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2009 Cadillac CTS Arrives Shortly - (UK) - ...Continued
August 7th, 2008
Refined, stiffer unitary bodyshell ensures solidity, quietness and crashworthiness
An exceptionally strong unitary bodyshell structure plays a key role in delivering the smooth ride, precise handling and quiet, refined driving characteristics of the 2009 Cadillac CTS. The new bodyshell is a stiff structure with strategically placed enhancements that help provide world-class crash protection, a sharper driving feel and improved suppression of noise, vibration and harshness (NVH).
The all-new magnesium instrument panel bulkhead is a lightweight, single-piece, cross-car structure that bolsters both the side-impact and frontal crash performance. Its design provides exceptional stiffness that also helps reduce NVH that can be transmitted through components attached to the bulkhead.
Seven further transverse cross members made of fabricated steel are integrated into the floor pan, designed to manage crash energy and contribute to the vehicle’s overall stiffness.
Exceptionally strong Martensite steel is used on the inner and outer side sills to enhance occupant protection in a side-impact crash. High-strength steel in the B-pillars and a double application of high-strength steel in the windscreen header rail enables the CTS to meet 2010 roof crush requirements in North America.
Comprehensive analysis and engineering throughout the 2009 CTS development programme targeted interior sound levels found in elite prestige luxury saloons.
Engineers also focused on tuning the quality of the remaining sound, including – in some cases – adding to sound levels. For example, a perforated pattern has been added to the inside of the tailpipes to increase resonance, adding more pleasing, low-frequency sounds to counteract high-frequency noise. Meanwhile inside the cabin, tones were added to a few otherwise-silent switches and controls. Also, the bonnet includes sealing techniques normally used on vehicle doors to enable greater noise and vibration control.
As a result of this extensive and painstaking research, the 2009 CTS is expected to be one of the quietest, most acoustically refined saloons on the market. In fact, the CTS has an outstanding acoustic sensitivity of only 2 decibels (dB) from chassis source and an equally impressive wind noise rating of 36 dB.
Direct injection and VVT technology
The new Cadillac CTS is available in the UK with a choice of two powertrains. The standard engine is a 2.8-litre V6 petrol unit with variable valve timing (VVT), which generates 211 ps at 6,800 rpm and 246 Nm of torque at 6,300 rpm. This power unit is an all-aluminium, 60-degree V6 with a DOHC per cylinder bank and four-valves-per-cylinder.
For customers in search of more performance, the 2009 CTS can also be ordered with a new 3.6-litre V6 petrol engine that combines greater power with smoothness, efficiency and technical sophistication. Fitted with direct injection and VVT, this engine produces 311 ps at 6,400 rpm and 374 Nm of torque at 5,200 rpm.
The six-speed automatic transmission offers drivers a choice of fully-automatic operation or Driver Shift Control sequential manual gear shifting (with paddle shift on the 3.6 model).
Next year, a state-of-the-art, direct-injection turbo-diesel engine will become available. This sophisticated V6 diesel will have a displacement of 2.9 litres, an estimated output of 250 ps and will produce around 550 Nm of torque from 2000 rpm.
The VVT system in both engines employs four-cam phasing to continuously change the timing of valve operation as conditions such as rpm and engine load vary. The result is linear delivery of torque, with near-peak levels achieved over a broad rev-range. In the 3.6 this results in GM’s highest specific power output V6 (86.4 ps-per-litre), without sacrificing overall engine response and driveability.
Cam phasing pays big dividends in reducing exhaust emissions so effectively that new CTS can do without exhaust gas recirculation (EGR) and air injection reaction (AIR). As well as achieving the dramatic 25% reduction in cold-start hydrocarbon emissions, the CTS engines surpass all European emissions regulations.
Extensive global test and development achieves sportscar handling
Cadillac’s development team were set goals to achieve near sportscar levels of grip and handling, while also emulating the dynamic poise and ride smoothness of prestigious luxury cars.
CTS prototypes were extensively developed and tested at Germany’s Nordschleife circuit at the Nürburgring and on city streets and country roads across Europe and China, as well as North America.
The 2.8 V6 features a firm but compliant sports suspension set-up while the 3.6 V6 is fitted with suspension tuned for higher performance, more spirited driving – each tuned for the specific ride and handling requirements and road conditions of the European market. The 2009 CTS has a weight distribution close to the optimal 50-50 front-rear, while aluminium components reduce unsprung weight and contribute to more precise dynamic wheel control.
Complementing the independent double wishbone front suspension is a tower-to-tower bracing bar that adds cross-vehicle stiffness for optimised steering feel. The front shocks are monotube dampers from Bilstein that provide highly responsive damping while new CTS also features increased roll-centre height, castor angle increased by one degree, lower-friction ball joints and revised bushing rates over its predecessor.
