公开(公告)号：US11867141B1

公开(公告)日：2024-01-09

申请号：US18119395

申请日：2023-03-09

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Roberto Gothardo Krenus

IPC: F02D19/06 ,  F02M53/06 ,  F02M31/125

CPC classification number: F02M53/06 ,  F02D19/0605 ,  F02D19/0655 ,  F02M31/125 ,  F02D2200/0612

Abstract: A method of detecting a percentage of ethanol in fuel used by an engine is provided. The method includes obtaining the heater temperature at a first time t1 at which a slope of the heater temperature as a function of time reaches a predetermined threshold value indicative of fuel boiling; obtaining the heater temperature at a subsequent time t2 at which the slope of the heater temperature approaches a value of the slope prior to the time t1 and which is greater than the predetermined threshold value; and determining the percentage of ethanol in the fuel as a function of the first time t1 and a calculated temperature difference ΔT between the heater temperature at time t2 and the heater temperature at the first time t1. A fuel delivery system that detects a percentage of ethanol in fuel by the method, and a flexible fuel vehicle including the fuel delivery system, are also provided.