Knocking control system and method for internal combustion engine using multiple fuels
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTomihisa Oda
Life of this patent
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Abstract
High octane fuel and low octane fuel are supplied into the combustion chamber of an engine from high-octane fuel tank and low octane fuel tank via a high octane fuel injector and a low octane fuel injector. During a knocking control, if the quantity of high and low octane fuels in the respective tanks has been unbalanced, the supply ratio between high octane fuel and low octane fuel is changed 1 to control a knocking occurring in the engine without changing the ignition timing.
Claims9
A knocking control system for an internal combustion engine, comprising:
- a fuel supply mechanism capable of supplying the internal combustion engine with a first fuel and a second fuel with a different octane rating from the first fuel, and
- a controller performing a knocking control to control a knocking occurring in the internal combustion engine, the controller being adapted to:
- obtain a requested ignition timing during the knocking control;
- obtain a remaining quantity of the first fuel and the second fuel;
- and
- select and change one of an ignition timing and a fuel supply ratio between the first and second fuels, the selection being made based on the requested ignition timing and the remaining quantity of the first and second fuels.
A method for performing a knocking control to control a knocking occurring in an internal combustion engine running on a first fuel and a second fuel with a different octane rating from the first fuel, the method comprising:
- obtaining a requested ignition timing during the knocking control;
- obtaining a remaining quantity of the first fuel and the second fuel;
- and
- selecting and changing one of an ignition timing and a fuel supply ratio between the first and second fuels, the selection being made based on the requested ignition timing and the remaining quantity of the first and second fuels.
A knocking control system for an internal combustion engine, comprising:
- fuel supply means for supplying the internal combustion engine with a first fuel and a second fuel with a different octane rating from the first fuel, and
- controlling means for performing a knocking control to control a knocking occurring in the internal combustion engine, wherein
- the control means;
- obtains a requested ignition timing during the knocking control;
- obtains a remaining quantity of the first fuel and the second fuel;
- and
- selects and changes one of an ignition timing and a fuel supply ratio between the first and second fuels, the selection being made based on the requested ignition timing and the remaining quantity of the first and second fuels.
Dependencies are inferred from the claim text.