TY - JOUR AU - Boretti, Albert PY - 2019/01/01 Y2 - 2024/03/29 TI - Half/Full Toroidal, Single/Double Roller, CVT Based Transmission for a Super-Turbo-Charger JF - Proceedings of Engineering and Technology Innovation JA - Proc. eng. technol. innov. VL - 11 IS - 0 SE - Articles DO - UR - https://ojs.imeti.org/index.php/PETI/article/view/3306 SP - 01-11 AB - <p>Turbocharging dramatically improves the power density of internal combustion engines. However, when the energy to turbine is either smaller or larger than what is needed by the compressor for a specific steady state or transient point, there are downfalls, such as turbo-lag, lack of boost, or wasted exhaust energy. Here we propose a super-turbo-charger, where the turbo-charger shaft is connected to the crankshaft through a continuously variable transmission (CVT) and gears’ pairs. Different designs are considered, half-toroidal and full-toroidal, single-roller or double-roller, single-CVT or two-CVT-in-series. Energy is drawn from the crankshaft or delivered to the crank-shaft to improve the steady or transient operation. In this paper, a six-cylinder, dual fuel diesel injection ignition engine is super-turbocharged. Engine performance simulations show the opportunity to achieve a nearly flat maximum torque all over the range of engine speeds and very high efficiencies from one fourth of the load up-wards.</p> ER -