Fuel supply control device
AssigneeIHI Corporation
InventorsNaoki Seki, Yasuhiko Yamamoto, Akihiro Shimamura
Life of this patent
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Abstract
A fuel supply control device is provided in which a parallel flow path of an orifice and a pressurizing valve is used as a complex pressurizing valve for a fuel supply amount, and which controls a fuel supply pump on the basis of a pressure difference before and after the complex pressurizing valve that has been detected by a pressure difference meter. When the rotational speed of the fuel supply pump is below a predetermined threshold value, the fuel supply pump is controlled on the basis of a first fuel measurement amount, and the fuel supply pump is controlled on the basis of a second fuel measurement amount.
Claims4
A fuel supply control device for being disposed in a fuel supply device including an orifice, a pressurizing valve, a differential pressure meter, and a fuel supply pump and for, by using a parallel flow path of the orifice and the pressurizing valve is used as a complex pressurizing valve for a fuel supply amount and, controlling the fuel supply pump is controlled on the basis of a differential pressure before and after the complex pressurizing valve detected by the differential pressure meter, the fuel supply control device comprising:
- at least one memory storing instructions, and at least one processor configured to execute the instructions, wherein the at least one processor is configured to:
- control the fuel supply pump the fuel supply pump is configured to be controlled on the basis of a first fuel measurement amount obtained from the differential pressure before and after the complex pressurizing valve and a mutual relationship between the differential pressure before and after the complex pressurizing valve and a fuel flow rate when a rotational speed of the fuel supply pump is below a predetermined threshold value,
- control the fuel supply pump on the basis of a second fuel measurement amount obtained from a pump volume efficiency in consideration of an internal leak area of the fuel supply pump and a theoretical pump discharge volume when the rotational speed exceeds the predetermined threshold value,
- calculate the first fuel measurement amount and the second fuel measurement amount,
- generate a switching signal by comparing the rotational speed of the fuel supply pump with the predetermined threshold value,
- selectively select the first fuel measurement amount or the second fuel measurement amount on the basis of the switching signal,
- calculate a deviation between the selected first or second fuel measurement amount and a control target value;
- and
- generate an operation amount of the fuel supply pump by performing a predetermined control calculation process on the deviation.
Dependencies are inferred from the claim text.