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US 11,598,271 B1Granted
Methods and systems for a multi-pressure fuel injection system
AssigneeTransportation IP Holdings, LLC
InventorsAdam Edgar Klingbeil, Thomas Michael Lavertu, Eric Dillen
Life of this patent
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Abstract
Various methods and systems are provided for a method for a multi-pressure fueling system. In one example, the multi-pressure fueling system includes providing a first fuel delivery pressure enabling high pressure direct injection of a fuel at a first injector and a second fuel delivery pressure insufficient for high pressure direct injection, at a second injector, based on engine operation.
Claims17
A method for an engine, comprising:
- storing a fuel in a storage tank at a pressure enabling high pressure direct injection of the fuel via a first fuel injector without boosting pressure via a pump;
- providing a first fuel delivery pressure enabling high pressure direct injection of the fuel via the first fuel injector without boosting pressure via the pump until the pressure in the storage tank falls below a threshold;
- and
- providing a second fuel delivery pressure, insufficient for high pressure direct injection, via a second fuel injector, after the pressure in the storage tank falls below the threshold even when the engine load is high.
1 more element
A method for an engine, comprising:
- providing a first fuel delivery pressure enabling high pressure direct injection of a fuel via a first fuel injector and a second fuel delivery pressure, insufficient for high pressure direct injection, via a second fuel injector, based on engine operation, wherein providing the first and second fuel delivery pressures includes drawing the fuel sequentially from a plurality of fuel storage tanks for high pressure direct injection, the plurality of fuel storage tanks storing the fuel at the first fuel delivery pressure, and wherein drawing the fuel sequentially from the plurality of fuel storage tanks includes flowing the fuel from a first fuel storage tank of the plurality of fuel storage tanks storing the fuel at the first fuel delivery pressure until a pressure of the first fuel storage tank decreases to the second fuel delivery pressure and then drawing the fuel from a second fuel storage tank of the plurality of fuel storage tanks storing the fuel at the first fuel delivery pressure for high pressure direct injection, the method further comprising flowing the fuel from the first fuel storage tank, after the pressure of the first fuel storage tank decreases to the second fuel delivery pressure, to the engine for low pressure direct injection when engine load is moderate and for port injection when the engine load is high.
A multi-pressure fueling system for a vehicle, comprising:
- a first storage tank of a hydrogen reservoir configured to store hydrogen above a minimum threshold pressure for high pressure direct injection;
- an engine receiving the hydrogen from the first storage tank at one or more injectors without boosting pressure via a high pressure pump;
- and
- a mechanism for maintaining a delivery pressure of the hydrogen to the engine at a pressure above the minimum threshold pressure for high pressure direct injection, including redistributing hydrogen storage pressure among a plurality of hydrogen storage tanks forming the hydrogen reservoir.
1 more element
Dependencies are inferred from the claim text.