Daihatsu Move Teardown (Part 2): High fuel economy and improved performance
Turbo engine and CVT with 3-shaft gear train has lightweight and compact design
The Daihatsu Move teardown was held on January 21 through 27, 2015, by the Hiroshima Industrial Promotion Organization. The Part 1 of the teardown report (No. 1378 posted on February 19, 2015) focused on equipment and components comparable to those in B-segment cars. Part 2 focuses on the engine and transmission fitted in the fifth-generation 2014 Daihatsu Move X-turbo VS model (see Note).
The turbo engine of the fifth-generation Daihatsu Move is based on a long-stroke engine and fitted with one of the smallest turbochargers in the world (supplied by IHI). The engine provides good responsiveness, powerful torques in low- to mid-ranges, and high fuel economy. The aluminum engine block features a carefully design rib reinforcement for extra rigidity to reduce noise and vibrations while achieving substantial weight reduction. This block, plastic intake manifold, throttle body and other components were developed to make the Daihatsu Move the lightest car in class. Nearly a decade has passed since its debut in 2006 and the Move is still leading the highly competitive mini vehicle market.
The Move is fitted with Daihatsu's proprietary CVT as detailed later in this report. A planetary reduction gear with forward and reverse switching mechanism is located on upper-stream of the belt and pulley transmission unit. This design has made it possible to reduce the number of gear shafts from four as in the conventional CVT to only three. This leads to reducing the unit in weight and size. In addition, the speed reduction function of the planetary gear reduces the rotation speed of the CVT belt and pulleys. This helps reduce friction loss, which, in turn, improves fuel economy.This report focuses on the turbocharged engine and the CVT unit used in the Move.
(Note)：The fully-redesigned Move (sixth-generation Move) was launched in December 2014.
Previous teardown reports:
Daihatsu Move (Feb. 2015)
Toyota Aqua (Nov. 2012)
Specifications of the 2014 Daihatsu Move
|Vehicle specifications||Model name/Grade||Daihatsu Move X-turbocharged VS grade,
special version with Smart Selection SA (Smart Assist)
|Price||JPY 1.33 million plus JPY 60,000 for optional Smart Assist|
|Dimensions||Length: 3,395mm, Width: 1,475mm, Height: 1,620mm|
|Engine||KF-type water-cooled inline 3-cylinder intercooled turbocharger|
|Transmission||CVT with a torque converter and lockup mechanism|
|Fuel efficiency (JC08 mode)||25.20km/liter|