CONTINUOUSLY VARIABLE TRANSMISSION FOR A HYDRAULIC MECHANISM IN HYBRID CARS WITH RECOVERED POWER-SPLIT ENERGY

摘要

A continuously variable transmission for a hydraulic mechanism in hybrid cars with recovered power-split energy mainly comprises a multi-function planet differential gear train pump and a hydraulic variable pump (motor) of through shaft. The planet differential gear train pump provides a hydraulic constant pump, and a planet gear system thereof provides a speed-adjustable function as well as a speed-collecting function. Thereby, the planet differential gear train pump of the present invention is used to substitute the conventional planet gear system and the hydraulic constant pump in the continuously variable transmission. A power input shaft or a power output shaft of the hydraulic variable pump and the planet differential gear train pump are coaxially connected for uniaxially arranging the continuously variable transmission with the hydraulic mechanism power-split energy. Whereby, the transmission of the present invention is able to not only provide the property of a continuously variable transmission but also transform the inertia kinetic energy of the car into hydraulic potential energy in the high pressure reservoir while the speed of the car is reduced and the car is to be stopped. When the car is started and accelerated, the hydraulic potential energy is transformed into mechanical energy via the planet differential gear train pump and the hydraulic variable pump in a motoring status so as to trigger the car.