The article contains results of the research on the assessment of the blue light retinal hazard by lighting devices used in the automotive with LED light sources. The study was subject to daytime running lights and work lamps available on the market for self-assembly in vehicles. The study method was presented using a matrix luminance meter and spectroradiometer. The necessary photometric and radiometric tests were carried out. Assessment of blue light hazard according to the PN-EN 62471: 2010 was made. Obtained results were referred to maximum luminous intensity, chromaticity coordinates and correlated colour temperature of tested devices.
The aim of the article is to analyze and evaluate the effect of dual-fuel feed on diesel and natural gas on Indicated Engine Ignition Indicators Perkins 1104D-E44TA. The actual indicator diagrams prepared during engine operation according to the external speed characteristic in the engine crankshaft speed range from 1000 to 2400 rpm were analyzed. On the basis of the average pressure courses in the cylinder, open indicator diagrams were made, which were then analyzed. The operating parameters of the tested motor were determined as: average indicated pressure pi, average effective pressure pe, indicated power Ni, indicated torque Mi, indicated efficiency ηi, mechanical efficiency ηm, and unit-specific fuel consumption gi.
