VW Polo Teardown (Part 2)

1.2-liter Turbocharged Direct Injection (TDI) diesel engine and suspensions



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 As reported earlier in "VW Polo Teardown (Part 1) Engine compartment and driver's seat area" (No. 1354 posted on December 2, 2014), the VW Polo teardown was performed on November 5 and 6, 2014. It was co-organized by the Saitama Industrial Development Corporation and Japan Auto Parts Industries Association. This second report focuses on the 1.2-liter TDI diesel engine and front/rear suspensions.

 The 1.2-liter TDI diesel engine employs a variable nozzle turbocharger with an air-cooled intercooler to deliver high torques from low engine speed ranges. The engine uses common-rail type direct fuel injection, electronically controlled swirl control, electronically controlled exhaust gas recirculation (EGR), and oxidation catalyst with diesel particulate filter (DPF) to meet Euro 5 emission standards for cars in Europe. The VW Polo has strut type suspension in the front and the torsion beam type suspension in the rear. These suspensions have been used for years on the VW Golf and Polo. They are reputed for use on front-wheel drive vehicles in C and smaller segments around the world. The vehicle used for the teardown event was the 2012 British model of the VW Polo fitted with a 1.2-liter diesel engine and not sold in Japan.

Past teardown reports:

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

 (Part 2) Drive unit and supercharger

Honda Accord Hybrid (Feb. 2014)
 (Part 1) Sport Hybrid i-MMD PCU and vehicle
              chassis components

 (Part 2) Sport Hybrid i-MMD Battery components
              and electric servo brake system

 (Part 3) Sport Hybrid i-MMD drive unit

Honda Fit Hybrid (Dec. 2013)
 (Part 1) Battery components & 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) Body cutaway (Nov. 2012)

Main specifications of VW Polo (2012 British model)

Vehicle VW Polo 2012 British model (right-hand drive)
Dimensions Length: 3,970mm, Width: 1,682mm, Height: 1,462mm, Wheelbase: 2,470mm
Vehicle weight 1,132kg
Fuel efficiency (NEDC) Combined: 26.3, Urban: 21.7, Extra-urban: 30.3 (km/liter)
Diesel engine 1.2-liter inline 3-cylinder (intercooled direct-injection turbo engine),
compliant with Euro 5 emission standard,
DOHC 12-valve, compression ratio: 16.5,
maximum output: 55kW (75PS)/ 4200rpm, maximum torque: 180Nm/ 2000rpm
Transmission 5-speed manual transmission
Price GBP 13,634  (London, U.K.)
Plant name Uitenhage plant, South Africa

Source: Compiled by MarkLines based on "2014 Vehicle Teardown Study Group Data" issued by the Saitama Industrial Development Corporation and Next Generation Automobile Industry

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