EUI Repair

Service Centre

EUI Repair

The Electronic Unit Injector (EUI) market is a diverse and challenging sector therefore Merlin Diesel is committed to researching and providing technologies inline with customer demand. From the latest advances in main manufacturer equipment to developing our own platform for HEUI Caterpillar/Navistar/Ford; Merlin’s dedicated and ever expanding capabilities in this field ensures we have the equipment or services to meet the challenges that this sector demands.Our service exchange program is wide ranging and is constantly being updated.
Our test and report service is efficient and professional, offering expert advice within 24 hours of receiving a customer unit.

Test Equipment

AVM-PC 2 x 1:

For official re-calibration of all Delphi EUI and SMART applications

Bosch EPS 847:

For official re-calibration of all Bosch EUI/EUP applications

Technical Data

An EUI comprises an individual camshaft driven plunger pump for each cylinder which is capable of delivering fuel at very high pressures (up to 2000 bar). These high injection pressures are absolutely essential to enable engines to meet current and future emissions legislation. The actuator is a solenoid controlled valve which is operated by signals from a microprocessor. The EUI system incorporates full electronic control with pilot injection being employed to reduce noise. At the same time, sensors around the engine feed a continuous stream of data to the ECU which calculates the exact amount and timing of fuel injected.

Due to the complex nature of the Electronic Unit Injector and the extremely high operating pressure within the system, in the past, the only service option was to replace the entire unit with a new or factory re-manufactured unit. Repair was not possible, as the traditional workshop equipment and environment was not suitable for the task.