GMC Creates 'Virtual' Hot And Cold Comfort

DETROIT, Jan. 6, 2012 /PRNewswire/ -- General Motors' climate control engineers call him The Iceman – a high-tech top gun whose team created a way to make vehicle passengers feel much warmer or cooler than the cabin temperature in which they are seated. The result: more-precise comfort control on the 2012 GMC Terrain.

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The Iceman – his real name is Jeff Bozeman – says an instinctive sense of frugality drives him to find ways to make heating and cooling systems more efficient.

"Maybe it's my Dutch heritage, but I'm hyper-focused on finding ways to improve driver and passenger comfort while using the absolute minimum amount of energy possible," said Bozeman.

His team conducts testing in GM's Climatic Wind Tunnel at the Warren (Mich.) Technical Center, where environmental chambers can mimic temperatures ranging from minus 40 to 140 degrees Fahrenheit.

Bozeman and his team use both real and digital dummies to pinpoint exactly where climate control air streams will provide maximum comfort without blasting cold or hot air where it is unneeded. The Iceman and his colleagues created Monika, a manikin wired with nickel-chromium sensors that provide detailed comfort feedback to engineers. If Monika is too hot or too cold, she lets engineers know.

GMC also created a sophisticated digital "dummy" that is a better physiological model of the human anatomy, said Bozeman.

"We can better understand things like skin temperature and perspiration and can get a read on a wide range of shapes and sizes of GMC customers," he said. Virtual testing speeds vehicle development, allowing climate control innovations to reach customers faster.

In the Terrain, engineers were challenged to balance highly styled vents and the aesthetic of the cabin design with the function of heating and air conditioning vents.

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