Direct injection system internal combustion engine controlling apparatus
AssigneeHitachi, Ltd.
InventorsTakeshi Atago, Shimada Kousaku
Life of this patent
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Abstract
In a direct injection internal combustion engine, a stratification combustion condition, a homogeneous combustion condition and an intermediate combustion condition which is intermediate the stratification combustion and the homogeneous combustion conditions are controlled selectively according to an operation condition of at least one selected from a combustion condition, an output condition of the engine and an acceleration condition of a vehicle. Without defeating an intended low fuel consumption operation, the engine operates to obtain a reduction of harmful exhaust gas. As a result, by assuring the low fuel consumption operation, an improvement in combustion stability and smoke reduction can both be realized.
Claims14
In a direct injection internal combustion engine controlling apparatus having means for controlling a fuel injection amount and injection timing of fuel which is supplied to the engine, compromising
- a combustion controlling means for controlling the fuel to a homogenous combustion area for injecting the fuel in a respective cylinder during an intake stroke of the engine, a stratification combustion area for injecting the fuel in the respective cylinder during a compression stroke of the engine, and an intermediate combustion area between said homogenous combustion area and said startification combustion area for injecting dividingly the fuel at a predetermined rate during the respective intake stroke and the repective compression stroke;
- means for discriminating an operation condition in accordance with at least one condition selected from a combustion condition of the engine, an output condition of the engine and a vehicle acceleration condition;
- and
- means for selecting at least one combustion selected form homogenous combustion, stratification combustion and intermediate combustion in accordance with a result of said operation-condition-discrimination-means.
A direct injection internal combustion engine controlling method for controlling a fuel injection amount and an injection timing of fuel supplied to a direct injection internal combustion engine, comprising the steps of
- controlling the fuel to a homogenous combustion area for injecting the fuel in a respective cylinder during an intake stroke of the engine, a stratification combustion area for injecting the fuel in the respective cylinder during a compression stroke of the engine, and an intermediate combustion area between said homogenous combustion area and said stratification combustion area for dividingly injecting the fuel at a predetermined rate during the respective intake stroke and the respective compression stroke;
- discriminating an operation condition in accordance with at least one condition selected from a combustion condition of the engine, an output condition of the engine and a vehicle acceleration condition of a vehicle;
- and
- selecting at least one combustion selected from homogenous combustion, stratification combustion and intermediate combustion in accordance with a result of said operation condition discrimination step.
Dependencies are inferred from the claim text.