Control method for an overpressure valve in a common-rail fuel supply system
Abstract
Control method for an overpressure valve (12) in a common-rail fuel supply system (1), the method including the phases of: delivering fuel under pressure, via a high-pressure pump (6), to a common rail (5) equipped with the overpressure valve (12) that is set to discharge the fuel present in the common rail (5) into a discharge line (11) when the fuel pressure inside the common rail (5) exceeds a safety value (p safety ); piloting, during a diagnostic test, the high-pressure pump (6) to increase the fuel pressure inside the common rail (5) beyond the safety value (p safety ) in order to trigger operation of the overpressure valve (12); determining, during the diagnostic test, the flow (m HP ) of the high-pressure pump (6) and/or the fuel pressure inside the common rail (5); and comparing the flow (m HP ) of the high-pressure pump (6) and/or the fuel pressure inside the common rail (5) during the diagnostic test with respective threshold values (m test and p test ).
Classe Tecnologica
F - Mechanical engineering, lighting, heating, weapons, blasting
Patent Office
United States Patent and Trademark Office
Numero Deposito
US7779819
Anno Deposito
2008
Anno Concessione
2010
Inventori Pugliesi
- De Cesare Matteo
Tutti gli inventori
- Gabriele Serra
- Matteo De Cesare
Titolari pugliesi
- Non ci sono titolari pugliesi
Tutti i titolari
- Magneti Marelli S.p.A.
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