Thursday, January 26, 2017

Ford's 1-liter I-3 engine examined

The Ford booth at the 2017 Silicon Valley Auto Show at the San Jose McEnery Convention Center included a display of the major components of the Ford “Fox”  Ecoboost™ turbocharged, direct-injection one-liter (61 cubic inch) inline three-cylinder engine.

In the nineteen sixties Saab cars used two-stroke three cylinder engines fitted with three carburetors, but more recently, Opel, Volkswagen, Subaru, and Toyota have all built and sold cars with inline three-cylinder engines.  

The Ford “Fox” Ecoboost™ engine produces 123 horsepower and installed as a $995 option in the Ford Fiesta SE delivers 43 miles per gallon (MPG) fuel economy when paired with five-speed manual transmission. The iron cylinder block appears almost small enough to fit onto an 8-1/2 x 11 inch sheet of paper.

The double overhead camshaft cylinder head is cast aluminum with a variable camshaft system and instead of timing belt the engine uses a belt that runs in an oil bath. The engine has been voted “International Engine of the Year” in its class as awarded by UKIP Media for the last five years.
courtesy Ford Motor Company

So how does Ford eliminate those engine destroying vibrations? Other manufacturers use balance shafts, but Ford engineers developed an eccentric weighted flywheel. The “Fox” engine weighs 215 pounds ready to install.    
All photos by the author except as noted

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