Vol 79, No 7 (2012)

Analysis of results of engines' bench tests and pilot design tractors' draft tests is presented. These experimental models passed the acceptance testing on machine testing station.

The injection gas fuel feed system, in which not only the redistribution of cylinder-by-cylinder fuel supply takes place, but also gas and air mixing is ensured, was under study. Fragments of the research results are presented. Stable engine operation under different loads and substitution of diesel fuel by the gas one up to 80% are proved by bench tests.

A method of wheel tractors slipping curve construction for the purpose of automated predicting estimation of traction and power indicators is considered.

Advanced method of motor and tractor diesels' operation control at no-load mode and machinery for its implementation are described. The mode of periodically repeating strokes of cutting of fuel feed and its subsequent resumption on the level securing the most economic behavior of diesel engine operation in the reduced rotating frequency range of a crankshaft allows to lower the hourly fuel consumption and to improve the ecological indicators in comparison with diesel engine operation in typical operating conditions of independent idling.

Models of stochastic processes possessing the given correlation function and the standard one-dimensional distribution density are analyzed. It is shown that contrary to expectations the introduction of auxiliary condition of one-dimensional distribution density normality into a random frequency model substantially worsens the reproduction accuracy of Gaussian processes.

Moving of bulk material in a spiral-screw mechanism is considered from the viewpoint of Lagrange theory. Radiographs representing a quasidynamical pattern of drift of a marker are used.

Several variants of bench equipment for the examination of static, dynamic and resource characteristics of vibration isolators made of elastomer are presented. An advanced design of standard vibration isolator is suggested.

An attempt of theoretical determination of velocity of the charged particles' drift between electrodes during the electrical-discharge machining depending on voltage on electrodes and environmental parameters is carried out.