Search Results

Growing global concern pertaining to climate change has meant that engine development has become more focused on engine emissions. A method of reducing the emissions of an internal combustion (IC) engine is to use smaller engines but recover power lost due to reduction in size by using a turbocharger or supercharger. Turbocharged vehicles are commonly used but they exhibit a weak point of poor performance under transient running conditions. The phenomenon, known as “Turbo-lag”, is most noticeable when a sudden load change is applied at lower engine speeds combined with rapid acceleration. The work presented analyses a novel method of improving the transient performance of turbocharged engines by injecting air into both the compressor of the turbocharger as well as inlet manifold of the engine-known as a two point air injection system.