Year: 2024
Type: conference-paper
Abstract: Increasing requirements for the environmental performance of agricultural transport vehicles require improvement of their design that will reduce emissions of harmful substances from exhaust gases. A method of estimating fuel efficiency and environmental performance of a wheeled tractor with a gas engine when performing transport works has been developed. A mathematical model of the wheeled tractor movement along the driving cycle has been developed. The mathematical model used the results of experimental studies of a gas engine. Bench tests of a diesel engine that was converted into a spark ignition gas engine for operation on natural gas were performed and they confirmed its operability and showed good operational performance. A wheeled tractor was converted to run on gas fuels using the same technology and elements. Its test results showed that there are certain peculiarities of driving such tractor due to the fact that the diesel tractor engine is equipped with an all-mode crankshaft speed regulator which is not used in a gas engine. A driving cycle was chosen to study the performance of a wheeled tractor when performing transport works. Environmental indicators and fuel consumption of a specific engine, that are used in the mathematical model, are described by polynomial models based on its experimental characteristics. Using the mathematical model of tractor movement during the driving cycle, the appropriate ways of controlling the transmission and gas engine during tractor movement were determined, in particular, the proper order of gear shifting when the tractor is accelerating. The total emissions of harmful substances during the driving cycle of a tractor both with a gas engine and a diesel engine were calculated, which prove the environmental feasibility of using gas fuel. The total toxicity of exhaust gases, reduced to carbon monoxide CO, of a tractor with a gas engine is 1.9 times lower than of a diesel engine.
Institution: Lutsk National Technical University
Language: English
Topic: Engine and Fuel Emissions
Subfield: Automotive Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4400246643