2019 Infiniti QX50 Review; Great Japanese SUV
Is just born, the Suv 2019 Infiniti QX50, but already has a place in the history of the car: In fact, is the first model equipped with a variable compression ratio engine.
The VC-Turbo is a two-liter turbocharged petrol engine and has a mechanism that allows you to continuously vary the position of the Pistons ‘ upper dead-point, so the compression ratio can vary between 8:1 and 14:1. The highest value, which allows achieving a high yield, is used when traveling with little gas; If instead, you ask for more performance, the compression ratio is lowered to prevent detonation, which would damage the engine. Thus falls the last barrier that the technicians had not yet managed to overcome in order to combine the high performance with the consumption contained. A long path, initiated by the Alfa Romeo in 1980 with the phase variation of the distribution and continued with the variable riser of the valves and with the suction manifolds of different lengths.
2019 Infiniti QX50 Engine Specs and Fuel Economy
Mechanical system. Japanese engineers have devised an ingenious system. The connecting rods are connected to one side of a barbell mounted on the crankshaft pins; The other end is connected to a rod in turn mounted on an eccentric shaft, which is rotated by a lever driven by an electric motor. In this way, when the rod rises, it lowers the opposite side of the barbell and then the connecting rod; Vice versa otherwise. Thus varies the position of the Pistons ‘ upper dead point and therefore the compression ratio, but also the stroke between 88.9 and 90.1 mm and the displacement between 1,970 and 1,997 cm3.
But how are this two liters from 271 hp and 380 Nm? Well, at least as much as I could test on the streets of Los Angeles and surroundings, where either you are in the queue or you go slow, because a myriad of signs indicate speed limits between 25 and 65 miles per hour (40 and 104 km/h) and it was certainly not my intention to do Acquaintance with a road agent.
However, I was curious to see if the variation of the compression ratio could be experienced with some uncertainty or vibration and from this point of view the VC-Turbo performs fine. One notices the mutation only thanks to the special indicator in the instrumentation, because the motor always turns around and rather silent, at least until it is tried to crush the gas thoroughly. Then the horses and the Newtonmetros feel, both in terms of noise (however muffled) and in terms of thrust: the House declares a zero-hundred in 6.3 seconds, not bad for a machine weighing 1,795 kg. If anything, it is to be estimated how much the engine can operate in the conditions of maximum efficiency, or with the higher compression ratio. Looking at the indicator, I noticed that at cruising speed this actually happens, but just accelerate a bit and the indicator will move immediately in the area of lower performance. And consumption, from onboard computers, stood at 20.9 miles per gallon, which correspond to 11.4 km/ liter.
2019 Infiniti QX50 Transmission
Said (well) engine, I can not say as much of the gearbox: the CVT is quite pleasing until you drive with a gas wire, but as soon as you ask for something more jumps out the usual elastic behavior of this type of transmission, which is always in Delay than throttle controls. and the possibility of grafting eight fixed ratios through the levers at the steering wheel only helps in part.
Cable steering. It is not possible not to mention, then, the steering “by wire” exclusive Infiniti, first on Q50 and now also on this SUV: it performs well, and offers the possibility to vary both the load on the steering wheel and the readiness of response. It also facilitates the operation of the ProPilot system, which combines the adaptive cruise control with the maintenance of the driving lane, so as to relieve (but not to reset) the driver’s commitment, which is always responsible for the guide.
2019 Infiniti QX50 Release Date
To finish, two words on the build quality, which is of high level: the cockpit is luxurious, with seats of cream-colored leather, the same material of the lower part of the plank, which also has light wood inserts, a band of blue microfiber and eyelid of skin Brown. Valuable the controls and well done also the trunk: too bad that the lock on the tailgate makes a nice show and the corresponding receipt is in sight, two inadequate details for the class of the car. All this, however, you can touch it with your hand, not before a year: The 2019 Infiniti QX50 will arrive in Europe only in 2019.