Patent ID: 7931009
Filing Date: 2011-04-26
Classification: F02M

Abstract:
1. A fuel injector for an internal combustion engine comprising: an injector body in which a fuel flow path is formed which extends from a fuel inlet to a spray hole, said injector body being adapted to be mounted in a cylinder head of an internal combustion engine; an actuator disposed within said injector body, said actuator working to open the spray hole to spray fuel, as supplied to the fuel flow path through the fuel inlet, to the internal combustion engine; and a fuel pressure sensor working to measure a pressure of the fuel in said injector body and produce an electric signal indicative thereof, said fuel pressure sensor being installed in a first portion of said injector body which is located remote from the cylinder head of the internal combustion engine, on an opposite side of a second portion of said injector body with respect to the spray hole, whereby said second portion of said injector body is disposed between said fuel pressure sensor and said spray hole, wherein said second portion of said injector comprises: a fuel inlet port of said injector body, on which a mechanical pressure is exerted when a high-pressure pipe is joined to the fuel inlet port to supply fuel to the fuel flow path; a surface of said injector body on which a mechanical pressure is exerted by a clamp when the clamp is placed in abutment therewith to mount said injector body in a mount hole formed in the cylinder head; and a fuel outlet port of said injector body on which a mechanical pressure is exerted when a drain pipe is joined to the fuel outlet port to drain an excess of the fuel from said injector body.