Temperature Compensation System

Sensor Review

ISSN: 0260-2288

Article publication date: 1 June 2004

Keywords

Citation

Rigelsford, J. (2004), "Temperature Compensation System", Sensor Review, Vol. 24 No. 2. https://doi.org/10.1108/sr.2004.08724bad.014

Publisher

:

Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited


Temperature Compensation System

Temperature Compensation System

Applicant: Cummins, Inc., USAPatent number: US6,658,345Publication date: 2 December 2003Title: Temperature compensation system for minimizing sensor offset variations

Keywords: Patents, Temperature sensors

This patent relates to temperature compensation systems for minimizing offset variations in a sensor sensing an operating condition of an internal combustion engine. Such sensors are located in harsh environments and are subjected to widely varying operating conditions but are required to produce consistent results over their entire operating range.

The temperature compensation system for minimizing sensor offset variations includes an engine controller containing a model of sensor operating behaviour over temperature. In one embodiment, the sensor measures differential pressure across a flow restriction mechanism, disposed between an exhaust manifold and an intake manifold of an internal combustion engine. In this embodiment, the sensor is thermally coupled to a structural component of the engine whose operating temperature is readily discernable, e.g. the engine cooling system. Additionally, the engine controller is preferably responsive to transitions of the key switch to gather “hot” and “cold” temperature data. This information is then used to constantly update the sensor model.