The application of brake force detection in automobile

One of the characteristics of the development of modern automobile technology is that more and more parts adopt electronic control. For example, electronically controlled fuel injection, exhaust emissions, anti-lock brakes, automatic air conditioning, headlight brightness control, automatic driver seat adjustment, steering control, electrically controlled suspension, etc. Electronic automatic control relies on information overload of sensors. According to the role of sensors, they can be classified as sensors that measure temperature, pressure, flow, position, gas concentration, speed, brightness, dry humidity, distance and other functions. They all perform their respective functions. Once a sensor fails, the corresponding device will not work normally or even not work. Therefore, the role of sensors in the car is very important. Automotive sensors, once used solely for engines, are now being extended to chassis, body and electrical lighting systems. These systems use more than 100 types of sensors. Among a wide variety of sensors, common ones are:

1. The intake pressure sensor used in the electronically controlled fuel injection engine: it reflects the change of absolute pressure in the intake manifold and provides the reference signal for the ECU (engine electronic control unit) to calculate the duration of fuel injection; Air flow sensor: Measure the amount of air absorbed by the engine and provide the ECU as the reference signal of fuel injection time; Throttle position sensor: the throttle Angle is measured and provided to THE ECU as a reference signal for cutting off oil, controlling fuel/air ratio and ignition advance Angle correction; Crankshaft Angle sensor: Detects crankshaft and engine speed, and provides ECU as the reference signal to determine ignition timing and working sequence; Oxygen sensor: Detects oxygen concentration in the exhaust and provides the ECU as a reference signal for controlling the fuel/air ratio near the optimum (theoretical) value; Intake temperature sensor: It detects intake temperature and provides it to ECU as the basis for calculating air density. Water temperature sensor: Detects the temperature of the coolant and provides engine temperature information to the ECU; Deflagration sensor: It is mounted on the cylinder block specially to detect the deflagration status of the engine and provide the ECU to adjust the ignition advance Angle according to the signal.

2. Sensors for chassis control. These sensors are mainly used in transmission, directional control, suspension and ABS. Transmission: have speed sensor, temperature sensor, shaft speed sensor, pressure sensor, etc., directional sensor has Angle sensor, torque sensor, hydraulic sensor; Suspension: vehicle speed sensor, acceleration sensor, body height sensor, side Angle sensor, Angle sensor, etc. ABS: It has a wheel speed sensor.

3. Body sensors are closely related to safety performance, mainly including airbag sensors, side anti-collision sensors, ranging sensors, etc.

4. The sensors of lighting and electrical system mainly include light detection sensor, raindrop volume sensor, air conditioning temperature sensor, seat position sensor, etc.