Powertrain Systems

Delphi Integrated Air⁄Fuel Modules (IAFMs) represent a systems approach to air/fuel control and measurement, consisting of an intake manifold and selected air/fuel components.  Integration of active tuning and mixture motion devices enables vehicle and engine manufacturers to realize improvements in engine power, torque, fuel economy and emissions performance.  In addition to the intake manifold, these modules can include:

• Fuel rail and injectors
• Electronic or mechanical throttle body
• Exhaust gas recirculation (EGR) valve
• Electronic actuators
• Canister purge solenoid
• Positive crankcase ventilation (PCV) valve
• Manifold pressure sensor
• Engine cover
• Associated brackets and fittings
• Integrated gaskets and seals
• Captured fasteners for simplified installation

Benefits

For standard Delphi IAFMs with aluminum manifold construction:

• High burst strength, excellent radiated noise behavior, high temperature resistance, and high stiffness for vibration-sensitive applications.

For standard Delphi IAFMs with vibration welded composite manifold construction:

• Less mass, lower cost, reduced thermal conductivity, and smoother flow path while meeting all safety requirements.

Both the standard aluminum and standard composite Delphi IAFMs feature pre-tested modules with integrated components, including captured fasteners and integrated gaskets and seals to help manufacturers simplify installation, reduce manufacturing time, and help improve reliability.

For Delphi IAFMs with active tuning:

• Variable runner length tuning or active plenum tuning provides torque enhancement over a broad range of RPM.
• Inlet port de-activation is closed at low RPM for high swirl in cylinder to improve fuel economy and emissions, and it is open at high RPM to increase airflow and improve power.
• Charge motion control valve is closed at low RPM for high tumble in cylinder to help improve fuel economy and emissions performance, and it is open at high RPM to increase airflow to help improve power.  The charge motion control is also a key enabler to meet California Air Resources Board (CARB) Super Ultra Low Emission Vehicles (SULEV) emissions requirements without an air pump.
• Electronic actuators with positioning sensing offer various actuator technologies to meet customer requirements, and non-contacting position technology for accurate, reliable, and durable position sensing.

Typical Applications

Delphi makes IAFMs for passenger cars and light duty trucks, motorcycles, marine engines and other combustion engine-related applications using various computer aided design (CAD) software. 

Delphi designs and manufactures intake manifolds in both metal and composite materials.

• Metal manifolds are appropriate for applications that use the manifold as a structural member of the engine or a conduit for exhaust gas, or in low production volume applications.
• Composite manifolds offer reduced mass and are appropriate in most other applications.

Delphi Composite 8-cylinder Multi-piece Vibration Welded Integrated Air/Fuel Module

Delphi Composite 4-cylinder Integrated Air/Fuel Module

Delphi Non-automotive Integrated Air/Fuel Module

Delphi combines the active runner and plenum to create a flat, more consistent torque curve that provides improved torque over the entire engine speed range.

Delphi charge motion control valve technology is a key enabler to help manufacturers meet California Air Resources Board (CARB) Super Ultra Low Emission Vehicles (SULEV) emissions requirements without an air pump.

Performance Advantages

Delphi has produced more than 37 million IAFMs and more than 21 million plastic manifolds since 1990.

Delphi's IAFM production experience with automotive, motorcycle, and marine engine applications can help guide manufacturers in the selection of the most appropriate materials and configurations for individual applications.

All Delphi IAFMs are developed with the latest analytical design techniques including engine simulation, structural and noise analysis, and computational fluid dynamics (CFD).  Components and modules are bench validated in our fully equipped laboratories to verify conformance to customer performance and durability requirements.  Engine and vehicle level product performance, such as engine power, and torque output, noise levels, and emissions can be characterized in our engine and vehicle dynamometer test facilities.  Delphi also offers a broad range of other capabilities, such as flow and pressure performance at the system level, which can be accomplished by computational analysis and confirmed with physical test results.

Delphi has technical and application centers to support IAFM development in North America, South America, Europe, and the Asia-Pacific Region.

The Delphi Advantage

Delphi is an industry leader in engine management systems, leveraging many years of experience so whether the customer chooses a complete system or an individual component, our systems expertise is built into every product.  Delphi's engine management systems help vehicle manufacturers meet emissions and fuel economy standards without compromising performance, dependability, or value.  Delphi's worldwide presence and a superior breadth of experience and expertise continue to help manufacturers around the world satisfy governmental regulations and consumer demands.