5. Technical Information
Injector Test
Defected Injector
no classification and re-labeling
Process for Re-manufacturing Injectors
Repair
Delivery
Production
Injector labeling
Data input
Fitting the injector
Code readout
Engine manufacture
Data record
Vehicle manufacture
ECU programming with IMA data
ECU
Injector Manufacture
Class 1 2 3
Injector Test and classifications
Process for Manufacturing Injectors
Compensation of injected-fuel-quantity
New functions are added to common-rail systems to enhance the high precision of the fuel-injection system further, and ensure
them for the service life of the vehicle. With injector delivery compensation (IMA), a mass of measuring data is detected for each
injector during the injector manufacturing process. The data is then affixed to the injector in the form of a data-matrix code. This
data is transferred to the ECU during vehicle production. While the engine is running, these values are used to compensate for
deviation in metering and switching response.
But Incase of re-manufactured injectors( for in-use car service), it is almost impossible to classify control and label due to
technical limitation as remarked as below.
- Mechanical wearing and increasing tolerance (even rest of all injectors) - There is no space for re-labeling on injector head
- Different regulation between new car and in-use car (no required) - Cost saving
- According to mileage of vehicle tolerance of all injectors are increased simultaneously (most of them out of control range).
The Injector Delivery Compensation system offers solutions to above situation. Thus using an unclassified repaired injector will not
influence engine performance or emission level in significant ways .
15
GDS