Internal-combustion engines – Charge forming device – Auxiliary air or gas used to inject fuel
Patent
1996-09-19
1998-02-03
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Auxiliary air or gas used to inject fuel
F02M 2300
Patent
active
057133379
ABSTRACT:
An apparatus for intermittently atomizing and injecting fuel with the assistance of air. The apparatus includes a cylinder (1) having a cylinder head (4) with a valve seat (5) and at a flow passage, a piston (2) driven within the cylinder by a rotating crankshaft (3), an injection valve (6) with a valve head (14) and a spring element (7) urging the valve head (14) into engagement with the valve seat (5) to close the flow passage. The injection valve generally includes an actuating surface (12) that cooperates with the piston (2) to mechanically open the valve (6) when the piston reaches the end of its compression stroke. As a result, the present invention delays the start of valve opening until the piston maximizes the atomizing pressure within the cylinder (1) thereby advantageously maintaining small fluid drop sizes and high velocity of the spray jet. Additionally an annular gap (16) around the valve head (14) directs the spray jet centrally into the combustion chamber (10).
REFERENCES:
patent: 5131375 (1992-07-01), Sakamoto
patent: 5146904 (1992-09-01), Olson et al.
patent: 5150692 (1992-09-01), Trombley et al.
patent: 5156133 (1992-10-01), Sugimoto et al.
patent: 5239970 (1993-08-01), Kurihara
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