Implementation of a boost strategy for a diesel engine neutralization system based on integrated design techniques

The work is devoted to the strategy of boosting the neutralization system during the development or modernization of internal combustion engines while taking into account toughening environmental standards. Improving internal combustion engines and their environmental systems is a possibility of competition with electric vehicles, which development is proceeding rapidly. The world chronology of the development of environmental standards shows the main difference between the global environmental legislation and the Russian one, which is the lag in the implementation of norms for 2-4 years. This makes it possible to make decisions based on already implemented world experience in the development of neutralization systems. The goal of the work is to substantiate the main directions of developing strategic technical solutions for boosting neutralization systems. An engine analog with well-known characteristics was selected - YaMZ 6566. The possibility of forcing the standard engine on the basis of similar world experience is substantiated and a comparative technical and economic analysis of the applied solutions for the neutralization system is given, taking into account the possibility of using recirculation. Possible directions for improving work processes are considered, among them there are: optimization of the combustion chamber and compression ratio, changing the injection strategy, increasing turbocharging. According to preliminary data on the results of testing on the KAMAZ 740 engine, the ecological basic characteristic of the engine in PM - NOx coordinates was obtained, this allows predicting the result using technical solutions. Based on the results of the chosen strategy of forcing the base engine YaMZ 6566, the results of experimental testing carried out at Central scientific research automobile and automotive engine institute «NAMI» are presented. Variants of various technical solutions for boosting the neutralization system and their implementation in a pilot device are presented. The conversion values for various technical solutions for the neutralization system for the YaMZ 6566 engine are shown. The achieved NOx conversion of 97 % allows to meet the most stringent environmental standards. The possibility of making strategic decisions on boosting the neutralization system and their subsequent technical implementation when achieving the set values of the environmental performance of the engine is confirmed.

diesel engine, environmental standards, ICE boost, conversion rate