Patent ID: 8308450
Filing Date: 2012-11-13
Classification: F02M,F04B,Y10T

Abstract:
1. A high pressure fuel pump with parallel cooling fuel flow, comprising: a fuel pump barrel including a bore having first and second ends; a fuel supply; a first fuel path including a supply passage fluidically connected to said fuel supply, an annular cooling ring formed in an outer surface of said barrel facing away from said bore to receive fuel from said supply passage, and an exit passage to direct fuel from said annular cooling ring; and a second fuel path including an annular drain groove formed in said fuel pump barrel and encircling said bore, said second fuel path further including a parallel fuel passage formed in said barrel and fluidically connected to said first fuel path and said annular drain groove to deliver fuel from said first fuel path to said annular drain groove, said second fuel path further including a drain passage formed in said barrel and fluidically connected to said annular drain groove to direct fuel flow from said annular drain groove, said second fuel path forming a fuel flow parallel to fuel flow in said first fuel path.