The invention discloses an electrically-aided turbocharging
system, and belongs to the technical field of turbocharging. The invention aims at providing an optimized electrically-aided turbocharging
system adequately utilizing a
turbine body structure, and a control method thereof. One end of the electrically-aided
turbocharger disclosed by the invention is installed at an inlet end of an intake channel, and the other end of the electrically-aided
turbocharger is installed at an outlet end of an exhaust channel; the electrically-aided
turbocharger is composed of an aiding high-speed motor, a compressor, a turbocharger rotary shaft, a
turbine and a
waste gas bypass valve device; an
intercooler is installed on the intake channel; an intake
branch pipe is connected to a
tail end of the intake channel; an exhaust
branch pipe is connected to an inlet end of the exhaust channel; a
gasoline engine cylinder is directly connected between the intake
branch pipe and the exhaust branch pipe; the exhaust channel behind the exhaust branch pipe is divided into a first passage and a second passage which are connected in parallel; and
tail ends of the first passage and the second passage both communicate with an outlet pipeline. According to the electrically-aided turbocharging
system disclosed by the invention, the high-speed motor is combined with the turbocharger with the
waste gas bypass valve, thus the influence of
waste gas turbocharging for the performance of a
gasoline engine is furthest utilized.