Abstract: A variable-angle vortex generator (10) installed in an intake pipe (100) of an internal combustion engine includes a shaft seat (1), a plurality of vanes (2) and a position restoring mechanism (3). Each vane (2) is arranged radially with an interval apart from each other and pivotally coupled to the shaft seat (1) and each vane (2) has a movable end (21) at an edge of the vane (2). The position restoring mechanism (3) is installed at the shaft seat (1) and includes a synchronizing element (31) for connecting each movable end (21). Each vane (2) is pushed by a fluid to produce a swing movement and let the fluid in the intake pipe (100) form a smooth vortex.

Abstract: A variable-angle vortex generator (10) installed in an intake pipe (100) of an internal combustion engine includes a shaft seat (1), a plurality of vanes (2) and a position restoring mechanism (3). Each vane (2) is arranged radially with an interval apart from each other and pivotally coupled to the shaft seat (1) and each vane (2) has a movable end (21) at an edge of the vane (2). The position restoring mechanism (3) is installed at the shaft seat (1) and includes a synchronizing element (31) for connecting each movable end (21). Each vane (2) is pushed by a fluid to produce a swing movement and let the fluid in the intake pipe (100) form a smooth vortex.

Abstract: A smart vehicle rescue battery apparatus includes a battery unit, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit, a control unit and a voltage polarity detection unit. The first switch unit and the fourth switch unit are turned on, when the connection between the first switch unit and the third switch unit is judged to be a positive pole and when the connection between the second switch unit and the fourth switch unit is judged to be a negative pole. The second switch unit and the third switch unit are turned on when the connection between the first switch unit and the third switch unit is judged to be the negative pole and when the connection between the second switch unit and the fourth switch unit is judged to be the positive pole.