Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1998-11-25
2000-03-07
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
F02M 6900, F02D 4132
Patent
active
060326522
ABSTRACT:
An air-assisted type injector injects a fuel into an intake port toward the face part of an intake valve, and its injection port has multiple holes to atomize the injected fuel into a predetermined fuel particle diameter (e.g., SMD=about 50 microns). An air feed pump supplies pressurized air to the injector to atomize the gas particle size of about 10 microns in a low/medium speed and low/medium load region where the face of the intake valve is at low temperatures. In a high speed or high load region where the face temperature is high, the air assistance by the air feed pump is stopped. When the fuel atomization by the air assistance is stopped, the gas particle diameter of the injected fuel is about 50 microns, but the fuel atomization is promoted by the valve face at a high temperature. Thus, the fuel flowing into the cylinder is atomized to a diameter as small as that at the time when the air assistance is executed.
REFERENCES:
patent: 5027778 (1991-07-01), Nogi
patent: 5220899 (1993-06-01), Ikebe et al.
patent: 5495839 (1996-03-01), Samejima et al.
patent: 5666920 (1997-09-01), Ito et al.
Isomura Sigenori
Nozawa Masaei
Denso Corporation
Vo Hieu T.
Wolfe Willis R.
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