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GM Ultium tech can scavenge heat from everywhere, even you

GM likes to give us tidbits about its Ultium platform from time to time, and today it’s telling us about the platformÂ’s ability to capture waste heat from the propulsion system. In addition to capturing from the propulsion system, it can also capture humidity from both inside and outside the vehicle and even from passengersÂ’ body heat. Yes, you, your family and/or your friends are a usable heat source as far as GM EVs are concerned. It then deploys the heat in an advantageous way. If at this point, youÂ’re screaming, "Heat pump!" youÂ’d be right. WeÂ’re talking about an elaborate heat pump system that GM is using for its Ultium-based vehicles. Every Ultium-based GM vehicle gets this system that is covered by 11 patents and four publications. The waste heat it collects is used in a number of ways, but its primary use is to heat the cabin quickly and efficiently. GM claims it can heat the cabin of its Ultium-based vehicles quicker than vehicles with traditional internal combustion engines. Plus, when put to use, GM claims that using the heat pump provides its EVs with up to 10% more range than theyÂ’d have without. Beyond heating the cabin, the heat pump is capable of putting waste heat to use by preheating the battery prior to charging so that you can charge quicker. The system can even cool the propulsion system in preparation for Watts to Freedom (WTF) launch control starts. GM says this was vital in helping the Hummer EV achieve its bonkers 0-60 mph time of about 3 seconds. “Having a ground-up EV architecture gives us the freedom to build in standard features like UltiumÂ’s energy recovery capabilities,” said Doug Parks, GM executive VP of global product development, purchasing and supply chain. “This helps us squeeze more efficiency, performance and overall customer benefit out of our EVs.” GM says itÂ’s been developing heat pump technology since the EV1 and its heat pump. This is the modern evolution of that technology, and GM says itÂ’s going to be implemented in every Ultium-based vehicle as a standard feature. Related video: Green Cadillac Chevrolet GM GMC Technology Electric Future Vehicles

GM Recalling Another 2.7 Million Vehicles In Five Separate Campaigns

The recalls keep rolling in from General Motors, evidently keen to avoid repeating the mistakes of the ignition-switch debacle and clean house. This time they're all coming at once, with five separate recalls announced together covering approximately 2.7 million vehicles. The largest of the five actions involves over 2.4 million units of the previous-generation Chevrolet Malibu and Malibu Maxx, Pontiac G6 and Saturn Aura in order to fix brake light wiring harness, which have been found to be susceptible to corrosion. The recall is separate from the 56k Aura sedans which GM recently recalled over faulty shift cables, not to mention the previous massive recall of 1.3 million vehicles – some of them the same models – but appears to have resulted from the National Highway Traffic Safety Administration investigation that started with the G6 almost a year ago. The second-largest campaign involves the 2014 Chevy Malibu, specifically those fitted with GM's 2.5-liter engine and stop/start system, approximately 140,000 examples of which has been found to have problematic brakes. The issue does not appear to be connected to the recall of 8k Malibu and Buick LaCrosse sedans (also involving brake woes) which we reported upon last week. Four crashes have been reported in such models, but GM admits it's not yet clear if the problem was a contributing factor in the accidents. A further 112k Corvette models from the 2005-2007 model years are being called in for problems with their low-beam headlamps resulting from a flexing relay control circuit wire that's not meant to bend. GM says it is "aware of several hundred complaints" about this issue, but notes that there have been no reports of related accidents. In addition, over 19k examples of Cadillac CTS from the 2013 and 2014 model years are being recalled over windshield wipers that might not work after a jump start. Finally, GM is also bringing in 477 examples of its 2014 Chevy Silverado, Tahoe and GMC Sierra (though not the Yukon) to fix a problem with a tie rod in its steering rack. As ever, all recall repairs will be performed free of charge, and GM is now estimating that recall-related actions this quarter will result in an estimated $200-million charge against its second-quarter earnings. Read the full announcement from GM below for further details.

2020 Cadillac CT5 in New York: 7 questions with the chief engineer

Cadillac revealed the 2020 CT5 at the New York Auto Show, and we decided to sit down and have a chat with chief engineer Mike Bride to learn more about the car. You can read our reveal post here to get the full download, and then read on below to learn a bit more. Cadillac is still rather coy about any performance model to spawn from the CT5, but things appear to be looking up after our conversation that you can read below. Q: What's the driving nature of this car? Should we expect something similar to the CTS and ATS? A: Yes, you can see it's built off the rear-wheel-drive architecture. Our goal was to retain all of that fun-to-drive nature. Direct steering feel, responsive handling. Going forward, we ask how we can continuously improve, and that was really about driving more sophistication in the ride, a much more mannered car that's better for impact harshness and rolling isolation, really provides comfort when you want comfort over tire strips and heaves in the road. Really getting that level of isolation, but not compromising that handling and direct steering feel of the Cadillac sedans we've grown accustomed to. Q: How is this car different from the CTS underneath, and other Alpha platform cars? A: I would say this is a major revision. A lot of new parts, a lot of new part numbers, a significant evolution. In the suspension space, the links are all new, and there's been a lot of work done in isolation, so the bushings and strut mounts are all new. We've evolved the Alpha platform to now get the ride control and road isolation, the comfort aspects of it all. There are a lot of structural improvements like a changed wheelbase, an evolution in rear foot-swing and foot space from the fuel tank area to get in and out of the car better. As we developed this structure, it was about overall structural body stiffness, and impedance at the chassis attachments to really get that level of isolation from road inputs. We try to have a calm floor, a steering wheel that doesn't vibrate, and quiet to the driver's ear. Those were the paths we went after to really drive the structure to the right stiffness requirements, structural integrity, a lot of development into suspension bushings, tuning elements, strut mounts. We have a new damper technology, a ZF damper. It has MVS damper technology. It's a multi-valve system that provides less harshness from an NVH standpoint and a great optimization balance of motion control with ride inputs.