Method and apparatus for supplying fuel to internal combustion engines
AssigneeDiesel Kiki Co., Ltd.
InventorsKyoichi Fujimori, Masaki Sano
Life of this patent
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Abstract
For supplying fuel from a fuel tank to an internal combustion engine by a fuel supply pump, a fuel delivery pressure of the fuel supply pump is regulated by a pressure regulating valve so as to maintain the difference between the fuel delivery pressure of the pump and an inner pressure of an intake manifold of the engine at a prescribed constant value, and the delivery volume of fuel from the pump is controlled in response to the fuel delivery pressure so as to minimize the amount of surplus fuel produced by the pressure regulating operation of the pressure regulating valve.
Claims12
A fuel supplying system in which fuel in a fuel supply means is pressurized by means of a fuel supply pump and is supplied to an internal combustion engine;
- said system comprising:
- a pressure regulating member for regulating the pressure of pressurized fuel derived from said fuel supply pump by returning surplus fuel to said fuel supply means so as to maintain the difference between an output fuel pressure of said fuel supply pump and an inner pressure of an intake manifold of said engine at a prescribed constant value;
- a fuel injecting member for injecting into said engine the fuel regulated in pressure by said pressure regulating member;
- a sensing means for sensing the pressure of fuel delivered by said fuel supply pump, said sensing means being incorporated in said fuel supply pump;
- and,
- a control means incorporated in said fuel supply pump and responsive to said sensing means for controlling the amount of fuel delivered by said fuel supply pump in accordance with the pressure of fuel delivered from said fuel supply pump so that the amount of surplus fuel produced by the pressure regulating operation of said pressure regulating member and returned to the fuel supply means is effectively reduced.
A system as claimed in claim 20, wherein said fuel supply pump comprises a casing having an input port for receiving fuel from said fuel supply means and an output port for providing pressurized fuel to said fuel regulating member, and wherein said sensing means is incorporated in said casing to detect the pressure of said pressurized fuel at the output port of said casing.
Dependencies are inferred from the claim text.