

Kulakov A.T., Frolov A.M., Gattarov I.F.
INFLUENCE OF COMPOSITION FUEL-AIR MIXTURE INDICATORS FOR BUS GAS ENGINE ^{[№ 10 ' 2014]}
The article presents the results of running and bench testing of the gas engine of the bus with a catalytic converter. The data on the effect of the composition of the fuel-air mixture to the environmental and economic performance, and reliability of the gas engine.

Yakubovich I.A., Kulakov A.T., Shafeev D.R.
IMPROVEMENT OF KAMAZ-7403 ENGINES CHARACTERISTICS BY AUTONOMOUS SUPPLY OF OIL TO TURBOCHARGERS ^{[№ 10 ' 2014]}
Results of bench tests of the KAMAZ-7403 engine with an oil supply are given to TKR 7N-1 turbochargers from autonomous system of oil supply. It is established that pressure increase to 0,7 MPa provides more intensive greasing and heat removal. Influence of increase of pressure brought from autonomous system of supply of oil to turbochargers of the engine on its parameters is estimated.

Husnetdinov Sh.S., Kulakov A.T., Kovalenko S.Yu.
RESTORATION OF OPERABILITY OF COUPLINGS OF TRUCKS BY THE ADVANCED REPAIR KIT ^{[№ 12 ' 2013]}
In work the problem of increase of reliability of couplings of trucks is solved with the cross-frictional coupling at the expense of an advanced repair kit. The way of centering of leading disks is offered and experimentally reasonable, the technology of restoration of couplings with application of an advanced repair kit is developed.

Gaffarov A.G., Kulakov A.T., Denisov А.S., Makushin A.A.
THE AUTOTRACTOR ENGINE TURBOCHARGER BEARING MOUNT ASSEMBLY PERFECTION ^{[№ 10 ' 2011]}
Results of analytical and of the experimental study of termal stress conditions are given for turbocomressor parts of the diesel engine. The design of an advanced bearing mount assembly and thermal protection of elements turbo-supercharger is resulted. Possible solutions of thermal turbocomressor problems are considered at the given level of charging.

Kulakov A.T., Denisov A.S., Makushin A.A., Barylnikova E.P.
RESEARCHING OF ENGINE CRANKSHAFT BEARINGS WORKING CONDITIONS ^{[№ 10 ' 2011]}
The paper presents results of experimental investigations of working conditions crankshaft bearings of internal combustion engine. A technique for measuring the actual flow of oil from the third cervical to crank the engine running. It is established that the actual consumption in the pressure of 0,3 MPa below the attainable (demand). The effect of "pulsations" of oil flow from the third crank neck. These factors may be reasons for turning the crank journals.