By September 6, 2013 Read More →

2014 Volkswagen Golf R gets a power boost

VW Golf R 2014_frontThe 2014 Volkswagen Golf R has an even more advanced version of the EA888 four-cylinder turbocharged and direct-injection 2.0-liter engine that’s fitted to the new Volkswagen Golf GTI. The cylinder head together with exhaust valves, valve seats, and springs, pistons, high-pressure injection valves, and turbocharger have been modified or completely redesigned compared to the GTI engine. Compared to the 227 hp GTI engine, the engineers boosted power by 69 hp to 296 hp (221 kW), delivered at 5500 rpm. Thanks to its new fully-electronic coolant control system, the Golf R’s TSI engine has much more efficient thermal management with a reduced warm-up phase; this reduces frictional losses and fuel consumption. In addition, the TSI engine has variable valve timing on both the intake and exhaust sides, as well as two-stage exhaust-valve lift. This enables optimal control of the charge exchange process for better performance, fuel economy and low emissions.

With a manual transmission, the Golf R reaches 100 km/h (62 mph) from rest in just 5.3 seconds. With the DSG dual-clutch automatic transmission, the car completes the sprint in just 4.9 seconds. The Golf R’s top speed is electronically limited to 250 km/h (155 mph). CO2 emissions were also improved from 199 to 165 g/km. Even more fuel efficient is the Golf R that is equipped with a Stop-Start system and battery regeneration, together with the optional 6-speed dual-clutch gearbox (DSG). In this configuration, fuel consumption is 6.9 l/100 km (34 mpg). Fuel savings compared to the previous model with DSG (8.4 l/100 km) are 1.5 l/100 km, which represents the mentioned 18 per cent improvement.

Volkswagen Golf R delivers its power through the latest generation 4Motion system. Using refinements such as the Haldex 5 coupling, the 4Motion system is activated before any wheelspin occurs, eliminating nearly all traction losses. The system achieves this by using an advanced control function based on specific driving conditions. When operating under a relatively low load or when coasting, the front wheels are driven and the rear axle is decoupled, helping to save fuel. However, the rear wheels can be variably engaged in fractions of a second whenever necessary. This is done via the Haldex coupling, which is activated by an electro-hydraulic oil pump.

A control unit continually calculates the ideal drive torque for the rear wheels and controls how much the multi-plate clutch should be closed by activating the oil pump. The oil pressure increases the contact pressure at the clutch plates in proportion to the torque desired at the rear axle. So, the amount of pressure applied to the clutch plates can be used to continuously vary the amount of torque going between the front and rear wheels. If necessary, nearly 100 per cent of the drive torque can be directed to the rear wheels.

In addition to the Haldex coupling that acts as a longitudinal lock, four electronic differential locks (EDS) that are a function of the electronic stability control system act as lateral locks. The system briefly brakes a wheel that is slipping, enabling uninterrupted and stable transfer of drive power to the wheel on the opposite side. The Golf R is also equipped with the cross differential lock (XDS) at the front and rear axles. In the latest version, known as XDS+, this functionality is applied to a larger range of dynamic performance, making the vehicle more agile. When the car is being driven fast, brake pressure is applied to the inside wheel to restore optimal traction as soon as the electronics detect excessively light loads. XDS+ thereby operates as a transverse differential lock that compensates for understeer during fast cornering.

The new Golf R is equipped with ESC Sport as standard. The system is activated by a two-stage switch on the center console. When the driver presses this switch briefly, Electronic Stability Control (ESC) switches to the ESC Sport mode. In very fast driving with lots of bends, such as on a race track, the ESC system has a higher threshold. When the ESC button is pressed for longer than three seconds, the system is fully deactivated for high-performance driving on a track, a feature that is available only on the Golf R.

VW Golf R 2014_rear

 

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