Caitlin Duncan. Toyota. October 17th , 2017.
Just like the Prius, the PCU is lighter and more compact as a result of integrating microcontrollers and using a new power stack structure, allowing the unit to be packaged directly above the transaxle. This new design lowers the vehicle’s overall center of mass and allows for a lower hood height. Another key change to the PCU is a revised DC-DC converter (converts a source of direct current from one voltage level to another) that sees its control output optimized. including the conversion to AC power - - helping to reduce the vehicle‘s overall power consumption. What‘s more, the output filter for the DC-DC converter has been redesigned so that it is more dimensionally compact (improved packaging/weight savings) and produces less noise (reduced NVH).
Despite the increased use of high-tensile-strength sheet metal and hot stamping materials resulting in a lightweight body, further weight reduction has been achieved through the fitment of an aluminum hood, while new construction techniques have led to the use of thinner body panels for the roof, hood, trunk lid, front and rear doors and front fenders when compared with the previous model. Laser Screw Welding (LSW) has been incorporated at key junctures throughout the body/platform for increased joint rigidity. A special high-rigidity urethane adhesive has been applied to both the windshield and rear window where it meets the vehicle body that helps to realize increased body rigidity.
Building on the Camry‘s undisputed reputation as an extremely smooth and quiet car in its class, Toyota engineers incorporated a variety of new noise, vibration and harshness (NVH) countermeasures that were previously found exclusively on luxury models. These include sound absorbing/insulation through the fitment of a hood insulator and upper and lower fender separator. The passenger compartment is further insulated from the engine and road noise using foam/vibration dampening materials throughout the vehicle along with a thicker dash silencer mat across the entire interior firewall section. Furthermore, a special vibration-damping coating has been applied over a wider area of the underfloor, joined by noise-proofing material encompassing more surface area of the interior‘s ceiling. Wind noise has been suppressed through a newly-designed rain gutter molding and a reduction in the step at the bottom of the windshield.
The V-6’s VVT-iW variable valve timing system has been engineered to ensure high torque production at all engine speeds. It utilizes the Atkinson cycle to enhance fuel economy without sacrificing performance or engine start ability at extremely low temperatures as well as in wide-open throttle (WOT) engine operation. Fuel efficiency is further enhanced by decreasing pumping losses from the delayed closing of the intake valves. Both the 2.5-liter 4-cylinder Dynamic Force Engine and the 3.5-liter V-6 are equipped with the new Direct Shift 8-speed automatic transmission that allows the driver to freely experience the direct and impressive acceleration capability of the engines, along with the satisfyingly crisp-yet-smooth, quick-shifting capability of a performance-oriented gearbox. What‘s more, not only does this transmission deliver outstanding fuel economy, it also always operates within a calm and refined manner.
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