Fuel injection device of direct injection engine
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United States of America Patent
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May 24, 2016
Grant Date -
Jan 2, 2014
app pub date -
Jun 7, 2013
filing date -
Jun 29, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A fuel injection device of a direct injection engine is provided. The device includes an engine body, a fuel injection valve, and a controller for controlling a fuel injection by the fuel injection valve. The fuel injection valve has a nozzle hole, a valve body for opening and closing the nozzle hole, and first and solenoid coils for stroking the valve body by first and second stroke amounts, respectively. The controller performs the fuel injection by the first solenoid coil in an intake stroke period within an engine operating range with an engine load below a predetermined load. The controller performs the fuel injection with a fuel pressure of 40 MPa or above by the second solenoid coil in a period between a compression stroke late stage and an expansion stroke early stage within a low-engine-speed range with an engine speed below a predetermined speed within a high-engine-load range.
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