Abstract
The use of gasoline without additives causes deposits formation on injectors, intake manifold, valves and combustion chamber. The problem of deposits formation could be solved by utilization of additives.
In this paper, the results of the project titled The possibilities of application BASF additives - Keropur® will be presented. BASF has provided Keropur®, one of the modern additive packages, consisting of detergent Kerocom PIBA, corrosion inhibitor, demulsifier and carrier fluid, Oil Refinery Panèevo supplied the gasoline and the tests were made by Zastava Automobiles - Automotive Institute and Faculty of Mechanical Engineering - Fuels & Combustion Lab.
The investigations with Yugoslav gasoline were carried according the modified CEC F-04-A-87 method. The motor 128A6.064 (DMB production) was chosen for the investigation as similar to motor OPEL Kadett 12 S used in original CEC test. The tests were performed with leaded and unleaded gasoline, with and without additive Keropur ® . The deposits were evaluated through the weight measuring and Opel Kadett valve deposit merit rating scale. Additionally, the evaluation of the combustion chamber residues, the deposits accumulated in the intake ports and manifold and spark plug appearance were recorded.
The obtained results have shown great reduction in deposits formation on the intake valve according to both evaluation criteria: weight measuring and Opel Kadett valve deposit merit rating scale.