Abstarct: Air and human exposure to poor quality air are the most critical environmental threats to public health worldwide. Weather is one of the great killers of our age and causes many economic losses. Air pollution is a major control target in the global community due to the potential risk it poses to human health and the environment, and is also one of the greatest environmental challenges facing the 21st century. The most common air pollutant is particulate matter, which has been associated with an increased risk of exacerbations and reduced symptoms in people with lung disease, a complication of the disease. Suspended particles are a combination of liquid droplets and very small particles that are composed of organic and inorganic compounds. The formation of suspended particles includes sources and factors that are the most important factors in the production of internal combustion engines, which are the main ones in these particles. For this purpose, in the tests using the Pride four-stroke engine, three revolutions of 800, 2000 and 2500 rpm have been performed. The results of the tests show that with the increase of the engine speed, the suspended particles increase. It can also be seen that with the increase of the engine speed, the temperature increases and the maximum amount of consumption is in the state where the fuel is better.