Direct actuated valve control hydraulic pump and motor

Abstract

A control device for controlling a displacement pump or motor, comprising a variable mechanical device, comprising at least two masks, wherein the at least two masks are phased relative to each other and a shaft, and are configured to create a desired cam profile. A cam follower is operatively connected to at least one of an intake valve an output valve of a displacement pump or motor.

1 . A method for achieving flow diverting and flow limiting variable displacement control of a displacement pump or motor, comprising utilizing a variable mechanical device to provide a control signal for an intake and output valve operatively connected to said displacement pump or motor. 
     
     
         2 . The method of  claim 1 , wherein the variable mechanical device comprises a rotating cam connected to a rotating shaft and a cam follower operatively connected to at least one of said intake and output valve. 
     
     
         3 . The method of  claim 1 , wherein the cam comprises at least two masks, wherein the two masks are phased relative to each other and a shaft, and are configured to create a desired cam profile for controlling at least one of said intake and output valve. 
     
     
         4 . A control device for controlling a displacement pump or motor, comprising:
 a variable mechanical device, comprising at least two rotating cam masks,   wherein the at least two masks are phased relative to each other and a shaft, and are configured to create a desired cam profile; and   a cam follower operatively connected to at least one of an intake valve and an output valve of a displacement pump or motor.   
     
     
         5 . The variable mechanical device of  claim 3 , wherein the at least two masks are half masks.