Power system control

Claim 1

A POWER SYSTEM FOR DRIVING A LOAD, SAID POWER SYSTEM COMPRISING: (A) A PRIME MOVER POWERED BY A MOTIVE FLUID, (B) A CONTINUOUSLY VARIABLE DRIVE RATIO TRANSMISSION INTERCONNECTING SAID PRIME MOVER AND SAID LOAD, (C) SAID TRANSMISSION HAVING A VARIABLE POSITIVE DISPLACEMENT BALL PISTON PUMP AND MOTOR, (D) A VARIABLE RACE FOR CONTROLLING THE STROKE OF SAID BALL PISTON PUMP, (E) MEANS FOR ADJUSTING THE RACE STROKE TO VARY THE DRIVE RATIO OF SAID TRANSMISSION, (F) A MOTIVE FLUID CONTROL FOR CONTROLLING THE MOTIVE FLUID INPUT TO SAID PRIME MOVER, (G) MEANS TO GENERATE A SIGNAL INDICATING A SPEED AND POWER OUTPUT REQUIRED OF THE PRIME MOVER AND TO CONTROL THE MOTIVE FLUID INPUT SUCH THAT THE INPUT RATE IS THE MINIMUM POSSIBLE FOR THE REQIURED SPEED AND POWER OUTPUT, (H) MEANS TO GENERATE A SIGNAL INDICATING THE ACTUAL SPEED OF THE PRIME MOVER, (I) MEANS TO COMPARE THE REQUIRED PRIME MOVER SPEED SIGNAL AND THE ACTUAL PRIME MOVER SPEED SIGNAL AND TO GENERATE A SPEED ERROR SIGNAL, (J) AND MEANS RESPONSIVE TO THE SPEED ERROR SIGNAL TO ADJUST CONTINUOUSLY THE MEANS FOR VARYING THE DRIVE RATIO OF THE CONTINUOUSLY VARIABLE DRIVE RATIO TRANSMISSION UNTIL THE ACTUAL PRIME MOVER SPEED IS EQUAL TO THE REQUIRED PRIME MOVER SPEED, (K) WHEREBY THE PRIME MOVER OPERATES AT A CONDITION OF OPTIMUM MOTIVE FLUID CONSUMPTION.