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US 11,719,154 B2Granted
Methods and systems for multi-fuel engine startup
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 engine startup. In one example, a method for an engine includes injecting a fuel mixture with a proportion of a first fuel to a second fuel to decrease carbon emissions, in response to detection of or request for the engine to start. The proportion of the first fuel to the second fuel in the injected fuel mixture is decreased in response to engine speed reaching an idling speed. The first fuel may be a non-hydrocarbon-based fuel and the second fuel may be a hydrocarbon-based fuel.
Claims5
An engine system for a vehicle, comprising:
- an engine configured to combust more than one type of fuel;
- an alternator/generator mechanically coupled to the engine;
- a first fuel storage reservoir coupled to the engine and configured to deliver a first fuel to the engine for combustion;
- a second fuel storage reservoir coupled to the engine and configured to deliver a second fuel to the engine for combustion;
- and
- a controller configured with executable instructions stored on non-transitory memory that, when executed, cause the controller to;
- crank the engine using the alternator/generator in response to detection of a cold start request and initiate fuel injection via fuel injectors with a first ratio of the first fuel to the second fuel when an engine speed reaches an engine speed threshold;
- adjust the fuel injection to a second ratio of the first fuel to the second fuel when the engine speed reaches an idling speed, the second ratio lower than the first ratio;
- and
- adjust the fuel injection to a third ratio of the first fuel to the second fuel when operation of the engine at part-load is requested, the third ratio higher than the second ratio and lower than the first ratio.
7 more elements
Dependencies are inferred from the claim text.