Remigiusz Jasiński

Development of alternative ship propulsion in terms of exhaust emissions

The introduction of new emission limits for exhaust emissions of ship engines contributes to the development of new powertrain solutions. New solutions in the simplest approach concern the reduction of the concentration of sulfur in motor fuels. Typically, the aforementioned fuels have a lower value of viscosity which causes a number of supply system problems. It is becoming more and more common to use fuel cells in engine rooms of various types of marine vessels. Unlike conventional systems that use internal combustion engines, these systems have zero exhaust emissions. Hydrogen, methanol, methane and other substances may be used as a fuel in fuel cells. However, so far the best operating parameters are manifested by cells powered by hydrogen, which is associated with difficulties in obtaining and storing this fuel. Therefore, the use of turbine engines allows the obtaining of large operating and environmental advantages. The paper presents a comparison of the ecological parameters of turbine and piston engines.

The impact of operating parameters of tractor's engine on exhaust emissions

At the beginning of the twenty-first century, one of the major challenges of humanity was to reduce the negative effects of civilization development. Besides the engines used in road vehicles there is a large group of engines for nonroad applications. This group includes motor propelled vehicles not used on the road NRMM (Non-Road Mobile Machinery). Engines of these vehicles, among all of the non-road applications, are characterized by very specific working conditions that do not allow them to be qualified for propulsion engines. The main problem with these vehicles is the particulate matter and nitrogen oxides emission. The paper presents an analysis of the operating parameters of an engine and exhaust emissions of a tractor operating on a chassis dynamometer. Studies of the tractor involved measurements of engine operating parameters and the concentration of harmful substances in the exhaust gases. Information about the parameters of the engine and the intensity of emissions were obtained during the dynamometer test. The study included a comparative analysis of the operating parameters of the engine obtained from the diagnostic system and direct measurements on a chassis dynamometer and a correction of the torque obtained from the vehicle computer system was made. As a result, values of specific emission during engine tests under varying values of load were determined.