Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Reexamination Certificate
2005-04-12
2005-04-12
Scherbel, David A. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
C137S554000, C251S129040
Reexamination Certificate
active
06877679
ABSTRACT:
A conventional fuel injection system meters fuel by varying the time for which the injector is open. This is an empirical rather than fundamental method of metering the fuel. The amount of fuel delivered for a given injector opening time will depend on the pressure difference across the injector orifice and the exact dimensions of the injector orifice. Both these parameters are subject to variation. An injector (1) which comprises a plunger (2), a solenoid coil (3), and a conical return spring (11) which is driving a primary high pressure pump assembly consisting of a primary piston (4) within a primary cylinder (5) together with primary inlet valve (8) and primary outlet valve (7). The plunger (2) is also driving a secondary low pressure pump assembly consisting of a secondary piston (22), secondary cylinder (23), secondary inlet valve (24) and secondary outlet valve (25). The solenoid coil (3) is under the control of an electronic monitor unit (10) which is connected to the solenoid coil (3) via two connecting wires (19). The injector is mounted in and is delivering fuel into an inlet manifold (20). By interrogating various sensors around the engine the electronic monitor unit (10) calculates the amount of fuel it wishes to deliver. From a simple volumetric calculation the electronic monitor unit (10) calculates how far the piston (4) must be moved to deliver this amount of fuel.
REFERENCES:
patent: 4327695 (1982-05-01), Schechter
patent: 4718386 (1988-01-01), Gieles
patent: 5076499 (1991-12-01), Cranford
patent: 5433244 (1995-07-01), Sule
patent: 5595215 (1997-01-01), Wallace et al.
patent: 5687050 (1997-11-01), Bartsch
patent: 5738071 (1998-04-01), Smith et al.
patent: 5895844 (1999-04-01), Krueger
patent: 2052794 (1981-01-01), None
Christensen O'Connor Johnson & Kindness PLLC
Gorman Darren
Scherbel David A.
LandOfFree
Fuel injector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuel injector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel injector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3384871