Pulse Width Modulation energy recovery braking and speed hydraulic continuously variable transmission

The present invention discloses a regenerative braking and speed of the pulse width modulation type hydraulic continuously variable transmission, two sets of parallel lines branched in the hydraulic passage, the first branch line and a second branch line, a first branch line, a second branch pipe path is provided with a first, a second logic valve, a first two-way hydraulic motor, both ends of a second two-way hydraulic motor are respectively connected to a first check valve, the second check valve pipeline, arranged in parallel; a first branch line, a second branch pipeline are provided a first, a second poppet valve, respectively, by a first, a third speed switch valve controlling the first opening of the second poppet valve, a first, a second bevel a valve connected to the tank. The transmission of the present invention, having a valve-controlled system speed fast dynamic response characteristics of the low speed state is more stable, simple structure, low cost; significantly improved work efficiency, small temperature system, simple structure, low cost; high-speed quick response valve good, strong anti-pollution, easy to realize the advantages of digital control.