Abstract
In a regular drive system, with an internal combustion engine, vehicle braking is connected with the unproductive dissipation of ki-netic and potential energy accumulated in the mass of the vehicle into the environment. This energy can constitute up to 70% of the energy used to drive a vehicle under urban conditions. Its recovery and reuse is one of the basic advantages of hybrid and electric vehi-cles. Modern traffic management systems as well as navigation systems should take into account the possibility of the energy recovery in the process of regenerative braking. For this purpose, a model of a regenerative braking process may be helpful, which on the one hand will enable to provide information on how traffic conditions will affect the amount of energy dissipated (wasted) into the atmosphere, on the other hand will help to optimize the route of vehicles with regenerative braking systems. This work contains an analysis of the pro-cess of the regenerative braking for the urban traffic conditions registered in Gdańsk. A model was also presented that allows calculat-ing the amount of energy available from the braking process depending on the proposed variables characterizing the vehicle traffic conditions.
Highlights
The increasing traffic intensity in cities and the rapidly growing population of the large agglomerations causes a continuous increase in CO2 emissions and harmful compounds from the combustion of conventional fuels [4]
This work contains an analysis of the process of the regenerative braking for the urban traffic conditions registered in Gdańsk
It can be observed that lower average speed corresponds to higher share of the regenerative braking specific energy (71%), which comes from typical city center traffic conditions – high number of stops and braking phases
Summary
The increasing traffic intensity in cities and the rapidly growing population of the large agglomerations causes a continuous increase in CO2 emissions and harmful compounds from the combustion of conventional fuels [4]. Using hybrid and electric drive systems, it is possible to use regenerative braking energy [3, 5], which means that the fastest route, with a limited number of braking processes, will not always be the most energy-efficient way. It is necessary to consider the possibility of regenerative braking when planning the route of such vehicles, which is not implemented with the use of today's car navigations For this purpose, a model of a regenerative braking process may be helpful, which on the one hand will enable to provide information on how traffic conditions will affect the amount of energy dissipated (wasted) into the atmosphere, on the other hand will help to optimize the route of vehicles with regenerative braking systems. The model is evaluated using mean cycle parameters, which is crucial for storing data from real world traffic
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