Release

Tucson

2010.02.08 00:00:00 No. 30

POWERTRAIN
 

To further broaden its appeal, Tucson will get the Hyundai’s newest fuel-efficient engines and five-, six-speed manual and six-speed automatic transmissions.  Powertrain availability will vary according to region.

 

Customers in Africa and Middle East will be offered a choice of two thrifty and clean-burning petrol engines: the Theta-II 2.4 rated at 177ps and 23.1kg.m of torque which emits just 219  g/km of CO2 (4WD AT) and the Theta-II 2.0 delivering 166ps and 20.1kg.m of torque, further reducing CO2 to 206g/km(2WD MT).

 

The all-new R 2.0 diesel engine is the cleanest among the lineup producing CO2 emissions of just 174g/km (4WD MT).  This diesel engine achieves 7.5 liter per 100km fuel economy with maximum power output of 177ps and 40kg.m of torque(A/T).

 

Hyundai’s all new six-speed automatic transmission will be available for all engines while five-speed manual is only available with the Theta-II 2.0 and the six-speed manual is mated only to Theta-II 2.0 and R 2.0.

 

THETA-II

Hyundai engineers have taken the World Engine, the largest gasoline engine program in the world, and created the lighter, more fuel efficient and cleaner-running Theta-II.

 

The 2.0-liter Theta-II has shed over 10kg from its previous iteration.  For better fuel efficiency and reduced NOx emissions, Theta-II gets Dual CVVT (intake and exhaust camshaft phaser) while Theta-I is equipped with only intake CVVT.  Major improvements begin with the application of a two-stage Variable Intake System (VIS) which enables switching between long and short intake manifold resulting in an across-the-board performance increase.  To reduce internal friction, engineers have applied a Diamond-like-coating (DLC) to the top surface of the valve tappets resulting in improved fuel efficiency.  Engineers also expended considerable time and effort optimizing the oil pump pressure to achieve an ideal balance between durability and fuel economy. 

 

R DIESEL ENGINE

The R is the newest member of Hyundai's passenger diesel family joining the U (1.1, 1.4 and 1.6–liter), the A (2.5–liter) and S (3.0–liter V6).  In its initial 2-liter edition, R generates 184ps and 40kg.m of torque.

 

The R–Engine benefits from the third generation common rail system developed by Bosch whose piezo-electric injectors deliver fuel at 1,800 bar providing an unprecedented degree of accuracy and control.

 

It also features an electronically-controlled variable geometry turbocharger and an advanced engine control unit (air system-based charge control).

 

The R–Engine is fitted with a 16-valve dual overhead camshaft which is driven by an internal steel silent timing chain.  For reduced vibration and lower booming noise, the R gets a lower balance shaft which has been encased in a stiffened ladder frame housing for increased rigidity.  Weight-saving features include serpentine belt with isolation pulley, a plastic head cover, plastic intake manifold and plastic oil filter housing.

 

Developed by a 150-man team at an investment cost of 250 billion won, the R–Engine harnesses Hyundai´s newest and most advanced development tools.  Computational flow dynamics and structural and thermal analysis were used to optimize its design while computerized simulation of the die casting process was employed to achieve the optimal balance of strength and low weight.

 

Over 500 prototype engines were built during the 42 month–long development period which encompassed a wide variety of performance and emissions tests, endurance as well as NVH, cooling and lubrication studies.  Finally, the engine was installed in vehicles and subjected to exhaustive testing under all imaginable environmental conditions.

 

SIX-SPEED AUTOMATIC

Hyundai's all-new six-speed automatic transaxle helps the company meet its goals of improving fuel efficiency and reducing CO2 emissions.  Shifts are silky-smooth with an option of sporty-type, manual shifting through the Shiftronic which is also new to the Tucson.

 

Designed for transverse engine applications in passenger cars and SUVs, the new compact transaxle puts Hyundai into an elite class of auto manufacturers who have designed their own proprietary 6-speed automatic (after Toyota and a GM/Ford joint venture) demonstrating Hyundai’s advanced powertrain engineering capabilities.

 

The strength of the design is its totally unique layout which makes it smaller, more compact and lighter than any other 6-speed on the market today.

 

For the customer, the new six-speed promises a performance edge. In this application, it delivers a 12.2 percent gain in fuel economy (10.1km/l versus 9.0km/l) and is 2.5 percent quicker in zero to 100km/h acceleration times (7.8sec versus 8.0 sec).  It also delivers an 11 percent improvement in 60km/h to 100km/h overtaking performance (4.0 sec versus 4.5 sec).

 

Furthermore the unit is maintenance-free: the gearbox is not equipped with a dipstick as it is filled with an automatic transmission fluid that is good for the life of the vehicle thereby reducing maintenance costs.

 

Developed over a four-year period, this new six-speed automatic is 12kg lighter than the five-speed it replaces.  It also is 41mm shorter and considerably simpler having 62 fewer parts, which is a key to increased durability, lighter weight and lower cost.

