Abstract: The present invention relates to a connector assembly and a plug connector and a core unit thereof. The core unit, with its front end being an inserted end, includes a front casing and a rear casing oriented and assembled in front and rear directions. The rear casing is provided with a guide mounting structure for disposing an optical cable inside the rear casing. The front casing is provided with a plug body at a front end thereof. A limiting structure is arranged between the front casing and the rear casing to limit the positions to which the front and rear casings are separated in the front and rear directions, ensuring that after the plug body is plugged in place, a protective casing and a receptacle casing are locked and fit to each other continuously.

Abstract: A crank and connecting rod mechanism which can realize a Miller cycle and its control method, wherein an interior of a crankshaft is provided with a drive oil channel and a lock-up oil channel. A connecting rod neck of the crankshaft is arranged with an eccentric connecting rod bearing. In a crankshaft balance weight, a drive gear meshing with an outer meshing gear ring of the eccentric connecting rod bearing through an idle gear is installed. A planetary gear is installed in a drive gear hollow shaft. A lockpin is designed for the drive gear hollow shaft so as to lock with the crankshaft balance weight or with a planetary gear shaft.

Abstract: A crank and connecting rod mechanism which can realize Miller cycle and its control method, wherein an interior of a crankshaft is provided with a drive oil channel and a lock-up oil channel. A connecting rod neck of the crankshaft is arranged with an eccentric connecting rod bearing. In a crankshaft balance weight, a drive gear meshing with an outer meshing gear ring of the eccentric connecting rod bearing through an idle gear is installed. A planetary gear is installed in a drive gear hollow shaft. A lockpin is designed for the drive gear hollow shaft so as to lock with the crankshaft balance weight or with a planetary gear shaft.

Abstract: The present invention relates to a connector assembly and a plug connector and a core unit thereof. The core unit, with its front end being an inserted end, includes a front casing and a rear casing oriented and assembled in front and rear directions. The rear casing is provided with a guide mounting structure for disposing an optical cable inside the rear casing. The front casing is provided with a plug body at a front end thereof. A limiting structure is arranged between the front casing and the rear casing to limit the positions to which the front and rear casings are separated in the front and rear directions, ensuring that after the plug body is plugged in place, a protective casing and a receptacle casing are locked and fit to each other continuously.