Abstract
The paper presents the proposed proprietary M exhaust emission indicator, which is based on the assumption that CO2 emissions are a measure of the correctness of the combustion process. The measurements were performed using a farm tractor meeting the Tier 3 emission norm, operated in real conditions during plowing work. The tests were carried out for a given land section at three speeds In the analysis of test results, the net engine work was used, as it is carried out in the type approval procedures. When measuring in real operating conditions, the torque read from the OBD system is overstated because it takes into account the engine’s internal resistance. In the analysis of test results, the fuel consumption, emission indicators of gaseous compounds and particulates were determined, and the best conditions for conducting agricultural works were indicated in terms of their impact on the natural environment. The aim of the work is to verify the possibility of determining the emission index for an off-road vehicle and a comparative analysis of its values for various operating parameters of a farm tractor. On this basis, it was found that the lowest values of the M identity were recorded for the test characterized by a vehicle speed of 15 km/h.
Highlights
Manufacturers of agricultural vehicles and machines equipped with internal combustion engines make continuous efforts to reduce the negative impact of their products on the natural environment
Considerations are being made to introduce a reduction in CO2 emissions, which is equivalent to a reduction in fuel consumption
In order to perform research on the evaluation of the emission indicators during a typical agrotechnical task performed by a farm tractor, the characteristics of the exhaust emission intensity as a function of engine rotational speed-load (n-T) were analyzed
Summary
Manufacturers of agricultural vehicles and machines equipped with internal combustion engines make continuous efforts to reduce the negative impact of their products on the natural environment. It is required both by the legislative guidelines defined in given areas of the world, as well as by the increasing ecological awareness of the human population [2]. The main disadvantages of modern internal combustion engines include noise emission and emission of toxic compounds into the atmosphere It should be noted, that in relation to combustion engines produced even ten years ago, the emission factors decreased by at least several dozen percent. Since 2019, guidelines for the monitoring of exhaust emissions of gaseous components during real operation begin to apply for selected NRMM subgroups, but the final limits are still not fully defined
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