SENSORS

Delphi Differential Pressure Sensor
The Delphi Differential Pressure Sensor, or "Delta P Sensor,"
provides a voltage output to an engine management system
proportional to the differential pressure (∆ p) between two sources.
The sensor is designed primarily for use in diesel engine
applications to signal the need for regeneration of the system's
particulate filter, or soot trap.
Since a diesel engine produces a greater volume of particulate
matter than a gasoline engine, it typically requires a trap (filter) to
minimize particulate exhaust emissions. As matter produced by
combustion accumulates in the particulate trap, the pressure
differential across the trap increases. The Delphi Differential
Pressure Sensor precisely measures the status of the matter
blockage in the particulate trap and provides input to the engine
management system to initiate regeneration, or a burn-off of the
excess particulates in the trap. This process enables the diesel
engine management system to maintain the required limit of
particulate matter emissions.

Benefits
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Delphi Differential Pressure Sensors

Mounting flexibility and small size enhances system packaging requirements
All silicon solid state technology for durability and reliability
Temperature compensated
Electro magnetic interference (EMI) protected
Meets OBD II requirements for diagnostic bands

Typical Applications
The Delphi Differential Pressure Sensor is designed for a range of light duty diesel automotive and heavy
duty diesel commercial vehicle applications. It is also suitable for other diesel systems in which filter
regeneration is required, including stationary power generator applications, and solid oxide fuel cells.

Availability
Engineering samples will be available to qualified manufacturers in 2013. Contact Delphi for further
information.

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