Patent ID: 6669453
Filing Date: 2003-12-30
Classification: F04B

Abstract:
A pump assembly for pressurizing fluid for an internal combustion engine, the assembly comprising a body having a first, lower portion, a second, upper portion and a circumferential flange extending around the body between the first and second portions with the first portion below the flange; a crank chamber in the first portion of the body; a crankshaft mounted in the body, the crankshaft including a crank in the crank chamber and a drive end extending outwardly of the first portion of the body; a rotary drive member mounted on the drive end of the crankshaft for rotating the crankshaft in the body; a piston pump in the body, the pump including a first piston bore extending into the crank chamber, a first piston in the first bore, an operative connection between the crank and the piston for moving the piston back and forth in the bore in response to rotation of the crankshaft; an inlet port in the first portion of the body; a low pressure inlet passage in the body extending from the inlet port to the piston pump; an outlet port in the first portion of the body; a high-pressure outlet passage in the body extending from the pump to the outlet port; a solenoid controlled valve mounted on the second portion of the body; the high pressure outlet passage including a branch extending to the valve; a first passage in the body extending from the valve and into the first portion of the body; the valve including a solenoid operable to open and close the valve in response to electrical signals from an engine control module to control flow fluid from the outlet passage to the first passage; wherein the assembly may be mounted on an internal combustion engine in a pump chamber with the flange engaging a chamber cover; the rotary drive member, the inlet port, and the outlet port located inside the chamber and the valve located outside the chamber.