WHEEL SPEED SENSORS www.ntn-snr.com

HISTORY CREATOR of the instrumented wheel bearing, NTN-SNR developed a new technology for series production and launched it on the market in 1997: ASB® (Active Sensor Bearing). That technology makes it possible to replace so-called passive technology with “active” technology, comprising an active sensor and a seal with an integrated magnetic encoder. The latter features a series of very precise north and south poles that send a digital signal corresponding to the rotary speed of the wheel. The vehicle’s on-board computers need that information to operate systems such as ABS, ESC, hill-start assist,...

WHAT DOES A WHEEL SPEED SENSOR DO? A speed sensor plays an essential role in the operation of many on-board systems. The sensor measures the speed of the wheel on the magnetic encoder seal or on the toothed wheel located on the bearing. On recent vehicles, wheel speed sensors transmit speed data to many other systems which control vehicle dynamics along with a wide range of ancillary functions. WARNING! LOSS OF THE ASB® SIGNAL MAY HAVE SERIOUS CONSEQUENCES The ASB fault light will illuminate on the dashboard: the ABS system is switched off. Helps prevent the wheels from locking up during sudden...

AVAILABLE TECHNOLOGIES PASSIVE SENSORS A toothed wheel is mounted on the wheel bearing. The sensor consists of a coil, which is wound around a magnetic core and a permanent magnet. When rotating, the teeth of the wheel generate a magnetic field, the frequency of which gives the speed of rotation of the wheel. This technology cannot detect very low speeds, nor can it recognise the direction of rotation of the wheel. Passive sensors are used only opposite toothed wheels. ACTIVE SENSORS The main advantage of an active system is that it delivers a signal with constant amplitude, even at low speed...

When the sensor requires replacement, an ABS indicator light appears on the dashboard. The driver can also feel the effects on the brake pedal caused by the false triggering of the ABS. The sensor is the source of the problem in around 80% of all ABS system faults. WHY DO SPEED SENSOR FAIL? The wheel speed sensor is not a wearing part; however a failure can immobilize the vehicle. As part of security it is essential to be able to supply a quality part and in the shortest time. The location of the sensors leaves them very exposed to extremely harsh conditions. NTN-SNR products are tested and have...

THE NTN-SNR PRODUCT RANGE NTN-SNR offers a full line of wheel speed sensors combining all of the technologies available on the market. Our wheel speed sensor range includes nearly 300 product numbers. 65% of those product numbers relate to active sensors and 35% relate to passive sensors, thereby covering the full spectrum of technologies on the market. Our range serves more than 7,000 vehicle applications. WHY IS AN NTN-SNR SENSOR THE RIGHT CHOICE? Their position as wheel bearing specialists enabled NTN-SNR to develop ASB® technology in collaboration with vehicle manufacturers. CREATOR of ASB®,...

#SECURITYINSIDE NTN-SNR PROVIDES ITS CUSTOMERS WITH ALL POTENTIALLY USEFUL TECHNICAL INFORMATION: 2017 Sensoren / Sensori / Sensores / Czujniki / датчиков / Sensoren Dedicated to sensors with a link to the wheel bearing kit Sensoren / Sensori / Sensores / Czujniki / датчиков / Sensoren CAPTEURS DE VITESSE DE ROUES Capteurs de vitesse de roues Informations montage / démontage Le capteur de vitesse de roue est essentiel au fonctionnement de nombreux systèmes de sécurité du véhicule type ABS, ESP… Il existe deux types de capteurs : - Capteurs actifs : en relation avec un codeur magnétique intégré...

DOC.RABROCHSENSOR.GBA CODE SAP 395544 - Document non contractuel - NTN-SNR copyright international - 01/17 - Photos : NTN-SNR - Pedro Studio Photos - Visuelys WHEEL RANGE This document is the exclusive property of NTN-SNR ROULEMENTS. Any total or partial reproduction hereof without the prior consent of NTN-SNR ROULEMENTS is strictly prohibited. Legal action may be brought against anyone breaching the terms of this paragraph. NTN-SNR ROULEMENTS shall not be held liable for any errors or omissions that may have crept into this document despite the care taken in drafting it. Due to our policy of...