Exhaust turbine throttled normally aspirated and turbocharger throttled turbocharged eco-boost type engines

摘要

Turbocharger (compressor 10/turbine 11) is braked by variable speed motor-generator (M-G) 8 controlled by a throttle position sensor (TPS) connected to a throttle control system (TCS) and engine control unit (ECU), and whose maximum speed is lim­ited by boost pressure sensor 15. M-G 8 outputs power to a variable speed M-G connected to the engine's crank, or to a battery-pack, upon throttle lift-off and when it is braked by a connected vehicle's braking system and accumulated power is subsequently discharged into the engine crank via the M-G conn­ected to the engine crank such that turbocharger engine throttling and the M-G 8 output increases or, less economically, boosts turbo pressure. When idling at low/sub-zero temperatures, bypass valve 13 is closed so that the engine becomes only ex­haust throttled, and at high ambient temperatures bypass valve 12 is closed so that compressor 10 adiabatically expansion refrigerates charge air, and intercooler bypass valve 23 opens when temperature sensors 21 & 22 sense such cooling. A similar Normally Aspirated system (fig.1) is also disclosed.