where is the tachometer sensor located

• 2022-01-02

The speed sensor is at the connection between the transmission housing and the engine. If the engine is stable, there is no problem with the speed sensor. The problem is inside the combination instrument. The combination instrument needs to be replaced.

The engine speed sensor is installed at the position where the engine cylinder block is close to the flywheel. Or install it on the edge of crankshaft pulley or crankshaft rear oil seal.

Tachometer sensor is a new type of speed sensor, which uses magnetoresistance as sensing element. The core component is the use of magnetoresistance as the detection element, and then through a new signal processing circuit to reduce the noise and improve the function. When the measured object has a convex (or concave) magnetic or magnetic conductive material, when it rotates with the measured object, the sensor outputs a pulse signal related to the rotation frequency to achieve the purpose of speed measurement or displacement detection.

In the past, automotive sensors were only used in the engine, but now they have been extended to the chassis, body and lighting electrical system. These systems use more than 100 sensors. Among a wide variety of sensors, common ones are: 1. Sensor used in electronically controlled fuel injection engine intake pressure sensor: it reflects the change of absolute pressure in intake manifold, Yes to ECU (engine electronic control unit) provides the reference signal for calculating the fuel injection duration; air flow sensor: measures the amount of air inhaled by the engine and provides it to ECU as the reference signal for fuel injection time; throttle position sensor: measures the opening angle of throttle and provides it to ECU as the reference signal for fuel cut-off, control of fuel / air ratio and correction of ignition advance angle; crankshaft angle Sensor: detect the crankshaft and engine speed and provide it to ECU as the reference signal for determining ignition timing and working sequence; Oxygen sensor: detects the oxygen concentration in the exhaust, It is provided to ECU to control the fuel / air ratio at the optimal value Reference signal near (theoretical value); intake air temperature sensor: detect intake air temperature and provide it to ECU as the basis for calculating air density; water temperature sensor: detect coolant temperature and provide engine temperature information to ECU; deflagration sensor: installed on cylinder block to detect engine deflagration and provide it to ECU to adjust ignition advance angle according to signal. 2 Sensors used in chassis control. These sensors are mainly used in transmission, steering gear, suspension and ABS. Transmission: vehicle speed sensor, temperature sensor, shaft speed sensor, pressure sensor, etc. steering gear includes angle sensor, torque sensor and hydraulic sensor; Suspension: vehicle speed sensor, acceleration sensor, body height sensor, roll angle sensor, angle sensor, etc.