Abstract
Abstract Camless Engines offer many advantages over poppet valve systems. However, they suffer from air/hydraulic leakages and piston-valve interactions. In addressing the situation, the stepping valve rotates perpendicularly to the piston motion with no interactions. In this case, the valve events will be flexible enough to allow engine cranking without the mechanical starter. For this study, a 3-phase, 12-coil Stator rated at 3Amp 12V DC and a Stepping Valve were used. To avoid friction against its seat, the Stepping Valve is lifted up by 1mm in 2mS. Then it steps to a new Valve State Position in 2mS before gently landing back on its seat in 4mS. The Valve Event Algorithm has been designed, simulated and successfully programmed onto an Altera Programmable Device using Max Plus II Design Environment. The overall aim of this study is to have the three components required for ignition: fuel, spark and air, entirely controlled in software to maintain engine efficiency for the entire RPM range.
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