Sensor applications in the automotive industry
Release Date：2013-12-10 00:00
key control system level modern limousine lies using the number and
level sensors , currently only about installing tens to hundreds of
sensors on an ordinary family car , while the number of sensors on
luxury cars can be up to two hundred only , usually more than 30 kinds of species , as many as 100 kinds .
1, with the electronically controlled fuel injection jet engine sensors
) intake air pressure sensor : to reflect changes in the size of the
absolute pressure within the intake manifold is the ECU ( engine control
unit ) offers a reference to calculate the duration of the injection
signal ; Audi 100 sedan (V6 engine ) , Santana 2000 sedan , Beijing Cherokee (25L engine ) , Toyota Crown sedan 3.0 , are using this pressure sensor. Now widely used in the semiconductor piezoresistive pressure sensor intake .
) Air flow sensors: measuring the amount of air sucked in the engine ,
to the electronic control unit (ECU) as a reference injection time
signal ; different measuring principle can be divided into the rotary
-type air flow sensor flap ( TOYOTA PREVIA Touring) ,
Karman vortex air flow sensor swim (Toyota Lexus LS400 sedan ) , hot
air flow sensor ( VG30E Nissan Maxima car engines and domestic passenger
TJ6481AQ4 Tianjin sambong equipped with Volvo B230F engine ) and hot
-film air flow sensor four types . The former two both volume flow type , after the mass flow type . At present, the use of hot air flow sensor and two kinds of hot-film air flow sensor .
) Throttle position sensor : Measure the throttle opening angle , as
off the oil supplied to the ECU to control the fuel / air ratio ,
ignition advance angle correction reference signal ; It has three types :
switch contact type throttle position sensor ( Santana 2000 passenger cars and Tianjin triplet ) , linear variable resistive
throttle position sensor ( Beijing Cherokee ) , integrated throttle
position sensor ( domestic Audi 100 V6 engine ) .
) the crank angle sensor : also called crankshaft position sensor for
detecting a rotational speed of the crankshaft and the engine , to the
ECU for determining the ignition timing reference signal and the
sequence of operations ; There are three types : electromagnetic pulse
crankshaft position sensor , a Hall -effect crankshaft position sensor ( Santana 2000 and Beijing Cherokee ) , photoelectric effect crankshaft position sensor. Crankshaft position sensor is different, its control and the control precision is also different. Crankshaft position sensor is usually installed on the crankshaft
pulley or sprocket side , some mounted on the front of the camshaft ,
and some are mounted on the distributor ( Santana 2000 ) .
5 ) the oxygen sensor : detects the oxygen concentration in the
exhaust gas supplied to the ECU as the control air / fuel ratio at the
optimum value ( theoretical value ) in the vicinity of a reference
6 ) intake air temperature sensor : detects intake air temperature ,
to the ECU as the basis for calculating the density of air ;
7) The water temperature sensor : the temperature of the coolant is detected , the engine ECU provides temperature inion ;
8 ) Knock Sensor: mounted on the cylinder engine specifically detect
detonation conditions , to provide a signal to the ECU adjusted ignition
9 ) Knock Sensor : mounted on the engine block , ready to monitor the engine 's knock . There are currently using resonant and non-resonant two categories .
2 , the chassis control with sensor
A ) Transmission : vehicle speed sensor, a temperature sensor, a shaft
speed sensor, a pressure sensor , the rotation angle sensor has a
direction , a torque sensor , pressure sensor ;
2 ) Suspension : vehicle speed sensor, an acceleration sensor, a
vehicle height sensor, a roll angle sensor, a rotation angle sensor ;
3) ABS: wheel speed sensor.
3 , sensors and safety performance is closely related to the body ,
mainly the airbag sensor , side anti-collision sensors, distance
4 , sensor lighting and electrical systems are mainly light sensor ,
rain sensor volume , air temperature sensors, seat position sensors.
addition, the car 's chassis control , vehicle location / location ,
object detection , visual reinforcement , automotive environment heating
, ventilation, air conditioning, and engine and transmission control,
automatically adjust the driver's seat , driver's seat automatically
adjusts electronically controlled fuel injection injection , emissions ,
anti-lock braking systems, electronic automatic headlight control
brightness control, and so must rely on sensor inion anti