Абе предадоха се, защото 1-во защото при Common rail има по-пълно изгаряне, което е равно на по-малко вредни емисии. 2-ро защото Comman rail e по-прост, съответно, по-лесен (евтин) за обслужване.
BTW, PD мотор с 310nm въртящ момент са ASZ моторите. ATJ са по-малко.
VW Common rail мотор е средно с около 0,3л по-икономичен, от VW PD мотор. Сравнението е между 2.0 TDI PD и 2.0 TDI CR. И двато мотора са 140к.с
History
The common rail system prototype was developed in the late 1960s by Robert Huber of Switzerland[1] and the technology further developed by Dr. Marco Ganser at the Swiss Federal Institute of Technology in Zurich, later of Ganser-Hydromag AG (est.1995) in Oberägeri. In the mid-1990s Dr. Shohei Itoh and Masahiko Miyaki of the Denso Corporation, a Japanese automotive parts manufacturer, developed the common rail fuel system for heavy duty vehicles and turned it into practical use on their ECD-U2 common-rail system mounted on the Hino Rising Ranger truck and sold for general use in 1995[2]. Denso claims the first commercial high pressure common rail system in 1995 [3].
Modern common rail systems, whilst working on the same principle, are governed by an engine control unit (ECU) which opens each injector electronically rather than mechanically. This was extensively prototyped in the 1990s with collaboration between Magneti Marelli, Centro Ricerche Fiat and Elasis. After research and development by the Fiat Group the design was acquired by the German company Robert Bosch GmbH for completion of development and refinement for mass-production. In hindsight the sale appeared to be a tactical error for Fiat as the new technology proved to be highly profitable. The company had little choice but to sell, however, as it was in a poor financial state at the time and lacked the resources to complete development on its own.[4] In 1997 they extended its use for passenger cars. The first passenger car that used the common rail system was the 1997 model Alfa Romeo 156 1.9 JTD,[5] and later on that same year Mercedes-Benz C 220 CDI.
Common rail engines have been used in marine and locomotive applications for some time. The Cooper-Bessemer GN-8 (circa 1942) is an example of a hydraulically operated common rail diesel engine, also known as a modified common rail.
The engines are suitable for all types of road cars with diesel engines, ranging from city cars such as the Fiat Nuova Panda to executive cars such as the Volvo S80.
http://en.wikipedia.org/wiki/Common_rail