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

2015/03/02

Summary

Daihatsu Move Teardown

 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)
  (Part 1): Equipment comparable to B-segment cars

VW Polo (Dec. 2014)
  (Part 1):Engine compartment and driver's seat area
  (Part 2):1.2-liter TDI diesel engine and suspensions

Nissan Note (Sep. 2014)
  (Part 1):Major safety technology and advanced driver
               assistance systems

  (Part 2):Drive unit and supercharger

Honda Accord Hybrid teardown (Feb. 2014)
  (Part 1): PCU and vehicle chassis components
  (Part 2):Battery components and brake system
  (Part 3):Sport Hybrid i-MMD drive unit

Honda Fit Hybrid teardown (Dec. 2013)
  (Part 1) Battery components and brake system
  (Part 2) Engine and transmission

Toyota Aqua (Nov. 2012)
  (Part 1) Part suppliers and battery components
  (Part 2) Hybrid systems behind the 35.4km/liter car

Nissan Leaf
  (Part 1) Benchmarking systems and components (Mar. 2012)
  (Part 2) Main components disassembled (Sep. 2012)
  (Part 3) Nissan Leaf body cutaway (Nov. 2012)

Specifications of the 2014 Daihatsu Move

Daihatsu Move 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
Curb weight 820kg
Seating capacity 4
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