Creation of the electro-hydraulic valve drive of the valve train in conditions of autonomous locomotive thermal power plant

Abstract

A crucial task in the development of new models and improvement of the already developed locomotive thermal power plant is the development of measures aimed at improving fuel efficiency at operating modes. One of the technical solutions is to ensure the most efficient change of working mass in cylinders by flexible control of air supply parameters, which is achieved by the use of alternative adjustable valve drives of the valve train (GRM).

In the article the theoretical analysis of controlled and uncontrolled valve timing is conducted (FGR), which showed that the most promising way to achieve the best fuel efficiency at partial operation modes of the power plant is the use of controlled valve timing. Calculation-theoretical researches on definition of optimum phases of valves on modes, different from nominal for engine type ChN26/26 are carried out. Alternative drives of gas exchange organs for vehicles and power plants are analysed. The choice of replacing the basic valve drive with an electro-hydraulic drive in locomotive plant conditions is justified. An electro-hydraulic system for controlling the exhaust valve phases is created, for which a principle scheme of operation is developed and its sketching is carried out.