Thu
Dec 11 2008

Could the 'electric Mondeo' kill the diesel?

Hilton Holloway
The US ‘Big Three’ car makers are getting a serious kicking at the moment. Much of the criticism is centred on failing to build cars that matched the - mostly Asian - competition.

That, of course, and their notorious reliance on ‘gas-guzzlers’.

However, Ford has just let the press drive its new US-market Fusion Hybrid and the narrative could be about to change.



The Mondeo-sized Fusion (which is actually based on the Mazda 6) gets a mild hybrid set-up, with an electric motor/generator sandwiched into a CVT transmission, which is driven by a 2.5-litre four-cylinder petrol engine.

It's an updated version of the hybrid transmission in the Ford Escape SUV. The nickel-metal-hydride battery pack now weighs 70kg(23 percent less) and other changes will now allow the Fusion to hit 47mph in pure electric mode.

Amazingly, the first results from test drives in LA suggest the Fusion is capable of around 50mpg in UK gallons.

If this is replicated in real life use, switched-on European drivers will be wondering when an ‘Electric Mondeo’ will appear.

That’s because it’s not just about the fuel economy argument. One of the main reasons Toyota developed the hybrid is because it delivered better fuel economy without the tailpipe pollution of a diesel.

In fact, the previous-generation Escape Hybrid met Super Ultra Low Emission Vehicle (SULEV II) and Advanced Technology Partial Zero Emissions Vehicle (AT-PZEV) standards.

Indeed, so strict are Californian’s air pollution standards, diesel-powered cars were effectively banned in 1990 because of their particulate (soot) and nitrogen oxide (NoX) emissions.

Today, diesel cars can only be sold in California if they meet standards so strict that they’re equivalent to Euro 6 limits,  which are not due for introduction in Europe until 2014.

This is relevant to us Europeans, because there evidence that the EU will be following California’s lead and clamping down even further on the particulates and NoX emissions, particularly in city centres.

And while diesel engines can be cleaned up with complex NoX traps and urea injections, will it be easier – and cheaper – in the long run to switch to a Fusion-style petrol-hybrid drive train?

Will the electric Mondeo remain a dream, or could it kill the diesel?



 


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About Hilton Holloway

Has two product design degrees and used to design mountain bikes. Realised that cars were a lot more interesting in 1990, and has been writing about them ever since.

Comments

jerry99 December 11, 2008 6:15 PM

I hope not.

Hybrids make sense as commuter cars in cities but for those who still drive long ditsances for a living the diesel is better.

On the open road the weight penalty of the hybrid is a major drawback.

Vertigo December 11, 2008 8:30 PM

Care to elaborate Jerry?

Greg Barton December 11, 2008 10:06 PM

It'll be a while before hybrid or fully electric technology is cheaper than urea injection systems. But there's still the fundamental problem with electric cars, which is the fact that the electricity still predominantly comes from fossil fuelled power stations.

jerry99 December 12, 2008 10:08 AM

They hybrid drive train mentioned above requires a 2.4 l petrol engine, a heavy transmission, the electric motors and some batteries. All of this means that the weight of the vehicle goes up which of course in turn adds further weight as the brakes and suspension need to be beefed up.

In town moving all this extra weight around is mitigated as the petrol engine runs for short periods at high efficiency to keep the batteries charged.

On the open road at speed (difficult to find in the UK today I know) the petrol engine runs most of the timeand it has to work harder to move all the extra weight.  

A good diesel engine is running much closer to its optimum efficiency under these circumstances and is not having to move so much weight. If stop start technology is added to the diesel its in town emissions would be significantly reduced.

Hence a car used little for in town driving and a lot on the highway between towns is more efficient with a diesel.

coolGav December 12, 2008 10:44 AM

I totally agree about diesel being better for longer distances. I guess that since this car is from the US, where a Mondeo isn't classified as being large. So its more likely to be an everyday car that is used in the city, as well as highway. In the UK though (IMHO) hybrids make more sense in supermini class cars, where they're likely to do more city driving - although the packaging is difficult with present technologies.

It would be good to offer a hybrid Mondeo, but only when there's a hybrid Focus and Fiesta too...

Vertigo December 12, 2008 11:52 AM

Actually city driving isn't exactly optimal for hybrids, because there isn't enough kinetic energy harnessed by the braking to charge the batteries properly (and lots of standing-starts, which are big power drains). After a while it'll be running virtually engine-only. A regular car with Stop/Start tech and regenerative braking handles city driving just as well.

Open-road driving is theoretically a hybrid's most ideal environment, because there's much more opportunity to generate power, giving the engine less work. But really they need to be able to generate and store more energy than they currently do - the mk3 Prius should be a lot better in this regard. Shame it looks so hideous though; I'm in the minority in that I very much like the mk2.

m ben December 12, 2008 2:58 PM

The Fusion is not a "mild" hybrid, it is a full HEV capable of operation only on battery power - just like the Prius or Hybrid Escape.  mild hybrids are primarily something only GM has done recently, with their Chevrolet Malibu, Saturn Vue (aka Opel Antara) & full-sized trucks.  the Yukon/Escalade is a full HEV based on the shared hybrid tech developed with BMW & Mercedes.

diesel cars are a non-starter at the moment in the US as diesel is ~40% more expensive than petrol, so any efficiency gains are overwhelmed by the added cost of fuel.

jerry99 December 15, 2008 1:34 PM

By highway driving I have in mind motorway driving without the regular hold ups. I find that planning ahead as much as possible rather than braking sharply as somebody enivitably pulled out past a truck at the last moment gains 4 or 5 mpg in a Mondeo 2.0 TDCi.

In congested driving does this indicate that gradual acceleration couple with harsh braking is the optimum stratergy for efficiency with a hybrid?

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