US 4,359,025 AGranted

Continuous flow fuel injector for internal combustion engines

OwnerStefan Zeliszkewyczinventor

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Abstract

An injector arrangement is disclosed in which liquid fuel in variable quantities is received within an injector chamber in a continuous flow. The admitted fuel is stored and intermixed with hot high-pressure burnt gases retained from previous combustion period for timed injection during or near the end of the compression stroke. During the intermixing period in the injector chamber preheated liquid fuel is partly or fully vaporized. Cam operated linkage is set up to hold over the injector in an open position until hot high-pressure burnt gases of combustion can re-enter the injector chamber for the next fuel charge preparation. A variable delivery liquid fuel pump provides for fuel quantity regulation according to torque output requirements. A tiny capillary passage at the entrance to the injector chamber provides the necessary flow restriction to obtain continuous fuel flow. Disclosed are two injectors of slightly different construction eliminating the need for return springs.

Claims9

Dependent claims

A fuel delivery and injection system for a piston and cylinder type internal combustion engine having a combustion chamber and means for supplying air thereto for compression by said piston during a compression stroke thereof prior to a power stroke produced by combustion of a fuel charge in said air compressed by said piston comprising:

an injector having an injector chamber formed therein, and a passage enabling communication of said injector chamber with said engine combustion chamber;
valve means controllably establishing communication between said injector chamber and said combustion chamber via said passage;
fuel supply means for delivering atomized liquid fuel into said injection chamber;
drive means for opening and closing said valve means in timed relationship to said piston movements, said means opening said valve means during the completion of the compression stroke and maintaining said valve means open after combustion is initiated for a time period of a duration to enable a volume of the combustion gases to enter and fill said injection chamber;
said drive means thereafter closing said valve means to retain said volume of combustion gases in said injection chamber for the next cycle, whereby said fuel is mixed with said combustion gases in said injection chamber, and enabled to be dispersed into said combustion chamber upon opening of said valve means.

2 more elements

Dependencies are inferred from the claim text.