Fuel circuit for an apparatus, associated apparatus and method
AssigneeVolvo Truck Corporation
InventorsFrançois GIROUD, Yann Ardouin, Mickael Jondeau, Hellal Benzaoui
Life of this patent
Estimating the term…
Abstract
This fuel circuit has a pumping device with a low-pressure stage and a high-pressure stage. The fuel circuit is configured to supply, at high-pressure, fuel collected from a fuel tank to injectors of an engine. A low-pressure circuit and a high-pressure circuit are included. A fuel filter, is arranged between an outlet of the low-pressure stage and an intake of the high-pressure stage. V fist pressure sensor is arranged upstream from the fuel filter, and a second pressure sensor is arranged between the fuel filter and the intake of the high-pressure stage.
Claims15
A fuel circuit, comprising:
- a pumping device comprising a low-pressure stage and a high-pressure stage, the fuel circuit being configured to supply, at high-pressure, fuel collected from a fuel tank to injectors of an engine,
- a low-pressure circuit and a high-pressure circuit,
- a fuel filter, which is arranged between an outlet of the low-pressure stage and an intake of the high-pressure stage,
- a fist pressure sensor arranged upstream from the fuel filter, and
- a second pressure sensor arranged between the fuel filter and the intake of the high-pressure stage.
A method to evaluate clogging of a fuel filter of a fuel circuit for an apparatus, the method comprising:
- pumping fuel, with a pumping device of the fuel circuit, the pumping device comprising a low-pressure stage and a high-pressure stage, the fuel circuit comprising a low-pressure circuit with the fuel filter and a high-pressure circuit, the fuel filter being arranged between an outlet of the low-pressure stage and an intake of the high-pressure stage,
- while pumping fuel, measuring a fuel pressure downstream of the fuel filter, with a pressure sensor arranged between the fuel filter and the intake of the high-pressure stage, with a control unit, comparing the measured fuel pressure with expected values of the fuel pressure, the expected values being preferably stored in a memory of the control unit.
Dependencies are inferred from the claim text.