Sensors on the car
Now the car is more and more intelligent,
many functions on the car are controlled by the computer to complete, such as
engine systems, transmission systems, suspension systems, brake systems, air
conditioning systems, body control systems and so on. The computer has to
control the system, must obtain the correct information to confirm the state of
the system, and then issue the correct instructions to control the system
action, so the implementation of the driver's intention, the correct control of
the car. The information on these reaction system states is done by a component
called a sensor. Even a very common car, up to dozens of sensors, and up to
hundreds of cars. So what are the effects of these sensors?
What is a car sensor?
We are in the daily maintenance of the car,
often hear a variety of sensors, then in the end what is the car sensor?
In the operation of the car, the system
will be in different working conditions, such as water temperature, oil
temperature, intake pressure, speed, throttle position, stalls, etc., these
information car computers can not read directly, must be translated into the computer can recognize the electrical signal. Car sensor is the implementation
of this task, it is running the car light, electricity, temperature, pressure,
time and other information into electrical signals, and then enter the car the computer system, and then by the computer in advance of the stored procedures
for the calculation and analysis, thus Determine the running status of the car.
Now the car on the sensor is very much, here we talk about the car system in
the name of the sensor and the role.
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Injection molding is equally important for medical products
1, the intake pressure sensor
Intake manifold pressure sensor (MAP)
The function of the intake manifold
pressure sensor (MAP) is to detect the degree of vacuum of the intake manifold
and to convert the pressure signal into an electronic signal to the engine
control computer. It is the main reference signal for controlling the pulse
width and ignition timing
Divided into two types of semiconductor
varistor and capacitive intake manifold pressure sensor.
Ingress manifold pressure sensor failure,
the engine will start difficult, performance disorders, acceleration
deterioration, idle instability, fuel consumption, accelerated instability,
accelerated tempering, blasting, fuel consumption, deflagration and other
failures.
2, the crankshaft position sensor
Crankshaft position sensor (CKP)
Crankshaft position sensor (CKP) is one of
the most important sensors in the engine centralized control system. It is an
indispensable source for confirming the crank angle position and the engine
speed. The engine control module (ECU) uses this signal to control the fuel
injection quantity, Timing, ignition timing (ignition advance angle), ignition
coil charging closure angle, idling speed and electric gasoline pump operation.
3, the camshaft position sensor (CMP)
The camshaft position sensor is used to
detect the angular position of the camshaft. The engine control module (ECU)
uses this signal to determine the cylinder sequence of the engine to control
the injection sequence, the ignition sequence
When the camshaft position sensor fails,
the engine output power will be reduced.
4, the engine coolant temperature sensor
(ECT)
The engine coolant temperature sensor is
used to detect the temperature of the engine coolant and convert the
temperature signal into an electrical signal to the engine control module (ECU)
as the primary correction signal for gasoline injection, ignition timing,
idling and exhaust emission control.
5, piezoelectric knock sensor
The knock sensor is used to detect the
knocking of the engine during combustion and to send the knock signal to the
engine control computer as an important reference signal for correcting the
ignition advance angle
Knock sensor with non-resonant and resonant
type of two, generally installed in the 2-cylinder and 3-cylinder, or 1, 2 the cylinder in the middle of a 3,4-cylinder in the middle one. The connection of
the general knock sensor is wrapped with shielded wire.
When the knock sensor failure, the engine
will deflagration, ignition timing inaccurate, high fuel consumption, power
reduction, the engine work rough
