Technical data about the new 2011 Infiniti QX56

Power and Innovation Under the Skin

Structural changes include a new high-stiffness frame structure with enlarged side rail section width, redesigned connecting structures between each crossmember and side rails, an integrated rear hitch member, improved stiffness of the cabin mounting points and a special rear body ring structure around the tailgate.

“Customers will never be aware of the extensive efforts taken in the development of the QX frame and body to reduce flex, rattles and squeaks – they’ll just enjoy a quiet, comfortable ride that’s unexpected in a full-size SUV,” added Poore.

“The new platform can handle family adventures to rugged terrain, without compromising its smooth ride for everyday, around-town cruising.”

The second-generation Infiniti QX also offers new engine and transmission designs – delivering, a combination of power, efficiency and refinement worthy of the Infiniti name. The new 5.6-liter 32-valve DOHC aluminum-alloy V8 features Infiniti’s advanced VVEL (for Variable Valve Event & Lift) technology and new Direct Injection Gasoline (DIG™) system.

The VVEL system combines hydraulic-controlled variable valve timing and electronically controlled variable valve lift on the intake side to help improve performance and response. Throttle response is enhanced by directly controlling the intake valve, rather than using the traditional method of controlling intake with the throttle valve.

The VVEL system also offers improved emissions and fuel efficiency (over non-VVEL designs) by substantially reducing the intake resistance that occurs when the engine’s throttle valve opening is narrowed and output is low.

The new DIG™ system provides better wide-open throttle performance and improved fuel economy and emissions performance by reducing engine knock, improving combustion stability and offering more precise injection control.

The engine is rated at 400 horsepower and 413 lb-ft of torque, compared with 320 horsepower and 393 lb-ft of torque produced by the 2010 QX’s non-VVEL/non-DIG™ V8.

With a 25% increase in horsepower, the 2011 QX does not sacrifice fuel economy, which increases by more than 10% versus the 2010 QX.

Also contributing to the enhanced fuel economy is the 2011 QX’s standard 7-speed automatic transmission with Adaptive Shift Control (ASC) and manual shift mode with Downshift Rev Match.

Versus the 2010 QX’s 5-speed automatic, the new 7-speed transmission boasts a wider range of gear ratios, a variable lockup torque converter, a new improved shift schedule and a new automatic transmission fluid warmer designed to reduce fuel consumption at start up.

The QX is offered in two-wheel drive and four-wheel drive, with the 4WD model featuring Infiniti’s proven All-Mode 4WD? system with Auto, 4H, and 4L modes. The system is designed to distribute torque to all four wheels when road conditions warrant (up to 50 percent can go to the front wheels on demand), helping to enhance traction.




Author: AL
Source: Autolatest