FORD ECOBOOST GETS TOP AWARD – TWICE
Ford has a family of EcoBoost petrol engines that currently range from the recently-introduced ed 1,000cc up to the 3,500cc V6.
EcoBoost engines all employ three principle technologies: High pressure direct fuel injection. Turbo charging. Variable camshaft timing.
EcoBoost engines benefit from the sum of a combination of these three principle technologies ies that have been utilised in conjunction with a suite uite of advanced high efficiency technologies.
Optimising and combining these principle technologies has created an efficiency synergy. . The resultant total efficiency benefit is greater than the sum of the applied technologies when n they are applied and measured individually.
What are some of the technologies and features utilised in the multi award winning Ford rd one litre EcoBoost engine?
In the New Zealand market, the one-litre Ford EcoBoost produces 90kw with 170Nm of torque (200Nm is available from 1,750rpm on short-term “over torque”).
Developed in the UK at the Dunton research facility the engine was given the internal code name of “Fox”. This compact three-cylinder engine has a capacity of 999cc, and has been developed to suit a wide range of vehicle and fuel quality applications.
Designed for high efficiency and low emissions, the “Fox” engine combines and utilises a number of cutting edge design features and technologies. With this suite of technologies the engine exceeds the requirements of the stringent Euro IV and Euro V emission standards, while CO2 emissions are less than 140g/km.
Other technologies supporting the drive for efficiency include a variable capacity oil pump. Controlled by the ECU, the oil pump lubricant outputs are varied to suit the requirements of the engine at any given moment.
For the camshaft and oil pump drive systems, an oil-immersed composite drive belt has been specified. Toothed belts are quieter and more efficient than the more common chain drive systems, and are specially designed for this application. These internal drive belts are intended to require no adjustment or replacement for the service life of the engine.
The engine cooling system is multi-stage, promoting rapid warmup, and allowing for efficient cooling when the engine is being worked hard. The water jacket volumes have been minimised, and this has the dual benefits of lowering coolant volume and further promoting rapid engine warm up.
The rigid cast iron cylinder block is sufficiently compact to sit within the confines of a sheet of A4 paper. The cylinder bores are 71.9mm in diameter with a stroke of 82mm. This combination gives a swept volume of 999cc.
Low friction coated pistons are connected by sintered conrods to the crankshaft, and are phased at an even 120 degrees. The designers have eschewed counterbalance shafts, and utilised a combination of out-of-balance harmonic damper and flywheel to deal with the three-cylinder vibrations.
A compression ratio of ten to one is high for a turbocharged application, and helps to create an environment of high off off-boost boost and engine low output efficiency.
With the “Fox” engine being conceived as a purely turbocharged application, the engineers had a number a number of freedoms to optimise the engine design for turbocharging. One of the most obvious features is the integration of the exhaust mani folding into the cylinder head casting. The result is greater turbocharger efficiency.
Direct injection of fuel into the combustion chambers has given the designers freedom to sweep the camshafts through a greater operating range than that permitted by a port injected engine.
Depending on operating load the fuel charge in the ch chamber can be varied. These broad operating param parameters have allowed the designers to create a power unit that has an extremely flat torque curve.
As a result of this technology an Ecoboost driver enjoys a power plant that performs the same as a much larger capacity engine while benefiting from the reduced fuel consumption and low emissions
of a smaller high efficiency engine.
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