Ice

presents the results of the emission tests of a combat vehicle (an armored modular vehicle ROSOMAK - fitted with a diesel engine) under real operating conditions. Under the said conditions it is possible to obtain information on the actual vehicle fuel consumption and emissions. The tests were performed on a military training area using the standard operational mode and the overboost mode (boosting the engine performance). For the measurements of the toxic compounds a portable SEMTECH DS analyzer by SENSORS was used. The analyzer allowed a measurement of toxic compounds at the same time measuring the mass flow rate of the exhaust gases. The analysis of the PM emission was performed based on the measurement of the mass of the particles (AVL 483 MSS - Micro Soot Sensor - by AVL) and size of the particulate matter (analyzer 3090 EEPS - Engine Exhaust Particle Sizer™ Spectrometer - by TSI Incorporated). The influence of standard operation and the operation in the overboost mode on the matrices of the time share of engine operation, gaseous emissions, mass and number of PM along with the fuel consumption have been compared as determined by the engine speed-load coordinates (or vehicle speed-acceleration) characterizing the dynamic engine or vehicle properties. The measurements of CO, HC, NOx, PM and fuel consumption have also been carried out under real operating conditions. For the measurement of the engine operating conditions and the fuel consumption a diagnostic vehicle system was used; the obtained data constituted a basis for the development of the engine (or vehicle) operation matrices for different aspects of the conducted investigations. Based on the analysis of the engine operations in the combat mode a three phase test was developed that represents the emission level of the combat vehicle. The test phase share coefficients were determined. The differences in the emission tests in the three phase test and during combat operation are as follows: a) For the gaseous components: approximately 5-10% b) For the PM: approximately 20-37%.