Chrysler plans to offer its stop-start technology as standard equipment on certain models of the ’15 Jeep Cherokee SUV and Chrysler 200 midsize sedan, as the automaker works to meet tightening U.S. fuel-economy and carbon-dioxide rules.

Environmental Protection Agency mandates for 2014 calls for vehicle fleets to achieve 31.3 mpg (7.5 L/100 km), followed by 32.6 mpg (7.2 L/100 km) and 34.1 mpg (6.9 L/100 km) in 2015 and 2016, respectively.

The Chrysler 200 equipped with the 2.4L Tigershark inline 4-cyl. engine and Cherokee with the 3.2L Pentastar V-6, will come standard with the fuel-saving start-stop system.

The automaker says the two applications of the technology in the 200 and Cherokee will reduce CO2 emissions by up to 3%. It will be added to the Cherokee in the third-quarter and to the 200 in Q4.

First introduced in the Ram 1500 pickup, the technology is based on a high-speed starter that reduces crank time for quicker restarts. It’s activated by algorithms that act on a vehicle’s powertrain and chassis components, the automaker says.

bpope@wardsauto.com