Ethanol Compensation Presented by: Davis hill.

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Presentation transcript:

Ethanol Compensation Presented by: Davis hill

Outline What is it? Why do we Care? Measuring Ethanol Content Flex Fuel Circuit Wiring Homework Questions

What is it? What does the US Produce? Corn Facts: Freedom Corn The US is the leading grower of corn in the world (obviously) Corn was first found in Mexico In 2013 the US produced 13 BILLION bushels of corn 8% is consumed by the world population 40% goes into Biofuels (ETHANOL!!)

Why do we care? Ethanol Pros CSC Rules Burns Cleaner (fewer aldehydes, CO, and NO x ) Higher Energy Content (~105 Octane) CSC Rules Requires all sleds to be “Flex Fuel Capable” 0-85% ethanol content Exact amount unknown

Measuring Ethanol Content How the sensor works Sends an AC Voltage Measures Capacitance of Fuel Outputs a oscillatory voltage response (sine wave) Frequency of output is proportional to ethanol % Sine wave converted to steady voltage via the Flex Fuel Circuit

Flex Fuel circuit Circuit inputs Continental sensor used to measure volume fractions of ethanol In-house designed circuit (2012 Senior Design) Lovingly referred to as the orange box Unchanged since Senior Design Project

Flex Fuel circuit Circuit calibration Step 1: Step 2: Step 3: Orange Box Step 1: Know the voltage range for ethanol Step 2: Calibrate Extremes (E00 & E85) Step 3: Linearly Interpolate injection quantity

Wiring Stock CSC modified Air Temp Sensor ECU Flex Fuel Sensor Block diagram Stock Air Temp Sensor ECU CSC modified Flex Fuel Sensor Custom Circuit ECU

Wiring General Wiring diagram

Homework

Questions?