 

When it comes to gearsets, more is definitely better.  The addition of a sixth gear enables closer spacing between gear ratios providing a better balance of performance and fuel economy while the wide overall gear ratio helps deliver strong acceleration.

 

The gearbox has three planetary gearsets whose hallmark is simplicity of design and a unique flat torque converter which shortens the unit's overall length by 12mm.  Four pinion differentials improve durability and further minimize size.

 

Another example of engineering ingenuity is to be found in the design of the hydraulic pressure control unit.  Because there are always slight manufacturing deviations from one solenoid valve to the next which cause fluctuation in the hydraulic pressure and affect shift precision and quality, the transaxle features cleverly integrated adjustment screws in the valves which enable each of the eight valves to be calibrated at the factory.   

 

This novel feature ensures stable hydraulic pressure at any shift point which facilitates a high degree of precision and control needed to deliver ultra-fast, smooth and precise shifts throughout the rpm range.

 

SUSPENSION

The multi-link rear suspension was adopted not only for its superior ride and handling characteristics but also because of its compact design which minimizes intrusion into the cabin creating extra space for passengers and cargo.  Tried and true MacPherson struts are employed for the front suspension set-up.

 

 

SAFETY INNOVATIONS

Particular attention has been paid to increasing the stiffness of the front side members which have been enlarged and straightened.  Also, the center pillars serve as the anchors of new ring structure which improves overall side structure stiffness while also creating more room for the door armrest and seat.

 

The entire body shell has been made stiffer and lighter thanks to its more extensive use of ultra-high tensile strength steel which comprises 68.9 percent of the shell compared to its predecessor's 57.3 percent.  Also, the use of Tailor Welded Blanks has been expanded on key structural members.  TWB assemblies combine steels of different thickness and grades using a sophisticated laser welding and stamping process achieving an optimal stiffness-to-weight ratio.  TWBs reduce body weight while enhancing crash energy management.  Compared to its predecessor’s 407.9kg, the new body shell weighs just 385.2kg, for an impressive weight-saving of 22.7kg.

 

Extensive work was done to isolate sounds and eliminate vibrations. Tucson is discernibly quieter both at highway speeds and at engine idle.  Booming noise is reduced thanks to a sub-frame dynamic damper while the rear luggage area gets extra soundproofing to isolate exhaust sounds.  Road noise has been minimized by improving stiffness in the front and rear struts, rear trailing arm and the spring sheet.

 

In a panic braking situation, the emergency flash signals are automatically triggered thus reducing the risk of rear-end crashes.  In the unfortunate event of a rear-end collision, active headrests are triggered by the pressure of the seat occupant’s weight on the backrest, the headrests automatically moving upwards and forwards to help prevent injuries to head, neck and upper body.

 

In addition to 4WD capability (optional), Tucson's CUV credentials are strengthened with two new safety features:  Hillstart Assist Control and Downhill Brake Control which promote safer travel up and down steep slopes.

 

For safer maneuvering in reverse gear, a rear-view camera has been added.  Shifting into reverse gear automatically turns on the rear-view camera which provides a wide-angle view of the rear on a 3.5-inch color LCD built into the rear-view mirror thus reducing the risk of accidents.  The rear-view mirror is autochromic which means it automatically dims during night-time driving to reduce the glare of the headlights from vehicles behind.

 

Side mirror housings have been modified to reduce wind noise and also feature an integrated repeater lamp for improved visibility.  At the flick of a switch, the foldable mirror housings dip inwards to reduce the overall width of the vehicle.

 

Innovations extend to the side glass weather-stripping which now features a water dam.  This not only enlarges the side glass view but also safely channels rain water to maximize visibility.

 

COMFORT and CONVENIENCE

Anti-pinching power window (driver's seat only) provides an extra touch of safety.

 

The Heating Ventilation and Air Conditioning (HVAC) system has been upgraded with a new blower and dual temperature controls for the driver and front passenger.  Winter or summer, the desired cabin temperature can be reached quicker with the new air blower.  The new design draws on a mix of outside/inside air for faster cooling down and warming up.  The automatic control of the temperature has been made more precise thanks to the use of new and improved sensors.  A cluster ionizer has also been included to combat the build-up of mildew and fungus which cause unpleasant musty odors.  It generates ion plasma that ensures the HVAC system blows the cleanest, freshest air throughout the life of the vehicle.

 

Other new features include:

 

+Push button start with smart-key proximity sensor

+Foot Parking Brake for LHD A/T

+Steering wheel-mounted audio remote control

+18” wheels

 

AVAILABILITY

The Tucson will be built in three factories on two continents.  Mass production of the Tucson has already started at the Ulsan factory for the Korean domestic market, North America and the general market (all countries outside of EU and greater Europe).

 

The Kia Motors factory in Zilina, Slovakia will build the Tucson starting in the first quarter of 2010 (R engine and Theta-II).

 

The Tucson will also be built by Beijing Hyundai to meet demand in China.

 

 

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