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US 6,684,856 B2Granted
Fuel injection apparatus of engine
AssigneeMitsubishi Fuso Truck and Bus Corporation
InventorsKeiki Tanabe, Shinji Nakayama, Susumu Kohketsu
Life of this patent
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Abstract
By setting a switching timing of switching means that connects either one of a high pressure fuel source and a low pressure fuel source to an injector earlier than a point of time when an injector finishes a high pressure fuel injection, leak fuel or return fuel is reduced and an engine load is reduced and therefore mileage is improved.
Claims6
A fuel injection apparatus of an engine, the fuel injection apparatus comprising:
- a high pressure fuel source capable of supplying a high pressure fuel;
- a low pressure fuel source capable of supplying a fuel at a pressure lower than a fuel pressure of the high pressure fuel source;
- switching means;
- an injector connected to the high pressure fuel source and the low pressure fuel source via the switching means;
- and
- controlling means for controlling switching of the fuel sources by the switching means and operation of the injector;
- wherein the controlling means switches the fuel source for supplying the fuel to the injector from the high pressure fuel source to the low pressure fuel source a predetermined time period earlier than a point of time when the injector finishes an injection of the high pressure fuel.
4 more elements
Dependencies are inferred from the claim text.