Mazda. Saturday , October 28th , 2017 - 11:09:13 AM
Short for "Intelligent Energy Loop", Mazda fuel-saving i-ELOOP brake energy regeneration system was the world first such passenger car technology to utilise a capacitor to store electricity recovered during braking. Mazda focused on the recurring deceleration and acceleration cycle of everyday driving conditions. Determining that a typical deceleration phase lasts only about 10 seconds, the company adopted an electric double-layer capacitor (EDLC) to quickly capture and temporarily store the recovered electricity rather than a dedicated lead-acid starter battery or lithium-ion unit.
The benefits are numerous. By optimising the vertical load on the tires to the given conditions, it keeps the vehicle on its intended path while significantly reducing the need for steering correction. The communication between driver and car is simply more efficient, which instils confidence and reduces driver fatigue. And safety, since a relaxed driver is also more alert. It also enhances comfort, since the smoother, "natural" transition of g-forces supresses occupants head and body movement. Developers looked closely at human perceptions to come up with a system that reacts so quickly as to be indiscernible. GVC therefore not only enables better control of the car than is possible for a person on their own, it also extremely subtle about it. The aforementioned deceleration force normally amounts to a g-force on the 2017 Mazda 6 that is scarcely distinguishable to occupants.
The next is the Natural Sound Smoother. Recently introduced on the SKYACTIV-D 1.5 in the Mazda 3, it has now been adapted for Mazda larger diesel. The technology uses a damper placed in the hollow part of each piston pin to stifle diesel knock in the 3.5kHz range. This is the engine noise most conspicuous in the cabin and typically experienced when starting from a standstill or accelerating gradually. Natural Sound Frequency Control, meanwhile, complements the Natural Sound Smoother by supressing the other three critical frequency bands (1.3kHz, 1.7kHz and 2.5kHz) where diesel powerplant components typically vibrate loudest. It does so by deviating the engine timing ever so slightly (in 100 microsecond units), thereby causing the pressure waves produced before, during and after combustion to cancel each other out. This reduces combustion-induced vibration and the resulting cabin resonance.
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