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Hyundai CVVD engine brings another dimension to valve timing

A new technology from Hyundai Motor Group places another marker on the march to more efficient internal combustion engines. Called Continuously Variable Valve Duration, the innovation permits two options for how long the intake valves remain open during the combustion cycle. The feature adds a third take on valve chicanery, atop variable valve timing that changes when valves open, and variable valve lift that changes how far valves open. Hyundai says the feature returns a 4% improvement in performance, a 5% increase in fuel economy, and lowers emissions by 12%. Hyundai applied for two patents on the valvetrain process in South Korea in 2011 and again in 2015. The altered valve duration in this latest iteration is made possible by two movable arms inside the camshaft. Each arm is anchored at its base to a pin at the center of the camshaft, while the end of each arm extends toward the edge of the camshaft. Changing the position of the pin in the center of the camshaft changes the angle of the arms relative to one another, which moves the camshaft along its mounting rod. Voila, a new intake cam profile that either lengthens or shortens valve overlap.   During low-speed spells at low load, CVVD opens the intake valve from the middle to the end of compression stroke. The weaker detonation isn't a factor at low load, and the reduced friction during compression improves fuel economy. During heavy engine loads, the intake valve closes at the beginning of the compression stroke to maximize the amount of air mixed for detonation, boosting torque. Four additional features enhance the benefits of CVVD. A more powerful direct injection system increases fuel spray pressure from 250 bar to 350 bar. Hyundai doesn't go into details on its Integrated Thermal Management System, but says the ITMS "quickly heats or cools the engine to the optimal temperature." Low-friction components lower overall engine friction by 34 percent. And a low-pressure exhaust gas recirculation layout diverts low-pressure exhaust gas from the traditional EGR route to the turbocharger compressor under high load for better fuel efficiency.   The first engine to boast the new tech is the Smartstream G1.6 T-GDi four-cylinder, which produces 180 horsepower and 195 pound-feet of torque. It will appear in the 2020 Hyundai Sonata Turbo going on sale in South Korea later this year.

Hyundai CEO touts new EV platform with mention of a pickup

A couple of years ago, one of the prominent concerns about a saturated EV auto-scape was how carmakers would accentuate brand differences among vehicles converging on a frightening sameness. The cars wouldn't make any noise, they would all emphasize aerodynamics, and they would all basically ride on a battery pancake. So far, the fears have been avoided; a Volvo XC40 Recharge won't be confused for a Ford Mustang Mach-E, for instance, and the Ford won't be confused for a Tesla Model Y. Not only that, but automakers are developing platform strategies that heighten the sameness among vehicle architectures because the architecture is where the expenditure and the profit are greatest. Hyundai's the latest to outline its plans for investors. And part of Hyundai's plan could include adding a full-size electric pickup to the range. The mid- to long-term roadmap is called the Hyundai Motor Way, recently revised with higher targets thanks to the swift uptick in EV sales globally. Business Korea wrote Hyundai Motor Group (HMG includes Kia and Genesis) sold 510,000 battery-electric vehicles in 2022. The conglomerate says it now plans to sell two million EVs annually by 2030, up from a previous estimate of 1.87 million.      The platform that will help make this possible is called eM, an evolution of the current Electric Global Modular Platform (e-GMP) platform under HMG's current EVs. The eM architecture's been rumored to launch under a Kia sedan that might be a spiritual successor to the Stinger. So far, eM is planned for 13 models across the HMG portfolio, using the Integrated Modular Architecture (IMA) that can plug-and-play with more than 80 common modules serving different vehicle segments and sizes. HMG president and CEO Jaehoon Chang said, "In the second-generation platform, the scope of vehicle development extends beyond the mid-sized SUVs covered by the current E-GMP system. It encompasses nearly all vehicle classes, ranging from small and large SUVs to pickup trucks, along with the flagship models of the Genesis brand." Sure, Chang could have been merely noting the eM's potential use cases when he mentioned "pickup trucks." That's not how observers are reading the line. At Kia's investor day last year, the brand said it planned two electric pickups. There have already been reports that Kia's working on a body-on-frame pickup for the Australian market, perhaps called Tasman, utilizing gas and electric powertrains.

Hyundai Sonata PHEV may be a game (and mind) changer

If you really, really want to consume volts instead of fuel on your way to work, school or shopping, you currently have just three options: pure EV, hydrogen fuel cell, or plug-in hybrid EV. Much as we love them, we all know the disadvantages of BEVs: high prices due to high battery cost (even though subsidized by their makers), limited range and long recharges. Yes, I know: six-figure (giant-battery) Teslas can deliver a couple hundred miles and Supercharge to ~80 percent in 10 minutes. But few of us can afford one of those, Tesla's high-voltage chargers are hardly as plentiful as gas stations, and even 10 minutes is a meaningful chunk out of a busy day. Also, good luck finding a Tesla dealership to fix whatever goes wrong (other than downloadable software updates) when it inevitably does. There still aren't any. Even more expensive, still rare as honest politicians, and much more challenging to refuel are FCEVs. You can lease one from Honda or Hyundai, and maybe soon Toyota, provided you live in Southern California and have ample disposable income. But you'd best limit your driving to within 100 miles or so of the small (but growing) number of hydrogen fueling stations in that state if you don't want to complete your trip on the back of a flatbed. That leaves PHEVs as the only reasonably affordable, practical choice. Yes, you can operate a conventional parallel hybrid in EV mode...for a mile or so at creep-along speeds. But if your mission is getting to work, school or the mall (and maybe back) most days without burning any fuel – while basking in the security of having a range-extender in reserve when you need it – your choices are extended-range EVs. That means the Chevrolet Volt, Cadillac ELR or a BMW i3 with the optional range-extender engine, and plug-in parallel hybrids. Regular readers know that, except for their high prices, I'm partial to EREVs. They are series hybrids whose small, fuel-efficient engines don't even start (except in certain rare, extreme conditions) until their batteries are spent. That means you can drive 30-40 (Volt, ELR) or 70-80 miles (i3) without consuming a drop of fuel. And until now, I've been fairly skeptical of plug-in versions of conventional parallel hybrids. Why?