Pump system for an automotive engine

Abstract

A pump system, including a pressure pump having a primary drive shaft with a primary fluid moving element and a secondary drive shaft with a secondary fluid moving element that enmeshes with the primary fluid moving element; a first scavenge pump bank driven by the primary drive shaft and including at least one scavenge pump; and, a second scavenge pump bank driven by the secondary drive shaft and including at least one scavenge pump.

1 . A pump system, comprising: 
 a pressure pump having a primary drive shaft with a primary fluid moving element and a secondary drive shaft with a secondary fluid moving element that enmeshes with the primary fluid moving element;    a first scavenge pump bank driven by the primary drive shaft and including at least one scavenge pump; and,    a second scavenge pump bank driven by the secondary drive shaft and including at least one scavenge pump.    
   
   
       2 . The pump system of  claim 1  wherein the primary fluid moving element is a primary spur gear and the secondary fluid moving element is a secondary spur gear.  
   
   
       3 . The pump system of  claim 2  wherein the at least one scavenge pump of said first scavenge pump bank includes a primary drive rotor and a primary driven rotor.  
   
   
       4 . The pump system of  claim 3  wherein the at least one scavenge pump of said second scavenge pump bank includes a first, secondary drive rotor and a first, secondary driven rotor.