Gasoline fuel supply system
AssigneeDenso Corporation
InventorNorihiro Hayashi
Life of this patent
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Abstract
A gasoline fuel supply system includes a feed pump part, an inline pump part, and a high-pressure pump part. The feed pump part includes a non-positive displacement electric pump, and pumps a gasoline fuel from a fuel tank and discharges at a feed pressure. The inline pump part includes a non-positive displacement mechanical pump, and pressurizes the gasoline fuel discharged from the feed pump part and discharges at a middle pressure. The high-pressure pump part includes a positive displacement mechanical pump, and pressurizes the gasoline fuel discharged from the inline pump part and discharges at a supply pressure to a fuel injection valve.
Claims6
A gasoline fuel supply system that supplies a gasoline fuel to a fuel injection valve by pumping from a fuel tank so as to be directly injected by the fuel injection valve into a cylinder of an internal-combustion engine, the gasoline fuel supply system comprising:
- a feed pump part including a non-positive displacement electric pump which operates in response to receiving electric power, and pumping the gasoline fuel from the fuel tank and discharging at a feed pressure;
- an inline pump part including a non-positive displacement mechanical pump which operates in response to receiving an output of the internal-combustion engine, and pressurizing the gasoline fuel discharged from the feed pump part and discharging at a middle pressure;
- and
- a high-pressure pump part including a positive displacement mechanical pump which operates in response to receiving the output of the internal-combustion engine, and pressurizing the gasoline fuel discharged from the inline pump part and discharging at a supply pressure to the fuel injection valve.
Dependencies are inferred from the claim text.