SENSORS

Delphi Mini-Switching Oxygen Sensors
Delphi Mini-Switching Oxygen Sensors provide stoichiometric
measurement of exhaust gases in gasoline and alternative fuel
engine applications to help manufacturers meet current and future
exhaust emissions standards by providing more accurate engine
control and better exhaust system diagnostics. The Mini-Switching
Sensors are based on Delphi's proven Switching Oxygen Sensor
technology, but feature a dramatic reduction in size and weight —
up to 50 percent smaller size and only about a third of the weight.
Their smaller size enables significantly reduced light-off — up to
50 percent faster — for improved emissions benefits.
Delphi Mini-Switching Oxygen Sensors, like Delphi's conventional
Switching Oxygen Sensors, feature planar element technology for
fast light-off and low cost, and they have a pumped air reference
feature to prevent air reference contamination. They also include
a zirconia-based element with planar geometry. Delphi MiniSwitching Oxygen Sensors can be used in an exhaust system in
either an engine-out or in a post-converter location.

Benefits

Delphi's Mini-Switching Oxygen Sensors for
small engine applications are dramatically
smaller in size than our proven conventional
Switching Oxygen Sensors while offering
similar features and benefits.

Significantly reduced size enables applications for small gasoline
engines that require closed-loop control (e.g. motorcycles).
Compatible with applications that can use gasoline-ethanol blended fuels (e.g. zero-turn commercial lawn mowers).
12 mm sensor thread enables easier installation on small exhaust pipes.
A lower shield has a shorter insertion depth into the exhaust pipe and a smaller diameter, which reduces exhaust
restriction especially in small diameter exhaust pipes.
Fast light-off time with a low-wattage heater can help reduce system costs and help reduce cold-start emissions.
Pumped air reference prevents air reference contamination from various sources, including: grommet, exhaust and
external sources.
Delphi's industry-leading, poison-resistant coating helps optimize sensor durability.
While shorter than our conventional Switching Oxygen Sensors, Delphi Mini-Switching Oxygen Sensors maintain a
high-temperature capability enabling flexibility for location of the sensor and consistent operation across a wide range
of temperatures. Their mounting location flexibility and high temperature tolerance contribute to improved sensor
performance, reliability and durability.
o An integrated heater allows the sensor to be mounted further downstream preventing sensor biasing due to
close proximity to the exhaust ports.
o With an integrated heater, the sensor remains active under all conditions, including extended idles.
Low power consumption helps minimize the vehicle's electrical energy requirements.
Robust construction resists thermal shock without cracking.

Typical Applications
Delphi offers Mini-Switching Oxygen Sensors for gasoline engine programs, such as motorcycles which will
require closed-loop sensors to help meet anticipated new exhaust emissions regulations. The sensors can
also be used in engine programs for commercial products such as lawn mowers and power generators,
and for "power sports" products such as personal ATVs, to enable the use of gasoline-ethanol
blended fuels.

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