INTEGRATION OF HYDRAULIC CONVERTER AS VARIABLE FLOW PUMP IN THE HYDRAULIC-HYBRID PROPULSION SYSTEM

Abstract

The objective of the paper is the implementation of hydraulic converter as pump with variable flow as applied to hydraulic-hybrid propulsion system with application to vehicles. Currently, the main requirements imposed on the propulsion systems for motor vehicles related emissions that contribute to global warming and other energy use than petroleum because they are limited and growing consumer needs. To resolve issues of limited resources and pollution, have developed a series of technical solutions which means radical changes in propulsion systems. Hydraulic-hybrid propulsion system has in his building, components made from relatively simple and well-tuned processes of common materials with relatively low cost compared with other components of hybrid vehicles. A disadvantage of the hydraulic-hybrid propulsion systems is bound to efficiency less than mechanical transmissions. For this reason it is investigating ways to increase the hydraulic efficiency for example hydraulic pumps and motors with variable flow, that allow internal combustion engines to operate at constant speed system leading to an operation with low consumption and pollution. Conventional solution pump with variable flow is affected by a variable yield and constructive complexity. Solution considered in the paper is the hydraulic converter. In this paper, is done a simulation of hydraulic converter which generates the necessary hydraulic energy for hydraulic-hybrid propulsion system and then are compared with variable flow hydraulic pump efficiency to that of hydraulic converter. The method of analysis used in the simulation achieve hydraulic converter is AMESIM. The analysis in this paper is the hydraulic converter. The work presents the hydraulic converter for various constructive variants and operating modes.