| dc.description.abstract | Motorsports contributed greatly for the improvement of internal combustion engines
because they adopted the engine as their primary power unit. This work aims the
development of a high performance V8 engine for experimental vehicles and
motorsport championships, promoting the pleasure of driving a powerful car with a
remarkable sound, referring to Ferrari vehicles. The aim of this work is to develop a
high performance V8 engine from adaptations in four-cylinder engines available on the
market, to be marketed in motorsport championships and among engine enthusiasts.
For that, the first step was to select a suitable engine for the adaptation, considering
factors such as availability and cost of the components, ease of adaptation to the V
configuration, weight and power. After choosing which engine to use, reverse
engineering of this engine was made, measuring main geometric aspects to initiate the
adaptation to the V arrangement in CAD software. Besides, parameters such as valve
lifts and discharge coefficients were measured to perform 1-D thermodynamic
simulations to obtain performance curves. Additionally, dynamic simulations were
performed to evaluate the forces acting on the engine main bearings due to inertia and
combustion forces. The chosen engine was a sport bike one, by the fact that it is a
light, powerful engine and it has parts that help the adaptation to the V arrangement.
Reverse engineering of this engine was made and the necessary parameters to the
adaptation and the simulations were obtained. Furthermore, the simulated engine
performance curves were similar to commercial four-cylinder engines. Besides, with
the implementation of the dynamic simulation, it was noted that in comparison with the
model without counterweights, the one with the four-cylinder counterweights increased
the unbalance of the engine, not fulfilling its primary purpose of balancing the engine.
Taking back to the V8 engine adaptation, this process followed design decisions such
as the use of a flat-plane crankshaft and a dry sump system. The result of this
adaptation was an engine block of 625 mm of length, 570 mm of width, 445 mm of
height and a mass of 85 kg. Thermodynamic simulation of this engine indicated a peak
torque of 282,6 Nm at 8.000 rpm and a peak power of 259,8 kW at 9.500 rpm, resulting
in a power-to-weight ratio of 4,09 hp/kg, comparing with V8 engines designed by
companies specialized in adapting commercial engines to high performance. | |