A fully independent multilink rear suspension with isolated, 40% stiffer subframe on four rubber mounts provides maximum tuning flexibility and enables a superior ride/handling compromise to be achieved. The 2.8 V6 models are fitted with monotube Bilstein shock absorbers, while 3.6 V6 models have Nivomat self-leveling shock absorbers, which adjust automatically to different loads and road conditions. Both models are fitted with a limited-slip rear differential.
A high performance, all-disc braking system with ABS and traction control is standard. Large diameter, ventilated discs are fitted, front and rear, with cast iron callipers and twin, 42mm pistons (front) and single 45 mm pistons (rear). New CTS employs an electric push-button parking brake.
As expected on a premium luxury sport saloon, the 2009 Cadillac CTS features numerous electronic chassis and engine control systems that are designed to help the driver maintain a safe course in all driving conditions, including StabiliTrak®, GM’s electronic stability control system, dynamic rear brake proportioning to optimise stopping distances, and hydraulic brake assist to develop additional brake pressure in emergency situations.
A further key safety feature is GM’s Adaptive Forward Lighting system for the bi-xenon HID headlamps, which automatically adjusts headlamp direction for improved nighttime driving visibility. The system turns the headlamps up to five degrees inboard and up to 15 degrees outboard on each lamp. Safety is also enhanced by automatic rain-sense windscreen wipers with heated windscreen washer system and a rear park assist system.
All-new integrated digital music and navigation infotainment system
The CTS integrates the very latest technologies in in-car entertainment and navigation. Music is delivered through a 300 watt 10-speaker Bose® 5.1 Cabin Surround® sound system, which features Neodynium (Nd®) woofer and sub-woofer assemblies. The audio system was extensively engineered for the digital music age with Bose® Automotive, with whom Cadillac has worked closely for over 25 years.
Uniquely, thanks to the direct involvement of Apple® engineers, full iPod® integration means that playlists appear on the car’s retractable eight-inch touch-screen VGA display, steering wheel controls can be used to advance tracks, and devices can be charged in the cabin.
A 40-gigabyte hard drive stores music from digital music players and CDs, and its digital audio recording capability means listeners can pause and rewind radio broadcasts. Music recognition software is incorporated in the hard drive, enabling it to recognise track listings, song titles, genres and artist info for CDs or stored digital music.
The infotainment system also features a DVD/CD player with MP3 file compatibility, and a TV tuner provides further viewing pleasure for occupants when the vehicle is parked.
The hard disk drive (HDD) navigation system exploits the latest advances from the industry, creating a more informative package, 30% quicker route calculations and 3-D imaging of maps. It also compatible with TMC, a continuously transmitted traffic update alert system, which informs drivers of road congestion in real time.
The full infotainment package, including the navigation system, boasts an intelligent voice activation system on the 3.6 model.
Safer for occupants and pedestrians
The 2009 CTS is designed to enhance Cadillac’s reputation for providing safe occupant environments in luxury vehicles, including innovative new developments.
The new Pedestrian Protection system, for example, senses a collision with a pedestrian through front bumper sensors and activates a mechanism that lifts the bonnet to create additional clearance to hard points in the engine compartment, reducing the severity of the impact to the pedestrian's head. This vehicle system complies with all EU safety regulations and is designed to sense and discriminate collisions with a pedestrian at vehicle speeds ranging from 16 to 28 mph.
Another industry-leading safety feature is the front passenger airbag that features next generation ‘dual-depth’ airbag technology. This single airbag deploys in one of two sizes and one of two inflation pressures determined by the front passenger seat position, seat belt use and crash severity. This capability means a dual-depth airbag is deployed in a configuration more tailored to the specific emergency situation than conventional or dual-stage airbags.
GM’s Adaptive Forward Lighting system for the bi-xenon HID headlamps automatically adjusts headlamp direction for improved nighttime driving visibility. The system turns the headlamps up to five degrees inboard and up to 15 degrees outboard on each lamp.
Safety is also enhanced by automatic rain-sense windscreen wipers with heated windscreen washer system and a rear park assist system.
Further details include:
* Dual-stage driver and innovative dual-depth front passenger air bag
* Driver and front passenger seat-mounted pelvic/thorax side air bags
* Roof-rail-mounted full length side curtain air bags
* Front seat belt pretensioners
* Tyre pressure monitoring system
* Bodyshell structure with strategically placed high-strength steel
Early promise of success – fulfilled
When the new CTS went on sale in the USA in September 2007, it triggered strong demand from luxury consumers (sales went up 59%) and received critical acclaim across the board. Motor Trend magazine chose the new CTS as its ‘2008 Car of the Year’ award winner, Car and Driver magazine selected new CTS for its ’10 Best List’ and the new Cadillac was short-listed for the North American Car of the Year award.
The CTS has also won safety awards in the US for its crash test performance and for fitting Cadillac’s Stabilitrak® electronic stability control system as standard on all models.