Patent ID: 6220217
Filing Date: 2001-04-24
Classification: F02B,F02M,Y02T

Abstract:
A fuel supply system for a direct injected internal combustion engine, said fuel supply system including a fuel storage tank, a first pressure pump for drawing fuel from said tank and elevating its pressure to a first level, a second higher pressure pump a first conduit in communication with said first pump and adapted to receive the fuel from said first pump and to deliver fuel from said first pump to said second pump to elevate its pressure to a higher pressure for delivery through a second conduit to a direct cylinder fuel injector, and a bypass system including a bypass conduit extending from said first conduit to said second conduit a first check valve in said second conduit for permitting flow from only said second pump to said fuel injector, said bypass conduit intersecting said second conduit downstream of said first check valve and a second check valve in said bypass conduit for permitting flow through said bypass conduit only from said first conduit to said second conduit said bypass system bypassing the fuel delivered by said first pump past said second pump so that the pressure systems of both pumps can be tested from a single location and constituting the sole communication for fuel from said fuel storage tank to said fuel injector.