Patent ID: 6019087
Filing Date: 2000-02-01
Classification: F02M

Abstract:
A supplemental regulator for use in combination with a primary regulator to regulate fuel pressure to a fuel injected, supercharged, internal combustion engine of the type having an intake manifold, fuel injectors, fuel rails to the injectors, the primary regulator functioning to control a supply of fuel to the injectors, the primary regulator having a fuel chamber, a fuel inlet to the chamber, a fuel outlet from the chamber, a diaphragm, a spring acting on the diaphragm to bias it toward the fuel chamber, a spring chamber housing the spring, a bypass valve in the fuel outlet to pass fuel from the fuel chamber to a fuel tank, the supplemental regulator comprising:a) a body having a first and a second end, and a chamber at the first end;b) a diaphragm at the first end dividing the first end chamber into a manifold pressure sensing chamber and a second chamber;c) manifold pressure port means into the interior of the body to communicate the manifold chamber with the intake manifold of the engine of the engine to sense manifold pressure;d) a push rod axially disposed in the body;e) means to attach the second end of the supplemental regulator to the primary regulator; andf) means to couple the push rod to the diaphragm of the primary regulator, fuel pressure in the fuel chamber opposing manifold pressure in the manifold pressure chamber of the supplemental regulator,whereby, when a vacuum exists in the manifold chamber, the supplemental regulator diaphragm moves and translates the push rod to uncouple it from the primary regulator diaphragm and permit fuel pressure in the fuel chamber to unseat the bypass valve.