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John O | February 2018

Hybrid truck boasts novel air-cooled motor-generator system

by josh perry, editor


according to a report from hybridcars.com, the 2019 dodge ram 1500 hybrid will feature a new cooling system for the v8 version of the motor-generator, but rather uses air cooling, which the article points out should reduce the cost of the vehicle significantly.


details have emerged about the 2019 dodge ram 1500 hybrid models.
(wikimedia commons)


“the motor-generator is mounted in front of the intake manifold on the eight-cylinder version and runs off the crankshaft via an eight-rib belt that is similar to something you might find on a supercharged engine,” the article explained. “the traditional belt tensioner is replaced by a high-pressure unit that is very similar to the one used on the gm bas system and will likely require a hold-down tool for belt removal. the 48-volt system feeds power to a small 0.3 kwh nmc battery pack mounted on the back wall of the cab.”


the system fits into the same space as a traditional alternator, but space is also opened up by the lack of coolant lines that would typically be wrapped around the engine. in addition, the article outlined, the electronics package sits on top of the motor and has an aluminum heat sink to dissipate heat.


a patent application was filed in november by magneti marelli for the air-cooled motor.


“the application states that the system employs a shaft-mounted fan that is internal to the motor case, which works in conjunction with the heat sink mounted on top without requiring the deployment of a liquid cooling system,” the hybridcars.com report said. “in some versions of the system, two internal fans are deployed so that one cools the motor section while the other cools the power electronics mounted on top.”


the air-cooled motor produces 12 kw (16 horsepower) or lower, as anything above that figure would require liquid cooling systems.


for more details about the new dodge ram hybrids, read http://www.thetruthaboutcars.com/2018/01/2019-ram-1500-details.

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