Search Results

The Australian concept car "aXcessaustralia II" is a serial hybrid car of the so-called "New Generation Hybrids." Its internal combustion engine drives an electrical power generator. The wheels are driven by the electrical traction motor only, which receives its energy from a combination of batteries, capacitors and the electrical power generator. In a drivetrain, which consists of a combustion engine, a generator, a traction motor, two different systems for electrical energy storage and the necessary electronics to apply the most fuel efficient power strategy, all components require an extremely high degree of weight optimization to avoid offsetting the fuel savings achieved with the system by an increased overall vehicle weight. They also need to be extremely efficient in themselves.

The application of a Scotch Yoke crank mechanism to a reciprocating internal combustion engine reduces the engine's size and weight and, with the sinusoidal piston motion it provides, it changes the combustion parameters and simplifies the requirements for perfect balancing of the engine. This paper makes a theoretical comparison between conventional and Scotch Yoke engines with dimensional similarity of individual components where possible such as bore and stroke, and justifiable differences appropriate to each engine design such as cylinder bore off-set, piston height, connecting rod length etc. Included are variations related to differences in piston motion (true sinusoidal versus conventional) such as exhaust emissions and balancing requirements.