Representative companies which develop CRDI ( Common Rail Direct Injection ) engine and is supplying is Bosch and Delphi worldly. Firstly, Bosch is the first company which develop Common rail system with Benz together. Bosch is evaluated that have a technology that go first so much
Delphi didn’t have a technology originally but got a connection technology undertaking France's Rucas. In fact, the United States of America is a country that diesel car does not develop because gasoline car is universalized constitutionally. Europe is a reader region about diesel technology.
Siemens VDO and Denso have a Common rail technology too. Siemens VDO’s technique is formidable. it is a company which develop injection system of Piezo method that is a next generation Common rail (Currently, is used mostly solenoid method as 2 generation)
Injection system of Piezo method is possible injection by ultra high pressure. Currently, domestic Common rail car is solenoid method that injection pressure is below 1,600 bar, the 3 generation Piezo Common rail can generate up to 1,800 bar. usually generation is divided by injection pressure and It fits that 3 generation Common rail is more than 1,800 bar.

1st generation : 1,350~1,400bar(solenoid injector)
2nd generation : less than 1,600bar (solenoid injector)
3rd generation : more than1,800bar (Piezo injector)

Bosch and Delphi model are the most in domestic Common rail vehicles

<Bosch>
1st generation: D-Eng.(2,000cc) : Santafe, Tucson, Trazet XG, X-trek
2nd generation: A-Eng(2,500cc) : Starex, Sorento, Porter 2
Tata daewoo commercial vehicle NOVUS(Heavy truck)

<Delphi>
1st generation: J-Eng.(2,900cc) : Terracan(145HP), Carnival, Bongo3
2nd generation: D27DT Eng.(2,700cc) : New rex(170HP), Rodius(165HP)
2nd generation: 2,900cc Terracan(165~174HP)

<Others>
Denso common rail system : HMC e-County, e-Mighty 2.5Ton/3Ton
Daewoo bus royal hitech

For reference, in the case of tera room, first model was 1st generation, but changed to 2 generation by increasing injection pressure 1,600 bar not long ago(Multec is the trademark of Delphi Common rail)

A lot of European cars use common rail system. Almost of Benz is applied and the Benz that is sold in the Korea is SMART, E-CLASS, A - CLASS, C ? CLASS, M-CLASS and is applied Bosch products.

A lot of BMW as well as Audi, Volkswagen, Renault, Peugeot/Citroen, Fiat
use common rail system too.

The European companies use various company's injection system and prefer Delphi, Siemens VDO, Bosch etc.

The following is companies which is applying Delphi Common rail.
The companies are PAS Peugeot Citroen, Renault Ford, HMC, KIA, SSANGYONG, Isuzu.
In Case of Toyota, is installing Denso’s.

Despite there is Delphi in USA, Common rail system is hardly used in the country. Because gasoline price is cheap, and Diesel car is inferior to gasoline car in comfort, noise.

For reference, VGT car is not related to Common rail, but if it combines with Common rail system, there is excellent improvement of performance effect