Abstract
Road transport, as is known, provides high mobility of the population and significant cargo turnover both on a regional and interstate scale. Unlike large stationary sources of pollution, road transport is a huge number of mobile units of equipment operating in various working conditions. Therefore, the report and control of harmful car emissions is difficult. Other consequences of rapid motorization of society are traffic congestion, increased delivery time for goods and passengers, noise and stress of road users, etc. Based on the analysis of the conditions and operating modes of a car in a dense traffic flow, typical for urbanized areas, the article shows the possibility of using the well-known method of exhaust gas recirculation for a new purpose. This is the forced idle mode of the engine, which occurs when the car is braked by the engine without shutting down the transmission, which is present in modern standards for limiting harmful emissions. It is shown that in the indicated mode, it is possible to carry out complete recirculation of gases in order to achieve short-term isolation of the engine from the atmosphere. At the same time, the usage of the gas recirculation method for the main purpose is not excluded – to reduce the emission of nitrogen oxide NO in the engine.