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Dongfeng Yueda Kia K5 sedan body electrical system technology Highlights Reading

K5 is produced by Dongfeng Yueda Kia Optima sedan replacement products, high-tech car, in order to facilitate the readers understanding of the car, its vehicle electrical system in this technology highlights briefly.

First, the Controller Area Network (CAN)
K5 vehicle body controller area network standard electrical control unit comprising a vehicle body (the BCM), the smart junction box (SJB) and the meter control unit (Clum) , if the optional control unit and the smart key power seat control unit (PSM) also was added to the standard three control units in the network, then the car body electrical controller area network including a control unit 5.

Electric vehicle LAN network controller

of the vehicle body control unit KWP2000 (K-line) communication, self-diagnosis using the diagnostic support, the sensor output and actuator checks the smart key control unit via a separate communication line K, and diagnostic support control key fob diagnostic features (diagnostic register and the smart key, performs checks, etc.), the meter control unit LAN line by the powertrain controller body and transfer electrical functions as a gateway LAN line information.

1. Body Control Unit

The control unit located in the vehicle body upper portion of an accelerator pedal (FIG. 2), compared with the previous model, certain characteristics of the vehicle body using K5 and control logic of the control unit changed. The vehicle body control unit performs communication with the smart junction box, the parking assist control unit, remote keyless entry receiver, and a buzzer are built in the body control unit.

Figure 2 vehicle body control unit

2. Smart key control unit

The control unit is located near the smart key air filter, and its main characteristics comprising: a power control relay; by the body controlLAN communication transmitter is a passive locking / unlocking commands to the vehicle body control unit; controls serial communication unit transmits the authentication data to the engine, and an engine control unit receives a feedback signal; and a control key fob authentication antenna; K via a communication line failure diagnostic support and communication, in order to achieve its diagnosis; LAN receives engine state by the powertrain controller, automatically sets the type of automatic transmission and a manual transmission and an engine; check antitheft device authentication key data communications.

3. A smart junction box (SJB)
a smart junction box (FIG. 4) located in the bottom left of the instrument panel, a controller in communication with a local area network of the vehicle body. The previous model is controlled by the body control unit separate input / output functions, the smart junction box now control the input / output control unit according to the vehicle body controller area network communication command, and controls a light intelligent power and a load. The semiconductor device is called a new assembly ARISU-LT, the smart junction box does not make any determination logic, the control unit executes only the commands of the vehicle body, but it can detect a failure of the output means.

FIG 4 intelligent terminal box

(1) the main function

intelligent junction box control unit, and a meter control unit transmits a smart key switch state signal the control unit to the vehicle body through the LAN communication controller that controls schematics as the picture shows.

FIG switch input control theory

① relay output control

Controller LAN signal to the body control unit, the relay performs on / off operation, the control principle shown in FIG. FIG.

switch input control scheme

② lighting control (Intelligent Power Device)
FIG lighting control principle shown in FIG. LAN controller information is transmitted to the vehicle body control unit, the smart junction box for detecting a current flowing through the lamp intelligent power supply device, when detecting the overcurrent limit, the lamp will extinguish.

Smart power supply device lighting control scheme

③ lighting control (integrated control)
control diagram shown in FIG. A smart junction box directly to check the battery voltage, if the detected voltage is high (more than 13.2 V), the smart junction box for a control pulse (voltage is kept constant) by integrated control.

integrated lighting control scheme

[For details, see the rest of the car and driving 2011,2 repair service version]

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