Device and method for controlling an electromagnet controlling a metering valve of an internal combustion engine fuel injector
AssigneeC.R.F. Societa Consortile per Azioni
InventorsMario Ricco, Stefano Maria Borrione
Life of this patent
Estimating the term…
Abstract
The device has an electric circuit for generating a first electric current of such a predetermined value as to excite the electromagnet to open the metering valve, and a second electric current of a lower value such as to keep the electromagnet excited; and a timing device for controlling the electric circuit as a function of operating conditions of the engine. The timing device also controls the electric circuit in such a manner as to vary the duration of the first current as a function of the operating temperature of the engine.
Claims10
A device for controlling an electromagnet (7) controlling a metering valve of a fuel injector (6) of an internal combustion engine (5), and which comprises an electric circuit (11) for generating a first electric current (13) of such a predetermined value as to excite said electromagnet (7) to open said metering valve;
- said electric circuit (11) generating a second electric current (14) of a value lower than said predetermined value and such as to keep said electromagnet (7) so excited;
- timing means (12) being provided to control said electric circuit (11) as a function of operating conditions of said engine;
- and the device being characterized in that said timing means also control said electric circuit (11) in such a manner as to vary the duration (t3-t1) of said first current (13) as a function of the operating temperature of said engine (5).
A method of controlling an electromagnet controlling a metering valve of a fuel injector (6) of an internal combustion engine (5), wherein said electromagnet (7) is first excited by a first electric current (13) of such a predetermined value as to excite said electromagnet (7), and is subsequently kept excited by a second electric current (14) of a value lower than said predetermined value;
- the method being characterized by varying the duration (t3-t1) of said first current (13) as a function of the operating temperature of said engine (5).
Dependencies are inferred from the claim text.