What is the structure of a throttle position sensor?
1 Answers
Linear output throttle position sensors consist of two contacts (or touch heads) linked to the throttle shaft. One contact slides along a resistor, converting throttle position signals into voltage values (VTA) through resistance changes. The other contact connects with the idle contact (IDL) when the throttle is fully closed. The IDL signal is used for fuel cut-off and ignition timing control. Additional information: 1. Throttle Position Sensor: The throttle position sensor, also known as a throttle opening sensor or throttle switch, primarily detects whether the engine is in idle, load, acceleration, or deceleration conditions. Essentially, it functions as a variable resistor with several switches, installed on the throttle body. 2. Resistor Shaft Linkage with Throttle: The resistor's rotating shaft connects to the throttle and features two contacts: a full-open contact and an idle contact. When the throttle is in the idle position, the idle contact closes, sending an idle condition signal to the ECU. In other positions, the idle contact opens, outputting voltage signals corresponding to different throttle angles. The ECU uses these signals to determine engine load and identify acceleration or deceleration based on voltage changes over time. Based on these conditions, the ECU adjusts fuel injection or implements fuel cut-off control.
