System and method for direct injection fuel pump control
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United States of America Patent
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Aug 2, 2022
Grant Date -
Oct 7, 2021
app pub date -
Apr 3, 2020
filing date -
Apr 3, 2020
priority date (Note) -
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Abstract
Methods and systems are provided for vehicle direct injection fuel pump control. In one example, a method may include reducing a flow speed of fuel from a cam-driven direct injection fuel pump for at least half of a total duration of an output stroke of the fuel pump. A cam driving the fuel pump may reduce the flow speed at a first rate during a main portion of the output stroke, and the cam may reduce the flow speed at a second rate during an end ramp portion of the output stroke.
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