Powertrain Systems

The Delphi E3 Diesel Electronic Unit Injector (EUI) is an advanced diesel fuel injection system for heavy duty applications. It features the same body profile as the class-leading Delphi E1 Electronic Unit Injector, plus a patented two-solenoid valve technology that enables the system to generate higher pressures at lower engine speeds.

The Delphi E3 EUI has two independent, fast response precision actuators that can change the injection pressure level (up to 2,500 bar) and adjust fuel delivery timing and duration on a per shot basis. This leap in technology gives the Delphi E3 EUI the unique ability to achieve full pressure control at low and high engine speeds. It gives pilot split main- and post-injection along with a rising pressure characteristic during these events, while competitive systems generally maintain or reduce pressure during injection.

Major features of the Delphi E3 Diesel Electronic Unit Injector include:

• 2,500 peak bar pressure injection
• Compact and lightweight body
• High-speed actuation
• Electronic pilot injection
• Individual injector electronic characterization
• Two-valve system within the injector body
• High-pressure post-injection
• Programmable shot-to-shot injection control
• Programmable variable nozzle opening and closing pressure

Benefits

• Helped manufacturers meet Euro III/IV and US 02/04 emissions standards; will be used to help them meet Euro V and US 07, with potential for US10
• Smaller installation envelope benefits engine designers
• Reduced response time
• Reduced noise
• Injection optimization for differing combustion systems
• Spill and nozzle control
• Smoke and particulate reduction
• Flexible end of injection (spill, pressure backed, combined)
• Split main injection (rate shaping)
• Programmable high-pressure overspeed range
• Helps improve fuel consumption and performance

Typical Applications

The Delphi E3 Diesel Electronic Unit Injector is designed for heavy-duty applications and provides the widest flexibility of injection characteristics, enabling optimized injection for differing combustion systems at all engine operating conditions.

Performance Advantages

The functionality of the Delphi E3 Diesel Electronic Unit Injector provides a major advantage for diesel engine manufacturers in the development of US07 and Euro V compliant engines. With optimized hydraulic performance and 1 million km durability (based on accelerated durability testing), the Delphi E3 EUI represents a significant leap forward in diesel fuel injection technology. 

The Delphi E3 EUI helps achieve extremely low smoke/particulate levels at any engine load and speed since high injection pressure can be generated across all operating conditions. The low smoke/particulate levels also help reduce the need for large and costly aftertreatment devices.

The reduced size of the Delphi E3 EUI frees up valuable space in the cylinder head providing greater flexibility for rocker and valve layout. The shorter fuel pumping route benefits the injector's hydraulic performance and achieves a more rapid response to signals from the electronic control unit, which has specially developed software and solenoid wave forms that provide full control of both actuators. Using engine sensor inputs, the exact injection parameters are determined to help achieve optimum emissions, fuel consumption, and performance.

Specifications

The Delphi Advantage

Delphi is an industry leader in diesel fuel injection technology and actively involved in the development of advanced diesel technology that can help vehicle manufacturers meet stringent emissions requirements while enhancing fuel economy and providing robust performance.  Extensive experience in high-pressure fuel injection technology has helped Delphi develop several strategies that provide cost-competitiveness, high-value, low noise and the ability to deliver accurate injection over the life of the vehicle.

Delphi has 15 diesel design and engineering centers located in Europe, Asia, North America and South America, and 21 diesel manufacturing facilities in 13 countries enabling exceptional on-time delivery.