Common Rail Injector

Common Rail Injectors

• First Generation Injectors– Solenoid Type

• Bosch• Denso

First Generation InjectorsBasic principle Denso

First Generation InjectorsTimeline

First Generation InjectorsX2

Specifications:-135MPa

-Pilot Injections

Compensation:-Non

-Resistance

First Generation Injectors

Common Rail Injectors

• Second Generation Injectors– Solenoid Type– ECU Coding

• Delphi Diesel • Denso • Bosch

Second Generation InjectorsG2

Specifications:-180MPa

-Multiple Injections

Compensation:-Non

-Resistance

-QR Code

Denso

Specification

•1600bar•Multiple Injection•16 digit alphanumeric C2i code

Second Generation Injectors

Second Generation Injectors

Common Rail Injectors

• Third Generation Injectors– Piezo Crystal

• Delphi Diesel• Denso• Siemens• Bosch

BasicSpecs:

-In the cylinder head

180 MPa

Number of injection holes:

Type:Piëzo

Number of injections:5

10

Piezo Injector

Piezo Injector

Piezo elements

Electrode

Piezoelectric Element

Laminated

Construction

Piezoelectric Element

Piezo Injector

3 Way Valve

Piezo Stack

Hydraulic Movement Structure

Needle Back Pressure( Operation Room

Working principle

Piezo injectorWorking

principle