Speed changer of hydraulic hybrid passenger car

The utility model provides a speed changer of a hydraulic hybrid passenger car, which comprises an automobile speed changer, a hydraulic pump input shaft, an intermediate shaft, a power output shaft and an energy storage/release switching synchronizer, wherein the hydraulic pump input shaft is engaged with an energy storage gear through a pinion wheel on the intermediate shaft and is engaged with an energy release gear through a gear wheel on the intermediate shaft, the energy storage/release switching synchronizer is integrated with the power output shaft by means of splined coupling, and an energy storage/release switching cylinder assembly is arranged on the side surface of an auxiliary gear housing. The speed changer can output both the hydraulic power and the engine hybrid power to drive the passenger car and alternatively output the hydraulic power or the engine hybrid power alone to drive the passenger car, so that the passenger car can store energy without changing the gear. Besides, the energy storage/release switching synchronizer is adopted to ensure that the passenger car has rapid energy storage speed, high efficiency and powerful energy release. The speed changer can work alone to drive the passenger car, adopts the two-stage gear transmission with compact structure and reasonable velocity ratio, meets both the energy storage requirement and the energy release requirement, and adopts the externally-arranged energy storage/release switching cylinder to facilitate the replacement of the wearing parts.