Sanjai Bashyam

Fuel Systems Specific Controls Intern

Summer 2016 Intern Presentation

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About Me University of Texas at Austin

– B.S. Electrical Engineering May 2017

Born in Cincinnati, Ohio and moved to Austin, Texas at 6 years old

Eagle Scout and 4 years of high school robotics in FIRST Robotics Competition

Founding member of UT FSAE – Electric

Co-creator of Innovation Station, a 3D Printing Vending Machine

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Terminology and Background

PIP (pre-injection processing)– 10 kHz pressure data accumulator PIP Tool – Engineering tool used to download pressure buffers for

analysis Ring Buffer – Circular buffer that holds 2000 most recent pressure

samples PIP Buffer – Sample of ring buffer prior to injection event

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Major Project

Problem– PIP Tool displays single

pump cutout events and injection events

– Unexplained offsets in pressure in between injection events

– Pressure data is only visible through PIP buffer during pump cutouts

Pressure variations

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Major Project

Objectives– Develop code and analysis script to view

continuous pressure data from ring buffer– Collect and compare pressure data between ring

buffer and PIP buffer to validate PIP buffer– Investigate 16-bit SDADC to potentially resolve

the issue

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Major Project – Data Collection

Actions– Studied PIP buffer C code to

identify relevant functions– Used portable bench to verify

functionality of data collection– Progressed to closed-loop bench

to collect real data– Forced to collect 200 elements at

a time because of software limitations imposed by Veristand

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Major Project – Data Analysis

Actions– Piece together each 200 element segment of ring buffer in

MatLAB– Plot and identify pump cutout events in ring buffer

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Major Project

Results– Software and Test team has new ability to view continuous

pressure data from ring buffer– Ring buffer’s validity will be confirmed

Future – Software and Test team may implement 16-bit SDADC

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Internship Highlights Engine Familiarization Ride and Drive White Rock Cummins Soccer Tournament

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Takeaways

Familiarity with many software and engineering tools Fuel system in diesel engines and fuel system specific controls Functionality of PPT, Software, Test, and Applied Controls teams in

FSSC Work process and workflow in FSSC Connection of control theory and coursework

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Acknowledgements

FSSC Team Tim Viola Nate Linen Rick Reisinger

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Questions?