9 September 2019

Toyota Announces New TNGA Small-Car Platform

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Toyota is extending the benefits of its TNGA (Toyota New Global Architecture) program to small cars with announcement of a new GA-B platform.

The TNGA philosophy has already delivered a step-change in the ride, handling and design of a series of new models since its debut with the current-generation Prius in 2016.

The GA-C platform for compact cars has also been deployed for the C-HR crossover and the new Corolla, both of which have earned media and public acclaim for their agility, responsiveness and styling.

The concept has proved similarly effective in larger sedans and SUVs, including the new Camry and RAV4, both of which are underpinned by the GA-K platform.

Now the focus is to elevate the design and driving performance of small cars with the GA-B platform.

Confident and natural

In common with the GA-C and GA-K platforms, the new GA-B platform is designed to deliver a confident and natural drive.

Several factors contribute to this, notably the engineering of a highly rigid underbody using advanced techniques to strengthen joints in the structure, while at the same time focusing on weight-saving and cost control.

The MacPherson strut front suspension features low-friction dampers and can accommodate different spring types. The platform allows for either torsion beam or multi-link rear suspension systems to be used, according to vehicle type and character.

The GA-B platform also positions the driver's seat low and back towards the centre of the car, helping lower the vehicle's centre of gravity. This also secures a more engaging driving position, together with a steering wheel that can be set close to the driver at an optimised angle.

Smart packaging and design freedom

The GA-B platform has been designed so that interior space can be maximised through smart packaging. The TNGA philosophy uses standardised components in out-of-sight areas, simplifying the vehicle design process without creating look-alike cars. Designers will have the freedom to give each new model a distinctive and individual look.

The hard points of the upper body and the driver's hip-point are set low, so there is more scope to create vehicles that have a low height and wide stance. Positioning the wheels at the corners of the platform and very short overhangs add to the visual appeal this generates.

Combining a long-wheelbase architecture and smart packaging ensures that interior space is not compromised, even with compact exterior dimensions.

Modular system

The GA-B platform's modular quality allows for it to be used with different vehicle wheelbase lengths, heights and track widths, giving designers and engineers the freedom create appealing new models of different sizes and body types.
 

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