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INFINITI QX50’s VC-Turbo engine combines high horsepower and torque with strong fuel efficiency

This unique variable compression technology represents a breakthrough in combustion engine design.

TAS News Service
Feb 11, 2020 12:10 pm

MUSCAT: INFINITI QX50 powered by INFINITI’s new 2.0-liter VC-Turbo, the world’s first production-ready variable compression ratio engine is justifiably considered one of the most advanced internal combustion engines ever created.


This unique variable compression technology represents a breakthrough in combustion engine design. The engine continually transforms, adjusting its compression ratio to optimize power and fuel efficiency. As a result, it combines the power of a 2.0-liter turbocharged gasoline engine with the torque and efficiency of an advanced four-cylinder diesel engine.

The VC-Turbo changes its compression ratio seamlessly with an advanced multi-link system, continuously raising or lowering the pistons’ reach to transform compression ratio – offering both power and efficiency on demand. A high compression ratio gives greater efficiency, but in certain applications poses the risk of premature combustion (knocking). A low compression ratio allows for greater power and torque, and avoids knocking.

A senior spokesperson at INFINITI Oman said, “The VC-Turbo engine of INFINITI QX50 is competitively efficient, and delivers 268 hp (200 kW) and (380 Nm). Front-wheel drive models offer a 35% improvement in fuel efficiency over the previous V6 gasoline QX50; all-wheel drive models offer a 30% improvement.”

The engine is paired with a continuously-variable transmission (CVT), for seamless power delivery. Its infinite number of gears perfectly matches the engine’s ability to transform. The INFINITI’s QX50’s 2.0-liter VC-Turbo engine also employs the world’s first active engine mount vibration damping system, called an Active Torque Rod, to reduce engine noise even further.

New standards for refinement

The INFINITI QX50 is built on an all-new platform, featuring a front-engine, front-wheel drive-based layout. Engineered with flexibility of application in mind, the new platform sets new standards for refinement, rigidity and interior space in the compact premium SUV segment.

The platform’s layout allows for higher levels of packaging efficiency than before, resulting in the QX50’s ideal interior proportions for passengers and cargo.

The QX50 represents the first automotive use of SHF (Super High Formability) 980 MPa high-tensile steel, further strengthening the all-new platform. The high-tensile material can be molded into unprecedented shapes, saving weight and representing a torsional rigidity improvement of 23% over the current QX50. This rigidity allows the car to resist flex and vibrations, as well as reduce the level of noise transmitted to the cabin.

Powerful Elegance design

Remaining true to the design of the QX50 Concept and QX Sport Inspiration, the QX50’s aerodynamic exterior reinterprets INFINITI’s distinctive Powerful Elegance design language and signature design cues for the SUV segment. It combines a confident stance with intelligent packaging, while deep character lines highlight the influence of human artistry in the design process.

At 1,678 mm in height, the QX50 stands out on the road. Its elevated driver position maximizes visibility, for a clear view whether driving or parking. Aerodynamic efficiency is key to the QX50’s design – the drag coefficient is reduced by 6% compared to the previous QX50. Its hood, bumpers, A-pillar, tailgate and enclosed underbody are all specially designed to encourage airflow over, around and under the vehicle, with minimal turbulence.

The unrivalled interior space, artistic application of high-quality materials, and advanced craftsmanship make the cabin as welcoming and comfortable as it is flexible. Driver-centric, yet passenger-minded, the QX50 offers a package of technologies to enhance the driving experience. Its asymmetric layout and calm connected ambience are designed to meet different needs of the driver and passengers.

The cabin boasts ample space, with a sliding rear bench enhancing cabin and cargo flexibility and rear legroom. The trunk’s volume expands from 881 liters SAE to 1,773 liters SAE with the rear seats folded. With all seats in place, it accommodates three golf bags, or a stroller stored lengthways, with space for additional cargo. Under-floor storage areas allow owners to stow other items out of sight.

Technical specifications

Body and chassis

Five-door, five-seater SUV, with all-steel unitary construction bodyshell. Four-cylinder variable compression ratio turbocharged engine driving the front or all wheels via continuously-variable transmission.

Engine

2.0-liter VC-Turbo gasoline

Type: Turbocharged four-cylinder in-line with variable compression ratio

Displacement (cc): 1,997 (8:1 CR) ~ 1,970 (14:1)

Bore and stroke: 84.0 x 90.1 mm (8:1 CR) ~ 84.0 x 88.9 mm (14:1 CR)

Compression ratio: 8:1 ~ 14:1 (variable)

Max power: 268 hp (200 kW) @ 5,600 rpm

Max torque: (380 Nm) @ 4,400 rpm

Valves: 16

Fuel system: Direct injection and multi-port (variable)

Transmission

XTRONIC continuously-variable transmission with manual shift mode 

Performance

0-to-60 mph: 6.3 secs (AWD) / 6.7 secs (FWD* *

Top speed (kph): (230 kph)

Dimensions (imm)

Overall length:  4,700

Overall height: 1,678

Overall width* : 1,903

Wheelbase: 2,800

Ground clearance: 21 7

*excluding door mirrors

SBA commitment 

SBA is largely committed to supporting INFINITI Oman’s growth in the Sultanate through major emphasis on customer satisfaction and by providing world-class after-sales services in Oman. With a national network of more than 40 showrooms, service centers and parts outlets, SBA has further built upon its legacy of trust, excellent customer service and providing value for money to each of its customers.

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