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Posts with tag engine technology

Engines of the future survey includes some surprising results

Filed under: Biodiesel, Diesel, Ethanol, Hybrid, Hydrogen

In December, an online survey was conducted asking recent new car purchasers, among other things, what they think the engine of the future will be powered by. Here is a small breakdown of the data obtained by PULS in Germany:

I hope you like that chart, it took me half an hour to put it together (do you see what I do for you, readers). Anyway, I find a few things interesting here. For instance, in only one area of the world surveyed did biofuels score the highest. Multiple answers were allowed, however, so perhaps many people who assumed biofuels will become a large part of the automotive landscape also believe they will be paired with a hybrid powertrain. Also, there was no option to choose electric only, which would have been interesting to see. Hydrogen looks like a popular choice!

Give us your opinions.

Related:

[Source: PULS and PRWeb]

Can't find a hybrid? Look for other advanced engine technology to improve mileage

Filed under: Emerging Technologies, MPG, DaimlerChrysler, GM, Toyota

Hybrids get all the attention these days, says a story in the Chicago Tribune, but automakers have other engine technology that consumers should consider.

Toyota engineer Dave Hermance said variable valve timing and direct injection improve mileage and manage emissions better. GM's Dave Lancaster pointed to cylinder deactivation in Vortec V8 engines and direct injection (shown in photo) in the Ecotec 4-cylinder engines. DaimlerChrysler's Mark Chernoby added the benefits of diesel.

The engineers also touted other fuel-saving measures that need to be applied to vehicles, such as improved transmissions, weight reduction and better aerodynamics. But Chernoby said the long-term goal is to move away from oil-based engines toward hydrogen.

"That's when you'll see significant jumps in fuel efficiency," he said.

My only point of contention was with an episode that Lancaster recalled. The story said he found the fuel economy display on a new Suburban showing 23mpg while going 70 to 75mph in the V4 mode. I recently drove a new Avalanche, which is based on the Suburban, and found it difficult to keep the engine in V4 in any condition other than downhill or coasting. I've heard many complaints voiced that the cylinder deactivation, formerly called Displacement on Demand and now trademarked as Active Fuel Management, is too timid and won't stay on long enough to achieve significant savings. If memory serves, the V4 mode didn't even come on during idle. When I see 23mpg on the display for an extended length of time while not going downhill or coasting in a Suburban, I'll be impressed.

[Source: Chicago Tribune]

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