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Magnetic Crankshaft and Camshaft Position Sensors with a Complementary Geometry
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Abstract
This paper describes a dual-track magnetic crankshaft and camshaft position sensor configuration. It uses semiconductor sensors such as magnetoresistors to pick up the magnetic flux modulation created by a toothed wheel rotating across a permanent magnet. This sen-sor's magnetic configuration, with a complementary geometry, enhances the accuracy and repeatability of the position pulses. This is critical in obtaining the engine-velocity measurement precision necessary to detect engine misfires as mandated by the OBD-II legislation. The complementary geometry also makes for a more robust design. Finally, the concept can be used for cam-shaft position sensing, with power-on capability.
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Citation
Lequesne, B. and Schroeder, T., "Magnetic Crankshaft and Camshaft Position Sensors with a Complementary Geometry," SAE Technical Paper 980169, 1998, https://doi.org/10.4271/980169.Also In
Electronic Engine Controls 1998: Sensors, Actuators, and Development Tools
Number: SP-1356; Published: 1998-02-13
Number: SP-1356; Published: 1998-02-13
References
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