Toyota Camry Hybrid CNG concept unveiled in 2008 LA autoshow

Gas prices are relatively low now, but they were incredibly high last summer, and could well revert to those high levels. But the price of compressed natural gas (CNG) remains fairly stable, and there’s a strong, reliable domestic supply of CNG. It just happens to be one of many alternative fuel applications being explored in Toyota’s broad sustainable mobility research and development strategy.

That’s why we built a special concept CNG Camry Hybrid that we’ll display at the Los Angeles Auto Show on Wednesday.

To convert a stock Camry Hybrid to a CNG vehicle, the gasoline fuel system was replaced with a CNG system that includes a pair of CNG tanks installed in the spare-tire well of the vehicle’s trunk. Because it now lacks a spare tire, the CNG Camry Hybrid rolls on runflat tires.

And roll it does. With the proposed CNG equivalent of 8 gallons of gasoline in its tanks, the estimated range of the CNG Camry Hybrid is more than 250 miles. Link that efficiency to the price of CNG and you can see why we’re interested in this – as this is written, CNG is about a dime cheaper, per gallon, than the national average price of regular-grade 87-octane gasoline.

But price and efficiency are only the tip of the iceberg of CNG benefits. Natural gas also produces lower particulate emissions and lower levels of nitrous oxide (NOx), carbon monoxide (CO), carbon dioxide (CO2) and non-methane organic gasses (NMOG) when compared with gasoline. And because CNG is so clean, potential wear and tear on an engine fueled by it is greatly reduced.

Those are the considerable upsides to CNG. There also are downsides. An important one is that there are fewer than 1,000 CNG refueling stations in the U.S., with fewer than half of them open to the public. Also, natural gas is less dense than gasoline. So a CNG engine will have approximately 10% less power than an equivalent gasoline engine. Also, a CNG vehicle’s fuel tank must be cylindrical, so it is more difficult to package than a gasoline tank, which can be shaped to conform to any available space.

Source : blog.toyota.com

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