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Stop-start standard in four-cylinder 2015 Chevrolet Impala

Chevrolet has announced that it will include stop-start technology as standard in the entry level 2015 Impala. The result is a nearly five-percent improvement in city fuel economy, also known as one mile per gallon, up to 25 mpg, combined. The 3.6-liter V-6 Impala will not feature stop-start. The 2015 Impala comes equipped with Chevrolet's 2.5-liter Ecotec four-cylinder engine, which will also offer 22 mpg in the city, and 31 on the highway. The 3.6-liter V-6 Impala will not feature stop-start and the mild-hybrid eAssist model from the 2014 MY, which got 29/25/35 combined/city/highway mpg, has been discontinued. Chevrolet spokesman Chad Lyons told Green Car Reports that not even one percent of the 2014 Impalas purchased were the Eco model. So Chevy is trying something different. With a seamless driving experience in mind, the new Impala's stop-start tech features software that governs under what conditions the feature will activate. The engine won't shut off if the car has not reached a speed of six miles per hour, so the start-stop won't be cycling during traffic jams. It can also fire the starter even if the engine has not come to a full stop, which quickens reaction time, particularly in instances of what Chevrolet calls "change-of-mind events." The stop-start function uses information about cabin temperature and humidity as well as battery charge to help determine whether or not to shut off the engine. The 2015 Impala has been engineered to reduce NVH, which will also help create a smoother stop-start experience for occupants, Chevy says. Motor mounts have been updated, and a burlier starter motor will help restart the engine after a stop. The Impala follows the 2014 Malibu as Chevrolet's second vehicle to feature stop-start tech. The four-cylinder model currently makes up over 30 percent of Impala sales. The 2015 Impala will be available beginning this summer, with a base MSRP of $27,735 (including destination charges). And while one MPG isn't a huge difference, neither is the price increase of just $50 for a bit of eco-minded innovation. Read on for more details in the press release below. Chevrolet Makes Stop/Start Standard in 2015 Impala Technology improves city fuel economy by 5 percent 2014-05-22 DETROIT – Stop/start technology will be standard on the 2015 Impala base 2.5-liter ECOTEC® engine, an addition that improves the vehicle's city fuel economy by nearly 5 percent, or one mile per gallon.

Watch how Corvette Racing's new collision-avoidance radar system works

When it comes to technology used in racecars, we generally expect it to trickle down to production cars, not the other way around. Well, Pratt & Miller has developed a new rear-facing radar that operates in a similar fashion to what we're used to in modern blind spot detection systems, only it is also capable of tracking cars as they approach and relaying vital information to the driver via a large display screen.
The innovative radar system debuted at last weekend's 12 Hours of Sebring for Corvette Racing, and this system makes perfect sense for endurance races like this since the cars sometimes have to drive through the night and in poor weather conditions.
The radar can detect cars even with poor visibility, and uses easy-to-distinguish symbols for the driver to identify.

GM recalls Colorado, Canyon, and Malibu for airbag problem

The Basics: General Motors will recall and issue a stop sale on 1,740 total examples of the 2016 Chevrolet Colorado, Malibu, and GMC Canyon. This includes 1,579 units in the US and 161 in Canada. The Problem: The second stage of the driver front airbag inflator might not be present. If this happens, the airbag won't fill as quickly as it should in a high-speed crash, which could increase the risk of injury, according to Reuters. This is not related in any way to Takata's inflator problems, and these parts come from a different supplier. Injuries/Deaths: None reported. The Fix: GM will replace the vehicles' airbag assemblies. If You Own One: GM spokesperson Tom Wilkinson told Autoblog he wasn't specifically sure when recall repairs would begin but said it would be "shortly." He expects the fixes to happen "quickly" because of the small number of affected vehicles, and many of them are either in transport or already in dealer stock. More Information: GM recalled the 2015 Canyon and Colorado in 2014 for a completely separate airbag issue. In that case, a manufacturing error improperly wired the connectors. Related Video: GM Statement GM is recalling 1,579 MY 2016 Chevrolet Colorado, GMC Canyon and Chevrolet Malibu vehicles in the United States and 161 in Canada to replace driver-side front airbags. The second stage of the airbag may not deploy properly in certain high-speed crashes. During a routine quality inspection, it was determined that a component required for a second-stage/high-output deployment was not loaded during the inflator build. Dealers will replace the driver-side front airbag assembly. There have been no reports of crashes or injuries related to this issue. This issue is unrelated to the ongoing Takata recalls.