Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - VW quantifies MPG gain of 4- to 2-cylinder deactivation at 31 mph = +16 mpg

hancock · 04-07-2012, 04:05 AM

Interesting VW ACT technology, however, what about engine vibration frequencies with only two cylinders activated?

Also the engine big end bearings are designed to carry bearing loads for four cylinders so will what about wear on big end shell life on the cylinders 1 and 4 during deactivation?

The wear life of the deactivation mechanism? How many times in the average journey will it operate?

VW will have to re-assure buyers of the Polo Blue GT 1.4 L engine live or give a special warrantee?

04-07-2012, 04:05 AM	#16 (permalink)
hancock EcoModding Lurker Join Date: Apr 2012 Location: UK Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts	hancock Interesting VW ACT technology, however, what about engine vibration frequencies with only two cylinders activated? Also the engine big end bearings are designed to carry bearing loads for four cylinders so will what about wear on big end shell life on the cylinders 1 and 4 during deactivation? The wear life of the deactivation mechanism? How many times in the average journey will it operate? VW will have to re-assure buyers of the Polo Blue GT 1.4 L engine live or give a special warrantee?