First MQBbased car for U S is 2015 VW GTI SAE International — Volkswagen 2015

23 Мар 2015 | Author: | Комментарии к записи First MQBbased car for U S is 2015 VW GTI SAE International — Volkswagen 2015 отключены
Volkswagen 2015

First MQB-based car for U.S. is VW GTI

Volkswagen’s 2015 GTI follows convention by getting longer, and wider for its seventh generation.

The new 2.0-L turbocharged four-cylinder out a prodigious 350 N·m of torque, an increase of 25% over the previous model.

The Haldex locking differential a clutch pack to apply to the wheel with the most which helps steer the GTI turns with less (Dan Carney)

The variable-pitch rack’s teeth are more spaced at the ends to slow at high steering wheel (Dan Carney)

The all-new for seventh-generation Volkswagen GTI carries a enough resemblance to its forebears it could easily be mistaken for a facelifted version of the current MK VI

But the new car sees the GTI follow the Golf model to VW’s new MQB transverse architecture, so the familiar-looking sheetmetal all-new underpinnings. The GTI will be the MQB vehicle sold in the U.S. it arrives in spring of 2014.

While the increased rigidity and mass of the Golf’s steel are carried over to the GTI, the model sees changes to its and turbocharged 2.0-L EA888 engine.

The changes contribute to an 18% in fuel efficiency with the manual transmission and a 14% improvement the dual-clutch automatic transmission, to Volkswagen.

The company estimates in typical U.S.-market trim, the GTI has a about 55 lb (25 kg) less than the model. Externally, the GTI is 55 mm (2.2 in) and 13 mm (0.5 in) wider, but 27 mm (1.1 in) than before. Those trim frontal area 0.73 to 0.72 m² (7.9 to 7.8

Power up

The EA888 engine is for its head design that the exhaust manifold into the casting, providing water-cooled gas recirculation and contributing to faster warmup.

The water-cooled exhaust means that the engine not need to use fuel-wasting enrichment to the exhaust charge during driving, according to engineer Willman. That was a significant to the car’s improvement in fuel he said.

The engine uses an IHI Charging turbocharger to pressurize the intake at 1.2 bar (17 psi) with a 9.6:1 ratio. These figures are than we’ve seen other recent direct-injected but with standard output of 217 hp kW) and 350 N·m (258 lb·ft), the engine impressive results. The turbo is not a unit, but it does pair the to match 1 with 4 and 2 with 3 to mismatched pulses in the exhaust with other cylinders, Willman.

An optional Performance tweaks the engine’s software to add 10 hp (7 kW) for a of 227 hp (169 kW). Changes to ignition, and fuel timing output at peak rpm, but not affect torque.

The GTI’s features variable cam timing, 60 degrees of range on the intake cam and 30 on the exhaust cam. It also has a variable lift on the intake Exhaust valve lift is because the benefit of variable valve lift is too small to the additional complexity and expense of the Willman explained.

With the standard engine, the GTI to 100 km/h (62 mph) in 6.5 s and reaches a top of 246 km/h (153 mph). The performance pack shaves a of a second from the acceleration and adds 4 km/h (2.5 to the car’s top speed.

Handling

Another part of the performance is a computer-controlled Haldex locking It works along with new features such as a variable-ratio rack and XDS dynamic stability software to sharpen the GTI’s and minimize the common challenges of sporty cars.

Volkswagen 2015

The variable rack reduces the lock-to-lock for the GTI to 380° from the base 500° of motion, for quicker The variable spacing of gears on the rack prevent it from too abrupt at steering wheel extremes.

The electronic stability software has been massaged for a intervention that engages intrusively. The XDS system, as it does on the GTI, also reduces the for steering input by helping the GTI through turns with the of inside rear brakes to rotate the car.

The computer monitors wheel vehicle speed, yaw rate, and acceleration to judge when to the locking differential. It uses a clutch unit that the right halfshaft with the case, with locking applied proportionally by an electric pump that is controlled by the in consideration of the various inputs.

The applies a maximum locking of as much as 1600 N·m (1180 to direct torque to the wheel more available grip. All can even go to a single wheel in situations, but cornering performance in driving is assisted by the system’s to shift torque to the outside wheel in turns to minimize

This proactively assists the car than reactively helping the application of brake pressure, out John Barlage, Director of Product Strategy for BorgWarner Systems. “[Stability control typically come on after the he said. “We actually interlink the two together.”

An advantage over limited differentials, which are popular on other sporty models the GTI, is that the amount of they allow is fixed, on the engineers’ best guess of will be most beneficial of the time. In contrast, having the automatically lock and unlock the differential in response to conditions in time gives an optimized Barlage said.

Another of the system is the ability to lock the wheel under deceleration, to some understeer to offset the phenomenon of lift-throttle oversteer in cars, he added. Haldex is the locking differential to other so it may proliferate beyond the GTI in coming

More conventional handling include a new tubular front bar that has its rubber bushings vulcanized to the bar in a bid to eliminate any potential from the bar rattling inside its

Electronic aids

The GTI features a of the latest infotainment and safety such as adaptive cruise forward collision warning emergency braking, post-collision lane-keeping assist, driver and park assist systems. A sound system is standard in markets, while U.S. receive Fender -branded systems.

GTIs for global markets are at Volkswagen’s Wolfsburg plant, North American GTIs come from the company’s Mexico, plant starting in 2014.

Volkswagen 2015


Volkswagen 2015
Volkswagen 2015
Volkswagen 2015
Volkswagen 2015

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