Vehicle load control circuit and method
A vehicle load and control circuit technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of vehicle load control circuit circuit layout, insufficient reserved space, hidden wiring harness or poor assembly, etc.
Active Publication Date: 2020-07-07
UNITED AUTOMOTIVE ELECTRONICS SYST
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Problems solved by technology
Due to the large number of loads such as vehicle electrical appliances, for the prior art, each load needs two wire harnesses to be connected to the BCM, which not only increases the cost of the wire harness, but also generates a large amount of electricity due to the total amount of the two wire harnesses of each electrical appliance. Wiring harness, thus causing troubles for the wiring layout of the vehicle load control circuit, and may even cause insufficient reserved space to hide the defects of wiring harness or poor assembly due to too many wiring harnesses, and improve the function of the corresponding load function caused by the short circuit and aging of the wiring harness failure risk
Method used
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Please refer to figure 2 , the embodiment of the present invention provides a vehicle load control circuit 100, including at least one load 120, an analog input switch 130 for collecting the state of the load 120, and a vehicle body controller 110, the vehicle body controller 110 through a time-sharing The multiplexed single wire harness 140 is respectively connected to the load 120 and the analog input switch 130 .
[0025] Please refer to image 3 , the vehicle load control circuit 100 provided by the embodiment of the present invention, the vehicle body controller 110 includes a microprocessor 111, a drive module 112 and a voltage divider circuit; the voltage divider circuit includes a pulse width modulation power supply VPUP2, a first resistor A series circuit composed of R1, the first diode D1 connected in the forward direction...
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The invention provides a vehicle load control circuit and method, and the circuit comprises at least one load, an analog input switch for collecting the state of the load, and a vehicle body controller, wherein the vehicle body controller is connected with the load and the analog input switch through a time-sharing multiplexing single wire harness. The method comprises the steps that the vehicle body controller controls the load through time division multiplexing of a single wire harness or acquisition of the input state of the analog input switch or output of a driving signal. According to the invention, wire harnesses can be reduced, the short-circuit risk of the wire harnesses is reduced, the cost is reduced, the occupied space of the wire harnesses is reduced, and the circuit layout trouble is overcome.
Description
technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a vehicle load control circuit and method. Background technique [0002] Body Control Module (BCM for short), in automotive engineering, refers to the electronic control unit (ECU) used to control the electrical system of the body, and is one of the important components of the car. Common functions of body controllers include controlling loads such as electric windows, electric rearview mirrors, air conditioning, headlights, turn signals, anti-theft locking systems, central locking, defrosters, hazard warning lights, interior reading lights, and cruise control. The body controller can be connected with other vehicle ECUs through the bus. The body controller outputs a pulse width modulated (PWM) signal to control whether the load is turned on or not. However, whether the PWM signal is output or not needs to be determined by the input signal state of the analog inp...
Claims
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IPC IPC(8): G05B19/042G01R15/04H03K7/08H03K19/0175
CPCG05B19/042G01R15/04H03K7/08H03K19/017509G05B2219/25252
Inventor 王乐熊磊魏庆忠王帅薛洋
Owner UNITED AUTOMOTIVE ELECTRONICS SYST