FUEL ECONOMY

Karan UppalI - Section, Roll Number 68

Computer Science & Engineering

RV College of Engineering, Bangalore

F U EL EC O N O M Y  I S A F O R M O F   TH ER M A L EFF IC IEN C Y.

IT IS TH E EF F IC IEN C Y O F A P R O C ESS TH AT C O N V ERTS C H EM I C A L PO TEN TIA L EN ER G Y C O N TA IN ED IN A C A R R IER   F U EL  IN TO  K IN ETIC EN ER G Y   O R   W O R K .

DEFINITION

In the context of transport, fuel economy is the energy efficiency of a particular vehicle, is given as a ratio of distance travelled per unit of fuel consumed.

• Units of fuel per fixed distance: Amount of fuel used per unit distance; for example, litres per 100 kilometres (L/100 km). Lower the value, more economical the vehicle is.

• Units of distance per fixed fuel unit: Distance travelled per unit volume of fuel used; for example, kilometres per litre (km/L) or miles per gallon (MPG). Higher the value, more economical the fuel is.

• Converting from MPG or to L/100 km (or vice versa) involves the use of the reciprocal (inverse) function, which is not distributive.

• The formula for converting to miles per gallon from L/100 km is, where ‘x’ is value of L/100 km.

APPLICATION OF MATHEMATICS IN FUEL ECONOMY

• Fleet fuel economy is calculated using a harmonic mean, not a simple arithmetic mean - the reciprocal of the average of the reciprocal values.

Example: For a fleet composed of four different kinds of vehicle A, B, C and D, produced in numbers nA, nB, nC and nD, with fuel economies fA, fB, fC and fD, the Average Fuel Economy would be:

APPLICATION OF MATHEMATICS IN FUEL ECONOMY

• Illustration (Harmonic Mean):A fleet of 4 vehicles getting 10, 20, 30, and 40 mpg has a

Average Fuel Economy of 19.2 mpg: = 19.2

• Illustration (Algebric Mean): A fleet of 4 vehicles getting 10, 20, 30, and 40 mpg has a

Mean Fuel Economy of 25: = 25

Calculation Source: www.nhtsa.gov/fuel-economy

APPLICATION OF MATHEMATICS IN FUEL ECONOMY

• Fuel Doctor FD-47: Plugs into the vehicle's cigarette lighter and displays several LEDs. It is claimed to increase vehicle fuel economy by up to 25% through ‘power conditioning of the vehicle's electrical systems’.

APPLICATION OF ELECTRONICS ENGINEERING IN FUEL ECONOMY

An analysis of the circuit shows that it:• Will turn on the green normal LED when the voltage is above 11.5

volts.• Will turn on the red low LED when the voltage is below 11.5 volts.

APPLICATION OF ELECTRONICS ENGINEERING IN FUEL ECONOMY

We can maximize the efficiency of fuel, by altering the vehicle as follows:

• Reducing Engine internal losses using- a downsized engine - low friction lubricants - low viscosity engine oils that require less energy to

circulate

• Improving engine running conditions by- using coolant additive- increasing the number of gearbox ratios in manual

gearboxes - reducing the volume of water-based cooling systems

APPLICATION OF MECHANICAL ENGINEERING IN FUEL ECONOMY

APPLICATION OF MECHANICAL ENGINEERING IN FUEL ECONOMY

The amount of fuel energy that a vehicle consumes per unit of distance depends upon:

• The forces of friction within the mechanical system that delivers engine output to the wheels.

• The forces of friction in the wheels and between the road and the wheels.

• External forces that resist motion (e.g., wind, rain).

• Fuel consumed while the engine is on standby and not powering the wheels.

APPLICATION OF COMPUTER ENGINEERING IN FUEL ECONOMY

ScanGauge II

ScanGauge D

ScanGauge E

ScanGauge and MPGuino started out as an impressive use of the Arduino platform to monitor a vehicle's fuel consumption or MPG (Miles per Gallon).

APPLICATION OF COMPUTER ENGINEERING IN FUEL ECONOMY

ScanGauge and MPGuino provide you with real-time information about your vehicle’s fuel economy through an intuitive graphic display:

Real Time Fuel Economy Feedback Graph: The graph represents your current average fuel economy over a period of time and is separated into 3 sections; (A) above your average, (B) at your average, and (C) below your current average.

Goal based Fuel Economy Feedback Graph: It is possible to set the Real-time Fuel Economy Graphic Feedback to display results based on a fuel efficiency goal.

REFERENCES[1] “Fuel Consumption Ratings” Government of Canada. January 2011: http://www.oee.nrcan.gc.ca/transportation/tools/fuelratings/ratings-search.cfm?attr=8 [2] “Average Fuel Economy Overview” NHTSA: http://www.nhtsa.dot.gov/cars/rules/cafe/overview.htm [3] Australian Fuel Consumption Label: http://www.environment.gov.au/settlements/transport/fuelguide/label.html  [4] Mike Millikin (2014-09-28) "ICCT: World fuel economy figures in Europe reaches ~38%; call to implement WLTP ASAP": http://www.environment.gov.au/settlements/transport/fuelguide/label.html  [5] “Fuel Doctor FD-47” Patent Application: http://www.compendiumarcana.com/fuel_doctor_fd47/US20100264726.pdf [6] Fuel Saving Techniques: http://courses.washington.edu/me341/oct22v2.htm [7] “ScanGauge MPG Gauge” Improve Your Fuel Economy: http://www.scangauge.com/ [8] “MPGuino” Fuel Monitor: http://ecomodder.com/wiki/index.php/MPGuino

THANK YOU!

Q&A