Improving performance parameters of combustion strongenginestrong for.pdfVIP

Res. Agr. Eng. Vol. 60, 2014, No. 3: 83–91 Improving performance parameters of combustion engine for racing purposes T. Polonec, I. Janoško Department of Transport and Handling, Technical Faculty, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Abstract Polonec T., Janoško I., 2014. Improving performance parameters of combustion engine for racing purposes. Res. Agr. Eng., 60: 83–91. Mechanical parts of stock engine have a performance reserve which could be utilized when the engine is used under the race conditions. Especially normal turbocharged engines have their performance parameters designed to drive in traffic, where a good flexibility, reliability, fuel consumption and a long service life is required. It is possible to utilize the whole power of the engine, when changing or modifying some of its external parts and achieve better performance parameters without modifying or changing internal engine components. Performed changes must be realized thought- fully and on the admittable level, so the engine and other drive train components would not be damaged. In our study we design several changes of external parts of engine which have a significant impact on the improvement of engine performance parameters. Their contribution has been verified in practice by an engine dynamometer. Keywords: engine; performance parameters; turbocharger; roller dynamometer It is generally known that the engine perfor- – decrease of intake air temperature (behind tur- mance is substantially dependent on the amount of bocharger), air (oxygen), which enters to the combustion cham- – reduction of mechanical and airflow losses, ber. Turbocharged engines are using turbochargers – optimization of intake and exhaust manifolds, or compressors to increase the amount of induced – opti