Rapid growth of electronic controls in the automotive application field has increased the need for position sensors with longer life and higher accuracy. Non-contact (optic and magnetic) type position sensors offer advantages in durability, but lack in required output accuracy. Contact type position sensors are able to offer high output accuracy in initial condition and advantages such as more temperature stability, higher resolution, and EMI resistance at lower cost. However, their performance degrades over life which is attributed primarily to abrasion between the resistive element and the contact brush. This problem has been solved by developing an improved resistive element made from material with excellent durability against brush contact abrasion. Also better output accuracy was required for position sensor types serving in the engines electronic throttle control. In order to cope with the electronic control current a new resistive element called KCP (Komatsu conductive plastics), compatible with durability and high (micro-gradient) output accuracy, has been employed successfully. This paper reports in detail about the quality engineering, materials and processes optimisation, and enhanced reliability in the new development of KCP.
High-performance, flat surface resistive element (KCP), and its application in automotive sensors
Flaches Hochleistungswiderstandselement (KCP) und seine Verwendung in Fahrzeug-Sensoren
2002
10 Seiten, 23 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
Abrieb , Anwendbarkeit , berührungslose Abtastung , Betriebssicherheit , Bürste (Schleifkontakt) , elektrischer Widerstand (Bauelement) , elektronische Regelung , EMI (elektromagnetische Störung) , Ermüdungslebensdauer , Fahrzeugausrüstung , Kontaktsensor , magnetischer Sensor , niedrige Kosten , optischer Sensor , Positionssensor , Präzision , Prozessoptimierung , Qualitätstechnik , Sensor elektrischer Größen , Sensor nach Technologie , Warmfestigkeit , Werkstofftechnik , Zuverlässigkeit
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