Lubricity estimation device and fuel supply control device
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United States of America Patent
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Sep 1, 2020
Grant Date -
Nov 8, 2018
app pub date -
Oct 18, 2016
filing date -
Nov 12, 2015
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Abstract
A lubricity estimation device is applied to a fuel supply system that supplies a fuel to an internal combustion engine, and includes a mixing ratio estimation unit and a lubrication index calculation unit. The mixing ratio estimation unit estimates the mixing ratio of each of plural types of molecular structures included in the fuel. The lubrication index calculation unit calculates a lubrication index, representing the lubricity of an outer peripheral portion S1 of the piston of a fuel pump and an outer peripheral portion of the valve body of a fuel injection valve by the fuel, based on the mixing ratio estimated by the mixing ratio estimation unit.
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