Turbo-Discharging for improved engine torque and fuel economy

This paper presents experimental data and supporting simulation for Turbo-Discharging applied to internal combustion engines. It shows that significant improvements to engine breathing (~ 7% torque increase) are possible with potential for significant fuel economy benefits across a large proportion of the engine operating range. Significantly reduced in-cylinder trapped residual mass can extend the knock limit of gasoline engines giving further fuel economy benefit from, for example, spark advance. The technology is applicable to a wide range of engine architectures, aspiration, fuels and combustion systems and is particularly well suited to engines with high load demand or passenger car gasoline engines.