Browse Publications Technical Papers 2018-01-0784

Reducing Harmful Emissions of the Vehicular Engine by Rapid After-Start Heating of the Catalytic Converter Using Thermal Accumulator 2018-01-0784

The article examines the peculiarities of evaluating the vehicular engine harmful emissions in different heating modes when using thermal development system of the catalytic converter within phase-transitional thermal accumulators. The system under review uses thermal energy from different sources of the vehicular engine during its operation to accumulate it in thermal accumulators.
The functional scheme of thermal development of the “vehicular engine - thermal accumulator - catalytic converter” system is shown. The functional scheme takes into account fuel consumption, mechanical energy and harmful emissions when operating the vehicular engine equipped with the exhaust gases cleaning system and the thermal development system with phase-transitional thermal accumulator. The article shows main mathematical dependencies to describe the processes of thermal development of the vehicular engine and the catalytic converter when using thermal development system with phase-transitional thermal accumulator.
The article presents experimental research results of the catalytic converter temperature condition when using thermal development system of the vehicular engine in different heating modes. To investigate the impact of thermal development system design and regulation parameters on thermal development performance of the vehicular engine and exhaust system, the information system structure is shown.
A numerical experiment has shown that without additional heating means rapid thermal development of the catalytic converter to Light-off point is possible only when the vehicle is in motion.
Using thermal development system of the vehicular engine catalytic converter can reduce the time of achieving the vehicular engine complete heating and the catalytic converter Light-off point by 54.5% -61.1% under changing operating conditions.


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