Combined switch control system and control method

Abstract

The invention discloses a combined switch control system and control method. The control system comprises a combined switch, a BCM (body control module) and a controlled component; an output end of the BCM is connected with an input end of the controlled component through a data bus. A driver controls the action of the combined switch, the combined switch emits a control request signal and transmits the signal to the BCM in a coding manner; the control request signal is edited as a message after being decoded by the BCM and then sent to the data base; and the controlled component receives themessage sent by the BCM and performs the corresponding action. The control system in the invention can realize control of the lamps and the wipers in a small current, can reduce the fault rate of theswitch and improves the service life of the switch; since each switch is provided with a plurality of control functions, the output loop and wiring are reduced, the design cost is reduced, and the assembling process performance, the reliability of the system and the security of the circuit are improved. The BCM and the data bus body network are introduced into the control method provided by the invention, thus, the wiring harness is optimized and the reliability and comfortableness of an automobile are improved.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a combined switch control system and control method using small current control. [0002] Background technique [0003] The car combination switch is a multifunctional combination switch used to control lighting and light signal devices and other accessories. The traditional automotive combination switch is a mechanical high-current control switch, and each sub-switch inside it has contacts. The closing or opening of these contacts is used to transmit signals or drive loads. Generally, these switches need to carry a large load current, which can be Reaching 20A, in order to allow such a large load current to pass, the contact of the automobile combination switch and the mechanism of operating the contact are usually designed with a larger shape and size, and are made of precious metals such as copper or silver alloys, so this kind of Combination switches are large in size, com...

AI Technical Summary

Problems solved by technology

The traditional automotive combination switch is a mechanical high-current control switch, and each sub-switch inside it has contacts. The closing or opening of these contacts is used to transmit signals or drive loads. Generally, these switches need to carry a large load current, which can be Reaching 20A, in order to allow such a large load current to pass, the contact of the automobile combination switch and the mechanism of operating the contact are usually designed with a larger shape and size, and are made of precious metals such as copper or silver alloys, so this kind of Combination switches are large in size, complex in internal structure, heavy in weight, and high in cost. In addition, the large current passing through the working process can easily cause high temperature at the contact point of the switch, which will cause burning and melting of the local contact position of the switch, thereby making the switch invalid and poor in reliability.

At the same time, since the traditional steam combination switch is a combination of multiple function switches, and each function switch has multiple controls and logics, each control function corresponds to an output circuit. Therefore, the more functions of the traditional combination switch, the more output circuit. More, the more complex the wiring harness of the combination switch, which is very detrimental to saving costs and improving reliability

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