A throttle position sensor (TPS) is the sensor used to monitor the vehicle's throttle position. The sensor is usually located on the butterfly/axle shaft so it can directly monitor the throttle position. A more sophisticated sensor form is also used, for example an additional closed throttle position sensor (CTPS) can be used to indicate that the throttle is completely closed. Some engine control units (ECUs) also control throttle position throttle (ETC) or "drive by wire" throttle control systems and if they are done, position sensors are used in the feedback loop to enable the control.
Associated with TPS are accelerator pedal sensors, which often include wide open throttle (WOT) sensors. Accelerator pedal sensors are used in electronic throttle control systems (ETC) or "drive by wire", and the most common use of wide open throttle sensors for kick-down functions on automatic transmissions.
The modern sensor is a non contact type. This modern non-contact TPS includes Hall effect sensor, Inductive sensor, magnetoresistive and others. In potentiometric type sensors, the multi-fingered metal brush/rake is in contact with the resistive strip, while the butterfly valve is rotated from the lower mechanical stoppage (minimum air position) to the WOT, there is a change in resistance and this resistance change is given as input to the ECU.
Types of Non-contact TPS works on Hall effect principle or Inductive sensor, or magnetoresistive technology, where generally the inductive magnetic or loop is the dynamic part that is mounted on the throttle spindle/gear & sensor valve & amp; signal processing circuit boards are installed inside the ETC and stationary equipment enclosure. When the magnetic/inductive loop is mounted on the spindle that is rotated from the lower mechanical shutdown to the WOT, there is a magnetic field change for the sensor. The magnetic field changes are felt by the sensor and the resulting voltage is given as input to the ECU. Usually a two-pole ground magnet is rarely used for TPS because of the high Curie temperatures required in the vehicle environment under the hood of the car. Magnets may be of a diametrical type, ring type, rectangular type or segment. The magnet is defined to have a particular magnetic field that does not differ significantly with time or temperature. In the event of a TPS operation failure, the CHECK ENGINE lamp remains lit even if there are no problems or errors in the ECU. This can not be corrected by removing ECU errors by running the diagnostic software. To repair the damage, TPS must be replaced with a new one.
Video Throttle position sensor
See also
- Producing
- Sensor list
Maps Throttle position sensor
Note
Source of the article : Wikipedia
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