DENSO ECD-U2P Fuel Injection Pump Service Bulletin

The ECD-U2P system is a common rail system for diesel engines. The system consists of a supply pump, common rail, injectors, ECU, and EDU. The supply pump draws fuel from the fuel tank and pressurizes it to a high pressure, then pumps it to the common rail. The ECU controls the injection of fuel through the injector, monitoring the internal pressure of the common rail through the pressure sensor to verify that the actual injection pressure matches the injection pressure commanded by the ECU.

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DENSO Fuel Injection Pump ECD-U2P Service Bulletin | Manualzz

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Key features

  • High pressure injection
  • Independent control of injection pressure, rate, and timing
  • Reduced black smoke emissions
  • Cleaner exhaust gases
  • Higher power output

Frequently asked questions

The ECD-U2P system is a common rail system for diesel engines. It is comprised primarily of a supply pump, common rail, injectors, ECU, and EDU.

The supply pump draws fuel from the fuel tank, pressurizes it to a high pressure, and pumps it to the common rail. The fuel that is stored under pressure in the common rail is fed via the high-pressure pipe and injected at a high pressure (25 to 135 MPa) through the injector. The rate and timing of the fuel that is injected from the injector are determined by the length of time and the timing in which the current is applied to the injector by the EDU in accordance with the signals from the ECU. While the ECU controls the injection of fuel through the injector, it monitors the internal pressure of the common rail through the pressure sensor, in order to verify that the actual injection pressure matches the injection pressure commanded by the ECU.

The ECD-U2P system provides a number of benefits, including reduced black smoke emissions, cleaner exhaust gases, and higher power output. This system also complies with the exhaust gas regulations enacted the SETP3 European exhaust gas regulations.
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