POWERTRAIN SYSTEMS

Delphi Diesel Fuel Injectors
Delphi Diesel Fuel Injectors are a family of highly versatile
mechanical products that can be adapted for use in a wide range of
light duty, medium duty and heavy duty fuel systems for both direct
injection and indirect injection diesel engines. They are precisionengineered for both mechanically- and electronically-controlled
pump line nozzle systems. They can be configured in conventional
bar-type designs for axial-feed or side-feed, or forged body designs
for a variety of angled side-feed applications.
The nozzle valve of Delphi Diesel Fuel Injectors is mechanically
closed by a high stress-capable spring, and the opening pressure is
accurately set by high precision shims. Their proven, cost effective
technology and application flexibility provide manufacturers with
excellent value.
Low Spring Injector Features and Options:
Delphi offers a variety of diesel fuel injectors
• Valve spring positioned low in injector body for reduced
to meet a wide range of applications.
moving mass
• Holder body types: bar stock or forged construction
• Body diameters from 17 mm upward
• Compact profiles
• Direct injection (DI) engine and indirect injection (IDI) engine versions available
• Range of inlet and backleak configurations
• Start-of-injection sensor injectors
• Enhanced injection pressure option:
o Specifically developed to be compatible with electronic unit pump (EUP) systems operating at high
injection pressures
o May be installed within the cylinder head, connecting to the EUP with a purpose-made high
pressure line/connecting tube
o Injectors withstand operating pressures up to 2,000 bar
Nozzle Options:
• Multi-Hole Nozzles for Direct Injection Engines
o Long Stem Nozzle options available include:
Guide diameters from 4 mm to 6 mm
Various spray cone angles with injection hole configurations specifically tailored to individual
engine requirements
Outline to ISO standards more commonly with 7 mm or 9 mm diameter shank
Variety of seat profiles available to suit application requirements
Sac-type nozzles available with mini-sac or conical sac
Valve covered orifice (VCO) nozzles that contribute to low carbon emissions
Nozzle holes tailored to the engine application with hole diameters from 0.12 mm and with
options for hole form pre-conditioning and holes with conical form
o Long Stem Nozzles are available in two types:
Standard guide configuration
Extended guide configuration, which is important when space is limited or extreme injection
pressures are encountered

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