Apparatus and method for supplying fuel in internal combustion engine with variable valve lifter
AssigneeHitachi, Ltd.
InventorsYoshihiro Sukegawa, Toshiharu Nogi, Takanobu Ichihara, Hiroaki Saeki
Life of this patent
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Abstract
On supplying fuel in an internal combustion engine, a control signal for changing a degree of vaporization of the fuel passing the air intake valve in accordance with the opening degree of the air intake valve or a load of the internal combustion engine so that the fuel of liquid state is restrained from existing in the combustion chamber is generated, and subsequently a vaporizing speed of the supplied fuel is changed in accordance with the control signal to adjust the degree of vaporization of the fuel.
Claims33
An apparatus for supplying fuel in an internal combustion engine including a combustion chamber, an air intake valve for selectively allowing an air and the fuel through the air intake valve to flow into the combustion chamber, and a variable valve lifter for adjusting an opening degree of the air intake valve with respect to the combustion chamber at each of combustion cycles, comprising:
- a vaporizing speed adjuster for changing a vaporizing speed of the supplied fuel in accordance with a control signal to adjust a degree of vaporization of the fuel passing the air intake valve, and
- a controller for generating the control signal for changing the degree of vaporization of the fuel in accordance with at least one of the opening degree of the air intake valve and a load of the internal combustion engine to restrain the fuel of liquid state from existing in the combustion chamber.
A method for supplying fuel in an internal combustion engine including a combustion chamber, an air intake valve for selectively allowing an air and the fuel to flow through the air intake valve into the combustion chamber, and a variable valve lifter for adjusting an opening degree of the air intake valve with respect to the combustion chamber at each of combustion cycles, comprising the steps of:
- generating a control signal for changing a degree of vaporization of the fuel passing the air intake valve in accordance with one of the opening degree of the air intake valve and a load of the combustion engine to restrain the fuel of liquid state from existing in the combustion chamber, and
- changing a vaporizing speed of the supplied fuel in accordance with the control signal to adjust the degree of vaporization of the fuel.
An apparatus for supplying fuel in an internal combustion engine including a combustion chamber, and an air intake valve for selectively allowing an air and the fuel through the air intake valve to flow into the combustion chamber, comprising:
- a fuel supplier for supplying the fuel to an upstream side of the air intake valve,
- a vaporizing accelerator for at least one of vaporizing and atomizing in accordance with a control signal the fuel supplied by the fuel supplier, and
- a controller for generating the control signal for adjusting the at least one of vaporization and atomization of the fuel in accordance with a condition of the internal combustion engine.
A method for supplying fuel in an internal combustion engine including a combustion chamber, and an air intake valve for selectively allowing an air and the fuel to flow through the air intake valve into the combustion chamber, comprising the steps of:
- generating a control signal in such a manner that at least one of vaporization and atomization of the fuel increases in accordance with a decrease in load of the internal combustion engine, and
- changing the at least one of vaporization and atomization of the fuel in accordance with the control signal.
Dependencies are inferred from the claim text.