Consumers and regulators alike are demanding increased fuel economy for all vehicles, but no one wants to return to the grossly underpowered gas misers of the 1970’s. Engines have to be more fuel efficient, dramatically more in most cases, yet without sacrificing vehicle acceleration or towing performance.
Forced induction via supercharging or turbocharging has been the accepted norm for engine downsizing while retaining performance for decades. Each method has its weaknesses in practice, most of which are driven by system compromises that don’t provide exactly the boost demanded by the driver immediately upon demand.
Variable speed supercharging, enabled by the compact packaging and stable controls of the NuVinci CVP, is poised to obsolete all other forced induction methods. For the first time, powertrain developers and calibrators will have electronic full authority, closed loop control of boost.
Boost on demand, regardless of engine speed, expands the realm of the possible in terms of engine downsizing and downspeeding for improved fuel economy. A supercharger, equipped with NuVinci DeltaSeries technology, can be easily matched with other advanced fuel-saving technologies such as displacement-on-demand systems or even different combustion cycles, such as the Miller cycle.
A NuVinci supercharger accessory drive also helps commercial vehicle fleets reduce their high fuel costs and emissions equipment costs by providing diesel-like performance with gasoline engines – particularly in terms of launching and hauling. This reduces operating costs for heavy-duty fleets by enabling the use of equivalent and less expensive gasoline engines.
- More boost, providing higher performance, especially at lower engine speeds
- Reduction or even elimination of wasteful, noisy bypassing
- Full authority closed loop control of boost
- Improvements in fuel efficiency without sacrificing performance
- Diesel-like performance from gasoline engines (increased power density and increased low-end torque)
- Engine downsizing capabilities resulting in lower fuel and operating costs
How it Works
A NuVinci DeltaSeries supercharger drive delivers significantly more boost at low RPM. This enables high supercharger speeds at low engine speeds, providing increased torque for launch and towing, while reducing supercharger speed on demand for light loads or for traction control purposes. It does this by offering an infinite number of speed ratios between its high and low ratio extremes, with programmable instantaneous, smooth and continuous ratio changes.
Press Release: (San Diego, CA (April 26, 2012) Fallbrook Technologies Inc. (Fallbrook) is responding to the challenge for automakers to provide appropriate performance while downsizing engines for improved fuel economy and lower emissions. The Company has targeted and is soliciting select OEMs to adopt a variable speed supercharger drive utilizing its NuVinci® continuously variable planetary (CVP) technology.
Fallbrook has been working closely with a tier one automotive equipment supplier on the development of a variable speed automotive supercharger. Test results from that supplier have demonstrated potential fuel-saving, engine down-sizing and/or down-speeding opportunities without adversely affecting performance and drivability. Performance gains result from boost optimization over a wider power band, particularly at low engine speeds. NuVinci prototypes designed for use in an OEM application have also passed automotive class durability testing by the tier one supplier. Read the full press release.