Zombie thread lives again!
Saw this pic/article and had to post:
BorgWarner Exhaust Heat Recovery System for hybrids can improve fuel economy by up to 8.5%
Quote:
|
During engine cold starts, a valve controls the exhaust gas flow, routing it through a heat exchanger, where the thermal energy of the gas heats up the vehicle’s subsystem fluids. As a result, the engine warms up faster.
|