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John O | October 2016

Thermal management provides Audi with efficient engine


audi announced earlier this month that its new 2.0-liter tfsi four-cylinder engine will be available in the 2017 audi q7 models. according to the german car manufacturer the engine is lighter and more efficient than its predecessor, allowing for acceleration from 0-60 mph that is a half-second faster, 22 percent improvement in fuel economy and a curb weight 500 pounds lighter than the previous model.

 

audi_600

(wikimedia commons)

 

audi made enhancements to the exhaust manifold integration, the valvelift system, and added a new thermal management process to improve fuel efficiency. there is also a tiptronic® transmission that adds dynamic shifting characteristics that “optimize fuel consumption,” according to the audi website.

 

read more about the new engine at https://www.audiusa.com/newsroom/news/press-releases/2016/10/2017-audi-q7with-2-0-liter-tfsi-turbo-charged-four-cylinder.

 

audi has been working on thermal management designs for its hybrid line as well. a team of researchers developed a heat pump that is used in the audi q7 e-tron 3.0 tdi quattro and was featured in the company’s internal magazine, encounter technology.

 

the heat pump raises the temperature of the waste heat from the electric drivetrain to improve the electric vehicle’s range and provide greater driver comfort. according to the company, the pump improved the range by 15 percent (seven kilometers) and also managed to keep an interiors temperatures of 22°c even with exterior temperatures as low as 0°c.

 

the heat pump is connected to three refrigerant circuits – one tied into the automatic transmission, a second cooling the electric motor and power electronics, and the third cooling the battery and charging device. a control unit tells the system to select one of 200 switching states to optimize performance.

 

in order to heat the interior, the audi system compresses gaseous refrigerant to raise its temperature and the indirect condenser transfers the hot gas into the interior heating circuit where it cools and condenses. the liquid is expanded and evaporated in a chiller, which draws heat from the electric drivetrain.

 

this is just one of the processes that the audi engineers developed for the 2016 models. learn more about it at http://www.audi-encounter.com/p3media/file/image?id=2815&preset=download

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