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2. Hall effect sensor - Wikipedia

   en.wikipedia.org/wiki/Hall_effect_sensor

   Hall effect devices produce a very low signal level and thus require amplification. The vacuum tube amplifier technology available in the first half of the 20th century was too large, expensive, and power-consuming for everyday Hall effect sensor applications, which were limited to laboratory instruments.

3. Jeep four-wheel-drive systems - Wikipedia

   en.wikipedia.org/wiki/Jeep_four-wheel-drive_systems

   In 1993 Jeep re-introduced Quadra-Trac, this time on the Jeep Grand Cherokee using the NP249 transfer case. Like the NP219, this transfer case utilizes a center differential with a viscous coupler to provide smooth and efficient four-wheel drive operation on all surfaces. This system has 4WD All-Time, Neutral, and 4WD Low modes.

4. List of sensors - Wikipedia

   en.wikipedia.org/wiki/List_of_sensors

   1 Acoustic, sound, vibration. 2 Automotive. 3 Chemical. 4 ... Triangulation sensor; Touch switch; Wired glove; Sensor technology ... Speed sensors are machines used ...

5. Traction control system - Wikipedia

   en.wikipedia.org/wiki/Traction_control_system

   The predecessor of modern electronic traction control systems can be found in high-torque, high-power rear-wheel-drive cars as a limited slip differential.A limited-slip differential is a purely mechanical system that transfers a relatively small amount of power to the non-slipping wheel, while still allowing some wheel spin to occur.

6. Transmission control unit - Wikipedia

   en.wikipedia.org/wiki/Transmission_Control_Unit

   The TPS sensor along with the vehicle speed sensor are the two main inputs for most TCUs. Older transmissions use this to determine engine load, with the introduction of drive-by-wire technology, this is often a shared input between the ECU and TCU. The input is used to determine the optimum time and characteristics for a gear change according ...

7. Jeep Cherokee (XJ) - Wikipedia

   en.wikipedia.org/wiki/Jeep_Cherokee_(XJ)

   The Jeep Cherokee (XJ) is a sport utility vehicle manufactured and marketed across a single generation by Jeep in the United States from 1983 (model year 1984) through 2001 — and globally through 2014. It was available in two- or four-door, five-passenger, front-engine, rear- or four-wheel drive configurations.