Radial-piston pump for internal combustion engine fuel
AssigneeElasis Sistema Ricerca Fiat Nel Mezzogiorno
InventorsEgon Eisenbacher, Bernhard Arnold, Franz Pawellek
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Abstract
A pump having a number of radial cylinders each housing a sliding piston. Each cylinder is closed by a respective head, and comprises an intake valve and a delivery valve having respective seats inside a plate. The intake valve is located at the end of an intake channel having a first portion through the plate, a second portion formed between the head and the plate and perpendicular to the axis of the cylinder, and a third portion parallel to the cylinder axis. The delivery valve presents a truncated-cone-shaped seal communicating with the pumping chamber via a conduit also extending through the plate; and the two plungers are made of ceramic and guided by a respective retainer.
Claims16
A radial-piston pump, for internal combustion engine fuel, having a number of radial cylinders (11), each housing a radially-sliding piston (32);
- each said cylinder (11) being inserted inside a shell (10), and being closed by a respective head (51);
- a valve plate (50) with two flat parallel surfaces (52, 61) being located in a recess (54) in said head (51), secured by said cylinder (11);
- said plate (50) presenting a first seat (46) for an intake valve (40), and a second seat (47) for a delivery valve (41);
- and said first seat (46) being located at a first portion (60, 60') of an intake channel (57) extending through said two surfaces (52, 61);
- characterized by the fact that said intake channel (57) comprises a second portion (62) formed between said head (51) and said plate (50) and substantially perpendicular to the axis (12) of said cylinder (11).
Dependencies are inferred from the claim text.