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Delphi Variable Reluctance Sensor

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SENSOR

The Delphi Variable Reluctance Sensor is an electro-magnetic

device that measures engine speed and position, transmissionspeed, and vehicle speed. It is designed for use with control unitsthat accept analog input.

Delphi Variable Reluctance Sensor consists of a permanentmagnet surrounded by a winding of wire and, for applicationflexibility, it can be used in conjunction with a ferrous target thathas either notches or teeth. Rotation of the target wheel near thetip of the sensor changes the magnetic flux creating an analogvoltage signal in the sensor coil that is proportional to the rotatingspeed and position. The voltage signal is sent to the control unitwhere it is often converted to a digital signal to support the

controlling function.

The Delphi Variable Reluctance Sensor is available in both overmolded and non-over molded discrete designs, in both sealedand unsealed configurations, and with or without a harness.

Benefits

Low cost, robust proven speed and position sensing technology

Self-generating electrical signal requires no external power supply

Fewer wiring connections contribute to excellent reliability

Meets a wide range of output, resistance, and inductance requirements so the sensor can be tailored to meet specif

customer requirements

Typical Applications

The Delphi Variable Reluctance Sensor is designed for use in a wide range of automotive applicationsincluding engine (cam and crank: speed and position) and transmission (input and output speed).

Delphi's Variable Reluctance Sensor is well-suited for a variety of other industrial applications.

Performance Advantages

The Delphi Variable Reluctance Sensor's non-overmolded coil design and unique termination technique

help provide high reliability and low warranty returns. The over molded design offers further costadvantages. Due to their efficient magnetic circuit design and packaging flexibility, Delphi's VariableReluctance Sensor can be tailored to meet customer objectives for smaller packaging, larger air gapcapability, higher temperatures, and maximized output.

Performance Specifications

Output 0.25 V to 400 V

Air gap 0.25 mm to 2.8 mm

Resistance 200 to 4,000

Temperature -40C to 165C

Delphi Variable Reluctance Sensor

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www.delphi.com | Delphi. All rights reserved. |

Delphi Variable Reluctance Sens

Typical Delphi Variable Reluctance Sensor

Output versus Air Gap

The Delphi Advantage

Delphi has one of the industry's most complete portfolios of sensors. Delphi has the experience and theexpertise to provide extremely reliable, highly accurate and very cost competitive sensors for a wide rangeof applications. And, Delphi can provide a single component or a multifunctional "smart" module to meetspecific customer needs.

As a global leader in engine and powertrain management systems technology, Delphi can helpmanufacturers around the world meet emissions requirements, improve fuel economy and enhanceperformance. Delphi is a source for high value solutions and our systems expertise is built into everyproduct. Delphi's flexible engineering approach encourages collaboration. And, Delphi has a thorough

understanding of automotive markets around the world and a global network of resources.

The Delphi Variable Reluctance Sensor i savailable in various configurations for a widerange of automotive and non-automotivespeed and position sensing applications.

This curve represents air gap for a typical Delphi VariableReluctance Sensor application. Higher output at larger air gaps canalso be provided.