Design of a liquid cooled cylinder block for an experimental internal combustion engine

U ovom radu prikazan je razvoj cilindarskog bloka hlađenog rashladnom tekućinom za eksperimentalni motor za istraživanje naprednih procesa izgaranja. Motor je značajno prerađeni jednocilindarski Hatz 1D81 koji se nalazi u Laboratoriju za motore i vozila na Fakultetu strojarstva i brodogradnje u Zagrebu. Cilindarski blok izveden je tako da su se postojeće komponente na motoru preradili ili nanovo izradile kako bi se integrirale u postojeću konstrukciju motora. Prije početka razvoja utvrđeni su zahtjevi koje je potrebno ispuniti, mjerenjem je određen dostupan prostor za nadogradnju i izračunat je potreban protok rashladne tekućine. Nakon toga je provedena funkcijska dekompozicija sustava. Svi podaci koji su korišteni za određivanje konstrukcijskih zahtjeva i za provedbu proračuna dani su od strane fakulteta ili su preuzeti iz navedene literature. S obzirom na funkcijsku strukturu sustava napravljeni su koncepti za izvedbu hlađenja cilindra motora, koji je samo dio spomenutog sustava. Ostale komponente sustava nisu detaljnije obrađene jer nisu tema ovog rada, nego su samo utvrđeni parametri koju su potrebni za izvedbu sustava. Za odabrani koncept je napravljena detaljnija konstrukcijska razrada i provedeni su analitički proračuni za bitnije dijelove konstrukcije. Nakon toga su napravljeni 3D modeli i tehnička dokumentacija.This paper presents the development of a coolant-cooled cylinder block for an experimental engine for research into advanced combustion processes. The engine is a significantly modified single-cylinder Hatz 1D81 which is located in the Laboratory for Engines and Vehicles at the Faculty of Mechanical Engineering and Naval Architecture in Zagreb. The cylinder block was designed so that the existing components on the engine were reworked or rebuilt to be integrated into the existing engine construction. Prior to the development start, the requirements that needed to be met were determined, measurements of the available space for upgrade were made and the required coolant flow was calculated. After that, the functional decomposition of the system was carried out. All the data used to determine the design requirements and to carry out the necessary calculations were provided by the faculty or were taken from the cited literature. Following the functional decomposition, concepts for the cylinder cooling design were created, which is only a part of the aforementioned system. Other components of the system are not processed in detail because they are not the subject of this paper, only the necessary parameters required for the performance of the system have been determined. For the chosen concept, further development was made and analytical calculations were carried out for the most important parts of the design. After that, 3D models and technical documentation were created