Diploma thesis is focused on conceptual design of Wankel rotary engine with performance between 30-60 kW. Performance of designed engine is determined to 35 kW and volume of one chamber amounts to 245,58 cm^3. In this thesis are step by step calculated geometrical properties of each design group which are afterwards put into 3D data. There is also solved cooling system of designed engine and design of geometrical and characteristic properties of parts of cooling system. Last but, not least there is solved placement of designed engine into frame of motorcycle. As suitable motorcycle has been chosen Honda CBR125R because it has very advantageous layout of frame.

This master's thesis describes a concept of Wankel type rotary engine for use in motorcycle with estimated power between 70 – 80 kW. Basic geometry parameters of rotor and ports are calculated. Power output is then checked on equivalent piston combustion engine with central crank mechanism in 1D simulation model. Rotor is designed for use with oil cooling system. Rotor is checked for safe design by static FEM analysis by applying maximum pressure found out of 1D simulation model.

The purpose of this thesis is to design the key parameters of the high-powered Walkel engine and to design a chamber side on the base of computed parameters so that it enables variable change of the intake and exhaust port geometry. Consequently, to carry out a flow simulation in both ports in designed chamber side in order to find out its flow character and geometry change reaction.

No description available.

Hybrid electric vehicles significantly reduce exhaust emissions and increase fuel economy. Power packs are the most fundamental components in a series powertrain configuration of a hybrid vehicle, which produce the necessary power to run the vehicle. The aim of this project is to design a compact power pack for a series hybrid vehicle, using virtual prototyping. The hybrid electric vehicle characteristics and configurations are analysed, followed by an explanation of the principles of induction machines. A new type of rotary induction machine with an outer rotor construction is designed to be coupled with the novel rotary internal combustion engine with rotating crankcase in order to form the compact power unit for the hybrid vehicle. The starting and generation performance of the designed machine is analysed by an electric machine simulator, called JMAG. ADVISOR software is studied and utilised to simulate the overall vehicle performance, employing different categories of power packs in the powertrain. Results show that the proposed compact power pack has the best performance in terms of fuel economy, emissions and battery charging compared to the existing power unit options. Over the city cycle, fuel economy is increased by up to 47 % with emission reduced by up to 36 % and over the highway cycle, fuel economy is increased by up to 69 % with emission reduced by up to 42 %.

A novel turbo rotary engine, operating according to a novel thermodynamic cycle, having an efficient compression phase, a limited temperature combustion phase followed by a long power extraction phase is designed. Thermodynamic and structural design and analysis of this novel engine is carried out and two prototypes are manufactured according to these analysis. High performance figures such as torque, power and low specific fuel consumption are calculated. Also the component tests of the manufactured prototypes are completed and their results are demonstrated.

[pt] No presente trabalho foi realizada a construção, montagem, revisão de projeto e avaliação experimental preliminar de um novo motor a combustão interna rotativo por ignição por centelha, que pode ser classificado como cat-and-mouse engine ou Twin-Rotor Piston Engine. Nesse motor, dois pares de deslocadores são montados sobre dois rotores, que giram em velocidade variável em dentro de uma câmara cilindrica, de forma a conferir uma variação da posição angular relativa entre deslocadores e, assim, formar quatro câmaras de volumes variáveis com o tempo, a fim de se realizar processos termodinâmicos equivalentes aos de um motor alternativo de quatro tempos. Esse motor destaca-se por possuir um sistema inovador que permite a mudança do movimento dos rotores e deslocadores, de forma a aumentar o volume deslocado e a taxa de compressão das câmaras onde ocorrem os processos termodinâmicos. Tal dispositivo permite alterar e otimizar a taxa de compressão para diferentes combustíveis. Os componentes do motor foram usinados de acordo com o projeto e o protótipo foi montado, revisado e ajustado, de forma a garantir a operacionalidade do equipamento. Posteriormente, o motor foi montado em uma bancada para se efetuar testes preliminares de acionamento externo, afim de se medir vazão volumétrica, potência fornecida e pressão de compressão no ponto morto superior em função da velocidade angular. A revisão bibliográfica do trabalho contém definições úteis na classificação de motores rotativos, além de discutir suas especificidades características. / [en] The present work describes the construction, assembly, project revision and preliminary experimental evaluation of an innovative rotary spark ignition internal combustion engine. First, a literature survey was carried out. Some useful definitions were found for rotary engines classification as well as some of their specific characteristics were discussed. The engine can be classified as cat-andmouse engine or Twin-Rotor Piston Engine. It is characterized by two pairs of displacers, assembled over two rotors, which rotate at a variable rotational speed within a cylindrical cavity. The driving mechanism is such that the relative distance between each pair of displacers varies continuously, thus providing the positive displacement effect. Therefore, the engine has four chambers, each one with its own time varying volume, so that thermodynamic processes, equivalent to those of a four-stroke reciprocating internal combustion engine, can take place. This engine presents a unique and innovative mechanism by which the compression ratio can be varied during operation, thus optimizing engine efficiency a for a given fuel. Engine components, designed in an effort previous to the present one, were fabricated according to the original project. A prototype was assembled, with all components following a routine of project revision, including measurements, uncertainties and adjustments. The engine was then placed on a test bench where preliminary non-firing external driving tests were carried out. They included: volumetric flow rate, driving (frictional) power and cylinder maximum pressure with displacer at the top dead center, all these parameters in terms of the primary shaft angular velocity.

Hybrid electric vehicles significantly reduce exhaust emissions and increase fuel economy. Power packs are the most fundamental components in a series powertrain configuration of a hybrid vehicle, which produce the necessary power to run the vehicle. The aim of this project is to design a compact power pack for a series hybrid vehicle, using virtual prototyping. The hybrid electric vehicle characteristics and configurations are analysed, followed by an explanation of the principles of induction machines. A new type of rotary induction machine with an outer rotor construction is designed to be coupled with the novel rotary internal combustion engine with rotating crankcase in order to form the compact power unit for the hybrid vehicle. The starting and generation performance of the designed machine is analysed by an electric machine simulator, called JMAG. ADVISOR software is studied and utilised to simulate the overall vehicle performance, employing different categories of power packs in the powertrain. Results show that the proposed compact power pack has the best performance in terms of fuel economy, emissions and battery charging compared to the existing power unit options. Over the city cycle, fuel economy is increased by up to 47 % with emission reduced by up to 36 % and over the highway cycle, fuel economy is increased by up to 69 % with emission reduced by up to 42 %.

No description available.

No description available.