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The Super-Efficient New 2010 Focus ECOnetic

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Khatir Soltani
The Ford Auto-Start-Stop system automatically shuts down the engine when the vehicle is at idle – at a traffic light, for example – and restarts the engine when the driver wants to move off, saving the fuel wasted while the vehicle is stationary.


The system can reduce fuel consumption and CO2 emissions by up to five per cent in mixed driving conditions. In an urban environment and in heavy traffic with frequent stops the savings could increase to as much as 10 per cent.

The advanced new Ford Auto-Start-Stop system has been carefully designed with customer comfort in mind, and to provide consistent starting and stopping performance that is smooth, quiet and seamless, requiring no changes in driver behaviour.

When the engine shuts down, the electronic control unit immediately prepares the engine's systems for an instant restart. An integrated system of sensors is then used to detect when the driver performs an action that signals the intent to drive off, such as pressing the accelerator or clutch pedal.

As soon as the driver prepares to move away, the engine starts quietly and almost instantly; it only takes the system around 0.3sec to fire up the engine. The process is near imperceptible, and happens before gear selection is completed.

To support the increased number of engine starts, the starter motor is upgraded with a high performance electric motor and a stronger pinion-engagement mechanism with reduced noise levels.

Smart Regenerative Charging

The new Focus ECOnetic also uses advanced technologies to ensure that the battery is kept charged in the most efficient way.

A Smart Regenerative Charging system increases the alternator output when the vehicle brakes or decelerates. This converts the kinetic energy of the vehicle into electric energy without having to use additional fuel.

The ‘free’ electric current is used to recharge the battery, so that it can be used by the electrical systems at a later stage. This could be when the engine is switched off during a stop-phase, but can also be when the generator is operating in a less efficient mode.

The battery has an advanced management system that continually monitors its status and communicates with the Ford Auto-Start-Stop system, so that the regenerative charging feature can charge the battery in the optimal way. The start-stop system knows how much battery charge is available, so that it can leave the engine running if the battery does not have a sufficient level of charge.

Khatir Soltani
Khatir Soltani
Automotive expert
  • Over 6 years experience as a car reviewer
  • Over 50 test drives in the last year
  • Involved in discussions with virtually every auto manufacturer in Canada