Fuel injection system for an internal-combustion engine

Details Fuel injection system for an internal-combustion engine Fuel injection system for an internal-combustion engine

1994-10-26

1996-06-25

Solis, Erick R.

Internal-combustion engines

Water and hydrocarbon

123447, 239 96, F02B 4702

Patent

active

055290248

ABSTRACT:
In a fuel injection system for an internal-combustion engine which includes a dual-fluid nozzle which is supplied with fuel by a high-pressure pump and with water by a feed pump providing a substantially lower pressure than the high-pressure pump and which has disposed in a nozzle body a nozzle needle which is spring biased into a closing position where one end of the needle is seated on a valve seat, a fuel supply passage extends to an annular space around the valve needle and a branch passage leads to a control chamber formed at the other end of the valve needle and includes a solenoid valve for controlling the application of pressurized fluid to, and the release thereof from, the other end of the nozzle needle, an additional fluid line extends from the feed pump to the annular space and includes a check valve for permitting flow of additional fluid only toward the annular space and a pressure relief line in communication with the fuel supply passage via a control valve, and a control device is provided for operating the solenoid valve for timed relief of fluid pressure from the control chamber for unseating the nozzle needle and for operating the control valve to either supply fuel under pressure to the annular chamber or releasing pressure from the annular space so as to permit feeding of water into the annular space for subsequent injection, together with the fuel, from the dual-fluid nozzle.

REFERENCES:
patent: Re33270 (1990-07-01), Beck et al.
patent: 4417447 (1983-11-01), Thomas
patent: 5170751 (1992-12-01), Tosa et al.
patent: 5174247 (1992-12-01), Tosa et al.
patent: 5243932 (1993-09-01), Herrmann
patent: 5271370 (1993-12-01), Shimada et al.

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