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On the road fuel economy

"On The Road" Fuel Economy

Overview

Driving behaviour as well as other non-technical factors plays a role in determining a car's fuel consumption and CO2 emissions. Everybody drives differently under different traffic and weather condition (summer, winter). You may spend most of your time driving on motorways or you may drive mainly on country roads. Some people drive faster and others more slowly. That’s why ‘real world’ driving can never be compared to the official fuel consumption figures. So, we enlisted the help of Ford customers around Europe to provide their own driving data to monitor the ‘on the road’ fuel economy of our customer’s. Using this data, we have developed a model to estimate the likely range of fuel consumption that the majority of our customers will experience. This information can be found in a table showing the fuel consumption range for our most popular models.

Methodology Process

The published On Road Fuel Economy (ORFE) figure is derived from tested and simulated fuel consumption data, correlated and adjusted by Consumer data considering typical standard deviations. 

ORFE - Consumer database
2. Correlation formula
3. Drive cycle tests
4. Fuel consumption rnage
  1. Starting point is a Consumer database containing European customer feedback information for their vehicle’s individual fuel consumption. Within this database a large variety of fuel consumption influencing factors under real world driving conditions is being covered, such as driving styles (less dynamic, high dynamic), various driving profiles (city, highway, and country roads so as short trips and long-distance trips), AC usage and electrical consumers, different payloads as well as changing environmental conditions (especially temperature) throughout the year.
  2. The Consumer information is used to develop a correlation formula and standard deviations applicable for all new Ford models expressing the “average customer reported fuel consumption” and typical variations of it expressed by a range.
  3. For a new model, the projected customer fuel consumption is determined using various drive cycles tests with different average speeds taking into account representative real world driving conditions (e.g. payload, tires, and aerodynamics). Applying the correlation formula and standard deviations to the results the On Road Fuel Economy Range for a typical Consumer is calculated.
  4. The provided range for fuel consumption is meant to cover typical driving situations and other fuel consumption influencing factors (driving style, trip lengths, AC usage, electrical loads as well as ambient temperatures). Nevertheless, there are up to approx. 20% of customers where the provided figure for maximum fuel consumption will still be exceeded.

Fuel Economy Data - Cars

Ford Fiesta

 

Ford EcoSport

 

All-New Ford Focus

 

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