Sunday, October 11, 2009

2010 Mazda CX-7 Facelift #2


New equipment added to the facelift leaves nothing to the imagination. A rear-view camera system helps the driver park and drive safely in reverse, and a Rear Vehicle Monitoring (RVM) system alerts the driver when a vehicle is approaching from behind or driving in the blind spot. The all-new navigation system with TFT colour display can be controlled with buttons on the steering wheel. It is easy to read and stores its data on a Secure Digital (SD) card (depending on market).
Bluetooth® technology has been expanded for Mazda CX-7 facelift, which not only allows hands-free use of Bluetooth® equipped mobile phones, but also lets passengers play music from a wireless MP3 player on the car's audio system. The driver can control the player using either the audio panel or the buttons on the new steering wheel. MP3 players can also be played on the car's audio system by plugging them into the AUX jack in the centre console box.
Mazda CX-7 facelift now offers customers in Europe two All-Wheel Drive, powertrains to choose from. New to the line-up is Mazda's new-generation 2.2-litre common-rail turbo diesel that combines high power and torque with low fuel consumption and emissions. Still available is the extremely sporty 2.3-litre turbo petrol engine with direct injection.
The lively MZR-CD 2.2-litre common-rail turbo diesel produces 127 kW/173 PS at 3,500 rpm and a massive 400 Nm of torque at just 2,000 rpm. It accelerates the Mazda CX-7 facelift in 11.3 seconds from 0 to 100 km/h and allows a top speed of 200 km/h. A newly developed variable-geometry turbo charger and a special intercooler that has been optimized for the Mazda CX-7 facelift contribute to quick, powerful response at engine speeds as low as 1,600 rpm.
The common-rail system optimises combustion for high efficiency. It maximises fuel injection pressure, using a special fuel pump and 10 very small (0.119 mm) injector holes, to achieve injection pressure of up to 200 MPa, one of the industry's highest. This allows very precise injection timing, which engineers used to optimize the number of injections per cycle and to control the amount of fuel sprayed into the combustion chamber.
The Mazda CX-7 facelift with the MZR-CD 2.2-litre turbo diesel is not only exciting to drive, it's also frugal at the pump for such a sporty SUV with so much room and versatility. It needs just 7.5 litres of fuel per 100 km (combined) by employing a low compression ratio of 16.3:1 (for a compact SUV), a small turbo charger, improved intercooler efficiency and special gear ratios. It also uses highly responsive injectors that achieve a minimum injection interval of just 200 μs, which makes injection about 30 percent faster, and allows strict control over the amount of fuel used during injection.
The MZR-CD 2.2-litre turbo diesel complies with Euro Stage V emission standards and is combined with the latest Mazda exclusive exhaust-gas treatment technology. Its newly-developed diesel particulate filter (DPF) is made from a ceramic material with high thermal resistance that includes a special Mazdadeveloped catalyst. The catalyst uses oxygen stored in the base material, in addition to the oxygen present in exhaust gases, to improve combustion of soot emissions. By increasing the volume of oxygen, this system makes regeneration of the filter faster and more efficient. In fact, Mazda CX-7 facelift's DPF needs to regenerate (in the NEDC mode) only half as often as conventional systems, and each regeneration process takes only a third as long. After exhaust gases have been purified of particulate matters, they pass through Mazda's newly-developed Selective Catalytic Reduction (SCR) system to significantly lower NOx.
The petrol version of the Mazda CX-7 facelift inherits the original model's acclaimed MZR 2.3-litre DISI Turbo engine. Its direct-injection technology has a host of advantages over intake manifold petrol engines. Torque is about 10 percent higher at 3,000 rpm, because of the cooling effect caused by injecting petrol directly into the combustion chamber. For the Mazda CX-7 facelift, the DISI petrol is improved even further. Its piston crowns now have a dish-shaped cavity that improves the air-fuel mix and contributes to better combustion during engine warm-up. Fuel is now injected not only during intake, but also during the compression stroke for a richer mix around the spark plugs and increased combustion stability. The MZR 2.3-litre DISI Turbo produces 191 kW/260 PS at 5,500 rpm and a high maximum torque of 380 Nm at a low 3,000 rpm. It responds quickly to pedal movement, accelerates the Mazda CX-7 facelift in 8.2 seconds from 0 to 100 km/h, and allows a top speed of 211 km/h.
Both engines feature a manual six-speed transmission with a compact three-shaft design carried over from the original model. It has triple-cone synchronizers for first, second and third gears, and a double-cone synchronizer for fourth gear, to deliver smooth and precise shift characteristics. It uses low-viscosity transmission fluid for easy shifting, even when the engine is cold. The diesel's sixth gear ratio has been configured as overdrive for maximum fuel efficiency.
The body shell of the Mazda CX-7 facelift is more rigid than the original model, and delivers improved ride comfort and even better handling stability. The suspension system is specially tuned for each engine to provide predictable linear handling and the same superior straight-line stability the original model is known for. Coupled to Active Torque-Split All-Wheel Drive, this updated chassis makes the Mazda CX-7 facelift sporty and nimble.
Mazda CX-7 facelift inherits the passenger-car-like MacPherson strut front and multi-link rear suspensions from the original model, refined for the facelift to deliver even more linear handling and performance feel. New dampers are introduced that give a smoother suspension stroke and improves straight-ahead stability and ride comfort. These supplement the front suspension's ball-type struts with low friction bearings, strong lateral force control springs, and six rubber mounting points. An enlarged castor angle is also used to optimise straight-line stability, while delivering excellent road feedback and grip when cornering. The rear suspension also gets new dampers and is specially tuned for the facelift. Its geometry ensures that the wheels suffer minimal camber change and maintain their near-vertical position even when cornering hard, which is vital to a high-torque, high-performance vehicle like this.
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